In order to achieve dynamical optimization of mobility load balancing,we analyze the conflict between mobility load balancing and mobility robustness optimization caused by the improper operation of handover parameter...In order to achieve dynamical optimization of mobility load balancing,we analyze the conflict between mobility load balancing and mobility robustness optimization caused by the improper operation of handover parameters.To this end,a method of Handover Parameters Adjustment for Conflict Avoidance(HPACA)is proposed.Considering the movement of users,HPCAC can dynamically adjust handover range to optimize the mobility load balancing.The movement of users is an important factor of handover,which has a dramatic impact on system performance.The numerical evaluation results show the proposed approach outperforms the existing method in terms of throughput,call blocking ratio,load balancing index,radio link failure ratio,ping-pong handover ratio and call dropping ratio.展开更多
移动终端通过小区搜索完成与网络的接入工作。为了更快地完成时分长期演进(time division long term evolution,TD-LTE)系统小区搜索过程,与传统数字信号处理(digital signal processing,DSP)串行模式对比,从速度和面积两方面综合考虑,...移动终端通过小区搜索完成与网络的接入工作。为了更快地完成时分长期演进(time division long term evolution,TD-LTE)系统小区搜索过程,与传统数字信号处理(digital signal processing,DSP)串行模式对比,从速度和面积两方面综合考虑,提出一种基于现场可编程门阵列(field programmable gate array,FPGA)的多通道并行小区搜索架构。主要工作集中在小区搜索整体方案设计和FPGA硬件实现上,在算法上对整个小区搜索算法架构进行了改进,同时根据硬件需求,利用以时钟换取速度的思想对FPGA硬件实现架构进行了优化。采用多通道并行高速乘法器进行序列相关检测和动态门限配置的方法,大大缩短了TD-LTE小区搜索的处理时间。并以Altera的EP4SGX230KF40C2芯片作为硬件平台进行了Modelsim功能仿真、板级验证等工作。实验结果表明,该设计方案的处理速度和数据精度均满足TD-LTE系统测试要求,性能远优于传统的DSP架构模式,可以应用到实际工程中。展开更多
为适应TD-LTE(Time Division Long Term Evolution)业务的承载需求,对移动城域传送网现状、TD-LTE主要技术特点及其承载需求、面向TD-LTE移动城域传送网的技术选择进行了分析。指出面向TD-LTE移动城域传送网应全程采用PTN(Packet Transp...为适应TD-LTE(Time Division Long Term Evolution)业务的承载需求,对移动城域传送网现状、TD-LTE主要技术特点及其承载需求、面向TD-LTE移动城域传送网的技术选择进行了分析。指出面向TD-LTE移动城域传送网应全程采用PTN(Packet Transport Network)技术组网,以PTN核心层支持L3-VPN(Layer3-Virtual PrivateNetwork)方案作为其具体组网模式,在核心、汇聚层引入OTN(Optical Transport Network)技术,以OTN+PTN方式组建城域传送网。结合当前移动城域传送网现状,提出面向TD-LTE的移动城域传送网的网络结构。给出了面向未来移动城域传送网接入、汇聚和核心层的建设思路,以期指导中国移动城域传送网建设。展开更多
基金supported by the National Natural Science Foundation of China under Grant No.61071118the National Basic Research Program of China(973 Program)under Grant No.2012CB316004+1 种基金Special Fund of Chongqing Key Laboratory(CSTC)Chongqing Municipal Education Commission’s Science and Technology Research Project under Grant No.KJ111506
文摘In order to achieve dynamical optimization of mobility load balancing,we analyze the conflict between mobility load balancing and mobility robustness optimization caused by the improper operation of handover parameters.To this end,a method of Handover Parameters Adjustment for Conflict Avoidance(HPACA)is proposed.Considering the movement of users,HPCAC can dynamically adjust handover range to optimize the mobility load balancing.The movement of users is an important factor of handover,which has a dramatic impact on system performance.The numerical evaluation results show the proposed approach outperforms the existing method in terms of throughput,call blocking ratio,load balancing index,radio link failure ratio,ping-pong handover ratio and call dropping ratio.
文摘移动终端通过小区搜索完成与网络的接入工作。为了更快地完成时分长期演进(time division long term evolution,TD-LTE)系统小区搜索过程,与传统数字信号处理(digital signal processing,DSP)串行模式对比,从速度和面积两方面综合考虑,提出一种基于现场可编程门阵列(field programmable gate array,FPGA)的多通道并行小区搜索架构。主要工作集中在小区搜索整体方案设计和FPGA硬件实现上,在算法上对整个小区搜索算法架构进行了改进,同时根据硬件需求,利用以时钟换取速度的思想对FPGA硬件实现架构进行了优化。采用多通道并行高速乘法器进行序列相关检测和动态门限配置的方法,大大缩短了TD-LTE小区搜索的处理时间。并以Altera的EP4SGX230KF40C2芯片作为硬件平台进行了Modelsim功能仿真、板级验证等工作。实验结果表明,该设计方案的处理速度和数据精度均满足TD-LTE系统测试要求,性能远优于传统的DSP架构模式,可以应用到实际工程中。
文摘为适应TD-LTE(Time Division Long Term Evolution)业务的承载需求,对移动城域传送网现状、TD-LTE主要技术特点及其承载需求、面向TD-LTE移动城域传送网的技术选择进行了分析。指出面向TD-LTE移动城域传送网应全程采用PTN(Packet Transport Network)技术组网,以PTN核心层支持L3-VPN(Layer3-Virtual PrivateNetwork)方案作为其具体组网模式,在核心、汇聚层引入OTN(Optical Transport Network)技术,以OTN+PTN方式组建城域传送网。结合当前移动城域传送网现状,提出面向TD-LTE的移动城域传送网的网络结构。给出了面向未来移动城域传送网接入、汇聚和核心层的建设思路,以期指导中国移动城域传送网建设。
