華為解決方案：MF001002 BSS信令詳解ISSUE1.0

1、課程 MF001002BSS接口信令詳解ISSUE1.0目 錄課程說明1課程介紹1課程目標1相關資料1第1章 A-Interface Key Messages1-11.1 Message Contents1-21.1.1 ASSIGNMENT REQUEST1-21.1.2 ASSIGNMENT COMPLETE1-31.1.3 ASSIGNMENT FAILURE1-41.1.4 HANDOVER REQUEST1-51.1.5 HANDOVER REQUEST ACKNOWLEDGE1-71.1.6 HANDOVER REQUIRED1-81.1.7 HANDOVER REQUIRED R

2、EJECT1-91.1.8 HANDOVER COMMAND1-101.1.9 HANDOVER COMPLETE1-101.1.10 HANDOVER FAILURE1-101.1.11 HANDOVER PERFORMED1-111.1.12 PAGING1-121.1.13 CLEAR REQUEST1-131.1.14 CLEAR COMMAND1-131.1.15 CLASSMARK REQUEST1-141.1.16 CLASSMARK UPDATE1-141.1.17 CIPHER MODE COMMAND1-141.1.18 CIPHER MODE COMPLETE1-151.

3、1.19 CIPHER MODE REJECT1-151.1.20 COMPLETE LAYER 3 INFORMATION1-161.2 Signaling element coding1-161.3 Message Type1-191.3.1 Channel Type1-221.3.2 Layer 3 Header Information1-301.3.3 Priority1-301.3.4 Circuit Identity Code1-311.3.5 Downlink DTX Flag1-321.3.6 Interference Band To Be Used1-321.3.7 Clas

4、smark Information Type 21-331.3.8 Group Call Reference1-331.3.9 Talker Flag1-341.3.10 LSA Access Control Suppression1-341.3.11 RR Cause1-341.3.12 Cell Identifier1-341.3.13 Chosen Channel1-361.3.14 Chosen Encryption Algorithm1-381.3.15 Circuit Pool1-381.3.16 Speech Version1-431.3.17 LSA Identifier1-4

5、31.3.18 Cause1-431.3.19 Circuit Pool List1-471.3.20 Encryption Information1-471.3.21 Classmark Information Type 11-481.3.22 Classmark Information Type 31-491.3.23 Current Channel Type 11-491.3.24 LSA Information1-501.3.25 Old BSS to New BSS information1-521.3.26 Configuration Evolution Indication1-5

6、31.3.27 Response Request1-531.3.28 Cell Identifier List1-541.3.29 Queuing Indicator1-581.3.30 Layer 3 Information1-591.3.31 IMSI1-591.3.32 TMSI1-591.3.33 Channel Needed1-601.3.34 eMLPP Priority1-601.3.35 Cipher Response Mode1-611.3.36 Layer 3 Message Contents1-611.3.37 LSA Identifier List1-611.3.38

7、APDU1-62第2章 Abis-Interface Key Messages2-632.1 Message Contents2-632.1.1 CHANNEL REQUIRED2-632.1.2 PAGING COMMAND2-642.1.3 CHANNEL ACTIVATION2-642.1.4 CHANNEL ACTIVATION ACKNOWLEDGE2-662.1.5 CHANNEL ACTIVATION NEGATIVE ACKNOWLEDGE2-672.1.6 IMMEDIATE ASSIGN COMMAND2-672.1.7 CONNECTION FAILURE INDICAT

8、ION2-672.1.8 ERROR INDICATION2-682.1.9 ENCRYPTION COMMAND2-682.1.10 HANDOVER DETECTION2-692.1.11 MODE MODIFY2-692.1.12 MODE MODIFY ACKNOWLEDGE2-702.1.13 MODE MODIFY NEGATIVE ACKNOWLEDGE2-702.1.14 ESTABLISH INDICATION2-702.2 Signaling element coding2-712.2.1 Message discriminator2-712.2.2 MESSAGE TYP

9、E2-722.2.3 Channel Number2-742.2.4 Request Reference2-752.2.5 Access Delay2-752.2.6 Physical Context2-752.2.7 Paging Group2-762.2.8 MS Identity2-762.2.9 Channel Needed2-762.2.10 eMLPP Priority2-772.2.11 Activation Type2-772.2.12 Channel Mode2-782.2.13 Channel Identification2-802.2.14 Encryption info

10、rmation2-812.2.15 Handover reference2-822.2.16 BS Power2-822.2.17 MS Power2-822.2.18 Timing Advance2-832.2.19 MS Power Parameters2-832.2.20 BS Power Parameters2-842.2.21 SACCH Information2-842.2.22 UIC2-852.2.23 Main channel reference2-862.2.24 MultiRate configuration2-862.2.25 MultiRate Control2-86

11、2.2.26 Supported Code Types2-872.2.27 Frame Number2-892.2.28 Cause2-892.2.29 Full Immediate Assign Info2-932.2.30 Link Identifier2-942.2.31 RLM Cause2-942.2.32 L3 Information (message name)2-95課程說明課程介紹本課程介紹了GSM系統(tǒng)中A接口、Abis接口的各種消息的格式、各域的含義及用途，是學習GSM系統(tǒng)的基礎。本課程的主要內容如下：A接口消息匯總、各消息內容詳細解釋。Abis接口消息匯總、各消息內容詳細

12、解釋。課程目標完成本課程的學習后，您應該能夠： l 掌握各信令的組成和用途l 能夠結合信令內容，分析網絡問題相關資料BSS信令分析手冊V4.0Chapter 1 A-Interface Key MessagesThere is no general rule for the order of signaling elements: it happens that the same elements appear in various orders depending on the message. The messages of A-interface described here are b

13、ased on Phase 2+ GSM 0808 version 7.6.0 Release 1998.The key BSSMAP messages are listed in the following table:Message nameReferenceASSIGNMENT REQUEST1.1.1ASSIGNMENT COMPLETE1.1.2ASSIGNMENT FAILURE1.1.3HANDOVER REQUEST1.1.4HANDOVER REQUEST ACKNOWLEDGE1.1.5HANDOVER REQUIRED1.1.6HANDOVER REQUIRED REJE

14、CT1.1.7HANDOVER COMMAND1.1.8HANDOVER COMPLETE1.1.9HANDOVER FAILURE1.1.10HANDOVER PERFORMED1.1.11PAGING1.1.12CLEAR REQUEST1.1.13CLEAR COMMAND1.1.14CLASSMARK REQUEST1.1.15CLASSMARK UPDATE1.1.16CIPHER MODE COMMAND1.1.17CIPHER MODE COMPLETE1.1.18CIPHER MODE REJECT1.1.19COMPLETE LAYER 3 INFORMATION1.1.20

15、1.1 Message Contents1.1.1 ASSIGNMENT REQUESTThis message is sent from the MSC to the BSS via the relevant SCCP connection in order to request the BSS to assign radio resource(s), the attributes of which are defined within the message.The message may also include the terrestrial circuit to be used.IN

16、FORMATION ELEMENTREFERENCEDIRECTIONTYPELENMessage Type1.2.1MSC-BSS M1Channel Type1.2.2MSC-BSS M5-10Layer 3 Header Information1.2.3MSC-BSS O (3) 4Priority1.2.4MSC-BSS O3Circuit Identity Code 1.2.5MSC-BSS O (1) 3Downlink DTX Flag 1.2.6MSC-BSS O (2)2Interference Band To Be Used1.2.7MSC-BSS O2Classmark

17、Information 2 1.2.8MSC-BSS O (4)4-5Group Call Reference1.2.9MSC-BSS O (5)3-8Talker Flag 1.2.10MSC-BSS O (6)1LSA Access Control Suppression1.2.11MSC-BSSO (8)21. This element is included when the MSC allocates the A-interface circuits and the channel type Information Element indicates speech or data,

18、and only in those cases.2. This element may be included in the case of a speech TCH, and only in this case. If not included, this has no impact on the DTX function in the BSS.3. This information element doesnt serve any useful purpose. MSCs should not send the information element unless it is requir

19、ed by the recipients (due to the need to interwork with older versions of the protocol). It is expected that in future versions of 08.08, this information element will be deleted from this message.4. These elements may be included if the information is known by the MSC.5. This may be included by the

20、 MSC for either a talking or listening subscriber in a group call.6. This information element is included for group calls, when this is included it indicates that the mobile is a talker in the call else the mobile is a listener.7. The information is indicated by the MSC if known.8. This information

21、element is included if LSA access control function shall be suppressed in the BSS.1.1.2 ASSIGNMENT COMPLETEThe ASSIGNMENT COMPLETE message is sent from the BSS to the MSC and indicates that the requested assignment has been completed correctly.The message is sent via the BSSAP SCCP connection associ

22、ated with the dedicated resource(s). INFORMATION ELEMENT REFERENCEDIRECTIONTYPELENMessage Type 1.2.1 BSS-MSC M1RR Cause 1.2.12 BSS-MSC O2Circuit Identity Code 1.2.5 BSS-MSC O (4)3Cell Identifier 1.2.13 BSS-MSC O (1) 3-10Chosen Channel 1.2.14 BSS-MSC O (3)2Chosen Encryption Algorithm 1.2.15 BSS-MSC O

23、 (5)2Circuit Pool 1.2.16 BSS-MSC O (2)2Speech Version (Chosen) 1.2.17 BSS-MSC O (6)2LSA Identifier 1.2.18 BSS-MSC O (7)51. The cell identifier is used to indicate a new cell, if during the assignment the serving cell has changed.2. Shall be included when several circuit pools are present on the BSS

24、MSC interface and a circuit was allocated by the ASSIGNMENT REQUEST message.3. Included at least when the channel rate/type choice was done by the BSS.4. The Circuit Identity Code information element is included mandatory by the BSS if the BSS allocates the A-interface circuits and a circuit is need

25、ed.5. Included at least when the encryption algorithm has been changed by the BSS.6. Included at least when the speech version choice was done by the BSS.7. Shall be included if current LSA in the serving cell has been identified (see GSM 03.73). Not included means that there is no current LSA in th

26、e serving cell.1.1.3 ASSIGNMENT FAILUREThe ASSIGNMENT FAILURE message is sent from the BSS to the MSC via the relevant SCCP connection. It indicates that there has been a failure in the assignment process at the BSS and that the assignment procedure has been aborted.INFORMATION ELEMENT REFERENCEDIRE

27、CTIONTYPELENMessage Type 1.2.1 BSS-MSC M 1 Cause 1.2.19 BSS-MSC M 3-4 RR Cause 1.2.12 BSS-MSC O 2 Circuit Pool 1.2.16 BSS-MSC O (1)2Circuit Pool List 1.2.20 BSS-MSC O (2)V1. Shall be included when several circuit pools are present on the BSS MSC interface.2. May be included when cause is circuit poo

28、l mismatch or switch circuit pool to indicate circuit pool preferences.Typical Cause values are:-radio interface message failure,-O and M intervention,-equipment failure,-no radio resource available,-requested terrestrial resource unavailable,-requested transcoding/rate adaption unavailable,-terrest

29、rial resource already allocated,-invalid message contents,-radio interface failure - reversion to old channel,-directed retry,-circuit pool mismatch,-switch circuit pool.requested speech version unavailable.1.1.4 HANDOVER REQUESTThis message is sent from the MSC to the BSS via the relevant SCCP conn

30、ection to indicate that the MS is to be handed over to that BSS.INFORMATION ELEMENTREFERENCEDIRECTIONTYPELENMessage Type 1.2.1 MSC-BSS M 1 Channel Type 1.2.2 MSC-BSS M5-10 Encryption Information 1.2.21 MSC-BSS M (1)3-nClassmark Information 1 Or 1.2.22 MSC-BSS M# 2 Classmark Information 2 1.2.8 MSC-B

31、SS M (6) 4-5 Cell Identifier (Serving) 1.2.13 MSC-BSS M5-10 Priority 1.2.4 MSC-BSS O 3 Circuit Identity Code 1.2.5 MSC-BSS O (7) 3 Downlink DTX Flag 1.2.6 MSC-BSS O (3) 2 Cell Identifier (Target) 1.2.13 MSC-BSS M3-10 Interference Band To Be Used 1.2.7 MSC-BSS O 2 Cause 1.2.19 MSC-BSS O (9) 3-4 Class

32、mark Information 3 1.2.23 MSC-BSS O (4) 3-14Current Channel type 1 1.2.24 MSC-BSS O (8) 2 Speech Version (Used) 1.2.17 MSC-BSS O (10)2Group Call Reference 1.2.9 MSC-BSS O (5) 3-8Talker Flag 1.2.10 MSC-BSS O (11)1Configuration Evolution Indication 1.2.27 MSC-BSS O (12)2Chosen Encryption Algorithm (Se

33、rving) 1.2.15 MSC-BSS O (2)2Old BSS to New BSS Information 1.2.26 MSC-BSS O(13)2-nLSA Information 1.2.25 MSC-BSS O(14)3+4nLSA Access Control Suppression 1.2.11 MSC-BSS O (15) 21. If the MSC has not sent a CIPHER MODE COMMAND for this RR connection (or has had all such CIPHER MODE COMMANDs rejected w

34、ith CIPHER MODE REJECT messages) then the MSC shall indicate that the only “permitted algorithm” is “no encryption”.2. If this information element is included, it shall be equal to the last received “Chosen Encryption Algorithm” information element.3. This element may be included in the case of a sp

35、eech TCH, and only in this case. If not included, this has no impact on the DTX function in the BSS.4. This element is included if the MSC has received such information.5. This element is included if the MS is in a voice broadcast or voice group call.6. One of these two elements is sent.7. This elem

36、ent is included when the channel type Information Element indicates speech or data, and only in those cases.8. This element is included at least when the message is sent as a reaction to reception of a HANDOVER REQUIRED message containing a “Current channel type 1” information element. In this case

37、it shall be equal to the received element.9. This information element should always be included. Its cause value should be the same as indicated in the corresponding Handover Required message.10. This element is included at least when the message is sent as a reaction to reception of a HANDOVER REQU

38、IRED message containing a “Speech version (used)” information element. In this case it shall be equal to the received element.11. This information element is included for voice group call, when this is included it indicates that the mobile is a talker in the call else the mobile is a listener.12. Th

39、e information is indicated by the MSC if known 13. This element is included if and only if the message is sent as a reaction to the reception of a HANDOVER REQUIRED message containing an “old BSS to new BSS information” information element. Its contents shall be equal to the received element.14. Thi

40、s information element is included when the subscriber has localized service area support.15. This information element is included if LSA access control function shall be suppressed in the BSS.Typical Cause values are:-uplink quality,-uplink strength,-downlink quality,-downlink strength-distance,-bet

41、ter cell,-response to MSC invocation-O and M intervention,-directed retry,-switch circuit pool,-traffic,-preemption.1.1.5 HANDOVER REQUEST ACKNOWLEDGEThis message is sent from the BSS to the MSC and indicates that the request to support a handover at the target BSS can be supported by the BSS, and a

42、lso to which radio channel(s) the MS should be directed.The message is sent via the BSSAP SCCP connection associated with the dedicated resource.INFORMATION ELEMENTREFERENCEDIRECTIONTYPELENMessage Type 12.1 BSS-MSC M 1 Layer 3 Information 1.2.3 BSS-MSC M (1)11-n Chosen Channel 1.2.14 BSS-MSC O (4) 2

43、 Chosen Encryption Algorithm 1.2.15 BSS-MSC O (5) 2 Circuit Pool 1.2.16 BSS-MSC O (2) 2 Speech Version (Chosen) 1.2.17 BSS-MSC O (6) 2 Circuit Identity Code 1.2.5 BSS-MSC O (3) 3 LSA Identifier 1.2.18 BSS-MSC O (7)51. This information field carries a radio interface HANDOVER COMMAND message.2. Shall

44、 be included when several circuit pools are present on the BSS MSC interface and a circuit was allocated by the HANDOVER REQUEST message.3. The Circuit identity code information element is included mandatory by the BSS if the BSS allocates the A-interface circuits and a circuit is needed.4. Included

45、 at least when the channel rate/type choice was done by the BSS.5. Included at least when the encryption algorithm has been selected by the BSS.6. Included at least when the speech version choice was done by the BSS.7. Shall be included if a new potential current LSA in the target cell has been iden

46、tified (see GSM 03.73). Not included means that there is no potential current LSA in the target cell.1.1.6 HANDOVER REQUIREDThis message is sent from the BSS to the MSC to indicate that for a given MS which already has dedicated radio resource(s) assigned, a handover is required for the reason given

47、 by the cause element.The message is sent via the BSSAP SCCP connection associated with the dedicated resource(s).INFORMATION ELEMENTREFERENCEDIRECTIONTYPELENMessage Type 1.2.1 BSS-MSC M1Cause 1.2.19 BSS-MSC M 3-4 Response Request 1.2.28 BSS-MSC O1Cell Identifier List 1.2.29 BSS-MSC M2n+3 (Preferred

48、) to 7n+3 Circuit Pool List 1.2.20 BSS-MSC O (1) VCurrent Channel Type 1 1.2.24 BSS-MSC O (2)2Speech Version (Used) 1.2.17 BSS-MSC O (3)2Queuing Indicator 1.2.30 BSS-MSC O2Old BSS to New BSS Information 1.2.26BSS-MSCO2-n1. Shall be included when cause switch circuit pool and the MSC allocates the A-

49、interface circuit.2. This information element should always be included.3. This information element should always be included when the channel mode is speech, and only in this case.Typical Cause values are:-uplink quality,-uplink strength,-downlink quality,-downlink strength,-distance,-better cell,-

50、response to MSC invocation,-O&M intervention,-directed retry,-switch circuit pool,-traffic,-preemption.1.1.7 HANDOVER REQUIRED REJECTThis message is sent from the MSC to the BSS via the relevant SCCP connection. It indicates to the BSS that the HANDOVER REQUIRED message has not resulted in handover.

51、 INFORMATION ELEMENT REFERENCEDIRECTIONTYPELENMessage Type 1.2.1 MSC-BSS M 1 Cause 1.2.19 MSC-BSS M 3-4 Typical Cause values are:-equipment failure,-no radio resource available,-requested terrestrial resource unavailable,-invalid message contents,-requested transcoding/rate adaptation unavailable,-O

52、 and M intervention.1.1.8 HANDOVER COMMANDThis message is sent from the MSC to the BSS via the relevant SCCP connection and contains the target channel to which the MS should retune.INFORMATION ELEMENTREFERENCEDIRECTIONTYPELENMessage Type 1.2.1 MSC-BSS M 1 Layer 3 Information 1.2.31 MSC-BSS M (1)11-

53、n Cell Identifier 1.2.13 MSC-BSS O3-10 This information field carries a radio interface HANDOVER COMMAND message.1.1.9 HANDOVER COMPLETEThis message is sent from the BSS to the MSC via the relevant SCCP connection.It indicates that the correct MS has successfully accessed the target cell.INFORMATION

54、 ELEMENTREFERENCEDIRECTIONTYPELENMessage Type 1.2.1 BSS-MSC M1RR Cause 1.2.12 BSS-MSC O21.1.10 HANDOVER FAILURE This message is sent from the BSS to the MSC via the relevant SCCP connection. It indicates to the MSC that there has been a failure in the resource allocation process on handover, and that the handover has been aborted.INFORMATION E