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Relay node selection method with guaranteed global bit error rate performance in cooperative communication

A relay node and cooperative communication technology, applied in wireless communication, access restrictions, electrical components, etc., to achieve the effect of ensuring accuracy

Active Publication Date: 2019-04-26
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above two schemes are relative to the improvement of information transmission reliability, and the consideration of influencing factors is one-sided. Therefore, there are certain limitations to the improvement of information transmission bit error rate performance

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  • Relay node selection method with guaranteed global bit error rate performance in cooperative communication
  • Relay node selection method with guaranteed global bit error rate performance in cooperative communication
  • Relay node selection method with guaranteed global bit error rate performance in cooperative communication

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Embodiment Construction

[0029] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] The relay node selection method that can guarantee the global bit error rate performance in cooperative communication in this embodiment is used to select a relay node for each transmission pair in the single-source, multi-purpose, and multi-relay wireless communication process. Single-source multi-purpose multi-relay wireless communication system model, such as figure 1 As shown, a source node S sends information, and multiple destination nodes D receive information. There is a direct link between the source node and each destination node. For the sake of clarity in the figure, figure 1 The through link is not shown in the figure. The ultimate goal of this embodiment is to select an optimal relay node from the candidate relay set for each destination node D or each information transmission pair to participate in cooperative transmi...

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Abstract

The invention relates to a relay node selection method capable of ensuring the global bit error rate performance in cooperative communication, and belongs to the field of reliable transmission of wireless communication. The relay node selection method comprises the steps that a channel coefficient matrix A of a direct link corresponding to each transmission pair, a channel coefficient matrix B between a source node and a candidate relay node, and a channel coefficient matrix C from the candidate relay node and a destination node are randomly generated; sequential sorting is performed on the transmission pairs according to a sequence of the direct link channel quality from low to high; a currently optimal relay node is selected for the m information transmission pairs one by one according to sequential sorting of the information transmission pairs on the basis of the size relationship between the number n of the candidate relay nodes and a threshold delta of the candidate relay nodes; and each transmission pair carries out information transmission by using the optimal relay node thereof. The channel quality of two channels corresponding to each candidate relay node is comprehensively considered in the process of relay node selection, the information transmission reliability of the whole network is measured at the same time, so that the global reliability and the global bit error rate performance of information transmission are ensured at the same time.

Description

technical field [0001] The invention belongs to the field of reliable transmission of wireless communication, and in particular relates to a relay node selection method which can guarantee the performance of global bit error rate in cooperative communication. Background technique [0002] In wireless communication technology, the wireless channel has fading characteristics, so that the destination node cannot receive the information sent by the source node with zero bit error rate, which limits the communication quality of the wireless channel. According to the uncorrelated characteristics of independent samples of the same signal in the wireless propagation environment, the existing diversity technology can compensate the fading channel loss, and then use a certain signal combination technology to improve the received signal, so as to resist the adverse effects caused by fading. Multiple Input Multiple Output antenna technology (Multiple Input Multiple Output, MIMO) just us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/12H04W40/22H04W48/20
CPCH04W40/12H04W40/22H04W48/20
Inventor 赵玉丽郭丽朱志良于海张伟殷洪建高祥李姗姗
Owner NORTHEASTERN UNIV LIAONING
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