The energy efficiency and packet delay tradeoffs in long term evolution-advanced(LTE-A) systems are investigated.Analytical expressions are derived to explain the relation of energy efficiency to mean packet delay,arr...The energy efficiency and packet delay tradeoffs in long term evolution-advanced(LTE-A) systems are investigated.Analytical expressions are derived to explain the relation of energy efficiency to mean packet delay,arrival rate and component carrier(CC) configurations,from the theoretical respective which reveals that the energy efficiency of multiple CC systems is closely related to the frequency of CCs and the number of active CCs.Based on the theoretical analysis,a CC adjusting scheme for LTE-A systems is proposed to maximize energy efficiency subject to delay constraint by dynamically altering the on/off state of CCs according to traffic variations.Numerical and simulation results show that for CCs in different frequency bands with equal transmit power,the proposed scheme could significantly improve the energy efficiency of users in all aggregation levels within the constraint of mean packet delay.展开更多
本文集为下一代因特网专辑。收录的14篇论文主要涉及:基于 IP 分组延迟时间测定的通路特性的评价方法,IP 网络的性能测定技术,IP 分组损失对MPEG1语言与图象质量的影响评价,下一代计算机网络中的网络性能设计方法,网络业务量的分析,多...本文集为下一代因特网专辑。收录的14篇论文主要涉及:基于 IP 分组延迟时间测定的通路特性的评价方法,IP 网络的性能测定技术,IP 分组损失对MPEG1语言与图象质量的影响评价,下一代计算机网络中的网络性能设计方法,网络业务量的分析,多点环境的有效利用,计算机网络高速化的动态与展望,作为因特网中信息系统的电子图书馆,WAN 设计性能诊断中的业务量计量结果,保证通信质量的通信系统,反馈式业务量控制,以及高速计算机通信等。展开更多
基金Supported by the National High Technology Research and Development Program of China(No.2011AA01A109)the National Natural Science Foundation of China(No.61002017,61072076.)the Department of Science and Technology Commission of Shanghai Base Project(No.11DZ2290100)
文摘The energy efficiency and packet delay tradeoffs in long term evolution-advanced(LTE-A) systems are investigated.Analytical expressions are derived to explain the relation of energy efficiency to mean packet delay,arrival rate and component carrier(CC) configurations,from the theoretical respective which reveals that the energy efficiency of multiple CC systems is closely related to the frequency of CCs and the number of active CCs.Based on the theoretical analysis,a CC adjusting scheme for LTE-A systems is proposed to maximize energy efficiency subject to delay constraint by dynamically altering the on/off state of CCs according to traffic variations.Numerical and simulation results show that for CCs in different frequency bands with equal transmit power,the proposed scheme could significantly improve the energy efficiency of users in all aggregation levels within the constraint of mean packet delay.
