Ericsson AB

Sweden

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IPC Class
H04L 12/56 - Packet switching systems 12
H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing 10
H04L 29/06 - Communication control; Communication processing characterised by a protocol 8
H04J 14/02 - Wavelength-division multiplex systems 7
H04J 3/16 - Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted 6
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Status
Pending 13
Registered / In Force 55
Found results for  patents

1.

CONFLICT DETECTION AND RESOLUTION IN AN ABR NETWORK USING CLIENT INTERACTIVITY

      
Document Number 02942137
Status Pending
Filing Date 2015-03-02
Open to Public Date 2015-09-11
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Reynolds, Jennifer Ann
  • Dasher, Charles Hammett
  • Huber, Michael

Abstract

A scheme for managing conflict resolution in an ABR streaming environment with respect to a bandwidth pipe serving a customer premises, in one aspect when a session request is received from a new ABR client launched in the customer premises that includes one or more existing ABR clients having corresponding streaming sessions, a bandwidth forecasting module is configured to forecast bandwidth, requirements with respect to the corresponding ABR streaming sessions after accounting for a bandwidth requirement for the new ABR client's session request, A conflict condition may be detected if any of forecasted band width requirements violates a bitrate threshold policy relative to the corresponding ABR streaming sessions and/or the new session being requested, if there is a conflict, an interactive session may be launched with one or more clients for facilitating user selection of one or more options relative to the impending conflict condition.

IPC Classes  ?

  • H04L 29/06 - Communication control; Communication processing characterised by a protocol
  • H04L 12/911 - Network admission control and resource allocation, e.g. bandwidth allocation or in-call renegotiation

2.

ABR VIDEO WHITE SPOT COVERAGE SYSTEM AND METHOD

      
Document Number 02941701
Status Pending
Filing Date 2015-03-05
Open to Public Date 2015-09-11
Owner ERICSSON AB (Sweden)
Inventor
  • Kolhi, Johan
  • Phillips, Chris
  • Huber, Michael
  • Kastanis, Diomedes

Abstract

A scheme for managing ABR streaming of content in a wireless radio network environment that may have radio white spot areas. Upon determining that the wireless UE device executing an ABR client application is in a radio white spot area, the current ABR streaming session may he suspended at a particular segment. Thereafter, playback of other content locally cached at the wireless UE device may be commenced in lieu of the ABR media segments. When the wireless UE device exits the radio white spot area, the ABR streaming session may be resumed from a point adjacent to the particular segment where the ABR streaming session was suspended.

IPC Classes  ?

  • H04N 21/262 - Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission or generating play-lists
  • H04W 4/02 - Services making use of location information
  • H04W 80/12 - Application layer protocols, e.g. WAP [Wireless Application Protocol]
  • H04L 12/811 - Bitrate adaptation in active flows
  • H04N 19/46 - Embedding additional information in the video signal during the compression process
  • H04W 4/30 - Services specially adapted for particular environments, situations or purposes
  • H04L 29/06 - Communication control; Communication processing characterised by a protocol

3.

SYSTEM AND METHOD FOR SECURING CONTENT KEYS DELIVERED IN MANIFEST FILES

      
Document Number 02939396
Status Pending
Filing Date 2015-02-11
Open to Public Date 2015-08-20
Owner ERICSSON AB (Canada)
Inventor
  • Nair, Raj
  • Ma, Kevin
  • Mikhailov, Mikhail

Abstract

A method and a user device ate disclosed for securing streaming content decryption. The method includes receiving at the user device a manifest for requested content, the manifest providing a. Content Encryption Key (CEK) that is encrypted using a first public Key Encryption Key (KEK), a corresponding first private KEK. being stored in secure storage on the user device; decrypting, inside a secure processing zone on the user device, the CEK using the first private KEK to create a decrypted content key; decrypting, inside the secure processing zone, requested content using the decrypted content key to form decrypted content, and providing the decrypted content to a decoder on the mobile user device.

IPC Classes  ?

  • H04L 9/30 - Public key, i.e. encryption algorithm being computationally infeasible to invert and users' encryption keys not requiring secrecy
  • H04N 21/4405 - Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to MPEG-4 scene graphs involving video stream decryption

4.

SYSTEM AND METHOD FOR OPTIMIZING DEFRAGMENTATION OF CONTENT IN A CONTENT DELIVERY NETWORK

      
Document Number 02929115
Status Pending
Filing Date 2014-10-31
Open to Public Date 2015-05-07
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Forsman, Robert Hammond
  • Reynolds, Jennifer Ann

Abstract

A system and method for optimizing defragmentation of content in a content delivery network (CDN). In an example, a manifest available to the content delivery node with respect to a particular content as well as segment files stored in a database cache of the content delivery node are analyzed to determine if any segment files referenced by the manifest are absent from the database cache. If so, one or more delivery rules associated with the content delivery node based on historical ABR asset delivery patterns may be applied to determine representations of the absent segment files that satisfy the one or more delivery rules. After determining compliant representations of the absent segment files, they may be pulled from another content delivery node of the CDN (e.g., a parent node or an edge server node).

IPC Classes  ?

  • H04N 21/25 - Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication or learning user preferences for recommending movies

5.

SYSTEM AND METHOD FOR PRE-PROVISIONING ADAPTIVE BITRATE (ABR) ASSETS IN A CONTENT DELIVERY NETWORK

      
Document Number 02929294
Status Pending
Filing Date 2014-10-31
Open to Public Date 2015-05-07
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Forsman, Robert Hammond
  • Reynolds, Jennifer Ann

Abstract

A system and method for pre-provisioning ABR assets m a content delivery network (CDN), In an example, historical delivery patterns of one or more ABR assets downloaded at respective content delivery nodes of the CDN are monitored. For each. content delivery node, one or more delivery rules may be determined based on statistical distributions of the ABR assets delivered over a period of" time. When a particular content is determined to become popular at a specific content delivery node, a pre-provisloning policy may he modulated such that only certain representations or adaptation sets of the particular content's assets that pass the delivery rules are pre- provisioned for the specific content delivery node.

IPC Classes  ?

  • H04N 21/25 - Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication or learning user preferences for recommending movies

6.

SOFTWARE-DEFINED MEDIA PLATFORM

      
Document Number 02927890
Status Pending
Filing Date 2014-10-20
Open to Public Date 2015-04-23
Owner ERICSSON AB (Sweden)
Inventor
  • Tweedale, Paul
  • Wu, Chin-Cheng
  • Shearer, Michael
  • Ng, Tung

Abstract

A software-defined media platform (100) having one or more media processing units (108, 112-1 to 112-N, 116) that may be dynamically instantiated, interconnected and configured according to changes in demand, resource availability, and other parameters affecting system performance relative to demand In one example media processing method a source media stream (106) may be received via multicast or unicast. The source media stream (106) may be processed into one or more levels of work product segments (107, 115-1 to 115-3) having different media characteristics by a plurality of transcoding processing units, as needed. One or more levels of work product segments (107, 115-1 to 115-3), or the source media stream (106), may be packaged (e.g., including resegmenting) into final work product segments (117) having select media characteristics, which may be uploaded to a cloud storage unit (118) for delivery to end users (122-1 to 122-N).

IPC Classes  ?

  • H04N 21/60 - Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client; Communication details between server and client
  • H04N 21/2343 - Processing of video elementary streams, e.g. splicing of video streams or manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
  • H04N 21/24 - Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth or upstream requests
  • H04N 21/643 - Communication protocols
  • G06F 9/455 - Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
  • G06F 15/00 - Digital computers in general; Data processing equipment in general

7.

NETWORK PERSONAL VIDEO RECORDER SAVINGS WITH SCALABLE VIDEO CODING

      
Document Number 02926475
Status Pending
Filing Date 2014-10-06
Open to Public Date 2015-04-16
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Dasher, Charles Hammett
  • Forsman, Robert Hammond

Abstract

A network node in a network personal video recorder (NPVR) system receives a request from a user to record a program asset provided on a channel and responsive to a count of enhancement recordings of the channel being equal to zero, starts a plurality of enhancement layer encode captures from the broadcast feed of the channel into an enhancement warehouse. The network node also starts a base layer encode capture of a broadcast feed of the channel into an NPVR warehouse associated with the user and increments the count of enhancement recordings of the channel by one.

IPC Classes  ?

  • H04N 21/231 - Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers or prioritizing data for deletion
  • H04N 21/234 - Processing of video elementary streams, e.g. splicing of video streams or manipulating MPEG-4 scene graphs
  • H04N 21/4147 - PVR [Personal Video Recorder]

8.

SYSTEM AND METHOD FOR EFFECTUATING FAST CHANNEL CHANGE IN AN ADAPTIVE STREAMING ENVIRONMENT

      
Document Number 02925362
Status Pending
Filing Date 2014-09-23
Open to Public Date 2015-04-02
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Dasher, Charles
  • Robertson, Mark
  • Forsman, Robert Hammond
  • Reynolds, Jennifer Ann

Abstract

A system and method for effectuating fast channel changes in an adaptive streaming environment. When a new stream of media content is started, a client device is adapted for sending a request for transmission of media content encoded at a select bit rate. Upon receipt of the encoded media content, the client device is operative to decode and render t he media content immediately regardless of a buffer state associated with the client device's video buffer. The client device is further operative to send a request for streaming media content encoded at higher hit rates upon expiration of a specific period of time.

IPC Classes  ?

  • H04N 21/238 - Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
  • H04N 21/236 - Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator ] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream

9.

SYSTEM AND METHOD FOR MANAGING ADJACENT CHANNELS IN AN ADAPTIVE STREAMING ENVIRONMENT

      
Document Number 02925364
Status Pending
Filing Date 2014-09-23
Open to Public Date 2015-04-02
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Dasher, Charles Hammett
  • Forsman, Robert Hammond
  • Reynolds, Jennifer Ann

Abstract

A system and method for managing adjacent channels in an adaptive streaming environment. One or more adjacent channels way be defined for a client device relative to a current streaming channel, wherein the client device is configured to pre-fetch metadata and initialization information for the defined adjacent channels based on bandwidth, conditions, buffer conditions, etc. When a channel is changed, the client device is operative to use the pre-fetched data to quickly obtain encoded media content for rendering.

IPC Classes  ?

  • H04N 21/238 - Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
  • H04N 21/236 - Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator ] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream

10.

RECORDING DEVICE AND METHOD FOR EFFICIENT NETWORK PERSONAL VIDEO RECORDER MANIPULATION THROUGH ADAPTIVE BIT RATE STREAMING

      
Document Number 02925208
Status Pending
Filing Date 2014-09-23
Open to Public Date 2015-04-02
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Reynolds, Jennifer Ann

Abstract

A recording device and a method are described herein that provide a network-based personal video recording service utilizing adaptive bit rate technology for a plurality of users. In operation, the recording device records at a minimum a single bit rate (one set of segmented files) of the broadcast content within each user's network personal video recorder storage unit. Plus, the recording device stores the other bit rates (remaining sets of segmented files) in a central storage location or some other storage location.

IPC Classes  ?

11.

STREAMING POLICY MANAGEMENT SYSTEM AND METHOD

      
Document Number 02924087
Status Pending
Filing Date 2014-09-10
Open to Public Date 2015-03-19
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Dasher, Charles

Abstract

A streaming policy management system and method wherein bandwidth may be allocated based on external device information received from a streaming client device connected to one or more external audio/video (A/V) devices. When, a streaming network back office receives a request from the streaming client device for delivery of a particular content, wherein the request includes external device information of one or more external A/V devices connected to the streaming client device, a bandwidth is determined for streaming the particular content to the streaming client device and a request may be made to a content delivery network to create a distribution pipe having the bandwidth to accommodate the delivery of the particular content. A manifest file is provided to the streaming client device that includes one or more pointers that point to content segments of the particular content.

IPC Classes  ?

  • H04N 21/436 - Interfacing a local distribution network, e.g. communicating with another STB or inside the home
  • H04N 21/43 - Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronizing decoder's clock; Client middleware

12.

MEDIA DISTRIBUTION SYSTEM WITH MANIFEST-BASED ENTITLEMENT ENFORCEMENT

      
Document Number 02919105
Status In Force
Filing Date 2014-07-23
Open to Public Date 2015-01-29
Grant Date 2018-10-16
Owner ERICSSON AB (Sweden)
Inventor
  • Mikhailov, Mikhail
  • Nair, Raj

Abstract

A method for enforcing entitlements includes configuring a wide variety of entitlements at a server; determining applicable combination of entitlements for a given client request; sending entitlements to the requesting client securely; handling entitlement information securely on a plurality of client devices at run time; storing entitlement information securely on a plurality of client devices for offline use; and enforcing entitlements on a plurality of client devices. The method employs manipulation of manifest files by a proxy that may be included in the client device or located in the network.

IPC Classes  ?

  • H04N 21/441 - Acquiring end-user identification
  • H04N 21/2347 - Processing of video elementary streams, e.g. splicing of video streams or manipulating MPEG-4 scene graphs involving video stream encryption
  • G06F 21/10 - Protecting distributed programs or content, e.g. vending or licensing of copyrighted material
  • H04L 9/32 - Arrangements for secret or secure communication including means for verifying the identity or authority of a user of the system
  • H04L 12/16 - Arrangements for providing special services to substations

13.

MEDIA CLIENT DEVICE AUTHENTICATION USING HARDWARE ROOT OF TRUST

      
Document Number 02919106
Status In Force
Filing Date 2014-07-23
Open to Public Date 2015-01-29
Grant Date 2018-07-17
Owner ERICSSON AB (Sweden)
Inventor
  • Mikhailov, Mikhail
  • Nair, Raj

Abstract

A client device for media playback includes a user-installable media client application which implements the client-side of a digital rights management (DRM) system. The client device employs secure boot and verifies the user-installed application. The application is hardened against reverse engineering, and it utilizes a special API provided by the client device to tie into the secure boot, bridging the gap between the secure boot and the client-side of the DRM system contained within the application.

IPC Classes  ?

  • G06F 21/10 - Protecting distributed programs or content, e.g. vending or licensing of copyrighted material
  • G06F 21/44 - Program or device authentication
  • G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

14.

SYSTEM AND METHOD FOR DELIVERING CONTENT IN A CONTENT DELIVERY NETWORK

      
Document Number 02916791
Status Pending
Filing Date 2014-07-02
Open to Public Date 2015-01-08
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Rodgers, Jimmie

Abstract

A content delivery method and system based on popularity-driven pre- provisioning of content in a content delivery network, CDN (102, 202). In one method, a network element (118, 212, 400) may obtain (502 A) trend data, relative to a particular content to be distributed by the CDN. The network element may also obtain (502B) demographic data of subscribers serviced by the CDN. An expected popularity distribution of the particular content is forecasted (504) based on a metric derived from, at least one of the trend data and the demographic data. A push policy for pushing and/or pre-provisioning of the content to one or more nodes of the CDN is effectuated (506) at the network element based on the expected popularity distribution of the content relative to the geographical region serviced by the CDN.

IPC Classes  ?

  • G06F 15/16 - Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs

15.

BANDWITH POLICY MANAGEMENT IN A SELF-CORRECTED CONTENT DELIVERY NETWORK

      
Document Number 02916847
Status Pending
Filing Date 2014-07-02
Open to Public Date 2015-01-08
Owner ERICSSON AB (Sweden)
Inventor
  • Phillips, Chris
  • Rodgers, Jimmie

Abstract

In one embodiment of a network pipe optimization method, a network element (122, 400, 1002) may obtain (1108) at least one of a push pipe utilization report and a pull pipe utilization, report from each distribution node of a content delivery network ( 102, 202, 250). Based on the utilization reports, the network, element may determine (1114) new push pipe weights and new pull pipe weights for distribution pipes associated with each distribution, node of the content delivery network. Using at least one of the new push pipe weights and new pull pipe weights, a network pipe utilization model associated with the content delivery network may be simulated (1116), Responsive to determining (1118) that the simulated network pipe utilization model yields an improved utilization of the content delivery network, the new push pipe weights and new pull pipe weights may be distributed (1120) to each distribution node in the content delivery network.

IPC Classes  ?

  • H04L 29/06 - Communication control; Communication processing characterised by a protocol
  • H04L 12/911 - Network admission control and resource allocation, e.g. bandwidth allocation or in-call renegotiation

16.

REGULATING CONTENT STREAMS FROM A WEIGHTED FAIR QUEUING SCHEDULER USING WEIGHTS DEFINED FOR USER EQUIPMENT NODES

      
Document Number 02886313
Status In Force
Filing Date 2013-07-24
Open to Public Date 2014-03-06
Grant Date 2017-08-08
Owner ERICSSON AB (Sweden)
Inventor
  • Dasher, Charles
  • Forsman, Bob
  • Phillips, Chris
  • Reynolds, Jennifer

Abstract

Apparatuses and methods control communication of content streams through a content distribution network. A data repository (142, J40) is accessed (300) to retrieve information which identifies a group of User equipment nodes (200-214) that are registered with one of a plurality of subscriber accounts and which further identifies weight values that are associated with the group of the user equipment nodes (200-214). Communication bit rates that are provided by a weighted fair queuing scheduler node (136) to individual ones of a group of the content streams within bandwidth allocated to a virtual pipe for carrying the group of the content streams through the content: distribution network to the group of the user equipment nodes (200-214), are regulated responsive to the weight values associated with the group of the user equipment nodes (200-214).

IPC Classes  ?

  • H04L 12/813 - Policy-based control, e.g. policing
  • H04L 12/867 - Fair share scheduling
  • H04L 12/927 - Allocation of resources based on type of traffic, QoS or priority

17.

INTELLIGENT AUDIO LIMIT METHOD, SYSTEM AND NODE

      
Document Number 02591732
Status In Force
Filing Date 2007-06-15
Open to Public Date 2007-12-16
Grant Date 2015-11-10
Owner ERICSSON AB (Sweden)
Inventor
  • Huber, Richard E.
  • Punj, Arun
  • Hill, Peter D.

Abstract

A teleconferencing system includes a network. The system includes a plurality of nodes, such as terminals, communicating with each other through the network with audio streams the terminals transmit to each other to form the conference. Each terminal able to detect an overload state where there are more than a predetermined number of simultaneous audio streams being transmitted by the terminals and together with the other terminals control the number of audio streams simultaneously being transmitted to end the overload state. A method providing a teleconference. A teleconferencing node.

IPC Classes  ?

  • H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
  • H04M 1/60 - Substation equipment, e.g. for use by subscribers including speech amplifiers
  • H04N 7/15 - Conference systems
  • H04M 9/08 - Two-way loud-speaking telephone systems with means for conditioning the signal, e.g.  for suppressing echoes for one or both directions of traffic

18.

COMBATING FRAUD IN TELECOMMUNICATION SYSTEMS

      
Document Number 02632101
Status In Force
Filing Date 2006-11-30
Open to Public Date 2007-06-07
Grant Date 2013-08-06
Owner ERICSSON AB (Sweden)
Inventor Stewart, David

Abstract

A method and apparatus for combating fraudulent use of a telecommunication system by subscribers who terminate calls improperly without allowing the termination of the call to be recorded, and thereby attempt to avoid correct payment for the call. The apparatus comprises a record means for creating a call detail record (CDR) of certain events for each call on which billing for each call can be based. A modified Call Agent (22) is provided for monitoring certain events related to all calls. The Call Agent (22) is also operable to check periodically whether a call is active or has been terminated improperly without the termination event having been recorded in the respective CDR for that call. A counter means (42) is provided that is operable, in the event of the Call Agent (22) detecting that a call has been terminated improperly by a selected subscriber, to start a count, that upon reaching a predetermined value, is used to shorten the time interval between subsequent periodic checks made by the Call Agent (22) in respect of subsequent calls involving the same selected subscriber.

IPC Classes  ?

  • H04M 15/00 - Arrangements for metering, time-control or time-indication

19.

COMMUNICATIONS SYSTEM

      
Document Number 02497620
Status In Force
Filing Date 2003-10-14
Open to Public Date 2004-04-29
Grant Date 2014-12-30
Owner ERICSSON AB (Sweden)
Inventor
  • Caviglia, Diego
  • Fiaschi, Giovanni
  • Lazzeri, Francesco
  • Molinari, Mario

Abstract

A data communications system with a plurality of nodes connected by a plurality of links; in which a subset of the links and nodes form a worker path for carrying worker data through the communication system and a further subset of links and nodes provides a protection path for carrying other data in the absence of a fault in the worker path and for providing an alternative path for the worker data in the event of a fault in the worker path; in which the alternative path is predetermined by protection means prior to the detection of a fault in the worker path.

IPC Classes  ?

20.

OPTIMISING POWER IN OPTICAL COMMUNICATIONS NETWORKS

      
Document Number 02486640
Status In Force
Filing Date 2003-06-11
Open to Public Date 2003-12-18
Grant Date 2013-10-01
Owner ERICSSON AB (Sweden)
Inventor Claringburn, Harry Richard

Abstract

The relative launch power of signals at an add/drop node transponder is controlled to maximise available power. Known values of signal bandwidth and likely noise in the signal path (8), for example, derived from the system manager (24,9), are used to control (22) the launch power (23) into the optical amplifier (11), in order to optimise the launch power accordingly.

IPC Classes  ?

  • H04J 14/02 - Wavelength-division multiplex systems

21.

OPTICAL FIBER AMPLIFICATION SYSTEM

      
Document Number 02481780
Status In Force
Filing Date 2003-04-30
Open to Public Date 2003-11-13
Grant Date 2010-07-20
Owner ERICSSON AB (Sweden)
Inventor Fella, Paolo

Abstract

An optical fiber amplifier pumping technique based on multiple Stimulated Raman Scattering (SRS) for optical communication systems that comprises a plurality of pump signals with increasing wavelength which are injected into the fiber. The wavelengths of such pump signals are such that in cascade each pump signal of the plurality is amplified by the pump signal of wavelength immediately shorter while it amplifies that with wavelength immediately higher with the pump signal of highest wavelength which, in turn, pumps a remote rare earth doped optical fiber amplifier.

IPC Classes  ?

  • H04B 10/291 - Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
  • H01S 3/067 - Fibre lasers
  • H01S 3/30 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
  • H04J 14/02 - Wavelength-division multiplex systems

22.

METHOD AND ARRANGEMENT FOR DYNAMIC ALLOCATION OF NETWORK RESOURCES

      
Document Number 02479502
Status In Force
Filing Date 2003-03-28
Open to Public Date 2003-10-09
Grant Date 2012-12-18
Owner ERICSSON AB (Sweden)
Inventor Moore, Andrew

Abstract

Dynamic allocation of network resource through the use of a measurement-based estimator is described. Measurements of bandwidth utilisation allow a measurement-based estimator to compute the bandwidth requirements of the measured traffic. The use of such an estimator allows provision of differentiated services by adjusting the service-weighting of a queue scheduler and modify the depth and behaviour of buffering. By providing a dynamic allocation of resource, the technique makes possible the differentiation of diverse traffic types with a reduction in the complexity and waste of current techniques such as static-allocation or the best-effort service common in the Internet. A novel approach is described to problems arising from the desire to offer diverse and sometimes orthogonal service facilities to a wide variety of traffic types.

IPC Classes  ?

  • H04L 12/857 - Mapping QoS constraints between layers or between different networks
  • H04L 12/24 - Arrangements for maintenance or administration

23.

OPTICAL CROSS-CONNECTOR CONTAINING A MULTI-STAGE CLOS NETWORK IN WHICH A SINGLE-STAGE MATRIX COMPRISES ONE STAGE OF THE CLOS NETWORK

      
Document Number 02478869
Status In Force
Filing Date 2003-03-18
Open to Public Date 2003-10-02
Grant Date 2013-01-08
Owner ERICSSON AB (Sweden)
Inventor
  • Pichler, Olaf
  • Elbers, Joerg Peter
  • Guild, Kenneth

Abstract

A wavelength division multiplex (WDM) optical cross-connect (OXC) has a plurality (N x M) of input and output channels (iI to iM; 01 to oM) for through traffic. A first group of optical switching matrices (SI-I to SI-N) is provided for connecting the through traffic input channels (iI to iM) to the output channels (01 to oM), wherein each through traffic input channel (iI to iM) is connected to an input of a switching matrix (SI-I to SI-N) of the first group and each through traffic (01 to oM) is connected to an output of the switching matrix (S1-1 to S1-N). Additionally a plurality (P) of input channels (a1 to aP) and/or output channels (01 to oP) is provided for adding/dropping traffic. Each add/drop input/output channel (a1 to aP, o1 to oP) is connected to an input/output of a second group of switching matrices (S2~ -1 to S2~ -AD). The outputs/inputs of the second group of switching matrices are connected to inputs of a third group of switching matrices (S3-1 to S3-2M-1) or outputs of a fourth group of switching matrices (S4-1 to S4-(2M- 1)) and the outputs/inputs of the third/fourth group of switching matrices are connected to inputs/outputs of the first group of switching matrices such that the switching matrices or the second, third and first groups of the first, fourth and second groups each form a Clos network.

IPC Classes  ?

  • H04Q 3/52 - Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
  • H04Q 11/00 - Selecting arrangements for multiplex systems

24.

CONTROL OF AVALANCHE PHOTODIODES BIAS VOLTAGE

      
Document Number 02476779
Status In Force
Filing Date 2003-03-11
Open to Public Date 2003-09-25
Grant Date 2012-11-20
Owner ERICSSON AB (Sweden)
Inventor
  • Nicholls, Peter
  • Butler, Graham

Abstract

An optical communications system uses forward error correction (FEC) to correct errors in signals carried by the system. Optical signals on the system are dropped at nodes and converted to electrical signals by avalanche photodiodes (APDs) at the node receivers. A FEC chip operates on the electrical signal to correct errors. The error rate is used to control the APD bias voltage which affects signal noise and therefore, error rate. The errors in a predetermined interval are counted and a determination made as to whether the error rate is rising with time. The bias voltage is derived from the value of a counter whose count is incremented each interval. If the error rate is rising, the counting direction is changed.

IPC Classes  ?

  • H04B 10/69 - Electrical arrangements in the receiver
  • H01L 31/107 - Devices sensitive to infra-red, visible or ultra-violet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode

25.

PORT LABEL SWITCHING

      
Document Number 02474519
Status In Force
Filing Date 2003-02-11
Open to Public Date 2003-08-21
Grant Date 2010-07-27
Owner ERICSSON AB (Sweden)
Inventor
  • Chopping, Geoffrey
  • Maddern, Thomas Slade

Abstract

A communications switch comprising, a plurality of numerically identified input traffic ports, a plurality of numerically identified output traffic ports, at least one significant label extraction means and at least one numerical processor, the communications switch being arranged whereby each message entering the communication switch by a numerically identified input traffic port contains a header, which header contains a label stack, which label stack includes at least one valid label, of which one valid label is a significant label and wherein the numerical value of the significant label contained within the header of a particular message which entered the communications switch via a particular numerically identified input traffic port is extracted by one of the least one significant label extraction means and is supplied to one of the at least one numerical processors which numerical processor uses the significant label of the particular message and the numerical value of the particular numerically identified input traffic port to form a numerical result which directly equates to the number of the numerically identified output traffic port by which said particular messages leaves the communications switch and wherein the numerical result is equal to the modulo addition of the numerical value of the significant label and the numerical value of said particular numerically identified input traffic port.

IPC Classes  ?

  • H04L 12/947 - Address processing within a device, e.g. using internal ID or tags for routing within a switch
  • H04L 12/44 - Star or tree networks
  • H04L 29/06 - Communication control; Communication processing characterised by a protocol

26.

COMMUNICATIONS SYSTEM

      
Document Number 02472980
Status In Force
Filing Date 2003-01-31
Open to Public Date 2003-08-07
Grant Date 2010-10-26
Owner ERICSSON AB (Sweden)
Inventor
  • Lanzone, Sergio
  • Toscano, Orazio

Abstract

The present invention consists of an information structure conceived for the transport of data in digital form from a transmitting element to a receiver. This structure calls for fields for transport of the data and heading information fields termed "overhead" which improve transmission reliability. This structure, termed frame, allows in particular support of digital interconnections in a element of a transport network capable of switching various traffic types such as CBRx (for example STM-N e OC-N), VC-N, STS-N or ODUk. The structure also comprises means for identification of the frame beginning, verification of the integrity and correctness of the switching, support of protection switching, and transport of quality and timing information associated with the switched entities.

IPC Classes  ?

  • H04J 3/16 - Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted

27.

COMMUNICATION NETWORK

      
Document Number 02472571
Status In Force
Filing Date 2002-12-16
Open to Public Date 2003-07-10
Grant Date 2010-06-22
Owner ERICSSON AB (Sweden)
Inventor
  • Maddern, Thomas Slade
  • Proctor, Richard John
  • Chopping, Geoffrey
  • Branfield, Henry Anthony
  • Scott, David Ian

Abstract

A network has a plurality of nodes, wherein at least one of the plurality of nodes includes a switching means arranged to carry out a Simple Transit Core Function and three or more of the plurality of nodes include a Single Link Interface which Single Link Interface has associated Output Attributes and/or Input Cognisant Attributes where each Simple Transit Core Function at one node is not logically connected to another Simple Transit Core Function at another node and each Simple Transit Core Function at one node is logically connected to at least three Single Link Interfaces at other nodes and wherein the nodes including Single Link Interfaces which are connected to one instance of a node arranged to carry out a Simple Transit Core Function are controlled by respective Intercommunicating Connection Acceptance Control Processes according to the respective Output Attributes and/or Input Cognisant Attributes.

IPC Classes  ?

28.

NOISE REDUCTION IN OPTICAL COMMUNICATIONS NETWORKS

      
Document Number 02472322
Status In Force
Filing Date 2002-12-17
Open to Public Date 2003-07-10
Grant Date 2012-02-14
Owner ERICSSON AB (Sweden)
Inventor
  • Claringburn, Harry Richard
  • Sharratt, Michael

Abstract

The add path of a DWDM add/drop node comprises a n:1 coupler for combining n signal sources. The combined signal is amplified and then demultiplexed. Each output of the demultiplexer is passed through a variable optical attenuator (VOA) and the VOA outputs multiplexed to form the add signal. Channels carrying no add signal and not used to control the added signals are attenuated to zero to remove a broadband noise contribution from those channels. The signal sources are run at maximum power and the signal of those channels attenuated by the respective VOAs to control their amplitude and optimise the optical signal to noise ratio of the add signal.

IPC Classes  ?

  • H04J 14/02 - Wavelength-division multiplex systems

29.

COMMUNICATIONS NETWORKS

      
Document Number 02461273
Status In Force
Filing Date 2002-10-04
Open to Public Date 2003-04-10
Grant Date 2014-09-16
Owner ERICSSON AB (Sweden)
Inventor
  • Hartshorne, Paul
  • Munns, Jonathan
  • Hunneyball, Timothy

Abstract

In order to upgrade firmware at network elements in a communications network, a Network Upgrade protocol Agent is installed on each network element. These agents run an upgrade protocol which allows an upgrade to be loaded onto a first network element and then broadcast through the netwrok. The protocol includes Notification messages, which change the state of the network elements to which the upgrade relates, download messages which include the firmware upgrade, apply messages which instruct relevant network elements to apply the upgrade, and inventory messages which sent an inventory of firmware stored at a network element to neighbouring elements to enable a determination to be made of whether a network element has received all relevant firmware upgrades.

IPC Classes  ?

  • H04L 12/24 - Arrangements for maintenance or administration
  • H04H 20/91 - Arrangements characterised by special technical features of the broadcast information, e.g. signal form or information format broadcasting computer programmes
  • G06F 9/445 - Program loading or initiating

30.

CLIENT SERVER NETWORKS

      
Document Number 02459575
Status In Force
Filing Date 2002-09-18
Open to Public Date 2003-03-27
Grant Date 2012-07-24
Owner ERICSSON AB (Sweden)
Inventor Martin, Stephen Ian

Abstract

A client node in a network communicates with a server system comprising a plurality of servers. The client comprises a distributor which periodically measures server activity, assesses relative loading of the servers and adjusts the request distribution, and therefore the server loadings in accordance with the loading assessment.

IPC Classes  ?

  • H04L 29/06 - Communication control; Communication processing characterised by a protocol
  • G06F 9/50 - Allocation of resources, e.g. of the central processing unit [CPU]

31.

MOBILE PHONE TELEPHONY

      
Document Number 02457866
Status In Force
Filing Date 2002-08-23
Open to Public Date 2003-03-13
Grant Date 2013-01-22
Owner ERICSSON AB (Sweden)
Inventor
  • Hosie, Nadia
  • Benham, Mary
  • Babbage, Henry John
  • Martin, Stephen Ian

Abstract

A method of operating a mobile phone telecommunications network (1) is provided, comprising using at least one mobile switching centre (MSC) (2) of the network to receive at least one message, and as a result to generate a mobile application part (MAP) message, transmitting the MAP message from the MSC (2) to at least one service control point (SCP) (3) of the network, and operating the SCP (3) to process the MAP message. Processing of the MAP message by the SCP (3) may comprise, for example, determining the subsequent handling of the MAP message, charging a sender of the message received by the MSC. The message received by the MSC (2) may comprise a text message, for example a text message generated using the short message service (SMS).

IPC Classes  ?

  • H04W 4/12 - Messaging; Mailboxes; Announcements
  • H04W 4/14 - Short messaging services, e.g. short message service [SMS] or unstructured supplementary service data [USSD]

32.

COMMUNICATIONS NETWORK

      
Document Number 02454404
Status In Force
Filing Date 2002-08-09
Open to Public Date 2003-02-20
Grant Date 2012-02-14
Owner ERICSSON AB (Sweden)
Inventor
  • Lanzone, Sergio
  • Toscano, Orazio

Abstract

A method for protection of STM-n/OC-n clear channel connections calls for a protection diagram allowing protection of STM-n/OC-n clear channel signals transmitted from a source point to a destination point. This protection allows overcoming a fall along the path between source point and destination point. It can be used in different types of network structure, for example "ring" or "mesh". The method calls for duplication of STM-n/OC-n signals at the transmitting end of the subnetwork and transmission over two different routes which can be defined work subnetwork and protection subnetwork. To ensure success of the protection diagram the work and protection channels follow different routes. At the receiving end the signal is selected from the work path or the protection path depending on the quality of the received signals, the protection state and the external commands.

IPC Classes  ?

  • H04J 3/14 - Monitoring arrangements
  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing

33.

TELECOMMUNICATIONS NETWORK

      
Document Number 02456086
Status In Force
Filing Date 2002-08-09
Open to Public Date 2003-02-20
Grant Date 2010-01-12
Owner ERICSSON AB (Sweden)
Inventor
  • Lanzone, Sergio
  • Toscano, Orazio

Abstract

A method for generation of a clock synchronized with time references derived from input signals in an apparatus of a telecommunications network comprising an input part receiving the input signals and a part for treatment of said input signals is described. In the input part the method comprises the steps of deriving the time reference signals from the input signals, reading an edge of the reference signals, establishing the position of this edge relative to the internal data frame, inserting in the frame heading a pointer representing the established position of the edge relative to the frame and sending the frame to the treatment part. In the treatment part the method comprises the steps of receiving the frame, extracting said pointer, generating said time reference clock and synchronizing it with the position in the frame indicated by the pointer. An apparatus applying this method is also proposed.

IPC Classes  ?

34.

ETHERNET PROTECTION SYSTEM

      
Document Number 02446239
Status In Force
Filing Date 2002-06-05
Open to Public Date 2002-12-12
Grant Date 2011-04-19
Owner ERICSSON AB (Sweden)
Inventor
  • Tornar, Massimiliano
  • Leroux, Andre

Abstract

An Ethernet protection system includes an Ethernet communication device operable to be connected to first and second Ethernet lines forming a parallel connection. The Ethernet communication device is able to select the first Ethernet line and transmit and receive data over the first Ethernet line, and upon detecting a fail ure in the first Ethernet line, automatically selelct the second Ethernet line and transmit and receive data over the second Ethernet line.

IPC Classes  ?

  • H04L 29/14 - Counter-measures to a fault
  • H04B 1/74 - TRANSMISSION - Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
  • H04L 12/44 - Star or tree networks
  • H04L 12/56 - Packet switching systems

35.

SYSTEM AND METHOD FOR TRANSPORTING CHANNELIZED ETHERNET OVER SONET/SDH

      
Document Number 02446671
Status In Force
Filing Date 2002-06-06
Open to Public Date 2002-12-12
Grant Date 2010-05-11
Owner ERICSSON AB (Sweden)
Inventor
  • Duplessis, Luc
  • Leroux, Andre

Abstract

A system for transporting traffic is provided. The system transports traffic from a first network access path (L1) over a transport network path (L2) having multiple channels and transports traffic from a second network access path (L3) over the same transport network path (TP1). The system transports the traffic using transport network path channels wherein the bandwidth of the first network access path is higher than the capacity of any of the transport network path channels and wherein the bandwidth of the second network access path is higher than the capacity of any of the transport network path channels. The system allocates a first quantity of the transport network path channels for transporting traffic from the first network access path. The system allocates a second quantity of the transport network path channels for transporting traffic from the second network access path. And, the sum of the first quantity plus the second quantity is less than or equal to the total number of channels in the transport network path.

IPC Classes  ?

  • H04J 3/16 - Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
  • H04J 3/22 - Time-division multiplex systems in which the sources have different rates or codes
  • H04L 12/46 - Interconnection of networks
  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing

36.

SIGNAL ADDITION TO A WAVE DIVISION MULTIPLEX SYSTEM

      
Document Number 02440442
Status In Force
Filing Date 2002-02-11
Open to Public Date 2002-11-21
Grant Date 2012-05-01
Owner ERICSSON AB (Sweden)
Inventor Goodfellow, Robert Charles

Abstract

A telecommunications system is formed from a single mode optical fibre carrying Wave Division Multiplex (WDM) traffic, there being a transmission fibre coupler arranged to couple signals from channels to be added to the single mode optical fibre. There are also coupling means to connect the channels carrying the signals to be added to the input of an optical amplifier, the output of the amplifier being connected in series to the transmission fibre coupler by a switchable multiband band-stop filter arranged to pass only signals having the wavelength of a signal or signals to be added to the WDM traffic. The switchable multiband band-stop filter may be a fibre Bragg filter, a selectable stack of filters or an assembly of bleachable filters. A switchable multiband filter is formed from a stack of layers of a semiconductor bleachable medium whereby the bleaching threshold is that of each single layer and the attenuation is the sum of the transmissions through all the layers comprising the stack.

IPC Classes  ?

  • H04J 14/02 - Wavelength-division multiplex systems
  • G02B 6/34 - Optical coupling means utilising prism or grating
  • G02B 26/00 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
  • G02F 1/017 - Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells
  • H04B 10/213 - using a T-type coupler
  • H04Q 11/00 - Selecting arrangements for multiplex systems
  • G02B 6/12 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind

37.

METHOD FOR DISTRIBUTED MULTICAST ROUTING IN CONNECTION-ORIENTED NETWORKS AND NETWORK FOR APPLYING THIS METHOD

      
Document Number 02445286
Status In Force
Filing Date 2002-05-03
Open to Public Date 2002-11-14
Grant Date 2011-07-05
Owner ERICSSON AB (Sweden)
Inventor
  • Caviglia, Diego
  • Fiaschi, Giovanni
  • Lazzeri, Francesco

Abstract

A method for multicast routing for a telecommunications network comprising a plurality of communication nodes interconnected by multiple paths, for the establishment of a multicasting connection between a source node and a plurality of destination nodes, in which the destination nodes are informed that a multicast connection request is arriving from a particular source. Each destination node then sends a connection request to the source, and these requests are processed and relayed by each node within the network. The requests are propagated from node to node until they reach the source node, carrying the information on the cost accumulated along the path. Finally, the source node, having received the information on the costs of the possible paths, selects the path which has a satisfactory cost.

IPC Classes  ?

  • H04L 12/18 - Arrangements for providing special services to substations for broadcast or conference

38.

A TRANSMISSION METHOD

      
Document Number 02443942
Status In Force
Filing Date 2002-04-29
Open to Public Date 2002-11-07
Grant Date 2009-01-20
Owner ERICSSON AB (Sweden)
Inventor
  • Abbas, Ghani Abdul Muttalib
  • Ash, John David

Abstract

A transmission method in which a first signal frame, carrying a payload in a first part of the signal frame and second information in a second part of the signal frame, is transmitted intact between a signal source and a signal destination by copying the second information into the first part of at least one additional signal frame, transmitting both frames between the signal source and the signal destination and, at the destination, reconstructing the first signal frame by retrieving its original second information from the first part or parts of the additional signal frame or frames and placing the retrieved second information in the second part of the first signal frame. A typical application of the transmission method lies in its use in an SDH transmission system.

IPC Classes  ?

  • H04J 3/16 - Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted

39.

IMPROVEMENTS IN AND RELATING TO TELECOMMUNICATIONS NETWORKS

      
Document Number 02443017
Status In Force
Filing Date 2002-04-25
Open to Public Date 2002-11-07
Grant Date 2010-06-29
Owner ERICSSON AB (Sweden)
Inventor Hunneyball, Timothy John

Abstract

A telecommunications network comprising an SDH ring (9) of a plurality of interconnected MPLS (Multi Protocol Label Switching) enabled network devices (2) (SONET / SDH / WDM multiplexers) is configured to support both central and distributed network / routing protocols. Central management of the network is effected by a central management terminal (1) by means of OSI protocols run over a first data communications network (DCN) (5) of embedded Data Communications Channels (DCCS) (5), (5a). Distributed management of the network is performed by means of MPLS / IP protocols run over a second data communications network (DCN) (6) of embedded Data Communication Channels (DCCS) (6), (6a), (6b), (6c), (6d). The topologies of the two DCNs (5), (6) are different. The central management DCN (5) extends (link 5a) to the central management terminal (1) via an Ethernet interface, whereas the distributively managed DCN (6) is blocked at the interface. Data devices (3), in the form of MPLS enabled switches or routers, are connected to the SDH ring (9). The distributed control DCN (6) extends (links 6a, 6b, 6c, 6d) to the data devices (3a), (3b), (3c), (3d), whereas the centrally controlled DCN (5) is prevented from extending to the devices (3). Thus an existing legacy optical network may be converted so as to run two DCNs in parallel, the first DCN (5) supporting OSI protocols (in a centrally managed environment) and the second DCN (6) supporting GMPLS (Generalised MPLS) protocols that strictly follow data traffic.

IPC Classes  ?

  • H04L 12/24 - Arrangements for maintenance or administration
  • H04L 12/56 - Packet switching systems
  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing

40.

NETWORK TUNNELLING

      
Document Number 02441271
Status In Force
Filing Date 2002-03-12
Open to Public Date 2002-10-03
Grant Date 2010-10-26
Owner ERICSSON AB (Sweden)
Inventor
  • Hardy, William Geoffrey
  • Grandi, Vittoriano

Abstract

MPLS labels can be used to tunnel data packets through IP networks. At a start point such as a router or network terminator, the IP destination address is examined and one or more labels generated which relate to the topology of the network. The labels can include QoS information. The packet is then sent to the destination via a label switched path. At the destination the packet may be sent on via a further label switched path by examining the IP address from the received label and generating on or more fresh labels for the passage of the packet though the further label switched path.

IPC Classes  ?

  • H04L 12/723 - Label or tag based routing, e.g. multi-protocol label switching [MPLS] or generalised multi-protocol label switching [GMPLS]

41.

ACCESS NETWORKS

      
Document Number 02441784
Status In Force
Filing Date 2002-03-12
Open to Public Date 2002-10-03
Grant Date 2011-05-17
Owner ERICSSON AB (Sweden)
Inventor
  • Hardy, William Geoffrey
  • Grandi, Vittoriano

Abstract

In order to enable access network to use private IP addresses, and so reduce public IP address overheads, data packets are tunnelled though the access network using one of a number of methods including, using layer 2 transmission protocol between a LAC and a LNS and using label switch paths based on MPLS labels.

IPC Classes  ?

  • H04L 29/12 - Arrangements, apparatus, circuits or systems, not covered by a single one of groups characterised by the data terminal
  • H04L 12/46 - Interconnection of networks
  • H04L 12/56 - Packet switching systems

42.

CONNECTION-ORIENTED COMMUNICATION NETWORK AND METHOD OF OPERATING

      
Document Number 02439726
Status In Force
Filing Date 2002-03-06
Open to Public Date 2002-09-19
Grant Date 2011-01-04
Owner ERICSSON AB (Sweden)
Inventor Barker, Andrew James

Abstract

A first Multi Protocol Label Switching (MPLS) enabled Internet Protocol (IP) data network (11) is able to transmit data to a second MPLS enabled IP network (13) via a legacy optical network (12), which would not otherwise be able to handle the user network interface (UNI) protocols required to be used within an MPLS network environment, by means of configuring the legacy optical network (12) and its traditional network management system (16) (TNMS) so that they simulate or emulate an MPLS enabled optical network. The simulation/emulation of an MPLS network is performed as follows: when a first legacy network element (NE) (14a) receives a connection request (a UNI request) from the MPLS network (11) under a UNI protocol, the UNI request is passed (arrow A) to the TNMS (16), which then sets (arrows B) the required connection across the legacy network (12) via a second edge NE (14b) to an NE of the second IP network (13). Once the connection has been set the TNMS (16) instructs (arrow C) the edge NE (14a) to send a return signal to the requesting network (11) indicating that the connection has been successfully set. Data packets may then be transmitted across the network (11, 12, 13).

IPC Classes  ?

  • H04L 12/28 - Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
  • H04L 12/46 - Interconnection of networks
  • H04L 12/56 - Packet switching systems
  • H04Q 11/00 - Selecting arrangements for multiplex systems

43.

COMMUNICATIONS NETWORK

      
Document Number 02439035
Status In Force
Filing Date 2002-03-06
Open to Public Date 2002-09-12
Grant Date 2009-06-02
Owner ERICSSON AB (Sweden)
Inventor Barker, Andrew James

Abstract

A communications network that can determine for itself its own network topology, that is the identity and interconnection of nodes comprising the network is described. The network comprises a plurality of nodes (A to E) each having at least one port (A1 to E1), the ports being interconnected (7 to 13) in accordance with the network topology and in which communication traffic is conveyed over the network via the interconnected ports. Each port is arranged to transmit first information (h to u) within the communication traffic including the identity of the port (Section trace identity) from which the communication traffic originates. Means are provided which are arranged to transmit second information between nodes identifying which first information identity relates to which node and which port; and processing means arranged for determining for each node from the first and second information, the identity of adjacent node/s and the identity of the port/s to which its ports are connected.

IPC Classes  ?

  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing

44.

REGULATING RADIATION COMPONENT POWER IN WAVELENGTH DIVISION MULTIPLEXED OPTICAL COMMUNICATION SYSTEMS

      
Document Number 02438332
Status In Force
Filing Date 2002-02-12
Open to Public Date 2002-08-29
Grant Date 2012-05-01
Owner ERICSSON AB (Sweden)
Inventor
  • Fielding, John Richard
  • French, Graham Ronald

Abstract

There is provided a method of, and apparatus for, regulating radiation component (wavelength channel) power in a wavelength division multiplexed (WDM) optical communications system. The system comprises a plurality of nodes interconnected through optical waveguides (optical fibers). The method is characterised by: passing one or more tokens around the system from node to node; adjusting nodal settings, such as optical attenuation, applied at each node to regulate the power of WDM radiation components at the node in response to receiving one or more tokens; and repeating the method until WDM radiation component power within the system is substantially regulated.

IPC Classes  ?

  • H04J 14/02 - Wavelength-division multiplex systems
  • H04B 10/08 - Equipment for monitoring, testing or fault measuring
  • H04B 10/20 - Arrangements for networking, e.g. bus or star coupling

45.

ALARM SIGNAL SUPPRESSION IN TELECOMMUNICATIONS NETWORKS

      
Document Number 02434890
Status In Force
Filing Date 2002-01-16
Open to Public Date 2002-07-25
Grant Date 2010-08-03
Owner ERICSSON AB (Sweden)
Inventor Barker, Andrew James

Abstract

In a synchronous communications network such as SDH or SONET, traffic signals can be tagged to indicate that a fault condition has already been identified and reported. On examination of the alarm tag at subsequent stages, an alarm is suppressed if the tag indicates that the fault has already been reported.

IPC Classes  ?

  • H04J 3/14 - Monitoring arrangements
  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing

46.

DIGITAL CROSS-CONNECT

      
Document Number 02431691
Status In Force
Filing Date 2001-12-21
Open to Public Date 2002-07-11
Grant Date 2011-12-06
Owner ERICSSON AB (Sweden)
Inventor
  • Lanzone, Sergio
  • Damele, Agostino
  • Abbas, Ghani

Abstract

A digital cross-connect (DXC) (10) comprises: a plurality of ports (30-100) for receiving/outputting signals and switching and switching means (20) for selectively cross-connecting signals applied to one port to one or more other ports. The cross-connect (10) is characterized in that the switching means (20) comprises a single switching matrix which is arranged to be capable of switching Optical Data Units (ODU). Alternatively or in addition the switching matrix is arranged to be capable of transparently switching complete Synchronous Digital Hierarchy (SDH) synchronous transport modules STM-N and/or complete SONET synchronous transport transport signal STS-N derived from optical carriers OC-N and/or SDH vitual containers VC-3, VC-4, and/or concatenated virtual containers VC-4-nc where n=4, 16, 64 or 256 as defined in ITU-T Recommendation G.707 and/or SONET synchronous transport system STS-1s, STS-nc where n=3, 12, 48, 192 or 768 as defined in Telcordia GR253.

IPC Classes  ?

  • H04Q 11/00 - Selecting arrangements for multiplex systems
  • H04J 3/16 - Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
  • H04L 12/56 - Packet switching systems
  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing

47.

METHOD AND APPARATUS TO CONTROL HANDOFF BETWEEN DIFFERENT WIRELESS SYSTEMS

      
Document Number 02430869
Status In Force
Filing Date 2001-11-07
Open to Public Date 2002-06-13
Grant Date 2011-02-22
Owner ERICSSON AB (Sweden)
Inventor
  • Morales, Linda
  • Wu, Geng
  • Ahmad, Azeem
  • Paranchych, David W.
  • Vasudevan, Mini
  • Higashi, Yusuke

Abstract

A wireless communications network (10) includes a first base station system (40) that performs wireless communications according to a first protocol (e.g., 1xEV-DO protocol) and a second base station system (14) that performs wireless communications according to a second, different protocol (e.g., IS- 2000). A link is provided between the first and second base station systems (40, 14) to enable a network-initiated handoff procedure. If a source base station systems detects that a handoff of a mobile station to a target base station system is required, the source base station system exchanges messaging over the link with the target base station system to perform the handoff. In one example, the handoff is a hard handoff.

IPC Classes  ?

  • H04W 36/14 - Reselecting a network or an air interface
  • H04W 36/38 - Reselection control by fixed network equipment
  • H04L 12/56 - Packet switching systems

48.

OPTICAL TRANSMISSION SYSTEM

      
Document Number 02423625
Status In Force
Filing Date 2001-09-28
Open to Public Date 2002-04-11
Grant Date 2009-11-24
Owner ERICSSON AB (Sweden)
Inventor
  • Ghiggino, Pierpaolo
  • Palagi, Alfredo

Abstract

In an optical data transmission system, high frequency pulsed optical signals are transmitted along an optical fibre. These pulses are attenuated and distorted by transmission over long optical fibres, making detection of data difficult at the receiving end. The allowable pulse profile is determined by an eye diagram, and the invention uses an eye diagram which is non-symmetrical with respect to logic 1 and 0 levels. By positioning the eye diagram closer to the logic 0 level, detection in the presence of noise introduced during transmission of the optical pulses, can be significantly improved.

IPC Classes  ?

  • H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks

49.

SYSTEMS AND METHOD FOR INTERACTING WITH USERS OVER A COMMUNICATIONS NETWORK

      
Document Number 02420925
Status In Force
Filing Date 2001-08-31
Open to Public Date 2002-03-07
Grant Date 2010-11-30
Owner ERICSSON AB (Sweden)
Inventor
  • Barone, Samuel T. Jr.
  • Smith, Drake

Abstract

A system and method for efficiently and quickly handling content and transaction requests from various users at respective end terminals (25). According to embodiments of the invention, plural servers (34) are provided at the web site to randomly receive requests from users over a communications network, such as the Internet (21). Each server (34) contains a memory, such as a cache or disk storage process, that contains a copy of all data contained on every other server. When a request comes in to one of the servers (34), in addition to processing the request, that server broadcasts data corresponding to the request to the other servers, which are programmed to store the same request data in their respective local memories. Such broadcasts may be preferably carried out over a back-end, private network (36).

IPC Classes  ?

  • H04N 21/23 - Processing of content or additional data; Elementary server operations; Server middleware

50.

OPTICAL TRANSMISSION SYSTEM

      
Document Number 02419539
Status In Force
Filing Date 2001-08-02
Open to Public Date 2002-02-21
Grant Date 2009-03-10
Owner ERICSSON AB (Sweden)
Inventor
  • Poti, Luca
  • Bogoni, Antonella

Abstract

A device wavelength division multiplex optical transmission system has the wavelengths of the optical carriers arranged so as to reduce the effect of in- band crosstalk which results from unwanted side bands to the carriers. Possible wavelengths are placed on an equally spaced wavelength grid, and the transmitted channels are organised into groups of three each of which is placed on four adjacent grid positions, one of which is unused. Adjacent groups are spaced apart by two or more vacant grid positions.

IPC Classes  ?

  • H04J 14/02 - Wavelength-division multiplex systems
  • H04B 10/18 - Arrangements for reducing or eliminating distortion or dispersion, e.g. equalisers

51.

WAVELENGTH DIVISION MULTIPLEX (WDM) OPTICAL NETWORK

      
Document Number 02417126
Status In Force
Filing Date 2001-07-26
Open to Public Date 2002-02-07
Grant Date 2009-02-03
Owner ERICSSON AB (Sweden)
Inventor
  • Cush, Rosemary
  • Wood, Nigel

Abstract

A wavelength division multiplex (WDM) optical network comprises a ring configuration of optical fiber links (4a-4f) connecting a plurality of nodes (2a-2f) and add (8) and drop (10) filters at each node (2a-2f) connected in series within the ring. One or more of said (8, 10) filters are arranged to add or drop at least two selected adjacent wavelength channels (.lambda.N, .lambda.M) of the WDM optical signal whilst allowing the remainder of the channels within the WDM signal to pass substantially unattenuated. The wavelength channels of each node are selected such as to maximise the number of adjacent wavelength channels at each node.

IPC Classes  ?

  • H04J 14/02 - Wavelength-division multiplex systems

52.

PROTECTED ETHERNET BACKPLANE COMMUNICATION

      
Document Number 02417666
Status In Force
Filing Date 2001-07-02
Open to Public Date 2002-02-07
Grant Date 2006-05-09
Owner ERICSSON AB (Sweden)
Inventor Dubreuil, Claude

Abstract

A multiprocessor system is provided that has a plurality of processor modules coupled together via a backplane. The system comprises a first processor module having a first processor and a first switch with a plurality of I/O ports and a plurality of communication paths coupled to the I/O ports of the first switch, the first switch being operable to route data packets. The system further comprises a second processor module having a second processor and a second switch with a plurality of I/O ports and a plurality of communication paths coupled to the I/O ports of the second switch, the second switch being operable to route data packets. The system also comprises a third processor module having a third processor and a first communication device that is operable to communicate with the first switch via a first communication path on the backplane and operable to communicate with the second switch via a second communication path on the backplane. In addition, the system comprises a fourth processor module having a fourth processor and a second communication device that is operable to communicate with the first switch via a third communication path on the backplane and operable to communicate with the second switch via a fourth communication path on the backplane. The first switch is operable to route data packets from one of the first, second, third or fourth processors to another of the first, second, third or fourth processors. The second switch is also operable to route data packets from one of the first, second, third or fourth processors to another of the first, second, third or fourth processors.

IPC Classes  ?

  • G06F 13/38 - Information transfer, e.g. on bus
  • G06F 13/40 - Bus structure
  • G06F 15/17 - Interprocessor communication using an input/output type connection, e.g. channel, I/O port

53.

SYSTEM AND METHOD FOR CONTROLLING NETWORK ELEMENTS USING SOFTKEYS

      
Document Number 02412430
Status In Force
Filing Date 2001-06-06
Open to Public Date 2001-12-13
Grant Date 2008-02-26
Owner ERICSSON AB (Sweden)
Inventor
  • Jussy, Isabelle
  • Desmarais, Bernard
  • Fortier, Michel

Abstract

A system for enabling the use of network features in a network element is provided. The system comprises a softkey assignment system that is operable to perform operations with respect to at least one softkey, the softkey assignment system being operable to assign a softkey value to the softkey and to update the softkey status to an assigned state upon the assignment of a softkey value to the softkey, the softkey assignment system also being operable to update the softkey status to an unassigned state upon the receipt of a deactivated softkey value for the softkey. The system also comprises a network element. The network element comprises a service module and a softkey validation system. The service module provides a first network features that may be optionally enabled or disabled. The softkey validation is operable to enable the use of the first network feature when a received softkey value is the same as a first valid softkey value. The softkey validation system is also operable to enable the use of the first network feature a second time, after the first network feature has been deactivated, when the received softkey value is the same as a second valid softkey value, wherein the first valid softkey value is not the same as the second valid softkey value.

IPC Classes  ?

  • H04L 29/06 - Communication control; Communication processing characterised by a protocol
  • H04L 9/14 - Arrangements for secret or secure communication using a plurality of keys or algorithms
  • H04L 9/32 - Arrangements for secret or secure communication including means for verifying the identity or authority of a user of the system
  • H04L 12/24 - Arrangements for maintenance or administration

54.

A RADIO TELECOMMUNICATIONS SYSTEM AND METHOD OF OPERATING THE SAME WITH REDUCED DELAYS FOR DATA TRANSMISSION OVER A RADIO INTERFACE

      
Document Number 02405100
Status In Force
Filing Date 2001-04-19
Open to Public Date 2001-11-01
Grant Date 2010-10-26
Owner ERICSSON AB (Canada)
Inventor
  • Du Crest, Gilles
  • Cayla, Stephane

Abstract

A radio telecommunications system and method of operating the same is described which provides a reduce delay for transfer of packet data. Before a data transmission is released in one direction (uplink or downlink) a channel is reserved in the other direction. The channel reservation may be held for a certain period of time, e.g. 5 seconds after which the channel is released. The present invention is particularly useful when there is a large asymmetry in data transfer between uplink and downlink.

IPC Classes  ?

55.

MULTI-CARRIER ARRANGEMENT FOR HIGH SPEED DATA

      
Document Number 02397897
Status In Force
Filing Date 2001-01-19
Open to Public Date 2001-07-26
Grant Date 2012-08-14
Owner ERICSSON AB (Sweden)
Inventor
  • Tong, Wen
  • Periyalwar, Shalini S.
  • Strawczynski, Leo L.
  • Royer, Claude

Abstract

The system and method of the present invention uses a plurality of carriers by assigning user terminals to the plurality of carriers so that a minimum grade of service is met and so that throughput is maximized. Each serviced user terminal reports the channel quality of each of a plurality of carriers to a servicing base station(s). The reported channel qualities are then converted to maximum supported data rates for each of the user terminals and each of the carriers. These data rates are then used to allocate data service levels and data rates for each of the user terminals so that a minimum grade of service is met for each of the user terminals. Forward link transmissions, e.g., frames/data packets carried on forward channels (F-CHs), are then constructed and transmitted to meet the allocations.

IPC Classes  ?

  • H04W 28/06 - Optimising, e.g. header compression, information sizing
  • H04W 72/12 - Wireless traffic scheduling
  • H04W 88/08 - Access point devices
  • H04J 3/16 - Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted

56.

SYSTEM AND METHOD FOR PACKET TRANSPORT IN A RING NETWORK

      
Document Number 02382746
Status In Force
Filing Date 2000-07-28
Open to Public Date 2001-03-01
Grant Date 2008-05-06
Owner ERICSSON AB (Sweden)
Inventor Dupont, Jean-Lou

Abstract

A system and method for transporting data packets in a ring network includes a plurality of network nodes having a protection switching agent and at least one fast downstream path circuit that provides a low-latency packet cut-through function for forwarding packets from an upstream node to a downstream node. The network nodes include three interfaces, two interfaces for coupling the network node to other network nodes in the ring network, and a third interface for coupling the network node to a local node. A plurality of virtual paths are provided between a data packet gateway, such as an Internet gateway, and the local nodes that are coupled to the network nodes of the ring network. A virtual channel identifier is embedded within data packets transported on the network so that the protection switching agent in each network node can determine whether to route received data packets to the local node, or to the low-latency cut-through downstream path circuit.

IPC Classes  ?

  • H04J 3/16 - Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
  • H04J 3/08 - Intermediate station arrangements, e.g. for branching, for tapping-off
  • H04L 12/437 - Ring fault isolation or reconfiguration
  • H04L 12/56 - Packet switching systems

57.

TRANSMITTER-BASED PATH PROTECTION SWITCHING IN A RING NETWORK

      
Document Number 02375818
Status In Force
Filing Date 2000-05-23
Open to Public Date 2000-12-07
Grant Date 2004-02-24
Owner ERICSSON AB (Sweden)
Inventor Dupont, Jean-Lou

Abstract

(57) Abstract: A system and method for path protection switching in ring networks is provided in which the path protection switch occurs at the transmitter node that initiated a particular virtual channel of data packets onto the ring network. A failure in one of the data communication paths of the ring network is detected by the network nodes on either side of the failure. These network nodes then initiate a wrap mechanism that embeds a special feedback wrap indicator flag into packets received at the two nodes, and then wraps (or transmits back) these packets (with the feedback indicator) in the opposite direction towards the transmitter node that initiated the packets onto the ring. Each transmitter node detects whether received packets are associated with virtual channels that it initiated onto the ring, and if so detected, then determine whether the feedback indicator flag is set. If so, then a protection switch occurs at the transmitter node so that additional packets associated with the particular virtual channel are switched in a direction opposite to the failure. A ring continuity mechanism is used to determine when to revert the transmitter nodes back to their prior operating state, and a garbage collection function is also included.

IPC Classes  ?

  • H04L 12/437 - Ring fault isolation or reconfiguration

58.

RATE MATCHING AND CHANNEL INTERLEAVING FOR A COMMUNICATIONS SYSTEM

      
Document Number 02268853
Status In Force
Filing Date 1999-04-13
Open to Public Date 2000-10-13
Grant Date 2011-08-02
Owner ERICSSON AB (Sweden)
Inventor
  • Tong, Wen
  • Gauthier, Catherine
  • Gosne, Stephane

Abstract

A method of and apparatus for matching a rate of data bits, in a matrix of data bits interleaved by a predetermined interleaving process, to a desired rate by deletion of redundant data bits or repetition of data bits derived from the matrix, includes steps of determining in a non-interleaved matrix of the data bits a pattern of bits to be deleted or repeated to provide the desired data rate, decoding an address of each bit in said pattern in a manner inverse to the interleaving process to produce a respective address of the bit in the matrix of interleaved data bits, and deleting or repeating the respective bit in the interleaved data bits in dependence upon the respective address. The address decoding is performed in the same manner as a coding of addresses for producing the interleaved data bits from the non-interleaving matrix of the data bits. The specification also discloses an advantageous interleaving process for channel interleaving in a 3rd generation CDMA wireless communications system, a shuffling method for a second stage of interleaving in such a system, and how the raft matching can be conveniently applied to turbo-coded data coded.

IPC Classes  ?

  • H03M 13/27 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes using interleaving techniques
  • H03M 13/29 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
  • H03M 13/00 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
  • H04L 1/22 - Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
  • H04L 12/20 - Arrangements for providing special services to substations for converting transmission speed from the inherent speed of a substation to the inherent speed of other substations

59.

RATE MATCHING AND CHANNEL INTERLEAVING FOR A COMMUNICATIONS SYSTEM

      
Document Number 02742096
Status In Force
Filing Date 1999-04-13
Open to Public Date 2000-10-13
Grant Date 2015-01-06
Owner ERICSSON AB (Sweden)
Inventor
  • Tong, Wen
  • Leretaille, Catherine
  • Gosne, Stephane

Abstract

A method of and apparatus for matching a rate of data bits, in a matrix of data bits interleaved by a predetermined interleaving process, to a desired rate by deletion of redundant data bits or repetition of data bits derived from the matrix, includes steps of determining in a non-interleaved matrix of the data bits a pattern of bits to be deleted or repeated to provide the desired data rate, decoding an address of each bit in said pattern in a manner inverse to the interleaving process to produce a respective address of the bit in the matrix of interleaved data bits, and deleting or repeating the respective bit in the interleaved data bits in dependence upon the respective address. The address decoding is performed in the same manner as a coding of addresses for producing the interleaved data bits from the non-interleaved matrix of the data bits. The specification also discloses an advantageous interleaving process for channel interleaving in a 3rd generation CDMA wireless communications system, a shuffling method for a second stage of interleaving in such a system, and how the rate matching can be conveniently applied to turbo-coded data coded.

IPC Classes  ?

  • H03M 13/27 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes using interleaving techniques
  • H03M 13/23 - Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using convolutional codes, e.g. unit memory codes
  • H03M 13/29 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes

60.

STRUCTURE WITH MAGNETIC PROPERTIES

      
Document Number 02322514
Status In Force
Filing Date 1999-12-23
Open to Public Date 2000-07-13
Grant Date 2009-08-18
Owner ERICSSON AB (Sweden)
Inventor
  • Holden, Anthony James
  • Robbins, David James
  • Stewart, William James
  • Wiltshire, Michael Charles Keogh
  • Pendry, John Brian

Abstract

A structure (2) which exhibits magnetic properties when it receives electromagnetic radiation (20) is formed from an array of capacitive elements (4) each of which is smaller, and preferably much smaller, than the wavelength of the radiation. Each capacitive element (4) has a low resistance conducting path associated with it and is such that a magnetic component of the received electromagnetic radiation (20) induces an electrical current to flow around said path and through the associated element. The creation of internal magnetic fields generated by the flow of the induced electrical current gives rise to the structure's magnetic properties.

IPC Classes  ?

  • H01Q 17/00 - Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
  • H01Q 15/00 - Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices

61.

OPTIMIZATION AND RECOVERY TECHNIQUES IN IMA NETWORKS

      
Document Number 02224756
Status In Force
Filing Date 1997-12-12
Open to Public Date 1999-06-12
Grant Date 2002-04-16
Owner ERICSSON AB (Sweden)
Inventor
  • Patriarche, Douglas H.
  • Rahman, Reshad
  • Vallee, Richard
  • White, Stuart C.

Abstract

In ATM networks, digital data in ATM cells are sent to a destination node over a connection made up of more than one transmission link in round robin fashion. This is called inverse multiplexing. Suitable transmission links are selected among a plurality of provisionable transmission links according to some selection criteria. According to some embodiments of the invention, the selection criteria are minimum delay and maximum bandwidth.

IPC Classes  ?

  • H04L 12/709 - Route fault prevention or recovery, e.g. rerouting, route redundancy, virtual router redundancy protocol [VRRP] or hot standby router protocol [HSRP] using path redundancy using M+N parallel active paths

62.

BRIDGE STABILIZATION

      
Document Number 02256488
Status In Force
Filing Date 1997-05-27
Open to Public Date 1997-12-04
Grant Date 2007-10-02
Owner ERICSSON AB (Sweden)
Inventor Corney, John Michael

Abstract

A bridge deck is supported by tensile supports and stabilized to reduce the overall aerodynamic lift on the deck by the addition of aerofoil stabilizers pivotally secured about respective axes generally longitudinal of the deck. The stabilizers are driven by a mechanism operable by angular movement between the deck and the tensile supports to articulate the stabilizers to a position which will generate a force in the presence of a cross wind, to reduce the overall aerodynamic lift on the deck.

IPC Classes  ?

  • E01D 11/00 - Suspension or cable-stayed bridges
  • E01D 11/02 - Suspension bridges
  • E01D 22/00 - Methods or apparatus for repairing or strengthening existing bridges

63.

METHOD AND APPARATUS FOR MANIPULATING AN ATM CELL

      
Document Number 02152714
Status In Force
Filing Date 1995-06-27
Open to Public Date 1996-08-01
Grant Date 2002-01-01
Owner ERICSSON AB (Sweden)
Inventor
  • Ganmukhi, Mahesh N.
  • Jordan, Brian L.

Abstract

The present invention pertains to an apparatus for manipulating ATM cells. The apparatus comprises a memory array in which an entire ATM cell can be read or written in one read or write cycle. The apparatus is also comprised of a mechanism for reading or writing the entire ATM cell from or into the memory array. The present invention pertains to a method for switching an ATM cell. The method comprises the steps of receiving the ATM cell at a first input port of a switch from the ATM network. Then there can be the step of storing the ATM cell in one clock cycle in a memory array of the switch. Next there is the step of reading the ATM cell in the memory array in one clock cycle. Next there is the step of transferring the ATM cell from the memory array to a first output port of the switch. Next there is the step of transmitting the ATM cell from the first output port to the ATM network. The present invention pertains to a switch for an ATM cell. The switch comprises I input ports which receive ATM cells from an ATM network, where I > 1 and is an integer. The switch is also comprised of a memory array connected to the I input ports for storing an ATM cell received by one of the I input ports in one clock cycle. The switch also comprises o output ports connected to the memory array, where O > 1 and is an integer. One of the O output ports transmit an ATM cell which is received from the memory array to the ATM network. Additionally, the switch comprises a controller connected to the memory array, I input ports and O output ports for controlling the storage of an ATM cell from one of the input ports into the memory array in one clock cycle. The switch can be used for normal switching operation, multicasting, demultiplexing or multiplexing.

IPC Classes  ?

  • H04L 12/56 - Packet switching systems
  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing

64.

METHOD AND APPARATUS FOR SWITCHING, MULTICASTING MULTIPLEXING AND DEMULTIPLEXING AN ATM CELL

      
Document Number 02152710
Status In Force
Filing Date 1995-06-27
Open to Public Date 1996-08-01
Grant Date 2001-07-24
Owner ERICSSON AB (Sweden)
Inventor
  • Ganmukhi, Mahesh N.
  • Jordan, Brian L.

Abstract

The present invention pertains to an apparatus for manipulating ATM cells. The apparatus comprises a memory array in which an entire ATM cell can be read or written in one read or write cycle. The apparatus is also comprised of a mechanism for reading or writing the entire ATM cell from or into the memory array. The present invention pertains to a method for switching an ATM cell. The method comprises the steps of receiving the ATM cell at a first input port of a switch from the ATM network. Then there can be the step of storing the ATM cell in one clock cycle in a memory array of the switch. Next there is the step of reading the ATM cell in the memory array in one clock cycle. Next there is the step of transferring the ATM cell from the memory array to a first output port of the switch. Next there is the step of transmitting the ATM cell from the first output port to the ATM network. The present invention pertains to a switch for an ATM cell. The switch comprises I input ports which receive ATM cells from an ATM network, where I > 1 and is an integer. The switch is also comprised of a memory array connected to the I input ports for storing an ATM cell received by one of the I input ports in one clock cycle. The switch also comprises O output ports connected to the memory array, where O > 1 and is an integer. One of the O output ports transmit an ATM cell which is received from the memory array to the ATM network. Additionally, the switch comprises a controller connected to the memory array, I input ports and O output ports for controlling the storage of an ATM cell from one of the input ports into the memory array in one clock cycle. The switch can be used for normal switching operation, multicasting, demultiplexing or multiplexing.

IPC Classes  ?

  • H04L 12/56 - Packet switching systems
  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing

65.

METHOD AND A SCHEDULER FOR CONTROLLING WHEN A SERVER PROVIDES SERVICE WITH RATE CONTROL TO AN ENTITY

      
Document Number 02150967
Status In Force
Filing Date 1995-06-05
Open to Public Date 1996-06-23
Grant Date 2001-04-03
Owner ERICSSON AB (Sweden)
Inventor Bennett, Jon C. R.

Abstract

The present invention pertains to a method for scheduling when a server provides service to entities. The method comprises the steps of identifying when a first entity requests service from the server. Next there is the step of providing service to an entity, such as a first entity or a second entity, as a function of virtual time. The present invention pertains to a scheduler for controlling when a server provides service to entities. The scheduler comprises a memory having times which are a function of when entities request service from the server. The scheduler is also comprised of a virtual clock that keeps track of time. The scheduler is also comprised of a controller which causes an entity to receive service from the server as a function of virtual time. The present invention pertains to a scheduler for scheduling when N entities each of which has a weight w, where N is an integer > 1 and w is a real number, are served by a server. The scheduler is comprised of a starting time memory having starting times s i when the N entities request service, where 1 ~ i ~ N and is an integer, and s i is the time at which the i'th entity may next get service from the server. The scheduler is also comprised of a finishing time memory having f i finishing times f i when the N entities should be serviced, where f i is the time by which the i'th entity should be serviced by the server. The scheduler is also comprised of a virtual clock that keeps track of time V k where k ~ 0 and is an integer and -50- V k=MAX((V k-1+P) + (1*X) + ((1/AW)*T), (s smin*Y) + ((f Fmin - S smin)*Z)) where(~P~+~T~+~X~)*(~Y~+~Z~)> 0 where S Smin is the earliest start time s i of when an entity requests service from the server; f Fmin is the earliest finish time of an entity waiting for service from the server; V k-1 is the virtual time when the server last served an entity; A W = sum over all entities currently asking for service of w i, where w i is the i'th entity's weight; and X, T, Y and Z are real numbers. If rate control is utilized, then Y=Z=0 and the last line of the equation is not applicable, or in other words, V k = V k-l +1.

IPC Classes  ?

  • G06F 9/46 - Multiprogramming arrangements
  • G06F 9/48 - Program initiating; Program switching, e.g. by interrupt
  • G06F 9/50 - Allocation of resources, e.g. of the central processing unit [CPU]
  • H04L 29/06 - Communication control; Communication processing characterised by a protocol

66.

METHOD AND A SCHEDULER FOR CONTROLLING WHEN A SERVER PROVIDES SERVICE TO AN ENTITY

      
Document Number 02150966
Status In Force
Filing Date 1995-06-05
Open to Public Date 1996-06-23
Grant Date 2002-05-21
Owner ERICSSON AB (Sweden)
Inventor Bennett, Jon C. R.

Abstract

A method for scheduling when a server provides service to entities. The method comprises the steps of identifying when a first entity requests service from the server. Next there is the step of providing service to an entity, such as a first entity or a second entity, as a function of when the entity requests service from the server. A scheduler is also described for controlling when a server provides service to entities. The scheduler comprises a memory having times which are a function of when entities request service from the server. The scheduler is also comprised of a virtual clock that keeps track of time as a function of when entities request service from the server. The scheduler is also comprised of a controller which causes an entity to receive service from the server as a function of when the entity requests service from the server.

IPC Classes  ?

  • G06F 9/46 - Multiprogramming arrangements
  • G06F 9/50 - Allocation of resources, e.g. of the central processing unit [CPU]
  • G06Q 10/00 - Administration; Management
  • H04L 29/06 - Communication control; Communication processing characterised by a protocol

67.

METHOD AND APPARATUS FOR MULTICAST OF ATM CELLS

      
Document Number 02151180
Status In Force
Filing Date 1995-06-07
Open to Public Date 1996-03-15
Grant Date 2003-11-04
Owner ERICSSON AB (Sweden)
Inventor
  • Brownhill, Robert
  • Bennett, Jon C. R.

Abstract

The present invention pertains to a method for multicasting ATM cells. The method comprises the steps of reading a first ATM cell to which a first cell read pointer is pointing. Then there is the step of transmitting the first ATM cell out a first port to a first address. Next there is the step of determining whether the first ATM cell is to be transmitted out the first port to a second address. Next there is the step of reading a cell pointer pointing to a second ATM cell if the transmission of the first ATM cell out the first port to addresses is completed. The present invention pertains to a multicast system for an ATM network. The multicast system is comprised of a first ATM cell pointer mechanism associated with a first port. The multicast system also comprises at least a second ATM cell pointer mechanism associated with a second port. The multicast system is also comprised of at least a first ATM cell. The first ATM cell pointer mechanism and the second ATM cell pointer mechanism points to the first ATM cell. There is a first node having a first address and a node address pointer. The first ATM cell pointer mechanism points to the first node. There is a second node having a second address. The node address pointer of the first node points to the second node. The first and second nodes form a linked list of addresses. The first ATM cell preferably has a cell pointer. The multicast system preferably includes a second ATM cell. The cell pointer of the first ATM cell points to the second ATM cell. The first ATM cell and second ATM cell forms a linked list of ATM cells. The multicast system can include a controller for controlling when a pointer is read and when an ATM cell is transmitted out a port and with which address. The controller is in communication with the nodes, cells and pointers. The multicast -36- system preferably also includes a write pointer pointing to a last ATM cell in the linked list of ATM cells.

IPC Classes  ?

  • H04L 12/56 - Packet switching systems
  • H04L 12/18 - Arrangements for providing special services to substations for broadcast or conference
  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing

68.

MULTICAST SHARED MEMORY

      
Document Number 02151181
Status In Force
Filing Date 1995-06-07
Open to Public Date 1996-03-15
Grant Date 2002-01-01
Owner ERICSSON AB (Sweden)
Inventor
  • Bennett, Jon C. R.
  • Brownhill, Robert

Abstract

A linked list for multicast in an ATM network. The linked list comprises a first cell. The linked list also comprises a plurality of read pointers. Each read pointer is associated with a port. Each read pointer points to the first cell. A multicast system for an ATM network. The system comprises a first port through which a cell passes. The system also comprises a first read pointer associated with the first port. The multicast system additionally comprises at least a second port through which the cell passes. There is at least a second read pointer associated with the second port. The multicast system is comprised of a cell to which each read pointer points. Furthermore, the multicast system is comprised of a controller for controlling when a read pointer reads a cell. The system preferably includes a plurality of cells. Each cell has a cell pointer pointing to a next cell. The plurality of cells forms a linked list. The controller points a read pointer to the next cell after the cell the read pointer was pointing to is read. A method for multicasting. The method comprises the steps of forming a first read pointer and at least a second read pointer. Each read pointer corresponds to a first port and a second port, respectively. Each read pointer points to a cell. Then there is the step of choosing a port. Next there is the step of locating the read pointer for the port. Then there is the step of reading the cell to which the read pointer is pointing. Preferably, the cell includes data and the cell includes a cell pointer pointing to a second cell, if there is a second cell. The first cell and at least the second cell forms a linked list.

IPC Classes  ?

  • H04L 12/56 - Packet switching systems
  • H04L 12/18 - Arrangements for providing special services to substations for broadcast or conference
  • H04Q 11/04 - Selecting arrangements for multiplex systems for time-division multiplexing