Apparatus and method for retransmitting data according to...

H - Electricity – 04 – L

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H04L 1/16 (2006.01) H04W 80/00 (2009.01) H04L 1/18 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2381073

There are provided an apparatus and method for retransmitting data according to a radio link protocol in a mobile communication system. In the method of requesting frame retransmission, a receiver stores the sequence numbers of a plurality of RLP (Radio Link Protocol) frames that are not received from a transmitter and transmits a retransmission request frame including fields that indicate the sequence numbers. Then, the transmitter sequentially transmits the requested RLP frames in the order of the sequence numbers to the receiver. The receiver compares the stored sequence numbers with the sequence numbers of received RLP frames and if it receiver fails to receive one of the requested RLP frames, the receiver requests retransmission of the lost RLP frame upon receipt of an RLP frame of a higher sequence number than the sequence number of the lost RLP frame.

L'invention concerne un appareil et un procédé de retransmission de données, conformément à un protocole de liaison radio (RLP), dans un système de communication mobile. Selon ce procédé de retransmission de la trame, un récepteur stocke des numéros d'ordre de plusieurs cadres de protocoles de liaison radio (RLP) qui ne sont pas reçus d'un émetteur et transmet une trame de demande de retransmission, comprenant des champs qui indiquent des numéros d'ordre. Ensuite, l'émetteur émet les trames RLP requises par séquences, dans l'ordre des numéros d'ordre au récepteur. Le récepteur compare les numéros d'ordre stockés avec les numéros d'ordre des trames RLP reçus et si le récepteur ne parvient pas à recevoir une des trames RLP requis, le récepteur demande la retransmission de la trame RLP perdue sur réception d'une trame RLP d'un numéro d'ordre supérieur au numéro d'ordre de la trame RLP perdue.

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