WiMAX与3G/4G融合的统一架构与关键技术

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"这篇论文探讨了WiMAX与3G/4G系统之间的互操作性问题，提出了两种先进的功能架构：Radio Control Server (RCS)和基于Access Point (AP)的集中式架构，以支持不同无线接入技术的协同管理。关键词包括Beyond 3G/4G、WiMAX、互操作性、通用链路层(GLL)和多无线电资源管理(MRRM)。通信作者是北京邮电大学的博士Mugenpeng教授。" 在未来的网络环境中，多种不同的网络拓扑需要共存或互联，这对运营商来说极具吸引力，但同时也给网络设计师带来了挑战，因为他们需要管理和协调各种不同的无线接入技术。论文提出的解决方案是，设计一套统一的架构来支持WiMAX与3G/4G系统之后的网络之间的互操作性。首先，Radio Control Server (RCS)是一个关键组件，它负责控制和协调不同的无线接入网络，确保它们能够无缝协作。RCS可能包含了策略决策、资源分配和优化等功能，以实现跨技术的高效数据传输和服务质量(QoS)保证。其次，基于Access Point (AP)的集中式架构则强调了在单一控制点下对多个接入点的管理。这种架构可以提高网络的灵活性和效率，通过集中控制AP，可以更好地处理用户漫游、资源调度和负载均衡等问题，同时简化网络运维。此外，论文中提到了通用链路层(GLL)的概念，这是实现不同无线技术间互操作的关键层次。GLL可能提供一种标准化的接口，使得WiMAX与3G/4G系统能够在链路层进行无缝对接，从而简化协议栈的设计和兼容性问题。多无线电资源管理(MRRM)是另一个核心技术，它涉及到如何在多种无线技术之间有效地分配和管理有限的频谱资源。MRRM策略可能包括动态频谱共享、跨技术的资源调度和自适应带宽分配等，旨在最大化网络容量和用户体验。这篇论文通过提出RCS和基于AP的集中式架构，以及GLL和MRRM等关键技术，为解决未来网络中WiMAX与3G/4G系统之间的互操作性提供了理论基础和技术路径，对于推动下一代移动通信网络的发展具有重要意义。



Abstract—A multitude of different network topologies will have

to coexist or be inter-connected in the future, which is more

attractive to the operators but presents a major challenge to the

network designers as management of different radio access

technologies in cooperative fashion is required. This paper

proposes two advanced functional architecture supporting the

functionalities of interworking between WiMAX and beyond

3G/4G systems: Radio Control Server (RCS) and Access Point (AP)

based centralized architectures. The definitions of both the control

and user planes are presented. The key techniques supporting the

interworking between WiMAX and beyond 3G/4G systems are

described, which include the key mechanisms in Generic Link

Layer (GLL), key mechanisms in Multi-Radio Resource

Management (MRRM), end-to-end Quality of Service (QoS)

provision, and heterogeneous paging mechanisms. The solutions

for these four key mechanisms are investigated, and some

proposals are presented. Especially, the heterogeneous paging

procedures for the convergence of WiMAX and beyond 3G/4G are

proposed and evaluated, which can decrease the transmission load

and save the power consumption.

Index Terms—Beyond 3G/4G, WiMAX, interworking, Generic

Link Layer (GLL), multi-radio resource management (MRRM)

I. INTRODUCTION

obile communication is continuously one of the hottest

areas that are developing at a booming speed, with

advanced techniques emerging in all the fields of mobile and

wireless communications. Current times are just the beginning

for deploying the third generation (3G) mobile communication

systems, while research on the next generation of mobile

communications, beyond 3G or the forth generation (4G)

wireless and mobile networks begin to pave the way for the

future because 3G still leaves some unsolved problems that it

does not concern or concerns only partly. The limitations and

difficulties of 3G include: (1) 3G performance may not be

sufficient to meet needs of future high-performance applications

like multi-media, full-motion video, wireless teleconferencing.

A network technology that extends 3G capacity by an order of

magnitude is necessary. (2) There are multiple standards for 3G

Supported in part by the National Natural Science Foundation of China under

Grant No. 60572120 and No. 60602058. sponsored in part by the national

advanced technologies researching and developing programs. (China 863

programming, NO.: 2006AA01Z257).

making it difficult to roam and interoperate across networks.

The global mobility and service portability is needed. (3) 3G is

based on primarily a wide-area concept. The hybrid networks

that utilize both wireless LAN (hot spot) concept and the cell or

base-station wide area network is designed. (4) The wider

bandwidth is used to support higher transmission bit rate. (5)

Researchers have come up with spectrally more efficient

modulation schemes that can not be retrofitted into 3G

infrastructure.

4G is simply an initiative by academic R&D labs to move

beyond the limitations and problems of 3G which is having

trouble getting deployed and meeting its promised performance

and throughput. Therefore beyond 3G can be considered as a

transition from 3G to 4G. Such a system should be designed

with enough scalability and satisfaction for many requirements

of 4G [1].

In this thesis, one of the most important aims of next

generation mobile communications systems: Super 3G(also

named as 3G long term evolution, LTE, Beyond 3G, 4G and

even 5G) is to achieve the inter-operation of heterogeneous

networks such as WLAN, 3G, Digital Broadcasting (DVB), etc.

This will result in capabilities that enable people and their

machines to access information anywhere, anytime, in any

medium or combination of media in a cost-effective and secure

manner that are the main goal. But to achieve this goal, the

following challenges must be met: (1) Interworking of fixed and

mobile networks, (2) Mobility among heterogeneous access

networks, (3) Mobile users and network agents, and (4)

Reconfigurable terminals and networks. This paper expects to

introduce the key mechanisms in the interworking between

WiMAX and beyond 3G/4G, which will promote the innovative

mechanisms to facilitate the system control techniques on the

interworking.

The remainder of this paper is organized as follows. In

section II, the necessary of interworking between WiMAX and

beyond 3G/4G is introduced. Section III proposes two novel

protocol architectures for supporting the interworking. The key

techniques for protocol implementation in those research areas

are further examined in section IV. Finally, a summary is

discussed in section V.

Mugen Peng, Wenbo Wang

Wireless Signal Processing & Network Lab, Beijing University of Posts and Telecommunications,

P.O.Box 93, No.10 Xi Tu Cheng Road, Beijing 100876, China. Tel: +86-10-62282977. Email:

pmg@bupt.edu.cn

A Unified Architecture and Key Techniques for

Interworking between WiMAX and Beyond

3G/4G Systems

* Manuscript

Click here to download Manuscript: v04.doc

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