Part 1   : Mobilty Management in Mobiles

1.1) Environnement Radio

1) What is the dynamic range of the power received by MS?

-48dB to -56dB (Log file 0723_01)

2) What is the relationship between RXLEV and TXPWR of MS?

Inversely proportional

3) When MS received power from BTS decrease what does it do?

It increases its output power

4) What is the code of the mobile network?

Mobile country code (MCC) : 470 Mobile network code (MNC) : 07

(log file: 0723_03)98

1.2) BCCH channelExplain the different Information messages transmitted on the BCCH channel?

1.2.1) System Information Type 1:

In this type, it tells information about access control, call reestablish and other basic paramters. Contents are shown below.

MS1System Information Type 1

Time: 15:24:48.73Frame number: 2349272

ARFCN : 118 (E-GSM)

L2PseudoLength : 21Skip indicator : 0Protocol discriminator : (6) Radio resources management messagesMessage type : 25Cell channel description Bitmap 0 Channels : 97 99 104 RACH control parameters Max retransmission : (3) Maximum 7 retransmissions Tx-integer : (12) 20 slots used Cell bar access : (0) Not barred Call reestablishment : (1) Not allowed Access control Emergency Call allowed : (0) All MSs Barred classes : Rest octets Band indication 1800

1.2.2) System Information Type 2:

MS1System Information Type 2

Time: 15:24:48.96Frame number: 2349323

ARFCN : 118 (E-GSM)L2PseudoLength : 22Skip indicator : 0Protocol discriminator : (6) Radio resources management messagesMessage type : 26Neighbour Cell Description EXT IND : (0) The information element carries the complete BA BA IND : 0 Bitmap 0 Channels : 112 117 118 119 121 123 NCC permitted NCC permitted values : 0 1 2 3 4 5 6 7 RACH control parameters Max retransmission : (3) Maximum 7 retransmissions Tx-integer : (12) 20 slots used Cell bar access : (0) Not barred

Call reestablishment : (1) Not allowed Access control Emergency Call allowed : (0) All MSs Barred classes :

1.2.3) System Information Type 3

MS1System Information Type 3

Time: 15:24:48.25Frame number: 2349170

ARFCN : 118 (E-GSM)L2PseudoLength : 18Skip indicator : 0Protocol discriminator : (6) Radio resources management messagesMessage type : 27Cell identity (CI) : 31783 (Hex 0x7C27)Location Area Identification Mobile country code (MCC) : 410 Mobile network code (MNC) : 01 Location area code (LAC) : 644 (Hex 0x0284)Control channel description MSCR : (0) MSC is Release '98 or older Attach/detach allowed (ATT) : (1) YES BS-AG-BLKS-RES : 2 CCCH-CONF : (0) 1 basic physical channel used for CCCH, not combined with SDCCHs CBQ3 : (0) Iu mode not supported BS-PA-MFRMS : 4 multiframes period T3212 timeout value : (60) 6.0 hoursCell options (BCCH) Dynamic ARFCN mapping indicator (DN-IND) : (0) Dynamic ARFCN mapping is not used by the PLMN Power control indicator (PWRC) : (1) Set DTX indicator : (1) The MSs shall use uplink discontinuous transmission RADIO-LINK-TIMEOUT : 28Cell selection parameters CELL-RESELECT-HYSTERESIS : 12 dB Rxlev hysteresis for LA-reselection MS-TXPWR-MAX-CCH : 5 ADDITIONAL RESELECT PARAM IND (ACS) : (0) System information type 16 and 17 are not broadcast on the BCCH HALF RATE SUPPORT (NECI) : (1) New establishment causes are supported RXLEV-ACCESS-MIN : 8RACH control parameters Max retransmission : (3) Maximum 7 retransmissions

Tx-integer : (12) 20 slots used Cell bar access : (0) Not barred Call reestablishment : (1) Not allowed Access control Emergency Call allowed : (0) All MSs Barred classes : Rest octets System Information 2ter indicator - Not Available Early classmark sending control - Explicity accepted BCCH scheduling is not sent in SI9 Neither UTRAN nor CDMA2000 classmark change message shall be sent with the Early classmark sending

1.2.4) System Information Type 4

MS1System Information Type 4

Time: 15:24:48.01Frame number: 2349119

ARFCN : 118 (E-GSM)L2PseudoLength : 12Skip indicator : 0Protocol discriminator : (6) Radio resources management messagesMessage type : 28Location Area Identification Mobile country code (MCC) : 410 Mobile network code (MNC) : 01 Location area code (LAC) : 644 (Hex 0x0284)Cell selection parameters CELL-RESELECT-HYSTERESIS : 12 dB Rxlev hysteresis for LA-reselection MS-TXPWR-MAX-CCH : 5 ADDITIONAL RESELECT PARAM IND (ACS) : (0) The SI 4/7/8 rest octets, if present, shall

be used to derive the value of PI and possibly C2 parameters and/or other parameters HALF RATE SUPPORT (NECI) : (1) New establishment causes are supported RXLEV-ACCESS-MIN : 8RACH control parameters Max retransmission : (3) Maximum 7 retransmissions Tx-integer : (12) 20 slots used Cell bar access : (0) Not barred Call reestablishment : (1) Not allowed Access control Emergency Call allowed : (0) All MSs Barred classes :

Rest octets Additional parameters are not sent in SYSTEM INFORMATION TYPE 7 and 8

1.2.5) System Information Type 5

MS1System Information Type 5

Time: 14:01:32.21Frame number: 342294

L2 Header (Hex) : 0x08 0x03 0x03 0x03 0x49 Skip indicator : 0Protocol discriminator : (6) Radio resources management messagesMessage type : 29Neighbour Cell Description EXT IND : (0) The information element carries the complete BA BA IND : 0 Variable bitmap Channels : 627 649 664 682 685

1.2.6) System Information Type 6

MS1System Information Type 6

Time: 14:01:32.68Frame number: 342398

L2 Header (Hex) : 0x07 0x03 0x03 0x03 0x2D Skip indicator : 0Protocol discriminator : (6) Radio resources management messagesMessage type : 30Cell identity (CI) : 21757 (Hex 0x54FD)Location Area Identification Mobile country code (MCC) : 470 Mobile network code (MNC) : 07 Location area code (LAC) : 11282 (Hex 0x2C12)Cell options (SACCH) Power control indicator (PWRC) : (0) Not set DTX indicator : The MS shall use uplink discontinuous transmission on a TCH/F. The MS shall use uplink discontinuous transmission on a TCH/H. RADIO-LINK-TIMEOUT : 16NCC permitted

NCC permitted values : 0 1 2 3 4 5 6 7 Rest octets No PCH/NCH info No VBS/VGCS options DTM not supported Band indication 1800

1.3) MAC, Authentification, Sécurisation, et F/TDMA

Authentication Message

Ciphering Message:

MS1

Ciphering Mode Command

Time: 13:58:53.93

Frame number: 307998

Skip indicator : 0

Protocol discriminator : (6) Radio resources management messages

Message type : 53

Cipher response

CR : (0) IMEISV shall not be included

Cipher mode setting

Algorithm ID : Cipher with algorithm A5/1

SC : (1) Start ciphering

Header dump (Hex):

2A 00 05 00 00 00 04 05 00 01

03

Message dump (Hex):

06 35 01

1.3.1) Procedure of a call:

1. CM Service Request2. Channel Request3. Immidiate Assignment4. Class Mark Change5. Authentication Request6. Authentication Response7. Ciphering Mode Command8. Ciphering mode complete9.

1.3.2) Handover procedure :Handover procedure in GSM using the corresponding layer 3 messages.

1.4 Control of the quality of Radio Link

1.4.1 SAACH: Measurement ReportWhat is the purpose of the SAACH measuring reports? What role does the SAACH measuring play in a handover? Explain with the help of an example?

1.4.2 Codage Canal et FER

What is the duration of one SAACH slot. How frequently this report is sent to BTS by the mobile?

Show the places on the map where we have constantly bad BER and CRC for some time? What is the possible reason? Does this increase the handovers?

1.5 Handovers HO File: 827_2.log

i) How many handovers have taken place and what are their possible causes?

ii) Describe the handover procedure using the layer 3 messages?

1.6 Voice QualityWhat is the indicator of the Voice Quality? What are effects of BER, FER on voice quality indicator?How does handover effect the voice quality and why?

1.7 EqualisationWhat are the layer three messages sent from BTS to the MS that contain adaptive equalization information? What is that information?

Part 2   : Roaming Management in Mobiles

Explain the location update procedure using layer 3 messages with corresponding snapshots in TEMS?