Device and method for performing handoff in mobile...

H - Electricity – 04 – Q

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Details

H04Q 7/38 (2006.01) H04Q 7/22 (2006.01) H04Q 7/24 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2312823

A mobile communication system transmitting data in frame unit includes a base station apparatus and a terminal apparatus. The transmitter comprises a controller having consecutive first and second frames each divided into a first interval and a second interval following the first interval. In a handoff mode, the controller transmits respective frame data in the first interval of the first frame and the second interval of the second frame and stops transmission of the data in the second interval of the first frame and the first interval of the second frame. Further, the terminal apparatus comprises a receiver for processing received data, a handoff determiner for determining a handoff target base station by analyzing a strength of the received signal, and a controller applying to the receiver a signal transmitted from a present base station in the first interval of the first frame and the second interval of the second frame and applying to the handoff determiner signals transmitted from other base stations in the second interval of the first frame and the first interval of the second frame.

L'invention concerne un système de communication mobile transmettant des données en unité de trame, qui comprend une station de base et une station terminale. L'émetteur comporte un organe de commande présentant des première et seconde trames divisées chacune en un premier intervalle et en un second intervalle qui suit le premier intervalle. En mode de transfert, l'organe de commande transmet les données de trame respectives dans le premier intervalle de la première trame et le second intervalle de la seconde trame, et il interrompt la transmission des données dans le second intervalle de la première trame et dans le premier intervalle de la seconde trame. Par ailleurs, la station terminale comporte un récepteur qui traite les données reçues, une unité d'évaluation de transfert qui évalue une station de base cible de transfert en analysant une valeur de force du signal reçu, et une unité de commande qui applique au récepteur un signal transmis depuis la station de base choisie, dans le premier intervalle de la première trame et dans le second intervalle de la seconde trame, et qui applique en outre à l'unité d'évaluation de transfert les signaux émanant d'autres stations de base, dans le second intervalle de la première trame et dans le premier intervalle de la seconde trame.

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