Downlink interference elimination method based on carrier waves in hybrid network

Abstract

The invention provides a downlink interference elimination method based on carrier waves in a hybrid network. The method comprises the steps that an OAM initially configurates protected resources of each cell in advance, namely a certain carrier wave is determined to be a first-choice Pcell of a user belonging to each cell, and a base station of each cell knows initial configuration information of the protected resources of an adjacent cell; the base station of each cell configurates protected weights of the usable carrier waves of the cells, the weights of the initial configuration protected resources are not changed, the weights of the remaining useable carrier waves are determined according to protected weight information of each carrier wave of the adjacent cell and the load of each carrier wave of the adjacent cell, and when the configuration information and the load of the carrier waves of the adjacent cell are changed, the weights of the usable carrier waves are changed; the protected weight configuration information and the load information of each carrier wave of the cells are intersected among the cells; the Pcell and the Scell of the user belonging to each cell are configurated according to the weights of the protected resources of each cell and the position information of the user in each cell. According to the downlink interference elimination method based on the carrier waves in the hybrid network, the hybrid downlink interference is effectively reduced, the limited spectrum resources are fully utilized, and service jamming on the carrier waves is avoided.

Description

technical field [0001] The invention belongs to the technical field of fourth-generation mobile communication networks, and relates to an interference elimination method, in particular to a carrier-based downlink interference elimination method in a hybrid network. Background technique [0002] In future mobile communication systems, there will be application scenarios of hybrid networks, that is, within the well-planned cellular network coverage formed by macro base stations, there will be multiple low-power base station LPN coverage. When there are repeated coverage of macro base stations and LPNs in some areas, a multi-layer network (that is, a hybrid network) is formed. A focus of research in hybrid nets is how to perform interference suppression. Existing research proposes various interference suppression methods based on carrier aggregation and non-carrier aggregation respectively. This patent mainly studies carrier-based interference cancellation methods for hybrid ...

AI Technical Summary

Problems solved by technology

The above interference cancellation method based on carrier configuration mainly uses the useful information exchanged between cells to reasonably configure the Pcell (Primary Cell, primary cell) and Scell ​​(Secondary Cell, secondary cell) of its own users, so that users use different spectrum resources to Eliminate downlink interference in hybrid networks. However, the existing carrier-based interference elimination methods are not perfect, and they have shortcomings in effective information exchange and optimal allocation and selection of spectrum resources between cells.

Method 1 above is a passive method. After detecting interference and reconfiguring resources, the purpose of interference elimination may not be achieved; method 2 is only applicable to scenarios where the protected resources remain unchanged; method 3 does not consider the load of the carrier The situation is likely to cause traffic congestion

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