摘要
随着计算机网络技术的不断发展,无线局域网得到了广泛的应用。由于在无线信道中,通信环境不稳定,用户间分组冲突及分组误帧经常发生,造成了网络性能的下降。为了改善上述现象,提出了一种基于信道预约及信道感知的复合多址接入协议,即CA-DIBCR(Channel Awareness-Distributed In-Band Channel Reservation)。协议通过预约及感知信道来减少分组冲突及误帧的发生,从而提高网络的性能。利用OPNET仿真工具对CA-DIBCR进行了仿真,结果表明方案对网络吞吐量以及平均分组时延等性能指标均有明显改进,使得网络资源得到更加充分的利用。因此,CA-DIBCR算法是一种能有效提高无线网络性能的多址接入算法。
With the development of computer networks, wireless LAN is widely used. Because the wireless channel is unstable, packet collisions between mobile users and packet error frequently happen. Therefore, the performance of WLAN decreases dramatically. A new MAC protocol based on the mechanisms of channel reservation and channel awareness called CA-DIBCR （ Channel Awareness - Distributed In - Band Channel Reservation） is proposed to improve the performance of WLAN. It improves the performance of WLAN by combining channel reservation with channel awareness, to reduce the packet collision rate and packet error rate. Extensive simulations by OPNET show that the throughput and the average packet delay are significantly improved by using the proposed CA - DIBCR. Therefore, CA - DIBCR is a MAC protocol by which the performance of WLAN can be improved efficiently.
出处
《计算机仿真》
CSCD
北大核心
2009年第8期132-136,共5页
Computer Simulation
基金
国家自然科学基金项目(60572144)
教育部新世纪优秀人才支持计划(NCET-06-0876)
留学归国启动基金项目
西北工业大学青年创新基金项目(W016207)
西北工业大学基础研究基金项目(W018105)共同资助
