ITU-T SERIES Q SUPP 5-1999 Number Portability - Capability Set 2 Requirements for Service Provider Portability (Query on Release and Dropback) - Series Q Switching and Signalling (.pdf

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1、 STD-ITU-T RECMN SERIES Q SUPP 5-ENGL 2999 m 48h2591 Ohb4147 327 m i NT ER NAT I ON AL TE LEC0 M M U N I CAT I ON U N I ON ITU-T TELECOMMUNICATION STAN DAR DIZATION SECTOR OF ITU Series Q Supplement 5 (03/99) SERIES Q: SWITCHING AND SIGNALLING Number portability - Capability set 2 requirements for s

2、ervice provider portability (Query on release and Dropback) ITU-T Q-series Recommendations - Supplement 5 (Previously CCITT Recommendations) I STD-ITU-T RECMN SERIES Q SUPP 5-ENGL 1999 4862591 Obb414 263 m ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL

3、 SERVICE INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EX

4、CHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q. 14.3 Q.4-(2.59 Q.60

5、-Q.99 Q.100-Q.119 (2.1 204.249 Q.250-(2.309 Q.310-Q.399 Q.400-Q.499 Q.500-(2.599 Q.6004.699 Q.7004.849 Q.850-Q.999 Q.1000-Q.1 O99 Q.1100-(2.1199 Q.1200-Q.1999 Q.2000-Q.2999 For further details, please refer to ITU-T List of Recommendations. STD=ITU-T RECMN SERIES Q SUPP 5-ENGL 1999 48b259L Obb4149 L

6、TT D SUPPLEMENT 5 TO ITU-T Q-SERIES RECOMMENDATIONS NUMBER PORTABILITY - CAPABILITY SET 2 REQUIREMENTS FOR SERVICE PROVIDER PORTABILITY (QUERY ON RELEASE AND DROPBACK) Summary This Supplement describes the requirements to support Service Provider Portability in a Signalling System No. 7 network for

7、Number Portability Capability Set 2 (NPCS-2) with the methods “Query on Release“ and “Dropback“. Source Supplement 5 to ITU-T Q-series Recommendations was prepared by ITU-T Study Group 11 (1997-2000) and was approved under the WTSC Resolution No. 5 procedure on the 15th of March 1999. Q series - Sup

8、plement 5 (03199) i - - STD=ITU-T RECMN SERIES Q SUPP 5-ENGL 1779 D 4862573 Ob64150 733 D FOREWORD ITU (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

9、 the ITU. The ITU-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 Conference (WTSC), which meets every four years, establishes

10、 the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-Ts

11、purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation the term recognized operating agency (ROA) includes any individual, company, corporation or governmental organization that operates a public correspondence service. The terms Administ

12、ration, ROA and public correspondence are defined in the Constitution of the ITU (Geneva, 1992). INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU ta

13、kes 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, the ITU had not received notice of intellectual

14、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. O ITU 1999 All rights reserved. No part of this publicat

15、ion may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. ii Q series - Supplement 5 (03/99) CONTENTS 1 2 3 4 5 5.1 5.2 6 6.1 7 7.1 7.2 7.3 7.4 7.5 Scope . Normative references Terms and

16、definitions . Abbreviations General Purpose Application Description of PNCC-SPP Overview of Number Portability SS7 capabilities Inter-exchange Portable Number Call Control (PNCC-SPP) 6.1.2 Configuration models 6.1.1 Query on Release (QoR) . Network architectures for Service Provider Portability of g

17、eographic numbers 7.1.1 Call rerouting initiated by “Query on Release (QoR)“ principies from Donor network . 7.1.2 Query on Release combined with query by Recipient network (two-step number translation principle) Functional Entity model and Information Flow model 7.2.1 Functional Entity model 7.2.2

18、Information Flow Model . 7.2.3 Allocation of functions to equipment Generic Information Flows . 7.3.1 Call rerouting initiated by “Query on Release (QoR)“ principles from Donor network . 7.3.2 Query on Release combined with query by Recipient network S DL . Procedures for QoR method . 7.5.2 Exceptio

19、nal procedures 7.5.3 Interworking considerations 7.5.1 Normal procedures 7.5.4 Interactions 7.5.5 Procedures based on bilateral agreements . 7.5.6 NP routing loop detection issues . Q series . Supplement 5 (03/99) Page 1 2 2 2 2 3 4 4 4. 4 5 6 6 7 8 9 9 10 11 12 12 13 14 16 16 16 17 17 18 19 . 111 -

20、 . _- STD*ITU-T RECMN SERIES Q SUPP 5-ENGL 1999 48b259L Obb4L52 794 8 Dropback . 8.1 Network architectures for Service Provider Portability of geographic numbers 8.1.1 Call rerouted by Dropback principles from Donor network 8.1.2 Dropback combined with query by Recipient network (two-step number tra

21、nslation principle) Functional Entity model and Information Flow model 8.2.1 Functional Entity model 8.2.2 Information Flow model 8.2.3 Allocation of functions to equipment 8.3 Generic Information Flows . Call rerouted by Dropback principles from Donor network Dropback combined with query by Recipie

22、nt network . 8.4 SDL . 8.5 Procedures for Dropback method . 8.5.1 Normal procedures 8.5.2 Exceptional procedures 8.5.3 Interworking considerations 8.5.4 Interactions 8.5.5 Procedures based on bilateral agreements . 8.5.6 8.2 8.3.1 8.3.2 NP routing loop detection issues . 9 Signalling requirements An

23、nex A . Intelligent Network Support for PNCC for Service Provider Portability using QoR . A.l Scope . A.2 General description . A.2.1 General assumptions A.2.2 Number portability data . A.2.3 IN support for Service Provider Portability of geographic numbers . A.2.4 Information Flows for PNCC-SSP usi

24、ng the IN architecture Annex B . Intelligent Network support for PNCC for Service Provider Portability using Dropback . B.l Scope . B.2 General description . B.2. i General assumptions B . 2.2 Number Portability data . B.2.3 IN support for Service Provider Portability of geographic numbers . B.2.4 I

25、nformation Flows for PNCC-SSP using the IN architecture Page 19 19 19 21 21 21 23 24 24 24 26 27 28 28 28 29 29 30 30 31 33 33 34 34 34 34 35 37 37 38 38 38 39 39 iv Q series . Supplement 5 (03/99) STD-ITU-T RECMN SERIES Q SUPP 5-ENGL L999 m 4862591 0664l153 620 m Supplement 5 to Q-series Recommenda

26、tions NUMBER PORTABILITY - CAPABILITY SET 2 REQUIREMENTS FOR SERVICE PROVIDER PORTABILITY (QUERY ON RELEASE AND DROPBACK) (Geneva, 1999) 1 Scope This Supplement describes the additions required to support Service Provider Portability in a Signalling System No. 7 network for Number Portability Capabi

27、lity Set 2 (NPCS-2). The definition for Service Provider Portability is given in this Supplement. The Portability Number Call Control for Service Provider Portability (PNCC-SPP) in a Signalling System No. 7 network provides the core function to support portability for geographic numbers using the “Q

28、uery on Release“ and the “Dropback“ methods. Both methods are considered as network options. In addition, this Supplement describes Number Portability in terms of high-level network architectures and generic routing methods for NP Capability Set 2. These architectures and routing methods are not to

29、be considered exhaustive; they just illustrate some of the options. Other alternatives do exist and may be covered by Capability Set 1 i or by future capability sets. To support the routing methods identified, enhancements to signalling protocols are required (initially, not all the architectures an

30、d routing methods will be supported by the signalling protocols). These signalling enhancements will be phased in NP capability sets. This Supplement describes: a b) c) d) For additional information concerning terminology, objectives for the study of Number Portability, classification and generic as

31、sumptions for Number Portability, refer to i - Number Portability Capability Set 1 Architecture. These principles apply to both Number Portability Capability Sets 1 and 2. Additional NP architectures for routing of ordinary calls (circuit-related signalling) are included in this Supplement. NP archi

32、tectures for routing of non-circuit-related supplementary services (e.g. CCBS) are included in i. Only Service Provider Portability (SPP) of geographic numbers is considered in detail; however, some text is included on SPP of non-geographic numbers, although this type of NP is still under study. The

33、 signalling requirements for the support of NPCS-2 PNCC-SPP are contained in a cumulative list in this Supplement which supersedes previous lists. Annexes A and B contain the additional requirements for the support of PNCC-SPP when Intelligent Network (IN) is involved. a set of network architectures

34、 to support Number Portability; the exchange of NP-related information between networks per architecture; routing issues with relation to NP and the described architecture; generic Information Flows for the described architectures. Q series - Supplement 5 (03/99) 2 Normative references i Supplement

35、3 to Q-series Recommendations (1998), Number Portability - Scope and capabiliy Set I architecture. The normative references for supplementary services are covered in the Q.73 and Q.76 series of Recommendations. 3 Terms and definitions For a complete set of definitions, see reference i. Any additiona

36、l definitions or modifications to existing definitions specific to this Supplement are provided in this clause. 3.1 rerouting network: A network, in the call path, that responds to a release or Dropback message in order to reroute a ported call to the Recipient network. 3.2 rerouting exchange: An ex

37、change in the rerouting network call path, that responds to a release or Dropback message in order to route a ported call to the Recipient network. 4 Abbreviations For a complete set of abbreviations, see reference i. Any additional abbreviations specific to this Supplement are provided below: cc Co

38、untry Code FE Functional Entity IS DN NPA Numbering Plan Administration PBX Private Branch Exchange PNCC-SPP RN Routing Number ROA Recognized Operating Agency SDL Specification and Description Language TC Transaction Capabilities Integrated Services Digital Network Portable Number Call Control - Ser

39、vice Provider Portability 5 General The PNCC-SPP network capability delivers the following information to each exchange in the call path, once routing information has been obtained: 1) the original dialled number; 2) the necessary routing information; 3) In addition, for calls originating from a por

40、ted number, PNCC-SPP delivers the portable number as the calling party number and location-related information about the calling party. The capabilities of the PNCC-SPP build upon the existing SS7 capabilities. Backward compatibility is an important requirement. Only the new capabilities, not covere

41、d by existing ITU-T Recommendations, required for PNCC-SPP are described here. an indication that NP routing information has been obtained. 2 Q series - Supplement 5 (03/99) - STD-ITU-T RECMN SERIES Q SUPP 5-ENGL 1999 M 4862571 Dbb4155 YT3 m Between country code domain Number Portability affects any

42、 service that makes an assumption that an E.164 directory number indicates the correct network address. NP supports the use of numbers that do not directly provide an indication of the network address. NP is used with numbers that have traditionally contained network location information (e.g. numbe

43、ring plan). To route a call dialled with a non-geographic number (e.g. SOO), the dialled number is often translated to a geographic number. How to obtain such a translation is beyond the scope of this Supplement. If the resulting translated geographic number is portable, the PNCC-SPP network capabil

44、ities apply. Deployment of NP may require other network capabilities and network interfaces related to: a) database architecture; b) exchange internal cai1 processing; c network operations and administration. These network capabilities and interfaces are outside the scope of PNCC-SPP. The functions

45、described in this Supplement support Number Portability within the national domain and therefore should not be invoked for outgoing international calls. Within Between Within domain domain domain country code country code country code 5.1 Purpose Number Portability (NP) allows end users of public sw

46、itched networks to retain their E.164 telephone numbers when they change their service provider (service provider portability), location within a specific geographical area (location portability), or network service (service portability). Table 1 shows the supported combinations between E.164 number

47、s and the types of Number Portability . 3) Country Code for networks Table 1 - Scope of the Number Portability service na O I I Location Portability I E.164 I) Country Code for 2) Country Code for global services Between country code domain na na Within country code domain a a Service Provider Porta

48、bility Service Portability Q series - Supplement 5 (03/99) 3 STDmITU-T RECMN SERIES Q SUPP 5-ENGL 1999 LiBh259L Oh64156 33T The number beginning with “Country Code for geographic area“ 1) in the table is the The number beginning with the “Country Code for global service“ 2) in the table is the The n

49、umber beginning with “Country Code for networks“ 3) in the table is the number that number that ITU assigns to each country (or countries in an integrated numbering plan). The number following the CC is administered by the Numbering Plan Administration (NPA). number that ITU assigns to the global service. ITU assigns to two or more international networks (typically ROAS). The following digits identify each international network. 5.2 Application PNCC-SPP is to support the implementation of Service Provider