An automatic retransfer request method, system and relay station in relay network

Abstract

An embodiment of the invention discloses an automatic retransmission requesting method in a relay network. The method comprises the following procedures: storing the data and transmitting the data to the receiving end when a relay station RS confirms that the data from the transmitting side is correctly received; returning an affirmative response of the corresponding data to the transmitting side by the RS when the RS confirms that the data corresponding to the response information is correctly received by the receiving end according to the response information from the receiving end; and retransmitting the corresponding data when the RS confirms that the data stored by itself is not correctly received by the receiving end according to the response information. The embodiment of the invention simultaneously discloses an automatic retransmission requesting system and a relay station in the relay network. The method, system and relay station provided by the embodiment of the invention can avoid the problems of larger time delay of the data transmission in the first RS processing mechanism of the prior art and more RS caching resource engaging in the second RS processing mechanism of the prior art.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to an automatic retransmission request technology in a relay network. Background technique [0002] In the relay network, the automatic repeat request process between the receiving end and the sending end is realized through the relay station (RS), and the automatic repeat request processing process between the sending end and the receiving end is based on the existing standard automatic repeat request (ARQ) protocol specification. I won’t go into details here. A processing mechanism of RS is: [0003] After the RS receives the media access control protocol data unit (MPDU, MAC PDU) from the sender, it forwards the MPDU to the receiver; when the RS receives the ARQ feedback payload returned by the receiver, it forwards the ARQ feedback payload to the sender; When the RS receives the ARQ discard message / ARQ reset message sent by the sending end, it forwards it to the receiving en...

AI Technical Summary

Problems solved by technology

However, the speed at which the RS receives the positive response information from the receiving end to the data is relatively small, so the sliding speed of the sending window is also relatively small. At this time, the RS will store more data because it cannot forward the received data to the receiving end in time. , thus occupying more cache resources of RS

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