第三代移动通信中的服务质量及技术挑战

第三代移动通信(3G)系统将Internet和移动通信相结合，使得移动通信中业务的数量和种类得到前所未有的增长。各种实时和多媒体业务的不断涌现，要求提供端到端的服务质量(QoS)保证。与Internet相比，3G系统中的QoS具有自身的特点，给3G系统QoS的实现带来更大的技术挑战。本文总结了这一领域近年来众多的研究成果，对实现3G系统中的QoS所面临的挑战进行分析，指出了几种技术解决途径，提出了无线接口的QoS实现框架，最后展望了3G的未来及支持QoS的技术发展方向。     

3G手机VoIP话音的QoS实现技术研究

在对3G手机VoIP话音QoS的主要实现技术进行分析的基础上,提出了3G手机VoIP话音QoS新的实现技术。文中通过对实时传输控制协议（RTCP协议）的详细研究,同时根据3G系统无线信道的具体特点,说明了实时传输控制协议运用于3G手机VoIP话音的QoS控制中的缺陷,并阐述了相应的控制解决方法。在基于Android的3G智能手机的VoIP客户端软件中,综合运用VoIP话音QoS的主要成熟实现技术,同时结合文中提出的VoIP话音QoS的解决思路,实现了对VoIP话音的QoS的控制。基于Android的3G智能手机的VolP客户端软件通过在不同的网络环境条件下的测试,VoIP话音质量良好,说明文中提出的3G手机VoIP话音QoS新的实现技术具有一定的实用价值。     

GPRS网络中的QoS问题解决方案

在移动通信迅猛发展的今天,如何保证用户的QoS需求,使移动网可以根据不同的业务特点提供满意的服务,越来越受到行业人士的关注.本文重点讨论了2.5G和3G的QoS体系并针对现网出现的QoS问题提出了相应的解决方案.同时,本文明确的提出在2.5G和3G网络中SGSN是处理QoS属性的关键网元,SGSN设备能够提供各种QOS的兼容性是网络提供高质量业务的重要保证.     

一种4G中基于IP的QoS结构

4G系统将是一个在IP基础上融合的、具有多种异构性的网络。首先介绍了4G系统的基本场景,分析了传统Q oS机制的缺陷,然后提出了一种基于MRSVP/D iffServ的Q oS服务体系结构,以实现端到端的Q oS保证。     

基于IP的3G服务质量控制及实现

第三代移动通信系统 (3G)的第二阶段是采用IP传送网 ,服务质量 (QoS)是极其重要的问题。在讨论基于IP的 3G中QoS体系结构、业务QoS要求基础上 ,重点研究QoS控制原理和区分服务的实现 ,并得出一些有参考价值的结论。     

基于QoS的3G网络系统设计与研究

为了有效地解决无线通信网络在宽带业务不断增加时产生的拥塞问题,提出了将区分服务模型应用于第三代移动通信网络以满足不同业务对QoS的需求。详细分析了区分服务模型的关键技术以及区分服务模型的系统结构,将区分服务模型和第三代移动通信分组域核心网系统结合起来,设计了支持QoS的第三代移动分组域核心网络。实验表明提出的模型较好地解决了第三代移动网络分组域核心网的QoS问题,提高了对不同业务的服务质量。     

基于“IPv6+”的5G承载网切片技术与应用

5G承载网切片技术是满足5G业务,特别是垂直行业场景对差异化服务质量保证需求的基础。对如何在网络基础设施层、网络切片实例层以及网络切片管理层将“IPv6+”关键技术与承载网切片结合使用进行了研究。以北京联通为例,介绍了智能城域网向基于“IPv6+”的承载网切片演进的演进目标、应用场景、演进计划以及存在的问题与建议。     

Radio Network Aggregation for 5G Mobile Terminals in Heterogeneous Wireless and Mobile Networks

This paper provides a novel design concept for advanced mobile multi interface terminals with radio network aggregation capability and enhanced quality of service (QoS) provisioning for multimedia services (voice, video and data) in heterogeneous wireless and mobile networks. A new module is established which provides the best QoS and lowest cost for any given multimedia service by using simultaneously all available wireless and mobile access networks for a given traffic flow. This novel adaptive QoS module with adaptive QoS routing algorithm is called advanced QoS routing algorithm (AQoSRA), which is defined independently from any existing and future radio access technology. The performance of our proposal is evaluated using simulations and analysis with multi-interface mobile stations with AQoSRA within, carrying multimedia traffic in heterogeneous mobile and wireless environment with coexistence of multiple Radio Access Technologies, such as 3G, 4G as well as future 5G radio access networks. The analysis of the proposed framework for radio networks aggregation in advanced mobile terminals has shown overall better performances regarding the achievable throughput and multimedia access probability in heterogeneous wireless and mobile environment.     

3G和WLAN集成网络中的QoS的研究

将WLAN和3G结合,已经成为一种趋势.因此,需要考虑WLAN和3G结合的QoS问题.在这篇论文中,主要研究了将3G和802.11e相结合,为WLAN和3G集成网络的用户提供端到端的QoS业务.通过仿真,研究了WLAN误码率对3G业务类别传输吞吐量的影响.     

端到端服务质量(QoS)体系建设探讨

本文简要介绍了服务质量QoS相关概念.以即将到来的下一代网络(NGN)和2G/3G融合网络为例,分别从两者的内涵和体系结构出发,阐述了其中QoS框架模型和新业务体系建设.     

QoS Provisioning with New Effective Bandwidth/Buffer Calculation Scheme in Wireless IP Networks

The huge commercial success of mobile telephony, the phenomenal growth of Internet users, the popularity of IP-based multimedia applications are the major driving forces behind third-generation (3G), ongoing Byond 3G (B3G), and forth-genertion (4G) evolution. 3G brought wired applications, both data and multimedia, into wireless environments. It operates on IP-based infrastructures to provide wider service access capability. To support and satisfy QoS (Quality of Service) of diverse IP-based multimedia applications, traffic management, such as Connection Admission Control (CAC) and resource allocation, becomes essential. CAC and resource allocation are computationally complex when combined with QoS guarantee for traffic with different characteristics. However, CAC and resource allocation are real-time traffic control procedures. Hence, processing load should be minimized to reduce delay. At the same time, network resources should be utilized efficiently to accommodate more users. However, reducing processing load and obtaining high resource utilization efficiency has been considered to be contradictory matter. In addition, CAC and resource allocation schemes which consider multiple QoS criteria – loss and delay – simultaneously have not been adequately studied. Simultaneous QoS consideration is important to satisfy stringent and diverse QoS requirements of multimedia traffic. In this paper, we propose a nobel effective bandwidth/buffer calculation method based on a virtual channel/buffer analysis scheme. We show that our method can achieve high resource utilization efficiency with reduced processing load. Moreover, we show that our scheme allows for simultaneous consideration of multiple QoS criteria, loss and delay.     

Resource management and quality of service in third generationwireless networks

The third generation networks and services present opportunities to offer multimedia applications and services that meet end-to-end quality of service requirements. The key parts of the standards are already in place, and limited 3G services have already been turned on. While the evolution to 3G occurs, many operators will implement 2.5G interim solutions for a good period of time. We discuss the various evolution scenarios from the present 2G networks to 3G networks. Then we present the UMTS QoS architecture and its requirements, followed by a discussion on QoS in 3G air interfaces, radio access network, and core network     

5G mobile terminals with advanced QoS-based user-centric aggregation (AQUA) for heterogeneous wireless and mobile networks

In this paper we present an advanced QoS provisioning module with vertical multi-homing framework for future fifth generation (5G) mobile terminals with radio network aggregation capability and traffic load sharing in heterogeneous mobile and wireless environments. The proposed 5G mobile terminal framework is leading to high performance utility networks with high QoS provisioning for any given multimedia service, higher bandwidth utilization and multi-RAT capabilities. It is using vertical multi-homing and virtual QoS routing algorithms within the mobile terminal, that is able to handle simultaneously multiple radio network connections via multiple wireless and mobile network interfaces. Our 5G proposal is user-centric, targeted to always-on connectivity, maximal network utilization, maximal throughput, seamless handovers and performances improvement by using vertical multi-homing, as well as session continuity. The performance of our proposed mobile terminal framework for 5G is evaluated using simulations and analysis with multimedia traffic in heterogeneous mobile and wireless scenarios with coexistence of multiple radio access technologies, such as 3G, 4G as well as future 5G radio access networks.     

Power control and scheduling for guaranteeing quality of service in cellular networks

Providing quality of service (QoS) guarantees is important in the third generation (3G) and the fourth generation (4G) cellular networks. However, large‐scale fading and non‐stationary small‐scale fading can cause severe QoS violations. To address this issue, we design QoS provisioning schemes, which are robust against time‐varying large scale path loss, shadowing, non‐stationary small scale fading, and very low mobility. In our design, we utilize our recently developed effective capacity technique and the time‐diversity dependent power control proposed in this paper. The key elements of our QoS provisioning schemes are channel estimation, power control, dynamic channel allocation, and adaptive transmission. The advantages of our QoS provisioning schemes are (1) power efficiency, (2) simplicity in QoS provisioning, (3) robustness against large‐scale fading and non‐stationary small‐scale fading. Simulation results demonstrate that the proposed algorithms are effective in providing QoS guarantees under various channel conditions. Copyright © 2006 John Wiley & Sons, Ltd.     

移动IP技术在超三代移动通信系统中的应用

阐述了B3G系统中的无缝移动技术，探讨了移动IP在网络切换、移动性管理等方面的策略及对QoS的影响，在分析比较MIPv6基本模型、分层模型和快速切换模型的基础上，提出基于QoS的移动代理扁平架构。     

宽带CDMA IP网中实现区分服务的QoS结构

3G CDMA网提供高速无线IP服务,其业务主要包括数据、语音互式多媒体。为了能保证这些异构业务的QoS,并提供业务区分,将有线IP网的分区服务（DIFFSERV）QoS模型引入3G CDMA网络。针对无线网络的终端移动性、高丢失率、更低的网络带宽等特点,对原有的DIFFSERV结构进行了修改,给出了基于DIFFSERV的无线QoS结构,并简单描述了实现协议。还给出了有效带宽的录入控制策略和资源预留策略来实现QoS。通过仿真,研究了各种策略的性能。     

Class-based quality of service over air interfaces in 4G mobilenetworks

We present a framework for quality of service provisioning over the air interfaces in future wireless networks, including 3G enhancement and 4G mobile networks. The framework is based on the paradigm of service classes, wherein each class can exhibit a characteristic behavior in terms of resource allocation over the air interface. Using this QoS framework, future wireless network operators can define their own sets of service classes, choose the preferred way of implementing the QoS behavior of these classes, and offer class-based pricing schemes. The user application can choose the service class that best suits its expectations in terms of QoS and cost of access. A class-based bandwidth scheduling scheme is described as a mechanism to implement this QoS framework over CDMA air interfaces. This scheme incorporates the paradigm of service classes, in conjunction with fair resource allocation and air interface congestion resilience, while allocating air interface bandwidth to mobile users     

A framework for dynamic SLA-based QoS control for UMTS

With the evolution of QoS-capable 3G wireless networks, the wireless community has been increasingly looking for a framework that can provide effective network-independent end-to-end QoS control. In this article we first construct such a framework and then describe how dynamic SLA-based control can be used to achieve end-to-end QoS in a wired and wireless (UMTS) environment. The proposed framework, which is an extension to the IST CADENUS project, offers effective wired-wireless QoS translation, efficient QoS control and management, and dynamic SLA policy-based QoS provisioning.     

WCDMA核心网QoS参数的研究

从3G业务QoS入手,对影响用户感知的Traffic class、THP、ARP等3项关键参数进行了重点研究,并结合现网进行了实际测试和信令跟踪。从信令消息中得到RAB指配消息中QoS参数的实际取值,进一步由RNC利用相关参数进行资源分配和调度控制,最终实现不同用户的不同服务保障。     

一种基于分层架构的端到端QoS保障系统与方法

随着互联网+、NFV/SDN、5G/MEC、业务编排器的快速发展,业界对端到端质量保障需求旺盛,通过研究一种基于分层架构的端到端QoS保障系统与方法,采用新的QoS质量保障系统,通过省级业务编排器,与全国业务编排器、省分/地(市)核心云、地(市)边缘云、省内核心网、城域网、传输网、宽带网对接为全网提供端到端的全业务Qo...