基于多信道跳頻的Ad Hoc網絡MAC層協議研究-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協議有效地解決了Ad Hoc 網絡中經常存在的站點隱藏和站點暴露等問題。將多信道分成控制頻道和數據頻道組，每個數據頻道組均含有兩個備用頻道供跳頻使用。控制頻道上使用的載波監聽多路訪問/ 沖突避免（CSMA/ CA）機制和RTS/ CTS/ Broad 機制控制信息量較少，占用控制頻道的時間也很短，所以在控制頻道上基本可以避免數據沖突。數據頻道組采用重發和跳頻機制可以多路數據并行發送而互不干擾，增加了Ad Hoc 網絡的魯棒性和高效性。
關鍵詞 CSMA/ CA RTS/ CTS/ Broad? 多信道 重發機制 跳頻機制
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