Capacity of Hybrid Wireless Networks with Directional Antenna and Delay Constraint
Capacity of Hybrid Wireless Networks with Directional Antenna and Delay Constraint
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DOI：
10.1109/tcomm.2010.07.090330
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发表时间：
2010-07
影响因子：
8.3
通讯作者：
Guanglin Zhang;Youyun Xu;Xinbing Wang;M. Guizani
中科院分区：
文献类型：
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作者：
Guanglin Zhang;Youyun Xu;Xinbing Wang;M. Guizani
我们研究了带有定向天线的混合无线网络的吞吐量。该混合无线网络由n个随机分布的节点和m个规则放置的基站通过光链路连接而成。我们研究了在L最大跳数资源分配下，当每个节点配备定向天线时的自组织模式吞吐量。也就是说，源节点只有在L跳数内的正常节点的帮助下才能传输到其目的地。否则，传输将在基础设施模式下进行，即在基站的帮助下进行。我们发现，混合无线网络的吞吐量很大程度上取决于最大跳数L、基站数目m和定向天线θ的波束宽度。假设网络的总带宽W比特/秒被分成三个部分，即用于自组织模式的W<sup>1</sup>、用于基础设施模式的上行链路的W<sup>2</sup>、以及用于基础设施模式的下行链路的W<sup>3</sup>。我们证明了混合定向无线网络的吞吐量容量为Θ(NW<sup>1</sup>1<sup>2</sup>/θ<sup>2</sup>)+Θ(MW<sup>2</sup>2<sup>2</sup>，如果L=Ω(n<sup>1/3</sup>/θ<sup>4/3<sup>log<sup>2/3<sup>n)；和Θ((θ<sup>2<sup>2</sup>2<sup>2</sup><sup>2</sup>n)；以及+Θ(MW<sup>2</sup>2<sup>2</sup>n)，如果L=o(n<sup>1/3</sup>/θ<sup>4/3<sup>2<sup>2</sup>n)。最后，分析了L、m和θ对混合网络吞吐量的影响。
We study the throughput capacity of hybrid wireless networks with a directional antenna. The hybrid wireless network consists of n randomly distributed nodes equipped with a directional antenna, and m regularly placed base stations connected by optical links. We investigate the ad hoc mode throughput capacity when each node is equipped with a directional antenna under an L-maximum-hop resource allocation. That is, a source node transmits to its destination only with the help of normal nodes within L hops. Otherwise, the transmission will be carried out in the infrastructure mode, i.e., with the help of base stations. We find that the throughput capacity of a hybrid wireless network greatly depends on the maximum hop L, the number of base stations m, and the beamwidth of directional antenna θ. Assuming the total bandwidth W bits/sec of the network is split into three parts, i.e., W<sub>1</sub> for ad hoc mode, W<sub>2</sub> for uplink in the infrastructure mode, and W<sub>3</sub> for downlink in the infrastructure mode. We show that the throughput capacity of the hybrid directional wireless network is Θ(nW<sub>1</sub>/θ<sup>2</sup> L log n) + Θ(mW<sub>2</sub>), if L = Ω(n<sup>1/3</sup>/θ<sup>4/3</sup> log<sup>2/3</sup> n); and Θ((θ<sup>2</sup>L<sup>2</sup> log<sup>2/3</sup> n); and + Θ(mW<sub>2</sub>), if L = o(n<sup>1/3</sup>/θ<sup>4/3</sup> log<sup>2/3</sup> n), respectively. Finally, we analyze the impact of L, m and θ on the throughput capacity of the hybrid networks.