Internet Engineering Task Force (IETF) C. Holmberg
Request for Comments: 7913 Ericsson
Updates: 7315 June 2016
Category: Informational
ISSN: 2070-1721
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
P-Access-Network-Info ABNF更新
Abstract
摘要
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.
本文档通过修改P-access-Network-info报头字段扩展的Backus Naur表单（ABNF）的扩展访问信息部分，并通过将以下“访问信息”报头字段参数值添加到ABNF中的“访问信息”报头字段参数值列表来更新RFC 7315：“特定于操作员的GI”和“utran-sai-3gpp”。这些值在ABNF中定义，但不包括在列表中。
Status of This Memo
关于下段备忘
This document is not an Internet Standards Track specification; it is published for informational purposes.
本文件不是互联网标准跟踪规范；它是为了提供信息而发布的。
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.
本文件是互联网工程任务组（IETF）的产品。它代表了IETF社区的共识。它已经接受了公众审查，并已被互联网工程指导小组（IESG）批准出版。并非IESG批准的所有文件都适用于任何级别的互联网标准；见RFC 7841第2节。
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.
有关本文件当前状态、任何勘误表以及如何提供反馈的信息，请访问http://www.rfc-editor.org/info/rfc7913.
Copyright Notice
版权公告
Copyright (c) 2016 IETF Trust and the persons identified as the document authors. All rights reserved.
版权所有（c）2016 IETF信托基金和确定为文件作者的人员。版权所有。
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.
本文件受BCP 78和IETF信托有关IETF文件的法律规定的约束(http://trustee.ietf.org/license-info)自本文件出版之日起生效。请仔细阅读这些文件，因为它们描述了您对本文件的权利和限制。从本文件中提取的代码组件必须包括信托法律条款第4.e节中所述的简化BSD许可证文本，并提供简化BSD许可证中所述的无担保。
Table of Contents
目录
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 . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Update to RFC 7315 . . . . . . . . . . . . . . . . . . . . . 3
3. Security Considerations . . . . . . . . . . . . . . . . . . . 3
4. Normative References . . . . . . . . . . . . . . . . . . . . 4
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 4
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 4
[RFC7315] defines the Session Initiation Protocol (SIP) [RFC3261] P-Access-Network-Info header field.
[RFC7315]定义会话启动协议（SIP）[RFC3261]P-Access-Network-Info头字段。
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.
标头字段语法包含一个“access info”标头字段参数，带有一组预定义值。大多数预定义值遵循“通用参数”规则[RFC3261]。然而，目前[RFC7315]中的扩充巴科斯诺尔形式（ABNF）[RFC5234]要求新值遵循“生成值”规则[RFC3261]，该规则比“通用参数”更具限制性。限制没有理由，并且已经按照“通用参数”规则定义了新值。
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.
ABNF还定义了以下“访问信息”标题字段参数值：“特定于运营商的GI”和“utran-sai-3gpp”。但是，这些值不包括在“访问信息”值列表中。
This document updates Section 5.4 of [RFC7315], by modifying the extension-access-info part of the P-Access-Network-Info header field ABNF.
本文件通过修改P-access-Network-info标题字段ABNF的扩展访问信息部分，更新了[RFC7315]第5.4节。
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.
由于P-Access-Network-Info报头字段主要用于第三代合作伙伴关系项目（3GPP）定义的网络，其中定义了遵循“通用参数”规则的新值[TS.3GPP.24.229]，因此不认为更新会导致向后兼容性问题。
This section updates the ABNF defined in Section 5.4 of RFC 7315, as described below:
本节更新RFC 7315第5.4节中定义的ABNF，如下所述：
Old syntax:
旧语法：
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
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:
新语法：
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
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
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.
[RFC7315]中定义了P-Access-Network-Info报头字段的安全注意事项。本文档中定义的ABNF更新不影响安全注意事项。
[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>.
[RFC3261]Rosenberg，J.，Schulzrinne，H.，Camarillo，G.，Johnston，A.，Peterson，J.，Sparks，R.，Handley，M.，和E.Schooler，“SIP：会话启动协议”，RFC 3261，DOI 10.17487/RFC3261，2002年6月<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>.
[RFC5234]Crocker，D.，Ed.和P.Overell，“语法规范的扩充BNF:ABNF”，STD 68，RFC 5234，DOI 10.17487/RFC5234，2008年1月<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>.
[RFC7315]Jesske，R.，Drage，K.，和C.Holmberg，“3GPP会话启动协议（SIP）的专用头（P头）扩展”，RFC 7315，DOI 10.17487/RFC7315，2014年7月<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>.
[TS.3GPP.24.229]3GPP，“基于会话发起协议（SIP）和会话描述协议（SDP）的IP多媒体呼叫控制协议；第3阶段”，3GPP TS 24.229 13.5.11916年3月<http://www.3gpp.org/ftp/Specs/html-info/24229.htm>.
Acknowledgments
致谢
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.
感谢Ben Campbell、Cullen Jennings、Gonzalo Salgueiro、Jean Mahoney、Menachem Dodge、Olafur Gudmundsson、Paul Kyzivat和3GPP社区对该文档提供指导、输入和评论。
Author's Address
作者地址
Christer Holmberg Ericsson Hirsalantie 11 Jorvas 02420 Finland
Christer Holmberg Ericsson Hirsalantie 11 Jorvas 02420芬兰
Email: christer.holmberg@ericsson.com
Email: christer.holmberg@ericsson.com