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Architecture of High-speed Wireless ATM Network

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.

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Architecture of High-speed Wireless ATM Network

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  1. Architecture of High-speed Wireless ATM Network Original author: Anna Hac University of Hawaii at Manoa Presented by Wei Wang York University

  2. Contents • Background • AT&T’s solution • NEC’s solution • British Telecom’s solution • Cambridge’s solution • Conclusion

  3. Background • Design consideration:

  4. AT&T’s solution • “Distributed control” strategy • Call server – Call control • Connection server – Connection control • Channel server • Location management server

  5. AT&T’s solution (Con’d) Cluster-based multi network configuration

  6. AT&T’s solution (Con’d) • Three type of application: • Cellular phone applications • Laptop data applications • Multimedia-based applications • Distributed algorithms • Parallelism during call setup

  7. NEC’s solution • Multi-service wireless Personal Communication Network (PCN) • Retaining QoS classes • Providing extensions to ATM protocol • Compatible with fixed ATM network • 48-payload in PCN packet

  8. NEC’s solution (Con’d)

  9. 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

  10. BT’s solution • 3G - UMTS (Universal Mobile Telecommunication System) • Support a variety mobile functions • Intelligent Network-based architecture • Minimize burden caused by handoff • Use IN for handoff control • Increase Mobile Switching Center’s (MSC) processing capability

  11. BT’s solution (Con’d)

  12. Cambridge Solution • Wireless ATM LAN • Based on combination of hierarchical organization and distributed control and uniformity • Compatibility with ATM • Similar wireless ATM header

  13. Cambridge Solution (Con’d) • Handoff processing • Partial re-establishment • Crossover Switch (CX) • Distributed handoff management • Switch discovery mechanism

  14. Conclusion • Separation of connection, call and connection control • Hierarchical location management • Extension to existing ATM protocol stack • Mobility agents are used to lessen the burden on switches • Compatibility with existing ATM protocol

  15. Thanks • Any questions?

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