摘要： 针对无线多跳网络大干扰范围下的暴露终端问题及无线介质访问控制(MAC)协议的多源干扰叠加现象，提出一种基于双忙音信号的可调功率MAC协议——非对称双忙音(ADBT)协议，包括BT-CTS/BT-ACK机制和BAE算法2种解决方案。基于OPNET平台建立仿真模型用于比较分布式协调功能、DBTMA、VPDBT 和ADBT四种协议的性能，实验结果证明，ADBT能在大干扰范围下更有效地避免分组冲突，提高信道利用率。
关键词:
无线多跳网络,
双忙音,
大干扰范围,
介质访问控制,
IEEE 802.11标准
Abstract: Aiming at the exposed terminal problem and multiple interference signal accumulation phenomenon of Media Access Control(MAC) protocol in the environment with large interference range of wireless multi-hop network, this paper proposes a MAC protocol with adjustable power called Asymmetrical Dual Busy Tone(ADBT), which is based on dual busy tone and includes BT-CTS/BT-ACK mechanism and Blocking Area Estimation(BAE) algorithm. The network performances of Distributed Coordination Function(DCF), DBTMA, VPDBT and ADBT are compared via OPNET-based simulation experiments. Experimental results verify that ADBT is able to prevent packet collisions effectively and improve the channel utilization.
Key words:
wireless multi-hop network,
dual busy tone,
large interference range,
Media Access Control(MAC),
IEEE 802.11
中图分类号:
刘科, 冷甦鹏. 可调功率双忙音无线MAC协议[J]. 计算机工程, 2010, 36(12): 129-132.
LIU Ke, LENG Su-Feng. Dual Busy Tone Wireless MAC Protocols with Adjustable Power[J]. Computer Engineering, 2010, 36(12): 129-132.