1、 International Telecommunication Union ITU-T G.9970TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2009) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Access networks In premises networks Generic home network transport architecture Recommendation ITU-T G.9970 ITU-T G-SER
2、IES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL 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
3、 METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE 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.600
4、G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 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.79
5、99 PACKET OVER TRANSPORT ASPECTS G.8000G.8999ACCESS NETWORKS G.9000G.9999 In premises networks G.9950G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.9970 (01/2009) i Recommendation ITU-T G.9970 Generic home network transport architecture Summary Recommenda
6、tion ITU-T G.9970 describes the generic architecture for home networks and their interfaces to the operators broadband access networks. Source Recommendation ITU-T G.9970 was approved on 13 January 2009 by ITU-T Study Group 15 (2009-2012) under Recommendation ITU-T A.8 procedures. ii Rec. ITU-T G.99
7、70 (01/2009) 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. ITU-T is respons
8、ible 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 study by the ITU
9、-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 collaborative
10、 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 certain manda
11、tory 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 requirements. The
12、 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 Right. ITU takes
13、 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 intellectual propert
14、y, 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 2009 All rights reserved. N
15、o part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T G.9970 (01/2009) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 2 4 Abbreviations 2 5 Conventions 4 6 Generic home network architecture 4 6.1 Application layer ge
16、neric home network model 4 6.2 Transport layer generic home network model 4 6.3 Relationship between the home network architecture for the transport layer and that of the application layer 9 7 Possible demarcation points . 12 7.1 Possible demarcation points for IP terminals . 12 7.2 Possible demarca
17、tion points for non-IP terminals 12 8 High level requirements 13 8.1 QoS control. 13 8.2 Device management . 14 8.3 IP addressing 16 8.4 Security. 17 Annex A The relationship between Recommendation ITU-T G.9960 and this Recommendation 18 Appendix I Example applications of the generic home network ar
18、chitecture 20 Bibliography. 22 iv Rec. ITU-T G.9970 (01/2009) Introduction As the use of electronics and communications equipment proliferates in the home, as well as their technologies and protocols, there have been several proposals for standardization of equipment, transport and networking within
19、 the “home network“. Recommendation ITU-T G.9970 proposes the generic home network architecture for the transport layer that can become the platform for the development of home networking standards. Rec. ITU-T G.9970 (01/2009) 1 Recommendation ITU-T G.9970 Generic home network transport architecture
20、 1 Scope Considering that, in the future, the home network will be interconnected with the next generation network (NGN), this Recommendation describes the generic home network architecture from the viewpoint of the NGN architecture. ITU-T Y.2012 defines the transport stratum as well as the service
21、stratum. Considering these, the generic home network architecture can be separately discussed both in the transport layer categorized in the transport stratum and the application layer categorized in the service stratum. This Recommendation references the former model. Note that the latter model is
22、specified in the companion recommendation, ITU-T H.622. Its detail will be described in clause 6. This Recommendation discusses the interfaces between access networks and home networks, including interfaces within home networks as well as legacy interfaces. However, interfaces for off-air broadcast
23、services are not considered in this Recommendation. Interfaces in the home network as well as the interface to the access network are shown as reference points, while proposed demarcation points for the customer and the operator are also shown in this Recommendation. Moreover, this Recommendation id
24、entifies key transport technologies for an operator to consider when providing services relevant to home networking. In summary, this Recommendation addresses layer 3 of the home network architecture, while ITU-T G.9960 addresses the home network architecture in layers 2 and 1. Moreover, this Recomm
25、endation describes the high level requirements for layer 2 and 3 transport technologies from the viewpoint of the interaction between access network and home network, while one of the detailed requirements and specifications for the layer 2 transport technologies within the home network can be found
26、 in ITU-T G.9960. The detailed description regarding the relationship between this Recommendation and ITU-T G.9970 can be found in Annex A. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Re
27、commendation. 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 edition of the Recommendations and other ref
28、erences 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 G.9954 Recommendation ITU-T G.9954 (2007), Home networking trans
29、ceivers Enhanced physical, media access, and link layer specifications. ITU-T G.9960 Recommendation ITU-T G.9960 (2009), Next generation home networking transceivers. ITU-T H.610 Recommendation ITU-T H.610 (2003), Full service VDSL System architecture and customer premises equipment. ITU-T H.622 Rec
30、ommendation ITU-T H.622 (2008), A generic home network architecture with support for multimedia services. ITU-T J.190 Recommendation ITU-T J.190 (2002), Architecture of MediaHomeNet that supports cable-based services. 2 Rec. ITU-T G.9970 (01/2009) ITU-T X.1111 Recommendation ITU-T X.1111 (2007), Fra
31、mework of security technologies for home network. ITU-T Y.1541 Recommendation ITU-T Y.1541 (2006), Network performance objectives for IP-based services. ITU-T Y.2012 Recommendation ITU-T Y.2012 (2006), Functional requirements and architecture of the NGN release 1. ITU-R M.1450 Recommendation ITU-R M
32、.1450 (2008), Characteristics of broadband radio local area networks. ITU-R M.1801 Recommendation ITU-R M.1801 (2007), Radio interface standards for broadband wireless access systems, including mobile and nomadic applications, in the mobile service operating below 6 GHz. ISO/IEC 15045-1 ISO/IEC 1504
33、5-1 (2004), Information technology Home electronic system (HES) gateway Part 1: A residential gateway model for HES. TR-069 Amd.1 Broadband Forum TR-069 Amendment 1 (2006), CPE WAN management protocol. TR-094 Broadband Forum TR-094 (2004), Multi-Service Delivery Framework for Home Networks. TR-098 B
34、roadband Forum TR-098 Amendment 2 (2008), Internet Gateway Device Data Model for TR-069. TR-104 Broadband Forum TR-104 (2005), DSLHome Provisioning Parameters for VoIP CPE. TR-135 Broadband Forum TR-135 (2007), Data Model for TR-069 Enabled STB. 3 Definitions The new terminologies are defined in cla
35、use 6. 4 Abbreviations This Recommendation uses the following abbreviations: AGAF Access Gateway Application layer Function AGTF Access Gateway Transport layer Function AGW Access Gateway ALDF Application Layer Device Function ASG Application Service Gateway B-NT Broadband Network Termination CPE Cu
36、stomer Premises Equipment DHCP Dynamic Host Configuration Protocol DSCP Differentiated Services Code Point Rec. ITU-T G.9970 (01/2009) 3 EU End User EUT End User Terminal FPD Functional Processing Device FPD/T Functional Processing Device and Terminal GW Gateway HA Home Access HB Home Bridge HC Home
37、 Client HD Home Decoder ICMP Internet Control Message Protocol IMS IP Multimedia Subsystem IP Internet Protocol IPTV Internet Protocol TeleVision LANT Local Area Network side Termination NGN Next Generation Network NP Network Provider NW Network OSGi Open Service Gateway initiative PC Personal Compu
38、ter PLC Power Line Communication POTS Plain Old Telephone Service PPP Point to Point Protocol PS POTS Splitter QoS Quality of Service RG Routing Gateway RMS Remote Management Server RSVP Resource ReSerVation Protocol SIP Session Initiation Protocol SNMP Simple Network Management Protocol SP Service
39、Provider STB Set Top Box TV Television Set VDSL Very high-speed Digital Subscriber Line VTP/D VDSL Termination Processing or VDSL Termination Processing and Decoding WANT Wide Area Network side Termination 4 Rec. ITU-T G.9970 (01/2009) 5 Conventions None. 6 Generic home network architecture 6.1 Appl
40、ication layer generic home network model Before discussing the generic home network architecture in the transport layer, the application layer architecture is described in this clause. ITU-T H.622 addresses the home network architecture for the application model, as shown in Figure 6-1. Figure 6-1 A
41、pplication model of the home network A primary terminal is a terminal device that can interact with the access network or with service functionalities beyond the access network without the assistance of another terminal, and is the service end-point where the service from the service provider is ter
42、minated. A secondary terminal is a terminal device that has no direct interactive capability with network side entities or needs to rely on another terminal to do so. A primary domain is the logically defined area of the home network that interconnects the primary terminal and the access GW. A secon
43、dary domain is a logically defined area of the home network that interconnects terminals. The devices and traffic dedicated to the secondary domain do not need to be configured to be reachable to/from the access network. 6.2 Transport layer generic home network model G.9970(09)_F6-2AccessnetworkAGTF
44、IPhome networkIPterminalNon-IPgatewayNon-IPhome networkNon-IPterminalNon-IPterminalNon-IPhome networkNon-IPterminalFigure 6-2 Generic home network functional architecture for the transport layer In Figure 6-2, the home network is shown as an “IP home network“ using IP, and a “non-IP home network“ us
45、ing other specific technologies or protocols. A gateway between the “access network“ and the “IP home network“ is called the “access gateway transport layer function (AGTF)“, while a gateway between an “IP home network“ and a “non-IP home network“ is called a “non-IP GW“. The non-IP terminal at the
46、bottom right of Figure 6-2 is a legacy terminal, such as an analogue CPE, which is directly connected to the access network, bypassing the home network. Rec. ITU-T G.9970 (01/2009) 5 The following clauses will describe the terminology relevant to the home network architecture for the transport layer
47、. Note that this is the functional architecture. For example, both the “IP home network“ and the “non-IP GW“ can be collapsed in the case that the “non-IP home network“ is directly connected to “AGTF“; in this case, the “IP home network“ and “non-IP GW“ functions are contained in one physical access
48、 gateway device. Moreover, one port of the physical access gateway device may serve the “IP home network“, while another port of the same physical access gateway device may serve the “non-IP home network“. 6.2.1 IP home network The “IP home network“ is the network that carries IPv4 or IPv6 data, i.e
49、., it corresponds to “IPCable2Home domain“ in ITU-T J.190 or to “premises distribution“ in TR-094. Note that the HB in ITU-T J.190 can be one of the elements composing the “IP home network“. 6.2.2 Non-IP home network A “non-IP home network“ is composed of one or more networks, each of which has its own non-IP technology or protocol. A “non-IP home network“ corresponds to the “proprietary domain“ in ITU-T J.190, and also corresponds to the “supplementary application network“ or the conn
