1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.1241 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2001) SERIES Q: SWITCHING AND SIGNALLING Intelligent Network Introduction to Intelligent Network Capability Set 4 ITU-T Recommendation Q.1241 (Formerly CCITT Recommendation) ITU-T Q-SERIES RECOMME
2、NDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC 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 SY
3、STEMS No. 4 AND No. 5 Q.120Q.249 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 Q.250Q.309 SPECIFICATIONS 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.
4、 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 FOR IMT-2000 Q.1700Q.1799 BROADBAND ISDN
5、Q.2000Q.2999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Q.1241 (07/2001) i ITU-T Recommendation Q.1241 Introduction to Intelligent Network Capability Set 4 Summary This Recommendation is the first of the ITU-T Q.124x series of Recommendations devoted to IN CS-4, wh
6、ich builds on the architectural principles of IN as described in the preceding IN CS-1 (ITU-T Q.121x), IN CS-2 (ITU-T Q.122x) and the IN CS-3 (ITU-T Q.123x) series of Recommendations. Intelligent Network Capability Set 4 (IN CS-4) is the fourth standardized stage of the Intelligent Network (IN) as a
7、n architectural concept for the creation and provision of services, including telecommunication services, service creation and management. This Recommendation gives an introduction to IN CS-4 and describes the main characteristics and overall capabilities of IN CS-4. It includes the CS-4 functional
8、architecture relationships plus service and network aspects that form the basis of the IN CS-4 capabilities. CS-4 Service Features are listed and possible inter-networking scenarios between IN and non-IN structured networks are also described. The IN CS-4 Recommendations form a detailed and stable b
9、asis for implementing IN CS-4 telecommunication services. They also provide high level guidelines for supporting: service management; service creation, and some partially supported telecommunication services. The IN CS-4 Recommendations are intended to give the same degree of technical information a
10、s the IN CS-3 Recommendations. Source ITU-T Recommendation Q.1241 was prepared by ITU-T Study Group 11 (2001-2004) and approved under the WTSA Resolution 1 procedure on 13 July 2001. ii ITU-T Q.1241 (07/2001) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized
11、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 technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldw
12、ide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study 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 WTS
13、A 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 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administ
14、ration and a recognized operating agency. 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 Right. ITU takes no position concerning the evidence, validity or applicabil
15、ity 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 intellectual property, protected by patents, which may be required to implement
16、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 2002 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electr
17、onic or mechanical, including photocopying and microfilm, without permission in writing from ITU. ITU-T Q.1241 (07/2001) iii CONTENTS Page 1 Introduction. 1 2 Phased Standardization. 1 3 References. 1 4 General Description and Scope of IN CS-4 2 4.1 Criteria for IN CS-4 2 4.2 Basic features 2 4.3 IN
18、 Support for Voice over IP 2 4.3.1 Basic Services 2 4.3.2 Supplementary Services 3 4.3.3 Operator Specific Services 3 4.4 IN and IP networks 3 4.5 General aspects . 4 5 Overview of IN CS-4 Recommendations . 4 6 Service Features and Network Capabilities 5 6.1 Definitions 5 6.2 Service Features IN CS-
19、4 . 5 6.3 Network Capabilities IN CS-4 8 7 Distributed functional model for IN CS-4 9 7.1 Explanation of diagram. 9 7.2 IN functional model 10 7.3 Definition of functional entities related to IN service execution 10 7.3.1 CCA function (CCAF). 10 7.3.2 CC function (CCF) 11 7.3.3 SS function (SSF) 11
20、7.3.4 SC function (SCF) . 11 7.3.5 SD function (SDF). 12 7.3.6 SR function (SRF) . 12 7.3.7 IA function (IAF). 13 7.3.8 CUS function (CUSF). 13 7.3.9 SCUA function (SCUAF) 14 7.3.10 SM function (SMF) . 14 ITU-T Q.1241 (07/2001) 1ITU-T Recommendation Q.1241 Introduction to Intelligent Network Capabil
21、ity Set 4 1 Introduction This Recommendation contains an introduction to Intelligent Network Capability Set 4 (IN CS-4). It describes the main characteristics and overall capabilities of IN CS-4 and defines the service and network aspects with functional relationships that form the basis for IN CS-4
22、 capabilities. IN CS-4, as successor to IN CS-3, becomes the fourth standardized stage of the Intelligent Network (IN) for the creation and provision of network services. Along with advances in call modelling, security, feature interaction and mobility management, IN CS-4 offers enhanced Number Port
23、ability, Mobility, Broadband, Broadband and inter-working with the services in the Internet Protocol (IP) Networks. 2 Phased Standardization The phased approach of IN Capability Sets is described in ITU-T Q.1201. IN CS-4 extends the service aspects, network aspects and management aspects of IN CS-3
24、as specified in the ITU-T Q.123x series of Recommendations. Definition of IN CS-3 service features may be found in ITU-T Q.1231. 3 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendatio
25、n. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references lis
26、ted below. A list of the currently valid ITU-T Recommendations is regularly published. 1 ITU-T Q.1210 (1995), Q.1210-series intelligent network Recommendation structure. 2 ITU-T Q.1211 (1993), Introduction to intelligent network capability set 1. 3 ITU-T Q.1213 (1995), Global functional plane for in
27、telligent network CS-1. 4 ITU-T Q.1214 (1995), Distributed functional plane for intelligent network CS-1. 5 ITU-T Q.1215 (1995), Physical plane for intelligent network CS-1. 6 ITU-T Q.1218 (1995), Interface Recommendation for intelligent network CS-1. 7 ITU-T Q.1220 (1997), Q.1220-series Intelligent
28、 Network Capability Set 2 Recommendation structure. 8 ITU-T Q.1221 (1997), Introduction to Intelligent Network Capability Set 2. 9 ITU-T Q.1222 (1997), Service plane for Intelligent Network Capability Set 2. 10 ITU-T Q.1223 (1997), Global functional plane for Intelligent Network Capability Set 2. 11
29、 ITU-T Q.1224 (1997), Distributed functional plane for Intelligent Network Capability Set 2. 12 ITU-T Q.1225 (1997), Physical plane for Intelligent Network Capability Set 2. 13 ITU-T Q.1228 (1997), Interface Recommendation for Intelligent Network Capability Set 2. ITU-T Q.1241 (07/2001) 214 ITU-T Q.
30、1231 (1999), Introduction to Intelligent Network Capability Set 3. 15 ITU-T Q.1236 (1999), Intelligent Network Capability Set 3 Management Information Model Requirements and Methodology. 16 ITU-T Q.1237 (2000), Extensions to Intelligent Network Capability Set 3 in support of B-ISDN. 17 ITU-T Q.1238.
31、x (2000), Interface Recommendation for Intelligent Network Capability Set 3. 18 ITU-T Q.1290 (1998), Glossary of terms used in the definition of Intelligent Networks. 4 General Description and Scope of IN CS-4 4.1 Criteria for IN CS-4 IN CS-4 defines a set of IN capabilities that meet the following
32、general criteria: IN CS-4 is a subset of the target Intelligent Networks architecture. IN CS-4 is a superset of IN CS-3, as defined in the IN CS-3 Recommendations (1999). IN CS-4 is a set of definitions of capabilities that is help to both manufacturers and network service providers/operators. IN CS
33、-4 provides network capabilities defined to support the set of IN CS-4 benchmark services and service features. These capabilities can also be used to support other services that may, or may not, be standardized by ITU-T. The following clauses outline the work items defined for IN CS-4. 4.2 Basic fe
34、atures 1) Evolution of IN CS-3 Enhancement of the existing CS-3 features 2) Multiple point of control More than one-service logics in one or more SCFs are allowed to act on the same (half) call, which implies retriggering in the same SSP. The involved service logics act independently from each other
35、 (same behaviour as if the service logics are triggered in different SSPs), i.e. each service logic has its own abstract view of its half call segment. The interaction between the CCF and the several sub-SSFs is handled by an enhanced functional entity located between the CCF and the sub SSFs (Featu
36、re Interaction Manager). 4.3 IN Support for Voice over IP 4.3.1 Basic Services INAP CS-4 to support Voice over IP customers, including some new INAP CS-4 network capabilities, such as “high quality audio“ should support the following network voice services. Services that should be supported (as H.32
37、3 and SIP will support these services in the future) that may require INAP control are: Speech; Low bit rate data; Medium bit rate data; High bit rate data; High quality audio; Low bandwidth video; High bandwidth video. ITU-T Q.1241 (07/2001) 3In addition, end-to-end negotiation of parameters at the
38、 call set-up time and the ability to modify these parameters during the active phase of the call should be supported. 4.3.2 Supplementary Services Example supplementary services that require INAP CS-4 control in a network: Operator determined barring; User defined barring; Call screening; Call defle
39、ction; Call forwarding unconditional; Call forwarding on busy, no reply and not reachable; Call waiting; Call hold; Call transfer; Multiple Subscriber Profile; Multi-party; Closed user group; Advise of charge; Calling name identification presentation. Example supplementary services that require IN i
40、nteraction in a network: Calling number identification presentation/restriction; Connected line identification presentation/restriction; Call Completion Services (e.g. CCBS). 4.3.3 Operator Specific Services Example operator specific services that require INAP CS-4 control in a network: Short number
41、 dialling; Prepaid; VPN; Free-phone service; Number portability. 4.4 IN and IP networks Many aspects of inter-working between IP network services/applications and Intelligent Network services/features are addressed in IN CS-4: 1) IN support for IP connectivity Minimal support for accessing IN from H
42、.323 Gatekeepers/SIP Proxy Server for implementing services that do not require explicit handling of the call configuration (i.e. no support for CPH in case of VoIP, but support of free-phone, prepaid, etc.). Full support for accessing IN from a SIP Proxy for implementing services that do not requir
43、e explicit handling of the call configuration (i.e. no support for CPH in case of VoIP, but support of free-phone, prepaid, etc.). Full support for inter-working IN with Call Servers, based on the H.248 architecture for all types of services. ITU-T Q.1241 (07/2001) 44.5 General aspects 1) Network te
44、chnology transparency The target IN is considered an overlay “service network“ common to all transport and signalling technologies. Where possible and appropriate, network (transport and signalling) technology transparency is a goal. 2) Security Independent of benchmark services and/or service featu
45、res, security aspects between users and the network, and between physical entities within the network, are taken into account where appropriate. 5 Overview of IN CS-4 Recommendations Table 1 contains an overview of the Recommendations that are specifically related to IN CS-4. It was decided not to u
46、pdate the Recommendation of the Service Plane, Global Functional Plane and Physical Plane for IN CS-4. Where appropriate, the existing CS-2/CS-3 Recommendations ITU-T Q.1222, Q.1223 Q.1224, Q.1225, Q.1231, Q.1236, Q.1237 and Q.1238 can be taken as a reference. Table 1/Q.1241 IN CS-4 Recommendations
47、ITU-T Rec. Title Q.1240 Intelligent Network Capability Set 4 Recommendation Structure Q.1241 Introduction to Intelligent Network Capability Set 4 Q.1244 Distributed Functional Plane for Capability Set 4. Q.1248 Intelligent Network Interface Specifications for Capability Set 4 Q.1231 Introduction to
48、Intelligent Network Capability Set 3 Q.1236 Intelligent Network Management requirements for Capability Set 3 Q.1237 Extensions to Intelligent Network Capability Set 3 in support of B-ISDN Q.1238 Intelligent Network Interface Specifications for Capability Set 3 Q.1222 Service Plane for Intelligent Ne
49、twork Capability Set 2 Q.1223 Global Functional Plane for Intelligent Network Capability Set 2 Q.1224 Intelligent Network Distributed functional plane for Capability Set 2 Q.1225 Physical Plane for Intelligent Network Capability Set 2 Q.1290 Glossary of Terms Used in the Definition of Intelligent Networks ITU-T Q.1241 (07/2001) 56 Service Features and Network Capabilities This clause contains lists of the IN CS-4 service features and network capabiliti
