1. Paging Messages1

1.2.3.

21.2.

3

2. System Info Messages

1 IDLE MODE Informations1.2.3.4.5.

2 DEDICATED MODE Information1.2.

3. Call Processing Messages123

Other L3 Messages Created by Jayadevan.N123456789

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Paging Type 12 TMSI Combination1 TMSI & 1 IMSI Combination2 IMSI Combination

Paging Type 22 TMSI & 1 IMSI Combination3 TMSI Combination

Paging Type 3

System Info 1System Info 2System Info 3System Info 4System Info 13

System Info 5System Info 6

MS Originated CallMS Terminated CallLocation Updating Procedure

Channel Request for LU jayadevan.nirmalan@adacellworks.comLocation Update Request www.adacellworks.comLocation Update AcceptImmediate Assignment ExtendedDisconnect due to No CircuitsDisconnect Normal CauseReleaseRelease CompleteChannel ReleaseSync Channel InformationMeasurement ReportClassmark EnquiryClassmark ChangeChannel Request for Call Re-establishmentImmediate Assignment for Call Re-establishmentCM Re-establishment RequestCM Service RejectCM Service AcceptCell Broadcast PageChannel Mode ModifyChannel Mode Modify Acknowledge

* Links are provided for every messages. To view the

detailed L3 Messages click the messages.

Note: This is just a tutorial material for Layer 3 messaging and call flow. These contains

messages which we encounter in normal RF scenarios, All the messages specified in GSM TS 4.08 is not covered. All the messages are taken

from TEMS 4.1.1 version.

Created by Jayadevan.Njayadevan.nirmalan@adacellworks.comwww.adacellworks.com

* Links are provided for every messages. To view the

detailed L3 Messages click the messages.

Note: This is just a tutorial material for Layer 3 messaging and call flow. These contains

messages which we encounter in normal RF scenarios, All the messages specified in GSM TS 4.08 is not covered. All the messages are taken

from TEMS 4.1.1 version.

Note: In this presentation the BTS & BSC is considered together as BSS part.

MOBILE ORIGINATED CALL

MS BSS

Complete Layer 3 Info

Cipher Mode CMD

Cipher Mode Complete

Assignment Request

Assignment Complete

Address Complete Message (ACM)

Answer Signal/Answer Message (ANM)

MOBILE TERMINATED CALL

MS BSS

MSC/VLR

Channel Request

Immediate Assignment

CM Sevice Request

Authentication Request

Authentication Response

Ciphering Mode Command

Cipher Mode Complete

Setup

Identity Request

Identity Response

Call Proceeding

Assignment Command

Assignment Complete

Initial Address Message

Alerting

Connect

Connect Acknowledge

MSC/VLR

Provide Roaming Number

Roaming Number

Paging Command

Complete Layer 3 Info

Cipher Mode CMD

Cipher Mode Complete

Assignment Request

Assignment Complete

Address Complete Message (ACM)

Answer Signal/Answer Message (ANM)

LOCATION AREA UPDATING

MS BSS

Initial Address Message

Paging

Channel Request

Immediate Assignment

Paging Response

Ciphering Mode Command

Ciphering Mode Complete

Identity Request

Identity Response

Setup

Call Confirmed

Assignment Command

Assignment Complete

Alerting

Connect

Connect Acknowledge

MSC/VLR

Channel Request

Immediate Assignment

Location Update Request

Complete Layer 3 InfoSend Authentication para

Authentication Para

Update Location

Insert Subsciber data

Sub data insertion acc

Location Update Accept

Authentication Request

Authentication Response

TMSI Realloc Command

TMSI Realloc Complete

Location Update Accept

HLR PSTN

Address Complete Message (ACM)

Answer Signal/Answer Message (ANM)

HLR PSTN

Send Routing Info

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Initial Address Message (IAM)

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Routing Information

Address Complete Message (ACM)

Answer Signal/Answer Message (ANM)

HLR

Initial Address Message (IAM)

old VLR

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Cancel Location

Loc cancell accept

Paging Message Type 1 (2 TMSI Combination)

Brief Idea: Generally 3 types of Paging messages. 1. Paging Message Type 1

Contains Paging for Max 2 mobiles, with IMSI or TMSI

2. Paging Message Type 2Contains Paging message for 3 mobiles. 1 IMSI and the other 2 or 1 TMSI

3. Paging Message Type 3Contains only 4 TMSI's.

Paging Message Type 1 (1 TMSI & 1 IMSI Combination)

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Paging Message Type 1 (2 IMSI Combination) Click to return to main page

Paging Message Type 2 (2 TMSI & 1 IMSI Combination)

Paging Message Type 2 (3 TMSI Combination)

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Paging Message Type 3 ( Will contain only 4 TMSI) Click to return to main page

Brief Idea: Generally 3 types of Paging messages. 1. Paging Message Type 1

Contains Paging for Max 2 mobiles, with IMSI or TMSI

2. Paging Message Type 2Contains Paging message for 3 mobiles. 1 IMSI and the other 2 or 1 TMSI

3. Paging Message Type 3Contains only 4 TMSI's.

System Info 1 ( Idle Mode)

Note:

System Info 2 ( Idle Mode)

Note:

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This message normally for the Cell channel Informations. This will give the no of frequencies allocated for the particular cell. In hopping case this will indicate the frequencies in the MAL list along with the BCCH frequency. In non hopping case will indicate the TCH & BCCH frequencies.

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This message gives the information about the neighbor frequencies in the idle mode. Will only gives the BCCH of the neighbors defined. And the NCC permitted parameter allows the mobile to restrict the neighbors to be sent in the measurement report.

System Info 3 ( Idle Mode)

System Info 4 ( Idle Mode)

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Note:

System Info 5 ( Dedicated Mode)

Note:

This message gives the information about the CBCH for the mobile to decode the CBCH. Along with the other cell level details like LAC, RACH control parameters etc…..

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This message gives the information about the neighbor frequencies in the dedicated mode. Will only gives the BCCH of the neighbors defined.

System Info 6 ( Dedicated Mode)

System Info 13 ( Idle Mode, GPRS Information)

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This message normally for the Cell channel Informations. This will give the no of frequencies allocated for the particular cell. In hopping case this will indicate the frequencies in the MAL list along with the BCCH frequency. In non hopping case will indicate the TCH & BCCH frequencies.

This message gives the information about the neighbor frequencies in the idle mode. Will only gives the BCCH of the neighbors defined. And the NCC permitted parameter allows the mobile to restrict the neighbors to be sent in the measurement report.

This message gives the information about the CBCH for the mobile to decode the CBCH. Along with the other cell level details like LAC, RACH control parameters etc…..

This message gives the information about the neighbor frequencies in the dedicated mode. Will only gives the BCCH of the neighbors defined.

1. Channel Request

2. Immediate Assignment

3. CM Service Request

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4.Authentication Request go back

5. Authentication Response

6. Ciphering Mode Command

7. Ciphering Mode Complete

8. Setup

Point 2:

In this message only the mobile forward the called number to the system.

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9. Identity Request

10. Identity Response

11. Call Proceeding

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12. Assignment Command

13. Assignment Complete

14. Alerting

15. Connect

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16. Connect Acknowledge go back

Point 1

Once the Mobile sends the RACH it tries to decode all the AGCH information and waits for the Immediate assignment targeted to the particular mobile. It is being identified from the Establishment cause and Random reference.

In this message only the mobile forward the called number to the system.

1. Paging to the MS

2. Channel Request

3. Immediate Assignment

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4. Paging Response

5. Ciphering Mode Command

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6. Ciphering Mode Complete

7. Identity Request

8. Identity Response

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9. Setup

10. Call Confirmed

11. Assignment Command

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12. Assignment Command

13. Alerting

14. Connect

14. Connect Acknowledge

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SMS Request

SMS Service Request Message

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System Info 5 for the following Handover process

Measurement Report 1

Measurement Report 2

Measurement Report 3

Measurement Report 4

Measurement Report 5

Measurement Report 6

Measurement Report 7

Measurement Report 8

Measurement Report 9

Measurement Report 10

Measurement Report 11

Measurement Report 12

Measurement Report 13

Measurement Report 14

Measurement Report 15

Handover Command

Handover Access

Physical Information

Handover Complete

Physical Information

Channel Request

Immediate Assignment

Location Updating Request

Authentication Request

Authentication Response

TMSI Reallocation Command

TMSI Reallocation Complete

Location Updating Accept

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Channel Request for Location Updating

Immediate Assignment Extended

DL Disconnect due to NO circuits

DL Disconnect Normal Cause

Release

Release Complete

Channel Release

Sync Channel Information

Measurement Report

Location Update Request

Location Updating Accept

Classmark Enquiry

Classmark Change

Channel Request for Call re-establishment

Immediate Assignment for Call re-establishment

CM Re-establishment Request

CM Service Reject

CM Service Accept

Cell Broadcast Page

Channel Mode Modify

Channel Mode Modify Acknowledge

Note:

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This is scheduled to allocate SDCCH for 2 mobiles simultaneously.

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Note

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In dedicated mode or group transmit mode, higher layers can request the setting of the channel mode.The channel mode modify procedure allows the network to request the mobile station to set the channelmode for one channel. The channel mode covers the coding, decoding and transcoding mode used on theindicated channel.

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