基于小区DTX技术的LTE系统节能机制  

An energy-saving method for LTE system based on cell DTX technique

作　　者：申玲钰[1] 楼培德[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《电信工程技术与标准化》2012年第9期67-72,共6页Telecom Engineering Technics and Standardization

摘　　要：本文研究了一种基于小区非连续发送(DTX)技术的LTE系统节能机制。在满足小区容量需求及控制信息有效传输的前提下,小区在空闲下行OFDM符号中执行休眠机制,同时关闭相应的功率放大器(PA)。本文还建立了一种最优化模型,依据负载需求求解一个系统帧中可执行休眠机制的下行子帧数,该模型优化对象为PA的能量消耗,比仅考虑信道中传输能量的方法[1]更有效。该方法在小区无负载或低负载时,可有效降低PA能量消耗。以单用户系统为例,小区DTX技术最大可节省约60%的PA能量消耗。In this paper, an energy-saving method based on cell discontinuous transmission （DTX） technique for LYE system is presented. By using cell DTX, the cell can be put into sleep mode and the power amplifier （PA） can be turned off in certain OFMD symbols, which do not carry any user information or control signals. An optimization model is proposed, to get the number of sub-frames that can enter sleep mode in a system frame, according to the traffic load. The optimized object of the model is PA energy consumption, which is more effective than only taking the channel transmission energy into consideration. It is showed that, significant energy reductions can be achieved by using cell DTX technique, when the traffic load is low. Taking a single user system as example, up to 60% energy reduction of PA energy consumption can be achieved.

关 键 词：小区DTX 功率放大器 节能 负载 LTE 

分 类 号：TN929.5[电子电信—通信与信息系统]