Asynchronous Quorum-Based Blind Rendezvous Schemes for Cognitive Radio Networks
Asynchronous Quorum-Based Blind Rendezvous Schemes for Cognitive Radio Networks
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DOI：
10.1109/tcomm.2015.2508803
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发表时间：
2016-03
影响因子：
8.3
通讯作者：
J. Sheu;Chih-Wei Su;Guey-Yun Chang
中科院分区：
文献类型：
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作者：
J. Sheu;Chih-Wei Su;Guey-Yun Chang
在认知无线电网络中，未授权用户[次级用户（SU）]需要在建立通信链路之前在授权信道上会合。专用公共控制信道是实现交会的最简单方法。然而，由于授权用户[主用户（PU）]在接入授权信道上的绝对优先级，专用公共控制信道可能导致PU长时间阻塞问题，以及在高SU密度环境中的控制信道饱和问题。已经提出了信道跳频方案来避免上述问题。在本文中，我们介绍了两个基于群体的信道跳变方案。我们的方案在四个指标方面表现出色：最大会合时间、信道负载、会合程度和最大条件会合时间。
In cognitive radio networks, unlicensed users [secondary users (SU)] need to rendezvous on licensed channels before establishing communication links. Dedicated common control channel is the simplest way to achieve rendezvous. However, due to the absolute priority of licensed users [primary users (PU)] on accessing licensed channels, a dedicated common control channel may cause the PU long-time blocking problem, and the control channel saturation problem in a high SU density environment. Channel hopping schemes have been proposed to avoid the problems mentioned above. In this paper, we introduce two quorum-based channel hopping schemes. Our schemes outperform in terms of the four metrics: maximum time to rendezvous, channel loading, degree of rendezvous, and maximum conditional time to rendezvous.