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A MAC protocol to support hybrid antennas in a wireless LAN

  • Published:
Journal of Electronics (China)

Abstract

Hybrid Distributed Coordination Function (HDCF), a modified medium access control protocol of IEEE 802.11 standard, is proposed in this paper to support both smart adaptive array antennas and normal omni-directional antennas simultaneously in one wireless LAN. Omni-directional antennas follow the standard Distributed Coordination Function (DCF) and smart antennas follow the Directional DCF (DDCF). The proposed DDCF is based on Hybrid Virtual Carrier Sense (HVCS) mechanism, which includes Omni-directional Request-To-Send/Clear-To-Send (ORTS/OCTS) hand-shake mechanism and directional data transmission. HDCF is compatible with DCF. When a node transmits in a directional beam, the other nodes can multiplex the physical channel. Hence, HDCF supports Space Division Multiple Access (SDMA). Simulation results show that HDCF can support hybrid antennas effectively and provide much higher network throughput and lower delay and jitter than DCF does.

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Author information

Authors and Affiliations

  1. State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an, 710071, China

    Zhao Liqiang, Zhang Hailin & Liu Yi

Authors
  1. Zhao Liqiang
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  2. Zhang Hailin
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  3. Liu Yi
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Corresponding author

Correspondence to Zhao Liqiang.

Additional information

Communication author: Zhao Liqiang, born in 1971, male, Ph.D., associate professor. State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China.

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Zhao, L., Zhang, H. & Liu, Y. A MAC protocol to support hybrid antennas in a wireless LAN. J. of Electron.(China) 24, 309–315 (2007). https://doi.org/10.1007/s11767-005-0213-8

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  • DOI: https://doi.org/10.1007/s11767-005-0213-8

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