Keep people connected at all times and in all places."

Overview:International Mobile Telecommunications-2000.

Standards for Mobile Telecommunications.

Effort : To create a new air interface that would increase frequency usage efficiency.

3G-Features:Enhanced multimedia (voice, data, video, and remote control)Usability on all popular modes (cellular telephone, e-mail, paging, fax, videoconferencing, and Web browsing)Broad bandwidth and high speed (upwards of 2 Mbps)Routing flexibility (repeater, satellite, LAN)Operation at approximately 2 GHz transmit and receive frequencies.Roaming capability.

Services:

Work:Video ConferenceMedia:News papers, Magazines Shopping:e-commerce, e-walletEntertainment:Sports, GamesEducation:Online LibrariesAutomation:Home AutomationTravel:e-tours, location awarenessFun:www, sms,mp3Add-ons : TV , Radio, etc..3G Phones & Devices:

3G-Stadards:Cdma2000

UMTS UMTSUniversal Mobile Telecommunications System UMTS- Overview:Recent Telecom standard System (3G) developed from existing GSM System.

It is a reluctant of R&D done on various levels of 1G & 2G Systems.

Designed to provide Seamless Telecom Services with enhancement in quality, data rate, reliability, connectivity and next generation technologiesGSM Vs UMTS:Major Difference:Air Interface

GSM -> TDMA & FDMA

UMTS -> W-CDMA ( Wideband-Code Division Multiple Access )

UMTS Architecture OverviewUMTS Networks:

Architecture:

ContndUses same core network(CN) as that of GPRS and an entirely new radio interface(UTRAN).

Need for new radio interface, 1. Support of general QoS - data rate - delay - error characteristics

2. Support of multimedia service

3. Support of 2Mbps

UMTS interfaces

Uu : UE to Node B interface Iu : RNC to Core Network Iu-CS : for Circuit Switched data Iu-PS : for Packet Switched data Iub : RNC to Node-B interface Iur : RNC to RNC interfaceCORE NETWORK(CN)

The core network of UMTS is decomposed into two service domains, 1. Circuit switched(CS) domain 2. Packet switched(PS) domain

UTRAN: It is the new radio interface of UMTS and it mainly consists of,

RNC Node-B UE

RNC

RNCRNC is responsible for,

Radio Resource Management within the RNS Power Control Soft handover

Node-B

Node-BThe main tasks of Node B are, Conversion to & from Uu radio interface Forward error checking WCDMA spreading/ de spreading Modulation/ Demodulation Power Control

UE

Figure : UMTS UE UE as Node-B Counterpart

Encoding/decoding and interleaving Power control Spreading/de- spreading Modulation/ demodulation

UE as RNC CounterpartUE as CN Counterpart

Acknowledged modeCiphering/ DecipheringHandover(CS) & Cell selection(PS)

Mobility management Session management

PROTOCOL ARCHITECTURE

L1 Protocol - Physical layer L2 Protocol - MAC Protocol - RLC Protocol - PDC Protocol - BMC Protocol L3 Protocol RRC Protocol NAS Protocol SAPsPhysical Layer: Responsible for entire physical layer processing across Uu interface

Located in the UE and on the network side it is mainly located in the Node-B

Within WCDMA system, the physical channels are constructed using special codes referred as channelization codes and Scrambling codes

Functions of physical layer, - Chip rate Processing - Symbol rate Processing

MAC- Protocol: Responsible for dynamic resource allocation under the control of RRC Priority handling of data flow Mapping between logical and transport layers Performs ciphering task when RLC is operating in transport mode Provides multiplexing functions

RLC Protocols : There will be number of RLC instances such as one per service Each RLC entity is configured different from other RLC entity Services provided by the RLC, - Segmentation and reassembly - Flow control and in sequence delivery of PDUs - Error correction

PDC Protocol: It provides Header Compression(HC) functions Supports for lossless SRNS relocation

BMC Protocol: It provides support for the cell broadcast SMS BMC messages are received on a common physical channel The messages are periodic, with the periodicity defined by the parameters that are broadcast to the UE The UE is able to select & filter the broadcast messages according to the settings defined by the user

RRC Protocol : The RRC protocol is responsible for, - Establishment, Modification, Release of radio connections between UE and UTRAN - Creation of user plane connections, referred as Radio Access Bearers (RABs)

Provides radio mobility functions such as, - Control of Soft-handover to same frequency UMTS cells - Control of Hard-handover to other UMTS cells - Control of Hard-handover to other RAT cells such as GSM

NAS Protocol: These are the higher level protocols that exists between the UE & CN The NAS protocols are used to provide features such as, - Registration - Authentication - MM functions

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