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Résultats pour
brevets
1.
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ROAMING WIRELESS CLIENT COMMUNICATION
Numéro de document |
02511637 |
Statut |
Délivré - en vigueur |
Date de dépôt |
2005-07-06 |
Date de disponibilité au public |
2006-01-26 |
Date d'octroi |
2012-03-13 |
Propriétaire |
- AVAYA COMMUNICATION ISRAEL LTD. (Israël)
- MOTOROLA INC. (USA)
- PROXIM INC. (USA)
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Inventeur(s) |
- Sadot, Emek
- Chinitz, Leigh Michael
- Wilson, Timothy
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Abrégé
A method of reducing tunneling in a wireless packet network. The method includes defining a home access point for a client station, determining that the client station is being serviced by an access point different from the home access point, deciding if the client station should change its home access point to the access point from which the client station receives service and initiating a change of the home access point of the client station, if so decided.
Classes IPC ?
- H04W 8/26 - Adressage ou numérotation de réseau pour support de mobilité
- H04W 8/02 - Traitement de données de mobilité, p.ex. enregistrement d'informations dans un registre de localisation nominal [HLR Home Location Register] ou de visiteurs [VLR Visitor Location Register]; Transfert de données de mobilité, p.ex. entre HLR, VLR ou réseaux externes
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2.
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MIXER FOR USE IN A MICROWAVE SYSTEM
Numéro de document |
01203578 |
Statut |
Délivré - en vigueur |
Date de dépôt |
1983-05-20 |
Date d'octroi |
1986-04-22 |
Propriétaire |
MOTOROLA, INC. (USA)
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Inventeur(s) |
Roberts, Clayton R.
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Abrégé
A MIXER FOR USE IN A MICROWAVE SYSTEM ABSTRACT OF THE DISCLOSURE The present invention relates to a mixer for use at high microwave frequencies (typically 21.8 x 23.2 GHz) in a low cost communication application. The invention utilizes low cost microwave components, including a low cost compartmented waveguide, shared by the signal and local oscillator and extensive microstrip circuitry. The provision of a pair of novel 1/4 wave impedance provides efficient antenna and local oscillator input filtering, and efficient coupling from the waveguide sections to the microstrip circuitry. The mixer oper- ation is carried out in the microstrip circuitry, which contains a hybrid coupler, a balanced diode detector, and the required mixer output filter. The arrangement is of low cost, and provides a low noise figure (7 db including the preamplifier), a good band selectivity (15 db return loss over the communications band), and low local oscillator radiation.
Classes IPC ?
- H04B 1/26 - Circuits pour récepteurs superhétérodynes
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