An improved dynamic user equipment power saving mechanism for LTE system and performance analysis  

作　　者：XU HaiBo, TIAN Hui , HUANG Bo & ZHANG Ping Key Laboratory of Universal Wireless Communications, Ministry of Education Beijing University of Posts and Telecommunications, Beijing 100876, China 

出　　处：《Science China(Information Sciences)》2010年第10期2075-2086,共12页中国科学（信息科学）（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 60971125);the National High-Tech Research & Development Program of China (Grant No. 2009AA01Z262);Major National S&T Project (Grant No. 21009ZX03003-003-01), and DoCoMo Beijing Communications Laboratories Co., Ltd.

摘　　要：In order to minimize the power consumption of user equipments （UEs）, and further to support various services and transmissions of large amount of data, the power saving mechanisms have been investigated for most remarkable wireless systems. In this paper, an improved dynamic discontinuous reception （D-DRX） scheme is presented for LTE system, which is able to adaptively adjust the inactivity timer and the sleep period of UEs＇ receivers. Moreover, theoretical analysis based on the Markov chain is provided for the D-DRX scheme. Several numerical examples quantitatively show that the D-DRX scheme can capture various packet arrival patterns and scheduling behaviors of system to make a better tradeoff between power saving and packet delay by considering the length of packet queue.In order to minimize the power consumption of user equipments （UEs）, and further to support various services and transmissions of large amount of data, the power saving mechanisms have been investigated for most remarkable wireless systems. In this paper, an improved dynamic discontinuous reception （D-DRX） scheme is presented for LTE system, which is able to adaptively adjust the inactivity timer and the sleep period of UEs＇ receivers. Moreover, theoretical analysis based on the Markov chain is provided for the D-DRX scheme. Several numerical examples quantitatively show that the D-DRX scheme can capture various packet arrival patterns and scheduling behaviors of system to make a better tradeoff between power saving and packet delay by considering the length of packet queue.

关 键 词：power saving DRX Markov chain LTE-ADVANCED 

分 类 号：TN929.5[电子电信—通信与信息系统]