ISO IEC TR 16167-2011 Information technology - Telecommunications and information exchange between systems - Next Generation Corporate Networks (NGCN) - Emergen.pdf
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1、 Reference number ISO/IEC TR 16167:2011(E) ISO/IEC 2011TECHNICAL REPORT ISO/IEC TR 16167 Second edition 2011-09-01Information technology Telecommunications and information exchange between systems Next Generation Corporate Networks (NGCN) Emergency calls Technologies de linformation Tlinformatique R
2、seaux dentreprise de prochaine gnration (NGCN) Appels durgence ISO/IEC TR 16167:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, includin
3、g photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published
4、in Switzerland ii ISO/IEC 2011 All rights reservedISO/IEC TR 16167:2011(E) ISO/IEC 2011 All rights reserved iiiContents Page Foreword iv Introduction . v 1 Scope 1 2 Normative references 2 3 Terms and definitions . 2 3.1 External definitions . 2 3.2 Other definitions 2 4 Abbreviations . 3 5 Backgrou
5、nd 5 6 Technical aspects of emergency calls in enterprise networks 8 6.1 Identifying a call as an emergency call . 8 6.1.1 User actions . 8 6.1.2 Signalling impact . 10 6.1.3 Unauthenticated access . 12 6.2 Obtaining and delivering the location of the caller 12 6.2.1 Format of location information 1
6、3 6.2.2 Obtaining location information for delivery 13 6.2.3 Location conveyance in SIP . 18 6.3 Routing an emergency call to the appropriate SAP 18 6.3.1 Routing by the calling device . 19 6.3.2 Routing by enterprise SIP intermediary 20 6.4 Delivering information to the SAP to allow a return call o
7、r verification call to be made . 21 6.4.1 Delivery of caller identification 21 6.4.2 Delivery of device identification 21 6.4.3 Identifying a return call or verification call . 22 6.5 Ensuring appropriate resources are available for an emergency call, return call or verification call 22 6.6 Ensuring
8、 appropriate media quality during an emergency call . 23 6.7 Security considerations 24 6.8 Other aspects . 25 6.8.1 Hosted users 25 6.8.2 Guest users 25 7 NGN considerations 25 8 Device considerations 27 9 Alternatives for roaming mobile and nomadic users 28 9.1 Establishing an emergency call when
9、already signalling via a visited public network . 28 9.2 Establishing an emergency call via a visited public network when other traffic is signalled directly via the enterprise network 29 9.3 Establishing an emergency call directly to a PSAP . 29 10 Enterprise responsibilities . 29 11 Summary of req
10、uirements and standardisation gaps . 30 11.1 Requirements on NGNs 30 11.2 Recommendations on enterprise networks . 30 11.3 Standardisation gaps 31 Bibliography 32 ISO/IEC TR 16167:2011(E) iv ISO/IEC 2011 All rights reservedForeword ISO (the International Organization for Standardization) and IEC (th
11、e International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with partic
12、ular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have establ
13、ished a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technic
14、al committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. In exceptional circumstances, when the joint technical committee has collected data of a different kind from that which is nor
15、mally published as an International Standard (“state of the art”, for example), it may decide to publish a Technical Report. A Technical Report is entirely informative in nature and shall be subject to review every five years in the same manner as an International Standard. Attention is drawn to the
16、 possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC TR 16167 was prepared by Ecma International (as ECMA TR/101) and was adopted, under a special “fast-track proc
17、edure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval by national bodies of ISO and IEC. This second edition cancels and replaces the first edition (ISO/IEC TR 16167:2010), which has been technically revised. This second edition makes a distinction
18、 between an answering point and an emergency control centre and clarifies a few other points, in particular to do with interaction with (public) Next Generation Networks. ISO/IEC TR 16167:2011(E) ISO/IEC 2011 All rights reserved vIntroduction This Technical Report is one of a series of publications
19、that provides an overview of IP-based enterprise communication involving Corporate telecommunication Networks (CNs) (also known as enterprise networks) and in particular Next Generation Corporate Networks (NGCN). The series particularly focuses on session level communication based on the Session Ini
20、tiation Protocol (SIP) 5, with an emphasis on inter-domain communication. This includes communication between parts of the same enterprise (on dedicated infrastructures and/or hosted), between enterprises and between enterprises and public networks. Particular consideration is given to Next Generati
21、on Networks (NGN) as public networks and as providers of hosted enterprise capabilities. Key technical issues are investigated, current standardisation work and gaps in this area are identified, and a number of requirements are stated. Among other uses, this series of publications can act as a refer
22、ence for other standardisation bodies working in this field. Various regional and national bodies address emergency communications, mainly with an emphasis on public telecommunications. In particular, in the United States work is carried out by the National Emergency Number Association (NENA). In Eu
23、rope, ETSI EMTEL (Special Committee on Emergency Communications) plays a coordinating role, liaising with external bodies (e.g., in the European Commission, CEPT, CEN and CENELEC) as well as overseeing work done by other ETSI Technical Bodies (e.g., TISPAN). This Technical Report focuses on emergenc
24、y calls as they impact enterprise networks, and therefore is intended to complement the work of those other bodies. This Technical Report is based upon the practical experience of Ecma member companies and the results of their active and continuous participation in the work of ISO/IEC JTC 1, ITU-T,
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