业务感知的自适应协作频谱感知算法

邱恭安; 章国安

doi:10.11999/JEIT160582

业务感知的自适应协作频谱感知算法

doi: 10.11999/JEIT160582

邱恭安¹,
章国安¹

基金项目:

国家自然科学基金(61371113, 61601248)

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- 被引次数: 0
出版历程
- 收稿日期: 2016-06-03
- 修回日期: 2016-11-22
- 刊出日期: 2017-04-19

Service Awareness Based Adaptive Cooperative Spectrum Sensing Algorithm

QIU Gongan¹,
ZHANG Guoan¹

Funds:

The National Natural Science Foundation of China (61371113, 61601248)

摘要

摘要: 为提高次用户接入业务端到端传输性能，该文提出通过感知节点检测性能和业务类型的频谱检测与资源分配联合优化方法。首先，将上周期全局检测性能构造的有效检测指数作为调节权值，计算信道状态自适应协作门限，据此选择协作模式，以最大化有效检测区间，并根据频带稳定性和有效性特征构造可用频谱空间。随后，基于业务请求接入速率将接入业务分为时延敏感业务和可靠性敏感业务两类，通过业务属性匹配的频谱分配算法提高接入业务的端到端传输成功率。仿真显示，在不同信道状态下，所提算法通过自适应调整全局检测性能扩大了Rayleigh衰落信道的有效频谱检测区间，降低了时延敏感业务的中断概率。
- 频谱检测 /
- 频谱分配 /
- 自适应协作 /
- 业务感知
Abstract: Joint optimization of cooperative spectrum detection and resource allocation based on the service profile is investigated to enhance end-to-end transmission performance of the secondary users by selecting the sensing nodes. At first, the adaptive cooperation thresholds are adjusted according to the weight of available detection index based on the global detection metrics in the last round. And the optimal cooperative mode can be selected to maximize the available sensing region. The idle channels are managed depend on the stability and the available bandwidth metrics for different secondary users. Then, the secondary users can be divided into two categories based on the requested rates, delay sensitive services and reliability sensitive services. The idle channels for the secondary users with different quality of service demands are selected depend on the service profile for enhancing end-to-end transmission performance. Simulation results show that the proposed algorithm can expand the available sensing region through adjusting the global detection metrics adaptively in Rayleigh fading channel and increase the resource utility by decreasing the outage of delay sensitive services.
- Spectrum detection /
- Spectrum allocation /
- Adaptive cooperation /
- Service awareness

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参考文献(20)

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