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Bearer services : Telecommunications services offering transmission capabilities (bitrate, BER , synchronous/asynchronous mode ...) between network access points.
Teleservices : Telecommunications services offering capacities taking into account the terminal equipment ( telephone , SMS, ...).
Some GSM bearer services 300 to 9600 300, 1200, 1200/75, 2400, 4800, 9600 Idem 1200, 2400, 4800, 9600 2400, 4800, 9600 ISDN PSTN, ISDN PSPDN PSTN, ISDN PSTN, ISDN ISDN, PSTN PSPDN 3.1 kHz External to the PLMN A synchron ous d ata circuit duplex PAD circuit asynchronous access S ynchr d ata circuit duplex. Alternate speech and data Speech followed by data S ynchronous p acket data duplex Offered throughputs (bits/sec) Target network Bearer service
Service separated from GSM: Different fixed networks (new network entities and new protocols).
New m obile s , 3 types:
- A : GSM and GPRS at the same time,
- B : GSM or GPRS (« dual mode » in idle mode),
- C : GSM or GPRS a priori .
Services classification Data packet transfer between two points via a connection-less service (e.g. Internet) or via connection oriented service (e.g. X25) PtP – Connectionless Network Service (CNLS) Data packet transfer towards a predefined group of users in a geographical area PtM – IP Multicast (IP – M) Multicast service (cf. IP) PtM – Multicast (PtM-M) Point-to-Multipoint (PtM) Data packet transfer from a point towards a geographical area (group of cells) PtP – Connection Oriented Network Service (CONS) Point-to-Point (PtP) Characteristics Sub-types Service type Services
Development initial planning 3G commercially available Mid-2004 3G applications develop ment 2002-2003 3G pilot networks in Western Europe. 2002 3G terminals available (first specifications) Mid-2002 First 3G networks opened in countries such as Japan, based on first 3G specifications Mid-2001 3G licenses allocation in Europe 2000-2001 IMT-2000 specifications validation by ITU-R May 2000 First demonstrations of 3G systems 2000 Radio interface definition 1998-1999
Roadmap to All-IP Networks - 3GPP R6+ PS + IM Domain All-IP IPv4 & IPv6 Networks IP in UTRAN E-GGSN E-SGSN RNC RNC E-GGSN
UMTS features and sub-systems for service provision Introduction of IP D e velopment of multim e dia IP services with hardware and software componants integration Customization User framework portability Provision by third parties Services de velopment by external applications and contents providers Terminal related Adaptation of the service to the user terminal according to its c h aract e risti c s, task sharing with the network MeXE Mobile eXecution Environment VHE Virtual Home Environment OSA Open Service Access IMS IP Multimedia Service
Implementation of many e quipments, software s, interfaces, protocols , which may cause integration, interworking and optimisation probl e ms
Ex.: S- CSCF ( Call Status Control Function ); SIP AS ( SIP Application Server ); OSA SCS ( Service Capability Server ); IM-SSF ( Inter-working Module ); CSE ( Camel Service Environment ); HSS (Home Subscriber Server)
S e curit y and QoS with Internet interconne ct ion
Princip l es Drawbacks
QoS characteristics d iff e ren t iation for voice or video associated with a multimedia session (streaming, IM, etc.)
S e paration of the plan e s IP data and session contr ol (SIP)
Ind e pendan t from the access network
Introduction of multim e dia services with QoS management
Integration with other networks (WLANs, fixe d , CDMA2000, …)
Flexible billing : billing / service, connectivit y , QoS, time , destination
A d vantages IMS for mobile networks GPRS, EDGE, UMTS & CDMA2000 N on re a l time s ervices IP multim e dia applications p late-form IETF specifications based IMS extended to wideband fixe d network s (xDSL, WLAN, c a ble, …) Support s services convergence on fixe d and mobile network s (conversion CS voi ce tra f fic i n IP) R6 R5
Compo n ants and interactions between IMS and other networks Application Servers (SIP, OSA, CAMEL) Session Control Media Control IMS User Data Media Gateway PSTN Pa ck et network ISUP Packet Support Node Backbone IP Packet Gateway RNC RAN Core pa ck et SIP SIP Media Gateway PCM AMR
PSE ( Personal Service Environment ) p ortabilit y between networks and terminals : user – services interaction modes, multiple subscriptions management (pro/perso), multiple termina ls and pr e f e rences according to the location .
Same features always available to the user : interface and services customization , whatever the network and the terminal .
Ind e pendanc y relatively to the network (roaming) and the terminal
Applications VAB Virtual Address Book Use of many types of terminals to access and update user data Customer Care service Support to the users: interacti ve tutorials, problems d e tection and solutions proposal , on-line assistance, … Calender multiparty application C oord i n ated calendar management among remote users : answers collect ion , meeting dates determination , … Multimedia Delivery service Adaptation of the video to the user terminal
Operator and user profiles management through radio interface ( OTA, Over The Air ): VAS real-time impl e mentation, with updates and applets downloading, file management, …
Point-to-point messages exchange security provision in OTA
S e curit y
Pro-active SIM card for execution of features; management of UE by USIM and thus by the operato r
SIM Application Toolkit (STK)
OTA based on SMS transport , then via other bearers (CSD, GPRS, UMTS)
Op e rations
Interactions for service provision in UMTS IMS Multimedia IP servers Application and Content providers A pplication s ervers BDD & user profil e s (PSE, VHE, …) OSA RAN (CAC, LC) QoS management USAT, MeXE, OTA, CAMEL, LCS, …
Services evolution in UMTS R99/R4/R5/R6 networks Evolution of the services (voice and interpersonal services) Voice SMS/MMS Voice Messaging Videotelephony Voice/Videotelephony Instant Messaging/Presence Rich Call Services Messaging Voice/Videotelephony IM/Presence Messaging RCS LCS GTT MBMS, IMS phase 2 R6 VoD, IMS, HSDPA, Wideband AMR, GTT R5 TrFO, VHE, OSA, LCS in PS and CS, R4 MMS, streaming, LCS (cell), MExE, SAT, VHE, R99 Services Release
I n R5, d e finition of 5 signalling sc e narios for end-to-end QoS :
3 with PDP/DiffServ inter working ,
2 with RSVP signalling
Core network CAC - Call Admission Control
RNC : adm i t s o r reje c t s new users or new RAB ( Radio Access Bearers ) according to network load , users priorities and resource availability
U sed at network UE access : RAB reconfiguration o r allocation and HO according to the events
UL channel interference and DL power related
RNC : supervise s , d e tect s and manages congestion situations during users conne ct ion
Load reduction via queueing mechanisms,, by delaying the packets of the best effort traffic
M e c h anisms no t standardised , designed by the equipment vendors and optimised by the operators
Princip l es : CAC bas ed on the interference level , on the admission politics/load factor , etc.
Cell breathing phenomena Case 1: 20 users Case 2: 10 users Radio phenomena cells
Capacity, cell radius and noise rise Cell load = 20% of the maximum capacity Interference level= y dB R and R’ are the cell radius in the 2 load situations Cell load = 50% of the maximum capacity Interference level= y + 2 dB