Blind relay selection method based on random access in large-scale relay network

Abstract

The invention discloses a method for blind relay selection based on random access in a large-scale relay network. The method mainly solves the problems that in the prior art, under the conditions of lacking and even having no relay information, a high-performance relay cannot be selected quickly, and the achieving complexity is high. The technical scheme is that a source node broadcasts user need information to a relay node; the relay node begins to detect whether the relay node can meet the user need information; if the relay node can meet the user need information, a piece of response information is sent to the source node, or else the relay keeps silent; the source node uses an energy detector to recognize available relays; the available relay randomly selects an available relay for the source node by using a time slot ALOHA mode; and the source node transmits data information through the selected available relay. The method can alleviate network expenses, reduce the information requirements for the relay, and can be used for the large-scale relay network which is provided with plenty of non-characteristic relays and lacks relay information collecting means.

Description

technical field [0001] The invention belongs to the field of wireless communication, and particularly relates to a blind relay selection method, which is suitable for a large-scale relay network with a large number of non-specific relays and lack of means for collecting relay information. Background technique [0002] Cooperative relay technology is an emerging technology that applies cooperative relays to wireless networks. It can provide reliable data transmission services for users with poor channel environments, improve the transmission rate and reliability of wireless channels, increase the coverage of the system and the robustness of the system, and not only reduce the complexity of the system without increasing the complexity of the system. The power consumption and bandwidth of the terminal are improved, and the spectral efficiency, throughput and capacity of the system can be significantly improved. There is currently a lot of related work investigating relay selec...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that users are difficult to collect relay real-time information due to its large-scale and blind node characteristics in a large-scale relay network, and propose a blind relay selection method based on random access to reduce a large number of High collision probability due to competition between relays, meeting the requirements of multi-hop scenarios

Images