The major challenge encountered by battery-driven wireless local area networking devices is to conserve their energy for prolonged operation. This paper presents an energy-efficient medium access mechanism called group control slot allocation (GCSA) protocol for cognitive radio (CR) networks. GCSA utilizes the group priority allocation algorithm to allocate stations (STAs) into groups; subsequently STAs that have traffic buffered in an access point are assigned to a higher priority group. A management frame, namely group monitoring pointer, optimizes the sleep-awake cycle of the STAs by allocating transmission opportunities to groups based on their priority. GCSA employs publisher-subscriber and point-to-point messaging models for communication between the base station and STAs, respectively. Performance analysis of GCSA demonstrates that increasing the number of STAs which enter into sleep mode augments the percentage of energy saved. The overall system-level results show that energy saved is around 20% higher for GCSA than the IEEE 802.11e standard hybrid coordination function power-saving mode. Since GCSA benefits from history-assisted-led spectrum sensing, the paper also presents the relationship of the local storage of CRs with respect to history and suggests a hybrid approach as best option to keep a balance between the sensed data and its sharing with analytical engine database for history enrichment leading toward improved energy efficiency.

中文翻译：

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用于基于基础架构的认知无线电网络的高能效GCSA媒体访问协议

电池驱动的无线局域网设备面临的主要挑战是保存其能量以延长操作时间。本文提出了一种用于认知无线电（CR）网络的称为组控制时隙分配（GCSA）协议的节能媒体访问机制。GCSA利用组优先级分配算法将工作站（STA）分配到组中；随后，将在访问点缓存了流量的STA分配给更高优先级的组。管理帧（即组监视指针）通过根据组的优先级为组分配传输机会来优化STA的睡眠唤醒周期。GCSA使用发布者-订户和点对点消息传递模型分别在基站和STA之间进行通信。GCSA的性能分析表明，增加进入睡眠模式的STA的数量可以增加节省的能量的百分比。总体系统级别的结果表明，GCSA的节能量比IEEE 802.11e标准混合协调功能的节能模式高出20％。由于GCSA得益于历史辅助的频谱感应，因此本文还介绍了CR的本地存储与历史的关系，并提出了一种混合方法，这是在感知数据及其与分析引擎共享之间保持平衡的最佳选择。历史记录数据库，可提高能源效率。总体系统级别的结果表明，GCSA的节能量比IEEE 802.11e标准混合协调功能的节能模式高出20％。由于GCSA得益于历史辅助的频谱感应，因此本文还介绍了CR的本地存储与历史的关系，并提出了一种混合方法，这是在感知数据及其与分析引擎共享之间保持平衡的最佳选择。历史记录数据库，可提高能源效率。总体系统级别的结果表明，GCSA的节能量比IEEE 802.11e标准混合协调功能的节能模式高出20％。由于GCSA得益于历史辅助的频谱感应，因此本文还介绍了CR的本地存储与历史的关系，并提出了一种混合方法，这是在感知数据及其与分析引擎共享之间保持平衡的最佳选择。历史记录数据库，可提高能源效率。