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Relay selection method based on adaptive power transmission

A technology of power transmission and self-adaptation, applied in the field of mobile communication, can solve the problems of not considering power self-adaptation and power factors, etc., and achieve the effect of improving user satisfaction, balancing load and improving power efficiency

Inactive Publication Date: 2016-08-03
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, increasing the power can increase the capacity to a certain extent, so it is necessary to consider power and rate adaptation in the relay selection algorithm, but the existing relay selection algorithms rarely involve this field
Existing relay selection algorithms usually consider selecting the relay link with the best channel conditions for transmission, without considering the power factor, or considering the relay selection of equal power consumption, that is, considering the fairness of relay selection, but not considering the power factor. adaptive problem

Method used

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  • Relay selection method based on adaptive power transmission
  • Relay selection method based on adaptive power transmission
  • Relay selection method based on adaptive power transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The cooperative communication system consists of one source node, three battery-powered relay nodes and one destination node, and relay node 1, relay node 2 and relay node 3 are used to distinguish different relays. The cooperation is divided into two time slots. In the first time slot, the nodes broadcast data, and in the second time slot, the selected relay node relays the data to the destination node.

[0026] Using the Rayleigh fading channel, the average SNR on each relay link (including source node-relay node link and relay node-destination node link) is by the formula Solve to get

[0027] Set α = 1, P max = 10, the real-time signal-to-noise ratios of the users on each relay link are estimated to be γ 11 =10 1.2 , gamma 21 =10 1.7 ,γ 12 =10 1.56 , gamma 22 =10 1.36 ,γ13 =10 1.6 , gamma 23 =10 1.86 , according to the formula Solving for κ 1 = 3, that is, relay node 3 should be selected for data forwarding.

Embodiment 2

[0029] The cooperative communication system consists of one source node, three grid-powered relay nodes, and one destination node. Relay nodes 4, 5, and 6 are used to distinguish different relays. The cooperation is divided into two time slots. In the first time slot, the nodes broadcast data, and in the second time slot, the selected relay node relays the data to the destination node.

[0030] Using the Rayleigh fading channel, the average SNR of each relay link is After measurement and calculation, the node loads of relay node 4, relay node 5 and relay node 6 are respectively

[0031] Set β=1, and the real-time signal-to-noise ratios of users on each relay link are estimated to be γ 14 =10 1.4 ,γ 24 =10 1.2 , gamma 15 =10 1.7 ,γ 25 =10 1.5 , gamma 16 =10 1.52 ,γ 26 =10 1.6 . Therefore, according to the formula Solving for κ 2 =6, that is, relay node 6 should be selected for data forwarding.

Embodiment 3

[0033] The cooperative communication system consists of 1 source node, 3 battery-powered relay nodes, 3 grid-powered relay nodes, and 1 destination node. Relay node 1, relay node 2, and relay node 3 represent the battery The relay nodes for power supply are represented by relay node 4 , relay node 5 and relay node 6 as relay nodes for grid power supply. The cooperation is divided into two time slots. In the first time slot, the nodes broadcast data, and in the second time slot, the selected relay node relays the data to the destination node.

[0034] Using the Rayleigh fading channel, the average SNR on each relay link (including source node-relay node link and relay node-destination node link) is

[0035] by the formula Solve to get

[0036] After measurement and calculation, the real-time signal-to-noise ratios of users on each relay link are respectively γ 11 =10 1.2 , gamma 21 =10 1.7 ,γ 12 =10 1.56 , gamma 22 =10 1.36 ,γ 13 =10 1.6 , gamma 23 =10...

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Abstract

The invention discloses a relay selection method based on adaptive power transmission, wherein the adaptive power transmission is applied to a relay selection method, thereby facilitating improvement of the system capacity; two policies, including optimal power and velocity self-adaptation and power self-adaptation under channel inversion, are respectively considered, thereby providing beneficial thoughts for the design of the relay selection method; based on self adaptation, the fairness of relay selection is considered, equivalent signal noise ratio is defined, and the self-adaptation is applied to relay selection, thereby facilitating the balancing of network node loads; and when a mobile user is utilized as a relay node, the user satisfaction can be improved.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a relay selection method based on adaptive power transmission. Background technique [0002] In a cooperative communication system, the quality of communication performance is related to the selection of relay nodes. Metrics to measure relay selection performance usually include capacity and outage probability. Capacity can be measured to some extent by the maximum data rate. Generally speaking, increasing power can increase capacity to a certain extent, so it is necessary to consider power and rate adaptation in relay selection algorithms, but existing relay selection algorithms seldom involve this field. Existing relay selection algorithms usually consider selecting the relay link with the best channel conditions for transmission, without considering the power factor, or considering the relay selection of equal power consumption, that is, considering the fairness...

Claims

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Application Information

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IPC IPC(8): H04W40/04H04W40/08H04W40/22
CPCH04W40/04H04W40/08H04W40/22Y02D30/70
Inventor 肖琨何花
Owner GUANGXI NORMAL UNIV
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