A Comp-based Dynamic Inter-Cell Interference Coordination Method in Dense Heterogeneous Networks

Abstract

The present invention provides an interference coordination method among dynamic cells in a dense heterogeneous network based on CoMP. The method comprises the following steps: 1) obtaining an optimal LP-ABS low-power silent subframe ratio, and obtaining the optimal transmission power of a Macro site in the LP-ABS state, wherein the emission power applied to the Macro site determines whether the LP-ABS proportion optimization is executed or not in the LP-ABS state; 2) determining the cooperative user set of a microcell according to the interference condition of real users in the current period, and determining whether the users need perform cooperative multi-point transmission or not; 3) a user device measures signal receiving power between the user device and each adjacent cell through adoption of a dynamic cooperative multi-point selection strategy based on the reference signal receiving power, and then selecting a cell having the best signal receiving power except service cells as a cooperative cell; and 4) employing a dynamic cooperative resource distribution strategy to be applied to the next dispatching cycle. The interference coordination method among dynamic cells in the dense heterogeneous network based on the CoMP is able to improve the whole throughput of microcells, solve the interference problems among microcells and enhance the utilization rate of frequency spectrum.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a CoMP-based dynamic inter-cell interference coordination method in a dense heterogeneous cellular network. Background technique [0002] With the development of wireless communication networks, the future wireless network is evolving towards network intelligence, broadband, diversification and integration. With the popularization of smart terminals, data services will experience explosive growth. A dense heterogeneous network can improve network coverage, greatly increase system capacity, and offload services, enabling more flexible network deployment and more efficient frequency reuse. In the future, for high-frequency bands and large bandwidths, a more dense network solution will be adopted, and more than 100 small cells / sectors will be deployed. [0003] At the same time, the increasingly dense network deployment also makes the network topology more complex, and ...

AI Technical Summary

Problems solved by technology

[0005] But at this time, the distribution of micro cells in the heterogeneous cellular network is quite dense, and each sector has eight to ten micro base stations. At this time, the interference between micro base stations will become particularly serious, but the traditional ABS mechanism can solve the problem. It is the interference of macro cells to micro cells, but the interference between micro cells is rarely considered

However, facing the dense heterogeneous network in the future, the interference between cells will become more and more serious, and it is difficult for traditional solutions to meet the speed requirements of micro users

Therefore, only the use of ABS technology cannot completely solve the interference problem of future dense networks

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