We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byLuke Clay
Modified over 3 years ago
Maximilian Riegel Kommunikationsnetz Franken e.V. access-by-gsm.ppt-1 ( ) 2001 © Maximilian Riegel Internet Access by GSM & GPRS At the end of the wired universe...
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-2 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS Prolog When you like m slow links m expensive connection fees m complicated installation and configuration m... just like you have done it 94 & 95 in the wired Internet then you are right here: Welcome back into the future!
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-3 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS Outline o GSM system overview o Circuit switched data o Internet access over GSM o High Speed Circuit Switched Data o GPRS system overview o Comparison of CSD, HSCSD and GPRS o Links
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-4 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS GSM (Global System for Mobile communications) o GSM standard was adopted by ETSI in 1991 o Now used in countries by about 400 mio users o Benefits: m Support for international roaming m Distinction between user and device identification m Excellent speech quality m Wide range of services m Interworking (e.g. with ISDN, DECT) m Extensive security features o Services: m Telephony m Asynchronous and synchronous data services (2.4/4.8/9.6 kbit/s) m Access to packet data network (X.25) m Telematic services (SMS, fax, videotext, etc.) m Many value-added features (call forwarding, caller ID, voice mailbox)
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-5 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS GSM system architecture PLMN Public Land Mobile Network BTS Base Transceiver Station BSC Base Station Controller MSC Mobile Switching Center PSTN Plain Standard Telefon Network HLR Home Location Register VLR Visited Location Register AUC Authentication Center EIR Equipment Identity Register IN Intelligent Network PSTN (ISDN) PLMN access TDM AUCHLRVLR IN BTS BSC BTS MSC BSC BTS MSC PLMN core EIR
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-6 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS GSM radio interface o One channel transfers 114 information bits / time slots One channel occupies 24 time slots / 120ms One channel has a raw data rate of 22,8 kbit/s (full rate) o Half a channel might be used for one connection (half rate) o The bearer service for data communication provides 9,6 kbit/s o GSM900 Up: MHz Down: MHz o GSM1800 Up: MHz Down: MHz o GSM1900 Up: MHz Down: MHz
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-7 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS GSM CSD (Circuit Switched Data) non-transparent o Most widely used: non-transparent data rate of 9.6 kbit/s. m Error correction and flow control ("non-transparent) m RTT is typically around 0.5s (GSM1800) and 1s (GSM900) o Non-transparent mode utilises a special GSM network-based error correction facility called "Radio Link Protocol" (RLP) that ensures more robust transmission. o Transmitter gets an acknowledgement from the receiver that data has been error-free received. o "forward correction" technique is used to ensure uninterrupted data transmission throughout. o Call can be started on V.110 (link a ISDN data call; fast set-up) or on V.32.( like in a PSTN modem; slow set-up). o RLP causes a small additional delay.
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-8 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS GSM CSD (Circuit Switched Data) transparent o No GSM error correction supplied over the air interface. o Standard for G3 fax transmission is a transparent protocol. o Most GSM networks support both non transparent and transparent data communications. o Can be started on V.110 (link a ISDN data call) or on V.32.( like in a PSTN modem). o Transparent mode causes only minimal delay but does not guarantee error free transmission. Real time requirements are better fulfilled by transparent mode.
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-9 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS Configuration: CSD AT Strings o For ISDN connection use the following initialisation strings: AT+CBST=71,0,1 (for most newer handsets) o The +CBST string is defined as "select bearer service type" in GSM The full definition is: AT+CBST=,, Meaning 0autobauding V V V34 (HSCSD 1 timeslot) V34 (HSCSD 2 timeslots) V34 (HSCSD 2 timeslots) V V110 (HSCSD 1 timeslot V110 (HSCSD 2 timeslots) V110 (HSCSD 2 timeslots Meaning 0data circuit asynchronous 1data circuit synchronous Meaning 0transparent 1non-transparent 2both, transparent preferred 3both, non-transparent preferred
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-10 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS Mobile Internet access in Germany T-D1D2-private-plusViag Interkom Phone number Username will be provided after sign up dont Passworddont careemptyinternet Cost per minute [DM] (22-06) 0.39 (06-22) 0.19 (18-09) 0.39 (09-18) 0.29 o More economic connection fees might be possible by local dial-in numbers (http://www.holpert.de/christian/internet-by-call/Ortstarif.html)http://www.holpert.de/christian/internet-by-call/Ortstarif.html o Most MNOs provide direct dial-in numbers for other online-services. o Most mobile phones are equipped with modem functionality o Connection to the computer might be realized by cable or IrDA o Getting mobile internet access needs just the configuration of a new internet connection on the computer.
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-11 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS HSCSD (High Speed Circuit Switched Data) o Maximum user data rate per GSM time slot 14.4 kbit/s m New coding scheme with less error protection capabilities m 14.4 kbit/s bearer not possible at GSM900 o Up to four time slots can be allocated for one data call. o Both, 9.6 kbit/s and 14.4 kbit/s bearers, can be used. m max kbit/s with 9.6 kbit/s bearer m max kbit/s with 14.4 kbit/s bearer o Non-transparent service: m Number of timeslots can be changed during the call m Asymmetric allocation possible o Transparent service: m Fixed number of timeslots during a particular call o Simple upgrade of existing GSM networks
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-12 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS Configuration: HSCSD AT Strings o The most common HSCSD configurations are: m AT+CHSN=2,1,1,8want single slot 14k4 m AT+CHSN=2,1,1,12 want single slot 14k4 but will accept 9k6 m AT+CHSN=4,2,2,8 want double slot 28k8 m AT+CHSN=4,2,2,12 want double slot 28k8 but will accept 19k2 o The actual format of the command is defined in GSM07.07 as: AT+CHSN=,,, and are the wanted and maximum number of receive timeslots. =0: the handset should calculate the correct value from and. =0: the handset will not request a change in timeslots allocated during the call. Meaning 0 0 default - take speed from AT+CBST Meaning full rate data traffic timeslot full rate data traffic timeslot full rate data traffic timeslot These values are additive, e.g. 12 means 9600 or are acceptable
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-13 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS GPRS (General Packet Radio Service) o Designed for bursty data traffic m Stays connected without wasting radio resources m introduction of packet switching to the GSM network m Reuse of the GSM radio network infrastructure m Multi slot combining traffic technology for bandwidth-on-demand o Up to 4 (theoretically 8) timeslots for uplink and downlink o 4 different coding schemes CS with different capacities. m Capacity ranges from 9.05 kbit/s (CS 1) to 21.4 kbit/s (CS 4) m Theoretical maximum speed is 21.4 x 8 = kbit/s o Dynamic option of GPRS: m GSM voice traffic is prioritised m Packet switched data traffic only on timeslots not in use for voice => Reuse of otherwise wasted bandwidth
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-14 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS GPRS: dynamic allocation of time-slots
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-15 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS GPRS system architecture SGSN (Serving GPRS Support Node) o Packet data handler towards BSC providing authentication, mobility management, logical link management, packet routing and transfer o Interworking with the HLR and the GPRS packet control unit located in the BSC or a BTS. PSTN (ISDN) PLMN access TDM SGSN IN BTS BSC BTS MSC BSC BTS MSC PLMN core GGSN Internet AUCHLRVLREIR GGSN (Gateway GPRS Support Node) o Interworking function with external packet data networks. o Acting as an access server o Setting up the logical link to the mobile station through the SGSN. o Translation of data formats and signalling protocols
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-16 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS Bandwidth - delay comparison CSDHSCSDGPRS Bandwidth (Up / Down) [kbit/s] 9.6 / / / 57.6 CS1: 9.05 / 36.2 CS2: 13.4 / 53.6 CS3: 15.6 / 62.4 CS4: 21.4 / 85.6 Delay 1s (GSM900) 0.5s (GSM1800) QoS class 1: 128B: mean 0.5s (95% 1.5s) 1kB: mean 2s (95% 7s) QoS class 2: 128B: mean 5s (95% 25s) 1kB: mean 15s (95% 75s) QoS class 3: 128B: mean 50s (95% 250s) 1kB: mean 75s (95% 375s)
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-17 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS Mobile Networks are expensive *based on current IP volume prices of 40 /GByte. Time based pricing results in similar costs, e.g. MobileStar Pulsar pricing plan: $0,10/min logarithmic scale -99,6% Transfer cost/duration of an 1 Mbytes.ppt/.doc/.xls File... 4 min 5 sec
Kommunikationsnetz Franken e.V. access-by-gsm.ppt-18 ( ) 2001 © Maximilian Riegel Internet via GSM & GPRS Links o Internet-Zugang aus den Mobilfunknetzen o Internet zum Ortstarif o Going online with the communicator (also very informative for non-Nokia Communication users) Mit Laptop und Handy ins Internet o Overview of the Global System for Mobile Communications o Mobilfunk FAQs
(c) Introduction to PLMN (c) Manzur Ashraf 1 Introduction to Public Land Mobile Network (PLMN) © Manzur Ashraf.
GPRS 1. Before GPRS: HSCSD HSCSD or High Speed Circuit Switched Data was the first upgrade to be standardized by ETSI to bring high speed data to GSM.
NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI TECHNICAL SEMINAR PRESENTATION Presented by NISHITH RANJAN SAHOO Roll no:
Comparative Study on GSM,GPRS & CDMA Technology. INTRODUCTION GSM is a mobile telephony network based on the cellular concept. Users can place and receive.
1 Lecture 19 EEE 441 Wireless And Mobile Communications.
GSM infrastructure MSC, BSC, BTS, VLR, HLR, GSGN, GSSN Johan Montelius
Telefónica Móviles España GPRS (General Packet Radio Service)
1 Wireless Networks Lecture 17 GPRS: General Packet Radio Service (Part I) Dr. Ghalib A. Shah.
1 © NOKIA FILENAMs.PPT/ DATE / NN Nokia 30 technical specification.
Communication Protocol Engineering Lab. Hyoung Joo. Nam. 1 GSM System Overview Wireless and Mobile Network Architecture Nam Hyoung-Joo
Mobile Cellular Networks Evolution –1st generation, 1980s analogue voice –2nd generation 1990s digital Voice, fax data 95% coverage of UK by 1991 –3rd.
Lectured By: Vivek Dimri Assistant Professor, CSE Dept. SET, Sharda University, Gr. Noida.
Mobile Handset Cellular Network Basics + GSM. Cellular Network Basics There are many types of cellular services; before delving into details, focus on.
© Sunrise GSM Data evolution EDGE GSM HSCSD services upto 38.4 kbit/s (later up to 64 kbit/s) PDS services low bit rates GSM GPRS services upto.
Media Gateway 1 Mika Ahola Media Gateway Mika Ahola Mobile Switching Systems Unit, L M Ericsson in Finland.
1 General Packet Radio Service (GPRS) Adapted from a presentation by Miao Lu Nancy Samaan SITE, Ottawa.
GSM Adapted from Acoe 422. History of GSM During the 80s, analog cellular systems experienced rapid growth in Europe, yet they were incompatible.
Mobile Communication MMS / GPRS. What is GPRS ? General Packet Radio Service (GPRS) is a new bearer service for GSM that greatly improves and simplifies.
The Wireless Communication System Xihan Lu. Wireless Communication Cellular phone system Cordless telephone system Bluetooth Infrared communication Microwave.
Presentation by Papua New Guinea Telecommunication & Radiocommunication Technical Authority (PANGTEL) For: PNG COMPUTER SOCIETY ANNUAL SEMINAR, 4 th November.
General Packet Radio Service. GPRS GPRS is a packet-based data bearer service for GSM and TDMA networks. GPRS gives mobile users faster data speeds and.
General Packet Radio System (GPRS) Overview. Introduction General Packet Radio Service (GRPS) today “Packet overlay” network on top of the existing GSM.
GSM – formerly: Groupe Spéciale Mobile (founded 1982) – now: Global System for Mobile Communication – Pan-European standard (ETSI, European Telecommunications.
Presentation on GSM Network. GSM-Introduction Architecture Technical Specifications Frame Structure Channels Security Characteristics and features Applications.
Cellular Network Base stations transmit to and receive from mobiles at the assigned spectrum – Multiple base stations use the same spectrum The service.
1 Lecture 20 EEE 441 Wireless And Mobile Communications.
GPRS Muhammad Al-khaldi Sultan Al-Khaldi
GPRS General Packet Radio Service Shay Toder – Ori Matalon The Department of Communication System Engineering Ben-Gurion University June 19, 2002.
GSM TOWARDS LTE NETWORKS Lecture # 3 SUBSCRIBER IDENIFIERS SIM MSISDN IMEI IMSI.
1 Chapter One Introduction to Computer Networks and Data Communications.
1 UNIT I (Contd..) High-Speed LANs. 2 Introduction Fast Ethernet and Gigabit Ethernet Fast Ethernet and Gigabit Ethernet Fibre Channel Fibre Channel High-speed.
By Neha choudhary Asst.Professor CSE/IT LHST-A. GSM-Introduction Architecture Technical Specifications Characteristics and features Applications.
Thema: Menü Ansicht, Master, Folien-Master 1 ITU - IP Telephony Workshop June Standards for IP-telephony P.A.Probst, External Relations Swisscom.
DECT Tom Jongsma. Contents History of DECT DECT = Digital Enhanced Cordless Telecommunications First release of the standard in 1992 Designed for short-range.
Global System for Mobile Communications (GSM) is a second generation (2G) cellular standard developed to cater voice services and data delivery using.
GSM: The European Standard for Mobile Telephony Presented by Rattan Muradia Requirement for course CSI 5171 Presented by Rattan Muradia Requirement for.
NSK 200 GSM Secure Telephone, NSK 201 DECT Single Base Station and NSK 250 Secure Management Centre (NDLO/CIS)
Mobile Communications: Wireless Telecommunication Systems Market GSM Overview Services Sub-systems Components.
Mobile Computing - Unit II. UNIT - II Introduction: The analog mobile systems were originally targeted for a relatively select group of users who mostly.
Mobile IP. 2 N+I_2k © 2000, Peter Tomsu 02_mobile_ip Evolution of Data Services Mobile IP GSM GPRS CDMA Other Cellular Circuit Switched Data Today Packet.
MULTIMEDIA ENGINEERING ISE (International School of Engineering, CU) Information and Communication Engineering 4 2.5G Mobile Phone and Network.
4.1 Architecture of the GSM system GSM is a PLMN (Public Land Mobile Network) – several providers setup mobile networks following the GSM standard within.
Doc.: IEEE xxx Submission May 10-14, 2004 Alan Carlton, Interdigital CommunicationsSlide 1 Defining Layer 2.5 Alan Carlton Interdigital Communications.
GSM System Architecture BSC MSC MS BTS GMSC PSTN ISDN PDN EIR AUC HLR VLR.
Maciej Stasiak, Mariusz Głąbowski Arkadiusz Wiśniewski, Piotr Zwierzykowski Modeling and Dimensioning of Mobile Networks: from GSM to LTE.
CDMA Power Control, Smart Antenna. Power Control in CDMA All the mobiles communicate on the same frequency. Therefore, internal interference is developed.
Ασύρματα Δίκτυα και Κινητές Επικοινωνίες Ενότητα # 8: Σύστημα 2.5 Γενιάς GPRS Διδάσκων: Βασίλειος Σύρης Τμήμα: Πληροφορικής.
2/7/01 DRAFT Confidential & Proprietary Information, Copyright 2001, Symmetry Communications Systems p. 1 GPRS.
Joint ITU/ECA Regional Workshop on Information and Communication Technologies (ICT) Indicators Gaborone, Botswana October 2004
TETRA ARCHITECTURE AND INTERFACES Dr. M. Nouri New Technologies Senior Manager Marconi Mobile.
© 2017 SlidePlayer.com Inc. All rights reserved.