Optimal relay station placement in IEEE 802.16j networks
IWCMC '07 Proceedings of the 2007 international conference on Wireless communications and mobile computing
Capacity enhancement with relay station placement in wireless cooperative networks
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
NETWORKING'06 Proceedings of the 5th international IFIP-TC6 conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communications Systems
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Wireless Extension Points (EPs) are immobile devices that relay data between the Access Point and the mobile users in a heterogeneous Wireless Local Area Network (WLAN). In this paper, we investigate the optimal placement of EPs such that the throughput capacity of a rectilineal WLAN is maximized. Two channel models are studied, based on the Shannon capacity bound and IEEE 802.11 specifications. We propose an efficient EP placement algorithm that determines the optimal locations of a fixed number of EPs. Our results show that, for a wide range of system parameters, the optimally placed EPs can significantly increase the network throughput capacity. Moreover, we study how the number of EPs, transmission power, path loss exponent, channel models and traffic characteristics affect the optimal EP placement and expected throughput capacity of the network.