Traffic-prediction-assisted dynamic power saving mechanism for IEEE 802.16e wireless MANs  

作　　者：陆绍飞 王建新 荣辉桂 秦拯 

机构地区：[1]School of Information Science and Engineering,Hunan University [2]School of Information Science and Engineering,Central South University

出　　处：《Journal of Central South University》2013年第6期1552-1558,共7页中南大学学报（英文版）

基　　金：Projects(60873265,61070194)supported by the National Natural Science Foundation of China;Project(2009AA112205)supported by the National High Technology Research and Development Program of China;Project(2011FJ2003)supported by Science and Technology Key Projects of Hunan Province,China;Project(531107040201)supported by Chinese Universities Scientific Fund

摘　　要：How to reduce the energy consumption powered mainly by battery to prolong the standby time is one of the crucial issues for IEEE 802.16e wireless MANs.By predicting the next downlink inter-packet arrival time,three traffic-prediction-assisted power saving mechanisms based on P-PSCI,i.e.,PSCI-PFD,PSCI-ED and PSCI-LD,were proposed.In addition,the corresponding adjustment strategies for P-PSCI were also presented when there were uplink packets to be transmitted during sleep mode.Simulation results reveal that compared with the sleep mode algorithm recommended by IEEE 802.16e,the proposed mechanism P-PSCI can improve both energy efficiency and packet delay for IEEE 802.16e due to the consideration of the traffic characteristics and rate changes.Moreover,the results also demonstrate that PSCI-PFD (a=-2) significantly outperforms PSCI-ED,PSCI-LD,and the standard sleep mode in IEEE 802.16e is in terms of energy efficiency and packet delay.How to reduce the energy consumption powered mainly by battery to prolong the standby time is one of the crucial issues for IEEE 802.16e wireless MANs. By predicting the next downlink inter-packet arrival time, three traffic-prediction-assisted power saving mechanisms based on P-PSCI, i.e., PSCI-PFD, PSCI-ED and PSCI-LD, were proposed. In addition, the corresponding adjustment strategies for P-PSCI were also presented when there were uplink packets to be transmitted during sleep mode. Simulation results reveal that compared with the sleep mode algorithm recommended by IEEE 802.16e, the proposed mechanism P-PSCI can improve both energy efficiency and packet delay for IEEE 802.16e due to the consideration of the traffic characteristics and rate changes. Moreover, the results also demonstrate that PSCI-PFD （a=-2） significantly outperforms PSCI-ED, PSCI-LD, and the standard sleep mode in IEEE 802.16e is in terms of energy efficiency and packet delay.

关 键 词：sleep mode power saving traffic prediction IEEE 802.16e 

分 类 号：TN925.93[电子电信—通信与信息系统] U491.14[电子电信—信息与通信工程]