Interference management method and device in heterogenous network

Abstract

The invention discloses an interference management method and a device in a heterogenous network. The method comprises the steps of determining respectively reference signal received quality (RSRQ) of base stations and RSRQ of low-power nodes, comparing the ratio between the RSRQ of the base stations and the RSRQ of the low-power nodes with a set threshold value, and performing an interference management on user equipment (UE) in accordance with a comparison result. The method and the device can reduce remarkably interference among cells through resource allocation, power control and configuration of control channels on the premise that communication quality of the base stations and the low-power nodes is guaranteed, guarantee the support for downward compatible / non-downward compatible UE by setting all resource element (RE) control channel information on a main carrier / auxiliary carrier, implement a novel UE cell selection and switch strategy through RSRQ reference values of the base stations and the low-power nodes so as to prevent low-power node auxiliary (or service) UE from being reduced remarkably, and, through a RSRQ weighting mode, solve the problem of interference among the cells caused by the fact that resource elements of control channels cannot perform effective power control when spreading all over system bandwidths.

Description

technical field [0001] The present invention relates to interference management technology, in particular to an interference management method and device in a heterogeneous network. Background technique [0002] In the next-generation broadband wireless communication network, how to support larger bandwidth becomes a key factor to improve the throughput of user terminals between cells and the average throughput of user terminals. [0003] At present, in the Long Term Evolution (LTE, Long Term Evolution) system of the Third Generation Partnership Project, it is proposed to use carrier aggregation to support larger bandwidth, so as to meet the requirements of throughput, peak rate and other indicators in the new generation of wireless standards. . Carrier aggregation is a key technology to support larger bandwidth in future wireless communication systems. It aggregates different carriers to form carriers with larger bandwidth, and supports user equipment (UE, User Equipment)...

AI Technical Summary

Problems solved by technology

Since the transmit power of the low-power node is very low, the UE will be preferentially selected and accessed to the macro cell, so that the number of UEs attached to (or served by) the low-power node will be significantly reduced, and the service area will be significantly reduced;

[0007] (3) Traditional interference management or avoidance methods and strategies cannot be applied to control channels. The main reason is that resource elements (RE, Resource Element) (that is, Physical Control Format Indicator (PCFICH) CHannel), physical downlink control channel (PDCCH, Physical Downlink Control CHannel), physical HARQ indicator channel (PHICH, Physical Hybrid-ARQ Indicator CHannel)) throughout the entire system bandwidth

[0008] Still do not have the relevant technical scheme that solves above-mentioned technical problem at present

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