Distributed Proportional Fair Scheduling for IEEE802.11 Wireless LANs |
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Authors: | Hyung-Kun Park |
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Affiliation: | (1) Signal Theory and Communications Department, Technical University of Catalonia (UPC), Barcelona, Spain;(2) Telecommunications Technological Centre of Catalonia (CTTC), Barcelona, Spain |
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Abstract: | In the time varying wireless channel, opportunistic scheduling is one of the important techniques to achieving the rich diversities
inherent in wireless communications. However, most existing scheduling schemes require centralized scheduling and little work
has been done on developing distributed algorithms The proportional fair scheduling is one of the representative opportunistic
scheduling for centralized networks. In this paper, we propose distributed proportional fair scheduling (DPFS) scheme for
wireless LAN network. In the proposed DPFS scheme, each receiver estimates channel condition and calculates independently
its own priority with probabilistic manner, which can reduce excessive probing overhead required to gather the channel conditions
of all receivers. We evaluate the proposed DPFS using extensive simulation and simulation results show that DPFS obtains higher
network throughput than conventional scheduling schemes while maintaining fairness among users. |
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