Impact of Power Control on Capacity of TDM-Scheduled Wireless Mesh Networks
Impact of Power Control on Capacity of TDM-Scheduled Wireless Mesh Networks
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DOI：
10.1109/icc.2011.5962410
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发表时间：
2011-06
期刊：
影响因子：
--
通讯作者：
Parth H. Pathak;R. Dutta
中科院分区：
文献类型：
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作者：
Parth H. Pathak;R. Dutta
本文将功率控制作为无线网状网络中的网络层问题进行研究。节点间的网络连通性是由节点间的通信范围决定的，而通信范围又可以通过调节发射功率来控制。人们普遍认为，将节点的传输功率水平降低到保持连接所需的最小值总是会增加网络容量。在这项工作中，我们表明，尽管这对于基于CSMA/CA的介质访问是正确的，但在许多情况下，当链路是tdm调度时，增加节点的功率水平可能是有益的。基于分析和模拟，可以观察到，在许多代表性的流量模式和拓扑中，增加节点的功率水平（减少路由路径中的跳数）会导致吞吐量的增加。我们描述了不同拓扑结构和交通模式下可实现的空间重用和容量。随着越来越多的MAC协议采用TDMA方法，本文给出的结果对于理解不同级别的网络连接如何影响容量至关重要。
In this paper, we consider power control as network layer problem in wireless mesh networks. The network connectivity between nodes is determined by their communication range which in turn can be controlled by adjusting the transmit power level. It is generally acknowledged that reducing transmit power levels of nodes to the minimum required to retain connectivity always increases network capacity. In this work, we show that though this is true for CSMA/CA based medium access, increasing power level of nodes can be beneficial in many cases when links are TDM-scheduled. Based on analysis and simulations, it is observed that increasing power levels of nodes (and decreasing number of hops in routing paths) results in increase of throughput in many representative traffic patterns and topologies. We characterize achievable spatial reuse and capacity with respect to power control in different topologies and traffic patterns. With increasing number of MAC protocols adopting TDMA approach, results presented here can be crucial in understanding how capacity is affected with varying levels of network connectivity.