ZigBee-Assisted Power Saving for More Efficient and Sustainable Ad Hoc Networks
ZigBee-Assisted Power Saving for More Efficient and Sustainable Ad Hoc Networks
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DOI：
10.1109/tw.2013.110813.130035
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发表时间：
2013-11
影响因子：
10.4
通讯作者：
Hua Qin;Wensheng Zhang
中科院分区：
文献类型：
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作者：
Hua Qin;Wensheng Zhang
在紧急情况下，基于基础设施的无线接入网络（例如，WLAN、蜂窝网络）可能由于断电或基础设施损坏而崩溃。为了实现救援操作的响应通信，可以建立无线自组织网络。然而，由于电池容量有限，网络可能无法维持足够长的时间，特别是当要求严格的通信延迟时。针对能量效率，IEEE 802.11 DCF的节能管理（PSM）已被标准化，并可应用于多跳ad hoc网络。然而，使用PSM，当数据流量不可预测时，难以同时实现高能效和低延迟。针对低功耗ZigBee接口与WiFi接口一起嵌入到移动的设备中的趋势，提出了一种基于ZigBee的DCF系统唤醒机制（ZPSM），该机制利用ZigBee接口按需唤醒WiFi接口，在满足时延要求的同时，降低WiFi接口的能耗，延长网络生存时间。大量的仿真和基于原型的实验结果验证了ZPSM的性能优势。
In emergency situations, infrastructure-based wireless access networks (e.g., WLANs, cellular networks) may collapse due to power outage or infrastructure damages. To enable responsive communication for rescue operations, wireless ad hoc networks may be set up. However, due to limited battery capacity, the networks may not sustain long enough, especially when stringent communication delay is demanded. Aimed at energy efficiency, the Power Saving Management (PSM) for IEEE 802.11 DCF has been standardized and can be applied in multi-hop ad hoc networks. With PSM, however, it is difficult to achieve high energy efficiency and low delay simultaneously when data traffic is unpredictable. Motivated by the trend that low-power ZigBee interface will be more and more commonly embedded in mobile devices together with WiFi interface in the near future, we propose a ZigBee-assisted PSM (called ZPSM) for DCF, which leverages ZigBee interfaces to wake up WiFi interfaces on demand to reduce WiFi interfaces' energy consumption and thus prolong network lifetime, while satisfying delay requirements. The results of extensive simulation and prototype-based experiments have verified the performance advantages of ZPSM.