ITU-T Q 3321 1-2010 Resource control protocol No 1 version 2 C Protocol at the Rs interface between service control entities and the policy decision physical entity (Study Group 11.pdf

1、 International Telecommunication Union ITU-T Q.3321.1TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (06/2010) SERIES Q: SWITCHING AND SIGNALLING Signalling requirements and protocols for the NGN Resource control protocols Resource control protocol No.1, version 2 Protocol at the Rs interface betwee

2、n service control entities and the policy decision physical entity Recommendation ITU-T Q.3321.1 ITU-T Q-SERIES RECOMMENDATIONS 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 FO

3、R 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.699 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE

4、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 SPECIFICATIONS OF SIGNALLING RELATED TO BE

5、ARER INDEPENDENT CALL CONTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR THE NGN Q.3000Q.3999 General Q.3000Q.3029 Network signalling and control functional architecture Q.3030Q.3099 Network data organization within the NGN Q.3100Q.3129 Bearer control s

6、ignalling Q.3130Q.3179 Signalling and control requirements and protocols to support attachment in NGN environments Q.3200Q.3249 Resource control protocols Q.3300Q.3369Service and session control protocols Q.3400Q.3499 Service and session control protocols supplementary services Q.3600Q.3649 NGN appl

7、ications Q.3700Q.3849 Testing for NGN networks Q.3900Q.3999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Q.3321.1 (06/2010) i Recommendation ITU-T Q.3321.1 Resource control protocol No. 1, version 2 Protocol at the Rs interface between service control entities a

8、nd the policy decision physical entity Summary Recommendation ITU-T Q.3321.1 specifies the rcp1 protocol, a protocol between service control entities (SCEs) in the services stratum and the policy decision physical entity (PD-PE) in the resource and admission control function block. This protocol can

9、 be used to request and commit transport resources, to retrieve address mapping information that can be used to modify application signalling, and to receive reports on transport resource usage for charging. It satisfies the requirements for information flows across the Rs reference point as specifi

10、ed in clause 8.1 of Recommendation ITU-T Y.2111. Recommendation ITU-T Q.3321.1 supersedes Recommendation ITU-T Q.3301.1 (03/2007). History Edition Recommendation Approval Study Group 1.0 ITU-T Q.3321.1 2010-06-13 11 ii Rec. ITU-T Q.3321.1 (06/2010) FOREWORD The International Telecommunication Union

11、(ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). 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

12、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 which, in turn, produce Recommendations on these

13、 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 and IEC. NOTE In this Recommendation, the expres

14、sion “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 certain mandatory provisions (to ensure e.g., interoperability or applicabili

15、ty) 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 requirements. The use of such words does not suggest that compliance with the Rec

16、ommendation 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 Right. ITU takes no position concerning the evidence, validity or applicability

17、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 this

18、 Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2010 All rights reserved. No part of this publication may be reproduced, by any means whats

19、oever, without the prior written permission of ITU. Rec. ITU-T Q.3321.1 (06/2010) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 3 4 Abbreviations and acronyms 3 5 Rs interface . 4 5.1 Overview 4 5.2 Rs reference model . 4 5.3 Functional elements and capabilities 5 6 SCE session-specific

20、procedures 5 6.1 Procedures at the PD-PE 5 6.2 Procedures at the SCE 8 6.3 IMS-related SCE procedures 10 7 Protocol specification . 11 8 Use of the Diameter base protocol 12 8.1 Securing Diameter messages 12 8.2 Accounting functionality 12 8.3 Use of sessions . 12 8.4 Transport protocol 12 8.5 Routi

21、ng considerations . 12 8.6 Advertising application support . 13 9 Message specification . 13 9.1 Commands 13 9.2 Experimental-Result-Code AVP values . 21 9.3 AVPs . 22 9.4 Use of namespaces . 37 10 Security considerations . 37 Annex A Support for SIP forking . 39 A.1 Support for SIP forking 39 Annex

22、 B QoS parameter mapping for SDP 40 B.1 SDP to service information mapping in SCE . 40 Annex C Derivation of flow numbers . 45 C.1 Purpose and scope 45 C.2 Conceptual framework . 45 C.3 Examples 46 Appendix I Mapping of Rs information components . 51 Appendix II ITU-T registry for ITU-T defined Diam

23、eter attribute-value pairs (AVPs) 54 Bibliography. 55 Rec. ITU-T Q.3321.1 (06/2010) 1 Recommendation ITU-T Q.3321.1 Resource control protocol No. 1, version 2 Protocol at the interface between service control entities and the policy decision physical entity 1 Scope This Recommendation provides the s

24、tage 3 specification of the protocol at the interface between service control entities (SCEs) and the policy decision physical entity (PD-PE). The functional requirements and the stage 2 specifications for this interface are contained in clause 8.1 of ITU-T Y.2111 and in b-ITU-T Q-Sup.51. This inter

25、face is used to control session-based policy. Using the protocol specified in this Recommendation, the SCE can: provide information to the PD-PE to identify media flows and their required QoS resource characteristics (e.g., QoS class, bandwidth, priority); provide service priority information to the

26、 PD-PE to facilitate appropriate priority handling; request resource usage information through the PD-PE for charging; provide related service information to the PD-PE to facilitate appropriate dynamic firewall working mode selection; indicate whether the media should be enabled (i.e., gate opened)

27、when resources are reserved; in those instances where the media should not be enabled as soon as the resources are reserved, i.e., may request that the gate be opened later; in the case where a NAPT function is required, request address mapping information so it can do any modifications that may be

28、required to address information within application signalling (e.g., SDP); and in the case where a path-coupled resource reservation mechanism is used, indicate to the PD-PE whether it wishes to be notified when reservations are obtained and released. When an authorization token mechanism is used, t

29、he PD-PE may supply the SCE with one or more authorization tokens which the SCE shall include in application signalling to the CPE. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommenda

30、tion. 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

31、listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T Y.2111 Recommendation ITU-T Y.2111 (2008), Resource and admission contro

32、l functions in next generation networks. ETSI TS 129 209 ETSI TS 129 209 V6.4.0 (2005), Universal Mobile Telecommunications System (UMTS); Policy control over Gq interface (3GPP TS 29.209 version 6.4.0 Release 6). ETSI TS 129 214 ETSI TS 129 214 V7.4.0 (2008), Universal Mobile Telecommunications Sys

33、tem (UMTS);Policy and charging control over Rx reference point (3GPP TS 29.214 version 7.4.0 Release 7). 2 Rec. ITU-T Q.3321.1 (06/2010) ETSI TS 129 329 ETSI TS 129 329 V6.7.0 (2006), Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Sh interfa

34、ce based on the Diameter protocol; Protocol details (3GPP TS 29.329 version 6.7.0 Release 6). ETSI TS 133 210 ETSI TS 133 210 V6.6.0 (2006), Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); 3G security; Network Domain Security (NDS); IP networ

35、k layer security (3GPP TS 33.210 version 6.6.0 Release 6). ETSI TS 183 017 ETSI TS 183 017 V1.1.1 (2006), Telecommunications and Internet Converged Services and Protocols for Advanced Networking (TISPAN); Resource and Admission Control: DIAMETER protocol for session-based policy set-up information e

36、xchange between the Application Function (AF) and the Service Policy Decision Function (SPDF); Protocol Specification. ETSI ES 283 026 ETSI ES 283 026 V1.1.1 (2006), Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Resource and Admission Control; Pro

37、tocol for QoS reservation information exchange between the Service Policy Decision Function (SPDF) and the Access-Resource and Admission Control Function (A-RACF) in the Resource and Protocol specification. ETSI ES 283 034 ETSI ES 283 034 V1.1.1 (2006), Telecommunications and Internet Converged Serv

38、ices and Protocols for Advanced Networking (TISPAN); Network Attachment Sub-System (NASS); e4 interface based on the DIAMETER protocol. IETF RFC 2960 IETF RFC 2960 (2000), Stream Control Transmission Protocol. IETF RFC 3261 IETF RFC 3261 (2002), SIP: Session Initiation Protocol. IETF RFC 3264 IETF R

39、FC 3264 (2002), An Offer/Answer Model with Session Description Protocol (SDP). IETF RFC 3309 IETF RFC 3309 (2002), Stream Control Transmission Protocol (SCTP) Checksum Change. IETF RFC 3388 IETF RFC 3388 (2002), Grouping of Media Lines in the Session Description Protocol (SDP). IETF RFC 3520 IETF RF

40、C 3520 (2003), Session Authorization Policy Element. IETF RFC 3524 IETF RFC 3524 (2003), Mapping of Media Streams to Resource Reservation Flows. IETF RFC 3550 IETF RFC 3550 (2003), RTP: A Transport Protocol for Real-Time Applications. IETF RFC 3556 IETF RFC 3556 (2003), Session Description Protocol

41、(SDP) Bandwidth Modifiers for RTP Control Protocol (RTCP) Bandwidth. IETF RFC 3588 IETF RFC 3588 (2003), Diameter Base Protocol. IETF RFC 4005 IETF RFC 4005 (2005), Diameter Network Access Server Application. IETF RFC 4566 IETF RFC 4566 (2006), SDP: Session Description Protocol. Rec. ITU-T Q.3321.1

42、(06/2010) 3 3 Definitions This Recommendation defines the following terms: 3.1 attribute-value pair (AVP): An attribute-value pair corresponds to an Information Element in a Diameter message. See IETF RFC 3588. 3.2 downlink: In the direction from the network toward a specified instance of user equip

43、ment. 3.3 hard-state reservation: A type of reservation whereby the requested resources are reserved without time-limit. NOTE In stateful operation, hard-state reservations are terminated when the DIAMETER session is terminated. In stateless operation, hard-state reservations are terminated by expli

44、cit request. 3.4 IP flow: An IP flow is a unidirectional flow of data packets between specified transport end points (ports), sharing a common description in terms of the service requirements specified by the SCE. NOTE An IP flow will often have a counterpart flow in the opposite direction. In this

45、Recommendation, the description of service requirements for an IP flow and its counterpart, if any, is mapped to a Media-Sub-Component AVP (see clause 9.3.28). 3.5 SCE session: A session established by a service/session control signalling protocol offered by the SCE that requires a session set-up wi

46、th explicit session description before the use of the service. NOTE One example of a SCE session is an IMS session. 3.6 SCE session signalling protocol: The signalling protocol used to control the SCE session. NOTE One example of an SCE session signalling protocol is SIP with SDP. 3.7 soft-state res

47、ervation: A type of reservation whereby the requested resources are reserved for a finite amount of time. In stateful operation, soft-state reservations are terminated if the DIAMETER session is terminated. 3.8 uplink: In the direction from a specified instance of user equipment toward the network.

48、4 Abbreviations and acronyms This Recommendation uses the following abbreviations: AAA AA-Answer AAR AA-Request ASA Abort-Session-Answer ASR Abort-Session-Request AVP Attribute-Value Pair CGPD-PE CPN Gateway Policy Decision Physical Entity CGPE-PE CPN Gateway Policy Enforcement Physical Entity CPN C

49、ustomer Premises Network FQDN Fully Qualified Domain Name GCID GPRS Charging ID GGSN Gateway GPRS Support Node GPRS General Packet Radio Service IANA Internet Assigned Numbers Authority 4 Rec. ITU-T Q.3321.1 (06/2010) IMS IP Multimedia Subsystem IP-CAN IP-Connectivity Access Network NAPT Network Address and Port Translation NASREQ Network Access Server Application P-CSCF Proxy-Call Session Control Function PD-PE Policy Decision Physical Entity PDP Po