KRnet2004 BcN Service Model 2004.06.25( 금 ) BcN 응용연구팀황진경 (jkhwang@kt.co.kr) 서비스개발연구소
목 차 I. BcN 서비스환경 II. BcN 서비스구조표준동향 III. BcN 서비스모델 IV. 서비스브로커모델 V. 맺음말 2/52
I. BcN 서비스환경 1. 한국 BcN서비스비전 2. 각국의 NGN서비스비전 3. Some keywords 3/52
I. BcN 서비스환경 1. 한국 BcN 서비스비전 BcN 비전 ( 광대역통합망구축기본계획, 2003.10 정통부 ) 디지털기술, 컴퓨팅파워, 네트워크기술의획기적발전 ( 통신, 방송, 인터넷의혁명적대통합 ) 여가시간의확대, 삶의질추구 ( 인간중심의유비퀴터스정보환경 ) 누구나원하는고품질의정보서비스를언제든지자유롭게 ( 지식정보화의전면화 ) 정부부문 공공 DB 정보통합 물류 / 유통 기업부문 On LINE - 공공조달 전자정부 디지털콘텐츠 통신 SoC 방송 원격회의지능형로봇 금융 전자투표 Post PC 광대역통합망 이동통신 BSS 동영상화면전송 지능형홈네트워크 인터넷 텔레매틱스 가상현실 원격교육 DTV 내장형 S/W 전자상거래 교통 환경 / 의료 가정 재택근무 4/52 사회부문 KT서비스개발연구소
I. BcN 서비스환경 NTT - NGN 에서기대되는네트워크서비스인터랙티브통신, 비디오전달, VPN, 홈 ubiquitous 서비스 2. 각국의 NGN 서비스비전 ITU-T NGN Workshop 2003 Interactive end-to-end communication services Diversification in service features, such as security, service level guarantees, and presence information. Penetration of easy-to-use terminals is a key issue. New means of communication that will replace telephony in the future. Video delivery services Appropriate business models are being explored which take account of copyright issues. Amid the convergence between telecommunications and broadcasting, and in light of the soon-to-start digital terrestrial b/c, the b/c industry is highly interested. Potential demand is certain. Virtual Private Network (VPN) services The diversification of means of network access, and the need for flexible network configuration have made highly value-added VPN a key to differentiation. Information home appliance control services Widespread use of cellular phones and PDAs allows users to be always connected. Initial targets are remote control of home appliances and home security services Future targets include diverse services using RFID tags and various sensors. 5/52
I. BcN 서비스환경 NEC 다이나믹협업서비스 파트너기업간유연한협업서비스 Multivendor Support for Customer System 24 hours, 365 days system support and on-demand bandwidth utilization Remote conference system with tele-existence/virtual reality capability Development partner Next Generation Management Style 2. 각국의 NGN 서비스비전 ITU-T NGN Workshop 2003 Customers Self-support of all functions Joint productization, Technology sharing Enterprise A Joint productization Outsourcing Core competence (R&D,Planning,, Production) Realtime info. sharing, Inventory management Realtime Info. sharing Order management Logistics partner Business function outsourcing Sales partner 6/52
I. BcN 서비스환경 NEC 홈제어및보안 가정부로봇을통한홈제어 2. 각국의 NGN 서비스비전 ITU-T NGN Workshop 2003 Robot-type Home server User controls robot from outside through the Internet The robot controls home appliances with IrDA, RFID, etc. The robot automatically acts in accordance with user s presence Light HDTV and HD Video recorder ( 예 ) 여행중이나집에돌아오는길에, 문이잠겼는지확인 애완동물및정원이잘보존되는지감시 자동비디오녹화 집가까이도착하면집안전등이자동켜짐 Maid robot Door lock and door phone Internet Feeding Warming bath 7/52
I. BcN 서비스환경 BT NGN 신규서비스 멀티미디어통화, 방송, 게임, 보안, 텔레워킹 Multimedia calling (SIP) 2. 각국의 NGN 서비스비전 ITU-T NGN Workshop 2003 Video Downloads VoIP, video,instant messaging, photos, movies,sharing, games Broadcast TV 4.7Gbyte DVD can be stored on CD Could be streamed (nrt) in ~3 hours Microsoft XBox will become a STB Digital Rights Management? Gaming Wholesale Broadcast TV distribution service Only available to BB Customers Biplay service (or tri-play) Services integrated by CPE (or by SP) Teleworking Low latency downloading QOS management Security Virus scanning Firewalls Back-up Encryption Remote LAN access Security / encryption Roaming 8/52
I. BcN 서비스환경 3. Some Keywords BcN 서비스환경에서핵심기능 Interactive End-to-End QoS services Various service features such as security, service level guarantees, and presence information. Interactive Multimedia Delivery services Convergence between telecommunications and broadcasting Virtual Private Network (VPN) services Diversification of network access Flexible network configuration for highly value-added VPN Home Network and End-User Ubiquitous Services Widespread use of cellular phones and PDAs Remote control of home appliances and home security services Diverse services using RFID tags 최준균, ICU 2004.6 9/52
I. BcN 서비스환경 3. Some Keywords Service Sets Interoperability with PSTN/ISDN Telephony Voice Services Multimedia Services Conferencing & Multiparty services Streaming Services Non voice services Internet Access NGN Service Requirement, ETSI TISPAN_NGN 10/52
II. NGN 서비스구조표준동향 1. NGN 관련표준단체 2. ETSI TISPAN_NGN 3. 3GPP IMS 4. ITU-T SG11 5. ITU-T SG13 11/52
II. NGN 서비스구조표준동향 1. NGN 관련표준단체 NGN 관련표준단체 Organization ITU-T ETSI (TISPAN) IETF 3GPP, 3GPP2 TM Forum DSL Forum TIA, OIF IEEE MSF OMG Technical area/topic Network implementation guideline and standard Telecom, Access network IP Network, Optical transport network Telecom, Wireless network Telecom Management Access network Optical networks & technology Wired and Wireless Ethernet Multiservice switching Forum Object Management 12/52
II. NGN 서비스구조표준동향 2. ETSI TISPAN ETSI TISPAN_NGN (Telecomm. and Internet converged Services and Protocols for Advanced Networking) 통신서비스 : 대화 ( 통화 ) 형, 메시지형 컨텐츠온디맨드 : 데이터검색형, 스트림형, 방송형, 데이터서비스형 Person-to-Person Communication Services Conversational Voice call Video call Chat call Multimedia call Messaging Content-on-demand e-mail SMS Browsing Download Streaming Push Broadcast Peer-to-Peer 13/52 EMS MMS IM
II. NGN 서비스구조표준동향 2. ETSI TISPAN ETSI TISPAN_NGN Architecture discussion basis ( 유무선 ) NGN 을위해 3GPP IMS core 외에데이터형서비스및기존망서비스를위한서브시스템을포함 Applications Based on 3GPP IMS R6 xdsl Connectivity Access Network Access Network Attachment Subsystem Other Multimedia Subsystems (RTSP -based) Streaming services (SIP-based) IP Multimedia Subsystem (Core IMS ) ISC Dh, Sh Gm Gq Resource Control Subsystem SIP-I based PSTN/ISDN emulation Subsystem Mn P S T N Access Transport Network Core Transport Network IP 14/52
II. NGN 서비스구조표준동향 Sh AS SCIM AS SIP SIP Application Application Server Server ISC 3. 3GPP IMS IP Multimedia Subsystem (IMS) 에서서비스제공구조 (IM Call Model 3GPP TS 23.218) SIP AS, OSA 응용및기존지능망구조를포함 호제어응용관점 AS : Application Server SCIM : Service Capability Interaction Manager HSS: Home Subscriber Server S-CSCF: Serving Call Session Control Function IM-SSF: IP Multimedia Service Switching Function CAMEL : Customized Applications for Mobile network Enhanced Logic MRFC : Media Resource Function Controller OSA : Open Service Access HSS Si Cx S-CSCF ISC ISC OSA OSA service service capability server server (SCS) (SCS) Mr OSA OSA application server server OSA API MAP IM-SSF CAP MRFC Behaves as SIP application servers on ISC interface Camel Camel Service Service Environment 15/52
II. NGN 서비스구조표준동향 3. 3GPP IMS Application Triggering Architecture Application Server Service Logic Service Platform Trigger Points HSS SIP Interface 가입자 REGISTER 시프로파일다운로드 ifc sfc SIP S - CSCF SIP S P T Filter Criteria SIP 16/52 HSS: Home Subscriber Server S-CSCF: Serving Call Session Control Function SPT: Service Point Trigger ifc: initial Filter Criteria sfc: subsequent Filter Criteria
II. NGN 서비스구조표준동향 3. 3GPP IMS Application Triggering Architecture (CSCF 관점 ) Service Point Triggers (SPT): 필터기준 (FC) 이설정되는 SIP 신호지점 SIP method 에따른트리거 : REGISTER, INVITE, SUBSCRIBE, MESSAGE 특정 header 필드의존재유무에따른트리거 서비스가입자에여부에따른트리거 : 예 ) ( 이동 ) 발신, 착신가입자 Filter Criteria (FC): 서비스요청시 SPT 를해당응용서버로트리거 가입자프로파일 (Application Server Subscription Information) 에저장 포함정보 : 응용서버주소, FC 우선순위, 디폴트처리방법, 인증데이터, ( 서비스정보 ) S-CSCF 내처리순서 (1) 우선순위에따라 FC 리스트설정 (2) Request 메시지를파싱하여해당 SPT 를검출 (3) FC 에따른다음우선순위의트리거포인트여부를체크 (3-1) 만족하는것이없다면 (4) 로진행 (3-2) 현 FC 에따라해당 AS 로 request 를전달 ; AS 는서비스로직을수행하고결과로요청을 S-CSCF 로전달 (3-3) AS 로부터요청을다시수신했다면 (4) 로진행 (4) 마지막 FC 를만날때까지다음 FC 에따라위 (2),(3) 을반복. (5) 정상 SIP 라우팅동작에따라 request 를전달 17/52
II. NGN 서비스구조표준동향 3. 3GPP IMS Application Triggering Architecture (AS 관점 ) Service Platform Trigger points (STP) 응용서버로하여서비스로직을트리거하도록하는 SIP 신호상의지점 Service Key 응용서버가적용할서비스로직을식별하는값 Service Script 응용서버가호처리를하기위한스크립트 ( 예 : CGI, CPL, Java Servlet, 기타프로그램언어 ) 18/52
II. NGN 서비스구조표준동향 응용서버와 CSCF 간동작모델 착신 UA 및 Redirect Server 모드 ( 예 ) 단순번호번역 (LNP, FP, SN, PN 서비스등 ) SIP dialog 1 (From: X, To: Y, Call-ID:Z) AS SSW SIP dialog 1 (From: X, To: Y, Call-ID:Z) Proxy server 모드 ( 예 ) ( 착신주소변경 ) 호전환 SSW SIP dialog 1 (From: X, To: Y, Call-ID:Z) SIP dialog 1 (From: X, To: Y, Call-ID:Z) 3. 3GPP IMS 발신 UA 모드 ( 예 ) Alarm Call, Click-to-Talk AS 3PCC/B2BUA 모드 ( 예 ) Prepaid, follow-on, mid-call 처리. SIP dialog 1 (From: X, To: Y, Call-ID:Z) SIP dialog 1 (From: X, To: Y, Call-ID:Z) AS SSW SIP dialog 1 (From: X, To: Y, Call-ID:Z) SIP dialog 1 (From: X, To: Y, Call-ID:Z) 19/52 SIP dialog 1 (From: X, To: Y, Call-ID:Z) SIP dialog 1 (From: X, To: Y, Call-ID:Z) AS SSW SIP dialog 2 (From: L, To: M, Call-ID:N) SIP dialog 2 (From: L, To: M, Call-ID:N) KT서비스개발연구소
II. NGN 서비스구조표준동향 Service control architecture 4. ITU-T SG11 (SIP-based Service Triggering and Service Interactions ITU-T SG11 TD26-GEN, 2004.3) Trigger Data Repository Application Server -Global Trigger 데이터는 initial request 나부팅시다운로드 -User-based Trigger 데이터는 REGISTER 시다운로드 SIP Services Access Manager SIP Cache SIP Signalling Entity SIP Call Server 20/52
II. NGN 서비스구조표준동향 4. ITU-T SG11 Service control architecture SIP Call Server Service Access Manager : 서비스로직이 ( 요청 ) 세션에관련될시점을결정하고관련사건을보고처리 SIP Signaling Entity: SIP 신호처리부. SIP proxy, UA, Redirect server, B2BUA 일수있다. SIP Application Server: 서비스로직프로그램인스턴스를실행하고 SiP Call Server 와 SIP 를통해상호작용하는망실체. SIP AS 는 UA, redirect server, proxy 나 B2BUA 일수있다. Service Logic Program : 서비스로직을포함하는소프트웨어프로그램 Trigger Data Repository: SIP call server 내트리거및이벤트처리를위해사용하는트리거데이터를저장 트리거데이터 트리거기준 : 특정헤더필드존재유무또는내용, 특정 body 타입존재여부 우선순위지시자, Compatibility ( 서비스가포함되는서비스클래스분류 ), 응용서버주소, 서비스키, 디폴트처리, 서비스정보, Method 특정데이터 (Request Privacy Mask, Request Write Permission, Response Privacy Mask, Response Write Permission): 요청 / 응답을전달할때제거해야만하는 (privacy mask) 혹은수정이가능한 (write permission) 21/52
II. NGN 서비스구조표준동향 4. ITU-T SG11 Linked Dialogue 예 Initial request 가이전요청과관련 (linked) 되었는지여부를, 이전요청의 Route header 내 correlation token 을체크하여검토 Correlation Token: 두개의 SIP initial request (( 서로다른 ) 두다이얼로그 ) 간의관련성 (correlation) 을구분가능하게하는 SIP URI 내삽입된유일한식별자 SIP Linked Initial Request: 동일한 correlation token 을포함하는 SIP initial requests 집합 SIP Linked Dialogue: initial request 가서로링크된 SIP 다이얼로그집합 INVITE Route: URI AS Route: URI CS with Token From: a To: b Call-Id: x Application Server INVITE Route: URI CS with Token From: a To: c Call-Id: y INVITE Route: URI CS From: a To: b Call-Id: x Call Server INVITE From: a To: c Call-Id: y 22/52
II. NGN 서비스구조표준동향 4. ITU-T SG11 SIP Call server with trigger processing without abstract call model SIN(SIP-IN), OSA/Parlay, Full SIP 을포함한구조 Service Logic Program Service Execution Environment S C F Service Logic Program Service Execution Environment Service Logic Program Service Execution Environment INAP OSA/Parlay Services Access Manager A S Services Access Manager Service Execution Environment Services Access Manager OSA Gateway SIP Signalling Event Abstract Call State Machine Abstract Call State Machine SIP Signalling Entity SIP Signalling Entity SIP SIP SIP Signalling Entity Services Access Manager SIP Signalling Entity SIP Abstract call state machine 이없는 Call server: call signaling interception 및프록싱에의해 AS 와상호작용 Baseline text for TR on NGN Service Control Architecture KRnet2004 (FT, TD-27, (06.21-25) SG11, 2004.03) 23/52
II. NGN 서비스구조표준동향 4. ITU-T SG11 관련요소 Abstract Call State Machine: 신호절차의추상화된모델로, 서비스로직이이를근거로호처리진행 호모델예 : IN BCSM, OSA MPCC, JAIN JCC Service Access Manager: 서비스로직이 ( 요청 ) 세션에관련될시점을결정하고관련사건을보고처리 서비스인터랙션을처리하는절차를포함 Service Execution Environment: 서비스로직프로그램인스턴스실행을가능하게하는소프트웨어환경 SIP call server: SIP 신호사건에근거해서호상태를유지 SIP signaling entity와 service access manager를포함 24/52
II. NGN 서비스구조표준동향 5. ITU-T SG13 (JRG-NGN) ITU-T SG13 JRG-NGN [7] Functional Architecture Application Gateway Function Application Server Function (may include own Authentication, Authorization and Accounting) CDR Application Terminal Function CDR CDR User Control Proxy Function Charging Collection Function (CCF) User DB Function CDR Session/Control Function Media Resource Control Function Transport Adaptation Transport Resource / Policy Control Function Authentication & Authorization Function Registration Function CDR MGCF CDR PGCF STGF Session & Call Control NMS EMS Proxy Function Access Relay Function Authentication & Authorization Function Network Access Control Function Network Access Process Function Mobility Support Function Transport Resource & Enforcement Functions Traffic Measurement Function CDR Media Resource Processing Function CCF PGF IP Connectivity Transport Management AMGF Packet Transport Function MGF Scope of NGN All lines of this type attach to the corresponding input line at the CCF within session & call control Connection point 25/52 Core transport network functionality Functionality may be instantiated in core and / or access transport network
II. NGN 서비스구조표준동향 5. ITU-T SG13 (JRG-NGN) CMPF Management Plane ITU-T SG13 (NGN-JRG, NGN-WD-46 (2004.01)) [8] 초안수준의상세기능구조제안 응용계층에 CSF(Content Server Func), ASF(Application Server Func), ASGF(Application Server Gateway Func) 을포함 UPDF User Session Layer Interface ARF UPSF ACF APF To Other LSF To Other TRCF REGF LSF UCPF TRCF TPEF CSF SCPF MRCF MRF ASF BGCF PIMGF To Other AS provider ASGF To Other SCPF MGCF AMGF SGF TMGF u Application Server Functional Entity (ASF): provides service performance environments, provide services, and can be hosted by third parties. u Application Server Gateway Functional Entity (ASGF): provides open interface (etc. API) towards third party application service providers. u Content Server Functional Entity (CSF): has responsibility for the providing of content. u Service Control Proxy Functional Entity (SCPF): handles service logical control, session setup, modification and teardown. This includes service triggering, generation of charging records, etc and interaction with authentication and registration functions. 26/52
III. BcN 서비스모델 1. BcN 서비스개념 2. BcN 서비스분류 3. BcN 서비스망구조 4. 복합형서비스개념모델 5. 복합형서비스예 27/52
III. BcN 서비스모델 1. BcN 서비스개념 기존망서비스를심리스하게수용통합망인프라상에서통합형응용서비스고객니즈형멀티미디어서비스표준프로토콜 / 개방형 API기반다양한서비스환경 표준인터페이스기반 BcN 구조및계층별서비스 응용플랫폼 통화 + 데이터응용서비스 유무선컨텐츠응용서비스 통신 + 방송응용서비스 표준프로토콜및인터페이스 기본 / 부가통신서비스제어플랫폼 기본데이터서비스 응용및제어플랫폼 단일패킷전달망 다중접속망 28/52
III. BcN 서비스모델 2. BcN 서비스분류 제어유형별분류 (BcN 표준모델 ) 구분 분류 서비스예 BISDN 분류 (I.211) 통화기반 멀티미디어통화 (video,audio,text) 컨퍼런스 음성및영상통화 음성및영상컨퍼런스 conversational conversational 메시징 VMS, UMS messaging 데이터검색 웹, 멀티미디어정보검색 retrieval 데이터응용 게임 conversational 데이터기반 스트리밍 뮤직비디오 conversational 즉시형메시징 IM, SMS, MMS messaging 비즉시형메시징 email messaging 아날로그 기존 TV 방송 distribution 방송기반 디지털 DTV, 디지털오디오, On-Demand (VOD) distribution 데이터 프로그램종속형, 프로그램독립형 distribution 홈기반 홈 -GW 기반서비스 (video,audio,text) 원격검침, 원격교육 conversational, retrieval,distribution 29/52
III. BcN 서비스모델 2. BcN 서비스분류 유형별제어구조 (1/3) 통화기반 Session Controller BcN 이용자단말간및 BcN 이용자단말과서버간통화로설정을통하여, 음성, 텍스트, 영상, 화상을통하여통신하는서비스 - 세션제어구조를통해 -Session Controller 예 : 소프트스위치, 응용서버 멀티미디어통화 Session Controller Session Controller 컨퍼런스 통화기반메시징 메시징서버 30/52
III. BcN 서비스모델 2. BcN 서비스분류 유형별제어구조 (2/3) 데이터기반 Data Service Server (Info) e.g. HTTP, FTP client BcN 단말과데이터서버간데이터세션을통하여멀티미디어데이터를송수신하는서비스 - 클라이언트 - 서버구조를통해 -Data service server 예 : 데이터제어응용서버 데이터검색 Streaming Server e.g. RTSP client Data Service Server e.g. TCP/IP client e.g. SIP Messaging (Store-and-forward) 스트리밍데이터응용메시징 31/52
III. BcN 서비스모델 2. BcN 서비스분류 유형별제어구조 (3/3) 방송기반 e.g. TCP/IP Headend & control platform. Broadcast Application Server BcN 방송단말 (setop-tv,ip 단말 ) 과 방송응용서버간제어를통하여 방송을제공하는서비스 - 방송제어구조를통해 - Broadcast AS 예 : content server of CP 홈기반 Home Application Server e.g. OSGi, UPnP HGW BcN홈GW 및그에수용된단말들과홈응용서버간제어를통하여제공하는서비스 - 홈GW제어구조를통해 - Home AS예 : 원격제어서버 32/52
III. BcN 서비스모델 서비스관점망구조 3 rd party 응용서버.. 3 rd party 컨텐츠서버 3. BcN 서비스구조.. 서비스계층 개방형 GW 통화응용서버 미디어서버 스트리밍서버 데이터제어응용서버 메시징프레젠스 / 서버로케이션 방송응용서버 홈응용서버 서비스브로커 제어계층 소프트스위치 ( 멀티미디어호처리 ) 엣지서비스 PoP ( 인증, 접속제어 ) 방송제어 홈제어 전달계층 전달계층 접속 / 홈계층 접속 / 홈계층 33/52
III. BcN 서비스모델 4. 복합형서비스개념모델 BcN 복합형서비스 통화기반복합서비스 : 멀티미디어통신 ( 통화 + 메시징 ) ( 음성 / 데이터통합형 ) 데이터기반복합서비스 : 데이터기반응용서비스 ( 통신 / 방송복합형 ) 컨텐츠호스팅서비스 : 3rd party 의풍부한컨텐츠를수용한서비스 ( 유무선통합컨텐츠형 ) 통화 / 컨텐츠복합 컨텐츠기반 단순검색 ( 날씨 / 주식 / 건강 ) 데이터 / 컨텐츠복합 통화기반 AS기반응용통화 (MMRB, MMCID) 통화기반컨텐츠 ( 멀티미디어 700 E-learning) SSW 기본 / 부가통화 AS 기반응용통화 ( 메시징 ) 비디오뱅킹 방송 /VoD 데이터기반 게임 / 홈시큐어 / 헬스케어 commerce 통화 / 데이터통합 POTS 단말 영상단말 홈게이트웨이 휴대폰 34/52
III. BcN 서비스모델 5. 복합형서비스예 통화 + 데이터복합서비스예 = 멀티미디어통신 ( 통화 + 메시징 ) 프레즌스서버 BcN 단말을통해통화및메시징을동일환경에서사용 주요기능 BcN AS SIP 메시징서버 프레즌스기반멀티미디어통화기능 프레즌스기반메시징기능 SIP 동일주소록및메시징관리 통화중및비통화중메시징기능 SSW BcN BcN Messaging server BcN 단말 BcN 단말 Session Controller client client 통화기반 + 데이터기반제어구조 35/52
III. BcN 서비스모델 5. 복합형서비스예 통화 + 컨텐츠통합서비스예 = 멀티미디어발신자정보제공서비스 BcN 가입자에게전화를걸었을때, 착신자에게벨소리대신발신자가설정해놓은멀티미디어발신자정보 ( 명함 ) 를착신자에게제공 BcN AS 컨텐츠웹서버 주요기능 SIP SIP 멀티미디어발신자정보제공기능 ( 명함, 사진, 아바타, 동영상, 텍스트등 ) 맞춤형멀티미디어발신자정보제작기능 맞춤형멀티미디어발신자정보설정기능 ( 일시별, 발신자별, 단말능력별등 ) SSW BcN BcN MS 멀티미디어발신자정보컨텐츠 멀티미디어발신자정보표시 / 거부기능 김하늘 Contents Server BcN 영상단말 ( 발신자 : 김하늘 ) BcN 영상단말 Session Controller client client 통화기반제어구조 + 컨텐츠 36/52
IV. 서비스브로커모델 1. 서비스브로커기능정의 2. 산업표준에서서비스브로커위치 3. 업체동향 4. 서비스브로커구조 5. 서비스브로커기능 6. 서비스브로커제어모델 7. 서비스브로커동작예 37/52
IV. 서비스브로커모델 1. 서비스브로커정의 MSF 의정의 (msf-tr-arch-002-final) [9] :SCF (Service Coordination Function, 서비스중재기능 ) 멀티미디어, 멀티서비스환경에서다중사업자도메인상의다중서비스들을통합하여고객을위해관리해주는기능을제공. 한호에대해, 다중응용이협업하여제공가능하도록하는 orchestration 기능 기존의유사한개념 SSF (Service Switching Function, 서비스교환기능 ) (IN, Q.1224) 호제어기능 (CCF) 과관련되어존재하며, CCF 및서비스제어기능 (SCF) 과의상호작용을위해서요구되는기능의집합 Parlay Framework (ETSI ES 202 OSA) Parlay 응용으로하여망의능력서버 (SCS) 를사용하도록인증하고, 발견해주는기능 SCF 기능 (MSF R2) 다중서비스 (SLF) 들이공존하여효과적이고순서적으로수행되도록하는, 구조화된상호동작 (interoperation/cooperation) 기능 각 customer entity 들에대해다중의서비스들이상호동작하도록중재 네트웍사건메시지수신시서비스별우선순위조정 다중서비스들의 cooperative, intelligent interworking 을중재 서비스로부터의 / 으로가는메시지분배상태를관리 서비스프로파일과가입자서비스간의실시간 correlation 계약된사용의보장, AS-SB 간규칙 / 데이터정책 38/52
IV. 서비스브로커모델 1. 서비스브로커정의 Service Co-ordination Function in MSF release 2 architecture. 39/52
IV. 서비스브로커모델 2. 산업표준에서서비스브로커위치 3GPP IMS 에서서비스브로커유사기능계층 Application Layer OSA AS OSA APIs SIP AS SIP CSE CAP 서비스교환 / 중재기능 OSA SCS SCIM IM SSF SIP MGCF MG UE1 S-CSCF NGN (TS 23.218(v5.2.0, 2002-09)) 09)) MRF UE2 40/52 OSA AS: Open Service Access Application Server SCS : Service Capability Server SCIM : Service Capability Interaction Manager CSE : CAMEL Service Environment IM-SSF: IP Multimedia Service Switching Function CAP : CAMLE Application Part S-CSCF: Serving Call Session Control Function MGCF : Media Gateway Control Protocol MG : Media Gateway MRF : Media Resource Function UE : User Equipment
IV. 서비스브로커모델 2. 산업표준에서서비스브로커위치 Network Capability Gateway in 3GPP2 41/52
IV. 서비스브로커모델 CSCF in 3GPP B2BUA 2. 산업표준에서서비스브로커위치 [9] 42/52
IV. 서비스브로커모델 3. 업체동향 ALCATEL 8603 PSE & Service Broker Leapstone CCE Service Broker dynamicsoft Event Manager 43/52
IV. 서비스브로커모델 4. 서비스브로커구조 [10] SIF (Service Information Function) SLF (Service Logic Function) SCF: Service Coordination Function NSICF: Network Service Instance Control Function NECF: Network Edge Control Function BCF: Bearer Control Function LMEF: Logical Media Endpoint Function LPF: Logical Port Function VSCF: Virtual Switch Control Function 44/52
IV. 서비스브로커모델 소프트스위치에포함된형태 4. 서비스브로커구조 [10] Stand-Alone 형태 응용서버에포함된형태 45/52
IV. 서비스브로커모델 서비스브로커기능 우선순위제어 (Priority Resolution) 충돌제어 (Conflict Resolution) 응용서비스실패시처리 (Application Failure Handling) Continue Terminate Network Announcement Failure detection through no response Single retry after 500ms for Optional Applications Two retries 500ms and 1500ms for Mandatory Applications 응용서비스클래스 0 Redirection ( 예 : 080) 1 Basic Call Control ( 예 : Centrex) 2 Multi-Party Call Control ( 예 : 컨퍼런스 ) 3 Referral ( 예 : 호전달 ) 4 User Interaction ( 예 : 미디어서버관련 ) 5 Event Notification ( 예 : 프레젠스,location) 6 Media Terminating ( 예 : 서비스노드 ) 7 - Call Originating ( 예 : click to dial) 5. 서비스브로커기능 [11] 46/52
IV. 서비스브로커모델 호시도시서비스호출 6. 서비스브로커제어모델 [11] 통화중시서비스호출 47/52
IV. 서비스브로커모델 무응답시서비스호출 6. 서비스브로커제어모델 [11] 호종료시서비스호출 48/52
IV. 서비스브로커모델 Dial-In 컨퍼런스 6. 서비스브로커제어모델 [11] 49/52
IV. 서비스브로커모델 7. 서비스브로커동작예 착신호시, 호스크린 & 음성사서함서비스 Application Servers VM FM DND PS OrigSvc (6) (3) (5) (1) (2) Service Broker (4) SIP proxy Media server (7) (1) 발신자가호시도 (2) 착신이호스크린 & VM서비스가입자임을판단 (3) 호스크린서비스로트리거 (4) 착신호전달 (5) 착신통화중 (6) 음성사서함서비스로트리거 (7) 미디어서버연결및음성저장 50/52
V. 맺음말 BcN 광대역통합네트워크에서통합형서비스비전 키워드 : interactive multimedia, content-delivery, personalized, home, ubiquitous BcN 서비스분류및복합형서비스모델을제시 retrospect 기존 B-ISDN 분류 NGN 관련국제표준은초기단계이나본격적인시작 지능망호모델개념확장 서비스브로커기술을통한유연하고다양한서비스제공가능 호제어모델 (call state model) 에서서비스제어모델 (service state model) 로의진일보한구조제공 51/52
참고문헌 [1] 광대역통합망구축기본계획, 2003.10 정통부 [2] ITU-T NGN Workshop 2003 [3] NGN Service Requirement, ETSI TISPAN_NGN, 2004 [4] Alain Le Roux (FT), Directions for TISPAN_NGN Project, GA43(04)24, 30-31 March 2004 [5] IM Call Model 3GPP TS 23.218 [6] SIP-based Service Triggering and Service Interactions, ITU-T SG11 TD26-GEN, 2004.3 [7] Proposal for the structure of functional architecture in Y.NGN-FRA, NGN-WD, JRG-3rd Meeting,. ITU-T SG13 [8] Huawei Tech. Proposal for the Y.NGN-FRA, ITU-T SG13, NGN-WD-46, 2004.01 [9] MSF R2 Service Architecture, MSF-TR-ARCH-002-FINAL, June 2003, www.msforum.org [10] Service Solutions in NGN, MSF-TR-ARCH-003-FINAL, April 2003, www.msforum.org [11] Draft IA for SIP interface between Service Broker and Application Server, MSF2003.063, SIP IA SB-AS 52/52