layer 3 messages
DESCRIPTION
GSM layer 3TRANSCRIPT
![Page 1: Layer 3 Messages](https://reader035.vdocuments.us/reader035/viewer/2022062407/55cf97ec550346d033947488/html5/thumbnails/1.jpg)
1. Paging Messages
1123
212
3
2. System Info Messages
1 IDLE MODE Informations12345
2 DEDICATED MODE Information12
3. Call Processing Messages123
Other L3 Messages123456789
1011121314151617181920
21
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 LULocation Update RequestLocation 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 Modify
Channel Mode Modify Acknowledge
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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
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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
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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.
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System Info 1 ( Idle Mode)
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System Info 2 ( Idle Mode)
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System Info 3 ( Idle Mode)
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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.
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System Info 4 ( Idle Mode)
Note:
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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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System Info 5 ( Dedicated Mode)
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System Info 6 ( Dedicated Mode)
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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.
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System Info 13 ( Idle Mode, GPRS Information) Click to return to main page
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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.
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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.
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1. Channel Request
2. Immediate Assignment
3. CM Service Request
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4.Authentication Request go back
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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
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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.
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In this message only the mobile forward the called number to the system.
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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
9. Setup
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10. Call Confirmed
11. Assignment Command
12. Assignment Command
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13. Alerting
14. Connect
14. Connect Acknowledge
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SMS Request
SMS Service Request Message
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Click to return to main page
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System Info 5 for the following Handover process
Measurement Report 1
Measurement Report 2
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Measurement Report 3
Measurement Report 4
Measurement Report 5
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Measurement Report 6
Measurement Report 7
Measurement Report 8
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Measurement Report 9
Measurement Report 10
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Measurement Report 11
Measurement Report 12
Measurement Report 13
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Measurement Report 14
Measurement Report 15
Handover Command
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Handover Access
Physical Information
Handover Complete
Physical Information
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Channel Request
Immediate Assignment
Location Updating Request
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Authentication Request
Authentication Response
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TMSI Reallocation Command
TMSI Reallocation Complete
Location Updating Accept
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go back
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Channel Request for Location Updating
Immediate Assignment Extended
DL Disconnect due to NO circuits
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DL Disconnect Normal Cause
Release
Release Complete
Channel Release
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Sync Channel Information
Measurement Report
Location Update Request
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Location Updating Accept
Classmark Enquiry
Classmark Change
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Channel Request for Call re-establishment
Immediate Assignment for Call re-establishment
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CM Re-establishment Request
CM Service Reject
CM Service Accept
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Cell Broadcast Page
Channel Mode Modify
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Channel Mode Modify Acknowledge
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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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