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首页> 外文期刊>International Journal of Space-Based and Situated Computing >On the target channel sequence selection for multiple handoffs in cognitive radio-based wireless regional area networks
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On the target channel sequence selection for multiple handoffs in cognitive radio-based wireless regional area networks

机译：在基于认知无线电基无线区域网络中的多重切换的目标信道序列选择

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摘要

In cognitive radio networks, handoff occurs when an unlicensed spectrum user has to switch to a new target channel from its current operating channel which a secondary user was using opportunistically. This situation raises whenever either the licensed primary user appears again or the channel's condition get worst. Substantial sensing time can be saved if a secondary user can make a proactive decision about selecting the future vacant target channel to resume the unfinished transmission before starting its transmission. This paper proposes a novel target channel sequence selection scheme for cognitive radio networks, which minimises the estimated service time of a secondary user by reducing the multiple handoffs. A non-iterative algorithm is implemented, which does not require the use of an exhaustive search technique as usual to determine the target channel sequence. Simulation results show that the proposed scheme outperforms both the random scheme and a considered benchmark scheme in terms of service time, cumulative handoff delay and throughput achieved by the secondary user.
机译：在认知无线电网络中，当未许可的频谱用户必须从其当前操作信道切换到新的目标信道时，发生切换，辅助用户机会使用的。无论何种许可主用户再次出现或通道的条件都会变坏，此情况会提高。如果辅助用户可以在选择未来空置目标信道的主动决定，则可以保存大量感测时间，然后在开始其传输之前恢复未完成的传输。本文提出了一种用于认知无线电网络的新型目标信道序列选择方案，其通过减少多次切换来最小化辅助用户的估计服务时间。实现了非迭代算法，其不需要像往常一样使用详尽的搜索技术来确定目标信道序列。仿真结果表明，在辅助用户的服务时间，累积切换延迟和吞吐量方面，所提出的方案优于随机方案和考虑的基准方案。

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