Mobile Networks and Applications

, Volume 1, Issue 2, pp 123–139

Connection architecture and protocols to support efficient handoffs over an ATM/B-ISDN personal communications network

  • Oliver T. W. Yu
  • Victor C. M. Leung


The next generation personal communication network will likely internetwork wireless networks via the ATM/B-ISDN to enable ubiquitous broadband personal communication services. Support of user terminal mobility, particularly the capability for fast and seamless handoffs, over the ATM/B-ISDN is an expected requirement that is not currently met. We propose extensions to the ATM/B-ISDN user transport and signaling network architectures and signaling protocols to meet these requirements. The new architecture employs the Mobile Virtual Circuit (MVC), a dynamic connection tree in which routes are predetermined but not set up for potential handoff connections. During a handoff, associated signaling using source-routing with a new robust adaptation feature is employed for fast resource allocation to establish the handoff connection by distributed control. We also address the new problem of packet ordering synchronization to enable a seamless handoff. The connection tree reconfigures after each handoff to enable continuous support of successive handoffs. The proposed scheme optimizes handoff delay over the ATM/B-ISDN while minimizing unnecessary resource allocation, chances of handoff failure, and call processing load in the intelligent network, and the extensions are backward compatible to current ATM/B-ISDN standards and implementations.


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Copyright information

© Baltzer Science Publishers BV 1996

Authors and Affiliations

  • Oliver T. W. Yu
    • 1
  • Victor C. M. Leung
    • 1
  1. 1.Department of Electrical EngineeringThe University of British ColumbiaVancouverCanada

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