arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0811.0726cs.ITmath.IT
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在具有基础设施的无线网络中改进容量扩展

Improved Capacity Scaling in Wireless Networks With Infrastructure

Won-Yong Shin, Sang-Woon Jeon, Natasha Devroye, Mai H. Vu, Sae-Young Chung, Yong H. Lee, Vahid Tarokh

摘要:

本文分析了基础设施支持的影响和好处,在提高吞吐量缩放网络中的$n$随机定位的无线节点。该基础设施使用多天线基站(BS),其中BS的数量和每个BS处的天线的数量可以相对于$n$以任意速率缩放。在该模型下,分析了密集网络和扩展网络的容量缩放定律。两个基于BS的路由方案首先介绍了在这项研究中:一个基础设施支持的单跳(ISH)路由协议与多址上行链路和广播下行链路和基础设施支持的多跳(IMH)路由协议。然后,他们可实现的吞吐量缩放进行了分析。这些计划进行了比较,对两个传统的计划没有BS:多跳(MH)传输和分层合作(HC)计划。结果表明,在密集的网络中实现了线性的吞吐量缩放,在没有BS的帮助的情况下。相比之下,所提出的基于BS的路由方案,可以在现实的网络条件下,在扩展网络的吞吐量缩放显着提高。增益来自这些基于BS的协议的以下优点。首先,如果基站的数量和天线的数量足够大,则与MH方案相比,在所提出的方案中可以有更多的节点同时发送。第二,通过提高长距离信噪比(SNR),接收信号功率可以大于HC的接收信号功率,从而在扩展网络下实现更好的吞吐量缩放。此外,通过推导相应的信息理论割集上界,它是在扩展网络下,四个计划IMH,ISH,MH和HC的组合是在所有操作制度的顺序最优。

英文摘要:

This paper analyzes the impact and benefits of infrastructure support in improving the throughput scaling in networks of $n$ randomly located wireless nodes. The infrastructure uses multi-antenna base stations (BSs), in which the number of BSs and the number of antennas at each BS can scale at arbitrary rates relative to $n$. Under the model, capacity scaling laws are analyzed for both dense and extended networks. Two BS-based routing schemes are first introduced in this study: an infrastructure-supported single-hop (ISH) routing protocol with multiple-access uplink and broadcast downlink and an infrastructure-supported multi-hop (IMH) routing protocol. Then, their achievable throughput scalings are analyzed. These schemes are compared against two conventional schemes without BSs: the multi-hop (MH) transmission and hierarchical cooperation (HC) schemes. It is shown that a linear throughput scaling is achieved in dense networks, as in the case without help of BSs. In contrast, the proposed BS-based routing schemes can, under realistic network conditions, improve the throughput scaling significantly in extended networks. The gain comes from the following advantages of these BS-based protocols. First, more nodes can transmit simultaneously in the proposed scheme than in the MH scheme if the number of BSs and the number of antennas are large enough. Second, by improving the long-distance signal-to-noise ratio (SNR), the received signal power can be larger than that of the HC, enabling a better throughput scaling under extended networks. Furthermore, by deriving the corresponding information-theoretic cut-set upper bounds, it is shown under extended networks that a combination of four schemes IMH, ISH, MH, and HC is order-optimal in all operating regimes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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