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UMTS ARCHITECTURE

UMTS ARCHITECTURE. MOBILE COMMUNICATION NETWORKS PRESENTATION-1. 3G System:. 3G Systems are intended to provide a global mobility with wide range of services including telephony, paging, messaging, Internet and broadband data. 

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UMTS ARCHITECTURE

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  1. UMTS ARCHITECTURE MOBILE COMMUNICATION NETWORKS PRESENTATION-1

  2. 3G System: • 3G Systems are intended to provide a global mobility with wide range of services including telephony, paging, messaging, Internet and broadband data.  • International Telecommunication Union (ITU) started the process of defining the standard for third generation systems, referred to as International Mobile Telecommunications 2000 (IMT-2000). • In Europe European Telecommunications Standards Institute(ETSI) was responsible of UMTS standardisation process. In 1998 Third Generation Partnership Project (3GPP) was formed to continue the technical specification work. • 3GPP has five main UMTS standardisation areas: Radio Access Network, Core Network, Terminals, Services and System Aspects and GERAN.

  3. 3GPP Radio Access Group is responsible for: 1. Radio Layer 1,2,3 and RF section specifications 2.UTRAN operations and maintenance req. 3.BTS Radio performance specs. 4.Iub, Iur, Iu Interfaces

  4. 3GPP Core Network is responsible for, 1.Mobility Management, Call Connection control signaling between the user equipment and Core Network 2.Core Network Signaling between the Core Nodes 3.Packet related issues. 4.Interworking function between the Core Network and External Networks 5.Iu Interface operation and maintenance req.

  5. 3GPP Terminal Group is responsible for 1.Service Capability Protocols 2.Messaging 3.services end-to-end interworking 4.USIM to mobile terminal interface

  6. 3GPP Services and System aspects are responsible for, 1.Services and Features req. 2.Charging and Accounting 3.Network management and Security aspects 4.Overall maintenance of architecture

  7. GERAN is an abbreviation for GSMEDGE Radio Access Network. The standards for GERAN are maintained by the 3GPP (Third Generation Partnership Project). • GERAN is a key part of GSM, and also of combined UMTS/GSM networks. • GERAN is the radio part of GSM/EDGE together with the network that joins the base stations (the Ater and Abis interfaces) and the base station controllers (A interfaces, etc.) • A mobile phone operator's network comprises one or more GERANs, coupled with UTRANs in the case of a UMTS/GSM network.

  8. UMTS Services: 1.Teleservices and Bearer services which provides the capability for information transfer between Access points. 2.Both Connection Oriented and Connection less services are offered Point-to-Point & Point-to-Multipoint communication. 3.Provides Virtual Home Environment, which is a concept of Personal Service Environment. 4.Personal Service Environment is the feature where Users are presented with Same Personal Features, Services ‘Wherever’ the user go and ‘Whatever’ the Network is… 5.It has improved Network Security & Location based services.

  9. UMTS QOS Classes:- 1.Coversational Class-voice, video telephony, video gaming 2.Streaming Class-streaming video, multimedia, video on demand, web cast 3.Interactive Class-web browsing, network gaming, database access 4.Background Class-telemetry, emails, downloading

  10. UMTS Data Rates:

  11. Simple UMTS Layout(UMTS Evolution)

  12. Architectureconsists of 3 domains. >>UE >>UMTS & >>CORE NETWORK

  13. UMTS ARCHITECTURE:

  14. The Basic Core Network for UMTS is based on GSM with GPRS. • All the equipment's has to be modified for UMTS operation and services • UTRAN-UMTS Terrestrial Radio Access Network provides the Air Interface Access methods for UE. • Base Station is referred as Node-B and Control Equipment for Node-B is called RNC-Radio Network Control

  15. UE-User Equipment • WCDMA/UMTS Handsets: • Nokia-6650,6641,7600,6630 • Lucent /option UMTS Data card • LGK 8000 • Panasonic • Qualcomm • Motorola-v1000 • Samsung-SGH z100, SGH z105, SGH z107 • Siemens • Sony Ericsson-v800 • WCDMA FOMA-Freedom Of Multiple Access

  16. UMTS/WCDMA Operators: • THREE Handset (Hutchison UK) • MOBIKON Austria • Vodafone Japan

  17. NTT DoCoMo's FOMA Card Three UK SIM Card with Packaging UMTS modem with SIM card

  18. USIM-User Service Identity Module: • The equivalent of a SIM in UMTS is called the “Universal Integrated Circuit Card” (UICC), which runs a USIM application. • The UICC is still colloquially called a SIM card. • Most of these UMTS identities are directly from GSM specs. • IMSI • TMSI-Temporary Subscriber Identity • P-TMSI-Packet Temporary Mobile Subscriber Identity • TLLI-Temporary Logical Link Identity • MSISDN • IMEISV-International Mobile Station Equipment Identity & Software Number • IMEI

  19. UMTS IC Cards: • UMTS IC card has the same physical characteristics as of GSM. • Functions: • Support of One Service Identity Module • Support one or more user profiles on the USIM • Security function • Operational Secure downloading of new apps. • Update USIM specs. over Air.

  20. UMTS MS Operational Modes: • The operational modes are of 3 types. They are, • PS/CS Mode : The MS is attached to both PS and CS domain and the MS is capable of simultaneously operating PS services as well asCS services. • PS Mode: The MS is attached to PS domain and the MS may only operate in PS domain. This doesn’t prevent CS like services over PS domain. • CS Mode: The MS is attached to CS domain and the MS may only operate in CS domain.

  21. UE & MS

  22. Radio Access: • Wide band CDMA technology was selected to for UTRAN air interface. UMTS WCDMA is a Direct Sequence CDMA system where user data is multiplied with quasi-random bits derived fromWCDMA Spreading codes. • In UMTS, in addition to channelization,Codes are used for synchronisation and scrambling. WCDMA has two basic modes of operation: Frequency Division Duplex (FDD) and Time Division Duplex (TDD). • UTRAN usually consists of “Node-B” and “RNC”

  23. Node-B: Its just like BTS in GSM. Logical node for Radio Transmission and Reception Functions: Air Interface Tx/Rx Modulation/Demodulation CDMA physical Channel coding Micro Diversity Error handling Closed Loop Power Control

  24. RNC: It is just like BSC in GSM. Responsible for use and integrity Radio resources within RNS Functions: Radio Resource Control Admission Control Channel Allocation Power Control Setting Handover control Macro Diversity Ciphering Broadcast Signaling Open Loop Power Control

  25. UMTS Network Layout:(Architecture)

  26. Core Network: • The core network is divided into ‘2’ domains. • Circuit Switched • MSC • VLR • Gateway MSC • Packet Switched • SGSN-Serving GPRS Support Node • GGSN-Gateway GPRS Support Node • Some elements like HLR,VLR,AUC,EIR are shared by both the domains.

  27. The Asynchronous Transfer Mode (ATM) is defined for UMTS core transmission. • ATM Adaptation Layer type 2 (AAL2) handles circuit switched connection and packet connection protocol AAL5 is designed for data delivery. • The architecture of the Core Network may change when new services and features are introduced. • Number Portability Data Base (NPDB) will be used to enable user to change the network while keeping their old phone number. • Gateway Location Register (GLR) may be used to optimise the subscriber handling between network boundaries. MSC, VLR and SGSN can merge to become a UMTS MSC.

  28. MSC:- source:3gpp • An exchange performing all the switching and signalling functions (CS only) for mobile stations. • MSC controls mobile-originated and mobile-terminated CS calls • Functions • call management • mobility management (handling attach and authentication) • subscriber administration • maintenance of charging data (for radio network usage) • CS data services (FAX, modem) • supplementary call services (call forwarding, etc.) • SS7-based signaling • Main difference to an exchange in a fixed network: deal with mobility (e.g. location registration, handover)

  29. Gateway MSC (GMSC) • It Provides interconnection between the UMTS core network and external PSTN/ISDN networks • The point where UMTS PLMN is connected to external CS Networks • PLMN-Public Land Mobile Network • Each PLMN is interconnected with another PLMN & PSTN.

  30. GPRS Support Node (GSN) • GSNs constitute the interface between the radio access network and the fixed networks for packet switched services (similar to MSC for CS calls) • Serving GSN (SGSN) • session management • mobility management • subscriber database management (interface with HLR) • maintenance of charging data (for radio network usage) • IP-based transport of user data between SGSN and the UTRAN • IP- or SS7-based signalling transport

  31. GSN ….. • Gateway GSN (GGSN) • gateway for UMTS packet service to external data networks (e.g. the Internet) • IP interface towards SGSN • performs user data screening and security • maintenance of charging data (for external data network usage)

  32. HLR: • Home (primary) data base in charge of the management of mobile subscribers • It contains: 1.International Mobile Subscriber Identity (IMSI) 2.CS subscription information -one or more Mobile Subscriber International ISDN number(s) (MSISDN) 3.PS subscription information – zero or more Packet Data Protocol (PDP) address(es) – permission for GGSN to dynamically allocate PDP addresses for a subscriber

  33. HLR …. 4.location information -enabling the charging and routing of calls towards the MSC or SGSN where the MS is registered (e.g. VLR Number) Others: • teleservices and bearer services subscription information • service restrictions (e.g. roaming limitation) • parameters attached to supplementary services

  34. Visitor Location Register (VLR) • It is (Secondary) data base supporting the management of mobile subscribers currently located within its VLR area • Motivation: minimize load for HLR (i.e. of the primary data base) • Tasks: • control MSs roaming in an MSC assigned to it • exchange information with HLR to allow the proper handling of calls

  35. VLR …. • Information maintained by VLR (for call handling): • International Mobile Subscriber Identity (IMSI) • Mobile Station International ISDN number (MSISDN) • Mobile Station Roaming Number (MSRN) • Temporary Mobile Station Identity (TMSI), if applicable • location area where the mobile station has been registered • the last known location and the initial location of the MS • supplementary service parameters attached to the mobile subscriber (received from the HLR)

  36. Authentication Centre (AuC) • Stores data for each mobile subscriber • to authenticate the International Mobile Subscriber Identity (IMSI) • to support ciphering of the communication over the radio path • The AuC transmits the data needed for authentication and ciphering via the HLR to the VLR, MSC and SGSN which need to authenticate a mobile station • AuC is associated with an HLR, and stores an identity key for each mobile subscriber • The AuC communicates solely with its associated HLR (H-interface)

  37. Equipment Identity Register (EIR) • Logical entity storing the International Mobile Equipment Identities (IMEIs) • Equipment is classified as • white listed: serie number of equipment • grey listed: equipment tracked by network • black listed: barred equipment unknown to EIR

  38. Other CN Entities: • SMS Gateway MSC (SMS-GMSC) • gateway between Short Message Service Center and PLMN • deliver SMSs from service center to MS • SMS Interworking MSC (SMS-IWMSC) • gateway between PLMN and Short Message Service Center • deliver SMSs from MS to service center • Interworking Function (IWF) • associated with MSC • supports interworking of PLMN with fixed networks, e.g. ISDN, PSTN, PDN (protocol conversion) • Border Gateway (BG) • PS gateway to other PLMNs • firewall functionality • Charging Gateway Functionality (CGF) • collects charging records from SGSNs and GGSNs

  39. Overview of PS, CS Domains & their Sharing of Network Elements

  40. UTRAN Channels:

  41. Call Origination:

  42. Overview:

  43. SOURCES: • http://www.umtsworld.com/technology/overview.htm • http://www.umtsworld.com/technology/qos.htm • http://www.umtsworld.com/technology/UMTSChannels.htm • http://www.umtsworld.com/technology/moc.htm • http://www.umtsworld.com/industry/3gphones.htm • http://en.wikipedia.org/wiki/UMTS_channels • Also refer: • 3gpp.org -3gpp 23.002-3.4.0. • Wikipedia.org

  44. THANKING YOU….., M R GOWTHAM 1327002

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