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Front. Inform. Technol. Electron. Eng.  2014, Vol. 15 Issue (6): 470-481    DOI: 10.1631/jzus.C1300269
    
Reliable beacon transmission based MAC protocol for LR-WPANs over WLAN interferences
Ji-Hoon Park, Byung-Seo Kim
ITO Business Division, Nongshim Data System, Seoul 156-709, Korea; Department of Computer and Information Communications Engineering, Hongik University, Sejongsi 339-701, Korea
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Abstract  The use of IEEE 802.15.4 standard based application systems has been rapidly increasing, for example, in medical services, sensor networks, public safety systems, and home automation systems. However, issues arise from the fact that IEEE 802.15.4 standard based low rate wireless personal area networks (LR-WPANs) use the same frequency bands as wireless local area networks (WLANs), and they interfere with each other. Based on past research on this issue, the interference has a more serious impact on LR-WPANs’ performance than on WLANs’ performance. In this paper we propose a method to improve LR-WPANs’ performance while coexisting with WLANs, which is called the reliable beacon transmission based medium access control (MAC) protocol. Since the reliability of a beacon frame is important, in this method, only the beacon frame is transmitted in interference-free channels, and the data packets are transmitted in interfered channels instead of abandoning the channels altogether. This method increases the reliability of beacon frames as well as overall channel utilizations. The effectiveness of the proposed method was evaluated through extensive simulations, and this paper proves that this method improves the performance of IEEE 802.15.4 based wireless sensor networks (WSNs) over WLANs’ interferences.

Key words： Low rate wireless personal area network (LR-WPAN)      Interference      Wireless local area network (WLAN)      Beacon     
Received: 29 September 2013      Published: 06 June 2014
CLC:  TN925  
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Ji-Hoon Park, Byung-Seo Kim. Reliable beacon transmission based MAC protocol for LR-WPANs over WLAN interferences. Front. Inform. Technol. Electron. Eng., 2014, 15(6): 470-481.

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http://www.zjujournals.com/xueshu/fitee/10.1631/jzus.C1300269     OR     http://www.zjujournals.com/xueshu/fitee/Y2014/V15/I6/470


无线局域网干扰下低速无线个人区域网络中基于可靠信标传输的介质访问控制协议

研究目的：近年来，基于IEEE 802.15.4标准的应用增加迅猛，如医疗服务、传感器网络、公共安全系统和家庭自动化系统。然而，基于IEEE 802.15.4标准的低速无线个人区域网络与无线局域网使用相同频带，两者相互干扰。已有研究显示，这种干扰对低速无线个人区域网络性能的影响较之无线局域网更为严重。本文提出一种基于可靠信标传输的介质访问控制协议，以改进低速无线个人区域网络在与无线局域网共存时的性能。
方法提亮：鉴于该协议中信标帧的可靠性十分重要，在抗干扰通道中只传输信标帧，在受干扰通道内传输数据包而非完全放弃通道。该方法在提升通道利用率的同时提高了信标帧的可靠性。
重要结论：大量仿真结果显示了该方法的有效性。该方法提升了基于IEEE 802.15.4标准的低速无线个人区域网络在受到无线局域网干扰情况下的性能。

关键词： 低速无线个人区域网络,  干扰,  无线局域网,  信标 
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