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首页> 外文会议>Information Sciences and Systems, 2009. CISS 2009 >Secondary user friendly TDMA scheduling for primary users in cognitive radio networks
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Secondary user friendly TDMA scheduling for primary users in cognitive radio networks

机译：认知无线电网络中主要用户的次要用户友好的TDMA调度

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摘要

Cognitive radio technology is widely accepted as an efficient approach to solve the problem that the wireless spectrum has been getting scarcer and scarcer due to the rapid growth in the ubiquitous wireless applications. Several cognitive medium access control (MAC) protocols have been proposed for the secondary users (non-licensed users) to take advantage of the vacant channels whenever they are not occupied by the primary users (licensed users) in the wireless time division multiple access (TDMA)-based networks. In this paper, by exploiting the unique property of the wireless fading channel and cross-layer design technique, we develop a packets scheduling scheme for the primary users in the context of wireless TDMA networks, which is set up to operate friendly towards the secondary users in terms of vacant-channel probability. Our proposed scheme can be implemented with just slight modification on the traditional TDMA scheduling algorithm. We develop a rigorous queuing model and then quantitatively analyze the tradeoff among multiple performance metrics to identify when and where the cost for favoring the secondary users is worthy. The analytical results show that our proposed scheme can generate more vacant-channel opportunities for secondary users, at the expense of little increasing packet delay, as compared with the traditional wireless TDMA scheduling algorithm. In addition, since the implementation of our proposed scheme only needs little modification on the existing TDMA scheduling algorithm, our proposed scheme is a practical and cost-effective approach to increase the wireless spectrum utilization.
机译：认知无线电技术已被广泛认为是解决由于无处不在的无线应用的快速增长而使无线频谱变得越来越稀缺的一种有效方法。已经提出了几种认知媒体访问控制（MAC）协议，供次要用户（非许可用户）在无线时分多址访问中只要主用户（许可用户）未占用空闲信道就可以利用空闲信道基于TDMA的网络。在本文中，通过利用无线衰落信道的独特特性和跨层设计技术，我们在无线TDMA网络的背景下为主要用户开发了一种分组调度方案，该方案被设置为对次要用户友好根据空闲渠道的可能性。我们提出的方案可以在传统的TDMA调度算法上稍加修改即可实现。我们建立了严格的排队模型，然后定量分析了多个性能指标之间的折衷，以确定何时和何地值得二级用户使用的成本是值得的。分析结果表明，与传统的无线TDMA调度算法相比，我们提出的方案可以为次要用户提供更多的空闲信道机会，而只增加了很少的分组延迟。另外，由于我们提出的方案的实现只需要对现有的TDMA调度算法进行很少的修改，因此我们提出的方案是增加无线频谱利用率的实用且成本有效的方法。

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