Method and apparatus for performing idle mode reacquisition...

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/38 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2415381

Techniques to efficiently process paging channels in an asynchronous wireless communication system (100). In one aspect, if the base stations (104a, b, c) are not synchronized with each other and a remote terminal's (106) designated page time is different from base station to base station, the remote terminal (106) can wake up based on the earliest base station in a reacquisition search list (712) that includes candidate base stations to which the remote terminal may be handed off. In another aspect, the criteria to select base stations for evaluation as reacquisition targets may be based on the received power (512) of the base stations as well as their timing (514), both of which may be made relative to that of a preferred base station. In yet another aspect, the remote terminal may wake up multiple times in a particular paging cycle (i.e., a frame cycle or a DRX cycle) if there are one or more candidates base station to which the remote terminal may be handed off.

Cette invention concerne des techniques permettant de traiter efficacement des canaux de recherche dans un système de communication sans fil asynchrone (100). Selon un aspect de l'invention, si les stations de base (104a, b, c) ne sont pas synchronisées entre elles et si le temps de recherche spécifié d'un terminal éloigné (106) varie d'une station de base à une autre, ledit terminal (106) peut s'activer par rapport à la station de base figurant dans une liste de recherche de réacquisition (712) qui comprend des stations de base candidates sur lesquelles ledit terminal éloigné peut être transféré. Selon un autre aspect de l'invention, les critères de sélection de stations de base en tant qu'éventuelles cibles de réacquisition peuvent être fondés sur la puissance (512) reçue de stations de base ainsi que sur leur synchronisation (514), qui peuvent l'une et l'autre rapportées à une station de base préférée. Selon un autre aspect de l'invention encore, le terminal éloigné peut s'activer de multiples fois au cours d'un cycle de recherche donné (c'est-à-dire un cycle de trame ou un cycle à mode de réception discontinu/DRX) s'il existe un ou plusieurs stations de base candidates sur laquelle il peut être transféré.

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