Research on Joint Interference Coordination Approach in Ultra-dense Heterogeneous Network
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摘要:
针对5G超密集异构网中严重的跨层干扰问题，该文提出一种基于现有的增强型小区间干扰协调技术和协同多点传输技术的联合干扰协调方法。运用随机几何理论工具推导了两层超密集异构网下用户的中断概率，频谱效率和网络平均遍历容量表达式。仿真结果表明：该文提出的联合的干扰协调方案，相比于传统协同多点传输技术，不仅降低了协作用户数目，同时使得用户在信干比阈值为0 dB时的中断概率降低了15%；相比较于增强型小区间干扰协调技术，在偏置值为10 dB时，扩展区域的用户频谱效率改善为35%，整个网络平均遍历容量提升了3.4%。
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关键词:
- 异构网络 /
- 随机几何理论 /
- 增强型小区间干扰协调 /
- 协同多点传输
Abstract:This paper presents an approach of combining the existing enhanced inter-cell interference coordination technology and the downlink joint transmission scheme of coordinated multi-point transmission technology to solve the problem of serious cross-layer interference in 5G ultra-dense heterogeneous network. With using tools from stochastic geometry theory, the expressions such as the outage probability, spectrum efficiency and network average ergodic capacity of two-layer ultra-dense heterogeneous network are derived. Simulation results show that the proposed joint interference coordination scheme not only reduces the number of cooperative users compared with the traditional coordinated multi-point transmission technology, but also reduces the outage probability of users by 15% in the network at 0 dB. Compared with the enhanced inter-cell interference coordination technology, when the bias value is 10 dB, the user spectrum efficiency in the extended area is improved to 35% and the average traversal capacity of the entire network is increased by 3.4%.
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