A Multi-relay Cooperative Wireless Media Access Method Converging Network Coding

Abstract

The invention discloses a medium access method for managing multiple relays in a wireless cooperative network: two terminal nodes respectively send data packets to each other, and adjacent candidate nodes monitor and cache the sent data packets, and when the node receiving the data packets Due to receiving errors or failures, the adjacent candidate nodes are requested to cooperate to complete the communication and send RRF frames to request. If the receiving node also has a data packet to send, it is sent together with the RRF frame. Finally, the relay node adopts different backoff values ​​to compete for the channel according to the number of data packets it monitors, and the node whose priority backoff value reaches zero becomes the relay node, and sends RSF frames to complete cooperative transmission. At the same time, network coding can encode and transmit multiple data packets together, effectively increasing the collaboration gain and network throughput. The relay node completes multi-relay cooperative two-way communication through the fusion of network coding, further improving network performance.

Description

Technical field [0001] The present invention belongs to the field of wireless communication technology, and more specifically, relates to a multi-relay wireless cooperative media access method integrating network coding. Background technique [0002] The research of cooperative communication technology originated from the research work on the characteristics of information theory in the relay channel in the 1970s. Through the participation of the nodes near the terminal in the network to communicate, it can greatly improve the network performance, save node energy, and improve resource utilization. Has been or is being applied and researched in wireless metropolitan area networks, cellular mobile communication networks, wireless local area networks, and wireless sensor networks. Medium Access Control (MAC) is an important part of the communication network, and its performance directly affects the overall performance of the wireless communication network and the efficiency of chan...

AI Technical Summary

Problems solved by technology

In addition, there is another method that uses the method of simultaneous transmission of multiple relay nodes, combined with distributed space-time coding, by selecting a transmission mode, which can improve network transmission stability, data transmission rate and network performance, but the complexity is relatively large

The above five documents all use their own strategies to select relay nodes to complete cooperative transmission, or use more complex coding systems to improve network performance, but there are still various drawbacks

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