Opportunistic packet scheduling in OFDM distributed antenna systems

Authors:
Wenjun Xu;Zhiqiang He;Kai Niu
Affiliations:
School of Information and Communication Engineering, Beijing University of Posts & Telecommunications, Beijing, China;School of Information and Communication Engineering, Beijing University of Posts & Telecommunications, Beijing, China;School of Information and Communication Engineering, Beijing University of Posts & Telecommunications, Beijing, China
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

Citing 5
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Abstract

Opportunistic packet scheduling optimization problem in orthogonal frequency division multiplexing (OFDM) distributed antenna systems (DAS) is investigated by this paper. Physical-layer channel state information (CSI) and wireless links' requirements for bit error rate are taken into account during problem formulation. The optimization aim is to minimize packet loss rate (PLR) subject to limited wireless resource, which is characterized by power, subcarrier, antenna et al. According to the characteristics of users' packet queues as well as CSI, the proposed algorithm adaptively allocates wireless resource to users to exploit as much spatial and multiuser diversity as possible. Simulation results show the proposed algorithm achieves the lowest PLR in all compared algorithms. Further more, the proposed circular DAS significantly outperforms co-located antenna systems (CAS) due to distributed antenna deployment.