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首页> 外文期刊>International journal of autonomous and adaptive communications systems >CH-CSMA/CA: a MAC protocol for asynchronous channel hopping rendezvous in 802.11 DCF-based cognitive radio networks
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CH-CSMA/CA: a MAC protocol for asynchronous channel hopping rendezvous in 802.11 DCF-based cognitive radio networks

机译：CH-CSMA / CA：一种用于基于802.11 DCF的认知无线电网络中的异步信道跳跃集合的MAC协议

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摘要

Blind rendezvous paradigm recently expedites the approach to the control channel establishment problem in cognitive radio networks. As a result, many novel asynchronous channel hopping (CH) rendezvous schemes are proposed for realising blind rendezvous in these years. However, how to integrate these asynchronous CH rendezvous schemes with CSMA/CA MAC has not been researched so far. In this paper, we propose a CH rendezvous-based CSMA/CA MAC (named CH-CSMA/CA) to work with existing asynchronous CH rendezvous schemes by tailoring mechanisms of 802.11 DCF to the slotted operation manner of these rendezvous schemes. Moreover, we identify that the channel busy-time inconsistency problem unique to CH-CSMA/CAMAC design is caused by virtual carrier sensing (VCS) mechanism of 802.11 DCF, and an enhanced virtual carrier sensing (EVCS) mechanism is proposed to alleviate its impact on networking performance (i.e., channel access delay and throughput). Extensive simulation results verify the effectiveness of our MAC design.
机译：盲集合点范式最近加速了认知无线电网络中控制信道建立问题的方法。结果，近年来提出了许多新颖的异步信道跳变（CH）集合方案来实现盲集合。但是，到目前为止，尚未研究如何将这些异步CH会合方案与CSMA / CA MAC集成在一起。在本文中，我们提出了一种基于CH集合点的CSMA / CA MAC（称为CH-CSMA / CA），以通过将802.11 DCF的机制调整为这些集合点计划的时隙操作方式来与这些现有的异步CH集合点计划一起工作。此外，我们发现CH-CSMA / CAMAC设计独特的信道繁忙时间不一致问题是由802.11 DCF的虚拟载波侦听（VCS）机制引起的，并提出了一种增强的虚拟载波侦听（EVCS）机制来减轻其影响。网络性能（即通道访问延迟和吞吐量）。大量的仿真结果证明了我们MAC设计的有效性。

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