Power control for point-to-multipoint services provided in...

H - Electricity – 04 – W

Patent

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H04W 52/00 (2009.01) H04W 4/06 (2009.01) H04L 12/18 (2006.01)

Patent

CA 2442503

To enable point-to-multipoint communication services in an existing cellular communication system infrastructure, each member subscriber station (102), i.e., a subscriber station participating in such a service, is receiving a forward link shared channel (106), and in certain embodiments additionally a forward link dedicated channel. Because transmission on the forward link channels from neighboring sectors presents interference to the transmission from the sector serving the subscriber station, it is desirable to control the forward link channel transmission power to the minimum acceptable power. Additionally, a transmission from each member subscriber station on a reverse link channel (108) presents interference to other subscriber stations. Therefore, it is desirable to control the reverse link channel transmission to the minimum signal level. Consequently, a method and apparatus for a power control that enables point-to-multipoint services in an existing infrastructure of a wireless cellular telephone system is disclosed.

Afin de faciliter des services de communication point à multipoint dans un système de communication cellulaire existant, chaque poste d'abonné, c'est-à-dire un poste d'abonné utilisant un tel service, reçoit un canal partagé de liaison aval, et, dans certains modes de réalisation, un autre canal réservé de liaison aval. Etant donné que la transmission sur les canaux de liaison aval venant des secteurs voisins crée des interférence avec la transmission venant du secteur qui dessert le poste d'abonné, il est préférable de régler la puissance de transmission du canal de liaison aval au niveau de puissance minimum acceptable. De plus, une transmission venant de chaque poste d'abonné sur un canal de liaison de retour crée des interférences avec les autres postes d'abonné. Par conséquent, il est préférable de régler la transmission de canal de liaison de retour à un niveau de signal minimum. C'est pourquoi l'invention porte sur un procédé et un appareil de contrôle de puissance qui facilite des services point à multipoint dans une infrastructure existante d'un système de téléphones cellulaires sans fils.

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