Enabling robust and reliable transmission in Internet of Things with multiple gateways
Enabling robust and reliable transmission in Internet of Things with multiple gateways
复制标题
通过多个网关实现物联网中稳健可靠的传输
DOI：
10.1016/j.comnet.2018.09.020
复制
发表时间：
2018
影响因子：
5.6
通讯作者：
Fang Dingyi
中科院分区：
文献类型：
--
作者：
Xu Dan;Jiao Wenli;Yin Zhuang;Wu Bin;Peng Yao;Chen Xiaojiang∗（通讯作者）;Chen Feng;Fang Dingyi
研究了部署多网关的物联网应用中的健壮性和可靠性传输问题。我们发现，具有最佳链路质量的可靠路由路径并不总是获得可靠传输。主要原因是现有的大多数路由度量通常没有考虑网关的工作状态。并且当网关在可变占空比下操作时(例如，由于从环境中收集的能量不足)，它们在最后一跳的数据传输的可靠性可能显著降低。最后一跳的数据丢失会导致前一跳的传输效率低下。针对这一问题，我们提出了一种新的路由度量ETD(Expect Transfer Direction，ETD)，它通过估计网关的工作状态，在可变占空比的IoT中有效地选择一组合适的网关，提高了可靠性。在ETD的基础上，设计了一种高效的机会路由协议PoR来保证数据的可靠传输。我们的仿真结果证明了PoR的优越性能。实验结果表明，PoR协议即使在最差的网络环境下也能达到98%以上的报文投递率，并能在所选网关之间实现有效的负载均衡。
This paper investigates the robust and reliable transmission problem in Internet of Things (IoT) applications, where multiple gateways are deployed. We discover that the reliable routing path with the best link qualities may not always gain the reliable transmission. The main reason is that the majority of existing routing metrics generally do not consider the working state of gateways. And the gateways may significantly reduce the reliability of data transmission at the last hop when they operate at the variable duty cycles (e.g., due to insufficient energy harvesting from ambiance). Last-hop data loss will lead to the inefficient transmission in all previous hops. To address this issue, we propose a novel routing metricETD(Expected Transmission Direction,ETD), which efficiently selects a proper set of gateways with improved reliability in variable duty-cycledIoTthrough estimating the working state of gateways. Based onETD, we design an efficient opportunistic routing protocolPoRto ensure reliable data transmission. Our simulations demonstrate the superior performance ofPoR. It is shown thatPoRachieves over 98% packet delivery ratio even in the worst network setting, with effective load balancing among selected gateways.