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Hong CHENG, Kim Hui LING IETF #59 – Seoul March 2004

Mobility related issues for the QoS NSLP draft-cheng-mobility-issues-01.txt http://www.psl.com.sg/draft-cheng-mobility-issues-01.txt. Hong CHENG, Kim Hui LING IETF #59 – Seoul March 2004. Need for multiple flows management. Problem: Support for multiple flows reservation

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Hong CHENG, Kim Hui LING IETF #59 – Seoul March 2004

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  1. Mobility related issues for the QoS NSLPdraft-cheng-mobility-issues-01.txthttp://www.psl.com.sg/draft-cheng-mobility-issues-01.txt Hong CHENG, Kim Hui LING IETF #59 – Seoul March 2004

  2. Need for multiple flows management • Problem: Support for multiple flows reservation • Different multiple flows scenarios • Numerous sub flows for one application session • Multiple access interface for one network node (multi-homing) • Multiple flows during a mobile soft handover • Issues • Distinction between multiple flows reservation and single flow handover • Need to inform the network on the treatment of the old flow after a new flow setup

  3. Solution for multiple flows management • MN indicates action on the old flow to the network • Old_Path_Action option in NSLP messages • No action • Teardown immediately • Gradual Teardown • Delayed Teardown with timer • Reduce resource reservation to zero • Usage of Old_Path_Action options • Present in the setup message of the new flow • Old path action is triggered after new flow establishment

  4. Multiple flows in a mobile handover • Ping-pong type handover • Staggering movements between 2 access networks • Slow old path re-establishment

  5. Multiple paths in a mobile handover • Solution • Reduce resource reservation in old path to zero • States and peer-peer association retained

  6. Questions?

  7. Old path restoration • Accelerated old path restoration • No reverse path setup required • No peer-peer discovery required • No state setup required • RESERVE message for state modification • Crossover node responsibility • Maintain peer-peer message associations for multiple paths • Direct and send messages on the correct paths

  8. Old path recognition

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