October 27, 2020 | Author: Anonymous | Category: N/A
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 messagi messages scenarios, A 4.08 is not f
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 Channel Request for LU 2 Location Update Request 3 Location Update Accept 4 Immediate Assignment Extended 5 Disconnect due to No Circuits 6 Disconnect Normal Cause 7 Release 8 Release Complete 9 Channel Release 10 Sync Channel Information 11 Measurement Report 12 Classmark Enquiry 13 Classmark Change 14 Channel Request for Call Re-establishment 15 Immediate Assignment for Call Re-establishment 16 CM Re-establishment Request 17 CM Service Reject 18 CM Service Accept 19 Cell Broadcast Page 20 Channel Mode Modify 21 Channel Mode Modify Acknowledge
Created by Jayadevan.N
[email protected] www.adacellworks.com
nks are provided for every messages. To view the ailed L3 Messages click the messages.
n.N @adacellworks.com m
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.
MS
BSS
MOBILE ORIGINATED CALL MSC/ VLR
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
Address Complete Message ( Alerting
Answer Signal/Answer Message Connect Connect Acknowledge
MS
BSS
MOBILE TERMINATED CALL MSC/ VLR
Provide Roaming Number Roaming Number
Initial Address Message 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 ( Connect
Answer Signal/Answer Message
Connect Acknowledge
MS
BSS Channel Request Immediate Assignment Location Update Request
LOCATION AREA UPDATING MSC/ VLR
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 TMSI Realloc Command TMSI Realloc Complete Location Update Accept
HLR
PSTN
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PSTN
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Initial Address Message (IAM)
ddress Complete Message (ACM)
wer Signal/Answer Message (ANM)
HLR Send Routing Info
Routing Information Initial Address Message (IAM)
ddress Complete Message (ACM)
wer Signal/Answer Message (ANM)
HLR
old VLR
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Cancel Location Loc cancell accept
Paging Message Type 1 (2 TMSI Combination)
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Brief Idea: Generally 3 types of Paging messages 1. Paging Message Type 1 Contains Paging for Max 2 mobiles
2. Paging Message Type 2 Contains Paging message for 3 mo 3. Paging Message Type 3 Contains only 4 TMSI's.
Paging Message Type 1 (1 TMSI & 1 IMSI Combination)
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Paging Message Type 1 (2 IMSI Combination)
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Paging Message Type 2 (2 TMSI & 1 IMSI Combination)
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Paging Message Type 2 (3 TMSI Combination)
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Paging Message Type 3 ( Will contain only 4 TMSI)
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Generally 3 types of Paging messages. Message Type 1 Contains Paging for Max 2 mobiles, with IMSI or TMSI
Message Type 2 Contains Paging message for 3 mobiles. 1 IMSI and the other 2 or 1 TMSI
Message Type 3 Contains only 4 TMSI's.
System Info 1 ( Idle Mode)
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Note: This message normally for the Cell channel Info frequencies allocated for the particular cell. In hop frequencies in the MAL list along with the BCCH fr indicate the TCH & BCCH frequencies.
System Info 2 ( Idle Mode)
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Note: This message gives the information about the ne Will only gives the BCCH of the neighbors defined. allows the mobile to restrict the neighbors to be sen
System Info 3 ( Idle Mode)
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System Info 4 ( Idle Mode)
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Note: This message gives the information CBCH. Along with the other cell leve etc…..
System Info 5 ( Dedicated Mode)
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Note: This message gives the informatio mode. Will only gives the BCCH of th
System Info 6 ( Dedicated Mode)
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System Info 13 ( Idle Mode, GPRS Information)
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age normally for the Cell channel Informations. This will give the no of allocated for the particular cell. In hopping case this will indicate the n the MAL list along with the BCCH frequency. In non hopping case will TCH & BCCH frequencies.
age gives the information about the neighbor frequencies in the idle mode. es the BCCH of the neighbors defined. And the NCC permitted parameter obile 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
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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 mo
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
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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
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Note: This is scheduled to allocate SDCCH for 2 mobiles simultaneously.
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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.
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