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Multi-user selection method for full-duplex two-way relay system based on instantaneous state information

An instantaneous state, two-way relay technology, applied in the field of multi-user selection, to achieve the effect of reducing interruption probability, low operation complexity, and ensuring fairness

Active Publication Date: 2018-11-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the user scheduling problem in the multi-user environment of the full-duplex two-way relay system

Method used

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  • Multi-user selection method for full-duplex two-way relay system based on instantaneous state information
  • Multi-user selection method for full-duplex two-way relay system based on instantaneous state information
  • Multi-user selection method for full-duplex two-way relay system based on instantaneous state information

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] For only transient state information h 1i , h 2i Available conditions, the user scheduling method of the present invention is as follows:

[0048] 1. First 2N user nodes A working in full-duplex state i ,B i , i=1,2,...,N, send registration information to the relay node R, the registration information includes the destination node to be communicated by each user node, and the relay node R pairs 2N user nodes into N communication nodes according to the registration information User pairs, after successful registration according to the registration information, form a full-duplex two-way multi-user relay system. Among them, user node A i with user node B i for a communication user pair;

[0049] 2. In the above-mentioned full-duplex two-way multi-user relay system, at the beginning of each time slot, all N communication users send pilot signals to the relay node R, and the relay node R receives the pilot signal according to the received pilot signal. The frequency ...

Embodiment 2

[0054] For instantaneous state information h 1i , h 2i can be obtained, in addition to the transmit power P of the user pair s , self-interference cancellation capability k s , the minimum transmission rate r of the system can be obtained, the scheduling method adopted by the present invention is as follows:

[0055] 1. First 2N user nodes A working in full-duplex state i ,B i , i=1,2,...,N, send registration information to the relay node R, the registration information includes the destination node to be communicated by each user node, and the relay node R pairs 2N user nodes into N communication nodes according to the registration information User pairs, after successful registration according to the registration information, form a full-duplex two-way multi-user relay system. user node A i with user node B i for a communication user pair;

[0056] 2. In the full-duplex two-way multi-user relay system, at the beginning of each time slot, each user node sends a pilot ...

Embodiment 3

[0067] In this embodiment, in the instantaneous state information h 1i , h 2i If it is available, judge whether it is possible to obtain the transmit power P of the user node s , the self-interference cancellation capability k of the user node s , the minimum transmission rate r of the full-duplex two-way multi-user relay system; if available, use the scheduling method of Embodiment 2 to schedule users; if not available, use the scheduling method of Embodiment 1 to schedule users.

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Abstract

The invention provides a multi-user selection method of a full duplex both-way relay system based on instantaneous state information and a communication system. Two corresponding user scheduling methods are designed by use of a forwarding decoding protocol based on the case that the instantaneous system state information is available; one of the two scheduling methods possesses the lowest system implementation complexity, while the other one possesses the optimal interruption performance. In actual deployment, the corresponding scheduling methods can be selected according to different practical situations. The multi-user selection method is capable of effectively reducing the system interruption probability and solving the problem of too high interruption probability in the full duplex system; meanwhile, the equity between users can be ensured and the service quality of the system can be improved.

Description

technical field [0001] The invention relates to a multi-user selection method, in particular to a multi-user selection method and a communication system of a full-duplex two-way relay system based on instantaneous state information. Background technique [0002] With the rapid development of science and technology, wireless communication technology has also made great progress. At the same time, higher indicators have been put forward for wireless communication systems. Traditional communication systems all work in half-duplex state, such as the latest fourth-generation 4G wireless communication. Time division duplex (T i me D i v i the s i on Duplex, TDD) and Frequency Division Duplex (Frequency D i v i the s i onDuplex, FDD). The half-duplex mode implements self-interference cancellation through the orthogonality of time slots or frequency bands, but there is a problem of low spectral efficiency. In order to achieve a 1000X increase in transmission rate and system ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/22
CPCH04W40/22Y02D30/70
Inventor 李成夏斌陈智勇王亚飞杨晨晨
Owner SHANGHAI JIAO TONG UNIV