2G Mobile Communication Systems
|
|
- Nicholas Wilcox
- 8 years ago
- Views:
Transcription
1 2G Mobile Communication Systems 2G Review: GSM Services Architecture Protocols Call setup Mobility management Security HSCSD GPRS EDGE
2 References Jochen Schiller: Mobile Communications (German and English), Addison-Wesley, 2000 (most of the material covered in this chapter is based on the book) Michel Mouly, Marie-Bernadette Pautet: The GSM System for Mobile Communications. Telecom Pub, Juni 1992 Jörg Eberspaecher, u. a.: GSM Switching, Services and Protocols. John Wiley and Sons Ltd, 2001 Siegmund Redl, u. a.: GSM and Personal Communications Handbook. Artech House, 1998 Gunnar Heine: GSM Networks: Protocols, Terminology, and Implementation. Artech House Mobile Communications Library. Artech House Publishers,
3 Public Land Mobile Network (PLMN) Definition: a network established and operated by an administration to provide land-based mobile telecommunications services to the public a PLMN may be regarded as an extension of a network (e.g. an ISDN) a PLMN consists of a collection of areas within a common numbering plan (e.g. same National Destination Code) and a common routing plan PLMNs are independent telecommunications entities Source: 3GPP
4 GSM: Mobile Services GSM offers several types of connections voice connections data connections short message service multi-service options (combination of basic services) Three service domains (a mobile model of ISDN) Bearer Services Teleservices Supplementary Services MS TE bearer services MT GSM-PLMN transit network source/ destination R, S (PSTN, ISDN) network (U, S, R) U m TE teleservices PLMN: Public Land Mobile Network PSTN: Public Switched Telephone Network ISDN: Integrated Services Digital Network MS: Mobile Station MT: Mobile Termination (radio-specific part) TE: Terminal 4
5 Bearer Services Telecommunication services to transfer data between access points Specification of services up to the terminal interface (OSI layers 1-3) Different data rates for voice and data (original standard) data service (circuit switched) synchronous: 2.4, 4.8 or 9.6 kbit/s asynchronous: bit/s data service (packet switched) > superseded by GPRS synchronous: 2.4, 4.8 or 9.6 kbit/s asynchronous: bit/s 5
6 Teleservices Telecommunication services that enable voice communication via mobile phones mobile telephony primary goal of GSM was to enable mobile telephony offering nearly ISDN quality (bandwidth of 7 khz); Today: Fullrate codec (FR 13kb/s), halfrate (HR-5.6kb/s), Enhanced Fullrate (EFR- 12.2kb/s) emergency number common number throughout Europe (112); mandatory for all service providers; free of charge; connection with the highest priority (preemption of other connections possible) multinumbering several ISDN phone numbers per user possible Non-Voice Teleservices group 3 fax voice mailbox (implemented in the GSM network) Short Message Service (SMS) alphanumeric data transmission to/from the mobile terminal using the signaling channel, thus allowing simultaneous use of basic services and SMS 6
7 Supplementary services Services in addition to the basic services cannot be offered stand-alone similar to ISDN services besides lower bandwidth due to the radio link may differ between different service providers, countries and protocol versions Important services call forwarding identification: forwarding of caller number suppression of number forwarding (CLIP, CLIR) automatic call-back conferencing with up to 7 participants locking of the mobile terminal (incoming or outgoing calls)... 7
8 Architecture of the GSM system GSM is a PLMN (Public Land Mobile Network) several providers setup mobile networks following the GSM standard within each country GSM system comprises 3 subsystems RSS (radio subsystem): covers all radio aspects MS (mobile station) BSS (base station subsystem) or RAN (radio access network) BTS (base transeiver station) BSC (base station controller) NSS (network and switching subsystem): call forwarding, handover, switching MSC (mobile services switching center) LR (location register): HLR and VLR OSS (operation subsystem): management of the network OMC (operation and maintenance centre) AuC (authentication centre) EIR (equipment identity register) 8
9 GSM: overview NSS with OSS OMC, EIR, AUC HLR GMSC fixed network VLR MSC VLR MSC BSC BSC RSS BTS BTS BTS BSC: n:1 (tree) BSC MSC: n:1 (tree) MSC VLR: 1:1 MSC MSC : meshed network 9
10 GSM: elements and interfaces radio cell MS MS BSS RSS U m BTS radio cell MS U m Interface (MS and BTS): radio, air interface BTS A bis A bis Interface (BTS and BSC) BSC BSC A A Interface (BSC and MSC) MSC MSC NSS VLR HLR O VLR GMSC IWF signaling ISDN, PSTN PDN Interfaces B,...,H within NSS (between MSC, VLR and HLR) OSS EIR AUC OMC 10 o
11 Radio subsystem The Radio Subsystem (RSS) comprises the cellular mobile network up to the switching centers Components Base Station Subsystem (BSS) Base Transceiver Station (BTS) radio components including sender, receiver, antenna one BTS can cover several cells Base Station Controller (BSC) switching between BTSs, controlling BTSs, managing of network resources, mapping of radio channels (U m ) onto terrestrial channels (A interface) BSS = BSC + sum(bts) + interconnection Mobile Stations (MS) 11
12 Base Transceiver Station and Base Station Controller Tasks of a BSS are distributed over BSC and BTS BTS comprises radio specific functions of lower layers (PHY, MAC) BSC manages and controls the radio channels in the BTS and terrestrial channels to BTS and MSC Design Principle: central intelligence = BSC, dumb radio station = BTS Functions BTS BSC Management of radio channels X Frequency hopping (FH) X X Management of terrestrial channels X Mapping of terrestrial onto radio channels X Channel coding and decoding X Rate adaptation X Encryption and decryption X X Paging X X Uplink signal measurements X Traffic measurement X Authentication X Location registry, location update X Handover management X 12
13 GSM: cellular network segmentation of the area into cells possible radio coverage of the cell cell idealized shape of the cell use of several carrier frequencies not the same frequency in neighboring cells cell radius varies from some 100 m up to 35 km depending on user density, geography, transceiver power etc. hexagonal shape of cells is idealized (cells overlap, shapes depend on geography) if a mobile user changes cells -> handover of the connection to the neighbor cell 13
14 GSM: Air Interface FDMA (Frequency Division Multiple Access) / FDD (Frequency Division Duplex) Uplink 890 MHz 915 MHz Downlink 935 MHz 960 MHz khz frequency TDMA (Time Division Multiple Access) Downlink Uplink ,615 ms = 1250 bit time 14
15 GSM: Voice Coding Voice coding Channel coding Framing Modulation (GMSK) 114 bit/slot bit GSM TDMA frame ms GSM time-slot (normal burst) guard space tail user data S Training S user data tail 3 bits 57 bits 1 26 bits 1 57 bits 3 guard space µs 577 µs Guard (8.25 bits): avoid overlap with other time slots (different time offset of neighboring slot) Training sequence: select the best radio path in the receiver and train equalizer Tail: needed to enhance receiver performance Flag S: indication for user data or control data 15
16 GSM hierarchy of frames hyperframe h 28 min s superframe s traffic multiframe ms control multiframe ms frame slot burst ms 577 µs traffic multiframe: 24 frames (22.8 kbps) used for traffic channel (user data), or fast signaling 1 frame (950 bps) used for slow signaling, 1 frame unused 16 o
17 Mobile station Terminal for the use of GSM services A mobile station (MS) comprises several functional groups MT (Mobile Termination): offers common functions used by all services the MS offers corresponds to the network termination (NT) of an ISDN access end-point of the radio interface (U m ) TA (Terminal Adapter): terminal adaptation, hides radio specific characteristics TE (Terminal Equipment): peripheral device of the MS, offers services to a user does not contain GSM specific functions SIM (Subscriber Identity Module): personalization of the mobile terminal, stores user parameters, and security algorithm TE TA MT R S U m 17 o
18 Network and switching subsystem (NSS) NSS is the main component of the public mobile network GSM switching, mobility management, interconnection to other networks, system control Components Mobile Services Switching Center (MSC) controls all connections via a separated network to/from a mobile terminal within the domain of the MSC - several BSC can belong to a MSC Databases (important: scalability, high capacity, low delay) Home Location Register (HLR) central master database containing user data, permanent and semipermanent data of all subscribers assigned to the HLR (one provider can have several HLRs) Visitor Location Register (VLR) local database for a subset of user data, including data about all user currently in the domain of the VLR 18
19 Operation subsystem The OSS (Operation Subsystem) enables centralized operation, management, and maintenance of all GSM subsystems Components Authentication Center (AUC) generates user-specific authentication parameters on request of a VLR authentication parameters used for authentication of mobile terminals and encryption of user data on the air interface within the GSM system Equipment Identity Register (EIR) registers GSM mobile stations and user rights stolen or malfunctioning mobile stations can be locked and sometimes even localized Operation and Maintenance Center (OMC) different control capabilities for the radio subsystem and the network subsystem 19
20 Basic Functions in GSM Systems Connection Setup Handover Location management Roaming Authentication
21 Connection Setup & Radio Resource Assignment BS BSC MSC 21
22 Mobile Terminated Call (MTC) 1: calling a GSM subscriber 2: forwarding call to GMSC 3: signal call setup to HLR 4, 5: request MSRN from VLR 6: forward responsible MSC to GMSC 7: forward call to current MSC calling station 8, 9: get current status of MS 10, 11: paging of MS 12, 13: MS answers 14, 15: security checks 16, 17: set up connection PSTN 1 2 HLR 3 6 GMSC VLR MSC BSS BSS BSS MS
23 Mobile Originated Call (MOC) 1, 2: connection request 3, 4: security check 5-8: check resources (free circuit) 9-10: set up call VLR PSTN 6 5 GMSC MSC 2 9 MS 1 10 BSS 23
24 Handover The problem: Change the cell while communicating Reasons for handover: Quality of radio link deteriorates Communication in other cell requires less radio resources Supported radius is exceeded (e.g. Timing advance in GSM) Overload in current cell Maintenance Link quality cell 1 cell 2 cell 1 cell 2 Handover margin (avoid ping-pong effect) Link to cell 1 Link to cell 2 time 24
25 4 types of handover MS MS MS MS BTS BTS BTS BTS BSC BSC BSC (Anchor) MSC MSC intra-cell handover: reason: quality, interference inter-cell handover/intra BSS: within same BSS, handled by BSC (reason mobility, receipt level, power budget, load) inter-cell handover/inter BSS: between BSC at the same MSC inter-cell handover/inter MSC: between BSC of different MSCs (Anchor MSC: the initial MSC, which started the connection, keeps control) GMSC 25
26 GSM: Handover Principle Before X During X After X BS BS BS BS BS BS Hard handover, make before break Mobile assisted handoff/handover (MOHA): MS sends regular measurement reports to network (own cell, neighbor cells, every 480 ms) Network (old BSC) decides upon handover (when, target cell) Network (old BSC) sets up new communication path Network (old BSC) instructs the MS to execute handover 26
27 Handover procedure (change of BSC) Make-before-break strategy MS measurement report BTS old measurement result BSC old MSC BSC new BTS new HO decision HO required HO request resource allocation ch. activation HO command HO command HO command HO access HO request ack ch. activation ack make Link establishment clear command clear complete clear command clear complete HO complete HO complete break 27
28 Security in GSM Security service System was designed with a moderate level of security to authenticate the subscriber using a pre-shared key and challenge-response. access control/authentication user SIM (Subscriber Identity Module): secret PIN (personal identification number) SIM network: challenge response method no authentication of network! confidentiality voice and signaling encrypted on the wireless link (after successful authentication) anonymity temporary identity TMSI (Temporary Mobile Subscriber Identity) newly assigned at each new location update encrypted transmission 3 algorithms specified in GSM A3 for authentication ( secret, open interface) A5 for encryption (standardized) A8 for key generation ( secret, open interface) secret : A3 and A8 available in the Internet network providers can use stronger mechanisms 28
29 GSM - authentication K i RAND 128 bit 128 bit AuC A3 Challenge-Response: Authentication center provides RAND to Mobile AuC generates SRES using Ki of subscriber and RAND via A3 Mobile (SIM) generates SRES using Ki and RAND Mobile transmits SRES to network (MSC) network (MSC) compares received SRES with one generated by AuC SRES* 32 bit RAND mobile network Authentication Request (RAND) RAND K i 128 bit 128 bit A3 SIM SRES 32 bit MSC SRES* =? SRES Authentication Response (SRES 32 bit) SRES K i : individual subscriber authentication key SRES: signed response 29
30 GSM - key generation and encryption Ciphering: Data sent on air interface ciphered for security A8 algorithm used to generate cipher key A5 algorithm used to cipher/decipher data Ciphering Key is never transmitted on air MS with SIM K i RAND RAND RAND K i AuC 128 bit 128 bit 128 bit 128 bit SIM A8 A8 cipher key K c 64 bit mobile network (BTS) K c 64 bit BTS A5 data encrypted data SRES data A5 MS 30
31 2G+: GSM Evolution Limits of GSM limited capacity at the air interface: data transmission standardized with only 9.6 kbit/s advanced coding allows 14,4 kbit/s not enough for Internet and multimedia applications => EDGE inappropriateness for bursty and non-symmetrical data traffic => GPRS Extensions HSCSD (High-Speed Circuit Switched Data) GPRS (General Packet Radio Service) EDGE (Enhanced Data Rate for GSM Evolution) EGPRS (EDGE und GPRS) GERAN (GSM Interface to UMTS) 31
32 HSCSD (High-Speed Circuit Switched Data) continuous use of multiple time slots for a single user (on a single carrier frequency) asynchronous allocation of time slots between DL and UL gain: net data rate up to 115,2 kbps (allocation of all 8 traffic channels) Downlink Uplink mainly software update additional HW needed if more than 3 slots are used 32
33 GPRS (General Packet Radio Service) Introducing packet switching in the network Using shared radio channels for packet transmission over the air: multiplexing multiple MS on one time slot flexible (also multiple) allocation of timeslots to MS (scheduling by PCU Packet Control Unit in BSC or BTS) Multiplexing Multislot capability TS carrier using free slots only if data packets are ready to send (e.g., 115 kbit/s using 8 slots temporarily) standardization 1998, introduction 2001 advantage: first step towards UMTS, flexible data services 33
34 GPRS architecture and interfaces SGSN connection-oriented packet switched core G n MS BSS SGSN GGSN PDN / Internet U m G b G n G i MSC HLR/ GR VLR EIR 34 o
35 EDGE (Enhanced Data Rates for GSM Evolution) Enhanced spectral efficiency depends on: Size of frequency band Duration of usage Level of interference with others (power) Near-far problem EDGE Technology: EDGE can carry data speeds up to kbit/s for 4 timeslots (theoretical maximum is kbit/s for 8 timeslots) Adaptation of modulation depending on quality of radio path GMSK (GSM standard 1 bit per symbol) 8-PSK (3 bits per symbol) Adaptation of coding scheme (redundancy) depending on quality of radio path (9 coding schemes) Gain: data rate (gross) up to 69,2 kbps (compare to 22.8 kbps for GSM) complex extension of GSM! NodeB UE 1 UE 2 35
36 2G to 3G Evolution: GSM - GPRS - UMTS Transmission ATM based ISDN GSM RAN controller MSC GSM Core (Circuit switched) GMSC GSM HLR AuC EIR 36
37 2G to 3G Evolution: GSM - GPRS - UMTS Transmission ATM based ISDN GSM RAN controller MSC GSM Core (Circuit switched) GMSC GSM+GPRS HLR AuC EIR SGSN GPRS Core (Packet Switched) GGSN Internet 37
38 2G to 3G Evolution: GSM - GPRS UMTS R99 GSM RAN controller MSC Transmission ATM based GSM Core (Circuit switched) GSM+GPRS+UMTS R99 HLR AuC EIR GMSC ISDN UTRAN Radio network controller SGSN GPRS Core (Packet Switched) GGSN Internet 38
39 2G to 3G Evolution: GSM - GPRS - UMTS R5 - IMS GERAN GSM RAN controller GERAN + UMTS R5 + IMS UTRAN Radio network controller SGSN Transmission IP based 3G Core GPRS Core (Packet Switched) GGSN Internet 39
How To Understand The Gsm And Mts Mobile Network Evolution
Mobile Network Evolution Part 1 GSM and UMTS GSM Cell layout Architecture Call setup Mobility management Security GPRS Architecture Protocols QoS EDGE UMTS Architecture Integrated Communication Systems
More information2G/3G Mobile Communication Systems
2G/3G Mobile Communication Systems Winter 2012/13 Integrated Communication Systems Group Ilmenau University of Technology Outline 2G Review: GSM Services Architecture Protocols Call setup Mobility management
More informationMobile Communications Chapter 4: Wireless Telecommunication Systems slides by Jochen Schiller with modifications by Emmanuel Agu
Mobile Communications Chapter 4: Wireless Telecommunication Systems slides by Jochen Schiller with modifications by Emmanuel Agu Market GSM Overview Services Sub-systems Components Prof. Dr.-Ing. Jochen
More informationWireless Telecommunication Systems GSM, GPRS, UMTS. GSM as basis of current systems Satellites and
Chapter 2 Technical Basics: Layer 1 Methods for Medium Access: Layer 2 Chapter 3 Wireless Networks: Bluetooth, WLAN, WirelessMAN, WirelessWAN Mobile Networks: Wireless Telecommunication Systems GSM, GPRS,
More informationIn this Lecture" Access method CDMA" Mobile and Sensor Systems Lecture 2: Mobile Medium Access Control Layer and Telecommunications
Mobile and Sensor Systems Lecture 2: Mobile Medium Access Control Layer and Telecommunications Dr. Cecilia Mascolo In this Lecture In this lecture we will discuss aspects related to the MAC Layer of wireless
More informationBölüm 8. GSM. 6 Milyar mobil telefon kullanıcısı (2011 sonu)* Dünya nüfusu 7 Milyar!
Bölüm 8. GSM http://ceng.gazi.edu.tr/~ozdemir Durum 6 Milyar mobil telefon kullanıcısı (2011 sonu)* Dünya nüfusu 7 Milyar! * http://www.itu.int/dms_pub/itu-d/opb/ind/d-ind-ictoi-2012-sum-pdf-e.pdf 1 Global
More information192620010 Mobile & Wireless Networking. Lecture 5: Cellular Systems (UMTS / LTE) (1/2) [Schiller, Section 4.4]
192620010 Mobile & Wireless Networking Lecture 5: Cellular Systems (UMTS / LTE) (1/2) [Schiller, Section 4.4] Geert Heijenk Outline of Lecture 5 Cellular Systems (UMTS / LTE) (1/2) q Evolution of cellular
More informationGlobal System for Mobile Communications (GSM)
Global System for Mobile Communications (GSM) Nguyen Thi Mai Trang LIP6/PHARE Thi-Mai-Trang.Nguyen@lip6.fr UPMC/PUF - M2 Networks - PTEL 1 Outline Principles of cellular networks GSM architecture Security
More informationMobile Communications Chapter 4: Wireless Telecommunication Systems
Mobile Communications Chapter 4: Wireless Telecommunication Systems Market GSM Overview Services Sub-systems Components GPRS DECT Not a part if this course! TETRA Not a part if this course! w-cdma (rel
More informationThe GSM and GPRS network T-110.300/301
The GSM and GPRS network T-110.300/301 History The successful analog 1:st generation mobile telephone systems proved that there is a market for mobile telephones ARP (AutoRadioPuhelin) in Finland NMT (Nordic
More informationMobile Computing. Basic Call Calling terminal Network Called terminal 10/25/14. Public Switched Telephone Network - PSTN. CSE 40814/60814 Fall 2014
Mobile Computing CSE 40814/60814 Fall 2014 Public Switched Telephone Network - PSTN Transit switch Transit switch Long distance network Transit switch Local switch Outgoing call Incoming call Local switch
More informationMobile Communications
October 21, 2009 Agenda Topic 2: Case Study: The GSM Network 1 GSM System General Architecture 2 GSM Access network. 3 Traffic Models for the Air interface 4 Models for the BSS design. 5 UMTS and the path
More informationGSM System. Global System for Mobile Communications
GSM System Global System for Mobile Communications Introduced in 1991. Settings of standards under ETSI (European Telecommunication Standards Institute) Services - Telephone services - Data services -
More informationGlobal System for Mobile Communication (GSM)
Global System for Mobile Communication (GSM) Li-Hsing Yen National University of Kaohsiung GSM System Architecture Um (ME/SIM) C E C PSTN, ISDN, PSPDN, CSPDN A-bis A F A-bis C B BTS BSS BSC HLR VLR EIR
More informationGSM and Similar Architectures Lesson 07 GSM Radio Interface, Data bursts and Interleaving
GSM and Similar Architectures Lesson 07 GSM Radio Interface, Data bursts and Interleaving 1 Space Division Multiple Access of the signals from the MSs A BTS with n directed antennae covers mobile stations
More informationCellular Network Organization
Cellular Networks Cellular Network Organization Use multiple low-power transmitters (100 W or less) Areas divided into cells o Each served by its own antenna o Served by base station consisting of transmitter,
More informationEvolution of GSM in to 2.5G and 3G
CMPE 477 Wireless and Mobile Networks Evolution of GSM in to 2.5G and 3G New Data Services for GSM CMPE 477 HSCSD GPRS 3G UMTS IMT2000 UMTS Architecture UTRAN Architecture Data services in GSM I Data transmission
More informationGlobal System for Mobile Communication Technology
Global System for Mobile Communication Technology Mobile Device Investigations Program Technical Operations Division DHS - FLETC GSM Technology Global System for Mobile Communication or Groupe Special
More informationWireless Cellular Networks: 1G and 2G
Wireless Cellular Networks: 1G and 2G Raj Jain Professor of Computer Science and Engineering Washington University in Saint Louis Saint Louis, MO 63130 Audio/Video recordings of this lecture are available
More informationGSM - Global System for Mobile Communications
GSM - Global System for Mobile Communications VLR BTS BSC GMSC PSTN MS HLR 1) Overview of GSM architecture 2) GSM channel structure 05-1 GSM - Global System for Mobile Communications VLR BTS BSC GMSC PSTN
More informationGSM GPRS. Course requirements: Understanding Telecommunications book by Ericsson (Part D PLMN) + supporting material (= these slides)
GSM Example of a PLMN (Public Land Mobile Network) At present most successful cellular mobile system (over 200 million subscribers worldwide) Digital (2 nd Generation) cellular mobile system operating
More information!!! "# $ % & & # ' (! ) * +, -!!. / " 0! 1 (!!! ' &! & & & ' ( 2 3 0-4 ' 3 ' Giuseppe Bianchi
!!! "# $ % & & # ' (! ) * +, -!!. / " 0! 1 (!!! ' &! & & & ' ( 2 3 0-4 ' 3 ' "#$!!% "&'! #&'!%! () *+,, 3 & 5 &,! #-!*! ' & '.! #%!* //!! & (0)/!&/, 6 5 /, "! First system: NMT-450 (Nordic Mobile Telephone)
More informationHandoff in GSM/GPRS Cellular Systems. Avi Freedman Hexagon System Engineering
Handoff in GSM/GPRS Cellular Systems Avi Freedman Hexagon System Engineering Outline GSM and GSM referemce model GPRS basics Handoffs GSM GPRS Location and Mobility Management Re-selection and routing
More informationLecture overview. History of cellular systems (1G) GSM introduction. Basic architecture of GSM system. Basic radio transmission parameters of GSM
Lecture overview History of cellular systems (1G) GSM introduction Basic architecture of GSM system Basic radio transmission parameters of GSM Analogue cellular systems 70 s In the early 70 s radio frequencies
More information3GPP Wireless Standard
3GPP Wireless Standard Shishir Pandey School of Technology and Computer Science TIFR, Mumbai April 10, 2009 Shishir Pandey (TIFR) 3GPP Wireless Standard April 10, 2009 1 / 23 3GPP Overview 3GPP : 3rd Generation
More informationWireless Access of GSM
Wireless Access of GSM Project Report FALL, 1999 Wireless Access of GSM Abstract: Global System for Mobile communications (GSM) started to be developed by Europeans when the removal of many European trade
More informationGSM Channels. Physical & Logical Channels. Traffic and Control Mutltiframing. Frame Structure
GSM Channels Physical & Logical Channels Traffic and Control Mutltiframing Frame Structure Engr. Mian Shahzad Iqbal Lecturer Department of Telecommunication Engineering Radio Interface The radio interface
More informationTelecommunication Systems (GSM) Mobile Communications (Ch 4) John Schiller, Addison-Wesley
Telecommunication Systems (GSM) Mobile Communications (Ch 4) John Schiller, Addison-Wesley 1 Telecommunication System Wireless extension of traditional PSTN Telephony architecture (NOT computer net) Many
More informationCellular Network Organization. Cellular Wireless Networks. Approaches to Cope with Increasing Capacity. Frequency Reuse
Cellular Network Organization Cellular Wireless Networks Use multiple low-power transmitters (100 W or less) Areas divided into cells Each served by its own antenna Served by base station consisting of
More informationMobile Services (ST 2010)
Mobile Services (ST 2010) Chapter 2: Mobile Networks Axel Küpper Service-centric Networking Deutsche Telekom Laboratories, TU Berlin 1 Mobile Services Summer Term 2010 2 Mobile Networks 2.1 Infrastructure
More informationGSM BASICS GSM HISTORY:
GSM BASICS GSM HISTORY: In 1982 the Nordic PTTs sent a proposal to CEPT (Conference of European Postal & telegraph Administration) to study and to improve digital cellular technology by forming a team
More informationThe Global System for Mobile communications (GSM) Overview
The Global System for Mobile communications (GSM) Overview GSM D-AMPS Japan Digital PCS 1900 DCS 1800 CDMA Digital Cellular Systems World-wide Multiple Access Techniques In the GSM/DCS mobile system each
More informationGSM Architecture and Interfaces
GSM.05 Page 71 Monday, November 30, 1998 2:07 PM C H A P T E R 5 GSM Architecture and Interfaces 5.1 INTRODUCTION In this chapter we present an overview of the GSM as described in ETSI s recommendations.
More informationWireless Mobile Telephony
Wireless Mobile Telephony The Ohio State University Columbus, OH 43210 Durresi@cis.ohio-state.edu http://www.cis.ohio-state.edu/~durresi/ 1 Overview Why wireless mobile telephony? First Generation, Analog
More informationGlobal System for Mobile Communication (GSM)
Global System for Mobile Communication (GSM) Definition Global system for mobile communication (GSM) is a globally accepted standard for digital cellular communication. GSM is the name of a standardization
More informationCh 2.3.3 GSM PENN. Magda El Zarki - Tcom 510 - Spring 98
Ch 2.3.3 GSM In the early 80 s the European community decided to work together to define a cellular system that would permit full roaming in all countries and give the network providers freedom to provide
More informationTheory and Practice. IT-Security: GSM Location System Syslog XP 3.7. Mobile Communication. December 18, 2001. GSM Location System Syslog XP 3.
Participant: Hack contacting... IT-Security: Theory and Practice Mobile Communication December 18, 2001 Uwe Jendricke uwe@iig.uni-freiburg.de Lecture Homepage: http://www.informatik.uni-freiburg.de/~softech/teaching/ws01/itsec/
More information-The equipment was limited to operate only within the boundaries of each country. -The market for each mo bile equipment was limited.
1 History of GSM During the early 1980s, analog cellular telephone systems were experienced a very fast growth in Europe, particularly in Scandinavia and the United Kingdom, but also in France and Germany.
More informationGlobal System for Mobile (GSM) Global System for Mobile (GSM)
Global System for Mobile (GSM) David Tipper Associate Professor Graduate Program of Telecommunications and Networking University of Pittsburgh Telcom 2720 Slides 8 Based largely on material from Jochen
More informationEE 4105 Communication Engg-II Dr. Mostafa Zaman Chowdhury Slide # 1
EE 4105 Communication Engg-II Dr. Mostafa Zaman Chowdhury Slide # 1 1 Circuit-Switched Systems In a circuit-switched system, each traffic channel is dedicated to a user until its cell is terminated. Circuit
More informationMobile Wireless Overview
Mobile Wireless Overview A fast-paced technological transition is occurring today in the world of internetworking. This transition is marked by the convergence of the telecommunications infrastructure
More informationAnalysis of GSM Network for Different Transmission Powers
Analysis of GSM Network for Different Transmission Powers Mandeep Singh 1, Supreet Kaur 2 1,2 (Department of Electronics and Communication Engineering, Punjabi University, Patiala, India) Abstract: To
More informationGSM: PHYSICAL & LOGICAL CHANNELS
GSM: PHYSICAL & LOGICAL CHANNELS AN OVERVIEW Prepared by Learntelecom.com 1. GSM: PHYSICAL AND LOGICAL CHANNELS GSM uses a mix of Frequency Division Multiple Access (FDMA) and Time Division Multiple Access
More informationAuthentication and Secure Communication in GSM, GPRS, and UMTS Using Asymmetric Cryptography
ISSN (Online): 1694-0784 ISSN (Print): 1694-0814 10 Authentication and Secure Communication in GSM, GPRS, and UMTS Using Asymmetric Cryptography Wilayat Khan 1 and Habib Ullah 2 1 Department of Electrical
More informationChapter 6 Wireless and Mobile Networks
Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see the animations;
More informationGSM Architecture Training Document
Training Document TC Finland Nokia Networks Oy 1 (20) The information in this document is subject to change without notice and describes only the product defined in the introduction of this documentation.
More informationMobility and cellular networks
Mobility and cellular s Wireless WANs Cellular radio and PCS s Wireless data s Satellite links and s Mobility, etc.- 2 Cellular s First generation: initially debuted in Japan in 1979, analog transmission
More informationHow To Improve Data Rates For Global Evolution (Edge)
EDGE: Enhanced Data Rates for GSM Evolution SIDDARTH WANDRE ID: 999-29-3194 CS 548: Broadband Networks ILLINOIS INSTITUTE OF TECHNOLOGY Abstract:- This paper gives an overview of the EDGE concept. It gives
More informationCellular Phone Systems
Cellular Phone Systems Li-Hsing Yen National University of Kaohsiung Cellular System HLR PSTN MSC MSC VLR BSC BSC BSC 1 Why Cellular Mobile Telephone Systems? Operational limitations of conventional mobile
More informationEDGE: The Introduction of High Speed Data in GSM / GPRS Networks
10 September 2003 EDGE: The Introduction of High Speed Data in GSM / GPRS Networks Wendy Florence Ericsson South Africa Rev A 10 September 2003 1 Agenda What is EDGE? Implementing EDGE Network and transmission
More information1. Introduction: The Evolution of Mobile Telephone Systems
IEC: The Global System for Mobile Communication Tutorial: Index Page 1 of 14 Global System for Mobile Communication (GSM) Tutorial Definition Global System for Mobile Communication (GSM) is a globally
More informationMRN 6 GSM part 1. Politecnico di Milano Facoltà di Ingegneria dell Informazione. Mobile Radio Networks Prof. Antonio Capone
Politecnico di Milano Facoltà di Ingegneria dell Informazione MRN 6 GSM part 1 Mobile Radio Networks Prof. Antonio Capone A. Capone: Mobile Radio Networks 1 General characteristics of the system A. Capone:
More informationMobile Services (ST 2010)
Mobile Services (ST 2010) Chapter 3: Mobility Management Axel Küpper Service-centric Networking Deutsche Telekom Laboratories, TU Berlin 1 Mobile Services Summer Term 2010 3 Mobility Management 3.1 Handover
More information1G to 4G. Overview. Presentation By Rajeev Bansal Director(Mobile-1) Telecommunication Engineering Centre
1G to 4G Overview Presentation By Rajeev Bansal Director(Mobile-1) Telecommunication Engineering Centre Mobile Networks differentiated from each other by the word Generation 1G, 2G, 2.5G, 2.75G, 3G milestones
More informationCellular Technology Sections 6.4 & 6.7
Overview Cellular Technology Sections 6. & 6.7 CSC 9 December, 0 Cellular architecture evolution Cellular telephony and internet terminology Mobility for cellular mobiles 6- Components of cellular architecture
More informationGSM v. CDMA: Technical Comparison of M2M Technologies
GSM v. CDMA: Technical Comparison of M2M Technologies Introduction Aeris provides network and data analytics services for Machine-to- Machine ( M2M ) and Internet of Things ( IoT ) applications using multiple
More informationPradipta Biswas Roll No. 04IT6007 M. Tech. (IT) School of Information Technology Indian Institute of Technology, Kharagpur
Pradipta Biswas Roll No. 04IT6007 M. Tech. (IT) School of Information Technology Indian Institute of Technology, Kharagpur ABSTRACT W-CDMA (Wideband Code-Division Multiple Access), an ITU standard derived
More information2 System introduction
2 System introduction Objectives After this chapter the student will: be able to describe the different nodes in a GSM network. be able to describe geographical subdivision of a GSM network. be able to
More informationMobile Devices Security: Evolving Threat Profile of Mobile Networks
Mobile Devices Security: Evolving Threat Profile of Mobile Networks SESSION ID: MBS-T07 Anand R. Prasad, Dr.,ir., Selim Aissi, PhD Objectives Introduction Mobile Network Security Cybersecurity Implications
More informationHow To Make A Cell Phone Network More Efficient
Cellular Network Planning and Optimization Part V: GSM Jyri Hämäläinen, Communications and Networking Department, TKK, 18.1.2008 GSM Briefly 2 General GSM was the first digital cellular system. GSM was
More informationALCATEL CRC Antwerpen Fr. Wellesplein 1 B-2018 Antwerpen +32/3/240.8550; Suresh.Leroy@alcatel.be +32/3/240.7830; Guy.Reyniers@alcatel.
Contact: ALCATEL CRC Antwerpen Fr. Wellesplein 1 B-2018 Antwerpen +32/3/240.8550; Suresh.Leroy@alcatel.be +32/3/240.7830; Guy.Reyniers@alcatel.be Voice over (Vo) was developed at some universities to diminish
More informationEETS 8316 Wireless Networks Fall 2013
EETS 8316 Wireless Networks Fall 2013 Lecture: Cellular Overview: 3G and 4G http://lyle.smu.edu/~skangude/eets8316.html Dr. Shantanu Kangude skangude@lyle.smu.edu Third Generation Systems High-speed wireless
More informationRESOURCE ALLOCATION FOR INTERACTIVE TRAFFIC CLASS OVER GPRS
RESOURCE ALLOCATION FOR INTERACTIVE TRAFFIC CLASS OVER GPRS Edward Nowicki and John Murphy 1 ABSTRACT The General Packet Radio Service (GPRS) is a new bearer service for GSM that greatly simplify wireless
More informationModule 5. Broadcast Communication Networks. Version 2 CSE IIT, Kharagpur
Module 5 Broadcast Communication Networks Lesson 9 Cellular Telephone Networks Specific Instructional Objectives At the end of this lesson, the student will be able to: Explain the operation of Cellular
More informationCS263: Wireless Communications and Sensor Networks
CS263: Wireless Communications and Sensor Networks Matt Welsh Lecture 4: Medium Access Control October 5, 2004 2004 Matt Welsh Harvard University 1 Today's Lecture Medium Access Control Schemes: FDMA TDMA
More informationIndian Journal of Advances in Computer & Information Engineering Volume.1 Number.1 January-June 2013, pp.1-5 @ Academic Research Journals.
Cellular System Rajat Chugh, Parag Jasoria, Tushar Arora, Nitin Ginotra and Vivek Anand V Semester, Department of Computer Science and Engineering, Dronacharya College of Engineering, Khentawas, Farukhnagar,
More informationPDF vytvořeno zkušební verzí pdffactory www.fineprint.cz UMTS
UMTS Generations of mobile systems Generation 1 (1980-1995) 2 (1992-2000) 2,5 (1999-2010) 3 (2004-20?) Names NMT (Nordic Mobile Telephone); 450 MHz, 900 MHz AMPS (Advance Mobile Telephone System); USA
More informationRoadmap for Establishing Interoperability of Heterogeneous Cellular Network Technologies -3-
Roadmap for Establishing Interoperability of Heterogeneous Cellular Network Technologies -3- Hasni Neji Innov COM Lab, Higher School of Communications of Tunis, Sup Com University of Carthage, Tunis, Tunisia
More informationCS 8803 - Cellular and Mobile Network Security: GSM - In Detail
CS 8803 - Cellular and Mobile Network Security: GSM - In Detail Professor Patrick Traynor 9/27/12 Cellular Telecommunications Architecture Background Air Interfaces Network Protocols Application: Messaging
More informationIntroduction to Cellular Networks: 1G/2G/3G
Introduction to Cellular Networks: 1G/2G/3G Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 Jain@cse.wustl.edu Audio/Video recordings of this class lecture are available at: 14-1 Overview
More informationWireless Cellular Networks: 3G
Wireless Cellular Networks: 3G Raj Jain Washington University Saint Louis, MO 63131 Jain@cse.wustl.edu These slides are available on-line at: http://www.cse.wustl.edu/~jain/cse574-06/ 7-1 Overview Wireless
More informationGSM System Architecture
Intersystem Operation and Mobility Management David Tipper Associate Professor Graduate Program in Telecommunications and Networking University it of Pittsburgh Telcom 2700 Slides 6 http://www.tele.pitt.edu/tipper.html
More informationFrequency [MHz] ! " # $ %& &'( " Use top & bottom as additional guard. guard band. Giuseppe Bianchi DOWNLINK BS MS 890.4 UPLINK MS BS 890.2.
Frequency [MHz] 960 DOWNLINK BS MS 935 915 UPLINK MS BS 890 890.4 890.2 guard band Use top & bottom as additional guard! " # $ %& &'( " 1 2 3 4 5 6 7 8 F F uplink dwlink ( n) = [ 890.2 + 0.2( n 1) ] (
More informationChapter 3: WLAN-GPRS Integration for Next-Generation Mobile Data Networks
Chapter 3: WLAN-GPRS Integration for Next-Generation Mobile Data Networks IEEE Wireless Communication, Oct. 2002 Prof. Yuh-Shyan Chen Department of Computer Science and Information Engineering National
More informationData Services in GSM HSCSD GPRS. GPRS Infrastructure Components
4 4 Data Services in Data transmission in with only 9.6 kbit/s Advanced channel coding allows 14.4 kbit/s Still not enough for Internet access or even multimedia applications Thus: UMTS as 3G network :
More information1 Introduction to mobile telecommunications
1 Introduction to mobile telecommunications Mobile phones were first introduced in the early 1980s. In the succeeding years, the underlying technology has gone through three phases, known as generations.
More informationSupplementary material: Digital Enhanced Cordless Telecommunications (DECT)
Supplementary material: Digital Enhanced Cordless Telecommunications (DECT) 1.1 Introduction 1.1.1 History Analog cordless phones came into use in the early 1980s. They enabled communications between handsets
More information2G Cellular Data Networks
1 2 General Mobility Issues 2G Cellular Data Networks Registration and Authentication User Locate local service provider access point Obtain network access Service provider Locate mobile user within network
More informationGSM Network Architecture, Channelisation, Signalling and Call Processing
GSM Network Architecture, Channelisation, Signalling and Call Processing Dr Bhaskar Ramamurthi Professor Department of Electrical Engineering IIT Madras Dr Bhaskar Ramamurthi GSM 1 Call Routing in Wireline
More informationLTE Overview October 6, 2011
LTE Overview October 6, 2011 Robert Barringer Enterprise Architect AT&T Proprietary (Internal Use Only) Not for use or disclosure outside the AT&T companies except under written agreement LTE Long Term
More informationVoice services over Adaptive Multi-user Orthogonal Sub channels An Insight
TEC Voice services over Adaptive Multi-user Orthogonal Sub channels An Insight HP 4/15/2013 A powerful software upgrade leverages quaternary modulation and MIMO techniques to improve network efficiency
More informationGSM Radio Part 1: Physical Channel Structure
GSM Radio Part 1: Physical Channel Structure 1 FREQUENCY BANDS AND CHANNELS...2 2 GSM TDMA...4 3 TDMA FRAME HIERARCHY...6 4 BURST STRUCTURE...7 5 TDMA MULTIFRAME STRUCTURE...9 5.1 Traffic Multiframe (26-Multiframe)...10
More informationProduct Description. HiLink E3531 HSPA+ USB Stick V100R001 HUAWEI TECHNOLOGIES CO., LTD. Issue 01. Date 2013-6-13
HiLink E3531 HSPA+ USB Stick V100R001 Issue 01 Date 2013-6-13 HUAWEI TECHNOLOGIES CO., LTD. Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. Please feel
More informationGSM Air Interface & Network Planning
GSM Air Interface & Network Planning Training Document TC Finland Nokia Networks Oy 1 (40) GSM Air Interface & Network Planning The information in this document is subject to change without notice and
More informationUMTS/GPRS system overview from an IP addressing perspective. David Kessens Jonne Soininen
UMTS/GPRS system overview from an IP addressing perspective David Kessens Jonne Soininen Introduction 1) Introduction to 3GPP networks (GPRS, UMTS) Technical overview and concepts for 3GPP networks Mobility
More informationWireless systems GSM 2015-05-04. Simon Sörman
Wireless systems GSM 2015-05-04 Simon Sörman Contents 1 Introduction... 1 2 Channels... 2 2.1 Physical channels... 2 2.1.1 FDMA/TDMA... 2 2.1.2 Bursts... 3 2.2 Logical channels... 3 2.3 Mapping of logical
More informationRBS 6000 Training Programs. Catalog of Course Descriptions
RBS 6000 Training Programs Catalog of Course Descriptions Page 2 2 Telephone: +46 8 757 0000 Page 3 Catalog of Course Descriptions INTRODUCTION... 5 GSM RADIO NETWORK OVERVIEW... 7 WCDMA RADIO ACCESS NETWORK
More informationGSM Network and Services
GSM Network and Services GPRS - sharing of resources 1 What is the problem? Many data applications are very bursty in its traffic pattern: http, smtp, pop, telnet,... Why reserve physical resources at
More informationIntroduction to EDGE. 2.1 What Is EDGE?
2 Introduction to EDGE This chapter is the first of a series dedicated to EDGE. It introduces the different EDGE concepts from a global point of view, explaining how they have been introduced into the
More informationImplementation of Mobile Measurement-based Frequency Planning in GSM
Implementation of Mobile Measurement-based Frequency Planning in GSM Comp.Eng. Serkan Kayacan (*), Prof. Levent Toker (**) (*): Ege University, The Institute of Science, Computer Engineering, M.S. Student
More informationMobile Communications TCS 455
Mobile Communications TCS 455 Dr. Prapun Suksompong prapun@siit.tu.ac.th Lecture 26 1 Office Hours: BKD 3601-7 Tuesday 14:00-16:00 Thursday 9:30-11:30 Announcements Read the following from the SIIT online
More informationVehicle Theft Intimation Using GSM
ISSN (e): 2250 3005 Vol, 04 Issue, 8 August 2014 International Journal of Computational Engineering Research (IJCER) Vehicle Theft Intimation Using GSM 1, Minakshi Kumari, 2, Prof. Manoj Singh 1, 2, Computer
More informationSolution for Non-Repudiation in GSM WAP Applications
Solution for Non-Repudiation in GSM WAP Applications CRISTIAN TOMA, MARIUS POPA, CATALIN BOJA Economic Informatics Department Academy of Economic Studies Romana Square No. 6, Bucharest ROMANIA cristian.toma@ie.ase.ro
More informationDimensioning and Deployment of GSM Networks
Case Study: Dimensioning and Deployment of GSM Networks Acknowledgement: some of these slides are based on originals and information kindly provided by Ian O Shea of Altobridge Ltd. 2011 1 GSM System Architecture
More informationLong-Term Evolution. Mobile Telecommunications Networks WMNet Lab
Long-Term Evolution Mobile Telecommunications Networks WMNet Lab Background Long-Term Evolution Define a new packet-only wideband radio with flat architecture as part of 3GPP radio technology family 2004:
More informationWhat is telecommunication? electronic communications. service?
What is telecommunication? Telecommunication: Any transmission, emission or reception of signs, signals, writing, images and sounds or intelligence of any nature by wire, radio, optical or other electromagnetic
More informationDevelopment of Wireless Networks
Development of Wireless Networks Cellular Revolution In 1990 mobile phone users populate 11 million. By 2004 the figure will become 1 billion Phones are most obvious sign of the success of wireless technology.
More informationWhat is telecommunication? electronic communications? What is telephony?
What is telecommunication? Telecommunication: Any transmission, emission or reception of signs, signals, writing, images and sounds or intelligence of any nature by wire, radio, optical or other electromagnetic
More informationAppendix C GSM System and Modulation Description
C1 Appendix C GSM System and Modulation Description C1. Parameters included in the modelling In the modelling the number of mobiles and their positioning with respect to the wired device needs to be taken
More informationCopyright. GSM - Phase 2+ From GSM to GPRS. From GSM to GPRS. Motivations. General Packet Radio Service (GPRS) HSCSD EDGE GPRS
Copyright HSCSD EDGE GPRS GSM - Phase 2+ Quest opera è protetta dalla licenza Creative Commons NoDerivs-NonCommercial. Per vedere una copia di questa licenza, consultare: http://creativecommons.org/licenses/nd-nc/1.0/
More information