2006. 6. 13 숭 실 대 학 교 김 영 한 ( yhkim@dcn.ssu.ac.kr ) VoIP 서비스 도입을 위한 시스템 구축 - IMS기반 VoIP 망 구성 및 서비스 - 2006. 6. 13 숭 실 대 학 교 김 영 한 ( yhkim@dcn.ssu.ac.kr.

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Presentation transcript:

2006. 6. 13 숭 실 대 학 교 김 영 한 ( yhkim@dcn.ssu.ac.kr ) VoIP 서비스 도입을 위한 시스템 구축 - IMS기반 VoIP 망 구성 및 서비스 - 2006. 6. 13 숭 실 대 학 교 김 영 한 ( yhkim@dcn.ssu.ac.kr )

발 제 Cable network VoIP를 위한 signaling protocol 은? MGCP vs. SIP(IMS) 현 packet cable에서의 Protocol 3GPP IMS에서의 SIP NGN으로 가기 위한 IMS 기반구조

PacketCable 1.5 Architecture Framework

NCS, DQoS (Dynamic QoS)

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

MGCP (Media gateway control protocol)위치

Packet cable에서의 SIP CMSS(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

CMSS(CMS to CMS Signaling) Trusted Domain of PacketCable Service Provider

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)

PCMM Architecture

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)

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

(IP Multimedia Subsystem) 에서의 SIP 3GPP IMS (IP Multimedia Subsystem) 에서의 SIP

NGN/BcN의 방향 수평적 계층 구조 다양한 액세스 네트워크 IP 기반의 통합 네트워크 인프라 서비스, 제어, 전달, 액세스 등으로 계층화 신속, 유연한 서비스 생성 및 도입 개방형 인터페이스 구조 다양한 액세스 네트워크 다양한 액세스 네트워크 수용 액세스 네트워크간 이동성 제공 IP 기반의 통합 네트워크 인프라 음성/데이터/멀티미디어 서비스 등 모든 서비스를 통합된 패킷기반 코어망으로 전달 광대역, 고품질, 멀티미디어 전송 기술 활용 서비스 제어 및 운용관리 기능 집중화로 망구축 및 운용 효율화에 의한 비용절감

통합 서비스를 위한 망 구조

통합 서비스를 위한 망 구조 기본호/세션 제어부의 통합 가입자 DB의 통합 사용자 인터페이스(가입/청약)의 통합

통합 서비스를 위한 망 구조 세션제어부의 통합

IMS 구조의 특징 다양한 응용 서비스 제공을 위한 개방형 응용 서비스 인터페이스 제공 다양한 응용 서비스 제공을 위한 개방형 응용 서비스 인터페이스 제공 서비스간의 연동을 원활히 하게하기 위한 통합 세션 제어기능 개방형 인터페이스를 포함한 통합 가입자 DB 이동성(가입자, 단말, 서비스)을 지원하기 위한 세션제어의 분산구조 어떠한 형태의 단말에게도 지원될 수 있는 서비스에 대해서는 동일하게 서비스를 제공할 수 있는 구조

기본 SIP 망 구조

IMS에서의 CSCFs

IMS Architecture

IMS 와 NGN, BcN

주요 표준화 기관의 IMS 채택 현황

NGN Functional Architecture Model

NGN에서의 IMS는 xDSL이나 WLAN과 같은 추가적인 형태의 access 망을 지원할 수 있도록 확장 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.

Grouping of NGN Functional Entities

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) OMA’s 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.”

IMS기반 OMA 응용 서비스 OMA PoC (Push-to-talk over Cellular) 모바일 응용서비스 국제 표준화 단체인 OMA(Open Mobile Alliance)에서 표준화 활발히 진행중 다양한 Access Network 상에서 Interoperable PoC 서비스 전개을 위한 규격 개발 Open Standard PoC 서비스 3GPP/3GPP2 – OMA간 협력 Base network : 3GPP IMS(R6), 3GPP2 MMD Focus on : call setup latency (SDB, Header compression 등) OMA Presence Service

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

P2P SIP Architecture Federation of P2P SIP Networks

So…. VoIP cable망을 NGN으로 확장하기 위한 방향은? SIP를 수용하기 위한 VoIP cable 망의 요구사항은? CMS 단말 DB의 통합방안은?