Apparatus and method for negotiating frame offset between...

H - Electricity – 04 – B

Patent

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H04B 7/26 (2006.01)

Patent

CA 2679706

Provided are an apparatus and method for negotiating a frame offset between a Base Station (BS) and a Relay Station (RS) in a wireless communication system using a multi-hop relay scheme. A communication method of a superordinate station includes, upon detecting an initial access of an relay station, determining an offset value between a frame number used in the superordinate station and a frame number to be used in the relay station; generating a message including RS frame offset information corresponding to the offset value; and transmitting the generated message to the relay station. Accordingly, since the base station and the relay station share the frame offset, the base station can transmit a specific broadcast message in advance to the relay station by considering the frame offset, and the relay station can transmit data, which has to be transmitted in synchronization with the base station at the same time point or at the same frame number, to a Mobile Station (MS) at an exact time point.

L'invention concerne un appareil et un procédé pour négocier un décalage de trame entre une station de base (BS) et une station relais (RS) dans un système de communications sans fil au moyen d'un mécanisme de relais multisaut. Un procédé de communication de station surordonnée consiste : à déterminer, lors de la détection d'un accès initial d'une station relais, une valeur de décalage de trame entre un nombre de trames utilisées dans la station surordonnée et un nombre de trames à utiliser dans la station relais; à générer un message comprenant des informations de décalage de trame RS correspondant à la valeur de décalage; et à transmettre le message généré à la station relais. En conséquence, du fait que la station de base et la station relais partagent le même décalage de trame, ladite station de base peut transmettre un message de diffusion spécifique à l'avance à la station relais par prise en compte du décalage de trame, et la station relais peut transmettre des données, qui doivent être transmises en synchronisation avec la station de base au même point temporel ou avec le même nombre de trames à une station mobile (MS) à un point temporel exact.

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