( [e-mail] )

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VoIP ??? ??? ?? ??? ?? - IMS?? VoIP ? ?? ? ??? -

• 2006. 6. 13
• ? ? ? ? ?
• ? ? ?
• ( yhkim_at_dcn.ssu.ac.kr )

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? ?

• Cable network VoIP? ?? signaling protocol ??
• MGCP vs. SIP(IMS)
• ? packet cable??? Protocol
• 3GPP IMS??? SIP
• NGN?? ?? ?? IMS ????

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PacketCable 1.5 Architecture Framework
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NCS, DQoS (Dynamic QoS)
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NCS (Network-based Call Signaling)

• NCS has been modified from MGCP 1.0
• NCS protocol only aims at supporting PacketCable
  E-MTA
• NSC protocol contains extension and modification
  to MGCP
• NCS protocol contains minor simplifications from
  MGCP 1.0

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MGCP (Media gateway control protocol)??
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Packet cable??? SIPCMSS(CMS to CMS Signaling)

• NCS and TGCP are used to communicate between
  limited-function multimedia end-points
• CMSS covers the signaling performed between CMSs
  SIP based

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CMSS(CMS to CMS Signaling)

• Trusted Domain of PacketCable Service Provider

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SIP-based Services in PacketCable

• SIP is supported in videoconferencing, VoIP, web
  services, wireless environments, etc
• need to provide the consistent Quality of
  Service (QoS) for the SIP services? couple SIP
  with PacketCable-Multimedia (PCMM)

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PCMM Architecture
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SIP-Adopted by various standards bodies

• GSM/3GPP, CDMA/3GPP2 SIP in 3G cellular
  networks
• International Softswitch Consortium SIP as
  inter- softswitch protocol (SIP-T)
• SUN/JAIN Standard JAVA API for SIP
• International Telecommunication Union (ITU)
• International Multimedia Telecommunications
  Consortium (IMTC)

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SIP The Future

• Cellular networks are going to be SIP end-to-end
• Fixed telephony networks are going to be SIP
  end- to-end
• SIP will be used for converged services on
  Handheld devices
• SIP will enable Gaming applications

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3GPP IMS (IP Multimedia Subsystem) ??? SIP
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NGN/BcN? ??

• ??? ?? ??
• ???, ??, ??, ??? ??? ???
• ??, ??? ??? ?? ? ??
• ??? ????? ??
• ??? ??? ????
• ??? ??? ???? ??
• ??? ????? ??? ??
• IP ??? ?? ???? ???
• ??/???/????? ??? ? ?? ???? ??? ???? ????? ??
• ???, ???, ????? ?? ?? ??
• ??? ?? ? ???? ?? ???? ??? ? ?? ???? ?? ????

15
?? ???? ?? ? ??
16
?? ???? ?? ? ??

• ???/?? ???? ??
• ??? DB? ??
• ??? ?????(??/??)? ??

17
?? ???? ?? ? ??

• ?????? ??

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IMS ??? ??

• ??? ?? ??? ??? ?? ??? ?? ??? ????? ??
• ????? ??? ??? ???? ?? ?? ?? ????
• ??? ?????? ??? ?? ??? DB
• ???(???, ??, ???)? ???? ?? ????? ????
• ??? ??? ????? ??? ? ?? ???? ???? ???? ????
  ??? ? ?? ??

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?? SIP ? ??
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IMS??? CSCFs
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IMS Architecture
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IMS ? NGN, BcN
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?? ??? ??? IMS ?? ??
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• NGN Functional Architecture Model

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• NGN??? IMS? xDSL?? WLAN? ?? ???? ??? access ??
  ??? ? ??? ??
• The control of access networks (QoS, admission
  control, authentication, etc.)
• The co-ordination of multiple control components
  to a single core transport for resource control
• The interworking and interoperability with legacy
  and other networks
• Mutual de-coupling of the application layer from
  the session/call control layer and the transport
  layer
• Access technology independence of session/call
  control layer and application layer.

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• Grouping of NGN Functional Entities

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Extended Services OMA

• OMA(Open Mobile Alliance)
• In June 2002, the mobile industry set up OMA
• Integrated organizations into OMA
• Location Interoperability Forum (LIF)
• SyncML Initiative
• Multimedia Messaging Interoperability Process
  (MMSIOP)
• Wireless Village
• Mobile Gaming Interoperability Forum (MGIF)
• Mobile Wireless Internet Forum (MWIF)
• OMAs Vision
• No matter what device or operating system you
  have, no matter what service you have, no matter
  what carrier you use, you can communicate, access
  and exchange information.

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IMS?? OMA ?? ???

• OMA PoC (Push-to-talk over Cellular)
• ??? ????? ?? ??? ??? OMA(Open Mobile Alliance)??
  ??? ??? ???
• ??? Access Network ??? Interoperable PoC ??? ???
  ?? ?? ??
• Open Standard PoC ???
• 3GPP/3GPP2 OMA? ??
• Base network 3GPP IMS(R6), 3GPP2 MMD
• Focus on call setup latency (SDB, Header
  compression ?)
• OMA Presence Service

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Peer-to-Peer SIP

• Two Layers
• SIP layer call processing
• P2P overlay layer location service
• P2P Overlay Layer
• Super Node (SN)
• Ordinary Node (ON)
• Authentication Server
• Bootstrap Server

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P2P SIP Architecture

• Federation of P2P SIP Networks

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So.

• VoIP cable?? NGN?? ???? ?? ????
• SIP? ???? ?? VoIP cable ?? ??????
• CMS
• ??
• DB? ??????