A flexible and extendible control mechanism for invoking services is required for taking full advantage of the potential B--ISDN services. In this paper, a flexible specification of signaling protocol based on an obje...A flexible and extendible control mechanism for invoking services is required for taking full advantage of the potential B--ISDN services. In this paper, a flexible specification of signaling protocol based on an object-oriented call mode is proposed. The article’focuses on the protocol’s message syntax, message flow model, and applicability for defining multimedia and multiparty services.’展开更多
The new type of embedded signal processing system based on the packet switched network is achieved. According to the application field and the-characteristics of signal processing system, the RapidIO protocol is used ...The new type of embedded signal processing system based on the packet switched network is achieved. According to the application field and the-characteristics of signal processing system, the RapidIO protocol is used to solve the high-speed interconnection of multi-digital signal processor （DSP）. Based on this protocol, a kind of crossbar switch module which is used to interconnect multi-DSP in the system is introduced. A route strategy, some flow control rules and error control rules, which adapt to different RapidIO network topology are also introduced. Crossbar switch performance is analyzed in detail by the probability module. By researching the technique of crossbar switch and analyzing the system performance, it has a significant meaning for building the general signal processing system.展开更多
The future generation networks or 4G networks constitute of varied technologies converged over the Internet protocol version 6(IPv6) core. The 4G networks offer varied services over different interfaces to the user no...The future generation networks or 4G networks constitute of varied technologies converged over the Internet protocol version 6(IPv6) core. The 4G networks offer varied services over different interfaces to the user nodes. Mobility management in 4G networks is an issue that exists. The handover protocols for mobility management in 4G networks that currently exist, do not consider wireless signal degradation during handover operations. This paper introduces the Noise Resilient Reduced Registration Time Care of Mobile IP(NR RRTC:MIP) protocol for handover management. A handover decision algorithm based on the signal strength measured by the user nodes is considered in the NR RRTC: MIP protocol. A simulation study is discussed in the paper to evaluate the performance of the NR RRTC: MIP protocol. The results obtained from the simulation study prove that the NR RRTC: MIP protocol effectively reduces handover latencies and improves network performance.展开更多
网际互连协议(Internet Protocol,IP)传输技术正逐步取代传统数字分量串行接口(Serial Digital Interface,SDI)结构,推动演播室信号调度系统迈向网络化、模块化与智能化。围绕电视演播室核心业务流程,设计基于IP传输的信号调度系统,构...网际互连协议(Internet Protocol,IP)传输技术正逐步取代传统数字分量串行接口(Serial Digital Interface,SDI)结构,推动演播室信号调度系统迈向网络化、模块化与智能化。围绕电视演播室核心业务流程,设计基于IP传输的信号调度系统,构建接入适配、拓扑规划、路由部署及冗余监控4个技术模块,明确各环节在全链路调度中的功能分工与技术路径。结合实际演播项目,验证量化IP传输技术在工程实践中的技术成效,结果表明IP信号调度体系具有优越的集成能力和高效的运行效率。展开更多
多路语音交换设备实现多个用户之间的语音通信,是现代办公常用的通信管理手段,包括数字信号处理(Digital Signal Processor,DSP)、用户线接口电路(Subscriber Line Interface Circuit,SLIC)等。重点论述DSP和SLIC的国产化,通过对比进口...多路语音交换设备实现多个用户之间的语音通信,是现代办公常用的通信管理手段,包括数字信号处理(Digital Signal Processor,DSP)、用户线接口电路(Subscriber Line Interface Circuit,SLIC)等。重点论述DSP和SLIC的国产化,通过对比进口器件的功能指标,提出合理的国产化替代方式,并给出设备总的实现方案。最后,通过进行实验验证,为多路语音交换设备提供可量产的国产化实现方案。展开更多
文摘A flexible and extendible control mechanism for invoking services is required for taking full advantage of the potential B--ISDN services. In this paper, a flexible specification of signaling protocol based on an object-oriented call mode is proposed. The article’focuses on the protocol’s message syntax, message flow model, and applicability for defining multimedia and multiparty services.’
文摘The new type of embedded signal processing system based on the packet switched network is achieved. According to the application field and the-characteristics of signal processing system, the RapidIO protocol is used to solve the high-speed interconnection of multi-digital signal processor （DSP）. Based on this protocol, a kind of crossbar switch module which is used to interconnect multi-DSP in the system is introduced. A route strategy, some flow control rules and error control rules, which adapt to different RapidIO network topology are also introduced. Crossbar switch performance is analyzed in detail by the probability module. By researching the technique of crossbar switch and analyzing the system performance, it has a significant meaning for building the general signal processing system.
基金the Special Research Fund for the Doctoral Program of Higher Education(No.20050248037)the National Natural Science Foundation of China(No.50779033)
文摘The future generation networks or 4G networks constitute of varied technologies converged over the Internet protocol version 6(IPv6) core. The 4G networks offer varied services over different interfaces to the user nodes. Mobility management in 4G networks is an issue that exists. The handover protocols for mobility management in 4G networks that currently exist, do not consider wireless signal degradation during handover operations. This paper introduces the Noise Resilient Reduced Registration Time Care of Mobile IP(NR RRTC:MIP) protocol for handover management. A handover decision algorithm based on the signal strength measured by the user nodes is considered in the NR RRTC: MIP protocol. A simulation study is discussed in the paper to evaluate the performance of the NR RRTC: MIP protocol. The results obtained from the simulation study prove that the NR RRTC: MIP protocol effectively reduces handover latencies and improves network performance.
文摘网际互连协议(Internet Protocol,IP)传输技术正逐步取代传统数字分量串行接口(Serial Digital Interface,SDI)结构,推动演播室信号调度系统迈向网络化、模块化与智能化。围绕电视演播室核心业务流程,设计基于IP传输的信号调度系统,构建接入适配、拓扑规划、路由部署及冗余监控4个技术模块,明确各环节在全链路调度中的功能分工与技术路径。结合实际演播项目,验证量化IP传输技术在工程实践中的技术成效,结果表明IP信号调度体系具有优越的集成能力和高效的运行效率。
文摘多路语音交换设备实现多个用户之间的语音通信,是现代办公常用的通信管理手段,包括数字信号处理(Digital Signal Processor,DSP)、用户线接口电路(Subscriber Line Interface Circuit,SLIC)等。重点论述DSP和SLIC的国产化,通过对比进口器件的功能指标,提出合理的国产化替代方式,并给出设备总的实现方案。最后,通过进行实验验证,为多路语音交换设备提供可量产的国产化实现方案。
