Comparison of Multicast Mobility Route Optimization

draft-von-hugo-multimob-ro-compa-00.txtAMT-approach (WG MBONED) and

proposed drafts within WG MultiMobD. von Hugo and H. Asaeda @IETF-80

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Requirements and charter demand• Issues in requirements draft deng-multimob-pmip6-requirements-03

– Conservation of (radio and backhaul) network resources• E.g. in terms of tunnel convergence, direct (local) routing option,

dedicated multicast LMA option, … • Set of ‘agreed on’ requirements to design/evaluate proposed approaches

for extensions/modification – Multimob base protocol(s)– Adaption of PMIPv6 as referred to in Multimob base protocol– IGMP/MLD extension (after completion of MLD parameter tuning)

• Updated Charter demands– Jun 2011 - Initial version of document on PMIPv6 routing

optimizations to avoid tunnel convergence problem

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How to achieve PMIPv6 routing optimizations

• Is there already an existing protocol (proposal)?– E.g. WG MBONED approach AMT

• If not which approach would solve the problem best?– Comparison of drafts

• I-D.asaeda-multimob-pmip6-extension• I-D.sijeon-multimob-mms-pmip6• I-D.zuniga-multimob-smspmip

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AddressingPMIPv6 routing optimizations to avoid tunnel convergence problem• I-D.ietf-mboned-auto-multicast AMT approach of WG MBONED (Multicast

Backbone Deployment) applied to PMIPv6

AMT GW@p-MAG

MN1

AMT GW@n-MAG

AMT relay@LMA AMT relay@LMA

Native Multicast Internet

PMIP6 domainAMT-Tunnel

MN2

MC source

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AddressingPMIPv6 routing optimizations to avoid tunnel convergence problem• AMT (Automatic Multicast communication without explicit

Tunnels)– may be applied to isolated multicast-enabled sites or hosts, attached

to a network without native multicast support - without need for any manual configuration.

– Analogy between AMT-Gateway/-Relay and PMIP MAG/LMA • also implies additional complexity

– Adaptation of this scheme to PMIPv6 domains means additional interface and tunnel beside existing MAG-LMA relation

– Local routing within PMIP domain seems to be more efficient via MLD

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AddressingPMIPv6 routing optimizations to avoid tunnel convergence problem

• I-D.asaeda-multimob-pmip6-extension proposes for a PMIPv6 domain the (dynamic or static) establishment of a common dedicated multicast tunnel. Both MAG and LMA may be operated as MLD proxy or multicast router.

3 different scenarios

• Open question: > 1 LMA per MN?

MLDproxy@p-MAG

MN1

MR@n-MAG

MLDproxy@LMA1

MC source Internet

PMIP6 domain Local MC source

M-Tunnel

MN2

MR@LMA2

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AddressingPMIPv6 routing optimizations to avoid tunnel convergence problem

• I-D.sijeon-multimob-mms-pmip6 describes a direct or local routing approach applicable to a network topology where multicast content delivery source is located in the same network such that the optimal multicast service delivery path is not via LMA.

• Support of optimal local (direct) routing uses a direct connection between MLD proxy at MAG and a Multicast router separated from LMA.

p-MAG

MN1

n-MAG

LMA

UC source

MR

Internet

PMIP6 domain

MN2

Local MC source

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AddressingPMIPv6 routing optimizations to avoid tunnel convergence problem

• I-D.zuniga-multimob-smspmip proposes a multicast traffic replication mechanism by introducing a Dedicated Multicast LMA (M-LMA) (allowing also a Hybrid U/M one) as topological anchor point for multicast traffic.

• Protocol complexity is reduced in terms of time consuming tunnel set-up by definition of pre- or post-configured tunnels between LMA and MAG.

p-MAG

MN1

n-MAG

LMA

MC source

DM-LMA

Internet

PMIP6 domain

MN28

Comparison of proposed approachesproposal Typical

featureBase multimob solution

MLD/MR Requires extensions

scalability

asaeda-multimob-pmip6-extension

M-tunnel Yes Both at LMA/alternative at MAG

To PBU, …CXTP

for dynamic tunnel management

sijeon-multimob-mms-pmip6

Direct routing via MR@MAG

No MR instead of LMA

no Yes - but only applicable to locally available MC content

zuniga-multimob-smspmip

M-LMA or Hybrid U/M-LMA

Yes Both at LMA/MLD@MAG

New BUL, policy profile, …

?

ietf-mboned-auto-multicast

AMT-Gate-way/Relay Relation

No no No Yes

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