基于多信道跳频的Ad Hoc网络MAC层协议研究

基于多信道跳频的Ad Hoc网络MAC层协议研究-Re earch on the MAC Layer Protocol of Ad Hoc Network Ba ed on Multi_channel and Hopping Schemes

摘要采用多信道接入协议有效地解决了Ad Hoc 网络中经常存在的站点隐藏和站点暴露等问题。将多信道分成控制频道和数据频道组，每个数据频道组均含有两个备用频道供跳频使用。控制频道上使用的载波监听多路访问/ 冲突避免（CSMA/ CA）机制和RTS/ CTS/ Broad 机制控制信息量较少，占用控制频道的时间也很短，所以在控制频道上基本可以避免数据冲突。数据频道组采用重发和跳频机制可以多路数据并行发送而互不干扰，增加了Ad Hoc 网络的鲁棒性和高效性。
关键词 CSMA/ CA RTS/ CTS/ Broad  多信道 重发机制 跳频机制
Abstract In Ad Hoc networks，the problem of hidden-and exposed-terminal exists often. In this paper，the multi-channel access protocol method is introduced
to solve the problems. The channels are divided into control channels and data channels.Each data channel group owns two spare channels for frequency hopping.
On control channels，there is less information and using CSMA/ CA and RTS/ CTS/ Broad schemes，the time occupied is very short，so no data collision
exists in general. On data channels，by using resending and frequency hopping mechanisms，multiple data can be transmitted in parallel without disturbance in
each other. The robustness and effectiveness of Ad Hoc network are enhanced.
Keywords CSMA/ CA RTS/ CTS/ Broad Multi-channel Resending mechanism Frequency hopping mechanism