Extending the Lifetime of Wireless Sensor Networks Through Mobile Relays
Extending the Lifetime of Wireless Sensor Networks Through Mobile Relays
复制标题
DOI：
10.1109/tnet.2007.906663
复制
发表时间：
2008-10-01
影响因子：
3.7
通讯作者：
Chua, Kee-Chaing
中科院分区：
文献类型：
--
作者：
Wang, Wei;Srinivasan, Vikram;Chua, Kee-Chaing
我们研究了由少量资源丰富的移动中继节点和大量简单静态节点组成的无线传感器网络（WSN）异构架构的好处。移动继电器比静态传感器具有更多的能量。它们可以在网络中动态移动，帮助减轻因高网络流量而承受沉重负担的传感器，从而延长后者的使用寿命。我们首先研究了具有一个移动中继的大型密集网络的性能，并表明网络寿命比纯静态网络提高了四倍。此外，移动中继只需停留在接收器的两跳半径内。然后，我们构建一个联合移动性和路由算法，该算法可以产生接近上限的网络生命周期。该算法的优点是只需要网络中有限数量的节点就可以知道移动中继的位置。我们的模拟结果表明，在随机部署的 WSN 中，一个移动中继至少可以使网络寿命延长一倍。通过将移动中继方法与各种静态能量供应方法进行比较，我们证明了节点移动性对于无线传感器网络中资源供应的重要性。
We investigate the benefits of a heterogeneous architecture for wireless sensor networks (WSNs) composed of a few resource rich mobile relay nodes and a large number of simple static nodes. The mobile relays have more energy than the static sensors. They can dynamically move around the network and help relieve sensors that are heavily burdened by high network traffic, thus extending the latter's lifetime. We first study the performance of a large dense network with one mobile relay and show that network lifetime improves over that of a purely static network by up to a factor of four. Also, the mobile relay needs to stay only within a two-hop radius of the sink. We then construct a joint mobility and routing algorithm which can yield a network lifetime close to the upper bound. The advantage of this algorithm is that it only requires a limited number of nodes in the network to be aware of the location of the mobile relay. Our simulation results show that one mobile relay can at least double the network lifetime in a randomly deployed WSN. By comparing the mobile relay approach with various static energy-provisioning methods, we demonstrate the importance of node mobility for resource provisioning in a WSN.