A network protocol for wireless broadband-isdn using atm

H - Electricity – 04 – B

Patent

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Details

H04B 7/212 (2006.01) H04L 1/00 (2006.01) H04L 12/56 (2006.01) H04L 29/06 (2006.01) H04Q 7/20 (2006.01) H04Q 11/04 (2006.01) H04Q 7/24 (2006.01) H04Q 7/30 (2006.01)

Patent

CA 2244925

A network protocol for wireless point (ACCESS NODE END) to multipoint (SUBSCRIBER END) networks where the users (SUBSCRIBER END) are stationary which utilize time-division multiplexing in downstream direction (DOWNSTREAM RF) from base station (ACCESS NODE END) to the user (SUBSCRIBER END), and time- division multiple access in the upstream direction (UPSTREAM RF) from the user (SUBSCRIBER END) to the base station (ACCESS NODE END), where medium access control actively assigns time slots in the upstream direction (UPSTREAM RF) to accommodate varying demands for bandwidth by multiple users, where upstream frame timing is synchronized to downstream frame timing, where time slots carrying individual ATM cells, and upstream time slot synchronization is maintained to within + 2 modulation symbols.

La présente invention concerne un protocole de réseau pour réseaux radio point (EXTREMITE NOEUD D'ACCES) à multipoint (EXTREMITE D'ABONNE) où les utilisateurs (EXTREMITE D'ABONNE) sont fixes quand ils utilisent le multiplexage à répartition temporelle dans le sens descendant (HF DESCENDANTE) allant de la station de base (EXTREMITE NOEUD D'ACCES) à l'utilisateur (EXTREMITE UTILISATEUR) et l'accès multiple par répartition dans le temps dans le sens montant (HF MONTANTE) allant de l'utilisateur (EXTREMITE UTILISATEUR) à la station de base (EXTREMITE NOEUD D'ACCES), où la commande d'accès au support attribue de manière active des tranches de temps dans le sens montant (HF MONTANTE) afin de faire face à des demandes variables de largeur de bande par des utilisateurs multiples, où le rythme de trame montante est synchronisé avec le rythme de trame descendante, où les tranches de temps portent des cellules ATM individuelles et la synchronisation des tranches de temps montantes est maintenue à l'intérieur de + 2 symboles de modulation.

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