Presentation is loading. Please wait.

Presentation is loading. Please wait.

Future Mobile Networks Policy and Regulatory Requirements for Future Mobile Networks June 22nd 2005 F. COURAU M. OLSSON.

Similar presentations

Presentation on theme: "Future Mobile Networks Policy and Regulatory Requirements for Future Mobile Networks June 22nd 2005 F. COURAU M. OLSSON."— Presentation transcript:

1 Future Mobile Networks Policy and Regulatory Requirements for Future Mobile Networks June 22nd 2005 F. COURAU M. OLSSON

2 IMS regulation – June05 Page 2 Introduction Policy and Regulation Network Sharing IP Multimedia System IMS

3 IMS regulation – June05 Page 3 Network Sharing NETWORK SHARING: Regulation to impose sharing of part of the network elements between two or more operators on a regional basis

4 IMS regulation – June05 Page 4 Network sharing in Release 99, 4 and 5 CN PLMN1 CN PLMN2 CN PLMN3 One Radio per PLMN

5 IMS regulation – June05 Page 5 Network sharing in Release 6 CN PLMN1 CN PLMN2 CN PLMN3 Different PLMNS on a single radio

6 IP Multimedia System

7 IMS regulation – June05 Page 7 IP support in Mobile Network A bit of history Support of IP services was first introduced in GSM networks in Release 97 of the specifications as complement to the Circuit Switched Services The packet services was introduced in such a way that it did not destabilize the provision of Circuit Switched services and it also minimized the impact on the Radio part. The specifications defines a mobile specific architecture taking the roaming and the mobility aspects into account and offering a differentiated Quality of Service When defining the third generation systems (Release 99) the support of packet services was fully integrated in the architecture Release 99 for both GSM and UMTS introduced the notion of Quality of Service (Background, Real time, Interactive)

8 IMS regulation – June05 Page 8 GPRS Architecture Overview MSC/VLR HLR ISDN SGSNGGSN GPRSBackbone InternetX.25 GPRS Mobile BSS with PCU DNS DHCP FrameRelay

9 IMS regulation – June05 Page 9 General Architecture Overview Circuit Switched Domain Packet Switched Domain IP Multimedia Subystem Other Accesses (e.g.WiFi CDMA2000) IP Multimedia Network UTRAN BSS/GERAN IP Network PSTN / CS PLMN

10 IMS regulation – June05 Page 10 Main IMS Features A Multi-phase Standardisation IMS Phase 2 - 3GPP Rel6 Inter-working with non-IMS IP networks (e.g. Internet) Inter-working with CS networks (e.g. PSTN, CS PLMN) IMS Services combining CS (rt) & PS (nrt) : CSI Phase 1 Access agnostic IMS specifications UTRAN QoS optimisation for PS conversational services WLAN/3GPP inter-working for using PS/IMS services Presence/Instant Messaging (SIMPLE) OMA Group management & Conferencing (SIP) Immediate and Session based messaging Service enablers for IMS : PoC OMA Dynamic QoS policy (including Gq (P-CSCF/PDF)) Lawful interception SIP forking Full charging framework (incl. Online and Flow based) IPv4 option & IPv6 evolution guidelines still applicable IMS Phase 1 - 3GPP Rel5 SIP Session Control for IMS Signalling Security & IMS Authentication : SIP signalling integrity (IPSec : UE / P-CSCF) IMS User/Service authentication (IMS-AKA) QoS : SBLP (Go : P-CSCF-PDF / GGSN-PEF) SIP Compression (Sigcomp, UE/P-CSCF) Header compression in RAN (UE / RNC, re-use of RoHC) Charging (mainly Offline) and OAM&P Multimedia codecs OSA support CAMEL (Phase 4) for IM-SSF IPv6 use for SIP signalling and IMS user traffic IPv4 optional (guidelines & IPv6 evolution) Emergency services IMS local services Enhanced QoS (extension for IP Inter-working) MRFP / MRFC (Mp) & ALG/Tr-GW (Ix) interfaces GERAN optimisation for PS conversational services IMS Phase 3 - 3GPP Rel7 (Draft contents, depends on Rel6 and company proposals) IMS enhancements for Fixed Broadband access Interim Security (IP based authentication) Merging of Go and Gx (TPF/FBC) interfaces

11 IMS regulation – June05 Page 11 I M S IP Multimedia Subsystem IMS Primarily designed (3gpp R5) to work on top of GPRS using SIP signalling But extended (3gpp R6) to work on top on non-GPRS based access and SIP TEs (Harmonised with the 3GPP2 (CDMA 2000) IP Multimedia Domain (MMD)) On going work with ETSI TISPAN to adapt IMS for requirements of fixed networks Services on top of IMS (e.g. MMS, PoC, IM/PM, DRM, DM are also developed by other organizations like OMA. Circuit Switched Domain Packet Switched Domain IP Multimedia Subystem Other Accesses (e.g.WiFi CDMA2000) IP Multimedia Network UTRAN BSS/GERAN IP Network PSTN / CS PLMN

12 IMS regulation – June05 Page 12 3GPP IMS Architectural Overview IMS-MGW IPv6 PDN (IPv6 Network) MGCF PDF I-CSCFS-CSCF BGCF Application (Ext. SIP AS, OSA AS, CAMEL SE) MRFC MRFP MRF IPv4/IPv6 BB CS Networks (PSTN, CS PLMN) CSCF P-CSCF SGW OSA SCS IM SSF SIP AS AS BGBG SLF AL G TrGW IMS IPGW IPv4 PDN (IPv4 Network) IP CAN ABG TE AN IMS Terminal PE F/T PF HLR/AuC (CS/PS) HSS IMS Data Handling

13 IMS regulation – June05 Page 13 Main IMS principles 2 phase registration, UE IMS GPRS 1. Bearer Level Registration: e.g.GPRS Attach (2. Establishing signaling link e.g. PDP Context Activation) 3. CSCF Discovery 4. Application (IMS) Level Registration specific (QoS, charging, security,) at Access and at IMS case

14 IMS regulation – June05 Page 14 IMS in PLMNs & Roaming Service Network UE GGSN SGSN PDP Context Access network connecting the user Gi IM CN SUBSYSTEM P-CSCF Proxy CSCF in Home Network Proxy CSCF in Home Network This is in fact the GPRS roaming case S-CSCF / AS The S-CSCF is always located in the Home Network Two possible Cases Home Network Visited Network IM Subsystem Inter-Network IP Backbone Internet Intranets UE GGSN BG SGSN PDP Context Visited Network Gi Virtual presence of UE in visited network IM subsystem (UEs IP-address is here) Proxy CSCF in Visited Network Proxy CSCF in Visited Network P-CSCF S-CSCF / AS This case is possible too IM Subsystem P-CSCF / PDF are located in the same network as GGSN

15 IMS regulation – June05 Page 15 IMS Communication Focus Example with two Roaming IMS Mobile Users SGSNGGSN SGSN UE B UE A Access Network A SIP/SDP inviting P-CSCF C SIP / SDP S-CSCF A P-CSCF D ServicePlatformA (AS A ) S-CSCF B Go SIP/SDP IP Backbone Network Data-Path PDP Context Session level (SIP/SDPsignalling) Bearer level (PDPcontext activation / modification /Release) Interaction between session and bearer level (COPS) PDF Gm PDP Context SIP / SDP ServicePlatformB (AS B ) PDF I-CSCF (between P-CSCF and S-CSCF) not shown for simplicity Go Serving Network A Serving Network B Access Network B

16 IMS regulation – June05 Page 16 IMS charging and QoS: interface between service and access network IP Multimedia Subystem Packet Switched Domain (Access) Access GW (GGSN) Policy and charging Relay P-CSCF Go,Gx Gq,Rx Pre-paid Subscription database Three types of charging -On line charging -Off line charging -Flow based charging

17 IMS regulation – June05 Page 17 Emergency & LI Overview For the target IMS only service, Emergency calls via IMS to be deployed (3GPP R7) But absence of deployment of an IMS emergency infrastructure does not block deployment of IMS conversational service provided that UE or Network can detect emergency requests and direct them via CS domain A call back from Emergency Center is always directed to UE via CS domain LI infrastructure in PLMN (ADMF, DF) to be upgraded to take into account IMS and to inter-operate with CSCF. For 3gpp, IMS specific interception deals only with signaling plane interception. User plane interception is to be carried out at Access level (GPRS) Note that user plane generally goes directly from UE to UE without being handled by any MGW (only IW with CS networks) in the network ADMF = LI administration DF = Delivery Function (to LEA= Law Enforcement Agency)

18 IMS regulation – June05 Page 18 LI for 3GPP IP/IMS : Simplified Overview of Functional Architecture Mobile LI target LEMF HI1 HI2 3GPP Interfaces IP- HI3 GGSN* SGSN IP Backbone Iu/Gb Gi Internet Gn LIG RAN X3 MM Call Server P-CSCF/ S-CSCF X1 X2 IMS Domain * Interception at GGSN is optional Gi Radio Network IMC ADMF DF2/ DF3 X1_2/3p Signalling (incl.SIP) User Plane Management Interception of signalling is called IRI = Intercept Related Information

19 IMS regulation – June05 Page 19 Annex: A few abbreviations explained Definitions GPRS GGSN Gateway GPRS Support Node SGSN Serving GPRS Support Node IMS APIApplication Program Interface ASApplication Server BCSMBasic Call State Model BGBorder Gateway BGCFBreakout Gateway Control Function CSCFCall Session Control Function MGCFMedia Gateway Control Function MGFMedia Gateway Function P-CSCFProxy CSCF S-CSCFServing CSCF

20 IMS regulation – June05 Page 20 Thank You for Your Attention & Alcatel Mobile Solutions

21 IMS regulation – June05 Page 21

Download ppt "Future Mobile Networks Policy and Regulatory Requirements for Future Mobile Networks June 22nd 2005 F. COURAU M. OLSSON."

Similar presentations

Ads by Google