第三代短波网多址接入协议的研究与改进  

Research and improvement on CSMA protocol of 3G-HF

作　　者：王翠柏[1] 段田东[1] 郭虹[1] 吴素琴[1] 

机构地区：[1]信息工程大学信息工程学院,河南郑州450002

出　　处：《计算机工程与设计》2010年第24期5192-5195,共4页Computer Engineering and Design

摘　　要：为了解决短波资源有限问题,对短波网络MAC协议进行了研究。针对在短波可利用信道有限时,第三代短波网络MAC协议不能有效解决冲突的问题,提出了一种根据网络节点的重要程度设置不同接入概率的协议改进方法。分析了第三代短波网络多址接入协议,通过仿真研究了该"时隙CSMA"协议产生冲突的原因,然后针对该问题提出了一种有效解决冲突的改进方法。最后,建立了冲突产生的数学模型,在理论上证明了所提出方法的正确性,仿真分析表明了改进方法在解决冲突问题时具有良好的效果。The bandwidth of HF is poor,so it’s very significant to explore the MAC protocol of HF.Aiming at the problem of the 3G-HF network MAC protocol can not effectively solve the issue of conflict when the available for HF channel is limited,an improved pro-tocol is presented.This protocol sets up different access probability according the significant degree of nodes in the network.The protocol of MAC for 3G-HF is firstly studied.Through simulation,the reason of conflict of the ＂slot CSMA＂ protocol is analyzed.And to address the issue an improved method is given.Then a mathematical model for conflict analysis is established,the result in theory is proved correctly for the given algorithm.Through simulation analysis,the effectiveness of improved methods to the conflict resolution is verified in the last.

关 键 词：第三代短波网 多址接入控制 自动链路建立 时隙接入 OPNET 

分 类 号：TN911[电子电信—通信与信息系统]