用于Ad Hoc网络的分布式功率控制

摘要

在带宽有限且范围面积大的AdHoc网络中，为了对覆盖区域内的信息进行采集、处理和传递，需要考虑多跳传输。然而，多跳传榆会增加节点间的相互干扰，且造成能量消耗不均衡等问题，因此如何减少节点冲突，提高能量效率，成为AdHoc网络面临的重要问题。本文主要研究分布式功率控制，在保证通信质量的前提下，尽量降低信号的发射功率，减少发送节点对邻近节点的干扰，提高信道的空间复用度。最后通过OPNET建立网络模型进行仿真，结果表明该机制的有效性，它可以最小化每比特能量消耗，减少网络冲突，从而改进网络性能。%In order to achieve information collection,processing and transmission in the coverage area,it needs to consider multi-hop transmission for large coverage area in bandwidth-limited Ad Hoc network;However, the multi-hop transmission will increase the interference between nodes,and cause the unbalanced energy consumption,so how to reduce nodes in the conflict and improve energy efficiancy,has become the important issues of Ad Hoc Network.In this paper,we study the distributed power control.In the promise to ensure communication quality, it can minimize signal transmission power to reduce sending node interference with adjacent nodes,and improve the channel space complex in degrees.The results of a simulation model analyzed by OPNET show the effectiveness of mechanism.It can minimize the energy consumption per bit,reduce network conflicts,and improve network performance.