Apparatus and method for retransmitting request in wireless...

H - Electricity – 04 – L

Patent

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H04L 1/16 (2006.01)

Patent

CA 2678667

Data retransmission apparatus and method in a wireless relay communication system are provided. It is checked whether an Acknowledgement (ACK) message or a Negative ACK (NACK) message for data is received from a Relay Station (RS), which receives the data from a Mobile Station (MS). Scheduling information for transmitting the data is transmitted to the RS, when the ACK message is received from the RS. Errors are checked for in of the data, when the data is received from the RS. The RS is requested to retransmit the data, when the data has an error. Accordingly, since the RS retransmits only the error-free data to the BS, the BS can enhance the data reliability.

L'invention concerne un procédé et un appareil de retransmission de données dans un système de communication à relais sans fil. On vérifie si un message d'accusé de réception (ACK) ou un message d'accusé de réception négatif (NACK) de données est reçu d'une station de relais (RS), qui reçoit les données d'une station mobile (MS). Des informations de programmation dans le temps destinées à transmettre les données sont transmises au RS, lorsque le message ACK est reçu de la RS. Des erreurs de données sont vérifiées lorsque les données sont reçues du RS. Il est demandé au RS de retransmettre les données lorsque ces données présentent une erreur. Par conséquent, dans la mesure où le RS ne retransmet que les données sans erreur à la BS, la BS peut améliorer la fiabilité des données.

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