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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2009, Vol. 10 Issue (6): 828-833    DOI: 10.1631/jzus.A0820514
Electrical & Electronic Engineering     
Enhanced power saving mechanism for supporting multicast services in 802.11 wireless LANs
Yong HE, Rui-xi YUAN, Xiao-jun MA, Jun LI
Center for Intelligent & Networked Systems, Tsinghua University, Beijing 100084, China; Thomson Broadband, R&D, Co., Ltd, Beijing 100085, China
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Abstract  Traditional 802.11 power saving mechanism (PSM) treats multicast and broadcast traffic equally, and suffers significant performance degradation with multicast background traffic. This paper proposes an enhanced PSM that effectively differentiates multicast streams. It re-arranges the virtual bitmap of the traffic indication map (TIM) to carry traffic status for multicast groups and introduces a concept of sequential transmission of multi-addressed data to facilitate differentiation among multicast groups. Our analysis shows that the enhanced PSM can effectively save power in mixed traffic environments.

Key words802.11      Wireless network      Power saving      Multicast services     
Received: 05 July 2008     
CLC:  TN92  
Cite this article:

Yong HE, Rui-xi YUAN, Xiao-jun MA, Jun LI. Enhanced power saving mechanism for supporting multicast services in 802.11 wireless LANs. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(6): 828-833.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0820514     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2009/V10/I6/828

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