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LTE-A飞蜂窝网络自相似业务流的端到端时延边界分析
引用本文:司远,陈昕,刘宗奇. LTE-A飞蜂窝网络自相似业务流的端到端时延边界分析[J]. 计算机科学, 2015, 42(2): 70-75
作者姓名:司远  陈昕  刘宗奇
作者单位:北京信息科技大学计算机学院网络文化与数字传播北京市重点实验室 北京100101
基金项目:本文受国家自然科学基金面上项目(61370065)资助
摘    要:LTE-A是一种4G移动通信标准,可满足移动数据业务对传输带宽的要求。为解决移动通信网络中室内信号质量较差的问题,LTE-A标准采用飞蜂窝技术作为室内无线接入解决方案。针对LTE-A飞蜂窝网络的时延边界问题,运用随机网络演算方法分析业务流的自相似性质和MIMO信道的时变特性,构建了LTE-A飞蜂窝网络中自相似业务流的随机到达与随机服务模型。围绕所构建的到达与服务模型,运用有效带宽理论和chernoff界方法,给出了自相似业务流的端到端时延边界。NS3仿真验证表明,在信道带宽和业务流优先级等指标不同的情形下,所给出的理论端到端时延边界与仿真时延的偏差在2ms以内,较为准确有效,可为确保LTE-A飞蜂窝网络的服务质量提供依据。

关 键 词:LTE-A飞蜂窝  随机网络演算  自相似流  时延边界
收稿时间:2014-03-13
修稿时间:2014-07-21

Bounding End to End Delay for Self-similar Traffic in LTE-A Femtocell Networks
SI Yuan,CHEN Xin and LIU Zong-qi. Bounding End to End Delay for Self-similar Traffic in LTE-A Femtocell Networks[J]. Computer Science, 2015, 42(2): 70-75
Authors:SI Yuan  CHEN Xin  LIU Zong-qi
Affiliation:Beijing Key Laboratory of Internet Culture and Digital Dissemination Research,Computer School, Beijing Information Science and Technology University,Beijing 100101,China,Beijing Key Laboratory of Internet Culture and Digital Dissemination Research,Computer School, Beijing Information Science and Technology University,Beijing 100101,China and Beijing Key Laboratory of Internet Culture and Digital Dissemination Research,Computer School, Beijing Information Science and Technology University,Beijing 100101,China
Abstract:LTE-A is a fourth-generation radio communication standard which provides high data rates to mobile users.LTE-A adopts femtocell technology to enhance the quality of service (QoS) experienced by indoor users.To derive the end-to-end delay bound of LTE-A femtocell networks,a stochastic network calculus method was proposed.First,stochastic traffic and service curves are constructed to model respectively the self-similar mobile traffic and MIMO channels in LTE-A femtocell networks.Then,effective bandwidth and Chernoff bound approaches are employed to obtain the theoretical end-to-end delay bound.Simulations by NS3 show that the deviation between the theoretical and simulative upper bounds on delay is within 2 milliseconds.This paper provided some fresh insight into QoS provisioning in LTE-A femtocell networks.
Keywords:LTE-A femtocell  Stochastic network calculus  Self-similar traffic  Delay bound
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