1、 International Telecommunication Union ITU-T Q.3307.1TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (06/2009) SERIES Q: SWITCHING AND SIGNALLING Signalling requirements and protocols for the NGN Resource control protocols Resource control protocol No. 7 Protocol at the interface between inter-domai
2、n policy decision physical entities (Ri interface) Recommendation ITU-T Q.3307.1 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 FOR SERVICES IN TH
3、E 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 Q.800Q.849 DIGIT
4、AL 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 BEARER INDEPENDENT
5、 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 signalling Q.3130
6、Q.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 applications Q.3700Q
7、.3849 Testing for NGN networks Q.3900Q.3999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Q.3307.1 (06/2009) i Recommendation ITU-T Q.3307.1 Resource control protocol No. 7 Protocol at the interface between inter-domain policy decision physical entities (Ri inter
8、face) Summary Recommendation ITU-T Q.3307.1 provides stage 3 specification of the Ri interface between policy decision physical entities (PD-PE) in different domains using the Diameter protocol. The functional requirements and the stage 2 specification for the Ri interface are defined in Recommendat
9、ion ITU-T Y.2111. This Recommendation as well as Recommendation ITU-T Y.2111 supports nomadism. Source Recommendation ITU-T Q.3307.1 was approved on 29 June 2009 by ITU-T Study Group 11 (2009-2012) under Recommendation ITU-T A.8 procedures. Keywords Diameter, resource control, Ri application. ii Rec
10、. ITU-T Q.3307.1 (06/2009) FOREWORD The International Telecommunication Union (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. 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, 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 right
18、s reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Q.3307.1 (06/2009) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 3 4 Abbr
19、eviations and acronyms 3 5 Conventions 4 6 Ri interface 4 6.1 Overview 4 6.2 Functional elements and capabilities 5 7 Procedures 5 7.1 Procedures for a per-session reservation 5 7.2 Initial reservation for a session . 6 7.3 Session modification 9 7.4 Session termination 10 7.5 PD-PE notifications 10
20、 8 Protocol specification . 11 9 Use of the Diameter base protocol 11 9.1 Securing Diameter messages 11 9.2 Accounting functionality 11 9.3 Use of sessions . 11 9.4 Transport protocol 12 9.5 Routing considerations . 12 9.6 Advertising application support . 12 10 Message specification . 12 10.1 Use o
21、f namespaces . 12 10.2 Commands 13 10.3 AVPs that are not supported over the Ri interface . 13 10.4 Descriptions of specific AVPs 13 11 Security considerations . 20 Appendix I Basic signalling procedures for Ri interface 22 I.1 Resource reservation procedure . 22 I.2 Resource release procedure 22 Re
22、c. ITU-T Q.3307.1 (06/2009) 1 Recommendation ITU-T Q.3307.1 Resource control protocol No. 7 Protocol at the interface between inter-domain policy decision physical entities (Ri interface) 1 Scope The protocol specified in this Recommendation is used to support inter-domain PD-PE communication when t
23、he service control entity (SCE) is not capable of interacting with the PD-PE in each domain crossed by the media flow. The Ri interface is used to control session-based policy. Using the protocol specified in this Recommendation, the original PD-PE can: provide information to the peer PD-PE to ident
24、ify media flows and their required QoS resource characteristics (e.g., QoS class, bandwidth, priority); provide service priority information to the peer PD-PE to facilitate appropriate priority handling; request resource usage information through the peer PD-PE for charging; indicate if the media is
25、 recommended to be enabled (i.e., gate opened) when resources are reserved; indicate if the media is recommended not to be enabled as soon as the resources are reserved, i.e., the original PD-PE can optionally request that the media gate be opened later; if a network address and port translation (NA
26、PT) function is required, request address mapping information so it can do any modifications that may be required for application signalling (e.g., SDP); and if a path-coupled resource reservation mechanism is used, indicate to the peer PD-PE whether it wishes to be notified when reservations are ob
27、tained and released. When an authorization token mechanism is used, the peer PD-PE may supply the original PD-PE with one or more authorization tokens which the SCE is required to include in the application signalling messages to the customer premises equipment (CPE). This Recommendation only discus
28、ses per session reservation. The functional requirements and the stage 2 specification for this interface are defined in ITU-T Y.2111. As indicated in ITU-T Y.2111, this Recommendation only supports nomadism; other use cases are for further study. 2 References The following ITU-T Recommendations and
29、 other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. 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 encour
30、aged to investigate the possibility of applying the most recent edition of the Recommendations and other references 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 docu
31、ment, the status of a Recommendation. ITU-T Q.3301.1 Recommendation ITU-T Q.3301.1 (2007), Resource control protocol No. 1 Protocol at the Rs interface between service control entities and the policy decision physical entity. 2 Rec. ITU-T Q.3307.1 (06/2009) ITU-T Q.3303.1 Recommendation ITU-T Q.3303
32、.1 (2007), Resource control protocol No. 3 Protocol at the interface between a Policy Decision Physical Entity (PD-PE) and Policy Enforcement Physical Entity (PE-PE): COPS alternative. ITU-T Y.110 Recommendation ITU-T Y.110 (1998), Global Information Infrastructure principles and framework architect
33、ure. ITU-T Y.2111 Recommendation ITU-T Y.2111 (2008), Resource and admission control functions in next generation networks. ETSI TS 129 209 ETSI TS 129 209 V6.7.0 (2007), Universal Mobile Telecommunications System (UMTS); Policy control over Gq interface (3GPP TS 29.209 version 6.7.0 Release 6). ETS
34、I TS 129 329 ETSI TS 129 329 V8.3.0 (2009), Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Sh interface based on the Diameter protocol. ETSI TS 133 210 ETSI TS 133 210 V8.2.0 (2009), Digital cellular telecommunications system (Phase 2+)
35、; Universal Mobile Telecommunications System (UMTS); 3G security; Network Domain Security (NDS); IP network layer security (3GPP TS 33.210 version 8.2.0 Release 8). ETSI TS 183 017 ETSI TS 183 017 V2.3.1 (2008), Telecommunications and Internet converged Services and Protocols for Advanced Networking
36、 (TISPAN); Resource and Admission Control: DIAMETER protocol for session- based policy set-up information exchange between the Application Function (AF) and the Service Policy Decision Function (SPDF); Protocol Specification. ETSI ES 283 026 ETSI ES 283 026 V2.4.1 (2008), Telecommunications and Inte
37、rnet converged Services and Protocols for Advanced Networking (TISPAN);Resource and Admission Control; Protocol 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 sp
38、ecification. ETSI ES 283 034 ETSI ES 283 034 V2.2.0 (2008), Telecommunications and Internet converged Services 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 Transmi
39、ssion Protocol. IETF RFC 3309 IETF RFC 3309 (2002), Stream Control Transmission Protocol (SCTP) Checksum Change. IETF RFC 3588 IETF RFC 3588 (2003), Diameter Base Protocol. IETF RFC 4005 IETF RFC 4005 (2005), Diameter Network Access Server Application. 3 Definitions 3.1 Terms defined elsewhere This
40、Recommendation uses the following terms defined elsewhere: 3.1.1 gate ITU-T Y.2111: A construct used to enable or disable the forwarding of IP packets based on the policy decision. A gate is identified by the classifier (e.g., IPv4 5-tuple) and direction of a media flow or a group of media flows tha
41、t are in conformance to the same set of policy decisions. Rec. ITU-T Q.3307.1 (06/2009) 3 3.1.2 policy decision physical entity (PD-PE) ITU-T Q.3303.1: The PD-PE is an implemented instance of the policy decision functional entity (PD-FE) as defined in ITU-T Y.2111. 3.2 Terms defined in this Recommen
42、dation This Recommendation defines the following terms: 3.2.1 attribute-value pair (AVP): An attribute-value pair corresponds to an information element in a Diameter message (see IETF RFC 3588). 3.2.2 domain: A collection of physical or functional entities which are owned and operated by a player an
43、d can include entities from more than one role. The extent of a domain is defined by a useful context and one player can have more than one domain. 3.2.3 originating policy decision physical entity (PD-PE): A PD-PE in an originating domain which triggers QoS resource requests to a peer PD-PE. NOTE “
44、The originating PD-PE“ is an implemented instance of the “original PD-FE“ described in ITU-T Y.2111. 3.2.4 peer policy decision physical entity (PD-PE): A PD-PE in the interconnected domain which receives QoS resource requests from an originating PD-PE. 3.2.5 stateful operation: An operation in whic
45、h a peer PD-PE stores a Session-Id value received in an AA-Request message. 3.2.6 stateless operation: An operation in which a peer PD-PE does not store a Session-Id received in an AA-Request message. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AAA
46、 AA-Answer AAR AA-Request AVP Attribute-Value Pair CEA Capability Exchange Answer CER Capability Exchange Request CGPE-PE Customer premises network Gateway Policy Enforcement Physical Entity CPE Customer Premises Equipment CPN Customer Premises Network GPRS General Packet Radio Service IP-CAN Intern
47、et Protocol Connectivity Access Network IPSec Internet Protocol Security NACE Network Attachment Control Entity NACF Network Attachment Control Function NAPT Network Address and Port Translation NAT Network Address Translation PD-PE Policy Decision Physical Entity PE-PE Policy Enforcement Physical E
48、ntity QoS Quality of Service 4 Rec. ITU-T Q.3307.1 (06/2009) RACF Resource and Admission Control Functions RAC-PE Resource and Admission Control Physical Entity RAR Re-Auth-Request SCE Service Control Entity SDI Session Description Information SDP Session Description Protocol SIP Session Initiation
49、Protocol SLA Service Level Agreement TRC-PE Transport Resource Control Physical Entity TRE-PE Transport Resource Enforcement Physical Entity UE User Equipment 5 Conventions There are no specific conventions within this Recommendation. 6 Ri interface 6.1 Overview The RI reference point interface is defined in ITU-T Y.2111 and is used for service-based policy set-up information between the originating and peer PD-PEs for inter-domain communication. Through the Ri, an ori
