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首页> 外文会议>IEEE International symposium on Personal, Indoor, and Mobile Radio Communications >Improving robustness of beacon-enabled IEEE 802.15.4 with Round-Robin channel diversity
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Improving robustness of beacon-enabled IEEE 802.15.4 with Round-Robin channel diversity

机译：通过循环信道分集提高启用信标的IEEE 802.15.4的鲁棒性

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Reliable wireless communication even in adverse conditions is the key for building the energy efficient and dependable Internet of Things. In this paper, we explore the benefits of channel diversity for enabling efficient wireless communication: we propose MRR (Multi-channel Round-Robin), a backward-compatible evolution of beacon-enabled IEEE 802.15.4 in which energy constrained nodes take advantage of additional active periods operating on different channels in a round-robin way. Each active period starts with a beacon sent on a cyclically changing channel, which then allows an associated device to transmit data on the channel used for the beacon. MRR schedules the additional active periods at carefully selected instants to avoid direct beacon collisions. To motivate our work, we first experimentally corroborate previous findings that channel diversity is an effective way of mitigating variable or poor transmission conditions. Then, we observe that channel diversity improves the quality of transmission even better than expected - it appears that wireless sensor nodes have a radiation pattern that changes significantly from one frequency channel to another, which often results in a considerably improved gain when using the right communication channel. The evaluation of the MRR scheme through measurements on a real indoor multihop testbed shows that the proposed scheme results in significantly improved Packet Reception Ratio even without resorting to e.g. channel blacklisting. These results confirm the benefits of multichannel operation and exhibit a fully functional solution that does not add a large overhead compared to using a single channel.
机译：即使在不利条件下，可靠的无线通信也是构建节能高效且可靠的物联网的关键。在本文中，我们探讨了信道分集对于实现高效无线通信的好处：我们提出了MRR（多信道循环），这是信标使能的IEEE 802.15.4的向后兼容演进，其中能量受限的节点利用了循环运行在不同通道上的其他活动时间段。每个活动时间段均以在周期性变化的信道上发送的信标开始，然后允许关联设备在用于信标的信道上传输数据。 MRR在精心选择的时刻安排其他活动时段，以避免直接的信标冲突。为了激励我们的工作，我们首先通过实验证实以前的发现，即信道多样性是缓解可变或较差传输条件的有效方法。然后，我们观察到信道分集可改善传输质量，甚至比预期的要好-似乎无线传感器节点的辐射方向图从一个频道显着变化到另一个频道，当使用正确的通信时，通常会大大提高增益。渠道。通过在真实的室内多跳测试床上进行测量而对MRR方案进行评估的结果表明，即使不诉诸于例如，MRR方案也可以显着提高分组接收率。频道黑名单。这些结果证实了多通道操作的好处，并展示了一种功能完备的解决方案，与使用单个通道相比，该解决方案不会增加大量开销。

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