Jinghui Xie, Xiaogang Chen, Yuan Zhu, Hongwen Yang, Liyun Dai
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引用次数: 0
摘要
针对LTE-A Rel-11中异构网络等部署类型，研究了CoMP(协调多点)传输和接收。本文主要研究不同传输点CRS频移不同的下行联合传输中CRS (cell-specific reference signal)/PDSCH (Physical Downlink Shared Channel [12]) RE (resource element)碰撞。由于速率匹配的CRS抑制方案会降低PDSCH的吞吐量，我们提出在联合传输点的CRS碰撞PDSCH REs上额外发送一个PDSCH RE。在终端使用CRS- ic (CRS干扰消除)接收机时，该方案在链路级仿真中比CRS抑制具有显著的吞吐量增益。此外，与速率匹配方案相比，这种新方法不会对传统UE的干扰测量产生负面影响。
A Novel Method to Solve CRS/PDSCH RE Collision in Joint Transmission in LTE-A
CoMP (Coordinated multi-point) transmission and reception has been studied for deployment types such as heterogeneous networks in LTE-A Rel-11. In this paper, we focus on the CRS (cell-specific reference signal)/PDSCH (Physical Downlink Shared Channel [12]) RE (resource element) collision in downlink joint transmission where different transmission points have different CRS frequency shifts. Since CRS muting scheme with rate matching decreases PDSCH throughput, we propose to send an additional PDSCH RE over the CRS collided PDSCH REs from joint transmission points. With CRS-IC (CRS interference canceling) receiver at UE, this scheme has significant throughput gain over CRS muting in the link level simulation. In addition, this new approach doesn't have negative impact on legacy UE's interference measurements compared with the rate matching scheme.
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