设计和评价的可靠数据传输协议在无线传感器网络

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无线(一般网络(WSAN)模式是由传感器和致动器模式相互连接的无线网络。一个传感器节点收集信息在物理世界和在无线网络发送感知价值。另一个传感器节点将感知价值提供一个执行器节点转发。传感器节点可以提供消息只感觉到值附近节点由于疲软的收音机。消息由传感器节点转发到一个执行器节点类型的洪水协议。传感器模式感官事件和感知价值发送一条消息。此外,在收到一条消息,该消息带有一个从另一个传感器感知价值模式中,一个传感器节点转发感觉值。由传感器节点传播消息可能会丢失,由于噪声和碰撞。在本文中,我们讨论一个冗余数据传输(RT)协议可靠高效地交付感觉到感觉到通过传感器节点执行器节点值。这里,传感器节点发送一个消息,不仅其感知价值也感觉到来自其他传感器节点的值。 The more number of sensed values are included in a message, the more frequently the message is lost. Each message carries so many number of sensed values that the message loss ratio is not increased. Even if a message with a sensed value v is lost in the wireless network, an actuator node can receive the sensed value v from a message sent by another sensor node. Thus, each sensed value is redundantly carried in multiple messages. The redundancy of a sensed value is in nature increased since the sensed value is broadcast. In order to reduce the redundancy of sensed value, we take a strategy that the farther sensor nodes from an actuator node forward the fewer number of sensed values. We evaluate the RT protocol in terms of loss ratio, redundancy, and delay time of a sensed value. We show that about 80% of sensed values can be delivered to an actuator node even if 95% of messages are lost due to noise and collision.

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