GSM a Interface Messages - BSSAP

GSM A interface - BSS Application Part The A interface is located between the MSC (mobile service switching centre) and the BSS (base station system or radio sub-system). Standard reference: GSM 08-08 § 2, MSC to BSS - Layer 3 The A interface supports several Applications Parts: • •

BSSMAP: Base Station System Management Application Part. DTAP : Direct Transfer Application Part. o RR:Radio Resources. o MM:Mobility Management. o CC:Call Control.

BSSMAP messages Standard reference: GSM 08-08 § 3, MSC to BSS - Layer 3 BSSMAP messages (Base Station System Management Application Part), for a GSM A interface located between the MSC (mobile service switching centre) and the BSS (base station system or radio sub-system) are listed and ordered according to their hexadecimal code or their type (abreviation). Message list: hex codes Code 01 02 03 20 21 22 23 24 25 30 31 32

Abreviation ASS-REQ ASS-COM ASS-FAIL CLEAR-COM CLEAR-COMP CLEAR-REQ SAPI-CL-COM SAPI-CL-COMP SAPI-REJ RESET RESET-ACK OVERLOAD

BSSMAP: message designation Assignment request. Assignment complete. Assignment failure. Clear command. Clear complete. Clear request. SAPI "n" clear request. SAPI "n" clear complete. SAPI "n" rejected. Reset. Reset acknowledge. Overload.

33 34 35 40 41 42 43 50 51 52 53 54 55 56 57 80 81 82 83 84 86 87 88 89 8A 8B

TRACE-INV Trace investigation. RESET-CIR Reset circuit. RST-CI-ACK Reset circuit acknowledge. BLOCK Resource blocked. BLOCK-ACK Acknowledgement resource blocked. UNBLOCK Resource un-blocked. UNBLOCK-ACK Acknowledgement resource un-blocked. RESOURC-REQ Resource request. RESOURC-IND Resource indication. PAGING Paging. CYPHER-COM Cypher mode command. CLASS-UPD "Classmark" update. CYPHER-COMP Cypher mode complete. QUEUEING-IN Queuing-in. LAYER-3-INF Layer 3 information. HAND-REQ Handover request. HAND-RQD Handover requested. HND-RQ-ACK Handover request acknowledge. HAND-COM Handover command. HAND-COMP Handover complete. HAND-FAIL Handover failure. HAND-PERFORM Handover performed. HND-CAND-ENQ Handover candidate enquiry. HND-CAND-REQ Handover candidate request. HAND-REQ-REJ Handover request rejection. HAND-DETECT Handover detection.

Message list: types Abreviation ASS-COM ASS-FAIL ASS-REQ BLOCK BLOCK-ACK CLASS-UPD CLEAR-COM CLEAR-COMP CLEAR-REQ CYPHER-COM CYPHER-COMP HAND-COM HAND-COMP HAND-DETECT HAND-FAIL

Code BSSMAP: message designation 02 Assignment complete. 03 Assignment failure. 01 Assignment request. 40 Resource blocked. 41 Acknowledgement resource blocked. 54 "Classmark" update. 20 Clear command. 21 Clear complete. 22 Clear request. 53 Cypher mode command. 55 Cypher mode complete. 83 Handover command. 84 Handover complete. 8B Handover detection. 86 Handover failure.

HAND-PERFORM HAND-REQ HAND-REQ-REJ HAND-RQD HND-CAND-ENQ HND-CAND-REQ HND-RQ-ACK LAYER-3-INF OVERLOAD PAGING QUEUEING-IN RESET RESET-ACK RESET-CIR RESOURC-IND RESOURC-REQ RST-CI-ACK SAPI-CL-COM SAPI-CL-COMP SAPI-REJ TRACE-INV UNBLOCK UNBLOCK-ACK

87 80 8A 81 88 89 82 57 32 52 56 30 31 34 51 50 35 23 24 25 33 42 43

Handover performed. Handover request. Handover request rejection. Handover requested. Handover candidate enquiry. Handover candidate request. Handover request acknowledge. Layer 3 information. Overload. Paging. Queuing-in. Reset. Reset acknowledge. Reset circuit. Resource indication. Resource request. Reset circuit acknowledge. SAPI "n" clear request. SAPI "n" clear complete. SAPI "n" rejected. Trace investigation. Resource un-blocked. Acknowledgement resource un-blocked.

DTAP Call Control messages Standard reference: GSM 04-08 § 5, §9.3, §10.4, MSC to BSS - Layer 3 DTAP (Direct Transfer Application Part) Call Control messages , for a GSM A interface located between the MSC (mobile service switching centre) and the BSS (base station system or radio sub-system) are listed and ordered according to their hexadecimal code or their type (abreviation). Message list: hex codes Code 01 02 03 05 07 08 0D 0F 10 13

Abreviation ALERTING CALL-PROCEED PROGRESS SETUP CONNECT CALL-CONFIRM EMERG-SETUP CONNECT-ACK USER-INFO MODIFY-REJ”

DTAP Call Control message Alerting. Call proceeding. Progress. Setup. Connect. Call confirmed. Emergency setup. Connect acknowledged. User information. Modify reject.

17 1F 25 2A 2D 31 32 34 35 36 37 39 3D 3E

MODIFY Modify MODIFY-COMP Modify complete. DISCONNECT Disconnect. RELEASE-COMP Release complete. RELEASE Release. STOP-DTMF Stop DTMF. STOP-DTMF-ACK Stop DTMF acknowledge. STATUS-ENQ Status enquiry. START-DTMF Start DTMF. START-DTMF-AC Start DTMF acknowledge. START-DTMF-RE Start DTMF reject. CONGEST-CTRL Congestion control. STATUS Status. NOTIFY Notify.

Message list: types Abreviation ALERTING CALL-CONFIRM CALL-PROCEED CONGEST-CTRL CONNECT CONNECT-ACK DISCONNECT EMERG-SETUP MODIFY MODIFY-COMP MODIFY-REJ” NOTIFY PROGRESS RELEASE RELEASE-COMP SETUP START-DTMF START-DTMF-AC START-DTMF-RE STATUS STATUS-ENQ STOP-DTMF STOP-DTMF-ACK USER-INFO

Code DTAP Call Control message 01 Alerting. 08 Call confirmed. 02 Call proceeding. 39 Congestion control. 07 Connect. 0F Connect acknowledged. 25 Disconnect. 0D Emergency setup. 17 Modify 1F Modify complete. 13 Modify reject. 3E Notify. 03 Progress. 2D Release. 2A Release complete. 05 Setup. 35 Start DTMF. 36 Start DTMF acknowledge. 37 Start DTMF reject. 3D Status. 34 Status enquiry. 31 Stop DTMF. 32 Stop DTMF acknowledge. 10 User information.

DTAP Radio Resources Management messages Standard reference: GSM 04-08 § 3, §9.1, §10.4, MSC to BSS- Layer 3

DTAP (Direct Transfer Application Part) Radio Resources Management messages , for a GSM A interface located between the MSC (mobile service switching centre) and the BSS (base station system or radio sub-system) are listed and ordered according to their hexadecimal code or their type (abreviation). Message list: hex codes Code 0A 0D 0F 10 12 14 15 16 17 19 1A 1B 1C 1D 1E 21 22 24 26 27 28 29 2B 2C 2D 2F 32 35 39 3A 3B 3F

Abreviation DTAP Radio Resources Management PARTIAL-REL Partial release. CHANNEL-REL Channel release. PART-REL-COM Partial release complete. CHAN-MODIFY Channel mode modify. RR-STATUS RR status. FREQ-REDEF Frequency redefinition. MEASUR-REP Measurement report. CLASSM-CHG Classmark change. CHAN-MOD-ACK Channel mode modify acknowledge. SYS-INFO-T1 System information type 1. SYS-INFO-T2 System information type 2. SYS-INFO-T3 System information type 3. SYS-INFO-T4 System information type 4. SYS-INFO-T5 System information type 5. SYS-INFO-T6 System information type 6. PAG-REQ-T1 Paging request type 1. PAG-REQ-T2 Paging request type 2. PAG-REQ-T3 Paging request type 3. ASS-COMMAND Assignment command. PAGING-REP Paging response. HAND-FAILURE Handover failure. ASS-COMPLETE Assignment complete. HAND-COMM Handover command. HAND-COMP Handover complete. PHYS-INFO Physical layer information. ASS-FAILURE Assignment failure. CIPH-M-COMP Ciphering mode complete. CIPH-M-COMM Ciphering mode command. IMM-ASS-EXT Immediate assignment extended. IMM-ASS-REJ Immediate assignment reject. ADD-ASS Additional assignment. IMM-ASS Immediate assignment.

Message list: types Abreviation Code DTAP Radio Resources Management ADD-ASS 3B Additional assignment. ASS-COMMAND 26 Assignment command.

ASS-COMPLETE ASS-FAILURE CHAN-MOD-ACK CHAN-MODIFY CHANNEL-REL CIPH-M-COMM CIPH-M-COMP CLASSM-CHG FREQ-REDEF HAND-COMM HAND-COMP HAND-FAILURE IMM-ASS IMM-ASS-EXT IMM-ASS-REJ MEASUR-REP PAG-REQ-T1 PAG-REQ-T2 PAG-REQ-T3 PAGING-REP PART-REL-COM PARTIAL-REL PHYS-INFO RR-STATUS SYS-INFO-T1 SYS-INFO-T2 SYS-INFO-T3 SYS-INFO-T4 SYS-INFO-T5 SYS-INFO-T6

29 2F 17 10 0D 35 32 16 14 2B 2C 28 3F 39 3A 15 21 22 24 27 0F 0A 2D 12 19 1A 1B 1C 1D 1E

Assignment complete. Assignment failure. Channel mode modify acknowledge. Channel mode modify. Channel release. Ciphering mode command. Ciphering mode complete. Classmark change. Frequency redefinition. Handover command. Handover complete. Handover failure. Immediate assignment. Immediate assignment extended. Immediate assignment reject. Measurement report. Paging request type 1. Paging request type 2. Paging request type 3. Paging response. Partial release complete. Partial release. Physical layer information. RR status. System information type 1. System information type 2. System information type 3. System information type 4. System information type 5. System information type 6.

DTAP Mobility Management messages Standard reference: GSM 04-08 § 4, §9.2, §10.4, MSC to BSS - Layer 3 DTAP (Direct Transfer Application Part) Mobility Management messages , for a GSM A interface located between the MSC (mobile service switching centre) and the BSS (base station system or radio sub-system) are listed and ordered according to their hexadecimal code or their type (abreviation). Message list: hex codes Code 01 02 04

Abreviation IMSI-DET-IND LOC-UPD-ACC LOC-UPD-REJ

DTAP Mobility Management message IMSI detach indication. Location updating accept. Location updating reject.

08 11 12 14 18 19 1A 1B 21 22 26 28 31

LOC-UPD-REQ Location updating request. AUTHENT-REJ Authentication reject. AUTHENT-REQ Authentication request. AUTHENT-RESP Authentication response. IDENTITY-REQ Identity request. IDENTITY-RESP Identity response. TMSI-REA-COMM Temporary mobile identity reallocation command. TMSI-REA-COMP Temporary mobile identity reallocation complete. CM-SERV-ACC Connection management service accept. CM-SERV-REJ Connection management service reject. CM-SERV-REQ Connection management service request. CM-REESTABL Connection management re-establishment request. MM-STATUS Status.

Message list: types Abreviation AUTHENT-REJ AUTHENT-REQ AUTHENT-RESP CM-REESTABL CM-SERV-ACC CM-SERV-REJ CM-SERV-REQ IDENTITY-REQ IDENTITY-RESP IMSI-DET-IND LOC-UPD-ACC LOC-UPD-REJ LOC-UPD-REQ MM-STATUS TMSI-REA-COMM TMSI-REA-COMP

Code DTAP Mobility Management message 11 Authentication reject. 12 Authentication request. 14 Authentication response. 28 Connection management re-establishment request. 21 Connection management service accept. 22 Connection management service reject. 26 Connection management service request. 18 Identity request. 19 Identity response. 01 IMSI detach indication. 02 Location updating accept. 04 Location updating reject. 08 Location updating request. 31 Status. 1A Temporary mobile identity reallocation command. 1B Temporary mobile identity reallocation complete.