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arXiv 1202.4865cs.NI
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Jam-X:干扰下的无线协议

Jam-X: Wireless Agreement under Interference

Carlo Alberto Boano, Kay Römer, Marco Antonio Zúñiga, Thiemo Voigt

摘要:

在诸如IEEE 802.15.4之类的传感器网络中使用的无线低功率收发器通常在未经许可的频带中操作,该未经许可的频带受到来自以高得多的功率发射的设备的外部干扰。因此,通信协议的设计应针对此类干扰具有鲁棒性。许多协议在所有层上的关键构建块是在一组节点之间对一条信息达成一致。在MAC层,节点可能需要商定新的时隙或频率信道;在应用层,节点可能需要商定将领导角色从一个节点移交到另一个节点。由干扰引起的消息丢失可能会以两种不同的方式破坏协议:没有节点使用新的信息(时隙,信道,领导者)并坚持先前的分配,或者更糟的是,一些节点使用新的信息,而一些节点不使用。这可能导致性能降低或故障。在本文中,我们调查的干扰下的协议的问题,并指出传统的基于消息的n路握手方法的局限性。我们提出了新的协议,使用干扰,而不是消息传输,并表明他们优于n路握手的协议概率,能源消耗,和时间完成在单播的情况下(两个相邻节点同意),以及在广播的情况下(任何数量的相邻节点同意)。

英文摘要:

Wireless low-power transceivers used in sensor networks such as IEEE 802.15.4 typically operate in unlicensed frequency bands that are subject to external interference from devices transmitting at much higher power. Communication protocols should therefore be designed to be robust against such interference. A critical building block of many protocols at all layers is agreement on a piece of information among a set of nodes. At the MAC layer, nodes may need to agree on a new time slot or frequency channel; at the application layer nodes may need to agree on handing over a leader role from one node to another. Message loss caused by interference may break agreement in two different ways: none of the nodes use the new information (time slot, channel, leader) and stick with the previous assignment, or - even worse - some nodes use the new information and some do not. This may lead to reduced performance or failures. In this paper we investigate the problem of agreement under interference and point out the limitations of the traditional message-based n-way handshake approach. We propose novel protocols that use jamming instead of message transmissions and show that they outperform the n-way handshake in terms of agreement probability, energy consumption, and time-to-completion both in the unicast case (two neighboring nodes agree) as well as in the broadcast case (any number of neighboring nodes agree).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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