传感网中基于时间帧的信息场变速率模型

Different Rates Dispatching Based on Time Frame Model for Constructing Potential Fields

该文在构造传感器网中的信息位势场时,出于实际应用考虑,提出一种基于时限调度方案的新可变速率方法,可以进一步减少碰撞和提高节能效果。该方法结合CSMA和TDMA功能的同时克服了原有缺点。时隙0作为前一个时隙通知附近节点通信的标志时刻,在前一个时隙发通知信息的时刻,每个节点都精确地知道临近节点的调度信息。此过程采用了多速率和能量调整方法,同时使用可接受速率而非最高速率传输数据来进一步达到节能目的。实验中在一个能量有效数据比率下,数据比率用于动态校正交通负荷类节约能量。实验证明,与Z-MAC相比该文的局部帧预调度和多速率的特点能达到更好的节能效果,在传感器网络中有很好的应用前景。

A novel variable-rate based time frame scheduling scheme is proposed to reduce collisions and save energy in wireless sensor networks. The media access control（MAC） combines carrier sense multiple access（CSMA） and Time division multiple access（TDMA） functionalities, while obviating their drawbacks. Multi-rate and power scaling are adopted to save energy with an acceptable rate rather than the maximum rate. Data rate is dynamically adjusted according to the traffic load of sending nodes in energy efficient data rate to save energy. Compared with Z-MAC, the performance of the proposed scheme has better ability of local framing pre-schedule and multi-rate to achieve better energy efficiency.