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Providing Quality of Service to Real-time Traffic through Multipath Discovery

Providing Quality of Service to Real-time Traffic through Multipath Discovery. Wang Huiqing Supervisor: Dr. Yow Kin Choong. Mobile Ad Hoc Networks. Features: Dynamic Topology Bandwidth constrained : variable capacity links Power constrained operation

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Providing Quality of Service to Real-time Traffic through Multipath Discovery

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  1. Providing Quality of Service to Real-time Traffic through Multipath Discovery Wang Huiqing Supervisor: Dr. Yow Kin Choong

  2. Mobile Ad Hoc Networks Features: • Dynamic Topology • Bandwidth constrained : variable capacity links • Power constrained operation • Limited physical security

  3. QoS for Real-time Traffic • Multimedia applications • Mission-critical applications • Potential commercial usage of MANET

  4. Challenge for QoS In MANET • Imprecise link state information • Fragile end-end link • Limited bandwidth

  5. Review of routing protocol • Most (e.g. AODV, DSR) discover and maintain only one path without QoS • TORA and other protocols (MNH, AOMDV, SMR ) provide multipath, but not take QoS issue into consideration • QoS-aware MP-DSR provide multi reliable paths, not support real-time traffic

  6. Multipath Discovery with QoS • Discover and maintain multi paths satisfying the QoS requirement for real-time traffic • Activate one path for real-time traffic • Switch to the alternate path when the activating one fail to offer QoS

  7. Multipath Discovery with QoS Initiate route request A I S B D C J

  8. Multipath Discovery with QoS Establish qualified link A I S B D C J

  9. Multipath Discovery with QoS Destination receive route request A I S B D C J

  10. Multipath Discovery with QoS Route established A I S B D C J

  11. Multipath Discovery with QoS Link fail A I S B D C J

  12. Multipath Discovery with QoS Switch to alternate path A I S B D C J

  13. Multipath Discovery with QoS Maintain the other path A I S B D C J

  14. Special issue: path disjoint Link-disjoint A I S B D C J

  15. Special issue: path disjoint Node-disjoint A I S B D C J

  16. Current research objective • Utilize the existing information in the underlying routing protocol as much as possible • Devise route discovery algorithm providing node-disjoint multipath • Effectively estimate the network traffic

  17. THANK YOU!

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