Multiple radios for effective rendezvous in cognitive radio networks

Multiple radios for effective rendezvous in cognitive radio networks
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用于认知无线电网络中有效交会的多个无线电

DOI:
10.1109/icc.2013.6654974
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发表时间:
2013-06
影响因子:
7.9
通讯作者:
Zhiyong Lin
Zhiyong Lin
中科院分区:
计算机科学2区
文献类型:
--
作者:
Hai Liu;Yiu-Wing Leung;Xiaowen Chu;Zhiyong Lin

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重定向是认知无线电网络(CRN)中的一项基本操作,用于在认知用户之间的公共可用信道上建立通信链路。现有的关于会合的工作隐含地假设每个认知用户配备有一个无线电(即,一个无线收发器)。随着无线收发器成本的下降,可以利用这一特性以低成本显著提高交会性能。在这项研究中,我们研究的会合问题,认知用户配备了多个无线电和不同的用户可能有不同数量的无线电。我们首先研究如何现有的交会算法可以推广到使用多个无线电更快的交会。然后,我们提出了一种新的会合算法,称为基于角色的并行序列(RPS),专门利用多个无线电更有效的会合。我们的基本思想是让认知用户停留在一个特定的信道在一个专用的无线电和跳跃的可用信道上的并行序列在其余的通用无线电。我们证明,我们的算法提供了保证交会,并推导出最大的时间交会(TTR)和上界的预期TTR。进行了大量的实验,以评估所提出的解决方案。
Rendezvous is a fundamental operation in cognitive radio networks (CRNs) for establishing a communication link on a commonly-available channel between cognitive users. The existing works on rendezvous implicitly assume that each cognitive user is equipped with one radio (i.e., one wireless transceiver). As the cost of wireless transceivers is dropping, this feature can be exploited to significantly improve the rendezvous performance at low cost. In this study, we investigate the rendezvous problem in CRNs where cognitive users are equipped with multiple radios and different users may have different number of radios. We first study how the existing rendezvous algorithms can be generalized to use multiple radios for faster rendezvous. We then propose a new rendezvous algorithm, called role-based parallel sequence (RPS), which specifically exploits multiple radios for more efficient rendezvous. Our basic idea is to let the cognitive users stay in a specific channel in one dedicated radio and hop on the available channels with parallel sequences in the remaining general radios. We prove that our algorithm provides guaranteed rendezvous and derive the maximum time-to-rendezvous (TTR) and upper-bounds on the expected TTR. Extensive experiments are conducted to evaluate the proposed solutions.
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