1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T G.7041/Y.1303 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 3 (01/2015) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Data over Transport Generic aspects General SERIES Y: GLOBAL INFORMA
2、TION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Internet protocol aspects Transport Generic framing procedure Amendment 3 Recommendation ITU-T G.7041/Y.1303 (2011) Amendment 3 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTE
3、RNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE
4、 SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECT
5、IONS AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 General G.7000G.7099 Transport network control aspects G.7700G.7799 PAC
6、KET OVER TRANSPORT ASPECTS G.8000G.8999 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.7041/Y.1303 (2011)/Amd.3 (01/2015) i Recommendation ITU-T G.7041/Y.1303 Generic framing procedure Amendment 3 Summary Amendment 3 to Recommendatio
7、n ITU-T G.7041/Y.1303 (2011) adds payload types and mapping descriptions associated with generic framing procedure (GFP) encapsulation of two types of synchronization messages. The first type of synchronization message is the precision time protocol (PTP) message, used to provide time and phase sync
8、hronization. The second message type is the synchronization status message (SSM), which provides information regarding the quality of the clock source being used by the SSM source. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.7041/Y.1303 2001-12-14 15 11.1002/1000/5644
9、1.1 ITU-T G.7041/Y.1303 (2001) Amd. 1 2002-06-13 15 11.1002/1000/6062 1.2 ITU-T G.7041/Y.1303 (2001) Cor. 1 2003-03-16 15 11.1002/1000/6285 1.3 ITU-T G.7041/Y.1303 (2001) Amd. 2 2003-03-16 15 11.1002/1000/6284 2.0 ITU-T G.7041/Y.1303 2003-12-14 15 11.1002/1000/7082 2.1 ITU-T G.7041/Y.1303 (2003) Amd
10、. 1 2004-10-07 15 11.1002/1000/7352 2.2 ITU-T G.7041/Y.1303 (2003) Amd. 2 2004-06-13 15 11.1002/1000/7353 2.3 ITU-T G.7041/Y.1303 (2003) Cor. 1 2005-01-13 15 11.1002/1000/7476 2.4 ITU-T G.7041/Y.1303 (2003) Amd. 3 2005-01-13 15 11.1002/1000/7475 3.0 ITU-T G.7041/Y.1303 2005-08-22 15 11.1002/1000/852
11、8 3.1 ITU-T G.7041/Y.1303 (2005) Amd. 1 2006-03-29 15 11.1002/1000/8769 3.2 ITU-T G.7041/Y.1303 (2005) Cor. 1 2006-12-14 15 11.1002/1000/8997 3.3 ITU-T G.7041/Y.1303 (2005) Amd. 2 2007-07-29 15 11.1002/1000/9170 4.0 ITU-T G.7041/Y.1303 2008-10-07 15 11.1002/1000/9399 4.1 ITU-T G.7041/Y.1303 (2008) A
12、md. 1 2009-01-13 15 11.1002/1000/9655 4.2 ITU-T G.7041/Y.1303 (2008) Amd. 2 2010-07-29 15 11.1002/1000/10893 5.0 ITU-T G.7041/Y.1303 2011-04-13 15 11.1002/1000/11133 5.1 ITU-T G.7041/Y.1303 (2011) Amd. 1 2012-02-13 15 11.1002/1000/11506 5.2 ITU-T G.7041/Y.1303 (2011) Amd. 2 2012-10-29 15 11.1002/100
13、0/11799 5.3 ITU-T G.7041/Y.1303 (2011) Amd. 3 2015-01-13 15 11.1002/1000/12378 _ * 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. IT
14、U-T G.7041/Y.1303 (2011)/Amd.3 (01/2015) 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 or
15、gan 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 Standardization Assembly (WTSA), which meets every four years, establishes the
16、 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 technology which fall within ITU-Ts purview, the necessary standards are
17、 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 with this Recommendation is voluntary. However, the Recommendati
18、on 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 obligatory language such as “must“ and the negative equivalents are used
19、 to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectu
20、al 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 the date of approval of this Recommendation, ITU had received notice
21、 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 consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 201
22、5 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 G.7041/Y.1303 (2011)/Amd.3 (01/2015) 1 Recommendation ITU-T G.7041/Y.1303 Generic framing procedure Amendment 3 1) Clause 2, References Add the follo
23、wing new references to clause 2: ITU-T G.781 Recommendation ITU-T G.781 (2008), Synchronization layer functions. ITU-T G.8275.1 Recommendation ITU-T G.8275.1 (2014), Precision time protocol telecom profile for phase/time synchronization with full timing support from the network. 2) Clause 4, Abbrevi
24、ations and acronyms Add the following acronym definitions to clause 4: PTP Precision Time Protocol SSM Synchronization Status Message 3) Clause 6.1.3.1, Client data frames Add two new PTI definitions to Table 6-3 as follows: Table 6-3 User payload identifiers for GFP client frames PTI = 000 and 101
25、(See Notes 2 and 3) Type bits GFP frame payload area . . . 0001 0110 Precision time protocol (PTP) message 0001 0111 Synchronization status message 0001 01100001 1000 through 1110 1111 Reserved for future standardization . . . 4) Add new clause Add new clause 7.10 as follows: 2 Rec. ITU-T G.7041/Y.1
26、303 (2011)/Amd.3 (01/2015) 7.10 Precision time protocol The precision time protocol (PTP) uses packets to communicate highly accurate frequency, phase and time-of-day information. PTP messages are encapsulated in GFP-F frames as illustrated in Figure 7-13. The content of the PTP common message heade
27、r and message fields are defined in ITU-T G.8275.1. The types of PTP messages used for a given application are defined in the Recommendation associated with that application. Figure 7-13 PTP message mapping into GFP-F 5) Add new clause Add new clause 7.11 as follows: 7.11 Synchronization status mess
28、ages A synchronization status message (SSM) provides information regarding the quality of the clock source being used by the SSM source. An SSM is encapsulated in GFP-F frames as illustrated in Figure 7-14. The contents of the SSM are defined in ITU-T G.781. Figure 7-14 SSM mapping into GFP-F ITU-T
29、Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Services, applications and middleware Y.200Y.299 Network aspects Y.300Y.399 Interfaces and protocols Y.400Y.499 Numbering, addressin
30、g and naming Y.500Y.599 Operation, administration and maintenance Y.600Y.699 Security Y.700Y.799 Performances Y.800Y.899 INTERNET PROTOCOL ASPECTS General Y.1000Y.1099 Services and applications Y.1100Y.1199 Architecture, access, network capabilities and resource management Y.1200Y.1299 Transport Y.1
31、300Y.1399 Interworking Y.1400Y.1499 Quality of service and network performance Y.1500Y.1599 Signalling Y.1600Y.1699 Operation, administration and maintenance Y.1700Y.1799 Charging Y.1800Y.1899 IPTV over NGN Y.1900Y.1999 NEXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000Y.2
32、099 Quality of Service and performance Y.2100Y.2199 Service aspects: Service capabilities and service architecture Y.2200Y.2249 Service aspects: Interoperability of services and networks in NGN Y.2250Y.2299 Enhancements to NGN Y.2300Y.2399 Network management Y.2400Y.2499 Network control architecture
33、s and protocols Y.2500Y.2599 Packet-based Networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 Carrier grade open environment Y.2900Y.2999 FUTURE NETWORKS Y.3000Y.3499 CLOUD COMPUTING Y.3500Y.3999 For further details, please refer to the list of ITU-T Recommendations. Printe
34、d in Switzerland Geneva, 2015 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmissi
35、on systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construct
36、ion, installation and protection of cables and other elements of outside plant Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P
37、 Terminals and subjective and objective assessment methods Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems
