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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >An Energy-Efficient Slotted Sense Multiple Access Broadcast Protocol for Reliable Command Delivery in Dynamic Wireless Sensor Networks
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An Energy-Efficient Slotted Sense Multiple Access Broadcast Protocol for Reliable Command Delivery in Dynamic Wireless Sensor Networks

机译：动态无线传感器网络中可靠命令传递的节能缝隙感知多路访问广播协议

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In industrial monitoring and control applications, a server often has to send a command to a node or group of nodes in wireless sensor networks. Flooding achieves high reliability of message delivery by allowing nodes to take the redundancy of receiving the identical message multiple times. However, nodes consume much energy due to this redundancy and the long duty cycle. A reliable slotted broadcast protocol (RSBP) tackles this problem by allocating a distinct broadcast slot (BS) to every node using a tree topology. Not only does it remove collision, but it also minimizes energy consumption such that every node remains active only during its parent’s broadcast slot and its own broadcast slot to receive and rebroadcast a message, respectively. However, it suffers from low reliability in harsh environments due to the compete removal of redundancy and low responsiveness to the changes in network topology due to the global scheduling of slots. Our approach allocates one distinct broadcast sharable slot (BSS) to each tree level, thus making a BSS schedule topology-independent. Then, nodes at the same level compete to rebroadcast a message to nodes at one level higher within the BSS, thus allowing the redundancy. In addition, it uses a slot-scheduled transmission within BSS that can further improve reliability by reducing message collisions and also enables the precise management of energy. According to simulations and experiments, the proposed approach can achieve high reliability comparable to flooding and low-energy consumption comparable to RSBP.
机译：在工业监控应用中，服务器通常必须向无线传感器网络中的一个节点或一组节点发送命令。洪泛允许节点采取多次接收相同消息的冗余措施，从而实现了消息传递的高度可靠性。但是，由于这种冗余和长占空比，节点会消耗大量能量。可靠的时隙广播协议（RSBP）通过使用树形拓扑为每个节点分配不同的广播时隙（BS）来解决此问题。它不仅可以消除冲突，而且还可以最大程度地减少能耗，从而使每个节点仅在其父节点的广播时隙和其自身的广播时隙分别接收和转发消息时才保持活动状态。然而，由于竞争性地去除了冗余以及由于时隙的全局调度而导致的对网络拓扑的变化的低响应性，它在恶劣环境中遭受了低可靠性。我们的方法为每个树级别分配了一个不同的广播共享时隙（BSS），从而使BSS调度与拓扑无关。然后，处于同一级别的节点竞争将消息重新广播到BSS内处于更高级别的节点，从而实现了冗余。此外，它在BSS中使用时隙调度的传输，可以通过减少消息冲突来进一步提高可靠性，并且还可以进行精确的能量管理。根据仿真和实验，所提出的方法可以实现与洪水相比高的可靠性和与RSBP相当的低能耗。

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