Distributed ultra-dense heterogeneous network interference coordination method based on non-cooperative game

Abstract

The invention discloses a distributed ultra-dense heterogeneous network interference coordination method based on a non-cooperative game. A network interference problem is modeled as a non-cooperative game problem by analyzing a dynamic feature of an ultra-dense network, cells in the network are used as game participants, and autointerference is minimized to be a utility function. In order to deduce existence of a Nash equilibrium solution, building of a game model is deduced into a potential game problem, and a feedback method based on random learning is provided accordingly to solve the Nash equilibrium solution. According to the method, a probability matrix is built according to the utility function of each cell for each time of iteration, and the final Nash equilibrium solution is acquired by continuously updating the probability matrix. According to the method provided by the invention, the closed-form solution can achieved by convergence without information exchange between the cells, so that at last the whole network interference is minimal, when all the cells are converged to the Nash equilibrium solution, network capacity is improved, and the requirement of dynamic variation of user speed is met, and the difficulty among network densification, network capacity and spectrum efficiency is effectively solved with relatively low complexity.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a wireless resource management method in a wireless communication system, and more specifically, relates to an interference coordination method in a non-cooperative game-based distributed ultra-dense heterogeneous network. Background technique [0002] An ultra-dense heterogeneous network in which low-power small cells are densely deployed at the same frequency within the coverage area of ​​macro cells is an effective method proposed by 3GPP (Third Generation Partnership Project) to improve the spectrum utilization and network capacity of 5G networks. However, the increase in the density of small cells will increase the inter-cell interference, which will limit the improvement of the entire network capacity, and at the same time, the call quality of users at the edge of the cell will be seriously affected. Moreover, each cell base station and cell users in the actual n...

AI Technical Summary

Problems solved by technology

However, the existing interference coordination scheme cannot effectively solve the problem of the difference in rate requests caused by different service types between users, and requires a large number of signaling exchanges

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