GENWiki

Premier IT Outsourcing and Support Services within the UK

User Tools

Site Tools


rfc:rfc7913

Internet Engineering Task Force (IETF) C. Holmberg Request for Comments: 7913 Ericsson Updates: 7315 June 2016 Category: Informational ISSN: 2070-1721

                 P-Access-Network-Info ABNF Update

Abstract

 This document updates RFC 7315, by modifying the extension-access-
 info part of the P-Access-Network-Info header field Augmented Backus-
 Naur Form (ABNF), and by adding the following 'access-info' header
 field parameter values to the list of 'access-info' header field
 parameter values in the ABNF: 'operator-specific-GI' and
 'utran-sai-3gpp'.  The values are defined in the ABNF but are not
 included in the list.

Status of This Memo

 This document is not an Internet Standards Track specification; it is
 published for informational purposes.
 This document is a product of the Internet Engineering Task Force
 (IETF).  It represents the consensus of the IETF community.  It has
 received public review and has been approved for publication by the
 Internet Engineering Steering Group (IESG).  Not all documents
 approved by the IESG are a candidate for any level of Internet
 Standard; see Section 2 of RFC 7841.
 Information about the current status of this document, any errata,
 and how to provide feedback on it may be obtained at
 http://www.rfc-editor.org/info/rfc7913.

Holmberg Informational [Page 1] RFC 7913 PANI ABNF June 2016

Copyright Notice

 Copyright (c) 2016 IETF Trust and the persons identified as the
 document authors.  All rights reserved.
 This document is subject to BCP 78 and the IETF Trust's Legal
 Provisions Relating to IETF Documents
 (http://trustee.ietf.org/license-info) in effect on the date of
 publication of this document.  Please review these documents
 carefully, as they describe your rights and restrictions with respect
 to this document.  Code Components extracted from this document must
 include Simplified BSD License text as described in Section 4.e of
 the Trust Legal Provisions and are provided without warranty as
 described in the Simplified BSD License.

Table of Contents

 1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
 2.  Update to RFC 7315  . . . . . . . . . . . . . . . . . . . . .   3
 3.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
 4.  Normative References  . . . . . . . . . . . . . . . . . . . .   4
 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .   4
 Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   4

1. Introduction

 [RFC7315] defines the Session Initiation Protocol (SIP) [RFC3261]
 P-Access-Network-Info header field.
 The header field syntax contains an 'access-info' header field
 parameter, with a set of pre-defined values.  Most pre-defined values
 follow the 'generic-param' rule [RFC3261].  However, currently the
 Augmented Backus-Naur Form (ABNF) [RFC5234] in [RFC7315] requires new
 values to follow the 'gen-value' rule [RFC3261], which is more
 restrictive than 'generic-param'.  There is no justification for the
 restriction, and new values have already been defined following the
 'generic-param' rule.
 The ABNF also defines the following 'access-info' header field
 parameter values: 'operator-specific-GI' and 'utran-sai-3gpp'.
 However, the values are not included in the list of 'access-info'
 values.
 This document updates Section 5.4 of [RFC7315], by modifying the
 extension-access-info part of the P-Access-Network-Info header field
 ABNF.

Holmberg Informational [Page 2] RFC 7913 PANI ABNF June 2016

 As the P-Access-Network-Info header field is mainly used in networks
 defined by the 3rd-Generation Partnership Project (3GPP), where new
 values following the 'generic-param' rule have been defined
 [TS.3GPP.24.229], the update is not considered to cause issues with
 backward compatibility.

2. Update to RFC 7315

 This section updates the ABNF defined in Section 5.4 of RFC 7315, as
 described below:
Old syntax:
    access-info            = cgi-3gpp / utran-cell-id-3gpp /
                             dsl-location / i-wlan-node-id /
                             ci-3gpp2 / eth-location /
                             ci-3gpp2-femto / fiber-location /
                             np / gstn-location /local-time-zone /
                             dvb-rcs2-node-id / extension-access-info
    np                     = "network-provided"
    extension-access-info  = gen-value
New syntax:
    access-info            = cgi-3gpp / utran-cell-id-3gpp /
                             dsl-location / i-wlan-node-id /
                             ci-3gpp2 / eth-location /
                             ci-3gpp2-femto / fiber-location /
                             np / gstn-location /local-time-zone /
                             dvb-rcs2-node-id / operator-specific-GI /
                             utran-sai-3gpp / extension-access-info
    np                     = "network-provided"
    extension-access-info  = generic-param

3. Security Considerations

 The security considerations for the P-Access-Network-Info header
 field are defined in [RFC7315].  The ABNF update defined in this
 document does not impact the security considerations.

Holmberg Informational [Page 3] RFC 7913 PANI ABNF June 2016

4. Normative References

 [RFC3261]  Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston,
            A., Peterson, J., Sparks, R., Handley, M., and E.
            Schooler, "SIP: Session Initiation Protocol", RFC 3261,
            DOI 10.17487/RFC3261, June 2002,
            <http://www.rfc-editor.org/info/rfc3261>.
 [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
            Specifications: ABNF", STD 68, RFC 5234,
            DOI 10.17487/RFC5234, January 2008,
            <http://www.rfc-editor.org/info/rfc5234>.
 [RFC7315]  Jesske, R., Drage, K., and C. Holmberg, "Private Header
            (P-Header) Extensions to the Session Initiation Protocol
            (SIP) for the 3GPP", RFC 7315, DOI 10.17487/RFC7315, July
            2014, <http://www.rfc-editor.org/info/rfc7315>.
 [TS.3GPP.24.229]
            3GPP, "IP multimedia call control protocol based on
            Session Initiation Protocol (SIP) and Session Description
            Protocol (SDP); Stage 3", 3GPP TS 24.229 13.5.1, March
            2016, <http://www.3gpp.org/ftp/Specs/html-info/24229.htm>.

Acknowledgments

 Thanks to Ben Campbell, Cullen Jennings, Gonzalo Salgueiro, Jean
 Mahoney, Menachem Dodge, Olafur Gudmundsson, Paul Kyzivat, and the
 3GPP community for providing guidance, input, and comments on the
 document.

Author's Address

 Christer Holmberg
 Ericsson
 Hirsalantie 11
 Jorvas  02420
 Finland
 Email: christer.holmberg@ericsson.com

Holmberg Informational [Page 4]

/data/webs/external/dokuwiki/data/pages/rfc/rfc7913.txt · Last modified: 2016/06/22 22:26 by 127.0.0.1

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki