1. Paging Messages 1 Paging Type 1 1. 2 TMSI Combination 2. 1 TMSI & 1 IMSI Combination 3. 2 IMSI Combination 2 Paging Type 2 1. 2 TMSI & 1 IMSI Combination 2. 3 TMSI Combination
* Links are provided for every messages. To view the detailed L3 Messages click the messages.
3 Paging Type 3
2. System Info 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.
1 IDLE MODE Informations 1. System Info 1 2. System Info 2 3. System Info 3 4. System Info 4 5. System Info 13 2 DEDICATED MODE Information 1. System Info 5 2. System Info 6
3. Call Processing Messages 1 MS Originated Call 2 MS Terminated Call 3 Location Updating Procedure
Other L3 Messages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Channel Request for LU Location Update Request Location Update Accept Immediate Assignment Extended Disconnect due to No Circuits Disconnect Normal Cause Release Release Complete Channel Release Sync Channel Information Measurement Report 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
Created by Jayadevan.N
[email protected] www.adacellworks.com
Note: In this presentation the BTS & BSC is considered together as BSS part.
MS
BSS
MOBILE ORIGINATED CALL MSC/ VLR
HLR
Channel Request Immediate Assignment CM Sevice Request Complete Layer 3 Info Authentication Request Authentication Response Cipher Mode CMD Ciphering Mode Command Cipher Mode Complete Cipher Mode Complete Setup Identity Request Identity Response Call Proceeding Assignment Request Assignment Command Assignment Complete Assignment Complete Initial Address Message (IAM) Address Complete Message (ACM) Alerting Answer Signal/Answer Message (ANM) Connect Connect Acknowledge
PSTN
MS
BSS
MOBILE TERMINATED CALL MSC/ VLR
HLR
PSTN Send Routing Info
Provide Roaming Number Roaming Number Routing Information Initial Address Message (IAM) Paging Command Paging Channel Request Immediate Assignment Paging Response Complete Layer 3 Info Cipher Mode CMD Ciphering Mode Command Ciphering Mode Complete Cipher Mode Complete Identity Request Identity Response Setup Call Confirmed Assignment Request Assignment Command Assignment Complete Assignment Complete Alerting Address Complete Message (ACM) Connect
Connect Acknowledge
MS
Answer Signal/Answer Message (ANM)
BSS
LOCATION AREA UPDATING MSC/ VLR
old VLR
HLR
Channel Request Immediate Assignment Location Update Request Complete Layer 3 Info Send Authentication para Authentication Para Authentication Request Authentication Response Update Location Insert Subsciber data Sub data insertion acc Location Update Accept Cancel Location TMSI Realloc Command Loc cancell accept TMSI Realloc Complete Location Update Accept
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Paging Message Type 1 (2 TMSI Combination)
Paging Message Type 1 (1 TMSI & 1 IMSI Combination)
Paging Message Type 1 (2 IMSI Combination)
Paging Message Type 2 (2 TMSI & 1 IMSI Combination)
Paging Message Type 2 (3 TMSI Combination)
Paging Message Type 3 ( Will contain only 4 TMSI)
System Info 1 ( Idle Mode)
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Note: 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.
System Info 2 ( Idle Mode)
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Note: 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)
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System Info 4 ( Idle Mode)
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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…..
System Info 5 ( Dedicated Mode)
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Note: 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)
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System Info 13 ( Idle Mode, GPRS Information)
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1. Channel Request
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2. Immediate Assignment
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3. CM Service Request
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4.Authentication Request
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5. Authentication Response
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6. Ciphering Mode Command
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7. Ciphering Mode Complete
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8. Setup
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Point 2: In this message only the mobile forward the called number to the sys
9. Identity Request
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10. Identity Response
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11. Call Proceeding
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12. Assignment Command
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13. Assignment Complete
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14. Alerting
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15. Connect
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16. Connect Acknowledge
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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.
In this message only the mobile forward the called number to the system.
1. Paging to the MS
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2. Channel Request
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3. Immediate Assignment
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4. Paging Response
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5. Ciphering Mode Command
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6. Ciphering Mode Complete
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7. Identity Request
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8. Identity Response
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9. Setup
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10. Call Confirmed
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11. Assignment Command
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12. Assignment Command
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13. Alerting
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14. Connect
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14. Connect Acknowledge
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SMS Request
SMS Service Request Message
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
Channel Request for Location Updating
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Immediate Assignment Extended
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Note: This is scheduled to allocate SDCCH for 2 mobiles simultaneously.
DL Disconnect due to NO circuits
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DL Disconnect Normal Cause
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Release
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Release Complete
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Channel Release
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Sync Channel Information
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Measurement Report
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Location Update Request
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Location Updating Accept
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Classmark Enquiry
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Classmark Change
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Channel Request for Call re-establishment
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Immediate Assignment for Call re-establishment
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CM Re-establishment Request
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CM Service Reject
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CM Service Accept
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Cell Broadcast Page
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Channel Mode Modify
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Note 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 channel mode for one channel. The channel mode covers the coding, decoding and transcoding mode used on the indicated channel.
Channel Mode Modify Acknowledge
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