研究LTE-A下行CoMP调度技术.针对系统负载差异的场景,说明单一CoMP调度模式的缺陷;同时针对2类CoMP技术,给出相应地提高小区边缘和小区整体吞吐量的调度策略.通过理论分析和系统级仿真验证,研究系统负载对调度策略性能的影响,最后提出一种能自适应于非均衡负载的CoMP调度策略.综合评估表明,CoMP联合传输在低负载下和CoMP协调调度在高负载下均具有较优性能,而优化策略复杂度低,且能适应系统负载变化,可进一步提高系统性能.
We focus on the downlink CoMP scheduling technologies of LTE-A. The defects of single CoMP scheduling mode with different system loads are presented. Two scheduling strategies for improving cell throughput are presented. The impact of system load on the performance of different scheduling strategies is studied by performing theoretical analysis and system-level simulation followed by the proposed strategy. The results show that the performance of CoMP technologies is good for different loads and that the proposed optimized scheduling can adapt to them with low complexity, which can lead to a further performance improvement.
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