第三代移动通信系统WCDMA

本文首先介绍了第三代移动通信系统WCDMA中分组数据传输的结构、协议层以及信道结构,然后讨论了WCDMA对移动IP的支持.随着蜂窝网络对移动IP的充分支持,蜂窝网络和Internet结合将迅速发展.     

第三代移动通信系统WCDMA的分组数据传输

首先介绍了第三代移动通信系统WCDMA中分组数据传输的结构、协议层以及信道结构,然后讨论了WCDMA对移动IP的支持。随着蜂窝网络对移动IP的充分支持,蜂窝网络和Internet结合将迅速发展。     

第三代移动通信系统WCDMA和移动IP

本文首先介绍了第三代移动通信系统WCDMA中分组数据传输的结构、协议层以及信道结构,然后讨论了WCDMA对移动IP的支持。随着蜂窝网络对移动IP的充分支持,蜂窝网络和Internet结合将迅速发展。     

第三代移动通信系统WCDMA

在介绍了第三代移动通信系统WCDMA中分组数据传输的结构、协议层以及信道结构后，讨论了WCDMA对移动IP的支持，随着蜂窝网络对移动IP的充分支持，蜂窝网络和Internet结合将迅速发展。     

第三代移动通信系统WCDMA和移动IP

本首先介绍了第三代移动通信系统WCDMA中分组数据传输的结构、协议层以及信道结构，然后讨论了WCDMA对移动IP的支持。随着蜂窝网络对移动IP的充分支持，蜂窝网络和Internet结合将迅速发展。     

蜂窝IP的原理及实现机制

移动IP是一种简单可扩展的全球移动解决方案,但是它不能实现快速无缝平滑的切换控制。第三代蜂窝系统中为IP业务提供了平滑移动支持但是网络设施复杂。蜂窝IP提供了第三种解决方案,它结合了前两者的优点,利用了蜂窝系统平滑切换特性、激活和空闲主机的定位管理体现了IP网络快速、灵活和可扩展的要求。     

传统IP、移动IP和蜂窝IP技术研究及其分析

移动IP作为Internet的移动接入技术,为大范围内慢速的漫游提供了移动性支持。蜂窝IP解决了无线接入Internet主机频繁移动性问题,弥补了移动IP的不足,为基于小区的快速频繁的移动提供了有效支持。二者的结合能有效地支持全球范围内的主机的移动性。本文介绍了这两种协议,并对它们的网络实体和关键技术进行了探讨和分析。     

蜂窝IP的原理及实现机制

移动IP是一种简单可扩展的全球移动解决方案，但是它不能实现快速无缝平滑的切换控制。第三代蜂窝系统中为IP业务提供了平滑移动支持但是网络设施复杂。蜂窝IP提供了第三种解决方案，它结合了前两的优点，利用了蜂窝系统平滑切换特性、激活和空闲主机的定位管理体现了IP网络快速、灵活和可扩展的要求。     

传统IP、移动IP和蜂窝IP技术研究及其分析

移动IP作为Internet的移动接入技术，为大范围内慢速的漫游提供了移动性支持。蜂窝IP解决了无线接入Internet主机频繁移动性问题。弥补了移动IIP的不足，为基于小区的快速频繁的移动提供了有效支持，二的结合能有效地支持全球范围内的主机的移动性。本介绍了这两种协议 ，并对它们的网络实体和关键技术进行了探讨和分析。     

宽带无线IP系列标准支撑产业发展--宽带无线IP标准工作进展和展望

1 宽带无线IP标准工作组成立背景随着互联网和移动通信的迅猛发展,带来了在任何时间、任何地点都能享用互联网业务和其他人进行自由联系的需求,未来网络的发展重点是宽带IP网,这是由互联网的发展和IP协议在互联网中的地位所决定的。网络发展的趋势是IP化,不同形式的物理网在IP层得到统一,各种网络用IP协议实现互联互通。在宽带IP网中实现移动计算主要有两种发展方向:一是以现在的2.5G(如GPRS等)或3G(如WCDMA、TD-SCDMA等)蜂窝移动通信系统为基础向全IP网过渡。目前,蜂窝移动通信系统提供的主要业务是语音,需要通过改造来传输I…     

Packet mode in wireless networks: overview of transition to thirdgeneration

This article presents an overview of packet mode data transfer in cellular networks. Leading 2G+ cellular networks of GSM GPRS and IS-95B are introduced. The architecture and protocol layers in two leading third-generation cellular network proposals, cdma2000 and WCDMA, are presented. Mobile IP support in various cellular networks is discussed next. With efficient support of mobile IP in cellular networks, seamless integration of cellular networks with the Internet is expected to be reached at a rapid pace     

Combinatorial Mobile IP: A New Efficient Mobility Management Using Minimized Paging and Local Registration in Mobile IP Environments

Combinatorial Mobile IP, a new mobility management scheme for Mobile IP, is proposed and analyzed. We present how to adopt mobility management schemes on cellular networks and adapt them in Mobile IP without disrupting the nature of the Internet. We apply widely used mobility management schemes such as hierarchical architecture and paging in cellular networks to Mobile IP. We restrict paging to the area that has to be paged using local registrations. In this way, we show that the total signaling costs of Combinatorial Mobile IP are reduced compared to other micro-mobility protocols such as Mobile IP Regional Registration and P-MIP. Random walk on a connected graph is used to analyze the performance of Combinatorial Mobile IP.     

Mobility support for IP-Based networks

IP-based wireless networks will become the core of next-generation mobile networks. Mobility support plays an important role in all IP-based wireless networks for providing multimedia applications. In this article we address various major issues in mobility support for IP-based networks. Existing technology, including Mobile IP, Mobile IPv6, and other related techniques, are discussed. The issues of mobility support for wireless LANs, wireless WANs, 2-3G cellular networks, and next-generation heterogeneous mobile networks are also addressed in this article.     

Seamless Support for Mobile Internet Protocol Based Cellular Environments

Cellular is the inevitable architecture for the Personal Communication Service system (PCS) in the coming future. Access to the Internet via cellular networks is expected to become an essential portion of future wireless service offerings. Providing seamless support for IP based packet switched services has become an important issue.The Internet Engineering Task Force's (IETF's) mobile IP protocol offers a standard solution for wide-area mobility at the IP layer. However, Mobile IP does not solve all of the problems involved in providing mobile Internet access to cellular users, especially during handoff period. Thus, IPv6 might be a good candidate to solve this problem.IPv6 is a new version of the Internet Protocol that was standardized by the IETF. It supports mobility and is presently being standardized by the IETF Mobile IP Working Group. At the same time, cellular is an inevitable architecture for the Personal Communication Service system (PCS).This paper introduces the current cellular support based on the Mobile Internet Protocol version 6. We will point out the short-falls using Mobile IP and try to emphasize protocols especially for mobile management schemes that can optimize a high speed mobile station moving among small wireless cells. A comparison between those schemes and future work will be presented.     

Micro mobility in the IP networks

Wireless access to Internet services will become typical, rather than the exception as it is today. Such a vision presents great demands on mobile networks. Mobile IP represents a simple and scalable global mobility solution but lacks the support for fast handoff control and paging found in cellular telephony networks. In contrast, second- and third-generation cellular systems offer seamless mobility support but are built on complex and costly connection-oriented networking infrastructure that lacks the inherent flexibility, robustness, and scalability found in IP networks. This paper presents an overview and performance comparison of two of the main micro-mobility protocols, namely Cellular IP and Hierarchical Mobile IP with regards to the handoff process for UDP applications. The differences in the handoff quality of the two protocols are small and can be traced to design choices within the typical model. There are however significant differences regarding the processing requirement, routing efficiency and parameters relating to implementation and deployment.     

Home agent placement and IP address management for integrating WLANs with cellular networks

Seamless roaming between cellular networks (3G or upcoming 4G) and wireless local area networks can be provided using Mobile IP. However, GPRS/UMTS and 802.11-based WLAN networks have no native support for mobile IP. Mobile IP requires the deployment of home agents and a protocol between the mobile nodes, home agent, and corresponding nodes. We address the home agent placement and home address assignment issues for supporting mobile IP for heterogeneous roaming. Placement techniques for mobile IP home agents are presented including dynamic HA assignment in either WLAN or cellular network domains using the diameter mobile IP application. Next, we present several IPv4 home address assignment schemes for mobile nodes visiting in the WLAN domain such as NAT/NAPT traversal, reverse tunneling, and mobile VPNs. It is shown that HA placement and address management are orthogonal, and any combination is possible. Various architectures for both issues are evaluated against the optimal solutions     

分组数据模式在第三代移动通信系统中的应用

本文介绍了分组数据传输模式在目前主要的三种第三代移动通信技术WCDMA、cdma2000和TD-CDMA中的发展情况,分析了这三种系统的网络结构和空中接口协议分层,讨论了移动通信中分组模式与Internet的结合-移动IP在第三代系统中的应用。     

一种改进的支持无线IP网络的资源预留协议

移动IP技术能够支持基于IP的无线网络,资源预留协议(RSVP)用来保证多媒体传输的服务质量。然而把现有的RSVP应用于移动IP网络就会存在许多问题。提出了一种改进的RSVP支持方案(ERSVP)来实现无线IP网络的服务质量保证。ERSVP在分层网络中结合了MRSVP和RSVP隧道技术。根据性能分析,ERSVP方案能够获得比MRSVP较少的信令延迟、信令负载和资源耗费。     

Extensions for Internet QoS paradigms to mobile IP: a survey

Mobile IP has been chosen as the core mobility management mechanism for wireless LANs, 3G cellular networks, and, most recently, aeronautical networks. It is viewed as a key element in providing a universal roaming solution across different wireless access technologies. However, mobile IP in its basic form inherits the IP incapability to provide QoS guarantees. This results in mobile IP's lack of support for seamless intradomain mobility. This article surveys extensions that have been proposed to enhance the QoS functionality of mobile IP. It gives a brief overview of mobile IP and Internet QoS paradigms, and describes their general shortcomings with regard to QoS and mobility, respectively. It then discusses the extensions that have been proposed in the literature and provides a qualitative comparison.     

SMS-MIPv6: An End-to-End Mechanism for IPv6 Mobility Management in Mobile Networks

As IP has been extended from core networks to access networks, a mobile network can be considered as an overlay of a traditional cellular network and an IP network. SMS-MIPv6 attempts to integrate mobility management of these two kinds of networks. The basic idea behind SMS-MIPv6 is to exploit existing mobility management in the cellular network (i.e. in the form of well-defined short messages) to locate a Mobile Terminal (MT) in the IPv6 network. We should emphasize that the motivation of SMS-MIPv6 is not to replace or optimize existing mature mobility management schemes. On the contrary, as an entirely end-to-end mechanism for IPv6 mobility management, it provides an alternative mechanism for free peer-to-peer applications such as Voice over IP (VoIP) without support from mobile network operators. We describe the implementation of SMS-MIPv6 in detail and analyze its performance. The evaluation results show that SMS-MIPv6 achieves acceptable performance so that it can be deployed in most current mobile networks. It performs best in terms of signaling cost, data traffic overhead compared with Mobile IPv6 (MIPv6) and Proxy MIPv6 (PMIPv6). Moreover, SMS-MIPv6 can reduce the handover latency significantly, although it is considered as a mobility management scheme for global mobility. However, it increases the session initialization latency due to hybrid binding through the cellular network.