Distributed media access control method based on analog network coding

Abstract

The invention discloses a distributed media access control method based on analog network coding. The method includes the following steps that (1) a rebroadcasting node sends RTC control frames to a cooperation node after receiving RTS control frames sent by an initial node; (2) after receiving the RTC control frames, the cooperation node sends ATC control frames to a forwarding node if data need to be sent to the initial node; (3) when receiving the ATC control frames before waiting time is up, the rebroadcasting node sends CTS control frames; (4) after the initial node and the cooperation node receive the CTS control frames, a cooperative group is established successfully, and data sending can be started; (5) after data transmission is finished, the initial node and the cooperation node send ACK signals for confirmation in an analog network coding mode. According to the distributed media access control method based on analog network coding, dynamic establishment of the cooperative group in a wireless network is achieved through control frame exchanging, and complex parameter obtaining in traditional scheduling algorithms is avoided.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a medium access control method for analog network coding in a wireless network. Background technique [0002] Analog network coding can greatly improve the spectrum efficiency of wireless communication. In practical multi-hop wireless networks, a corresponding medium access control method is needed to coordinate the transmission between nodes. Existing media access control methods suffer from the following limitations: [0003] (1) In wireless networks with complex topological structures such as mesh networks and ad hoc networks, the complexity of establishing cooperative groups through scheduling algorithms in existing methods is too high. A feasible alternative is to use dynamic random distribution way to create collaborative groups. [0004] (2) Existing methods do not consider the situation when there is no bidirectional data between cooperative groups. In fact, this...

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Problems solved by technology

[0003] (1) In wireless networks with complex topological structures such as mesh networks and ad hoc networks, the complexity of establishing cooperative groups through scheduling algorithms in existing methods is too high. A feasible alternative is to use dynamic random distribution collaborative approach

[0004] (2) Existing methods do not consider the situation when there is no two-way data between cooperative groups

In fact, this situation is very common and can greatly reduce system performance

[0005] (3) Existing methods do not consider the degradation of system performance caused by the hidden terminal problem

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