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Half-duplex/full-duplex hybrid transmission method of cognitive relay network

A cognitive relay, half-duplex technology, applied in the field of wireless communication, can solve the problems of undisclosed half-duplex/full-duplex hybrid transmission methods and the like

Inactive Publication Date: 2015-11-04
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some methods of full-duplex transmission in cognitive relay networks disclosed, revealing the impact of self-interference on throughput and outage probability, but there is no disclosure of half-duplex / full-duplex hybrid transmission methods in cognitive relay networks

Method used

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  • Half-duplex/full-duplex hybrid transmission method of cognitive relay network
  • Half-duplex/full-duplex hybrid transmission method of cognitive relay network
  • Half-duplex/full-duplex hybrid transmission method of cognitive relay network

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Embodiment Construction

[0018] Such as figure 1 As shown, the cognitive relay network includes a pair of authorized user transmitter PT and receiver PR, and a pair of unlicensed user transmitter ST and receiver SR. All nodes are full-duplex, ST is equipped with a transmitting antenna and a receiving antenna, other sites are equipped with only one antenna. During half-duplex transmission, a relay transmission frame is divided into two equal time slots. At time slot 1, the user transmitter PT is authorized to transmit with power P p send a signal x p (t) to the receiver PR while the signal is received by the unauthorized user transmitter ST and receiver SR. In time slot 2, the unlicensed user transmitter ST will receive the signal and its own transmitted signal x s (t) combined to get the combined signal x c (t), and then amplify and forward the combined signal to the receiver SR, and at the same time authorize the user receiver PR to receive the signal. The amplification gain at the unlicensed u...

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PUM

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Abstract

The invention discloses a half-duplex / full-duplex hybrid transmission method of cognitive relay network. The method comprises the steps that: when the power of full-duplex self interference is lower than a threshold, full-duplex transmission is employed, and otherwise half-duplex transmission is employed; in a half-duplex transmission process, one relay transmission frame is divided into two equal time intervals; and in a full-duplex transmission process, time interval division is not carried out on each relay transmission frame. According to the invention, the power of self interference is switched between the half-duplex transmission and the full-duplex transmission, so that the throughput advantage of the full-duplex transmission is utilized, and the bad influences of the self interference on the throughput performance is decreased, so that the method is suitable for a heterogeneous network.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a half-duplex / full-duplex hybrid transmission method of a cognitive relay network. Background technique [0002] Cognitive relay networks have potential application value in the field of heterogeneous networks. In a heterogeneous network, many different types of wireless nodes work in the same area and have different priorities. High-priority nodes are allocated authorized frequency bands, and low-priority nodes act as relays to assist high-priority nodes to transmit data in order to obtain communication opportunities, while sharing frequency bands to transmit their own data. [0003] In the past, it was generally believed that sending and receiving cannot be carried out at the same time during relay communication, that is, only half-duplex mode can be adopted. With the development of interference cancellation technology, it is gradually realized that full-duplex...

Claims

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Application Information

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IPC IPC(8): H04L5/16H04L5/14
CPCH04L5/16H04L5/14
Inventor 陈宏滨谭松高
Owner GUILIN UNIV OF ELECTRONIC TECH
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