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为了评估LTE-A系统中X2接口时延对多点协作传输(CoMP)技术的实施所带来的影响,建立了有时延的系统信道模型,搭建了非零时延CoMP技术的系统级仿真平台,仿真了3种典型的CoMP方案.分析了系统性能、协商复杂度以及时延敏感程度的关系,指出系统性能随着时延的增加而急剧下降,系统对时延的敏感度随着协商复杂度的提高而增加,在回程时延大到一定值时,CoMP技术便不再适用于LTE-A系统.
In order to evaluate the impact of X2 interface delay on the implementation of Multipoint Coordinated Transmission (CoMP) technology in LTE-A system, a system channel model with time delay is established and a system-level simulation platform with non-zero delay CoMP technology is built , Three kinds of typical CoMP schemes are simulated.The relationship between system performance, negotiation complexity and delay sensitivity is analyzed, and the performance of the system is sharply decreased with the increase of delay. The sensitivity of the system to delay increases with the complexity of negotiation However, CoMP technology is no longer suitable for LTE-A systems when the backhaul delay reaches a certain value.