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Multi-user scheduling method and system of full-duplex cache relay system

A multi-user scheduling and relay system technology, applied in the field of multi-user scheduling of full-duplex cache relay system, to achieve high performance and improve throughput

Inactive Publication Date: 2018-08-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional wireless communication technology can only realize that the transceiver of wireless communication equipment can send and receive signals in orthogonal time slots or frequency bands.

Method used

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  • Multi-user scheduling method and system of full-duplex cache relay system
  • Multi-user scheduling method and system of full-duplex cache relay system
  • Multi-user scheduling method and system of full-duplex cache relay system

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Experimental program
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Effect test

Embodiment 1

[0058] The relay is known to have a fixed transmit power at the node, which is P 1i ,P 2i . The relay is based on the known channel fading distribution f 1i (h), f 2i (h) with additive Gaussian white noise variance σ 1i , σ 2i , to calculate the selection parameter λ i . Then, the relay is based on the known instantaneous channel fading h 1i , h 2i , to achieve multi-user scheduling.

[0059] 1. Each user registers resource request information with the relay node. The relay node obtains the number N of user pairs, and divides the cache area, and forms N cache queues corresponding to N pairs of users, with limited capacity and an initial length of B i =0.

[0060] 2. Channel estimation. The relay broadcasts the pilot signal to each household. The relay estimates the channel parameters and obtains the channel fading distribution f 1i (h), f 2i (h).

[0061] 3. The relay acquires system parameters. The relay obtains the sending power P of the node 1i ,P 2i , wi...

Embodiment 2

[0078] The transmission power of the node is variable, that is, P 1i ,P 2i It is distributed by the relay during the operation of the system. The two links corresponding to the i-th pair of users, S i -R, R-D i The upper limit of the sum of power averages is P i (The relay is known before the system officially runs). The relay is based on the known channel fading distribution f 1i (h), f 2i (h) with additive Gaussian white noise variance σ 1i , σ 2i , to calculate the selection parameter λ i . Then, the relay is based on the known instantaneous channel fading h 1i ,h 2i , to achieve multi-user scheduling.

[0079] 1. Each user registers resource request information with the relay node. The relay node obtains the number N of user pairs, and divides the cache area, and forms N cache queues corresponding to N pairs of users, with limited capacity and an initial length of B i =0.

[0080] 2. Channel estimation. The relay broadcasts the pilot signal to each househol...

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Abstract

The invention provides a multi-user scheduling method and system of a full-duplex cache relay system. The multi-user scheduling method comprises the following steps that: a relay node acquires the number N of user pairs according to registration resource request information of users, dividing a cache region, and forming N cache queues corresponding to the N pairs of users, wherein the capacities of the cache queues are limited, and the length Bi is 0 at the very beginning; the relay node broadcasts a pilot signal to all the users, estimates channel parameters and acquires a channel fading distribution situation; and the relay node acquires sending power of each pair of users or an upper limit of a sending power average value and additive Gaussian white noise variances sigma1i and sigma2i,calculates a selection coefficient, and schedules the users according to the calculated selection coefficient. The multi-user scheduling method provided by the invention solves the problem on cache queue scheduling under a multi-user environment in a full-duplex cache relay communication system, effectively uses a multi-user diversity gain of the system, can fully make use of the cache action, andgreatly increases the throughput capacity of the system.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for multi-user scheduling of a full-duplex buffer relay system based on instantaneous state information. Background technique [0002] Full-duplex antenna technology is one of the key technologies for improving spectrum efficiency in future communication systems. Traditional communication systems all work in a half-duplex state, such as Time Division Duplex (TDD) and Frequency Division Duplex (FDD) adopted by the latest fourth-generation 4G wireless communication system. 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 capacity, the next-generation 5G wireless communication system must work in a wider frequency band. The gradual scarcity of spectrum resources pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04W52/46
CPCH04W52/46H04W72/542
Inventor 胡丕河李成夏斌
Owner SHANGHAI JIAO TONG UNIV