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VOLTE IMS, Các liên kết, các giao diện và các stack giao thức, tài liệu mô tả các sơ đồ, các giao diện giao thức IMS, chức năng các giao thức SIP và Diameter, tài liệu được các chuyên gia Vikas Shokeen đến từ telecomtutorial biên soạn đưới sạng slide
Sh Gy Ro Gx Cx Ici SIP Rx UT IMS Sv LTE Mr Mj Mi Mg ISC Mw http://TelecomTutorial.info LTE / VoLTE IMS Protocols Interfaces LTE (4G) Network LTE User Plane IMS Network LTE Control Plane IMS User Plane PSTN / Voice Network RTP IMS Control Plane Diameter Ex : S1 , S5, SGi Ex : S1 , S10 , S11 , S6 Ex : Gm , SIP , Izi Ex : Sh , Ro , Cx , Rx , Sv , ISC , Mw , Mg , Mi SIP / SDP IP Layer MAC / Data Link Layer Physical / Ethernet IMS Protocol Stack LTE Protocol Stack UDP , TCP , SCTP http://TelecomTutorial.info SCTP Vs UDP SCTP ( Stream Control Transmission Protocol ) • • • • Requires Strong / Robust Media connectivity Provides Super Reliable Communication Connection-oriented protocol similar to TCP Provides facilities such as multi-streaming and multi-homing • Better performance and redundancy • S1AP , X2AP , Diameter ( S6 , Gx , Gy ) • Best Suited for Control Plane & Close Reliable Network such as Billing , Charging & Authentications UDP ( User Datagram Protocol ) • Suited for Non-Reliable Media • Does not guarantee that Data in the order on receive • Minimal message-oriented transport layer protocol • Enables two hosts to connect and send short messages to one another • User Plane : S1U , GTPv1U ( S5 , S8 ) • Control Plane : GTPv2C ( S5 , S8 ) • Best Suited for Long Distance & Open Networks such as Roaming etc http://TelecomTutorial.info LTE / IMS Protocols Interfaces LTE (4G) Network LTE User Plane • • • S1U S5/S8 SGi LTE Control Plane • • • • • • • • • S1MME S5/S8 S10 S11 S6a Gx Gy X2 SGs GTPv2C , GTPv1U , S1AP , Diameter , SGi AP (X2AP , SGSAP , S1AP ) PSTN / Voice Network IMS Network IMS User Plane • • • Gm SIP Izi RTP , RTCP • BICC • ISUP • SIP-I IMS Control Plane • • • • • • • • • • • • • Sh Ro Cx Rx Sv ISC Mw Mg Mi Mj Mr / Mr‘ UT Ici SIP & SDP , HTTP , Diameter , Megaco http://TelecomTutorial.info VoLTE IMS Connectivity Overview DIAMETER WORLD IMS Core HSS SIP WORLD MME SGw LTE Network OCS PGw PCRF IMS Network Voice Network Diameter , Control Plane SIP Protocol , Control Plane User Plane http://TelecomTutorial.info SIP & Diameter Protocols SIP ( Session Initiated Protocol ) • Used for Controlling Voice / Multimedia Calls & Uses RTP / RTCP for media plane • SIP manages set-up/establishing, tying together, and tear-down/ terminating of multimedia communications • Functions of SIP :- a) User Location b) User Availability c) User Capabilities d) Session Setup e) Session Management Diameter • Evolution of RADIUS (AAA) Protocol Authentication, authorization, and accounting (AAA) services • Reliable & Secure ( Runs on TCP / SCTP ) • Supports Failover mechanism to maintain redundancy • Support for Proxy & Relay Agents • Support for Capability Negotiation via Mandatory / Optional AVPs • Provides Dynamic discovery of Peers http://TelecomTutorial.info LTE Network – Protocols & Links LTE User Plane • • • S1U S5/S8 SGi MME SGw LTE Control Plane • • • • • • • • • S1MME S5/S8 S10 S11 S6a Gx Gy X2 SGs IMS Network PGw Internet LTE Network • MME is only control Plane • SGW / PGW is handling Media Voice Network http://TelecomTutorial.info S6a – LTE Protocols & Links S6 Interface ( MME to HSS ) • Diameter Link connects MME to HSS • Used for :• • DIAMETER MME S6 SGw Authentication of User Download User Profile ( APN Allowed ) HSS IMS Network PGw Internet Diameter , Control Plane , SCTP SGs-AP , Control Plane , SCTP GTP , Control Plane , UDP User Plane Voice Network http://TelecomTutorial.info Gx & Gy – LTE Protocols & Links Gx & Gy Links • Gx : Diameter Link connects PGW to PCRF • Used for QOS , Traffic Prioritization • Gy : Diameter Link connects PGW to OCS • MME S6 SGw HSS IMS Network PGw Gy Diameter , Control Plane , SCTP SGs-AP , Control Plane , SCTP GTP , Control Plane , UDP User Plane Used for Balance Reservation , Internet Quota Allocation & Management , Wallet for Services OCS Internet Gx PCRF DIAMETER Voice Network http://TelecomTutorial.info GTP Interfaces – LTE Protocols & Links GTP Interfaces – S10 , S11 , S5/S8 GTP Interfaces • GPRS Tunneling protocol is an important IP/UDP based protocol used in GSM, UMTS and LTE core • • • • S10 : MME to MME S11 : MME to SGw S5 : SGw to PGw ( Local Network ) S8 : SGw to PGw ( Roaming Network ) MME S10 MME HSS S6 S11 S5 S8 SGw Gy Diameter , Control Plane , SCTP SGs-AP , Control Plane , SCTP GTP , Control Plane , UDP User Plane IMS Network PGw OCS Internet Gx PCRF Voice Network http://TelecomTutorial.info Cx DIAMETER Cx 3GPP TS 29.228 , 29.229 IMS Core TAS HSS MRF MMTEL OCS Gy PCRF Gx SGw I/S-CSCF to HSS Cx S6 MME I/S-CSCF communicates with HSS to get user profile , Supports in user registration & Authentication PGw Diameter , Control Plane SIP Protocol , Control Plane User Plane I/S-CSCF BGCF SBC MGW P-CSCF / ATCF / ATGW MGCF / IM-MGW Rx IBCF/ TrGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Sh DIAMETER Sh 3GPP TS 29.328 , 29.329 HSS IMS Core TAS Sh TAS download user profile from HSS and enables service for user MRF MMTEL OCS Cx S6 MME Gy PCRF Gx SGw TAS to HSS PGw Diameter , Control Plane SIP Protocol , Control Plane User Plane I/S-CSCF BGCF SBC MGW P-CSCF / ATCF / ATGW MGCF / IM-MGW Rx IBCF/ TrGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Ro DIAMETER Ro IMS Core HSS Sh TAS Ro MMTEL TAS communicates with OCS & Prepaid Platform for Online charging of Voice Calls MRF OCS TAS to OCS S6 MME Cx Gy PCRF Gx SGw PGw Diameter , Control Plane SIP Protocol , Control Plane User Plane I/S-CSCF BGCF SBC MGW P-CSCF / ATCF / ATGW MGCF / IM-MGW Rx IBCF/ TrGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Gm SIP / SDP Gm IMS Core HSS Sh Ro OCS Gy PCRF Gx SGw PGw MRF I/S-CSCF BGCF SBC MGW P-CSCF / ATCF / ATGW IBCF/ TrGW MGCF / IM-MGW Cx S6 MME TAS MMTEL Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane Enables connectivity between the UE and the IMS network for registration, authentication, encryption, and session control UE to P-CSCF Rx BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Mw SIP / SDP Mw IMS Core HSS Sh Ro OCS Gy PCRF Gx SGw PGw MRF I/S-CSCF BGCF P-CSCF to I/S-CSCF x-CSCF to x-CSCF Cx S6 MME TAS MMTEL Used to exchange messages between CSCFs ( Ex : P-CSCF to S-CSCF ) Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane Rx Mw SBC MGW P-CSCF / ATCF / ATGW IBCF/ TrGW MGCF / IM-MGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Mx SIP / SDP Mx IMS Core HSS Sh Ro OCS Gy PCRF Gx SGw PGw MRF I/S-CSCF BGCF Cx S6 MME TAS MMTEL Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane Mw Used for the interworking with another IMS network, This is used by CSCF to send SIP message from BGCF to the IBCF in the other network I/S-CSCF to IBCF Mx Rx SBC MGW P-CSCF / ATCF / ATGW IBCF/ TrGW MGCF / IM-MGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Mg SIP / SDP Mg IMS Core HSS Sh Ro OCS Gy PCRF Gx SGw PGw MRF I/S-CSCF BGCF I/S-CSCF to MGCF Cx S6 MME TAS MMTEL Enables Interworking with Circuit Switched Network to the CSCF Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane Mw Mx Rx SBC P-CSCF / ATCF / ATGW IBCF/ TrGW Mg MGW BICC/ ISUP / SIP-I MGCF / IMMGW Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Mi SIP / SDP Mi IMS Core HSS Sh Ro OCS Gy PCRF Gx SGw PGw MRF Cx S6 MME TAS MMTEL Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane I/S-CSCF Mi Mx Mg Mw BGCF Serving CSCF to forward the SIP/SDP messages to the Breakout Gateway Control Function for the purpose of MGCF selection for interworking with Circuit Switched networks I/SCSCF to BGCF Rx SBC MGW P-CSCF / ATCF / ATGW MGCF / IM-MGW IBCF/ TrGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Mj SIP / SDP Mj IMS Core HSS Sh Ro OCS Gy PCRF Gx SGw PGw MRF Cx S6 MME TAS MMTEL Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane I/S-CSCF Mi BGCF Mx Mg Mj Mw Rx SBC P-CSCF / ATCF / ATGW IBCF/ TrGW Allows the Breakout Gateway Control Function to exchange SIP/SDP messages with the MGCF for the purpose of interworking with Circuit Switched networks BGCF to MGCF BICC/ ISUP / SIP-I MGW MGCF / IM-MGW Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info ISC SIP / SDP ISC IMS Core HSS TAS Sh Ro OCS MME Gy PCRF Gx SGw PGw Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane MRF MMTEL ISC Cx S6 SCSCF Interact with the MMTel supplementary services implemented on the TAS S-CSCF to TAS I/S-CSCF Mi Mx Mg Mw BGCF Mj Rx SBC MGW P-CSCF / ATCF / ATGW MGCF / IM-MGW IBCF/ TrGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Mr & Mr’ SIP / SDP Mr IMS Core HSS TAS Sh Ro OCS Cx S6 MME Gy PCRF Gx SGw PGw MMTEL Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane ISC Mr’ Allow interaction with the media resource (MRF) for specific supplementary services (e.g conference call) Mr : SCSCF – MRF Mr' : TAS – MRF Mr I/S-CSCF Mi Mx Mg Mw MRF Mr’ BGCF Mj Rx SBC MGW P-CSCF / ATCF / ATGW MGCF / IM-MGW IBCF/ TrGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Ut XCAP Ut 3GPP TS 24.623 IMS Core Ut HSS TAS Sh Ro OCS MME Gy PCRF Gx SGw PGw MMTEL Cx S6 Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane Mr’ ISC Mr I/S-CSCF Mi Mx Mg Mw MRF Allows user configuration of the supplementary services specified for VoLTE service to Handset Directly UE – TAS BGCF Mj Rx SBC MGW P-CSCF / ATCF / ATGW MGCF / IM-MGW IBCF/ TrGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info Sv GTPv2 Sv IMS Core HSS S6 MSC TAS Sh Ro OCS Gy MRF MMTEL Cx Sv Mr’ Sv is a new special SV interface is introduced to support SRVCC functionality ISC MME to MSC Mr I/S-CSCF Mi Mx Mg BGCF MME PCRF Gx SGw PGw Gm Diameter , Control Plane SIP Protocol , Control Plane User Plane Mw Mj Rx SBC MGW P-CSCF / ATCF / ATGW MGCF / IM-MGW IBCF/ TrGW BICC/ ISUP / SIP-I Ici / Izi Voice Network Other IMS Network http://TelecomTutorial.info LTE / VoLTE IMS Network TAS MMTEL MME Sh SGs ISC Cx OCS S6 Sv Ro HSS S10 MSC I/S-CSCF Mr BGCF Mi Gy MME Mw Mx S11 S1U MRF Mr’ SGw PCRF Gx PGw SGi S5 S8 Diameter , Control Plane SIP Protocol , Control Plane User Plane Gm Rx SBC Mg Mj IMS Core MGW P-CSCF / ATCF / ATGW IBCF/ TrGW MGCF / IM-MGW To Other IMS Networks To CS / PSTN Networks Ici/Izi BICC/ ISUP/SIP-I http://TelecomTutorial.info https://telecomtutorial.info FOR Free Download – Video Free Download – Presentation Vikas Shokeen http://TelecomTutorial.info