1、 International Telecommunication Union ITU-T Q.2931TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 5(01/2006) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN B-ISDN application protocols for access signalling Digital Subscriber Signalling System No. 2 User-Network Interface (UNI) layer 3
2、 specification for basic call/connection control Amendment 5: Support for the International Emergency Preference Scheme ITU-T Recommendation Q.2931 (1995) Amendment 5ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC
3、AND SEMI-AUTOMATIC WORKING Q.4Q.59 FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN Q.60Q.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4, 5, 6, R1 AND R2 Q.120Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.6
4、99 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 Q.850Q.999 PUBLIC LAND MOBILE NETWORK Q.1000Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREMENTS AND PROTOCOLS
5、 FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 General aspects Q.2000Q.2099 Signalling ATM adaptation layer (SAAL) Q.2100Q.2199 Signalling network protocols Q.2200Q.2299 Common aspects of B-ISDN appli
6、cation protocols for access signalling and network signalling and interworking Q.2600Q.2699 B-ISDN application protocols for the network signalling Q.2700Q.2899 B-ISDN application protocols for access signalling Q.2900Q.2999 For further details, please refer to the list of ITU-T Recommendations. ITU
7、-T Rec. Q.2931 (1995)/Amd.5 (01/2006) i ITU-T Recommendation Q.2931 Digital Subscriber Signalling System No. 2 User-Network Interface (UNI) layer 3 specification for basic call/connection control Amendment 5 Support for the International Emergency Preference Scheme Summary ITU-T Rec. Q.2931 provides
8、 basic call and connection control for point-to-point connections in a B-ISDN. This amendment was produced to meet the need for the implementation of the International Emergency Preference Scheme (IEPS) as specified in ITU-T Rec. E.106. It contains the modifications to ITU-T Rec. Q.2931 (1995) in or
9、der to accommodate these needs. This amendment is designed to be compatible with implementations conforming to ITU-T Rec. Q.2931 (1995) and its Amendments 1, 2, 3 and 4. Source Amendment 5 to ITU-T Recommendation Q.2931 (1995) was approved on 27 January 2006 by ITU-T Study Group 11 (2005-2008) under
10、 the WTSA Resolution 1 procedure. ii ITU-T Rec. Q.2931 (1995)/Amd.5 (01/2006) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. IT
11、U-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for st
12、udy by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a
13、 collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain
14、 certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requ
15、irements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Rig
16、ht. 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 this Recommendation, ITU had not received notice of intelle
17、ctual 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 database. ITU 2006 All rights reserved. No part of this publ
18、ication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. Q.2931 (1995)/Amd.5 (01/2006) iii CONTENTS Page 1) Clause 1.3 Capabilities supported by this Recommendation. 1 2) New clause 1.3.15 IEPS. 1 3) Clause 3.1.7 Set-up 1 4) Clause 3.2.7 Set-up 1 5)
19、 Clause 4.5.1 Coding rules 1 6) New clause 4.5.26 IEPS indicator . 2 7) New clause 5.10 International Emergency Preference Scheme 2 8) Clause J.2 Abbreviations . 3 9) Clause J.3 References 3 10) Appendix I Guidelines for the use of Instruction indicators 3 iv ITU-T Rec. Q.2931 (1995)/Amd.5 (01/2006)
20、 Introduction This amendment was produced to meet the need for the implementation of the International Emergency Preference Scheme (IEPS) as specified in ITU-T Rec. E.106. It contains the modifications to ITU-T Rec. Q.2931 (1995) in order to accommodate these needs. This amendment is designed to be
21、compatible with implementations conforming to ITU-T Rec. Q.2931 (1995) and its Amendments 1, 2, 3 and 4. ITU-T Rec. Q.2931 (1995)/Amd.5 (01/2006) 1 ITU-T Recommendation Q.2931 Digital Subscriber Signalling System No. 2 User-Network Interface (UNI) layer 3 specification for basic call/connection cont
22、rol Amendment 5 Support for the International Emergency Preference Scheme 1) Clause 1.3 Capabilities supported by this Recommendation Insert the following new capability: 15) IEPS 2) New clause 1.3.15 IEPS Add the following new clause: 1.3.15 IEPS To support IEPS in the signalling protocol, a mechan
23、ism based on signalling an IEPS indicator is specified. 3) Clause 3.1.7 Set-up Add the following entry to Table 3-8: Table 3-8/Q.2931 SETUP message content Information element Reference Direction Type Length IEPS indicator 4.5 Both O 4-5 4) Clause 3.2.7 Set-up Add the following entry to Table 3-19:
24、Table 3-19/Q.2931 SETUP message content Information element Reference Direction Type Length IEPS indicator 4.5 Both O 4-5 5) Clause 4.5.1 Coding rules Add the following entry to Table 4-3: Table 4-3/Q.2931 General information element format Information element identifiers Bits 8 7 6 5 4 3 2 1 1 0 0
25、1 1 0 0 0 IEPS indicator 2 ITU-T Rec. Q.2931 (1995)/Amd.5 (01/2006) 6) New clause 4.5.26 IEPS indicator Add the following new clause: 4.5.26 IEPS indicator The purpose of the IEPS indicator information element is to identify an IEPS call/connection for preferential call/connection set-up. It is opti
26、onally present in the SETUP message. The IEPS indicator information element is coded as shown in Figure 4-36. The length of this information element is 5 octets. 8 7 6 5 4 3 2 1 Octet IEPS indicator information element identifier 1 1 0 0 1 1 0 0 0 ext. 1 Coding standard IE instruction field Flag ind
27、icator Res IE action 2 Length of IEPS indicator contents 3 4 ext. 1 IEPS indicator 5 Figure 4-36/Q.2931 IEPS indicator information element Table 4-24/Q.2931 IEPS indicator information element IEPS indicator (octet 5) Bits 7 6 5 4 3 2 1 0 0 0 0 0 0 0 No indication 0 0 0 0 0 0 1 IEPS marking for prefe
28、rential call/connection set-up Other values are spare. 7) New clause 5.10 International Emergency Preference Scheme Add the following new clause: 5.10 International Emergency Preference Scheme 5.10.1 Call/connection establishment at the originating interface 5.10.1.1 Call/connection request When sub
29、scribed to, the DSS2 user entity will include the IEPS indicator IE in the SETUP message to provide preferential treatment for a call/connection. The call/connection is established with the IEPS indicator IE set as “IEPS marking for preferential call/connection set-up“ in the SETUP message. Restrict
30、ive network management controls (e.g., DSS2 signalling congestion control procedure) are not applied to this call/connection. 5.10.1.2 Call/connection rejection Procedures as specified in 5.1.8 apply. ITU-T Rec. Q.2931 (1995)/Amd.5 (01/2006) 3 5.10.2 Call/connection establishment at the destination
31、interface 5.10.2.1 Incoming call/connection request The network will map the IEPS call/connection marking transported through the network into the IEPS indicator information element and deliver it in the SETUP message to the DSS2 user entity. Restrictive network management controls (e.g., DSS2 signa
32、lling congestion control procedure) are not applied to this call/connection. 8) Clause J.2 Abbreviations Insert the following new abbreviation alphabetically: IEPS International Emergency Preference Scheme 9) Clause J.3 References Insert the following new references: 59 ITU-T Recommendation E.106 (2
33、003), International Emergency Preference Scheme (IEPS) for disaster relief operations. 60 ITU-T Recommendation E.412 (2003), Network management controls. 61 ITU-T Recommendation Q.1902.x series (2001), Bearer Independent Call Control protocol Capability Set 2 (BICC CS2). 62 ITU-T Recommendation Q.19
34、50 (2002), Bearer independent call bearer control protocol. 10) Appendix I Guidelines for the use of Instruction indicators Add the following entry to Table I.2: Table I.2/Q.2931 Typical use of Instruction indicators for the Q.2931 information elements which are related to the basic call control Inf
35、ormation elements Flag Origin Action indicator IEPS indicator Not used N&U Not significant Printed in Switzerland Geneva, 2006 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D General tariff principles Series E Overall network operation, telephone service, service
36、operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound p
37、rogramme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound progr
38、amme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality, telephone installations, local line networks Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Ter
39、minals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems
