摘要
在adhoc移动自组网中,隐藏终端和暴露终端问题严重影响着MAC层的网络吞吐量性能。为了更好的解决隐藏/暴露终端问题,文献[3,4]提出了一种信道接入方法,即联合检测法。论文对此算法进行了改进,对RTS/CTS控制分组采用了载波侦听/冲突检测(CSMA/CD)策略,而对数据分组采用了基于发射端的码分配法。通过理论分析和仿真,表明提出的信道接入策略可获得较大吞吐量增益。
In ad hoc networks, hidden-and the exposed-terminal problems can severely reduce the system throughput in MAC layer. To address these problems, a channel access method exploiting joint detection of overlapping packets is proposed by Kota in [3]]. In this paper, we propose an improvement on the method, which uses CSMA/CD medium access protocol for the RTS/CTS control packets and transmitter-based code assignment for spreading the data packets. The performance of the proposed channel access method has been investigated by analysis and computer simulations in comparison with Kota＇ s and Nagaraj＇s scheme proposed in [3] and [4]. The results show that our proposed channel access method gives a significant improvement in system throughput.
出处
《自动化与仪器仪表》
2010年第2期123-124,共2页
Automation & Instrumentation
基金
轨道交通控制与安全国家重点实验室(北京交通大学)开放课题基金资助(RCS2008K004)
关键词
移动自组网
信道接入
联合检测
吞吐量
Ad hoc networks
Medium access control
Joint detection
Throughput
