mf001002 bss信令详解issue10辅导讲义Word格式.docx

1、1.3 Message Type 1-191.3.1 Channel Type 1-221.3.2 Layer 3 Header Information 1-301.3.3 Priority 1-301.3.4 Circuit Identity Code 1-311.3.5 Downlink DTX Flag 1-321.3.6 Interference Band To Be Used 1-321.3.7 Classmark Information Type 2 1-331.3.8 Group Call Reference 1-331.3.9 Talker Flag 1-341.3.10 LS

2、A Access Control Suppression 1-341.3.11 RR Cause 1-341.3.12 Cell Identifier 1-341.3.13 Chosen Channel 1-361.3.14 Chosen Encryption Algorithm 1-381.3.15 Circuit Pool 1-381.3.16 Speech Version 1-431.3.17 LSA Identifier 1-431.3.18 Cause 1-431.3.19 Circuit Pool List 1-471.3.20 Encryption Information 1-4

3、71.3.21 Classmark Information Type 1 1-481.3.22 Classmark Information Type 3 1-491.3.23 Current Channel Type 1 1-491.3.24 LSA Information 1-501.3.25 Old BSS to New BSS information 1-521.3.26 Configuration Evolution Indication 1-531.3.27 Response Request 1-531.3.28 Cell Identifier List 1-541.3.29 Que

4、uing Indicator 1-581.3.30 Layer 3 Information 1-591.3.31 IMSI 1-591.3.32 TMSI 1-591.3.33 Channel Needed 1-601.3.34 eMLPP Priority 1-601.3.35 Cipher Response Mode 1-611.3.36 Layer 3 Message Contents 1-611.3.37 LSA Identifier List 1-611.3.38 APDU 1-62第2章 Abis-Interface Key Messages 2-632.1 Message Con

5、tents 2-632.1.1 CHANNEL REQUIRED 2-632.1.2 PAGING COMMAND 2-642.1.3 CHANNEL ACTIVATION 2-642.1.4 CHANNEL ACTIVATION ACKNOWLEDGE 2-662.1.5 CHANNEL ACTIVATION NEGATIVE ACKNOWLEDGE 2-672.1.6 IMMEDIATE ASSIGN COMMAND 2-672.1.7 CONNECTION FAILURE INDICATION 2-672.1.8 ERROR INDICATION 2-682.1.9 ENCRYPTION

6、 COMMAND 2-682.1.10 HANDOVER DETECTION 2-692.1.11 MODE MODIFY 2-692.1.12 MODE MODIFY ACKNOWLEDGE 2-702.1.13 MODE MODIFY NEGATIVE ACKNOWLEDGE 2-702.1.14 ESTABLISH INDICATION 2-702.2 Signaling element coding 2-712.2.1 Message discriminator 2-712.2.2 MESSAGE TYPE 2-722.2.3 Channel Number 2-742.2.4 Requ

7、est Reference 2-752.2.5 Access Delay 2-752.2.6 Physical Context 2-752.2.7 Paging Group 2-762.2.8 MS Identity 2-762.2.9 Channel Needed 2-762.2.10 eMLPP Priority 2-772.2.11 Activation Type 2-772.2.12 Channel Mode 2-782.2.13 Channel Identification 2-802.2.14 Encryption information 2-812.2.15 Handover r

8、eference 2-822.2.16 BS Power 2-822.2.17 MS Power 2-822.2.18 Timing Advance 2-832.2.19 MS Power Parameters 2-832.2.20 BS Power Parameters 2-842.2.21 SACCH Information 2-842.2.22 UIC 2-852.2.23 Main channel reference 2-862.2.24 MultiRate configuration 2-862.2.25 MultiRate Control 2-862.2.26 Supported

9、Code Types 2-872.2.27 Frame Number 2-892.2.28 Cause 2-892.2.29 Full Immediate Assign Info 2-932.2.30 Link Identifier 2-942.2.31 RLM Cause 2-942.2.32 L3 Information （message name） 2-95课程说明课程介绍本课程介绍了GSM系统中A接口、Abis接口的各种消息的格式、各域的含义及用途，是学习GSM系统的基础。本课程的主要内容如下：A接口消息汇总、各消息内容详细解释。Abis接口消息汇总、各消息内容详细解释。课程目标完成本

10、课程的学习后，您应该能够： 掌握各信令的组成和用途 能够结合信令内容，分析网络问题相关资料BSS信令分析手册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 based on Phase

11、 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 REJECT1.1.7HANDOV

12、ER 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 INFORMATION1.1.201.1 Message C

13、ontents1.1.1 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.INFORMATION ELE

14、MENTREFERENCEDIRECTIONTYPELENMessage Type1.2.1MSC-BSS M1Channel Type1.2.25-10Layer 3 Header Information1.2.3O （3） 4Priority1.2.4O3Circuit Identity Code 1.2.5O （1） Downlink DTX Flag 1.2.6O （2）2Interference Band To Be Used1.2.7Classmark Information 2 1.2.8O （4）4-5Group Call Reference1.2.9O （5）3-8Talke

15、r Flag 1.2.10O （6）LSA Access Control Suppression1.2.11MSC-BSSO （8）1. This element is included when the MSC allocates the A-interface circuits and the channel type Information Element indicates speech or data, and only in those cases.2. This element may be included in the case of a speech TCH, and on

16、ly 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 required by the recipients （due to the need to interwork with older versions of the protocol）. It

17、 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 MSC for either a talking or listening subscriber in a group call.6. This information eleme

18、nt 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 element is included if LSA access control function shall be suppressed in the BSS.1.1.2 ASS

19、IGNMENT 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 associated with the dedicated resource（s）. INFORMATION ELEMENT 1.2.1 BSS-MSC MRR Cause 1.2.12 OCi

20、rcuit Identity Code 1.2.5 BSS-MSC O （4）Cell Identifier 1.2.13 O （1） 3-10Chosen Channel 1.2.14 O （3）Chosen Encryption Algorithm 1.2.15 O （5）Circuit Pool 1.2.16 O （2）Speech Version （Chosen） 1.2.17 O （6）LSA Identifier 1.2.18 O （7）51. The cell identifier is used to indicate a new cell, if during the ass

21、ignment the serving cell has changed.2. Shall be included when several circuit pools are present on the BSS 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

22、element is included mandatory by the BSS if the BSS allocates the A-interface circuits and a circuit is needed.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

23、 the serving cell has been identified （see GSM 03.73）. Not included means that there is no current LSA in the 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 assign

24、ment process at the BSS and that the assignment procedure has been aborted.INFORMATION ELEMENT 1 Cause 1.2.19 3-4 1.2.12 2 O （1）Circuit Pool List 1.2.20V1. Shall be included when several circuit pools are present on the BSS MSC interface.2. May be included when cause is circuit pool mismatch or swit

25、ch 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,- terrestrial resour

26、ce 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 connection to indicate that the MS is to be handed over to that BSS. MSC-BSS 1.2.25-10 Encryption Information 1.2.21 M （1）3-nClassmark Information 1 Or 1.2.22 M# 1.2.8 M （