GSM System. Global System for Mobile Communications

Size: px
Start display at page:

Download "GSM System. Global System for Mobile Communications"

Transcription

1 GSM System Global System for Mobile Communications Introduced in Settings of standards under ETSI (European Telecommunication Standards Institute) Services - Telephone services - Data services - Short message paging System Architecture : three major subsystems. Network and Switching Subsystem (NSS) : 1. MSCs, Visitor Location Register (VLR), Home Location Register (HLR), Authentication Center (AUC) and Equipment Identity Register (EIR). 2. Switching of GSM calls between external networks and the BSCs. 3. Managing and providing external access to several customer databases, such as HLR : contains subscriber information (International Mobile Subscriber Identity -IMSI) and location information for each user who resides in the same city as the MSC. VLR : temporarily stores the IMSI and customer information for each roaming subscriber who is visiting the coverage area of a particular MSC. Once a roaming mobile is logged in the VLR, the MSC sends the necessary information to the visiting subscriber s HLR so that calls to the roaming mobile can be appropriately routed over the PSTN by the roaming user s HLR. AUC : Strongly protected database which handles the authentication and encryption keys for every single subscriber in the HLR and VLR. Radio Subsystem (Base Station Subsystem BSS): 1. Mobile stations (MS), Base Transceiver Station (BTS) and the Base Station Controller (BSC) 2. Provides and manages radio transmission paths between the MS and MSC. 3. One BSC controls up to several hundred BTSs. Institute for Infocomm Research 184 Institute for Infocomm Research 185

2 4. BSC performs handover for MS under the control of same BSC. Operation Support Subsystem (OSS) 1. Support the operation and maintenance of GSM and allows system engineers to monitor, diagnose and troubleshoot all aspects of the GSM system. 2. Interacts with the other GSM subsystems. 3. Charging and billing. Frequency domain The frequency band for uplink (reverse) is MHz, downlink (forward) is MHz. Interface TDMA/FDMA/FDD - Uses both TDMA and FDMA to transmit and recover information. Systems are FDD. - The bandwidth for the GSM system is 25MHz, which provides 125 carriers uplink/downlink each having a bandwidth of 200 khz. The ARFCN (Absolute radio frequency channel numbers) denotes a forward and reverse channel pair which is separated in frequency by 45 MHz. Base-to-mobile : F u ( n) = ( n 1) MHz Mobile-to-base : Fd ( n) = Fu ( n) + 45 MHz - In practical implementations, a guard band of 100kHz is provided at the upper and lower end of the GSM spectrum, and only 124 (duplex) channels are implemented. Institute for Infocomm Research 186 Institute for Infocomm Research 187

3 There are a total of eight channels per carrier. Every eighth timeslot on a TDMA channel, the user transmits or receives his information. A second frequency band from MHz and MHz (three times as much as primary 900 MHz) are also specified in 1990, a total of 374 duplex channels DCS 1800 GSM has chosen the four-cell repeat pattern for the frequency reuse cell sets. In most cases, each cell is divided into 120-deg sectors, with three base transceiver subsystems in each cell. Each base transceiver has a 120-deg antenna. - These 12 sectors (called cells in GSM system) share the 124 channels. Institute for Infocomm Research 188 Institute for Infocomm Research 189

4 Time domain RF carrier channel is time division multiple accessed by users at different locations within a cell site. - Frame duration is 4.615ms, and each frame consists of 8 time-slots. - Each of the time-slot is a traffic channel having time duration 0.577ms (3/5200s). - The start of an uplink TDMA frame is delayed with respect to downlink by three timeslots. Staggering TDMA frames allows the same timeslot number (TN) to be used in both directions. Multiframe 26 frames (traffic or speech ~): Traffic CHannel (TCH), Slow Associated Control CHannel (SACCH), Fast Associated Control CHannel (FACCH). 51 frames (control ~) : Broadcast Common Control (BCC), Stand Alone Dedicated Control Channels,.. Superframe : 51 traffic multiframes or 26 control multiframes. Hyperframe : 2048 superframes (3 hrs 28 min s), to support encryption with high security and frequency hopping. Physical Channel : specified by ARFCN and TN. Logical Channel : is mapped onto the physical channel. E.g, TCHs and control channels. Institute for Infocomm Research 190 Institute for Infocomm Research 191

5 Traffic Channel (TCH) : - Traffic channels carry digitally encoded user speech or user data. Have identical functions and formats on both the forward and reverse link. - Full rate : user data is contained within one TS per frame. Half rate : user data is mapped onto the same time slot, but is sent in alternate frames. TCH/FS : Full rate speech, raw data sent at 13kbps, with GSM channel coding 22.8kbps. TCH/HS : Half rate speech, raw data sent at 6.5kbps, with GSM channel coding 11.4kbps. TCH/F9.6 : Full raw data rate 9.6kbps, send at 22.8kbps. TCH/F4.8 TCH/F2.4 TCH/H4.8 TCH/H2.4 - TCH data may not be sent in TS0 within a TDMA frame on certain ARFCNs which serve as the broadcast station (control burst) for every frame. Furthermore, frames of TCH data are broken up every thirteenth frame by SACCH or idle frame. Traffic or speech multiframe Control multiframe Institute for Infocomm Research 192 Institute for Infocomm Research 193

6 Control (Signaling) Channels : Three types : Broadcast CHannel (BCH) Common Control CHannel (CCCH) Dedicated Control CHannel (DCCH) Broadcast channel (BCH) site. Due to higher distance resulting in large propagation delay, the transmitted signal of mobile 1 during TS1 reaches the BS later. If no action is taken, this will overlap with other transmission slots. The only solution is that the MS advances its emission relative to its reception by a time corresponding to and from propagation delay. This value is call the timing advance. The timing advance value can be computed by the BTS and is then provided to the MS through signaling. The maximum timing advance of 233us (6 bits data) is adequate for MS to be up to 35 km from the BS, which is the maximum allowable cell radius of the GSM systems. Only on downlink Three types of BCH Broadcast control channel (BCCH) 1. Broadcast cell and network information 2. Cell and network identity 3. List of channels in use Frequency correction channel (FCCH) 1. Occupies TS0 of first frame 2. Repeated every 10th frame within a control channel multiframe 3. Synchronization of local oscillator (radio frequency) to base station oscillator. Synchronization channel (SCH) 1. Broadcast in TS0 immediately following a FCCH frame. 2. Allows for frame synchronization 3. Base station issues timing advancement commands. Assume that the mobile 2 was allocated TS2 and he is close to the BS and that mobile 1 has been allocated TS1 and is at the boundary of the cell Common control channel (CCCH) Occupies TS0 of every control frame not used by BCH or the Idle Frame. 3 different CCCH types Paging channel (PCH) 1. Provides paging signals from base to mobiles. 2. Notifies specific mobile of incoming call Random access channel (RACH) 1. Uplink channel 2. Used by mobiles to acknowledge page from PCH 3. Used by mobiles to originate a call Access grant channel (AGCH) 1. Provides forward link communication to mobile. 2. Specifies time slot, radio channel and dedicated control channel. 3. AGCH is final CCCH message before mobile is moved off the control channel. Institute for Infocomm Research 194 Institute for Infocomm Research 195

7 Dedicated control channel (DCCH) Bidirectional channels with same format and function on uplink and downlink. May exist in any time slot and on any radio channel except TS0 of the control radio channel. 3 different DCCH are specified. Stand-alone dedicated control channel (SDCCH) 1. Carries signaling data following the connection of the mobile with BS. 2. Intermediate and temporary channel which accepts a newly completed call from the BCH and holds the traffic while accepts a newly completed call from the BCH and holds the traffic while waiting for the BS to allocate a TCH channel. 3. Ensures that mobile and base remains connected during authentication and resource allocation. 4. Maybe assigned their own physical channel or may occupy TS0 of the BCH if there is low demand for BCH or CCCH traffic. Slow associated control channel (SACCH) 1. Always associated with a traffic channel 2. On downlink the SACCH carries power control and timing advance instruction 3. On uplink the SACCH carriers signal strength and quality information 4. SACCH is allocated every 13th frame of a traffic channel. Fast associated control channel (FACCH) 1. Carries urgent messages to the mobile, for example handover. 2. FACCH gains access by stealing frames from TCH (e.g. data transmission slot are stolen). Example : Mobile to PSTN GSM Set-up - Synchronize to nearest BTS by monitoring BCH. - Dial intended number - Burst of RACH data - BTS responds with AGCH message on CCCH and assigns the mobile a new channel for SDCCH connection. - The MS listens to the SACCH frame to get timing advance and power control info. - MS sends authentication and validation requests. - MS is instructed by the BTS over the SDCCH to retune to new radio channel and TS for TCH assignment. Time slot data bursts take on one of the 5 formats according to the logical channel. A normal burst consists of 148 bits Guardtime of 8.25 bits to avoid frame overlap. Two batched of 57 bits are information bits Institute for Infocomm Research 196 Institute for Infocomm Research 197

8 26 training bits for equalization. There are three cases of handover, Two stealing bits for FACCH (1) From one radio channel to another of the same BSC. (2) Between channel of different BSCs under the control of the same MSC. (3) Between different MSCs in the same licensed operator. Between different licensed operators there are no procedure. There are two modes of handover : (1) Synchronous : the old and new cells are synchronized so that their TDMA timeslots start at exactly the same time. Mobile-Assisted handover There are four purposes for handover (1) rescue low-quality channel (2) recovering cochannel interference (3) traffic balancing among cells (avoid congestion or load balancing) directed handover. (4) recovering in the event of failure of a control channel (2) Asynchronous : this may lead to a longer interruption of communication during handover since MS has to re-initialize timing advance at the new cell. By repetitively monitoring the SCHs of all the surrounding cells between transmission and reception of traffic bursts, the MS can compute beforehand the timing advances required for all surrounding cells. The MS is then presynchronized with any such cell to which it may be handed. This speeds up the handover process. Institute for Infocomm Research 198 Institute for Infocomm Research 199

9 Speech coding Channel coding data channels Full rate 22.8kbps : The output bits of the speech coder are ordered into groups for error protection, based upon their significance in contributing to speech quality. Out of the total 260 bits in a frame, The most important 50 bits, called type Ia bits, have 3 parity check (CRC) bits added to them. The next 132 bits along with the first 53 are reordered and appended by 4 trailing zero bits, and then encoded for error protection using a rate ½ convolutional encoder with constraint length K=5. The least important 78 bits do not have any error protection. - The GSM speech coder is based on the Residually Excited Linear Predictor (RELP) - Enhanced by a long term predictor (LTP) - The coder provides 260 speech codec bits for each 20ms, ie. The speech codec bit rate is 13 kbps. - 40% average voice activity exploited by a discontinuous transmission mode. A voice activity detector (VAD) is used in the speech coder off the transmitter for power saving. - Half rate codec works at 6.5 kbps. Institute for Infocomm Research 200 Institute for Infocomm Research 201

10 For TCH/F.9.6, Channel coding control channel - GSM Control channel messages are defined to be 184 bits long, and are encoded using a shortened binary cyclic fire code, followed by a half-rate convolutional coder. - The fire codes uses the generator polynomial G5 ( x) = ( x + 1)( x + x + 1) = x + x + x + x + x + 1 which produces 184 message bits, followed by 40 parity bits. - Four tail bits are added to clear the convolutional coder which follows, yielding a 228 bits per block. - This block is applied to a half-rate K=5 convolutional code using the generator polynomials G 0( x) = 1+ x + x and G 1( x) = 1+ x + x + x (same as type Ia TCH). The resulting 456 encoded bits are interleaved onto eight consecutive frames in the same manner as TCH speech data. Institute for Infocomm Research 202 Institute for Infocomm Research 203

11 Modulation 0.3 GMSK. The channel data rate of GSM is kbps Interleaving - To minimize the effect of sudden fades on the received data, the total of 456 encoded bits within each 20 ms speech frame or control message frame are broken into eight 57 bit sub-blocks. These 8 subblocks which make up a single speech frame are spread over eight consecutive TCH time slots. - If a burst is lost due to interference or fading, interleaved data will help to spread the effect over a few error-correction-frames. Hopefully channel coding ensures that enough bits will still be received correctly. Institute for Infocomm Research 204 Institute for Infocomm Research 205

12 Frequency hopping Verify the following: - Under normal conditions, each data burst belonging to a particular physical channel is transmitted using the same carrier frequency. - If users in a particular cell have severe multipath problems, the cell may be defined as a hopping cell by the network operator. - Frequency hopping is carried out on a frame-byframe basis, thus hopping occurs at a maximum rate of hops per second (1/ frame rate). As many as 64 different channels may be used before a hopping sequence is repeated. Apparent bandwidth efficiency GSM bit rate = kbps, bandwidth = 200kHz Bandwidth efficiency = bs/hz The speech codec rate for each time slot = 456b/20ms (=22.8kbps). Each voice channel actually allocated for /8 = kbps. Number of bits/slot = x4.615 = bits ( guard time) For each TDMA slot in each frame, 114 bits are transmitted, and only 24 data frames per 26 frames are transmitting, therefore the vocoder output rate = 114/ x 24/26 = 22.8kbps However, of the 114 data bits in a slot, only 65 are raw speech codec bits Raw data rate = 22.8*65/114=13 kbps Or 65 bits in 20ms = 13 kbps Institute for Infocomm Research 206 Institute for Infocomm Research 207

GSM Channels. Physical & Logical Channels. Traffic and Control Mutltiframing. Frame Structure

GSM 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 information

GSM LOGICAL CHANNELS

GSM LOGICAL CHANNELS GSM LOGICAL CHANNELS There are two types of GSM logical channels 1. Traffic Channels (TCHs) 2. Control Channels (CCHs) Traffic channels carry digitally encoded user speech or user data and have identical

More information

GSM: PHYSICAL & LOGICAL CHANNELS

GSM: 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 information

Global System for Mobile Communication (GSM)

Global 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 information

GSM - Global System for Mobile Communications

GSM - 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 information

Frequency [MHz] ! " # $ %& &'( " Use top & bottom as additional guard. guard band. Giuseppe Bianchi DOWNLINK BS MS 890.4 UPLINK MS BS 890.2.

Frequency [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 information

GSM 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 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 information

GSM GSM 05.01 TECHNICAL May 1996 SPECIFICATION Version 5.0.0

GSM GSM 05.01 TECHNICAL May 1996 SPECIFICATION Version 5.0.0 GSM GSM 05.01 TECHNICAL May 1996 SPECIFICATION Version 5.0.0 Source: ETSI TC-SMG Reference: TS/SMG-020501Q ICS: 33.060.50 Key words: Digital cellular telecommunications system, Global System for Mobile

More information

-The equipment was limited to operate only within the boundaries of each country. -The market for each mo bile equipment was limited.

-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 information

Global System for Mobile Communications (GSM)

Global 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 information

GSM BASICS GSM HISTORY:

GSM 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 information

GSM Radio Part 1: Physical Channel Structure

GSM 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 information

Wireless Cellular Networks: 1G and 2G

Wireless 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 information

GSM Air Interface & Network Planning

GSM 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 information

Ch 2.3.3 GSM PENN. Magda El Zarki - Tcom 510 - Spring 98

Ch 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 information

Cellular Network Organization. Cellular Wireless Networks. Approaches to Cope with Increasing Capacity. Frequency Reuse

Cellular 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 information

Wireless systems GSM 2015-05-04. Simon Sörman

Wireless 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 information

Appendix C GSM System and Modulation Description

Appendix 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 information

Cellular Network Planning and Optimization Part V: GSM. Jyri Hämäläinen, Communications and Networking Department, TKK, 18.1.2008

Cellular Network Planning and Optimization Part V: GSM. Jyri Hämäläinen, Communications and Networking Department, TKK, 18.1.2008 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 information

MRN 6 GSM part 1. Politecnico di Milano Facoltà di Ingegneria dell Informazione. Mobile Radio Networks Prof. Antonio Capone

MRN 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 information

The Global System for Mobile communications (GSM) Overview

The 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 information

Mobile Network Evolution Part 1. GSM and UMTS

Mobile Network Evolution Part 1. GSM and UMTS 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 information

GSM GPRS. Course requirements: Understanding Telecommunications book by Ericsson (Part D PLMN) + supporting material (= these slides)

GSM 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

GSM GSM 05.02 TECHNICAL May 1996 SPECIFICATION Version 5.0.0

GSM GSM 05.02 TECHNICAL May 1996 SPECIFICATION Version 5.0.0 GSM GSM 05.02 TECHNICAL May 1996 SPECIFICATION Version 5.0.0 Source: ETSI TC-SMG Reference: TS/SMG-020502Q ICS: 33.060.50 Key words: Digital cellular telecommunications system, Global System for Mobile

More information

The GSM and GPRS network T-110.300/301

The 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 information

GSM Network Architecture, Channelisation, Signalling and Call Processing

GSM 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 information

Mobile Communications Chapter 4: Wireless Telecommunication Systems

Mobile 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 information

Lecture 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 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 information

9.1 Introduction. 9.2 Roaming

9.1 Introduction. 9.2 Roaming 9 Location Updating Objectives After this chapter the student will: be able to define the concepts of roaming and location updating. be able to name the different types of location updating and why they

More information

Implementation of Mobile Measurement-based Frequency Planning in GSM

Implementation 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 information

GSM Architecture and Interfaces

GSM 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 information

GSM GSM 05.08 TECHNICAL July 1996 SPECIFICATION Version 5.1.0

GSM GSM 05.08 TECHNICAL July 1996 SPECIFICATION Version 5.1.0 GSM GSM 05.08 TECHNICAL July 1996 SPECIFICATION Version 5.1.0 Source: ETSI TC-SMG Reference: TS/SMG-020508QR ICS: 33.060.50 Key words: Digital cellular telecommunications system, Global System for Mobile

More information

Global System for Mobile (GSM) Global System for Mobile (GSM)

Global 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 information

CS 8803 - Cellular and Mobile Network Security: GSM - In Detail

CS 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 information

RELEASE NOTE. Recc)mmendation GSM 05.08. Previously distributed version :3.7.0 ( Updated Release 1/90

RELEASE NOTE. Recc)mmendation GSM 05.08. Previously distributed version :3.7.0 ( Updated Release 1/90 ETSI /TC SMG Release by : ETSI /PT 12 Release date : December 1995 RELEASE NOTE Recc)mmendation GSM 05.08 Radio Sub - system Link Control Previously distributed version :3.7.0 ( Updated Release 1/90 New

More information

Telecommunication Systems (GSM) Mobile Communications (Ch 4) John Schiller, Addison-Wesley

Telecommunication 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 information

2G/3G Mobile Communication Systems

2G/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 information

Global System for Mobile Communication (GSM)

Global 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 information

Mobile Communications

Mobile 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 information

Cellular Network Organization

Cellular 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 information

CS 8803 - Cellular and Mobile Network Security: CDMA/UMTS Air Interface

CS 8803 - Cellular and Mobile Network Security: CDMA/UMTS Air Interface CS 8803 - Cellular and Mobile Network Security: CDMA/UMTS Air Interface Hank Carter Professor Patrick Traynor 10/4/2012 UMTS and CDMA 3G technology - major change from GSM (TDMA) Based on techniques originally

More information

Wireless Telecommunication Systems GSM, GPRS, UMTS. GSM as basis of current systems Satellites and

Wireless 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 information

Module 5. Broadcast Communication Networks. Version 2 CSE IIT, Kharagpur

Module 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 information

CS263: Wireless Communications and Sensor Networks

CS263: 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 information

2G Mobile Communication Systems

2G Mobile Communication Systems 2G Mobile Communication Systems 2G Review: GSM Services Architecture Protocols Call setup Mobility management Security HSCSD GPRS EDGE References Jochen Schiller: Mobile Communications (German and English),

More information

PART 4 GSM Radio Interface

PART 4 GSM Radio Interface PRT 4 GSM Radio Interface Lecture 4. Physical channels Frequency [MHz] 960 OWNLINK BS MS 95 95 UPLINK MS BS 890 GSM Radio Spectrum 890.4 890.2 guard band 2 x 25 Mhz band uplex spacing: 45 MHz 24 carriers

More information

Roadmap for Establishing Interoperability of Heterogeneous Cellular Network Technologies -3-

Roadmap 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 information

Mobile 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 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 information

Chapter 10 ( PART-1) Existing Wireless Systems

Chapter 10 ( PART-1) Existing Wireless Systems Chapter 10 ( PART-1) Existing Wireless Systems 1 Outline AMPS IS-41 GSM PCS 2 AMPS 3 AMPS (Advanced Mobile Phone System) Design goals of AMPS Characteristics of AMPS Channel usage in AMPS AMPS frequency

More information

Global System for Mobile Communication Technology

Global 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 information

1. Introduction: The Evolution of Mobile Telephone Systems

1. 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 information

G S M C E L L B R O A D C A S T S E RV I C E S E C U R I T Y A N A LY S I S. arturo cedillo torres

G S M C E L L B R O A D C A S T S E RV I C E S E C U R I T Y A N A LY S I S. arturo cedillo torres G S M C E L L B R O A D C A S T S E RV I C E S E C U R I T Y A N A LY S I S arturo cedillo torres Department of Mathematics and Computer Science Eindhoven University of Technology Supervisors: Nicola Zannone

More information

192620010 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] 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 information

Wireless Mobile Telephony

Wireless 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 information

Exercise 2 Common Fundamentals: Multiple Access

Exercise 2 Common Fundamentals: Multiple Access Exercise 2 Common Fundamentals: Multiple Access Problem 1: TDMA, guard time. To set up a GSM-connection, the base station (BTS) and the mobile station (MS) use the following short access burst in a TDMA-slot

More information

Using TEMS Pocket. Johan Montelius

Using TEMS Pocket. Johan Montelius Using TEMS Pocket Johan Montelius Introduction In this laboration you will get acquainted with the TEMS Pocket tool. You will examine both the Monaco network and a commercial network. Since this is your

More information

A brief Overview of the GSM Radio Interface. Thierry Turletti. Massachussets Institute of Technology. March 1, 1996. Abstract

A brief Overview of the GSM Radio Interface. Thierry Turletti. Massachussets Institute of Technology. March 1, 1996. Abstract A brief Overview of the GSM Radio Interface Thierry Turletti Telemedia Networks and Systems Group Laboratory for Computer Science Massachussets Institute of Technology turletti@lcs.mit.edu March 1, 1996

More information

PW1 Monitoring a GSM network with a trace mobile

PW1 Monitoring a GSM network with a trace mobile LPRO WireLess Network and security PW1 Monitoring a GSM network with a trace mobile Module GSM MOBILE LPRO 2012-13 Experimental set-up: 1. SAGEM OT230/OT260 Trace Mobile and charger 2. GSM antenna and

More information

GSM VOICE CAPACITY EVOLUTION WITH VAMOS Strategic White Paper

GSM VOICE CAPACITY EVOLUTION WITH VAMOS Strategic White Paper GSM VOICE CAPACITY EVOLUTION WITH VAMOS Strategic White Paper Table of contents VAMOS increases your GSM voice capacity at minimum investment / 1 Take the full benefit of VAMOS / 1 Standard aspects / 1

More information

Dimensioning, configuration and deployment of Radio Access Networks. Lecture 2.1: Voice in GSM

Dimensioning, configuration and deployment of Radio Access Networks. Lecture 2.1: Voice in GSM Dimensioning, configuration and deployment of Radio Access Networks. Lecture.: Voice in GSM GSM Specified by ETSI Frequency Division Duplex TDMA system Originally at 900MHz, but today also at 800, 800,

More information

Multiple Access Techniques

Multiple Access Techniques Multiple Access Techniques Dr. Francis LAU Dr. Francis CM Lau, Associate Professor, EIE, PolyU Content Introduction Frequency Division Multiple Access Time Division Multiple Access Code Division Multiple

More information

GSM Architecture Training Document

GSM 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 information

GSM Network and Services

GSM Network and Services GSM Network and Services Cellular networks GSM Network and Services 2G1723 Johan Montelius 1 The name of the game The number one priority for mobile/cellular networks is to implement full-duplex voice

More information

Basic Goals of Networking

Basic Goals of Networking Cellular Network Basic Goals of Networking Call management Call setup Call termination Different Service: voice over IP, call forwarding, 2 Basic Goals of Networking User Information Transport Modulation

More information

9 Wireless Telephone Service

9 Wireless Telephone Service 9 Wireless Telephone Service Introduction Wireless cellular mobile telephone service is a high-capacity system for providing direct-dial telephone service to automobiles, and other forms of portable telephones,

More information

Lecture 1. Introduction to Wireless Communications 1

Lecture 1. Introduction to Wireless Communications 1 896960 Introduction to Algorithmic Wireless Communications Lecture 1. Introduction to Wireless Communications 1 David Amzallag 2 May 25, 2008 Introduction to cellular telephone systems. How a cellular

More information

Revision of Lecture Eighteen

Revision of Lecture Eighteen Revision of Lecture Eighteen Previous lecture has discussed equalisation using Viterbi algorithm: Note similarity with channel decoding using maximum likelihood sequence estimation principle It also discusses

More information

EDGE: Enhanced Data Rates for GSM Evolution

EDGE: Enhanced Data Rates for GSM Evolution 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 information

Positioning in GSM. Date: 14th March 2003

Positioning in GSM. Date: 14th March 2003 Positioning in GSM Date: 14th March 2003 Overview of seminar Potential applications in cellular network Review of localization system and techniques Localization in GSM system Progress of the project with

More information

Cellular Telephone Systems

Cellular Telephone Systems CELLULAR TELEPHONE SYSTEMS First- Generation Analog Cellular Telephone, Personal Communications system, Second- Generation, N-AMPS, Digital Cellular Telephone, Interim Standard, North American Cellular

More information

8. Cellular Systems. 1. Bell System Technical Journal, Vol. 58, no. 1, Jan 1979. 2. R. Steele, Mobile Communications, Pentech House, 1992.

8. Cellular Systems. 1. Bell System Technical Journal, Vol. 58, no. 1, Jan 1979. 2. R. Steele, Mobile Communications, Pentech House, 1992. 8. Cellular Systems References 1. Bell System Technical Journal, Vol. 58, no. 1, Jan 1979. 2. R. Steele, Mobile Communications, Pentech House, 1992. 3. G. Calhoun, Digital Cellular Radio, Artech House,

More information

Mobile Computing. Basic Call Calling terminal Network Called terminal 10/25/14. Public Switched Telephone Network - PSTN. CSE 40814/60814 Fall 2014

Mobile 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 information

Yu.M. Tulyakov, D.Ye. Shakarov, A.A. Kalashnikov. Keywords: Data broadcasting, cellular mobile systems, WCDMA, GSM.

Yu.M. Tulyakov, D.Ye. Shakarov, A.A. Kalashnikov. Keywords: Data broadcasting, cellular mobile systems, WCDMA, GSM. Аnalysis of data broadcasting in modern cellular mobile systems of ground radio communications Yu.M. Tulyakov, D.Ye. Shakarov, A.A. Kalashnikov At the analysis of channel formation in WCDMA networks the

More information

3GPP Wireless Standard

3GPP 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 information

In this Lecture" Access method CDMA" Mobile and Sensor Systems Lecture 2: Mobile Medium Access Control Layer and Telecommunications

In 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 information

Voice services over Adaptive Multi-user Orthogonal Sub channels An Insight

Voice 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 information

NETWORK AND RF PLANNING

NETWORK AND RF PLANNING NETWORK AND RF PLANNING Introduction Achieving maximum capacity while maintaining an acceptable grade of service and good speech quality is the main issue for the network planning. Planning an immature

More information

# DEFINITIONS TERMS. A standard cellular telephone service (CTS) initially placed into operation on Oct. 13, 1983.

# DEFINITIONS TERMS. A standard cellular telephone service (CTS) initially placed into operation on Oct. 13, 1983. CHAPTER 20 CELLULAR TELEPHONE SYSTEM # DEFINITIONS TERMS 1) Stands for Standard Cellular Telephone Service CTS 2) An acronym for Personal Communications System. PCS 3) Stands for Personal Communications

More information

Hello viewers, welcome to today s lecture on cellular telephone systems.

Hello viewers, welcome to today s lecture on cellular telephone systems. Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture minus 31 Cellular Telephone Systems Hello viewers, welcome to today s lecture

More information

Dimensioning and Deployment of GSM Networks

Dimensioning 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 information

Integration of Open-Source GSM Networks

Integration of Open-Source GSM Networks Integration of Open-Source GSM Networks Thomas A. Cooper Thesis submitted to the faculty of the Virginia Polytechnic Institute and State University in partial fulfillment of the requirements for the degree

More information

ETSI TS 100 912 V8.4.0 (2000-08)

ETSI TS 100 912 V8.4.0 (2000-08) TS 100 912 V8.4.0 (2000-08) Technical Specification Digital cellular telecommunications system (Phase 2+); Radio subsystem synchronization (GSM 05.10 version 8.4.0 Release 1999) GLOBAL SYSTEM FOR MOBILE

More information

!!! "# $ % & & # ' (! ) * +, -!!. / " 0! 1 (!!! ' &! & & & ' ( 2 3 0-4 ' 3 ' Giuseppe Bianchi

!!! # $ % & & # ' (! ) * +, -!!. /  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 information

CDMA Network Planning

CDMA Network Planning CDMA Network Planning by AWE Communications GmbH www.awe-com.com Contents Motivation Overview Network Planning Module Air Interface Cell Load Interference Network Simulation Simulation Results by AWE Communications

More information

NAVAL POSTGRADUATE SCHOOL THESIS

NAVAL POSTGRADUATE SCHOOL THESIS NAVAL POSTGRADUATE SCHOOL MONTEREY, CALIFORNIA THESIS SOFTWARE-DEFINED RADIO GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS TRANSMITTER DEVELOPMENT FOR HETEROGENEOUS NETWORK VULNERABILITY TESTING by Carson C.

More information

GSM GSM 05.05 TECHNICAL March 1996 SPECIFICATION Version 5.0.0

GSM GSM 05.05 TECHNICAL March 1996 SPECIFICATION Version 5.0.0 GSM GSM 05.05 TECHNICAL March 1996 SPECIFICATION Version 5.0.0 Source: ETSI TC-SMG Reference: TS/SMG-020505Q ICS: 33.060.50 Key words: Digital cellular telecommunications system, Global System for Mobile

More information

RADIUS. Brief brochure. Product Purpose

RADIUS. Brief brochure. Product Purpose Product Purpose The Product is designed for searching, intercepting, registering and analyzing of communication sessions as well as service information circulating in cellular GSM networks without encryption

More information

Evolution of GSM in to 2.5G and 3G

Evolution 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 information

Indian Journal of Advances in Computer & Information Engineering Volume.1 Number.1 January-June 2013, pp.1-5 @ Academic Research Journals.

Indian 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 information

Mobile Wireless Overview

Mobile 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 information

Pradipta 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 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 information

Evaluating GSM A5/1 security on hopping channels

Evaluating GSM A5/1 security on hopping channels Evaluating GSM A5/1 security on hopping channels Bogdan Diaconescu v1.0 This paper is a practical approach on evaluating A5/1 stream cipher on a GSM hopping network air interface called Um. The end goal

More information

Optimization. Log File Analysis GSM

Optimization. Log File Analysis GSM Optimization and Log File Analysis in GSM by Somer GOKSEL January 26, 2003 2 Contents 1 INTRODUCTION...04 1.1 PURPOSE and SCOPE of OPTIMIZATION... 04 1.2 OPTIMIZATION PROCESS... 05 1.2.1 PROBLEM ANALYSIS...

More information

MASTER'S THESIS. Improved Power Control for GSM/EDGE

MASTER'S THESIS. Improved Power Control for GSM/EDGE MASTER'S THESIS 2005:238 CIV Improved Power Control for GSM/EDGE Fredrik Hägglund Luleå University of Technology MSc Programmes in Engineering Department of Computer Science and Electrical Engineering

More information

Analysis of GSM Network for Different Transmission Powers

Analysis 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 information

EPL 657 Wireless Networks

EPL 657 Wireless Networks EPL 657 Wireless Networks Some fundamentals: Multiplexing / Multiple Access / Duplex Infrastructure vs Infrastructureless Panayiotis Kolios Recall: The big picture... Modulations: some basics 2 Multiplexing

More information

Multiple Access Techniques

Multiple Access Techniques Chapter 8 Multiple Access Techniques Multiple access techniques are used to allow a large number of mobile users to share the allocated spectrum in the most efficient manner. As the spectrum is limited,

More information

The Network Layer Layer 3

The Network Layer Layer 3 CHAPTER 7 The Network Layer Layer 3 Now it is time to hijack the GSM freight train, to see what is inside, to break into the time-slotted boxcars and spill the drums of unknown acids and solvents on the

More information

Pocket Guide for Fundamentals and GSM Testing

Pocket Guide for Fundamentals and GSM Testing Pocket Guide for Fundamentals and GSM Testing Publisher: Author: Wandel & Goltermann GmbH & Co Elektronische Meûtechnik P. O. Box 12 62 D-72795 Eningen u.a. Germany e-mail: solutions@wg.com http://www.wg.com

More information

Cellular Communications

Cellular Communications Definition Cellular Communications A cellular mobile communications system uses a large number of low-power wireless transmitters to create cells the basic geographic service area of a wireless communications

More information