1、 International Telecommunication Union ITU-T Q.3303.1TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (08/2012) SERIES Q: SWITCHING AND SIGNALLING Signalling requirements and protocols for the NGN Resource control protocols Resource control protocol No. 3 Protocol at the interface between a Policy De
2、cision Physical Entity (PD-PE) and a Policy Enforcement Physical Entity (PE-PE): COPS alternative version 2 Recommendation ITU-T Q.3303.1 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING Q
3、.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 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 SIGNALL
4、ING SYSTEM No. 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 S
5、PECIFICATIONS OF SIGNALLING RELATED TO BEARER 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 wit
6、hin the NGN Q.3100Q.3129 Bearer control signalling 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 sup
7、plementary services Q.3600Q.3649 NGN applications Q.3700Q.3849 Testing for next generation networks Q.3900Q.3999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Q.3303.1 (08/2012) i Recommendation ITU-T Q.3303.1 Resource control protocol No. 3 Protocol at the inter
8、face between a Policy Decision Physical Entity (PD-PE) and a Policy Enforcement Physical Entity (PE-PE): COPS alternative version 2 Summary Recommendation ITU-T Q.3301.1 specifies the resource control protocol No. 3 (rcp3) COPS profile at the Rw interface, i.e., between the policy decision physical
9、entity (PD-PE) and the policy enforcement physical entity (PE-PE) in the resource and admission control function block. This protocol profile allows the final admission policy decisions to be installed (i.e., either push or pull mode) to a PE-PE from a PD-PE, supports resource control for both fixed
10、 and mobile networks and supports the network address port translation (NAPT) control and network address translation (NAT) traversal at PE-PEs as needed. It satisfies the requirements for information flows across the Rw reference point as specified in clause 9.2 of ITU-T Y.2111 and in Supplement 51
11、 to the ITU-T Q-series. History Edition Recommendation Approval Study Group 1.0 ITU-T Q.3303.1 2007-08-06 11 2.0 ITU-T Q.3303.1 v2 2012-08-13 11 ii Rec. ITU-T Q.3303.1 (08/2012) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecomm
12、unications, 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 issuing Recommendations on them with a view to standardizing telecommun
13、ications 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 topics. The approval of ITU-T Recommendations is covered by the proced
14、ure 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 expression Administration is used for conciseness to indicate both a telecomm
15、unication 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 applicability) and compliance with the Recommendation is achieved when all of these
16、 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 Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws
17、 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 of claimed Intellectual Property Rights, whether asserted by ITU members or
18、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 Recommendation. However, implementers are cautioned that this may not repre
19、sent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2013 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Q.3303.1 (08/
20、2012) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 3 6 Resource control procedures. 4 6.1 SCE-requested resource control procedures . 4 6.2 UE-requested res
21、ource control procedures . 9 7 Protocol profile specification 11 7.1 Protocol support 11 7.2 Modifications to COPS-PR 11 7.3 COPS basic message 13 8 Rw message description . 14 8.1 Request (REQ PE-PEPD-PE) . 14 8.2 Decision (DEC PD-PEPE-PE) . 14 8.3 Report state (RPT PE-PE PD-PE) 15 8.4 Delete reque
22、st state (DRQ PE-PE PD-PE) . 16 9 COPS parameters reused 16 9.1 Client handle . 16 9.2 Flow ID . 16 9.3 Flow information 16 9.4 Traffic information . 16 9.5 Connection information 17 10 Application of PIB 17 10.1 Role of PIB . 17 10.2 Encoding of PIB . 17 10.3 Definition of PIB 18 11 Security consid
23、erations . 18 Annex A Rw policy information base. 19 Appendix I Rw stage 2 message to COPS message mapping . 57 Appendix II Rw stage 2 message parameters to COPS Object-PIB-PRC-Attribute mapping 58 Bibliography. 61 Rec. ITU-T Q.3303.1 (08/2012) 1 Recommendation ITU-T Q.3303.1 Resource control protoc
24、ol No. 3 Protocol at the interface between a Policy Decision Physical Entity (PD-PE) and a Policy Enforcement Physical Entity (PE-PE): COPS alternative version 2 1 Scope This Recommendation provides the stage 3 technical specifications for the common open policy service (COPS) profile at the interfa
25、ce between the policy decision physical entity (PD-PE) and the policy enforcement physical entity (PE-PE). The functional requirements and the stage 2 specifications for this interface are defined in clause 9.2 of ITU-T Y.2111 and in b-ITU-T Q.Sup51. This protocol profile allows the final admission
26、decisions to be installed (i.e., either push or pull mode) to a PE-PE from a PD-PE, supports the resource control for both fixed and mobile access networks, and supports the network address port translation (NAPT)/firewall control and network address translation (NAT) traversal at the PE-PE as neede
27、d. This Recommendation provides resource control procedure, protocol profile, modifications to COPS, messages and the definition and application of the policy information base (PIB). 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in
28、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 encouraged to investigate the possibility of applying the most recent e
29、dition 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 document, the status of a Recommendation. ITU-T Y.2111 ITU-T Y.2111 (
30、2011), Resource and admission control functions in next generation networks. ETSI TS 129 212 ETSI TS 129 212 V8.16.0 (2012), Universal Mobile Telecommunications System (UMTS); LTE; Policy and Charging Control (PCC) over Gx/Sd reference point (3GPP TS 29.212 version 8.16.0 Release 8). IETF RFC 2748 I
31、ETF RFC 2748 (2000), The COPS (Common Open Policy Service) Protocol. IETF RFC 3084 IETF RFC 3084 (2001), COPS Usage for Policy Provisioning (COPS-PR). IETF RFC 3159 IETF RFC 3159 (2001), Structure of Policy Provisioning Information (SPPI). IETF RFC 3289 IETF RFC 3289 (2002), Management Information B
32、ase for the Differentiated Services Architecture. IETF RFC 3318 IETF RFC 3318 (2003), Framework Policy Information Base. IETF RFC 4001 IETF RFC 4001 (2005), Textual Conventions for Internet Network Addresses. 2 Rec. ITU-T Q.3303.1 (08/2012) 3 Definitions 3.1 Terms defined elsewhere This Recommendati
33、on uses the following terms defined elsewhere: 3.1.1 client handle IETF RFC 2748: The client handle is used to identify a specific request state. 3.1.2 policy information base IETF RFC 3084: The database of policy information. 3.2 Terms defined in this Recommendation This Recommendation defines the
34、following terms: 3.2.1 COPS connection: The term connection is used in this Recommendation to refer to a COPS signalling relationship established between the PD-PE, acting in the role of a COPS Policy Decision Point (PDP), and the PE-PE, acting in the role of a COPS Policy Enforcement Point (PEP). 3
35、.2.2 policy decision physical entity (PD-PE): The PD-PE is an implemented instance of the Policy Decision Functional Entity (PD-FE) as defined in ITU-T Y.2111. 3.2.3 policy enforcement physical entity (PE-PE): The PE-PE is an implemented instance of the Policy Enforcement Functional Entity (PE-FE) a
36、s defined in ITU-T Y.2111. 3.2.4 flow ID: Identifier for the individual media flow within a session. NOTE A flow ID is usually created by the PD-PE. 3.2.5 flow information: Describes the features of the media flow (e.g., filter and filter status) as specified in clause 9.3. 3.2.6 traffic information
37、: Describes the features of the media flow (e.g., peak bandwidth, average bandwidth, and max package length) as specified in clause 9.4. 3.2.7 label stack: Label stack is used to record the multiprotocol label switching (MPLS) network path for a bearer network employing MPLS technology. The informat
38、ion contained in the stack is the labels through a path; the last in first out (LIFO) algorithm is used. 3.2.8 connection information: The core network ingress/egress path information at the PE-PE for a media flow (e.g., label stack or VLAN ID) as specified in clause 9.5. 4 Abbreviations and acronym
39、s This Recommendation uses the following abbreviations and acronyms: AVP Attribute Value Pair CAR Committed Access Rate COPS Common Open Policy Service COPS-PR COPS usage for Policy Provisioning CPE Customer Premises Equipment CPERR Class Provisioning Error (of a PRC) DEC Decision message Diffserv D
40、ifferentiated Services DRQ Delete Request state message DSCP Differentiated Services Code Point Rec. ITU-T Q.3303.1 (08/2012) 3 DS-TE Differentiated Services-Traffic Engineering EPD Encoded Provisioning Instance Data GPERR Global Provisioning Error GPRS General Packet Radio Service IP Internet Proto
41、col LIFO Last In First Out LSP Label Switched Path MAC Media Access Control MPLS Multiprotocol Label Switching NACE Network Attachment Control Entity NAPT Network Address Port Translation NAT Network Address Translation PDP Policy Decision Point PD-PE Policy Decision Physical Entity PEP Policy Enfor
42、cement Point PE-PE Policy Enforcement Physical Entity PIB Policy Information Base PRC Provisioning Class PRI Provisioning Instance (of a PRC) PRID Provisioning Instance Identifier QinQ 802.1Q in 802.1Q QoS Quality of Service REQ Request message RPT Report state message RTCP Real-Time Control Protoco
43、l RTP Real-Time Protocol SCE Service Control Entity SPPI Structure of Policy Provisioning Information TRC-PE Transport Resource Control Physical Entity UDP User Datagram Protocol UE User Equipment UMTS Universal Mobile Telecommunications System VLAN Virtual Local Area Network 5 Conventions None. 4 R
44、ec. ITU-T Q.3303.1 (08/2012) 6 Resource control procedures 6.1 SCE-requested resource control procedures 6.1.1 Procedures at the PD-PE 6.1.1.1 Session initiation 6.1.1.1.1 Transport subscription profile verification The policy decision physical entity (PD-PE) shall verify the transport subscription
45、profile received from the network attachment control entity (NACE) using the globally unique IP address information or transport subscriber identifier as the index. The PD-PE shall derive the quality of service (QoS) class, reservation priority, and maximum uplink/downlink bandwidth based on the res
46、ource requestor identifier, resource request priority and media profile of the resource initiation request received from the service control entity (SCE). The PD-PE shall also verify the transport subscription profile to which the request applies for each IP media flow. In this verification process
47、the derived parameters shall match the information obtained from the NACE. If the transport subscription profile does not contain any data, the PD-PE shall apply a default profile to the request. NOTE The Ru interface is out of the scope of this Recommendation. 6.1.1.1.2 Transport resource detection
48、 and admission The PD-PE shall request the transport resource control physical entity (TRC-PE) for transport resource availability detection and for an admission decision via the Rt interface. The PD-PE shall utilize the result of transport resource availability detection and the admission decision
49、to make the policy decision. NOTE The Rt interface is out of the scope of this Recommendation. 6.1.1.1.3 Initial policy decisions The PD-PE shall make initial policy decisions for all IP media flows conveyed by the resource initiation request from the SCE based on all information described in clause 8.2.5.2 of ITU-T Y.2111, including: service information received from the SCE; transport subscription profiles; service based network
