NSIS Signaling Protocols

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--gt MN OAR
AR1 AR2 AR3 CRN CRN CRN CN

(OAR/AR1)(OAR/AR2)(OAR/AR3)

---QUERY(1)-gt--------------------gt-------------
---------gt

---QUERY(2)--------gt---------------------gt-----
---------gt

---QUERY(3)---------------gt---------------------
-gt------gt

Best path

Selection(4)


lt--RESERVE(5)--
lt------RESERVE(6)----- (Flow ID
(Actual reservation)
Update) lt----RESERVE(7)-----


lt-----------TEARDOWN(8)-------------


Multimedia Traffic
ltgtltgtlt
gt

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?