针对传统资源调度算法不能适应切换场景空口信号质量急速下降而导致的切换命令重传问题,提出了一种对切换场景优化的应用于B-TrunC专网的降低切换命令误码率的新型传输方案。该方案在PDCP(Packet Data Convergence Protoco1)模块自动识...针对传统资源调度算法不能适应切换场景空口信号质量急速下降而导致的切换命令重传问题,提出了一种对切换场景优化的应用于B-TrunC专网的降低切换命令误码率的新型传输方案。该方案在PDCP(Packet Data Convergence Protoco1)模块自动识别下发给终端的切换命令,通过设计区别于普通信令和数据传输的调度机制,采用指定的低阶调制方式和编码速率传输切换命令,降低切换命令传输误码率。切换场景下的仿真结果表明,所提出的方案可有效降低切换命令的重传和失败概率,显著提升B-TrunC专网系统的切换时延性能。展开更多
Wepresnet a brief introduction of applying the idea of mortar method to locally nonconforming TRUNC element for solving plate bending problem. At the interfaces, three mortar conditions, one for the value of solution ...Wepresnet a brief introduction of applying the idea of mortar method to locally nonconforming TRUNC element for solving plate bending problem. At the interfaces, three mortar conditions, one for the value of solution in pointwise way, the other two for the normal and tangential derivatives of the solution in projection way, are provided to secure the global convergence. Afte some detailed analysis, we obtain that its error estimates in both energy norm and discrete H1 norm are optimal for u*∈H3(Ω)∩H2 0(Ω).展开更多
This paper provides a simplified derivation for error estimates of the TRUNC plate element. The error analysis for the problem with mixed boundary conditions is also discussed.
Wireless communication technologies play an essential role in supporting railway operation and control. The current Global System for Mobile Communications-Railway(GSM-R) system offers a rich set of voice services and...Wireless communication technologies play an essential role in supporting railway operation and control. The current Global System for Mobile Communications-Railway(GSM-R) system offers a rich set of voice services and data services related with train control, but it has very limited multimedia service bearer capability. With the development of commercial wireless industry, Long-Term Evolution(LTE) mobile broadband technology is becoming the prevalent technology in most of commercial mobile networks. LTE is also a promising technology of future railway mobile communication systems. The 3rd Generation Partner Project(3 GPP) and China Communications Standards Association(CCSA) have proposed two feasible LTE based broadband trunking communication solutions: the 3 GPP Mission Critical Push to Talk(MCPTT) solution and B-TrunC solution. In this paper, we first introduce the development of railway mobile communications and LTE technology. The user requirements of future railway mobile communication system(FRMCS) are then discussed. We also analyze the suitability of the two LTE-based solutions for LTE based Next-Generation Railway Mobile Communication System(LTE-R) from different aspects.展开更多
设计一种宽带集群(Broardband Trunking Communication,B-TrunC)系统中乘客信息系统(Passenger Information System,PIS)数据传输方法,介绍了PIS业务数据传输系统的整体架构,结合PIS业务特点分析了方案设计的基本原理,详细描述了PIS数...设计一种宽带集群(Broardband Trunking Communication,B-TrunC)系统中乘客信息系统(Passenger Information System,PIS)数据传输方法,介绍了PIS业务数据传输系统的整体架构,结合PIS业务特点分析了方案设计的基本原理,详细描述了PIS数据传输方案的信令流程和数据传输路径,通过模拟实际项目的应用场景验证了设计的可行性。展开更多
文摘针对传统资源调度算法不能适应切换场景空口信号质量急速下降而导致的切换命令重传问题,提出了一种对切换场景优化的应用于B-TrunC专网的降低切换命令误码率的新型传输方案。该方案在PDCP(Packet Data Convergence Protoco1)模块自动识别下发给终端的切换命令,通过设计区别于普通信令和数据传输的调度机制,采用指定的低阶调制方式和编码速率传输切换命令,降低切换命令传输误码率。切换场景下的仿真结果表明,所提出的方案可有效降低切换命令的重传和失败概率,显著提升B-TrunC专网系统的切换时延性能。
文摘Wepresnet a brief introduction of applying the idea of mortar method to locally nonconforming TRUNC element for solving plate bending problem. At the interfaces, three mortar conditions, one for the value of solution in pointwise way, the other two for the normal and tangential derivatives of the solution in projection way, are provided to secure the global convergence. Afte some detailed analysis, we obtain that its error estimates in both energy norm and discrete H1 norm are optimal for u*∈H3(Ω)∩H2 0(Ω).
基金The work was partly supported by NNSFC under the grant no. 10371076, E-Institutes of Shanghai Municipal Education Commission, N. E03004 and The Science Foundation of Shanghai under the grant no. 04JC14062. The second author is also engaged with Division of Computational Science, E-Institute of Shanghai Universities, Shanghai Normal University, China.
文摘This paper provides a simplified derivation for error estimates of the TRUNC plate element. The error analysis for the problem with mixed boundary conditions is also discussed.
基金partly supported by ZTE Industry-Academia-Research Cooperation FundsFundamental Research Funds for the Central Universities(No.2016JBM076)+1 种基金the National Natural Science Foundation of China(No.61501023,No.U1334202,and No.U1534201)the Project of China Railway Corporation(No.2016X009-E)
文摘Wireless communication technologies play an essential role in supporting railway operation and control. The current Global System for Mobile Communications-Railway(GSM-R) system offers a rich set of voice services and data services related with train control, but it has very limited multimedia service bearer capability. With the development of commercial wireless industry, Long-Term Evolution(LTE) mobile broadband technology is becoming the prevalent technology in most of commercial mobile networks. LTE is also a promising technology of future railway mobile communication systems. The 3rd Generation Partner Project(3 GPP) and China Communications Standards Association(CCSA) have proposed two feasible LTE based broadband trunking communication solutions: the 3 GPP Mission Critical Push to Talk(MCPTT) solution and B-TrunC solution. In this paper, we first introduce the development of railway mobile communications and LTE technology. The user requirements of future railway mobile communication system(FRMCS) are then discussed. We also analyze the suitability of the two LTE-based solutions for LTE based Next-Generation Railway Mobile Communication System(LTE-R) from different aspects.
文摘设计一种宽带集群(Broardband Trunking Communication,B-TrunC)系统中乘客信息系统(Passenger Information System,PIS)数据传输方法,介绍了PIS业务数据传输系统的整体架构,结合PIS业务特点分析了方案设计的基本原理,详细描述了PIS数据传输方案的信令流程和数据传输路径,通过模拟实际项目的应用场景验证了设计的可行性。
