PART 4 GSM Radio Interface

Size: px
Start display at page:

Download "PART 4 GSM Radio Interface"

Transcription

1 PRT 4 GSM Radio Interface Lecture 4. Physical channels Frequency [MHz] 960 OWNLINK BS MS UPLINK MS BS 890 GSM Radio Spectrum guard band 2 x 25 Mhz band uplex spacing: 45 MHz 24 carriers x band 200 KHz channels Suggested use: only 22 Use top & bottom as additional guard 8 TM slots x carrier full rate calls Kbps If half-rate used, 6 calls at 6.5 kbps F F uplink dwlink ( n) = [ ( n ) ] ( n) = ( n ) MHz [ ]MHz

2 djacent channels (due to GMSK) 60dB 5dB Specification: 9dB In practice, due to power control and shadowing, adjacent channels Cannot be used within the same cell Physical channel 200 KHz bandwidth + GMSK modulation 625/6 kbps gross channel rate (270.8 kbps) time slot = 625/4 bits bits 5/26 ms = µs time slot 0 time slot 7 time 577 µs frame = 60/ ms = 4.65 ms 26 frames = 20 ms (this is the key number) 2

3 Hybrid FM-TM physical channel = (time slot, frequency) frequency Total n. of channels: KHz 200 KHz 200 KHz 200 KHz 200 KHz 200 KHz 200 KHz 200 KHz 200 KHz slot 577us 577us 577us 577us 577us 577us 577us 577us time CS 800 radio spectrum Greater bandwidth available EUROPE: 75 MHz band MHz uplink; MHz downlink ITLY: 45 MHz band from MHz uplink; MHz downlink Same GSM specification 200 KHz carriers total of 74 carriers (versus24 in GSM) CS 800 operators Common rule in most of the countries: First and second 900 MHz; Third MHz CS 800 deployment (996+):» 5 MHz (=75 carriers) to Wind; 7.5 (=7 carriers) to first and second operator (plus existing 27 GSM 900 carriers)

4 Other GSM bands Extended GSM (E-GSM) band Uplink: MHz ownlink: MHz Other bands: 450 MHz ( up; down) 480 MHz ( up; down) 900 MHz ( up; MHz) uplexing - MS uses SME slot number on uplink and downlink - Uplink and downlink carriers always have a 45 MHz separation -I.e. if uplink carrier is downlink is slot delay shift!! OWNLINK UPLINK MS: no need to transmit and receive in the same time on two different frequencies! 4

5 f7 f6 f5 f4 f f2 f Slow Frequency hopping (optional procedure within individual cell) Hopping sequence (example): f f2 f5 f6 f f7 f4 f Slow = on a per-frame basis - hop per frame (4.65 ms) = 27 hops/second Physical motivation: - combat frequency-selective fading - combat Co-Channel Interference next slot may not interferere with adjacent cell slot (different hopping sequence) - improvements: acceptable quality with 9 db SNR versus db Structure of a TM slot TB T 57 Normal burst S Training sequence 26 Symmetric structure T: 2 x 57 data bits 4 data bits per burst gross bits (error-protected; channel coded) gross rate: 24 traffic burst every 26 frames (20 ms) 22.8 kbps gross rate kbps net rate! S: 2 x stealing bit lso called stealing flags, toggle bits Needed to grab slot for FCCH (other signalling possible) S ata bit burst bit (5/26 ms = ms) TB GP

6 Tail & training bits 2 x TB = tail bits set to 000 t start and end of frame Leave time available for transmission power ramp-up/down ssures that Viterbi decoding starts and ends at known state 26 bit training sequence Known bit pattern (8 Training Sequence Code available) for channel estimation and synchronization Why in the middle? Because channel estimate reliable ONLY when the radio channel sounding is taken! Multipath fading rapidly changes the channel impulse response Training sequences ifferent codes used in adjacent cells! voids training sequence isruption because of co-channel interference. 6

7 Power mask for Normal Burst 7.6 bits 4.9 bits bits; 62.2 bits Guard Period rationale d BTS ssume the following synchro mechanism: BTS transmits at time 0 MS receives at time d/c MS transmits at time +d/c BTS receives at time + 2d/c BTS downlink tx 2 4 MS downlink rx MS uplink rx 2 4 Offset depending on d! BTS uplink rx Expected RX time! 7

8 Guard period sizing dwlink slot dwlink slot 4 dwlink slot dwlink slot 4 MS time uplink slot BTS time uplink slot Maximum cell radius: GT C 2d = c c GT d = 2C bits bits 4. 5 rate rate Is there something wrong? (GSM says that cells go up to 5 km) Km Frame synchronization BTS T (transmitted in the SCCH) Timing dvance (T) Parameter periodically transmitted by BTS during MS activity 6 bits = 0-6 Meaning: anticipate transmission of T bits BTS time T=0: no advance I.e. transmit after bits after downlink slot T=6: Transmit after bits time T dwlink slot 4 dwlink slot 4 uplink slot uplink slot uplink slot T avoids collision! MS time 8

9 Timing dvance analysis ownlink propagation delay: d/c Uplink propagation delay: d/c Uplink delay with T: d/c-t Perfect resynchronization occurs when T = 2d/c Maximum cell size for perfect resync: [ bits] [ bits / s] T.5 d = c = [ km / s] = 4. [ km] 8.25 bits Guard time additionally available for imperfect sync (+/- error) nd when the user is not connected? But wants to connect Solution: USE IFFERENT BURST FORMT ccess Burst: much longer Guard Period available drawback: much less space for useful information TB 8 Training sequence 4 ccess burst ata 6 TB GP bit burst bit (0.577 ms) No collision with subsequent slot for distances up to 7.8 km 9

10 Other burst formats in GSM 5 different bursts available Normal Burst ccess Burst Frequency Correction Burst Synchronization Burst ummy Burst Frequency Correction Burst Frequency Correction Burst TB Fixed bit pattern (all 0s) 42 TB GP 8.25 ll 0s burst (TB=0, too) fter GMSK modulation: Sine wave at f reference +625/24 khz ( khz) cts as a beacon When an MS is searching to detect the presence of a carrier llows an MS to keep in sync with reference frequency 0

11 ummy Burst TB Fixed bit pattern 58 ummy Burst Training sequence 26 Fixed bit pattern 58 TB GP 8.25 Used to fill inactive bursts on the BCCH Guarantees more power on BCCH than that on other channels Important, when MS needs to find BCCH TB Synchronization Burst Sync data 9 Synchronization Burst Training sequence 64 Longer training sequence It is the first burst an MS needs to demodulate! single training sequence ata field: Contains all the information to synchronize the frame i.e. synchronize frame counter Contains the BSIC (Base Station Identity Code, 6 bits) bits network code (operator)» Important at international boundary, where same frequencies can be shared by different operators bits color code To avoid listening a signal from another cell, thinking it comes from the actual one! Sync data 9 TB GP 8.25

12 PRT 4 GSM Radio Interface Lecture 4.2 logical channels Logical vs Physical channels Logical channels (traffic channels, signalling (=control) channels) Physical channels (FM/TM) Physical channels Time given frequencies Issues: modulation, slot synchronization, multiple access techniques, duplexing, frequency hopping, etc Logical channels Built on top of phy channels Issue: which information is exchanged between MS and BSS 2

13 Logical physical mapping frequency Physical Channel: data rate r, time slot i Logical Channel Mapping: ifferent channels may share a same physical channel frequency Frame 8 Frame 9 Frame 0 Frame Frame 2 Logical channel : data rate r/, time slot i, frame k Logical channel B: data rate 2r/, time slot i, frame k+, k+2 GSM logical channels Traffic channel (TCH) TCH/F TCH full rate MS BSS TCH/H TCH half Rate MS BSS Broadcast channel BCCH Broadcast control BSS MS (same information to all MS in a cell) FCCH Frequency Correction BSS MS SCH Synchronization BSS MS Common Control channel (CCCH) RCH Random ccess MS BSS (point to multipoint channels) GCH ccess Grant BSS MS (used for access management) PCH Paging BSS MS edicated Control channel (CCH) SCCH Stand-alone edicated control MS BSS (point-to-point signalling channels) SCCH Slow associated control MS BSS (dedicated to a specific MS) FCCH Fast associated control MS BSS dditional logical channels available for special purposes (SMS, group calls, )

14 n example procedure involving signalling Setup for an incoming call (call arriving from fixed network part - MS responds to a call) Steps: - paging for MS - MS responds on RCH - MS granted an SCCH - authentication & ciphering on SCCH - MS granted a TS (TCH/FCCH) - connection completed on FCCH - ata transmitted on TCH PRT 4 GSM Radio Interface Lecture 4. Traffic channels and associated signalling channels 4

15 Traffic channels (TCH/F) Periodic pattern of 26 frames (20 ms = 5/26 ms/ts * 8 TS/frame* 26 frame) TCH frames over 26 Same TS in every frame Theoretical rate: /8 channel rate: r=.85 kbps signalling frames: r.25 kbps Burst overhead (4 bits over 56.25): r 22.8 kbps TB T 57 S Training S Seq. (26) ata bit burst bit (0.577 ms) TB GP 8.25 Speech coding nalog voice / conversion 8000 samples/s bit/sample igital voice 04 kbps 60 voice samples (20 ms) (2080 bits) Speech COER (8: compression) 260 bits block kbps 5

16 iscontinuous transmission Speech coder implements Voice ctivity etection (V) Voice activity: idle for about 40% of the time To avoid clipping: hangover period (80ms) talking listening talking time When ILE, do not transmit Save battery consumption Reduces interference Receiver side: silence is disturbing! Missing received frames replaced with comfort noise Comfort noise spectral density evaluated by TX decoder nd periodically (480ms) transmitted in special frame (SI= Silence escriptor) Channel Coding Coding: needed to move from 0 - to 0 - radio channel native BER down to acceptable range (0-5 to 0-6 ) BER 260 bits 82 bits 78 bits Parity bits Tail bits(0000) 50 bits 2 bits bits block divided into -Class I: important bits (82) -Class Ia: Most important 50 -Class Ib: Less important 2 -Class II: low importance bits (78) Convolutional coding, r=/2 78 bits 78 bits 456 bits First step: block coding for error detection in class Ia (error discard frame) Second step: convolutional coding for error correction 6

17 Block interleaving B B2 B B4 B5 B6 B7 B8 8 blocks, each with 57 bits iagonal Interleaving Block n- Block n Block n+ B B2 B B4 B5 B6 B7 B8 B B2 B B4 B5 B6 B7 B8 B B2 B B4 B5 B6 B7 B8 n n B5 / B n n B B n n n B8 / B / n+ 4 B5 B / PRICE TO PY: delay!! (block spreaded over 8 bursts 7 ms) Inter-burst Interleaving = B n x = n Bx 4 TB S Training sequence 26 S TB GP

18 Bad Frame Indicator When errors cannot be corrected: Frame must be discarded In substitution, transmit speech frame predictively calculated No more than 6 consecutive BFI If this happens, receiver muted Slow ssociated Control Channel lways associated to instaurated call on TCH (TCH + SCCH = TCH) On the same Time Slot Periodic (order of ½ second) time-scale information for radio link control TCH/F(0 7) TCH/F(0 7) SCCH(0 7) ILE frame SCCH-0 SCCH- SCCH-2 SCCH- SCCH-4 SCCH-5 SCCH-6 SCCH-7 SCCH burst (per TCH) every 26 frames (20 ms) 8

19 SCCH block 84 signalling bits Block coding adds 40 bits (=224) 4 tail (zero) bits (=228) /2 Convolutional encoding (=456 bits) Interleaving: 8 blocks of 57 bits; spreaded into four consecutive bursts 4 bursts = and only SCCH block! SCCH rate: 84 bits/480 ms = 8. bit/s B B2 B B4 B5 B6 B7 B8 Odd/even interleaving 04 frames = 480 ms SCCH contents 84 bits = 2 bytes Power level Timing advance Measurement reports for link quality Measurement reports for handover management free free Power level Timing advance (2 bytes datalink layer) Includes measurement reports When available space: SMS When call in progress! 9

20 Power control Maximum power (defined by class) 2 db steps; Minimum power ( dbm for GSM) (0 dbm for CS 800) MS has ability to reduce/increase power Up to its power class maximum Maximum one 2 db step every 60 ms uplink power measures taken by BTS notified back to MS via SCCH Power level values: = 4 dbm (20 W) 5 = dbm (20 mw) algorithm: manifacturer specific runs on BSC power control applied also on downlink Measurement values RXLEV Power level Present channel + neighbohr cell) RX signal level RXLEV_0 RXLEV_ RXLEV_2 RXLEV_ RXLEV_62 RXLEV_6 From (dbm) To (dbm) RXQUL Bit Error Rate (raw) Bit error Ratio RXQUL_0 RXQUL_ RXQUL_2 RXQUL_ RXQUL_4 RXQUL_5 RXQUL_6 RXQUL_7 From (%) veraged over SCCH block (480ms = 04 frames) To (%)

21 Fast ssociated Control Channel FCCH: urgent signalling Used when several signalling information needs to be transmitted Call setup Handover FCCH block = after coding Interleaved as voice block Spreaded on 8 bursts Replaces a voice block (20 ms) on the TCH Via stealing bits Voice block(s) discarded Maximum FCCH bit rate 84*6/20 [bits/ms] = 9.2 kbps (vs 8 bps of SCCH!) FCCH insertion in TCH Via Stealing bits - upper bit = odd bits stolen - lower bit = even bits stolen - both bits = all burst stolen Figure: shows example of 2 FCCH blocks stealing a TCH (note begin and end behavior due to interleaving) time 2

22 Half-rate traffic channels (TCH/H) Support for 5.6 kbps voice codecs Specification in bits block 2 bits of compressed 20ms voice 95 bits class I» + parity + 6 tail + convolutional coding 04/2 7 bits class 2 Interleaving: Same as voice (block + diagonal + odd/even) But on 4 bursts Framing: TCH/H 0 7 [subchannel 0] TCH/H 8 5 [subchannel ] SCCH 0 7 SCCH Other traffic channels TCH data Basic speed: 9.6 kbps (data,fax) Other speeds: <2.4; 4.8; 9.6; 4.4; ifferent coding details See text(s) Major difference with voice: Interleaving with depth = 9 (!!!) complete fading of a burst is recoverable (unlike voice) 22

23 PRT 4 GSM Radio Interface Lecture 4.4 Broadcast Carrier and Channels F S Broadcast Channel (usual) organization 5 frame structure vs ms period (vs 20 ms) Sub-blocks with 0 frames Starting with Frequency Correction Channel (FCCH) Immediately followed by Synchronization Channel (SCH) Other frames (numbered from #0 to #50): #50 idle #2,,4,5 BCCH Remaining: Paging (PCH) / ccess Grant (GCH) [=PGCH] 5 frame structure - downlink B B B B P P P P F S P P P P P P P P F S P P P P P P P P F S P P P P P P P P F S P P P P P P P P 0 frame sub-block 2

24 R R BCCH carrier placement On ownlink Corresponding uplink dedicated to Random ccess Channel 5 frame structure - uplink R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R On one frequency per cell (beacon) MUST BE on Time Slot #0 Other Time slots may be used by TCH Provided that: ll empty slots are filled with UMMY bursts ownlink power control must be disabled MS powering up First operation when MS turned ON: spectrum analysis (either on list of up to 2 Radio Frequency Channel Numbers of current network) (or on whole 24 carriers spectrum) 24

25 tuning MS listens on strongest beacon for a pure sine wave (FCCH) Coarse bit synchronization Fine tuning of oscillator Immediately follows SCH burst Fine tuning of synchronization (64 bits training sequence) Read burst content for synchronization data 25 bits (+ 0 parity + 4 tail + ½ convolutional coding = 78 bits) 6 bits: BSIC 9 bits: Frame Number (reduced) Finally, MS can read BCCH Multi-framing structure 8 TS, 4.65 ms multiframe = 26 TM frames (20 ms) multiframe = 5 TM frames (25.8 ms) T T T T T T T T T T T T S T T T T T T T T T T T T F S B B B B P P P P F S P P P P P P P P F S P P P P P P P P F S P P P P P P P P F S P P P P P P P P Multiframe 0 Multiframe Multiframe 2 Multiframe 49 Multiframe 50 Multiframe 0 Multiframe Multiframe 25 superframe = 5 x 26-multiframe or 26 x 5-multiframe (26 TM frames, 6.2 s) superframe 0 superframe superframe 2 superframe 2046 superframe 2047 hyperframe = 2048 superframe ( TM frames, h28m5s.76) 25

26 Why frame number? FN = Superframe # Multiframe # frame # Frame # istinguishes logical channels in the same physical channel Multiframe # etermines how BCCH is constructed I.e. which specific information transmitted on BCCH during a given multiframe Superframe # Used as input parameter by encyphering algorithm BCCH contents 84 bits Coded in 456 bits and interleafed in 4 bursts same coding and interleaving as SCCH BCCH capacity 84 bits / (5*8*5/26 ms) ~ 782 bps Information provided etails of the control channel configuration Parameters to be used in the cell Random access backoff values Maximum power an MS may access (MS_TXPWR_MX_CCCH) Minimum received power at MS (RXLEV_CCESS_MIN) Is cell allowed? (CELL_BR_CCESS) Etc. List of carriers used in the cell Needed if frequency hopping is applied List of BCCH carriers and BSIC of neighboring cells 26

27 OWN F S control channel alternative organization 5 frame structure small capacity cell B B B B P P P P F S P P P P P P P P F S F S F S UP R R R R R R R R R R R R R R R R R R R R R R R R R R R Integrates SCCH in same channel as other control information Leaves additional TS all available for TCH 5 frame structure large capacity cell OWN B B B B P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P UP R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R Used in TS 2 (and, eventually, 4 and 6) of beacon carrier Provides additional paging and RCH channels Why 26 and 5? Last frame (idle) in TCH multiframe (Frame #25) used as search frame! T T T T T T T T T T T T S T T T T T T T T T T T T - n active call transmits/receive in 25 frames, except the last one. - in this last frame, it can monitor the BCCH of this (and neighbor) cell - this particular numbering allows to scan all BCCH slots during a superframe - important slots while call is active: frequency correction FCCH and sync SCH! - needed for handover -Worst case: at most every TCH multiframes (.2 s), there will be a frequency correction burst of a neighboring cell 27

28 PRT 4 GSM Radio Interface Lecture 4.5 Paging, Random ccess, dedicated signaling Why paging Channel assignment: only upon explicit request from MS Paging needed to wake-up MS from ILE state when incoming call arrives to MS MS accesses on RCH to ask for a channel Generally SCCH (but immediate TCH assignment is possible) ) paging MS 2) Random access ) Channel assignment BSS/MSC Paging channel: PCH ccess Grant Channel: GCH Random ccess Channel: RCH PGCH CCCH Common Control CHannel 28

29 Paging Paging message generated by MSC Which receives incoming call Transferred to subset of BSC Paging limited to user s location area Paging message contains: List of cells where paging should be performed Identity of paged user (IMSI or TMSI) Paging message coded in 4 consecutive bursts over the air interface Same coding/interleaving structure of SCCH ( bits) Paging for more MSs may be joined in one unique paging message iscontinuous Reception (RX) MS in idle mode should listen to paging channel To save battery, PCH divided into sub-channels Subdivision based on last digits of IMSI User listens only to relevant sub-channel Switches off otherwise PCH sub-channels pattern communicated on BCCH Up to 9 sub-channels 5 frame BCCH structure - downlink F S B B B B P P P P F S P P P P P P P P F S P P P P P P P P F S P P P P P P P P F S P P P P P P P P 29

30 ccess procedure lways activated by MS In response to paging (incoming call) When location update needs to be performed When new call is generated by MS Based on access burst sent on RCH ccess burst coding: 8 payload bits (channel_req) 6 coded bits +6 parity; + 4 tail; + ½ convolutional coding TB 8 Training Seq. (4) ccess burst ata 6 TB GP : response to radio call 0: emergency call 0: new establishment of call : supplementary service (SMS, etc) 000: other case Channel_req message Establishment Cause ( bits) Random discriminator (5 bits) Random discriminator: (0 ) value randomly generated by MS RCH operation MS-C,B C,B C,B B MS- MS-B Multiple ccess Technique for simultaneous access Collision resolution based on - random retrial period - permission probability Same thing..! (SLOTTE LOH protocol) 0

31 RCH performance N stations Each transmits with probability p Retries, in average, every /p slots relevant probabilities: idle : success : collision : N ( p) Np( p) N k = 2 N p k N Maximum efficiency: when p=/n k ( p) N k RCH performance control BCCH broadcasts Backoff time uniform distribution; max value: to 50 Maximum number of retransmission attempts Never greater than 7 May also specify: time interval for a retry after failure (default=5s) RCH group access control MSs divided into 0 groups, depending on SIM-related information BTS may block selected groups llows to reduce RCH load down to as low as 0%» Emergency calls bypass this rule

32 ccess signaling - MS BTS BSC MSC Channel_request Channel_required rnd number rnd&frame number, elay (T estimate) Channel_activation Ch_activation_ack Immediate_assignment rnd&frame number, channel description, Initial T, initial max power Immediate ssignment message on paging channel I.e. GCH is a dynamically mapped channel name PGCH is perhaps better Sent as soon as possible MS continues accessing the RCH Message scheduling is an implementation dependent issue I.e. which message to send in case of many messages, and on which paging slot (4 bursts) MS must disable RX To monitor PGCH for Immediate ssignment message detection Immediate assignment reject possible 2

33 If same random discriminator? two MSs may have same random discriminator Likely in heavy load, with only 5 bits nd transmit in the same frame Only one wins (the other is faded) contention resolved via explicit MS identification On SCCH MS MS2 BTS I I2 leave I continues ccess signaling - 2 MS BTS BSC MSC Immediate_assignment Initial_message MS I (IMSI or TMSI), MS capabilities (=classmark), establishment cause Initial_message_ack (U) Establishment_indication Copy of Initial message (including MS I) Further signaling: MSC to MS

34 4 Stand Stand-alone alone edicated edicated Control Control Channel Channel - SCCH SCCH edicated bidirectional channel to MS but used to exchange signalling Has an associated SCCH Coding: as SCCH bits on 4 consecutive bursts Typical framing (SCCH/8) 8 SCCH (+8 SCCH) on channel (carrier,ts) SCCH message per 5-multiframe 84 bits / (5*8*5/26 ms) = 598/765 kbps ~ 782 bit/s SCCH every 2 multiframe SCCH/4 for small cells SCCH shares BCCH+PGCH channel - see before -

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 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 System. Global System for Mobile Communications

GSM 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 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

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

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 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

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 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 - 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

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 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

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

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

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

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

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

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

-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

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

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 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

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

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

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

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

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

Multiple Access Techniques PROF. MICHAEL TSAI 2011/12/8

Multiple Access Techniques PROF. MICHAEL TSAI 2011/12/8 Multiple Access Techniques PROF. MICHAEL TSAI 2011/12/8 Multiple Access Scheme Allow many users to share simultaneously a finite amount of radio spectrum Need to be done without severe degradation of the

More information

Attenuation (amplitude of the wave loses strength thereby the signal power) Refraction Reflection Shadowing Scattering Diffraction

Attenuation (amplitude of the wave loses strength thereby the signal power) Refraction Reflection Shadowing Scattering Diffraction Wireless Physical Layer Q1. Is it possible to transmit a digital signal, e.g., coded as square wave as used inside a computer, using radio transmission without any loss? Why? It is not possible to transmit

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

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

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

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

Figure 1: cellular system architecture

Figure 1: cellular system architecture Question 1: (30 marks) Consider a FDM cellular system with 120 cites, a frequency reuse factor of N=12, and 900 overall two-way channels. Omni-directional antennas are used: Figure 1 shows some of the

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

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

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

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

COMPATIBILITY STUDY FOR UMTS OPERATING WITHIN THE GSM 900 AND GSM 1800 FREQUENCY BANDS

COMPATIBILITY STUDY FOR UMTS OPERATING WITHIN THE GSM 900 AND GSM 1800 FREQUENCY BANDS Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT) COMPATIBILITY STUDY FOR UMTS OPERATING WITHIN THE GSM 900 AND GSM 1800 FREQUENCY

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

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

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

Bluetooth voice and data performance in 802.11 DS WLAN environment

Bluetooth voice and data performance in 802.11 DS WLAN environment 1 (1) Bluetooth voice and data performance in 802.11 DS WLAN environment Abstract In this document, the impact of a 20dBm 802.11 Direct-Sequence WLAN system on a 0dBm Bluetooth link is studied. A typical

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

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

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

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

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

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

Introduction Ericsson Handheld Telephone 1341-B

Introduction Ericsson Handheld Telephone 1341-B Ericsson Handheld Telephone 1341-B 2 Contents General 5 The Mobile Telephone Network 6 Base Station and Cell 7 Radio Channels 7 Radio Coverage 8 Transmission Control and Communication 9 Quality Control

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

Introduction to EDGE. 2.1 What Is EDGE?

Introduction 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 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

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

Cell Planning in GSM Mobile

Cell Planning in GSM Mobile Cell Planning in Mobile JALAL JAMAL HAMAD-AMEEN M.Sc, College of Engineering, Electrical Engineering Dept. Salahaddin University, Erbil, IRAQ E-mail : jalal3120002000@yahoo.com Abstract: Cell planning

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

The Evolution of 3G CDMA Wireless Networks. David W. Paranchych IEEE CVT Luncheon January 21, 2003

The Evolution of 3G CDMA Wireless Networks. David W. Paranchych IEEE CVT Luncheon January 21, 2003 The Evolution of 3G CDMA Wireless Networks David W. Paranchych IEEE CVT Luncheon January 21, 2003 Outline Past: cdma2000 1xRTT Present: 1xEV-DO What is it? How does it work? How well does it work? What

More information

VoIP-Kapazität im Relay erweiterten IEEE 802.16 System

VoIP-Kapazität im Relay erweiterten IEEE 802.16 System VoIP-Kapazität im Relay erweiterten IEEE 802.16 System 21. ComNets-Workshop Mobil- und Telekommunikation Dipl.-Ing. Karsten Klagges ComNets Research Group RWTH Aachen University 16. März 2012 Karsten Klagges

More information

CMU200: 2 2,5 Generation of Mobile Communication Systems GSM / GPRS / EGPRS. 2 MAR Re 1 1 CMU 200 GSM / GPRS / EGPRS

CMU200: 2 2,5 Generation of Mobile Communication Systems GSM / GPRS / EGPRS. 2 MAR Re 1 1 CMU 200 GSM / GPRS / EGPRS CMU200: 2 2,5 Generation of Mobile Communication Systems GSM / GPRS / EGPRS 2 MAR Re 1 1 08/00 of GSM, GPRS and EGPRS Basic Information about: u Physical Resource u GMSK and 8PSK u Mapping u Coding Schemes

More information

CHAPTER 8 MULTIPLEXING

CHAPTER 8 MULTIPLEXING CHAPTER MULTIPLEXING 3 ANSWERS TO QUESTIONS.1 Multiplexing is cost-effective because the higher the data rate, the more cost-effective the transmission facility.. Interference is avoided under frequency

More information

CSE331: Introduction to Networks and Security. Lecture 6 Fall 2006

CSE331: Introduction to Networks and Security. Lecture 6 Fall 2006 CSE331: Introduction to Networks and Security Lecture 6 Fall 2006 Open Systems Interconnection (OSI) End Host Application Reference model not actual implementation. Transmits messages (e.g. FTP or HTTP)

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

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

Coverage measurement systems. Radio Network Analyzer R&S TSMU. Interferences a frequent impairment in radio networks

Coverage measurement systems. Radio Network Analyzer R&S TSMU. Interferences a frequent impairment in radio networks MOBILE RADIO Coverage measurement systems 44820/2 FIG 1 The R&S TSMU automatically detects, analyzes and displays the results of co-channel and adjacent-channel interferences in GSM networks during a drive

More information

LoRaWAN. What is it? A technical overview of LoRa and LoRaWAN. Technical Marketing Workgroup 1.0

LoRaWAN. What is it? A technical overview of LoRa and LoRaWAN. Technical Marketing Workgroup 1.0 LoRaWAN What is it? A technical overview of LoRa and LoRaWAN Technical Marketing Workgroup 1.0 November 2015 TABLE OF CONTENTS 1. INTRODUCTION... 3 What is LoRa?... 3 Long Range (LoRa )... 3 2. Where does

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

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

Interpreting the Information Element C/I

Interpreting the Information Element C/I Prepared Date Rev Document no pproved File/reference 1(17) 2000-04-11 Interpreting the Information Element C/I This document primarily addresses users of TEMS Investigation. 2(17) 1 Introduction Why is

More information

LTE Evolution for Cellular IoT Ericsson & NSN

LTE Evolution for Cellular IoT Ericsson & NSN LTE Evolution for Cellular IoT Ericsson & NSN LTE Evolution for Cellular IoT Overview and introduction White Paper on M2M is geared towards low cost M2M applications Utility (electricity/gas/water) metering

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

GSM frequency planning

GSM frequency planning GSM frequency planning Band : 890-915 and 935-960 MHz Channel spacing: 200 khz (but signal bandwidth = 400 khz) Absolute Radio Frequency Channel Number (ARFCN) lower band: upper band: F l (n) = 890.2 +

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

TSG-RAN Meeting #7 Madrid, Spain, 13 15 March 2000 RP-000034. Title: Agreed CRs to TS 25.301. Agenda item: 6.3.3

TSG-RAN Meeting #7 Madrid, Spain, 13 15 March 2000 RP-000034. Title: Agreed CRs to TS 25.301. Agenda item: 6.3.3 TSG-RAN Meeting #7 Madrid, Spain, 13 15 March 2000 RP-000034 Title: Agreed CRs to TS 25.301 Source: TSG-RAN WG2 Agenda item: 6.3.3 Doc-1st- Spec CR Rev Subject Cat Version Versio R2-000213 25.301 032 Correction

More information

Agilent GSM/EDGE Self-Guided Demonstration for the E4438C ESG Vector Signal Generator and PSA Series Spectrum Analyzers

Agilent GSM/EDGE Self-Guided Demonstration for the E4438C ESG Vector Signal Generator and PSA Series Spectrum Analyzers Agilent GSM/EDGE Self-Guided Demonstration for the E4438C ESG Vector Signal Generator and PSA Series Spectrum Analyzers Product Note Striving to meet all your test needs Agilent knows that the time you

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

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

SPYTEC 3000 The system for GSM communication monitoring

SPYTEC 3000 The system for GSM communication monitoring SPYTEC 3000 The system for GSM communication monitoring The SPYTEC 3000 system is intended for passive (if system encryption is absent of if A5.2 encryption is used) or semi-active (if A5.1 encryption

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

LoRa FAQs. www.semtech.com 1 of 4 Semtech. Semtech Corporation LoRa FAQ

LoRa FAQs. www.semtech.com 1 of 4 Semtech. Semtech Corporation LoRa FAQ LoRa FAQs 1.) What is LoRa Modulation? LoRa (Long Range) is a modulation technique that provides significantly longer range than competing technologies. The modulation is based on spread-spectrum techniques

More information

Location management Need Frequency Location updating

Location management Need Frequency Location updating Lecture-16 Mobility Management Location management Need Frequency Location updating Fig 3.10 Location management in cellular network Mobility Management Paging messages Different paging schemes Transmission

More information

Protocolo IEEE 802.15.4. Sergio Scaglia SASE 2012 - Agosto 2012

Protocolo IEEE 802.15.4. Sergio Scaglia SASE 2012 - Agosto 2012 Protocolo IEEE 802.15.4 SASE 2012 - Agosto 2012 IEEE 802.15.4 standard Agenda Physical Layer for Wireless Overview MAC Layer for Wireless - Overview IEEE 802.15.4 Protocol Overview Hardware implementation

More information

Chapter 6 Bandwidth Utilization: Multiplexing and Spreading 6.1

Chapter 6 Bandwidth Utilization: Multiplexing and Spreading 6.1 Chapter 6 Bandwidth Utilization: Multiplexing and Spreading 6.1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Note Bandwidth utilization is the wise use of

More information

PXI. www.aeroflex.com. GSM/EDGE Measurement Suite

PXI. www.aeroflex.com. GSM/EDGE Measurement Suite PXI GSM/EDGE Measurement Suite The GSM/EDGE measurement suite is a collection of software tools for use with Aeroflex PXI 3000 Series RF modular instruments for characterising the performance of GSM/HSCSD/GPRS

More information

3GPP TS 25.225 V3.12.0 (2003-06)

3GPP TS 25.225 V3.12.0 (2003-06) TS 25.225 V3.12.0 (2003-06) Technical Specification 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical layer Measurements (TDD) (Release 1999) The present

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

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

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

Wireless Information Transmission System Lab. Introduction to Wireless Communications

Wireless Information Transmission System Lab. Introduction to Wireless Communications Wireless Information Transmission System Lab. Introduction to Wireless Communications Wireless Communication Systems Network Radio wave wire wire LAN Network Base station transceiver LAN 2 Wireless Technologies

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

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

Introduction to Clean-Slate Cellular IoT radio access solution. Robert Young (Neul) David Zhang (Huawei)

Introduction to Clean-Slate Cellular IoT radio access solution. Robert Young (Neul) David Zhang (Huawei) Introduction to Clean-Slate Cellular IoT radio access solution Robert Young (Neul) David Zhang (Huawei) Page 11 Introduction and motivation There is a huge opportunity for Mobile Network Operators to exploit

More information

Scanning with Sony Ericsson TEMS Phones. Technical Paper

Scanning with Sony Ericsson TEMS Phones. Technical Paper Scanning with Sony Ericsson TEMS Phones Technical Paper Scanning with Sony Ericsson TEMS Phones 2009-05-13 Ascom 2009. All rights reserved. TEMS is a trademark of Ascom. All other trademarks are the property

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

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

Frequency Hopping for GSM Base Station Tests with Signal Generators SME

Frequency Hopping for GSM Base Station Tests with Signal Generators SME Frequency Hopping for GSM Base Station Tests with Signal Generators SME Application Note 1GPAN28E A. Winter 07.95 Products: Signal Generator SME Software Package SME-K1 Introduction One of the problems

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

Interference Analysis of a Total Frequency Hopping GSM Cordless Telephony System 1

Interference Analysis of a Total Frequency Hopping GSM Cordless Telephony System 1 Interference Analysis of a Total Frequency Hopping GSM Cordless Telephony System 1 Jürgen Deißner, André Noll Barreto, Ulrich Barth*, and Gerhard Fettweis Endowed Chair for Mobile Communications Systems

More information