A selection method of multi-antenna relay nodes in a cooperation communication system

A relay node and cooperative communication technology, applied in diversity/multi-antenna systems, wireless communication, space transmit diversity, etc., can solve the problems of not considering the principle of resource utilization fairness and antenna selection, etc., and achieve simple and practical algorithms, The effect of reducing bit error rate and taking into account fairness

Inactive Publication Date: 2014-10-22
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

OMRS and ABRS are mainly based on the consideration of signal-to-noise ratio factors, and provide some feasible solutions for the multi-antenna relay node selection problem in the cooperative communication system, but the antenna selection is not considered in the process of multi-antenna relay selection, and there is no Consider the principle of fairness in resource utilization, and antenna selection and fair resource utilization are important means for the system to optimize resource utilization. It is very important for the cooperative communication system to save resources and obtain good user experience satisfaction, and it has a role that cannot be ignored

Method used

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  • A selection method of multi-antenna relay nodes in a cooperation communication system
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  • A selection method of multi-antenna relay nodes in a cooperation communication system

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Experimental program
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Effect test

Embodiment 1

[0050] Setting parameters: system bandwidth B=5×10 6 Hz, the number of antennas of the relay base station n i =2, need to select 4 relay nodes. Among the 11 relay nodes detected by the destination node (i.e., m=11), there are 5 relay base stations. For the convenience of distinction, these 5 relay base stations are respectively named as relay base station 1, relay base station 2, and relay base station. Base station 3 , relay base station 4 , and relay base station 5 .

[0051] (1) The measured data rate of the first relay channel of relay base station 1 is V=7.3×10 6 b / s, the signal-to-noise ratio of the received signal of the first antenna of relay base station 1 The signal-to-noise ratio of the signal received by the destination node from the first antenna of relay base station 1 SNR of the first relay channel of relay base station 1 So the channel capacity of the first relay channel of relay base station 1 channel load SNR normalization function Channel load ...

Embodiment 2

[0127] Setting parameters: system bandwidth B=5×10 6 Hz, 6 relay nodes need to be selected. There is no relay base station among the 9 relay nodes detected by the destination node, that is, all of them are relay mobile user equipments. In order to facilitate the distinction, these 9 relay mobile user equipments are respectively named as relay mobile user Relay Mobile User Equipment 2, Relay Mobile User Equipment 3, Relay Mobile User Equipment 4, Relay Mobile User Equipment 5, Relay Mobile User Equipment 6, Relay Mobile User Equipment 7, Relay Mobile User Equipment 8, Relay Mobile User Equipment mobile user equipment9.

[0128] (1) Measure the data rate V=8.6×10 of the relay channel of the relay mobile user equipment 1 6 b / s, gamma 11 = 150, gamma 21 = 25, gamma 1 = 25, C 1 ≈11.751×10 6 b / s, η 1 ≈0.732, A(γ 1 )≈0.975, D(η 1 )≈0.523.

[0129] For relay mobile user equipment 1, there are:

[0130] U1=min(A(γ 1 ), 1-D(η 1 ))≈0.477;

[0131] U2=min(A(γ 1 ), D(η 1 )...

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Abstract

The invention discloses a selection method of multi-antenna relay nodes in a cooperation communication system. The selection method comprises the following steps: establishing an SNR (signal to noise ratio) normalization function and a channel load normalization function; mapping the SNR and the channel load of a signal to the SNR normalization function and the channel load normalization function respectively; and determining the relay selection algorithm according to the SNR normalization function and the channel load normalization function. According to the selection method, in the process of selecting the relay nodes, not only the factor of the SNR of a link is taken into consideration, but also the problem of equal utilization of relay resources is given consideration; and meanwhile, for a fixed multi-antenna relay base station, antenna selection and the relay selection of the relay base station are effectively combined. The selection method helps to reduce the error rate of the cooperation communication system, and meanwhile, the fairness of the utilization of the relay resources is taken into consideration; the algorithm is simple and practical; the performance is excellent; and the algorithm has realistic meaning for the application and operation of the cooperation communication system.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method for selecting a multi-antenna relay node in a cooperative communication system. Background technique [0002] In a cooperative communication system composed of source nodes, relay nodes and destination nodes, fixed relay nodes can be equipped with multiple antennas to provide space diversity to combat channel fading, further reduce the bit error rate of the cooperative communication system, and improve the reliability of wireless links sex. The selection method of multi-antenna relay nodes directly affects the overall performance of the cooperative communication system. [0003] Currently, Opportunistic Multi-antenna Relay Selection (OMRS) and Average Best Multi-antenna Relay Selection (ABRS) are two typical multi-antenna relay selection methods. In the amplify-and-forward cooperative communication system, OMRS selects the relay node with the largest sum o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04W40/22
Inventor 陈甄党冲肖琨
Owner GUANGXI NORMAL UNIV
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