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NSIS Signaling Protocols in Multihomed Mobile Networks

NSIS Signaling Protocols in Multihomed Mobile Networks. draft-lee-nsis-multihoming-mobility-00 Suwon Lee, Sung-Hyuck Lee, Seong-Ho Jeong Jong Ho Bang, Byoung-Joon Lee. Overview. Motivation Benefits of multihoming (path-oriented signaling in mobile networks)

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NSIS Signaling Protocols in Multihomed Mobile Networks

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  1. NSIS Signaling Protocols in Multihomed Mobile Networks draft-lee-nsis-multihoming-mobility-00 Suwon Lee, Sung-Hyuck Lee, Seong-Ho Jeong Jong Ho Bang, Byoung-Joon Lee

  2. Overview • Motivation • Benefits of multihoming (path-oriented signaling in mobile networks) • NSIS signaling can be used in various multihoming scenarios • This draft discusses • Basic NSIS operations in multihomed environments • NSIS applicability in multihomed scenarios • Link/node failure • Load balancing • Load sharing

  3. Problem Statements (1/2) • Multihomed environment • Multiple addresses (CoAs, HoAs), multiple interfaces (homogeneous, • heterogeneous), multiple paths • Registration of multiple CoAs • To provide multiple active CoAs • Out of scope of NSIS WG • Selection of the optimal path for QoS • Selection (combination) of appropriate interfaces • Multiple NSIS messages (e.g., QUERY messages of QoS-NSLP) • Notification of alternative path • A mechanism is needed to convey alternative addresses

  4. Problem Statements (2/2) • Path failure/media detection • To trigger NSIS operations • Interworking between resource reservation and binding update • To reduce state setup delay • Anticipated handover support • To support efficient handover

  5. Basic NSIS operations in multihomed networks • Path selection • Gathering path information • Selecting the best path • Receiver-initiated approach • MN: multiple QUERY messages • CN: path selection / RESERVE message • Sender-initiated approach • MN: multiple QUERY messages • CN: RESPONSE message • MN: path selection / RESERVE message • Alternative method • MN: both QUERY messages and Binding Update messages concurrently

  6. Basic NSIS operations in multihomed networks (Receiver-initiated approach) |--Handover-->| MN OAR AR1 AR2 AR3 CRN CRN CRN CN (OAR/AR1)(OAR/AR2)(OAR/AR3) | | | | | | | | | |---QUERY(1)->|-------------------->|---------------------->| | | | | | | | | | |---QUERY(2)-------->|--------------------->|-------------->| | | | | | | | | | |---QUERY(3)--------------->|---------------------->|------>| | | | | | | | | | | | | | | | | | Best path | | | | | | | | Selection(4) | | | | | | | | | | | | | | | |<--RESERVE(5)--| | | | |<------RESERVE(6)-----| (Flow ID | | | | | (Actual reservation) | Update) | |<----RESERVE(7)-----| | | | | | | | | | | | | | | | |<-----------TEARDOWN(8)-------------| | | | | | | | | | | | | | | | Multimedia Traffic | | | |<==================>|<====================>|<=============>| | | | | | | | | |

  7. NSIS Applicability in multihomed scenarios • Link/node failure • Re-directing the connection through alternative interface (path) • Load balancing • Multiple paths (interfaces) for the same application • New traffic management mechanism • Sender: distribution of data packet to appropriate interfaces • Intermediate nodes: aggregation of flows • Receiver: assemble and re-ordering of received packets • Load sharing • Multiple paths (interfaces) for multiple applications • Intermediate nodes • Aggregation of flows when the CN is same: BOUND_SESSION_ID

  8. Next Steps • More details on solutions • Basic multihoming support • NSIS applicability scenarios • Site-multihoming support • Question • Should these NSIS multihoming-related issues be a WG item?

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