Interference suppression method of OFDM (Orthogonal Frequency Division Multiplexing) relay network

Abstract

The invention discloses an interference suppression method of an OFDM relay network, which comprises the following steps that: A. user equipment carries out classification and feeds back respective classified information to the access nodes of the user equipment; B. each access node carries out resource allocation of access slot on the user equipment connected with the access node according to the classified information of the user equipment; C. each relay station estimates the required number of resource blocks and feeds back the requirement information of the resource blocks to the base station; and D. the base station carries out the resource allocation of back-transmission slot according to the feedback information of the relay station. The invention can improve the communication quality of the user equipment with poorer transmission quality in a cell while improving the total throughput of a system as much as possible, i.e. the communication rate of an edge user is improved. Moreover, the invention does not need signaling interaction among the access nodes and has low arithmetic complexity, low expenses and very strong practicability.

Description

technical field [0001] The invention relates to broadband wireless communication technology, in particular to an OFDM relay network interference suppression method. Background technique [0002] With the continuous development of broadband wireless communication technology, the demand for ubiquitous wireless services with high speed, wide coverage and large capacity in the future communication network is increasing, which requires not only the use of advanced transmission technology, but also the support of new network architecture . As a result, a new type of low-cost network structure-cooperative relay network was born. Its appearance undoubtedly provides a more feasible way to meet the challenges of greater capacity, higher speed, and wider coverage in the future development of mobile communications. scheme. [0003] The next-generation network architecture based on relay has become a current research hotspot. Through cooperative transmission technology, it can not only...

AI Technical Summary

Problems solved by technology

However, the system using OFDM technology has no downlink interference suppression mechanism in the cell itself, and the introduction of relay stations will increase the number of interference sources. If the frequency reuse factor is 1, the interference level of users will increase. Large, especially for the communication of users located at the edge of the cell will have a great impact

Images