A Cross-Layer Serial Interference Cancellation Method Based on Full-duplex Communication in Heterogeneous Networks

Abstract

The invention discloses a cross-layer successive interference cancellation method based on a full-duplex communication in a heterogeneous network, and belongs to the technical field of wireless communications. The method comprises the following steps: acquiring full-duplex micro base station information; verifying the feasibility of successive interference cancellation by the micro base station; calculating a weighted value of an emission signal; transmitting a weighted training signal to a micro user by the micro base station; judging the feasibility of fSICIC (full-duplex assisted successive inter-cell interference cancellation) and feeding back adjustment information and weight; and adjusting the emission signal by the micro base station according to the received adjustment information and weight. The successive interference cancellation technology based on full-duplex provided by the invention can be completed independently only by each micro base station without collaboration of a macro base station, so that the performance of the micro user can be effectively improved on the premise of not reducing the macro user performance. Compared with the existing fICIC (full-duplex assisted inter-cell interference cancellation) technology, the method of the invention can more effectively eliminate strong interferences; and compared with the existing SIC (Successive Interference Cancellation) technology under a half-duplex mode, the method of the invention has a wider applicable scene.

Description

technical field [0001] The invention relates to a cross-layer serial interference deletion technology based on full-duplex communication in a heterogeneous network, and belongs to the technical field of wireless communication. Background technique [0002] By deploying different types of low-power small base stations, such as micro base stations (Micro BSs) and pico base stations (Pico BSs), in a traditional homogeneous network composed of macro base stations (BSs), the heterogeneous network can Significantly improve the capacity and network coverage quality of the cellular system. For the convenience of expression, the low-power small base stations are collectively referred to as micro base stations hereinafter, and the users served by them are referred to as micro users. Compared with the traditional homogeneous network, there is more complex inter-cell interference in the heterogeneous network, especially the high-power macro base station will generate strong cross-layer...

AI Technical Summary

Problems solved by technology

However, because SIC technology needs to solve the interference signal first, it can only be used in limited scenarios such as low data rate of interference users or strong cross-layer interference in traditional half-duplex systems.

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