Reacquisition and handoff in a slotted mode communication...

Details Reacquisition and handoff in a slotted mode communication... Reacquisition and handoff in a slotted mode communication...

H - Electricity

04

Q

H04Q 7/38 (2006.01)

Patent

CA 2404580

In a remote unit (50) of a slotted mode wireless communication system, the handoff performance is improved. Search parameters for a preferred base station, and a desired number of neighboring base stations, are passed to a search engine during a preparation period (46) of an active state (42) of the remote unit prior to its assign slot. While in the preparation period (46), the search engine performs (70) searches and the controller evaluates the results. If one of the neighboring base stations' pilot signal is sufficiently stronger than the preferred base station (74) then a handoff is performed, assigning (76) the neighboring base station as the preferred base station. The handoff is completed before the remote unit enters its assigned slot (48).

Dans une unité (50) éloignée d'un système de communication sans fil à mode de créneaux temporels, les performances de transfert sont améliorées. Des paramètres de recherche d'une station de base préférée, ainsi qu'un nombre voulu de stations de base voisines sont communiqués à un moteur de recherche pendant une période de préparation (46) d'état actif (42) de l'unité éloignée, avant le créneau temporel affecté à celle-ci. Pendant la période de préparation (46), le moteur de recherche effectue (70) des recherches et un organe de commande évalue les résultats. Si le signal pilote de l'une des stations de base voisines est suffisamment plus puissant que celui de la station de base (74) préférée, un transfert est mis en oeuvre qui affecte (76) la station de base voisine comme station de base préférée. Le transfert est achevé avant que l'unité éloignée n'entre dans le créneau temporel (48) qui lui a été affecté.

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