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Distributed media access control method based on analog network coding

A medium access control and analog network coding technology, applied in the field of medium access control for analog network coding, can solve the problems of reduced system performance, high complexity, no consideration of no bidirectional data, etc. Impact, achieve low-cost effects

Active Publication Date: 2015-02-25
SHANGHAI JIAO TONG UNIV
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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

Method used

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  • Distributed media access control method based on analog network coding
  • Distributed media access control method based on analog network coding
  • Distributed media access control method based on analog network coding

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] Such as Figure 2 to Figure 6 As shown, the present invention designs five control frames: RTS, CTS, RTC (Request to Cooperate), ATC (Answer to Cooperate) and COF (Channel Occupation Frame).

[0045] Such as figure 2 As shown, the RTS frame is sent by the originating node A to the rebroadcasting node B, for initiating a request for establishment of cooperation. In the RTS frame, the CA field contains the address of the coordinating node C. The frame structure of the COF frame is the same as that of the RTS frame, and is broadcast by the initial node A to other nodes in the network.

[0046] Such as image 3 As shown, the RTC frame is sent by the rebroadcasting node B to the coordinating node C for rebroadcasting the cooperation establishment request of the initial node. In the RTC frame, the IA field contains the address of the initial node A, and the FA f...

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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...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/00H04L29/06
CPCH04L1/0076H04L1/1607
Inventor 王旭东毛文广
Owner SHANGHAI JIAO TONG UNIV
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