Carrier-based Downlink Interference Elimination Method in Hybrid Network

Abstract

The present invention provides a carrier-based downlink interference elimination method in a hybrid network, including: OAM initially pre-configures the protected resources of each cell, that is, determines that a certain carrier is the preferred Pcell of the subordinate users of the cell, and the base stations of each cell know that adjacent cells are protected The initial configuration information of resources; the base station of each cell configures the weight of the protected carrier available in its own cell, and the weight of the initially configured protected resource does not change, and the weight of the remaining available carriers is determined according to the protected weight information of each carrier in the adjacent cell and its load , when the carrier configuration information and load of adjacent cells change, the weight of the available carrier will change accordingly; the protected weight configuration information and load information of each carrier in each cell are exchanged between the cells; The Pcell and Scell ​​of the home user are configured in the location information of the cell. The invention effectively reduces the downlink interference of the hybrid network, fully utilizes limited frequency spectrum resources, and avoids service congestion on the carrier.

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 elimination 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, several existing carrier-based interference cancellation 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

Images