摘要
本文提出了一种基于CDMA扩频码的组播MAC协议,该协议对不同组播的数据使用不同的CDMA扩频码来传输,同时扩展了RTS控制帧、CTS控制帧和ACK控制帧的格式,使其能够为组播数据提供保障机制,以保证组播数据的可靠传递。仿真结果证明,相比于IEEE802.11MAC协议,该协议在网络吞吐量方面有了不错的提高,延迟方面也改进不少。
A multicast MAC protocol based on CDMA codes is proposed in this paper to provide highly reliable multicast. Different mulficast data are transmitted with different CDMA codes in our protocol. RTS control frame, CTS control frame and ACK control frame are modified to provide reliable mechanism for the multicast data. The simulation results show that our protocol is able to improve the network performances in terms of throughput and delay in comparison with the original IEEE 802.11 MAC protocol.
出处
《计算机与网络》
2009年第3期109-111,115,共4页
Computer & Network
基金
国家高新技术研究院发展计划(863计划)--多跳无线组织网络协议体系设计与跨层优化
关键词
CDMA扩频码
无线自组网
组播
MAC协议
MMPC协议
CDMA spread-spectrum code
ad hoc
multicast
medium access control
multicast MAC protocol based on CDMA
