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arXiv 1307.7249cs.ITmath.IT
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超密集无线网络中的接入点密度和带宽划分

Access Point Density and Bandwidth Partitioning in Ultra Dense Wireless Networks

Stelios Stefanatos, Angeliki Alexiou

摘要:

本文探讨了随机部署的,干扰有限的,密集的无线网络的性能上的系统参数,如接入点密度和带宽划分的影响。虽然已经取得了很大的进展,在分析随机部署的网络通过工具从随机几何,大多数现有的作品或者假设一个非常大的用户密度相比,接入点,不持有在一个密集的网络,和/或只考虑用户信号干扰比作为系统的品质因数,它只提供部分洞察用户速率,多址接入的影响被忽略。在本文中,用户速率分布得到解析,考虑到多址接入以及SIR中断的影响。结果表明,用户速率中断概率取决于带宽分区(子信道)的数量和它们被利用的多址方案的方式。对于大接入点密度的情况,最优分区数是下界的。此外,提供一个渐进的小速率中断概率所需的最小接入点密度的上限提供封闭的形式。

英文摘要:

This paper examines the impact of system parameters such as access point density and bandwidth partitioning on the performance of randomly deployed, interference-limited, dense wireless networks. While much progress has been achieved in analyzing randomly deployed networks via tools from stochastic geometry, most existing works either assume a very large user density compared to that of access points which does not hold in a dense network, and/or consider only the user signal-to-interference-ratio as the system figure of merit which provides only partial insight on user rate, as the effect of multiple access is ignored. In this paper, the user rate distribution is obtained analytically, taking into account the effects of multiple access as well as the SIR outage. It is shown that user rate outage probability is dependent on the number of bandwidth partitions (subchannels) and the way they are utilized by the multiple access scheme. The optimal number of partitions is lower bounded for the case of large access point density. In addition, an upper bound of the minimum access point density required to provide an asymptotically small rate outage probability is provided in closed form.

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