mobility in content delivery 79 th ietf beijing, november 2010 gyu myoung lee...
TRANSCRIPT
Until now
Device mobility, user mobility, session mobility Multicast source mobility for future work
The PMIP MN may be a multicast source. LMA which is a fixed node for MN can act as RP. SPT can also refreshed in a network-based manner.
2
New item proposal Content mobility
Multicast server handoff Content moving
c1c1
user1
c2
User 1user1
c1c1c1c1
User mobility User mobility
C1 C1,C2
c2
C1
c1c1
user1 User 1user1
c2c2c3c3
User mobility User mobility
C1 C1
C1
c2
c3
c3
C1 C1,C2 C1,C2,C3
signaling
signaling
Content from same server (without content mobility)
Content mobility (content moving)
C: Content
Part or whole of content
U4
c2c1c1c1c1
User mobility
User mobility
C1
c2 c3
Mul
ticas
t
C1 C2 C2,C3
signaling
U3 U6U1 U4U2 U5 U3U4U7 U3
U4U4
U4 moves and join another multicast group retrieving
the same content
U4 moves. No available multicast group for the same content. So continue with unicast session
Mul
ticas
t
Mul
ticas
t
Uni
cast
G1 G2 G3 G4
C1 C1 C1
c1c1
Content movingMulticast server handoff
Proposal: Content mobility (multicast server handoff, content moving)
C: ContentG: Multicast GroupU: User
Distributed multicast
sources
Benefits Lower delay, Network resource optimization, Local routing
Challenge Maintaining user’s mobility while changing multicast sources
Next Steps
Discussion Is this topic acceptable in the multimob WG for future work?
Plan Develop an I-D on this topic for next meeting
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Q&A