1、 International Telecommunication Union ITU-T Y.2205TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (09/2008) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks Service aspects: Service capabilities and service architecture Nex
2、t Generation Networks Emergency telecommunications Technical considerations Recommendation ITU-T Y.2205 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Services, applications
3、 and middleware Y.200Y.299 Network aspects Y.300Y.399 Interfaces and protocols Y.400Y.499 Numbering, addressing 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 applicati
4、ons Y.1100Y.1199 Architecture, access, network capabilities and resource management Y.1200Y.1299 Transport Y.1300Y.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.18
5、99 NEXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000Y.2099 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 Numbering,
6、 naming and addressing Y.2300Y.2399 Network management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Y.2205 (09/2008) i Recommendation IT
7、U-T Y.2205 Next Generation Networks Emergency telecommunications Technical considerations Summary Recommendation ITU-T Y.2205 specifies technical considerations that may be applied within the next generation network (NGN) to enable emergency telecommunications (ET). In addition, this Recommendation
8、also outlines the underlying technical principles involved in supporting emergency telecommunications. Source Recommendation ITU-T Y.2205 was approved on 12 September 2008 by ITU-T Study Group 13 (2005-2008) under the WTSA Resolution 1 procedure. Keywords Architecture, early warning (EW), emergency
9、telecommunications service (ETS), emergency telecommunications, NGN, priority telecommunications, QoS, telecommunications for disaster relief (TDR). ii Rec. ITU-T Y.2205 (09/2008) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of teleco
10、mmunications, 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 telecomm
11、unications 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 proc
12、edure 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 tele
13、communication 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 the
14、se 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
15、 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 position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU membe
16、rs or 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
17、 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. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Y.2205
18、(09/2008) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 3 4 Abbreviations and acronyms 3 5 Emergency telecommunications (ET) and early warning description 4 5.1 General . 4 5.2 Emergency telecommunications. 5 5.3 Early warning . 5 6 General considerations for emergency telecommunications
19、 and early warning 6 7 General functional requirements and capabilities. 6 7.1 Emergency telecommunications. 7 7.2 Early warning . 7 8 Mechanisms and capabilities supporting emergency telecommunications in NGN 8 8.1 General . 8 8.2 Service stratum . 11 8.3 Transport stratum 13 8.4 NGN access 14 9 Me
20、chanisms and capabilities supporting some aspects of early warning in NGN. 16 9.1 General . 16 9.2 Common alerting protocol (CAP) 16 10 Service restoration priority . 17 11 Security. 17 Appendix I Emergency telecommunications categories. 19 I.1 Individual-to-authority emergency telecommunications 19
21、 I.2 Individual-to-individual emergency telecommunications 19 I.3 Authority-to-authority emergency telecommunications. 19 I.4 Authority-to-individual emergency telecommunications. 20 Appendix II Example use cases for early warning alert systems 21 II.1 Push model . 21 II.2 Pull model. 21 Bibliograph
22、y. 22 iv Rec. ITU-T Y.2205 (09/2008) Introduction ITU-T Y.1271 provides the network requirements and capabilities for emergency telecommunications (ET). The realization of priority telecommunications based upon those requirements, as exemplified by authorities coordinating disaster relief using publ
23、ic networks, may result in the creation of new mechanisms and interworking/reuse of existing mechanisms. Emergency telecommunications should be given preferential treatment over regular public network services. Prioritized telecommunications used in emergency situations are not new; circuit-switched
24、 networks have supported such systems for years, primarily for voice calls (e.g., ITU-T E.106). However, the technical methods used to support these underlying requirements for emergency telecommunications in the NGN environment are evolving. Traditional circuit switched priority methods do not nece
25、ssarily apply in NGN due to inherent differences in circuit-switched versus packet-switched telecommunication. ITU-T Y.1271 outlines the requirements and capabilities in general and abstract terms. ITU-T Y.1271 is technology neutral. Since NGN is based on packet-switched technology, which is fundame
26、ntally different from circuit-switched technology, there is a need to consider the technical issues and potential solutions that could be used to effect the realization of emergency telecommunications capabilities in NGN. This Recommendation specifies technical considerations that may be applied wit
27、hin NGN to enable emergency telecommunications and the underlying principles involved. Rec. ITU-T Y.2205 (09/2008) 1 Recommendation ITU-T Y.2205 Next Generation Networks Emergency telecommunications Technical considerations 1 Scope This Recommendation specifies technical considerations that may be a
28、pplied within the next generation network (NGN) to enable emergency telecommunications (ET). In addition, this Recommendation also outlines the underlying technical principles involved in supporting ET. It specifies requirements and capabilities for ET beyond the ones specified in ITU-T Y.2201 in th
29、e context of NGN (as defined in ITU-T Y.2001 and further outlined in ITU-T Y.2011). Emergency telecommunications (including support of some aspects of early warning (see Figure 1) include: individual-to-authority emergency telecommunications, e.g., calls to emergency service providers; authority-to-
30、authority emergency telecommunications; authority-to-individual emergency telecommunications, e.g., community notification services. Appendix I provides additional information for the above listed ET categories. Some requirements and capabilities for early warning are also specified. Individual-to-a
31、uthority emergency telecommunications capabilities are not addressed and are outside the scope of this Recommendation. Some of the technical means described herein could also be used for individual-to-authority or individual-to-individual emergency telecommunications; however, these categories are n
32、ot addressed in this Recommendation. 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 publication, the editions indicated were valid. All Recommendations and ot
33、her 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 the currently valid ITU-T Recommendations is regularly published. The r
34、eference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T E.106 Recommendation ITU-T E.106 (2003), International Emergency Preference Scheme (IEPS) for disaster relief operations. ITU-T E.107 Recommendation ITU-T E.107 (2007)
35、, Emergency Telecommunications Service (ETS) and interconnection framework for national implementations of ETS. ITU-T H.248.1 Recommendation ITU-T H.248.1 (2005), Gateway control protocol: Version 3. ITU-T H.323 Recommendation ITU-T H.323 (2006), Packet-based multimedia communications systems. ITU-T
36、 H.460.4 Recommendation ITU-T H.460.4 (2007), Call priority designation and country/international network of call origination identification for H.323 priority calls. 2 Rec. ITU-T Y.2205 (09/2008) ITU-T J.260 Recommendation ITU-T J.260 (2005), Requirements for preferential telecommunications over IP
37、Cablecom networks. ITU-T X.805 Recommendation ITU-T X.805 (2003), Security architecture for systems providing end-to-end communications. ITU-T X.1303 Recommendation ITU-T X.1303 (2007), Common alerting protocol (CAP 1.1). ITU-T Y.110 Recommendation ITU-T Y.110 (1998), Global Information Infrastructu
38、re principles and framework architecture. ITU-T Y.1271 Recommendation ITU-T Y.1271 (2004), Framework(s) on network requirements and capabilities to support emergency telecommunications over evolving circuit-switched and packet-switched networks. ITU-T Y.1541 Recommendation ITU-T Y.1541 (2006), Netwo
39、rk performance objectives for IP-based services. ITU-T Y.2001 Recommendation ITU-T Y.2001 (2004), General overview of NGN. ITU-T Y.2011 Recommendation ITU-T Y.2011 (2004), General principles and general reference model for Next Generation Networks. ITU-T Y.2012 Recommendation ITU-T Y.2012 (2006), Fu
40、nctional requirements and architecture of the NGN release 1. ITU-T Y.2111 Recommendation ITU-T Y.2111 (2008), Resource and admission control functions in next generation networks. ITU-T Y.2171 Recommendation ITU-T Y.2171 (2006), Admission control priority levels in Next Generation Networks. ITU-T Y.
41、2172 Recommendation ITU-T Y.2172 (2007), Service restoration priority levels in Next Generation Networks. ITU-T Y.2201 Recommendation ITU-T Y.2201 (2007), NGN release 1 requirements. ITU-T Y.2701 Recommendation ITU-T Y.2701 (2007), Security requirements for NGN release 1. IETF RFC 2205 IETF RFC 2205
42、 (1997), Resource ReSerVation Protocol (RSVP) Version 1 Functional Specification. IETF RFC 3246 IETF RFC 3246 (2002), An Expedited Forwarding PHB (Per-Hop Behavior). IETF RFC 3261 IETF RFC 3261 (2002), SIP: Session Initiation Protocol. IETF RFC 3312 IETF RFC 3312 (2002), Integration of Resource Mana
43、gement and Session Initiation Protocol (SIP). IETF RFC 4412 IETF RFC 4412 (2006), Communications Resource Priority for the Session Initiation Protocol (SIP). IETF RFC 4542 IETF RFC 4542 (2006), Implementing an Emergency Telecommunications Service (ETS) for Real-Time Services in the Internet Protocol
44、 Suite. IETF RFC 4594 IETF RFC 4594 (2006), Configuration Guidelines for DiffServ Service Classes. Rec. ITU-T Y.2205 (09/2008) 3 3 Definitions This Recommendation uses definitions from: ITU-T Y.1271, ITU-T Y.2001, ITU-T Y.2011 and ITU-T Y.2201. 3.1 emergency telecommunications (ET): ET means any eme
45、rgency related service that requires special handling from the NGN relative to other services. This includes government authorized emergency services and public safety services. 3.2 emergency telecommunications service (ETS): ITU-T E.107 A national service, providing priority telecommunications to t
46、he ETS authorized users in times of disaster and emergencies. 3.3 next generation network (NGN): ITU-T Y.2001 A packet-based network able to provide telecommunication services and able to make use of multiple broadband, QoS-enabled transport technologies and in which service-related functions are in
47、dependent from underlying transport-related technologies. It enables unfettered access for users to networks and to competing service providers and/or services of their choice. It supports generalized mobility which will allow consistent and ubiquitous provision of services to users. 3.4 telecommuni
48、cations for disaster relief (TDR): TDR is an international and national telecommunications capability for purposes of disaster relief. It can make use of international permanent, shared network facilities already in place and operational, temporary network facilities that are provisioned specificall
49、y for TDR, or a suitable combination of the two. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations: ASN.1 Abstract Syntax Notation One CAC Call Admission Control CAP Common Alerting Protocol DoS Denial of Service DSCP Differentiated Services Code Point EAS Emergency Alert System EF Expedited Forwarding ENI ETS National Implementation ET Emergency Telecommunications ETS Emergency Telecommunications Service EW Early Warning IEPS In
