1、 International Telecommunication Union ITU-T Q.3949TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (08/2012) SERIES Q: SWITCHING AND SIGNALLING Signalling requirements and protocols for the NGN Testing for next generation networks Real-time multimedia service testing framework at the user-to-network
2、 interface of next generation networks Recommendation ITU-T Q.3949 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 THE ISDN Q.60Q.9
3、9 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 DIGITAL SUBSCRIBER
4、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 CALL CONTROL
5、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.3130Q.3179 Signall
6、ing and control requirements and protocols to support attachment in NGN environments Q.3200Q.3249 Resource control protocols Q.3300Q.3369 Service and session control protocols Q.3400Q.3499 Service and session control protocols supplementary services Q.3600Q.3649 NGN applications Q.3700Q.3849 Testing
7、 for next generation networks Q.3900Q.3999For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Q.3949 (08/2012) i Recommendation ITU-T Q.3949 Real-time multimedia service testing framework at the user-to-network interface of next generation networks Summary Recommendati
8、on ITU-T Q.3949 describes the procedures, requirements, physical configurations and standard document sets for real-time multimedia service testing at the user-to-network interface (UNI) of next generation networks (NGNs). History Edition Recommendation Approval Study Group 1.0 ITU-T Q.3949 2012-08-
9、13 11 Keywords Multimedia, NGN, service testing, UNI, video communication. ii Rec. ITU-T Q.3949 (08/2012) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU T
10、elecommunication 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 worldwide basis. The World Telecommunication Standardizati
11、on 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 WTSA Resolution 1. In some areas of information technol
12、ogy 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 administration and a recognized operating agency. Compliance
13、 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 mandatory provisions are met. The words “shall“ or some other obligat
14、ory 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 attention to the possibility that the practice or implementation
15、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 others outside of the Recommendation development process. As of th
16、e 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 represent the latest information and are therefore strongly urged to co
17、nsult 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.3949 (08/2012) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definit
18、ions 2 4 Abbreviations and acronyms 2 5 Conventions 2 6 Preparation for testing. 3 6.1 Test object 3 6.2 Target interface . 4 6.3 Target Recommendation 4 6.4 Physical configuration 4 6.5 Test scenarios of NIT . 5 6.6 Test scenario of multimedia interoperability testing of the end-to-end service . 11
19、 7 Analysis of test results 13 7.1 Test report production 13 Appendix I The applicable testing items for ITU-T Q.3945 (The types and list of NGN services testing on the Model networks. Test set 1) . 18 Bibliography. 20 iv Rec. ITU-T Q.3949 (08/2012) Introduction The World Telecommunication Standardi
20、zation Assembly 2008 (WTSA-08) approved Resolution 76, “Studies related to conformance and interoperability testing, assistance to developing countries, and a possible future ITU Mark programme“, and assigned to all ITU-T study groups the responsibility of developing conformance and interoperability
21、 Recommendations to improve the interoperability of next generation networks (NGNs). Recommendation ITU-T Q.3948 defines a voice over IP (VoIP) service testing framework at the NGN user-to-network interface (UNI), and provides a simple procedure for NGN service end-to-end testing that is useful for
22、NGN operators and equipment vendors. A series of service testing framework specifications based on ITU-T Q.3948 is thus required. This Recommendation, ITU-T Q.3949, describes the multimedia service testing based on the methods in ITU-T Q.3948. Rec. ITU-T Q.3949 (08/2012) 1 Recommendation ITU-T Q.394
23、9 Real-time multimedia service testing framework at the user-to-network interface of next generation networks 1 Scope This Recommendation describes the real-time multimedia service testing framework at the user-to-network interface (UNI) in next generation networks (NGNs). This Recommendation define
24、s the preparation for NGN multimedia service testing, physical configuration, test scenarios and test report production. The real-time multimedia service defined in this Recommendation covers services including voice and video communication, video conferencing and data sharing. Specifically, this Re
25、commendation describes video communication service testing specifications. In the future, other multimedia services will be covered. The test check sheets described in clause 7.1 are useful for NGN operators, service providers and vendors when testing their services or products. 2 References The fol
26、lowing ITU-T Recommendations and 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 Rec
27、ommendation are therefore encouraged 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 no
28、t give it, as a stand-alone document, the status of a Recommendation. ITU-T G.711 Recommendation ITU-T G.711 (1984), Pulse code modulation (PCM) of voice frequencies. ITU-T H.264 Recommendation ITU-T H.264 (2009), Advanced video coding for generic audiovisual services. ITU-T Q.3402 Recommendation IT
29、U-T Q.3402 (2008), NGN UNI signalling profile (Protocol set 1). ITU-T Q.3903 Recommendation ITU-T Q.3903 (2008), Formalized presentation of testing results. ITU-T Q.3945 Recommendation ITU-T Q.3945 (2011), Test specifications for next generation network services on model networks Test set 1. ITU-T Q
30、3948 Recommendation ITU-T Q.3948 (2011), Service testing framework for VoIP at the user-to-network interface of next generation networks. ITU-T Y.2012 Recommendation ITU-T Y.2012 (2010), Functional requirements and architecture of next generation networks. IETF RFC 3261 IETF RFC 3261 (2002), SIP: S
31、ession Initiation Protocol. IETF RFC 3262 IETF RFC 3262 (2002), Reliability of Provisional Responses in Session Initiation Protocol (SIP). IETF RFC 3264 IETF RFC 3264 (2002), An Offer/Answer Model with Session Description Protocol (SDP). IETF RFC 3311 IETF RFC 3311 (2002), The Session Initiation Pro
32、tocol (SIP) UPDATE Method. 2 Rec. ITU-T Q.3949 (08/2012) IEFT RFC 3550 IETF RFC 3550 (2003), RTP: A Transport Protocol for Real-Time Applications. IETF RFC 3551 IETF RFC 3551 (2003), RTP Profile for Audio and Video Conferences with Minimal Control. IETF RFC 4028 IETF RFC 4028 (2005), Session Timers
33、in the Session Initiation Protocol (SIP). IETF RFC 4566 IETF RFC 4566 (2006), SDP: Session Description Protocol. IETF RFC 5391 IETF RFC 5391 (2008), RTP Payload Format for ITU-T Recommendation G.711.1. IETF RFC 6184 IETF RFC 6184 (2011), RTP Payload Format for H.264 Video. IETF RFC 6416 IETF RFC 641
34、6 (2011), RTP Payload Format for MPEG-4 Audio/Visual Streams. 3 Definitions None. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: MPEG Moving Picture Experts Group NGN Next Generation Network NIT Network Integration Test PICS Protocol Implementation Co
35、nformance Statements PIXIT Protocol Implementation Extra Information for Testing QoS Quality of Service RFC Request for Comments RTCP RTP Control Protocol RTP Real-Time Transport Protocol SCF Service Control Functions SDP Session Description Protocol SIP Session Initiation Protocol TCP Transmission
36、Control Protocol UA User Agent UDP User Datagram Protocol UNI User-to-Network Interface 5 Conventions None. Rec. ITU-T Q.3949 (08/2012) 3 6 Preparation for testing 6.1 Test object Test objects used in multimedia service are specified within multiple ITU-T Recommendations and other standards developm
37、ent organization (SDO) documents, as referenced in this Recommendation. Figure 6-1 shows the block diagram for a SIP multimedia communication terminal. Q.3949(12)_F01Video I/O elementVideo codecMPEG4, ITU-T H.264Audio I/O elementAudio codecITU-T G.711, ITU-T G.722,ITU-T G.711.1RTP/RTCPRFC3550, RFC35
38、51,RFC6416, RFC6184,RFC5391Local areanetworkinterfaceSystem controluser interfaceSIPRFC3261, RFC3262, RFC3264, RFC3311, RFC4028SDPRFC4566Figure 6-1 SIP multimedia communication terminal Test profiles should include a list of Recommendations related to the test object of multimedia service testing. T
39、able 6-1 shows the coding schemes and profiles for a SIP multimedia communication terminal. Table 6-1 SIP multimedia communication terminal coding schemes and profiles Item VoIP MPEG-4 ITU-T H.264 Session Control SIP (RFC 3261), SDP (RFC 4566) Capability Exchange RFC 3264 RFC 3264, RFC 6416 RFC 3264
40、 RFC 6184 SIP extensions RFC 3262 (Reliability of provisional responses) RFC 3311 (UPDATE) RFC 4028 (Session Timers) Media Transfer RTP (RFC 3550, RFC 3551), RTCP (RFC 3550 Option) RFC 3551 Packetization mode (RFC 6416) Packetization Mode (RFC 6184) Video QCIF mode None MPEG-4 Visual SPL0 CIF mode
41、SD mode MPEG-4 Visual SPL4a ITU-T H.264 BPL3 HD mode ITU-T H.264 BPL3.1 ITU-T H.264 HPL4 Audio ITU-T G.711 /a-Law (Recommend), ITU-T G.722, ITU-T G.711.1 (Optional) 4 Rec. ITU-T Q.3949 (08/2012) 6.2 Target interface The UNI interface, shown in the lower left of Figure 6-2, is the target interface fo
42、r which multimedia service testing is described in this Recommendation. Service StratumTransport StratumTransport FunctionsTransport Control FunctionsService Control and Content Delivery FunctionsApplicationsApplication Support Functions and Service Support FunctionsService Control FunctionsContent
43、Delivery FunctionsNetwork Attachment and Control FunctionsResource and Admission control FunctionsMobility Management and Control FunctionsEnd-User FunctionsFunctions from Other NetworksFunctionsfrom other Service ProvidersANINNISNIUNIService User ProfilesTransport User ProfilesIdM FunctionsManageme
44、nt FunctionsControlMediaManagementIdMNOTE Figure 6-2 is an exact replica of Figure 7-1 of ITU-T Y.2012. Figure 6-2 UNI as the target interface (ITU-T Y.2012 NGN architecture overview) 6.3 Target Recommendation ITU-T Q.3402 defines the NGN UNI signalling profile (Protocol set 1), and is the target Re
45、commendation for which multimedia service testing is described in this Recommendation. 6.4 Physical configuration The physical configuration for multimedia service testing should define the functions needed for service testing. However, the physical configuration may depend on the target protocol. T
46、his clause shows the test configuration for two test cases of network under test (NUT): the network integration test (NIT) test case, and the interoperability testing of the end-to-end service test case. Figure 6-3 shows one case of the general configuration of NIT for the multimedia service testing
47、 at UNI. In this figure, the reference machine is similar to the network. Figure 6-4 shows one case of the general configuration of multimedia interoperability testing of the end-to-end service. Rec. ITU-T Q.3949 (08/2012) 5 Q.3949(12)_F03Tester(Reference machine)UNITest subject(Product)Figure 6-3 G
48、eneral configuration case of NIT for multimedia service testing Q.3949(12)_F04Terminal-A(Reference machine)UNI UNITest subject(Product: Terminal-B)NGNFigure 6-4 General configuration case of multimedia interoperability testing of the end-to-end service 6.5 Test scenarios of NIT The following is an e
49、xample of the NIT for multimedia service testing at UNI. 6.5.1 Test items Following are several example test items: a) Terminal registration b) Negotiating SIP capabilities c) Audio and video behaviour of the terminal. Refer to Table 6-2 for details. Table 6-2 List of sequences of NIT No. Sequence Name 1 Terminal registration 2 Call sending and Call receiving 3 Audio communication and Video communication 4 Update of Session Timer 5 Call disconnection 6 Deletion of terminal registra
