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Hopping-Based Channel Access in Cognitive Radio Systems

机译:基于跳跃的认知无线电系统的频道访问

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In multi-channel multi-user cognitive radio systems, there are two main challenges to support traffic with delaysensitive QoS requirements, namely, the coordination among the secondary users (SUs) and the long channel occupancy time of the primary users (PUs). In this paper, we propose a hopping-based channel access scheme for SUs to improve their performance. Each SU chooses one of the channels allocated to PUs in a hopping-based manner in each time slot to opportunistically sense and transmit. This scheme not only avoids collisions among SUs, but also reduces the effect of the long channel occupancy time of PUs on the QoS performance of the SUs' delay-sensitive applications. We analyze the effective capacity of SU's service process with our proposed scheme. Numerical results show that our proposed scheme can achieve a higher effective capacity compared to random or fixed channel allocation.
机译:在多通道多用户认知无线电系统中,有两个主要挑战来支持带有延迟QoS要求的流量,即二级用户(SUS)之间的协调和主要用户(PU)的长通道占用时间。在本文中,我们提出了一种基于跳跃的渠道访问方案,以提高其性能。每个SU在每个时隙中选择以跳跃的方式分配给PU的一个通道,以机会地学习和传输。该方案不仅避免了SUS之间的碰撞,而且还降低了PU对SUS延迟敏感应用的QoS性能的长通道占用时间对SUS的QoS性能的影响。我们通过拟议计划分析SU的服务流程的有效能力。数值结果表明,与随机或固定信道分配相比,我们所提出的方案可以实现更高的有效能力。

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