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arXiv 1402.2707cs.ITmath.IT
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异构蜂窝网络非相干联合传输协作分析

Analysis of Non-Coherent Joint-Transmission Cooperation in Heterogeneous Cellular Networks

Ralph Tanbourgi, Sarabjot Singh, Jeffrey G. Andrews, Friedrich K. Jondral

摘要:

在密集的异构蜂窝网络中,基站协作在干扰管理中起着关键作用。非相干联合传输(JT)由于其低复杂度、较小开销和负载均衡能力而特别吸引人。然而,这种技术的一般分析是困难的,主要是由于缺乏易于处理的模型。本文解决了这一差距,并提出了一个易于处理的模型,用于分析非相干JT在HCN,同时将关键的系统参数,如以用户为中心的BS集群和信道相关的合作激活。假设每一层的所有BS遵循平稳泊松点过程,非相干JT的覆盖概率推导。使用开发的模型,它示出,对于小小区BS的小协作集群,由小小区的非相干JT提供频谱效率增益,而不显着增加小区负载。此外,当协作被积极触发时,小型小区内的簇内频率重用优于簇内协调调度。

英文摘要:

Base station (BS) cooperation is set to play a key role in managing interference in dense heterogeneous cellular networks (HCNs). Non-coherent joint transmission (JT) is particularly appealing due to its low complexity, smaller overhead, and ability for load balancing. However, a general analysis of this technique is difficult mostly due to the lack of tractable models. This paper addresses this gap and presents a tractable model for analyzing non-coherent JT in HCNs, while incorporating key system parameters such as user-centric BS clustering and channel-dependent cooperation activation. Assuming all BSs of each tier follow a stationary Poisson point process, the coverage probability for non-coherent JT is derived. Using the developed model, it is shown that for small cooperative clusters of small-cell BSs, non-coherent JT by small cells provides spectral efficiency gains without significantly increasing cell load. Further, when cooperation is aggressively triggered intra-cluster frequency reuse within small cells is favorable over intra-cluster coordinated scheduling.

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