Medium access control (MAC) method and device of multirate cooperation

Abstract

The invention provides a medium access control (MAC) method and device of multirate cooperation. The method is characterized by comprising the following steps: sending data packets to a receiving node and more than one intermediate nodes by a sending node, and judging whether the receiving node receives the data packets successfully; if the receiving node receives the data packets successfully, stopping processes, otherwise setting existing competition rate by the receiving node; judging whether each intermediate node meets preset conditions; if each intermediate node meets the preset conditions, competitively sending ready help (RH) packets to the receiving node so as to determine cooperative nodes; and judging whether the cooperative nodes are determined successfully by the receiving node, if the cooperative nodes are determined successfully, sending the data packets to the receiving node by the cooperative nodes, otherwise returning to the step of setting the existing competition rate by the receiving node. By using the MAC method and device, the effectiveness of data transmission can be ensured, and the transmission time delay can be shortened.

Description

Technical field [0001] The present invention relates to wireless communication technology, in particular to a method and device for multi-rate cooperative media access control (Medium Access Control, MAC for short). Background technique [0002] The MAC method is used for multiple nodes or users to quickly, efficiently, fairly, and reliably share channel resources, and therefore has an important impact on performance indicators such as network throughput and delay. In wireless communication, in order to reduce the adverse effects of multipath fading, diversity transmission is adopted. The sending node transmits multiple copies of the same signal through channels independent of each other in fading, and the receiving node combines the signals of each channel to ensure reliable communication. In the above-mentioned diversity transmission, it is necessary to adopt a cooperative MAC method to control the user sharing channel, select a cooperative node from the intermediate nodes betw...

AI Technical Summary

Problems solved by technology

Although this method effectively guarantees the validity of the data packet received by the receiving node, since all intermediate nodes that meet the conditions participate in the cooperation until the receiving node sends an acknowledgment (ACK) packet, it is different from the cooperative MAC method initiated by the sending node and the Compared with the cooperative MAC method initiated by the cooperative node, it will occupy more channel resources and generate greater transmission delay

[0007] In short, the existing cooperative MAC method cannot guarantee the validity of data transmission and reduce the delay of data transmission.

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