1、 International Telecommunication Union ITU-T Q.3303.2TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2014) 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) (Rw interface): ITU-T H.248 alternative version 2 Recommendation ITU-T Q.3303.2 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SE
3、MI-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 SYSTEMS No. 4, 5, 6, R1 AND R2 Q.120Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.699 SPE
4、CIFICATIONS OF SIGNALLING 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 I
5、MT-2000 Q.1700Q.1799 SPECIFICATIONS 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
6、 data organization within 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
7、 control protocols supplementary 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.3303.2 (03/2014) i Recommendation ITU-T Q.3303.2 Resource control protocol No. 3
8、 Protocol at the interface between a policy decision physical entity (PD-PE) and a policy enforcement physical entity (PE-PE) (Rw interface): ITU-T H.248 alternative version 2 Summary Recommendation ITU-T Q.3303.2 specifies the resource control protocol No. 3 (rcp3) ITU-T H.248 profile used at the R
9、w interface, i.e., between the policy decision physical entity (PD-PE) and the policy enforcement physical entity (PE-PE) in the resource and admission control functional block. This protocol profile allows the final admission policy decisions to be installed (either push or pull mode) to a PE-PE fr
10、om a PD-PE, supports resource control for both fixed and mobile networks and supports the network address and port translation (NAPT) control and network address translation (NAT) traversal at the PE-PEs as needed. It satisfies the requirements for information flows across the Rw reference point as
11、specified in clause 8.2 of Recommendation ITU-T Y.2111. It is also used to control the PE-PE in transport devices, including quality of service (QoS) resource control (e.g., packet marking, filtering and policing) and gate control. This version of the Recommendation improves the published version 1
12、in 2007 and adds additional features to satisfy the full requirements as defined in Recommendation ITU-T Y.2111, based on the developments and progresses of both ITU-T Y.2111 and ITU-T H.248 protocols. New functional packages as well as their procedures are introduced in this version such as “hangin
13、g termination detection“, “statistics conditional reporting“, “IP realm availability“ and “Pull mode“. Meanwhile, a number of changes are made to refine the profile definitions and the details. History Edition Recommendation Approval Study Group Unique ID*1.0 ITU-T Q.3303.2 2007-08-06 11 11.1002/100
14、0/9120 2.0 ITU-T Q.3303.2 v2 2014-03-29 11 11.1002/1000/12165 _ *To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T Q.3303.2 (03/2
15、014) 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. ITU-T is responsible for
16、 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 study by the ITU-T study
17、 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 collaborative basis w
18、ith 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 certain mandatory pro
19、visions (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 requirements. The use of
20、 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 Right. ITU takes no pos
21、ition 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 received notice of intellectual property, protecte
22、d 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 2014 All rights reserved. No part of t
23、his publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Q.3303.2 (03/2014) 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 a
24、cronyms 3 5 Conventions 5 6 Rw interface protocol specification (ITU-T H.248 profile description) . 6 6.1 Profile identification . 6 6.2 Gateway control protocol version 6 6.3 Connection model . 6 6.4 Context attributes 6 6.5 Terminations . 7 6.6 Descriptors 10 6.7 Command API 14 6.8 Generic command
25、 syntax and encoding . 18 6.9 Transactions 19 6.10 Messages . 19 6.11 Transport . 20 6.12 Security . 20 6.13 Packages . 20 6.14 Mandatory support of SDP and Annex C information elements 48 6.15 Optional support of SDP and Annex C information elements . 50 6.16 Overview of procedures . 52 6.17 Sessio
26、n dependent procedures (command level details) 73 6.18 Non-session related use cases . 73 6.19 Session independent procedures (command level details) . 73 7 Security considerations . 73 Appendix I Overview of specific policing functions in the policy enforcement physical entity . 75 I.1 Categorizati
27、on attempt 75 I.2 Support by Rw ITU-T H.248 profile version 2 76 Appendix II Overview of statistics in the policy enforcement physical entity . 77 II.1 Introduction 77 II.2 Overview of ITU-T H.248 statistics . 77 II.3 Mapping statistics on the IP-to-IP interworking model . 79 Appendix III Difference
28、s between ETSI ES 283 018 and this Recommendation . 80 Bibliography. 84 Rec. ITU-T Q.3303.2 (03/2014) 1 Recommendation ITU-T Q.3303.2 Resource control protocol No. 3 Protocol at the interface between a policy decision physical entity (PD-PE) and a policy enforcement physical entity (PE-PE) (Rw inter
29、face): ITU-T H.248 alternative version 2 1 Scope This Recommendation provides the stage 3 technical specifications for the ITU-T H.248 profile of the Rw interface. The functional requirements and the stage 2 specifications of the Rw interface are contained in ITU-T Y.2111. The Rw interface is the in
30、terface between a policy decision physical entity (PD-PE) and a policy enforcement physical entity (PE-PE). 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of pub
31、lication, 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 listed below. A list of
32、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 H.248.1 Recommendation ITU-T H.248.1 (2013), Gateway control protocol: Version 3. ITU-T H.248.4
33、Recommendation ITU-T H.248.4 (2009), Gateway control protocol: Transport over Stream Control Transmission Protocol (SCTP). ITU-T H.248.8 Recommendation ITU-T H.248.8 (2013), Gateway control protocol: Error code and service change reason description. ITU-T H.248.11 Recommendation ITU-T H.248.11 (2013
34、), Gateway control protocol: Media gateway overload control package. ITU-T H.248.14 Recommendation ITU-T H.248.14 (2009), Gateway control protocol: Inactivity timer package. ITU-T H.248.36 Recommendation ITU-T H.248.36 (2013), Gateway control protocol: Hanging Termination Detection package. ITU-T H.
35、248.37 Recommendation ITU-T H.248.37 (2008), Gateway control protocol: IP NAPT traversal package. ITU-T H.248.40 Recommendation ITU-T H.248.40 (2013), Gateway control protocol: Application data inactivity detection package. ITU-T H.248.41 Recommendation ITU-T H.248.41 (2013), Gateway control protoco
36、l: IP domain connection package. ITU-T H.248.43 Recommendation ITU-T H.248.43 (2008), Gateway control protocol: Packages for gate management and gate control. ITU-T H.248.45 Recommendation ITU-T H.248.45 (2006), Gateway control protocol: MGC information package. ITU-T H.248.47 Recommendation ITU-T H
37、.248.47 (2008), Gateway control protocol: Statistic conditional reporting package. 2 Rec. ITU-T Q.3303.2 (03/2014) ITU-T H.248.48 Recommendation ITU-T H.248.48 (2008), Gateway control protocol: Statistic conditional reporting package. ITU-T H.248.49 Recommendation ITU-T H.248.49 (2007), Gateway cont
38、rol protocol: Session description protocol RFC and capabilities packages. ITU-T H.248.52 Recommendation ITU-T H.248.52 (2008) Amendment 1 (2009), Gateway control protocol: QoS Support packages. ITU-T H.248.53 Recommendation ITU-T H.248.53 (2009), Gateway control protocol: Traffic Management packages
39、. ITU-T H.248.54 Recommendation ITU-T H.248.54 (2007), Gateway control protocol: MPLS support package. ITU-T H.248.55 Recommendation ITU-T H.248.55 (2008), Gateway control protocol: Generic pull mode package. ITU-T H.248.56 Recommendation ITU-T H.248.56 (2007), Gateway control protocol: Packages for
40、 virtual private network support. ITU-T H.248.57 Recommendation ITU-T H.248.57 (2013), Gateway control protocol: RTP control protocol package. ITU-T H.248.58 Recommendation ITU-T H.248.58 (2008), Gateway control protocol: Packages for application level H.248 statistics. ITU-T H.248.65 Recommendation
41、 ITU-T H.248.65 (2009) Gateway control protocol: Support of the resource reservation protocol. ITU-T Y.2012 Recommendation ITU-T Y.2012 (2010), Functional requirements and architecture of next generation networks1. ITU-T Y.2111 Recommendation ITU-T Y.2111 (2011), Resource and admission control funct
42、ions in next generation networks. IETF RFC 1123 IETF RFC 1123 (1989), Requirements for Internet Hosts - Application and Support. IETF RFC 3264 IETF RFC 3264 (2002), An Offer/Answer Model with Session Description Protocol (SDP). IETF RFC 4566 IETF RFC 4566 (2006), SDP: Session Description Protocol. I
43、ETF RFC 5234 IETF RFC 5234 (2008), Augmented BNF for Syntax Specifications: ABNF. 3 Definitions 3.1 Terms defined elsewhere None. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 gate: A construct used to enable or disable the forwarding of IP packets b
44、ased 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 that in conformance to the same set of policy decisions. NOTE The ITU-T H.248 gate (and pinhole) concept is depicted in Annex A of b-ETSI ES 283 018. Rec.
45、ITU-T Q.3303.2 (03/2014) 3 3.2.2 gate control: The operation of opening or closing a gate. When a gate is open, the packets in the media flows are allowed to pass through; when a gate is closed, the packets in the media flows are not allowed to pass through. 3.2.3 IP-to-IP interworking modes: The av
46、ailable session description protocol (SDP) information elements and values in the signalled SDP “media description“ (mainly “m=“ and “a=“ lines) by the policy decision entity (MGC), may be used to categorize following interworking modes from policy enforcement entity (MG) perspective: (1) “Media-agn
47、ostic“: the “m=“ line values of media type () and media format () are not allowing to terminate the PE-PE (MG) on the transported “media“ information. (2) “Media-aware“: the “m=“ line values of media type (), transport protocol () and media format () unambiguously define the entire protocol stack of
48、 the ITU-T H.248 IP termination, i.e., the PE-PE (MG) is cognizant of transported “media“ information and the underlying transport protocol type. (3) “Transport protocol-agnostic“ (or briefly “transport-agnostic“): the PE-PE (MG) may not conclude from signalled SDP information elements on the transp
49、orted IP payload information (Note 1). (4) “Transport protocol-aware“ (or briefly “transport-aware“): the value of the IP protocol field is indicated by the signalled SDP information elements, e.g., by the “m=“ line value of the transport protocol () field. NOTE The PE-PE (MG) could principally derive the used transport protocol by analysing the protocol field (http:/www.iana.org/assignments/protocol-numbers) in the IP he
