区分服务网络中SCTP协议的改进

针对双窗口算法难以判断包丢弃类型的问题,提出一种新的包丢弃类型判断方法,对SCTP协议的确认块进行扩展,从确认块中获取包丢弃类型信息。在NS2上进行仿真实验,实验结果表明,改进后的SCTP协议在吞吐率方面有显著提高。     

关于流传输协议SCTP的研究

流控制传输协议（Stream Control Transmission Protocol,SCTP）是一种可靠的传输协议,它在两个端点之间提供稳定、有序的数据传递服务,并且可以保护数据消息边界。与TCP和UDP不同,SCTP通过多地址主机（Mulci-homing）和多流（Multi-streaming）能提供这些收益,这两种功能均可提高可用性。     

SCTP与TCP的比较分析

随着VoIP和第3代移动通信的发展，SCTP协议的使用将会越来越多。从分组结构、安全性、多归属、流、数据的发送和接收等几个方面对SCTP和TCP进行了分析比较。说明了为什么SCTP比TCP更适合传送PSTN信令。     

信令网关仿真器的设计与实现

随着VoIP和第三代移动通信的发展，对信令网关的需求将会越来越多。因此，信令网关仿真器也有很大的发展前景。本文先后阐述了NO．7与IP的互通方式、信令网关仿真器的设计和实现。最后得出了实验结果。     

The design and evaluation of an end-to-end handoff management protocol

We introduce an efficient protocol for end-to-end handoff management in heterogeneous wireless IP-based networks. The protocol is based on the stream control transmission protocol (SCTP), and employs a soft-handoff mechanism that uses end-to-end semantics for signaling handoffs and for transmitting control messages. The design goal of this protocol is twofold—first, to reduce the home registration delay, and, second, to eliminate the tunnelling cost which exists in current proposals, such as Mobile IP and its derivatives. Furthermore, we propose successive enhancements to the initial mobility management framework for achieving better scalability. We present strong analytical and simulation-based results that show performance improvements over existing approaches. Antonios Argyriou is a Ph.D. candidate in the school of electrical and computer engineering, Georgia Institute of Technology. He received his M.S. degree from the Georgia Institute of Technology in 2003, and the diploma from Democritus University of Thrace in 2001, both in electrical and computer engineering. His research interests spawn in all aspects of computer networking while specific interests include wireless networks and multimedia communications. He is a student member of IEEE and ACM. Vijay Madisetti is a professor of electrical and computer engineering at the Georgia Institute of Technology. He splits his time among teaching, research and entrepreneurship. His interests are design, prototyping, and packaging of electronic systems, virtual prototyping, embedded software systems, and computer networks. He obtained his Ph.D. in electrical engineering and computer science from the University of California at Berkeley. He is a member of the IEEE and the Computer Society.     

基于SCTP的TLS应用

简要介绍SCTP和TLS协议,探讨TLS应用于SCTP的特点及要注意的问题,给出简单的演示程序,演示了基于SCTP的TLS应用,最后得出结论:某些具体应用并不需要对SCTP关联中的流分别应用TLS协议,在单一流中的协商的TLS环境可简单的应用到其他流。     

SS7 over IP的关键技术SCTP概述

介绍了SCTP在信令传输中的使用，随后就SCTP的基本特性、分组格式和协议行为进行了阐述。     

移动核心网电路域的VoIP演进

运营商传统电路交换网络发展遇到瓶颈,IP承载网技术发展更加成熟,移动核心网电路域的VoIP演进正逐步推进。文章对核心网VoIP演进带来的变化及承载网、核心设备如何保障语音业务质量、安全等进行了探讨。     

A Novel End-to-End Architecture for H.264 Video Streaming over the Internet

In this paper we propose a novel end-to-end architecture for H.264 unicast video streaming over the Internet. The proposed video streaming architecture is based primarily on a new transport layer protocol, the stream control transmission protocol (SCTP). We show that the network-friendly specification of H.264, and the novel technical characteristics of SCTP, when coupled together are able to provide a highly adaptive and flexible system for unicast video streaming. More specifically, we develop algorithms that handle at the transport layer the following functions concerning video packet transmission: retransmission policy, packet prioritization, implicit receiver feedback. We combine the above algorithms with an R-D optimization strategy at the encoder, that provides more options when adapting to bandwidth variations. This combined optimization strategy leads to more options concerning the streaming parameters. Finally, with simulation results we prove that our system is capable of maintaining good perceptual quality and TCP-friendliness under various loss conditions. An early version of this paper appeared in CCNC 2004.     

信令网关多模块方案的设计与研究

随着VoIP和第3代移动通信的快速发展,为了保护电信运营商在传统七号信令网络上的巨额投资,需要信令网关用来解决其中的信令承载转换与互通。信令网关SG是下一代网络(NGN-软交换)的核心网络单元之一,对信令网关的需求将会越来越多。阐述了信令网关的系统逻辑结构和CPCI信令处理系统,提出了线性分布式多模块方案,并对其做了详细的阐述。