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。
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.
出处
《计算机科学》
CSCD
北大核心
2015年第2期70-75,共6页
Computer Science
基金
国家自然科学基金面上项目(61370065)资助
