1、INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.2931 Amendment 4 (1 211 999) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN - B-ISDN application protocols for access Sig na I ling Digital Subscriber Signalling System No. 2 - User- Network Interface (U
2、NI) Layer 3 specification for basic calkonnection control Amendment 4 ITU-T Recommendation Q.2931 - Amendment 4 (Formerly CCITT Recommendation) IPN= 4862591 0689853 35T SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SP
3、ECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM RI SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYST
4、EM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK SIGNALLING REQWREMENTS AND PROTOCOLS FOR IMT-2000 BROADBAND ISDN DITERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS General aspects Signalling ATM adaptatio
5、n layer (SAAL) Signalling network protocols Common aspects of B-ISDN application protocols for access signalling and network signalling and interworking Q.i-Q.3 4.4-4.59 Q.6O-Q.99 Q. lOO-Q.119 Q. 12O-Q.249 Q.25O-Q.309 4.3 i 04.399 Q.40O-Q.499 Q.50O-Q.599 Q.60O-Q.699 Q.70O-Q.849 Q.85O-Q.999 Q.iOOO-Q.
6、1099 Q.ilOO-Q.1199 Q. 1200-4.1 699 Q.170O-Q.1799 Q.200O-Q.2999 Q.200O-Q.2099 Q.210O-Q.2199 4.2200-4.2299 Q.260O-Q.2699 B-ISDN application protocols for the network signalling Q.270O-Q.2899 42 For *her details, please rejr to the list of ITU-T Recommendations, IPN= 4862591 0689854 296 Digitai Subscri
7、ber Signalling System No. 2 - User-Network Interface (NI) Layer 3 specification for basic calyconnection control AMENDmNT4 Summary ITU-T Recommendation 4.293 1 provides basic call and connection control for point-to-point connections in a B-ISDN. This amendment to ITU-T Recommendation 4.293 1 has be
8、en prepared to reflect changes, clarifications and additions to the basic calllconnection control messages and procedures of DSS2. The changes are based on errors and inconsistencies identified in ITU-T Recommendation 4.2931 since its first publication in 1995. This amendment is designed to be compa
9、tible with implementations conforming to ITU-T Recommendation 4.293 1 (02/95) and Amendments 1,2 and 3 to ITU-T 4.293 1. Source Amendment 4 to ITU-T Recommendation 4.2931 was prepared by -T Study Group 11 (1997-2000) and approved under the WTSC Resolution 1 procedure on 3 December 1999. ITU-T Q.293U
10、Amd.4 (1211999) i IPN= 4862591 0689855 122 FOREWORD The International Telecommunication Union is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of IT. ITU-T is responsible for studying technical,
11、 operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T study groups which, in
12、turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSC Resolution 1. In some areas of information technology which fail within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. N
13、OTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation ma
14、y involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of thi
15、s Recommendation, IT had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent datab
16、ase. o FU 2001 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing fiom the ITU. ITU-T Q.293UAmd.4 (12/1999) 11 IPN= 4862591 0689856 069 This amendmen
17、t to ITU-T Recommendation 4.2931 has been prepared to reflect changes, clarifications and additions to the basic calVconnection control messages and procedures of DSS2. The changes are based on errors and inconsistencies identified in IT-T Recommendation 4.2931 since its first publication in 1995. T
18、his amendment is designed to be compatible with implementations conforming to ITU-T Recommendation 4.2931 (02/95) and Amendments 1, 2 and 3 to ITU-T 4.293 1. ITU-T Q.293UAmd.4 (12/1999) . 111 IPN= 4862591 0689857 lT5 Digital Subscriber Signalling System No. 2 - User-Network Interface (UNI) Layer 3 s
19、pecification for basic caWconnection control AMENDMENT4 Replace and add the following existing or new subclauses and annexes with the text presented in this amendment according to the following table of contents: Revised subclause 1.3.1 UQ.293 1 Scope/UNI ATM addressing Revised subclause 1.3.12/Q.29
20、3 1 ScopeEnd-to-end compatibility parameter ind Revised subclause 3. VQ.293 1 Messages for B-ISDN call and connection control Revised subclause 3.1. UQ.293 1 Alerting message Revised subclause 3.1.3/Q.293 1 Connect message Revised subclause 3.1.7/Q.293 1 Setup message New subclause 3.1.1 UQ.293 1 Co
21、nnection available message Revised subclause 3.2/Q.293 1 Messages related to support of n-b services Revised subclause 3.2.1/Q.293 1 Alerting message Revised subclause 3.2.3/Q.293 1 Connect message Revised subclause 3.2.7/Q.293 1 Setup message Revised Table 4-2/Q.293 1 Message types Revised Table 4-
22、3/Q.293 1 Information element identifiers Revised subclause 4.5.6/Q.293 1 ATM traffic descriptor IE Revised subclause 4.5.WQ.293 1 Broadband high layer information E Revised subclause 4.5.9/Q.293 1 Broadband low layer information IE Revised subclause 4.5.1 UQ.293 1 Called party number IE Revised sub
23、clause 4.5.12/Q.293 1 Called party sub-address IE Revised subclause 4.5.1314.293 1 Calling party number IE Revised subclause 4.5.14/Q.293 1 Calling party sub-address E Revised subclause 4.5.17/Q.293 1 End-to-end transit delay IE Revised subclause 4.5.22/Q.293 1 Transit network selection E Revised su
24、bclause 4.5.23/Q.293 1 Notification indicator IE New subclause 4.5.2YQ.293 1 Broadband report type IE 1 ITU-T Q.293UAmd.4 (12/1999) IPN= 4862591 0689859 878 Revised subclause 5.1.3/Q.293 1 QoS and trafic parameters selection procedures Revised subclause 5.2.3/Q.293 1 Connection identifier allocatior
25、dselection procedures Revised subclause 5.2.4/Q.293 1 QoS and traffic parameter selection procedures Revised subclause 5.6.3/Q.293 1 Call reference error procedures Revised subclause 5.6.WQ.293 1 Information element error procedures Revised subclause 5.7.2/Q.293 1 Information element error procedure
26、s New subclause 6.3.6/Q.293 1 Mapping of clearing messages Revised subclause 6.4.5/Q.293 1 Mapping of cause information New subclause 6.4.6/Q.293 1 Mapping of clearing messages Revised subclause 6.6.2/Q.293 1 Notification of interworking at terminating interface New subclause 6.WQ.293 1 Indication o
27、f using recovered clock for transmission Revised Annex UQ.293 1 B-LLI negotiation Revised Annex E/Q.293 1 Mapping of and interworking with N-ISDN Revised Annex F/Q.293 1 AAL parameters indication and negotiation Revised Annex J.3/Q.293 1 References Revised Annex WQ.293 1 Handling of end-to-end trans
28、it delay E New Annex MQ.293 1 Indication of using recovered clock for transmission New Annex N/Q.293 1 End-to-end completion indication procedures Revised Appendix VQ.293 1 Guidelines for the use of Instruction indicators The differences from ITU-T Recommendation 4.2931 (02/95) and Amendments 1, 2 a
29、nd 3 to 4.2931 are marked to emphasize the compatibility of this amendment with the original publication of this ITU-T Recommendation. 2 ITU-T Q.293UAmd.4 (12/1999) IPN= 4862591 0689860 59T 1.3.11 Support of public UNI ATM addressing I The Release 1 Signalling protocol specified in this ITU-T Recomm
30、endation supports a number of ATM address formats to be used across the Public UNI to unambiguously identi the endpoints in I an ATM connection (see ITU-T Recommendation E. 19 1). I 2) Revised subclause 1.3.12/Q.2931 Scopemnd-to-end compatibility parameter ind. 1.3.12 Support of end-to-end compatibi
31、lity parameter identification On a per-connection basis, the following end-to-end compatibility parameters can be specified: I 1) The AAL type (e.g. Types 1,33/4, or 5). 2) The method of protocol multiplexing (e.g. LLC vs. VC) and AAL parameter. 3) For VC-based multiplexing, the protocol which is en
32、capsulated (e.g. any of the list of known routed protocols or bridged protocols). 4) Protocols above the network layer. Message Reference Call establishment messages: ALERTING 3.1.1 CALL PROCEEDING 3.1.2 CONNECT 3.1.3 CONNECT ACKNOWLEDGE 3.1.4 CONNECTION AVAlLABLE 3.1.11 SETUP 3.1.7 Call clearing me
33、ssages: RELEASE 3.1.5 RELEASE COMPLETE 3.1.6 3) Revised subclause 3.UQ.2931 Messages for B-ISDN call and connection control 3.1 Table 3-1 summarizes the messages for B-ISDN call or connection control. Messages for B-ISDN call and connection control Table 3-UQ.2931- Messages for B-ISDN call and conne
34、ction control _ Miscellaneous messages: NOTIFY STATUS STATUS ENQUIRY 3.1.10 3.1.8 3.1.9 ITU-T Q.2931lAmd.4 (1211999) 3 iPN= 4862591 0689861 426 PROCESS 4.293 1 -U; I I b U1 tor- 1 N its interpretation by the network is optional. It is mandatory for the network to include the broadband sending comple
35、te information element when en bloc receiving procedures are used. If the broadband sending complete information element is not included, missing mandatory information element error procedures need not be applied. NOTE 14 - Included by the calling user to select a particular transit network (see Ann
36、ex D). This information element may appear four times in the message. NOTE 15 - Included when two AAL parameters information elements are included for AAL parameters type selection and negotiation. The broadband repeat indicator information element is included immediately before the first AAL parame
37、ters information element. NOTE 16 - Included in the user-to-network direction when the calling user wants to convey a broadband service-related notification to the called user. Included in the network-to-user direction if the calling user included a broadband report type information element in the S
38、ETUP message. This information element may appear twice in the message. 7) New subclause 3.1.1UQ.2931 Connection available message 3.1.11 Connection available This message is sent by the calling user to the network and by the network to the called user to confirm the availability of a connection. Se
39、e Table 3-24. ITU-T Q.293UAmd.4 (12/1999) 7 Table 3-24/Q.2931- CONNECTION AVAILABLE message content Message type Message length I I 8) 3.2 4.4 Both M 2 4.4 Both M 2 Message type: CONNECTION AVAILABLE Significance: Global Direction: Both Notification indicator Broadband report t-pe I Informationeleme
40、nt I Reference I Direction I Type I Length 4.5 Both O(Note i) 4.5 Both O Note2) 5. I Protocol discriminator I 4.2 I Both IM I1 I Call reference I 4.3 I Both IM 14 NOTE 1 - See Note 11 in Table 3-8. NOTE 2 - Included in the user-to-network direction when the calling user wants to convey a broadband s
41、ervice-related notification to the called user. Included in the network-to-user direction if the calling user included a broadband report type information element in the CONNECTION AVAILABLE message. Revised subclause 3.2/Q.2931 Messages related to support of n-b services Additional or modified mess
42、ages related for the support of 64 kbit/s based ISDN circuit-mode services Table 3-12 summarizes the messages for B-ISDN call or connection control for the support of 64 kbitls based ISDN circuit-mode services. Table 3-12/Q.2931- Messages related to interworking requirements Message Call establishme
43、nt messages: ALERTING CALL PROCEEDING CONNECT CONNECT ACKNOWLEDGE CONNECTION AVAILABLE PROGRESS SETUP SETUP ACKNOWLEDGE Call clearing messages: RELEASE RELEASE COMPLETE Miscellaneous messages: NOTIFY INFORMATION STATUS STATUS ENQUIRY Reference 3.2.1 3.2.2 3.2.3 3.1.4 3.1.11 3.2.5 3.2.7 3.2.8 3.2.6 3
44、.1.6 3.1.10 3.2.4 3.1.8 3.1.9 8 ITU-T Q.293UAmd.4 (12/1999) 9) Revised subclause 3.2.UQ.2931 Alerting message 3.2.1 Alerting This message is sent by the called user to the network and by the network to the calling user to indicate that called user alerting has been initiated. See Table 3- 13. Table
45、3-13/Q.2931- ALERTING message content Message type: ALERTING Significance: Global Direction: Both Information element Protocol discriminator Call reference Message type Message length Connection identifier Narrow-band bearer capability Narrow-band high layer compatibility Notification indicator Prog
46、ress indicator Broadband report t-pe Reference I Direction 4.2 4.3 4.4 4.4 4.5 4.6 4.6 4.5 4.6 4.5 Both Both Both Both u-n Both Both Both Both Both M M M M O (Note 1) O (Note 2) O (Note 3) O (Note 4) O (Note 5) O (Note 6) Length 1 4 2 2 4-9 4-14 4-7 4-* 4-6 - 5 NOTE 1 - Mandatory in the user-to-netw
47、ork direction if this message is the first message in response to a SETUP message, unless the user accepts the connection identifier indicated in the SETUP message. NOTE 2 - The narrow-band bearer capability information element is included when procedures for bearer capability selection are used as
48、defined in 5.1 UQ.931. When present, progress description No. 5, “interworking has occurred and has resulted in a telecommunication service change“ shall also be present. NOTE 3 - The narrow-band high layer compatibility information element is included when the procedures of 5.12/Q.931 for high laye
49、r compatibility selection apply. When present, progress description No. 5, “interworking has occurred and has resulted in a telecommunication service change“ shall also be present. NOTE 4 - This indicator may be present whenever notification is delivered. NOTE 5 - Included in the event of interworking. Included in the network-to-user direction in connection with the provision of in-band information/patterns. Included in the user-to-network direction in connection with the provision of in-band information/patterns if Annex WQ.93 1 is implemented or in accordance
