无线异构网络中终端的能耗分析模型  

A Model for Terminal Energy Consumption Analysis in Wireless Heterogeneous Networks

作　　者：江俊锋[1] 曹志刚[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《北京邮电大学学报》2007年第4期78-82,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60472027)

摘　　要：为了对无线异构网络中多模终端的能耗分析问题进行研究,通过考察终端的工作机理,利用半马尔科夫链描述终端的通信状态,从而得到终端的能耗分析方程.相比已有的工作,提出的模型更全面地考虑了终端的工作状态,还考虑了终端发现wireless local area network(WLAN)的概率和业务类别等因素的影响.分析结果表明,终端能耗随呼叫到达强度和呼叫持续时间增大而增大;终端能耗与话音业务的比例和发现WLAN的概率均成近似线性关系;使WLAN模块进入低能耗的等待状态并不会节省终端能耗.To study the terminal energy consumption in wireless heterogeneous networks, a semi- Markov chain to reflect the communication states and deduct an analytical energy consumption evaluation model is adopted through the investigation of a terminal＇s operation modes. Comparing with the previous works, the proposed model will incorporate all the communication states of a terminal; the probability of successful wireless local area network （WLAN） discovery; and service type. Analysis results show that the energy consumption will increase as the call arrival rate and call holding time increase. Moreover, it is found that the energy consumption is approximately linear with respect to the voice call ratio and the probability of successful WLAN discovery. It is also found that making WLAN module in low energy consumption waiting state does not save terminal energy.

关 键 词：无线数据通信 无线异构网络 能耗分析 半马尔科夫链 

分 类 号：TN919.72[电子电信—通信与信息系统]