Access to IP Multimedia Subsystem of UMTS via PacketCable Network

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Access to IP Multimedia Subsystem of UMTS via
PacketCable Network

• Mehdi MANI, Noël CRESPI
• INT-GET FRANCE

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Concept
SIP
PacketCable Access
GGSN
SGSN
S-CSCF
P-CSCF
Packet Switched domain
IP Multimedia Subsystem
3GPP Radio
CMS
IP networks

PSTN
Router
WLAN access
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Outlines

• Definition of Multi-Access to IMS and its
  importance
• An introduction to PacketCable Architecture
• Different Strategies and Benefits of
  Interconnection between PacketCable and IMS of
  UMTS
• Different Phases for a successful Interconnection
• Conclusion and Summery

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Multi-Access to IMS

• Definition
• Bearer Interconnection of different access
  networks to a unique IP core network
• Access to IP Multimedia Subsystem (IMS) of UMTS
  via different kinds of wire and wireless access
  networks.
• Benefits
• Accesses with different capabilities (Bandwidth,
  PER, Data Rate, Price,), equipments, usage,
  devices and not limited to UTRAN
• Sharing Infrastructure
• Variation in Proposed Services

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Multi-Access Challenges

• Master/Slave Operators
• Complexity
• Extendibility and Scalability
• Security
• AAA functions

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PacketCable Architecture

• In PacketCable MM architecture CMS is split over
  two separate entities AM and Policy Server (PS)

• Aim Enabling a wide variety of IP-Based
  multimedia services over two way hybrid
  fiber-coax (HFC) cable access systems
• Architecture Three underlying networks provide
  service HFC, Managed IP Network, and the PSTN
• Seeking for inter-connection with cellular
  networks

• Application Manager (AM)

• CMS

• CA

• Policy Server

• GC

• Managed IP Network 1

• CM

• MTA

• CMTS

• HFC

• BP

• Managed IP Network 2

• CM

• MTA

• CMTS

• HFC

TG
PSTN
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Limitation for interconnection of PacketCable and
IMS

• Non-intelligent end-points in PacketCable
• Services are not adapted for mobile users
• No support of SIP user name in PacketCable
• IPv4-IPv6 interconnection (need for SLG)

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Different Phase of InterConnection

• Attaching to UMTS-CN Authentication
• IP Connectivity Getting an IP Address
• Getting Setup for a service DHCP
• Service Registration Discovering the service and
  Registration (using SIP)
• Multimedia Session Establishment

S-CSCF
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Interconnection Scenarios

• Access of PackeCable subscribers to the IMS
  services
• Access of UMTS subscribers to their home services
  via PacketCable

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InterConnection Establishment
Scenario 1 Allocate a SIP ID Register on behalf
of The User Translate The User Signaling
Policy Repository
3G Domain
PacketCable Domain
AAA
AAA
SLA
UBP
S-CSCF
PDG
UBG
Scenario 2 Act As a Forward Proxy A limited
Authentication
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The Complete Approach
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Summary

• This interconnection opens new services for the
  subscribers of these networks
• With these modification PacketCable can support
  SIP based (intelligent) end users
• There is not need anymore to pass through PSTN
  for interconnection to cellular networks
• Cellular Users can benefit high quality and large
  bandwidth of PacketCable for their access too.
• Wireless Cable-Modems can support even seamless
  vertical handover between Cellular and
  PacketCable
• Users have more freedom in their end-device
  selection

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Questions and Comments
?