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1 Pilsung AB Taegyun A Fathur AB Afif A Hari A Gary A Dhika AB April AB Mulya AB Yusuf AB Anin A Rizka B Dion AB Siska AB Mirel AB Hani AB Airita AB
2 List of countries by number of Internet users 100,00% 80,00% 60,00% 40,00% 20,00% 0,00% User : Population Source: Wikipedia
3 About SIP SIP is a IETF standard protocol for peer-to-peer signaling protocol Support HTTP and SMTP SIP components: User Agent: User Agent Client User Agent Server Server UAC SIP SERVER PROXY REDIRECT REGISTRAR LOCATION Signaling Messages Between User Agent And Server UAC UAS UAS SIP USER AGENT SIP USER AGENT
4 SIP Messages SIP has 2 types of messages: Request, sent from client to server, which contain type of operation Response, sent from server to client, which contain status information Six types of request messages: INVITE : shows an invitation to a user or service ACK : shows a confirmation from a previous invitation OPTION : used to query a server s capabilities BYE : sents by a user to terminate a communication CANCEL : used to cancel a previous request REGISTER : used to register a client in contact information
5 IP Multimedia Subsystem (IMS) Course Number : TTH2A3 CLO : 4 Week : 12
6 TCP/IP Stacks Q: What is the difference between voice and multimedia communication? Source: Wikipedia By en:user:kbrose and en:user:cburnett
7 Technology Drives Telecommunication Company s Portfolio From Circuit Switch (TDM) to Packet Switch (IP) From voice to multimedia (image, video, etc) From fixed or mobile? to fixed and mobile From telecommunication purposes to web purposes The World The World Phone Lines Population Mobile Phone Population
8 What is IMS? IMS is an architecture framework Based on SIP and IP Platform to deliver multimedia service 3GPP standard from Next Generation Wireless Network Include standard for integration to support wireless-wireline convergence
9 IMS Protocol: Signaling SIP (Session Initiation Protocol) application-layer protocol for call setup, modification, and termination of a multimedia session open standard and text-based protocol from IETF chosen for IMS for its flexibility and fast development able to communicate to all elements in IMS (CSCF, MGCF, BGCF, AS, IMS Client) Diameter application-layer protocol for AAA (Authentication, Authorization, Administration) open standard and text based protocol from IETF used for communication between HSS-CSCF and HSS-AS
10 IMS Protocol: Multimedia Data RTP (Real-time Transport Protocol) is a network protocol to deliver audio & video over IP Networks open standard from IETF
11 3GPP/TISPAN IMS Architecture
12 IMS Architecture: App and ENUM Server Application Server (AS) provides value added IMS Services DNS (Domain Name System) / ENUM (Electronic NUMber mapping) Server provides: ENUM convert Tel URI to SIP URI DNS converts NE domain name to IP Address (by querying NAPTR, SRV, and A/AAAA)
13 IMS Architecture: CSCF CSCF (Call Session Control Function) is the main element in IMS for call setup, supervise, route, integrate, and terminate multimedia session. P-CSCF (Proxy CSCF), entrance to IMS core network, works as controller for security, NAT and QoS I-CSCF (Interrogating CSCF), route signaling session to S-CSCF S-CSCF (Serving CSCF), choose which AS to serve the SIP message, and provides routing using ENUM
14 IMS Architecture: HSS, MRF, and GCF HSS (Home Subscriber Server) contain database of subscribers, such as user profile and user authorization level MRF (Media Resouce Function) provides resource to support special services, such as multi-way conference bridges, announcement playback, and media transcoding. This is done by collaboration between MRFC (Media Resource Function Control) and MRFP (Media Resource Function Processor) BGCF (Breakout Gateway Control Function) decides next hop to deliver SIP message MGCF (Media Gateway Control Function) translates protocol to control multimedia session
15 Registration Flow 1. Initial register message 2. 2 nd register message (4) Assign S-CSCF HSS-A (6) Authentication S-CSCF-A Data (13) Assign S-CSCF HSS-A (15) User profile S-CSCF-A I-CSCF-A (3) Register (5) Register (7) 401 I-CSCF-A (12) Register (14) Register (16) 200 OK P-CSCF-A (8) 401 DNS P-CSCF-A (17) 200 OK DNS (1) Register (9) 401 (2) DNS query (10) Register (18) 200 OK (11) DNS query UE UE
16 Session Establishment for PSTN and PLMN IMS User Initial Call to PSTN/PLMN User PSTN/PLMN User Initial Call to IMS User
17 MSS Mobile Soft Switch
18 Mobile Network Topology Source: Wikipedia By Tsaitgaist - original from User:Cvaldaredesigned
19 Circuit Switch vs. Mobile Soft Swicth MSC Classic MSC (Control and Switching) MSC-S MSC Server (Control) MGw Mobile Media Gateway (Switching) Classic circuit-switched network Layered Architecture network MSC-S Control Layer MSC MGw Connectivity Layer MSC MSC MGw IP MGw TDM MSC MSC MGw MGw
20 Mobile Soft Switch Layered Architecture MSC and Media Gateway Non Layered Architecture Layered Architecture Control Plane ATM TDM IP MSC/VLR MSC/MGW TDM GSM UMTS Control Plane ATM TDM IP MSC server UMTS Gateway Control GSM User Plane (payload) MGW ATM IP TDM User Plane (payload)
21 MSS Benefits Each layer can grow independently ƒ Control Centralised location of servers reduces O&M cost Independent of transport technology ƒ Connectivity Same transport for all services Free choice of transmission technology Distributed MGWs enables transmission and interconnection charges savings Enables transport of coded voice MSC-S SGSN End-user applications HLR Control Connectivity GMSC/Transit GGSN WCDMA Access M-MGW GSM/ EDGE Access M-MGW SG PSTN ISDN Internet Intranet
22 MSS Benefits ƒ ƒ M:N relations for MSC-S and MGW Optimal and efficient investments (CAPEX) due to independence the layers from each other Resource dimensioning for Servers or for MGws Choice of transport technologies (TDM, ATM, IP) of MSC server UMTS GSM MSC server UMTS GSM MSC server UMTS GSM MGW ATM IP TDM MGW ATM IP TDM MGW ATM IP TDM MGW ATM IP TDM MGW ATM IP TDM
23 Signaling in PLMN Existing: Layering:
24 Signaling in PLMN (Layered Architecture): GCP (H.248)
25 Signaling in PLMN (Layered Architecture): BICC
26 Signaling in PLMN (Layered Architecture): Bearer Control
27 MSAN Multi Service Access Node
28 Topology > 3 km MSAN IP Network fiber optic
29 Typical Wire Line Access (Previous) Configuration Access Network QE MDF SC SC = Street Cabinet MDF = Main Distribution Frame
30 Wire Line Access Configuration: Enhancement 1 Insert Node R-DSLAM IP network R-DSLAM SC MDF POOR, >3 4 KM RDSLAM = Remote DSLAM (Digital Subscriber Line Access Multiplexer)
31 IP network Wire Line Access Configuration: Enhancement 2 Insert Node R-DSLAM V5.2 COT ROT SC R-DSLAM DDF IP DSLAM MDF tie line X
32 APP SERVER Wire Line Access Configuration: Final Phase Media GW / MSAN SGW Media GW / SSW DDF MSAN IP network
33 See you on other classes
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