A Method for Downlink Interference Mitigation Based on Distributed Channel Allocation

Abstract

The invention discloses a method for distributing downlink interference mitigation based on a distributed channel. According to the method, channel state information of each family base station to a user who the family base station serves is obtained, and relevant parameters are initialized; each family base station repeatedly updates an iterations counter and a strategy counter of itself according to the surrounding interference condition; each family base station selects a channel set which is used finally to achieve mitigation of in-layer interference when the number of updating times reaches a preset threshold value. According to the method, a distributed channel distributing scheme is adopted, a center control node does not need to be introduced, cost for operation maintenance is reduced, and self-organization and self-optimization of an isomerous cellular network are achieved; channel state information or other information interaction among smallcells are not needed, and complexity for realization is greatly reduced; each family base station selects a proper channel for transmission intellectually and dynamically according to measured interference, and therefore the overall capacity of the network is improved on the premise that self capacity is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method for mitigating downlink interference based on distributed channel allocation. Background technique [0002] With the emergence of smart terminals, wireless users gradually increase their demand for indoor high-speed data services. In order to meet this requirement, users can independently deploy femtocells and build small cells, such as femtocells, in macro cells. This method does not require the operator to deploy new sites, so that it can improve the utilization rate of spectrum resources of the cellular system and increase the capacity of the network without increasing its capital investment. In such a heterogeneous cellular network, users' autonomous network deployment makes it difficult to effectively implement traditional centralized cellular network planning, which leads to serious interference problems in the network. [0003] The het...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a method for alleviating downlink interference based on distributed channel allocation, which aims to solve the problem of high implementation complexity in existing methods for intra-layer interference mitigation and the inability to ensure that heterogeneous cellular networks can obtain higher overall capacity problem

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