1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.1902.1TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1(12/2002) SERIES Q: SWITCHING AND SIGNALLING Specifications of signalling related to Bearer Independent Call Control (BICC) Bearer Independent Call Control protocol (Capability Set 2): Fun
2、ctional description Amendment 1: Support for the International Emergency Preference Scheme ITU-T Recommendation Q.1902.1 (2001) Amendment 1 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING
3、 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 SYSTEM No. 4 Q.120Q.139 SPECIFICATIONS OF SIGNALLING SYSTEM No. 5 Q.140Q.199 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 Q.250Q.309 SPECIFICAT
4、IONS OF SIGNALLING SYSTEM R1 Q.310Q.399 SPECIFICATIONS OF SIGNALLING SYSTEM R2 Q.400Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.699 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 Q.850Q.999 PUBL
5、IC LAND MOBILE NETWORK Q.1000Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.20
6、00Q.2999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. Q.1902.1 (2001)/Amd.1 (12/2002) i ITU-T Recommendation Q.1902.1 Bearer Independent Call Control protocol (Capability Set 2): Functional description Amendment 1 Support for the International Emergency Preferen
7、ce Scheme Summary This amendment was produced to meet the urgent need for the implementation of the International Emergency Preference Scheme (IEPS) as specified in ITU-T Rec. E.106. This amendment contains the modifications to ITU-T Rec. Q.1902.1 (07/01) in order to accommodate these needs. This am
8、endment should be read in connection with the related amendments to ITU-T Recs Q.1902.2, Q.1902.3, Q.1902.4 and Q.1950. Source Amendment 1 to ITU-T Recommendation Q.1902.1 (2001) was prepared by ITU-T Study Group 11 (2001-2004) and approved under the WTSA Resolution 1 procedure on 29 December 2002.
9、ii ITU-T Rec. Q.1902.1 (2001)/Amd.1 (12/2002) 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. ITU-T is responsible for studying
10、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 study by the ITU-T study groups wh
11、ich, 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 collaborative basis with ISO an
12、d IEC. NOTE 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 Recommend
13、ation may 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 approva
14、l of this Recommendation, ITU 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 pat
15、ent database. ITU 2003 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. Q.1902.1 (2001)/Amd.1 (12/2002) iii CONTENTS Page 1) Clause 1 Scope. 1 2) Clause 2 References. 1 3) Clause 3 Definitions 1 4) Cl
16、ause 8 Capabilities supported. 1 5) New Appendix II 2 ITU-T Rec. Q.1902.1 (2001)/Amd.1 (12/2002) 1 ITU-T Recommendation Q.1902.1 Bearer Independent Call Control protocol (Capability Set 2): Functional description Amendment 1 Support for the International Emergency Preference Scheme 1) Clause 1 Scope
17、 Insert the following paragraph at the end of this clause: The International Emergency Preference Scheme is described in ITU-T Rec. E.106, Description of an International Emergency Preference Scheme 64. The associated BICC general functions of messages and parameters, formats and codes, and procedur
18、es are to be found in ITU-T Recs Q.1902.2 14, Q.1902.3 15, Q.1902.4 16 and Q.1950 61. 2) Clause 2 References Add the following new references: 64 ITU-T Recommendation E.106 (2000), Description of an international emergency preference scheme (IEPS). 65 ITU-T Recommendation Q.767 (1991), Application o
19、f the ISDN User Part of CCITT signalling system No. 7 for international ISDN interconnections. 3) Clause 3 Definitions Insert the following new terms alphabetically and renumber the subsequent terms accordingly: 3.13 ISUP92: 1993 publication of ISUP Recommendations. 3.14 ISUP97: 1997 publication of
20、ISUP Recommendations. 3.15 ISUP2000: 1999 publication of ISUP Recommendations. 4) Clause 8 Capabilities supported Insert the following new entry into Table 1/Q.1902.1: Table 1/Q.1902.1 Signalling capabilities for basic call Function/service National use International International Emergency Preferen
21、ce Scheme (Note 4) NOTE 4 The procedures specified here for the international signalling network can be applied in national networks also. It is essential that the call is set up in the originating and destination national networks with utmost priority. 2 ITU-T Rec. Q.1902.1 (2001)/Amd.1 (12/2002) 5
22、) New Appendix II Insert the following new Appendix II: Appendix II BICC enhancements to support IEPS II.1 Introduction There is an urgent need for enhancements to BICC implementations in support of the International Emergency Preference Scheme (IEPS) as specified in ITU-T Rec. E.106 64. The intent
23、is to increase the probability of call completion in congested network situations for authorized callers. These enhancements only apply to the international interface Administrations, and network operators are encouraged to support these, or similar capabilities, in their domestic networks. II.2 Sco
24、pe This appendix provides an overview of the signalling needed to support IEPS. The BICC enhancements to the other ITU-T Recommendations of this series relating to basic call are provided in corresponding amendments to ITU-T Recs Q.1902.2, Q.1902.3, and Q.1902.4. To provide a viable IEPS capability,
25、 it is required to implement all the amendments to the ITU-T Recommendations of this series. II.3 Approach The implementation of IEPS support may take place in a phased approach in a forward compatible manner. This phased approach facilitates and expedites the introduction of IEPS. The phases are: a
26、) The minimum implementation relies on the transfer in BICC of a specific IEPS call marking in the forward direction for preferential call set-up in the international network. In an international exchange, any call attempt with this IEPS call marking shall bypass restrictive call handling procedures
27、 (for example, network management controls as specified in ITU-T Rec. E.412 35). b) An improved implementation provides the generation of an early ACM. The aim of this mechanism is to reduce call set-up failures due to timer expiration caused by, for example, queuing delays for trunk allocation on c
28、ongested routes. c) An additional information transfer mechanism, based on a new parameter in conjunction with the IEPS call marking, may be introduced to facilitate future enhancements of IEPS, for example, in the areas of identification, security, validation, and priority levels. The coding of thi
29、s new parameter and its associated procedures is not covered in this set of amendments and is for further study. II.4 BICC versions and ISUP protocols As the BICC CS-2 specifications (14, 15, 16 and 61) are published in different ITU-T Recommendations, these amendments to BICC provide all necessary
30、information for support of IEPS in international exchanges. The support of IEPS by BICC CS-1 13 is covered by the amendments to the ISUP2000 series of Recommendations 6, 7, 8 and 9. ITU-Rec. Q.767 65 and the ISUP2000 series of Recommendations 6, 7, 8 and 9 are also being amended in support of IEPS.
31、IEPS can be implemented on the previous versions ISUP92 and ISUP97 by the identical amendments made for the ISUP2000 series of Recommendations. Printed in Switzerland Geneva, 2003 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series B Means of expression: definitions, sy
32、mbols, classification Series C General telecommunication statistics Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems
33、 and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of c
34、ables and other elements of outside plant Series M TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measur
35、ing 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 Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks and open system communications Series Y Global information infrastructure and Internet protocol aspects Series Z Languages and general software aspects for telecommunication systems
