Inteference Coordination Technology In Heterogeneous Wireless Network

As mobile internet develops, people require higher demand of service range and speed.3GPP is doing a more comprehensive research and standardization work of SON network, CoMP and carrier aggregation directions in LTE-A technology. In today’s wireless heterogeneous network deployment a large number of low-power nodes are introduces, including Pico cell, Femto cell and other low-power base stations for signal relay. The scenario of interference in tiered heterogeneous network brings new challenges different from traditional mobile networks. Since the introduction of a large number of low-power base stations, the scenario of network topology and interference are becoming more complicated. So the analysis and proper coordination of heterogeneous network about layer and cross-layer interference problems are needed.This paper describes interference coordination techniques in accordance with the same frequency, different manufacturers and different frequencies. It proposes low-power node interference-aware technology solutions and the low-power nodes dynamically allocate resource through this program with base macro station together to achieve optimal overall system interference avoidance, using sub frame offset to inhibit the ping-pong effect of low-power nodes of different resource allocations. It proposes the Interference coordination scheme based on graph theory and use graph theory to establish the position of the interference graph in order to achieve the refinement of the source of interference. The paper designs the resource scheduling algorithm corresponding to the interference graph to achieve a match between different frequencies and users of different levels. The paper gives detailed analysis and simulations on part of frequency reuse schemes. It gives interference mitigation schemes based on carrier aggregation. It gives a detailed analysis and simulation verification on time division interference coordination techniques of elCIC in R10. It gives analysis on interference suppression scheme of coordinated multipoint transmission technology. It analyzes the interference suppression scheme of high-density network.