Architecture of High-speed Wireless ATM Network

Original author: Anna Hac

University of Hawaii at Manoa

Presented by Wei Wang

York University

Contents

Background

AT&T’s solution

NEC’s solution

British Telecom’s solution

Cambridge’s solution

Conclusion

Background

Design consideration:

AT&T’s solution

“Distributed control” strategyCall server – Call control Connection server – Connection controlChannel server Location management server

AT&T’s solution (Con’d)

Cluster-based multi network configuration

AT&T’s solution (Con’d)

Three type of application:Cellular phone applicationsLaptop data applicationsMultimedia-based applications

Distributed algorithms

Parallelism during call setup

NEC’s solution

Multi-service wireless Personal Communication Network (PCN)Retaining QoS classesProviding extensions to ATM protocol

Compatible with fixed ATM network48-payload in PCN packet

NEC’s solution (Con’d)

NEC’s solution (Con’d)

Hierarchical architecture

Each PCN node contains:ATM switch, Multiplexer,Base station and

MSU

VCs are divided into fixed and dynamic segments

BT’s solution

3G - UMTS (Universal Mobile Telecommunication System)Support a variety mobile functions Intelligent Network-based architectureMinimize burden caused by handoffUse IN for handoff control

Increase Mobile Switching Center’s (MSC) processing capability

BT’s solution (Con’d)

Cambridge Solution

Wireless ATM LANBased on combination of hierarchical

organization and distributed control and uniformity

Compatibility with ATMSimilar wireless ATM header

Cambridge Solution (Con’d)

Handoff processingPartial re-establishmentCrossover Switch (CX)Distributed handoff managementSwitch discovery mechanism

Conclusion

Separation of connection, call and connection controlHierarchical location managementExtension to existing ATM protocol stackMobility agents are used to lessen the burden on switchesCompatibility with existing ATM protocol

Thanks

Any questions?