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Transmission strategy method based on Nash equilibrium in cooperative communication

A Nash equilibrium, transmission strategy technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve the problems of ignoring, ignoring cooperative competition, and suboptimal transmission strategy

Inactive Publication Date: 2014-11-26
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

There are two adverse effects of ignoring cooperative competition: (1) The actual network performance is difficult to meet expectations
Existing research ignores cooperation and competition, and simply believes that as long as the data packet transmission rate is increased, better network throughput can be obtained, but in fact, cooperation and competition may make the improvement of network throughput not obvious or even reduced
(2) The transmission strategy adopted is not optimal
Existing research only considers whether the service flow needs to cooperate and whether the relay node is suitable, but ignores the impact of the additional competition caused by the transmission strategy of other service flows on itself

Method used

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  • Transmission strategy method based on Nash equilibrium in cooperative communication
  • Transmission strategy method based on Nash equilibrium in cooperative communication
  • Transmission strategy method based on Nash equilibrium in cooperative communication

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Embodiment Construction

[0016] The implementation of the present invention will be specifically described below in conjunction with the accompanying drawings and specific examples.

[0017] Suppose there are N service flows in the wireless network (f 1 , f 2 ,..., f N ) and N-1 idle nodes that can act as relays (r 1 ,r 2 ,...,r N-1 ), the probabilities of N service flows having data packet transmission are (a 1 ,a 2 ,...,a N ),Such as figure 1 shown. f i not in f j (i≠j,i∈[1,N],j∈[1,N]) within the transmission range, but in the adjacent relay node r k (i-k=0 or 1, k∈[1, N-1]) within the transmission range. Define direct communication, f i The direct transfer rate from sender to receiver is in collaborative communication i The cooperative transfer rate from sender to receiver is When the service flow requires cooperative communication and there are multiple idle nodes within the transmission range, the service flow selects one of the nodes as a relay node with equal probability.

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Abstract

The invention provides a transmission strategy method based on Nash equilibrium in cooperative communication. According to existing research, only a favorable factor (increase of the transmission rate) brought by a relay node is considered, an adverse affect (cooperation competition) possibly brought by introduction of the relay node is ignored, and therefore the performance of a wireless network is not effectively improved. According to the method, the favorable factor and the adverse affect of the selected relay node are comprehensively considered, a non-cooperative game theory is used, effects on service flows adopting different transmission strategies are considered, the service flows select the transmission strategies more flexibly and effectively, benefits of the service flows are guaranteed, meanwhile the system performance is maximized, the throughput capacity of a system is effectively improved, and the problem that the system performance declines due to blind cooperation is solved.

Description

technical field [0001] The invention relates to the technical field of cooperative communication, in particular to a transmission strategy method based on Nash equilibrium non-cooperative game in cooperative communication. Background technique [0002] In a wireless network, due to the existence of path loss and potential interference, various performance indicators in the communication process will be significantly reduced, and sometimes even the network performance will deteriorate sharply. A large number of studies have shown that multiple-input-multiple-output (MIMO, multiple-input-multiple-output) technology can double the capacity and spectrum utilization of wireless channels, thus becoming a hot technology. However, since it needs to be equipped with multiple antennas at the same time, it makes it difficult for the MIMO technology to be applied to small devices such as mobile terminals. In this context, a new technology—cooperative communication (CC, cooperative comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/08
Inventor 曹傧孙曦李云刘期烈陈权
Owner CHONGQING UNIV OF POSTS & TELECOMM
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