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Similaire à IMS Standards
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Plus de Marie-Paule Odini
Plus de Marie-Paule Odini (20)
IMS Standards
- 1. IP Multimedia Subsystem (IMS) standards 2010 Telecom Master Class
- 3. Simple 2G Mobile Network
- 9. Typical 2G Architecture Fixe + Mobile layer BTS — Base Transceiver Station BSC — Base Station Controller MSC — Mobile Switching Center VLR — Visitor Location Register HLR — Home Location Register BTS BSC MSC/VLR HLR BSC GMSC CO BSC BSC MSC/VLR CO PSTN PLMN CO Tandem Tandem SMS-SC PSDN
- 10. 2.5G Architectural Detail BSS — Base Station System BTS — Base Transceiver Station BSC — Base Station Controller NSS — Network Sub-System MSC — Mobile-service Switching Controller VLR — Visitor Location Register HLR — Home Location Register AuC — Authentication Server GMSC — Gateway MSC SGSN — Serving GPRS Support Node GGSN — Gateway GPRS Support Node GPRS — General Packet Radio Service 2G MS (voice only) + DATA - IP SS7 BTS BSC MSC VLR HLR AuC GMSC BSS PSTN NSS A E C D PSTN Abis B H MS IP 2G+ MS (voice & data) PSDN Gi SGSN Gr Gb Gs GGSN Gc Gn
- 11. 3G rel99 Architecture (UMTS) SS7 IP BTS BSC MSC VLR HLR AuC GMSC BSS SGSN GGSN PSTN PSDN CN Gs BSS — Base Station System BTS — Base Transceiver Station BSC — Base Station Controller RNS — Radio Network System RNC — Radio Network Controller CN — Core Network MSC — Mobile-service Switching Controller VLR — Visitor Location Register HLR — Home Location Register AuC — Authentication Server GMSC — Gateway MSC SGSN — Serving GPRS Support Node GGSN — Gateway GPRS Support Node A E PSTN 2G MS (voice only) 2G+ MS (voice & data) UMTS — Universal Mobile Telecommunication System Gb 3G UE (voice & data) Node B RNC RNS IuCS ATM + 3G Radio C D Gc Gr Gn Gi Abis B H Iub IuPS
- 12. 3G rel4 Architecture (UMTS) + Soft-switching SS7 IP/ATM BTS BSC MSC Server VLR HLR AuC GMSC server BSS SGSN GGSN PSTN PSDN CN C D Gc Gr Gn Gi Gb Abis Gs B H BSS — Base Station System BTS — Base Transceiver Station BSC — Base Station Controller RNS — Radio Network System RNC — Radio Network Controller CN — Core Network MSC — Mobile-service Switching Controller VLR — Visitor Location Register HLR — Home Location Register AuC — Authentication Server GMSC — Gateway MSC SGSN — Serving GPRS Support Node GGSN — Gateway GPRS Support Node A Nc 2G MS (voice only) 2G+ MS (voice & data) Node B RNC RNS Iub IuCS IuPS 3G UE (voice & data) Mc CS-MGW CS-MGW Nb PSTN Mc ATM
- 13. 3G rel5 Architecture (UMTS) SS7 IP/ATM BTS BSC MSC Server VLR HSS AuC GMSC server BSS SGSN GGSN PSTN CN Gs IMS — IP Multimedia sub-system MRF — Media Resource Function CSCF — Call State Control Function MGCF — Media Gateway Control Function (Mc=H248,Mg=SIP) IM-MGW — IP Multimedia-MGW Nc 2G MS (voice only) 2G+ MS (voice & data) Node B RNC RNS 3G UE (voice & data) CS-MGW CS-MGW Nb PSTN IuCS IuPS ATM IMS IP PSTN MGCF IM-MGW IP Network +IMS Gb/IuPS A/IuCS C D Gc Gr Gn Gi Abis B H Iub Mc Mc Mc MRF CSCF Mg Gs
- 14. 3GPP view of IMS
- 15. IMS : IP and PSTN convergence
- 16. IMS and EV-DO (evolution data only)
- 17. LTE architecture MME : Mobility Management Entity
- 18. LTE and Voice MSC SMSC MAP Gs SG Lu-cs A For SMS – light MSC enough For Voice – need MSC upgrade to support SRVCC (SV protocol support) Note : if VoIP is used on 3G, no need for SRVCC – using PS HO (HO = hand over = address mapping ) SV S-Gw P-Gw F
- 19. VoLTE : LTE and IMS
- 20. LTE and Policies (QoS) PCRF: Policy Charging and Rules Functions (policy decisions based on HSS/sp, applications/Rx ) P-GW : Policy Gwy = policy enforcer Packet filtering P-GW Gx S-GW S1 S5/S8 Sp eNB
- 21. IMS overview
- 30. CSCF : orchestration flows
- 33. Logical Functions of an HSS CS Domain PS Domain IM CN Subsystem C Gr D Gc Sh Si Cx GGSN SGSN CSCF IM-SSF SIP AS OSA -SCS GMSC MSC/VLR GSM SCF Mobility Management Home Subscriber Server Identification Handling Access Authorization User Security Info. Generation Service Authorization Support Application Service Support Service Provisioning Support Call/Session Establishment Support Camel Services Support User Security Support
- 34. IMS Components SIP AS
- 36. IMS Application Server (AS) Architecture OSA AS OSA AS AS : SCIM (broker) ISC Cx OSA SCS Legacy Network Element OSA API S-CSCF (Service Capability Interaction Manager) IM-SSF SS7 Mr MRF ISC Sh Si HSS Sh SIP App. Server SIP App. Server SIP App. Server
- 37. Legacy integration : * Parlay Application Server * IM-SSF to Camel
- 41. Media Resource Function MRF media server (serveur vocal) conference server
- 45. Breakout Gateway Control Function (BGCF) C,D, Gc, Gr UE Mm Mk Mk Pstn Pstn Mj Mg Mr Mp Mw Gm Dx Cx Legacy mobile signaling networks Mn Mb Mb IMS Mw PTSN HSS SLF P-CSCF MRFC MGCF BGCF BGCF IMS-MGW MRFP CSCF CSCF Gq Mi Mb Mb Mb Mb Other IMS Networks
- 47. IMS architecture & Call Flows
- 48. IMS full picture
- 49. IMS call flow
- 50. Registration process turn on phone : I am Here !
- 51. Incoming Call
- 52. IMS simplified architecture Media
- 53. Registration
- 54. Registration : SIP register ?? ?? ?? ?? ??
- 55. Session set up : SIP invite UE-1 UE-2
- 56. Session set up ?? ?? ?? ??
- 57. Presence : SIP simple Subscribe, Publish, Notify
- 58. AS to HSS : Diameter
- 59. Other examples
- 60. Push to talk session
- 61. From IMS user to CS user
- 63. On-line charging
- 64. GSM to IMS network roaming
- 65. CS user calling IMS user
- 66. Toll-free thru TCAP Gwy
- 67. Off-line charging to CAP Gwy
- 68. SMS to IMS user
Notes de l'éditeur
- MME: - Mobility Management Entity MME is a control entity, which means it’s completely responsible for all the control plane operations. All the NAS signaling originates at UE and terminates in MME. MME does tracking area list management, selection of PGW/SGW and also selection of other MME during handovers. It is the first contact point for the 2G and 3G networks. MME is also responsible for SGSN selection during LTE to 2G/3G handovers. The UE is also authenticated by MME. All signaling traffic flow through MME so the same can lawfully intercepted. MME is also responsible for bearer management functions including establishment of dedicated bearers. SGW: - Serving Gateway Serving gateway terminates the interface towards EUTRAN. For each UE associated with EPS, at a given point of time, there is a single Serving GW. SGW acts a local mobility anchor for inter eNB handovers. It also acts a mobility anchor for inter 3GPP mobility. SGW is responsible for packet routeing and forwarding, buffering the downlink packets and lawful interception. As eNB is responsible for uplink packet marking, SGW is responsible for downlink packet marking. One way to do this is mark the Diffserv field is IP packet based on QCI field. If the S5/S8 interface is PMIP based then SGW acts a Mobility Anchor Gateway (MAG). All the MAG responsibilities can be assigned to SGW. It is also responsible for assigning a GRE key that can be used by PGW in downlink. For a MAG of non trusted 3GPP access SGW acts as LMA. PGW: - PDN Gateway PGW terminates SGi interface towards the PDN. PGW is responsible for all the IP packet based operations such as deep packet inspection, UE IP address allocation, Transport level packet marking in uplink and downlink, accounting etc. PGW contacts PCRF to determine the QoS for bearers. It is also responsible for UL and DL rate enforcement based on APN-AMBR. It is synonymous to GGSN of pre release 8 networks. For PMIP based S5/S8 interface PGW acts as LMA. It is responsible for assigning IP address to UE, and also GRE Key to SGW that should be used in uplink.