Manet H.R. Rogge Internet-Draft Fraunhofer FKIE Intended status: Standards Track 23 July 2023 Expires: 24 January 2024 DLEP Radio Band Extension draft-rogge-manet-dlep-radio-band-04 Abstract This document defines an extension to the Dynamic Link Exchange Protocol (DLEP) to provide the frequency bands used by the radio. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on 24 January 2024. Copyright Notice Copyright (c) 2023 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 (https://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 Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Rogge Expires 24 January 2024 [Page 1] Internet-Draft DLEP Radio Band Extension July 2023 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 2 2. Extension Usage and Identification . . . . . . . . . . . . . 2 3. Radio Band Data Item . . . . . . . . . . . . . . . . . . . . 2 4. Security Considerations . . . . . . . . . . . . . . . . . . . 4 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 5.1. Extension Type Value . . . . . . . . . . . . . . . . . . 4 5.2. Data Item Value . . . . . . . . . . . . . . . . . . . . . 5 6. Normative References . . . . . . . . . . . . . . . . . . . . 5 7. Informative References . . . . . . . . . . . . . . . . . . . 5 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 5 1. Introduction The dynamic Link Exchange Protocol (DLEP) is defined in [RFC8175]. It provides the exchange of link-related control information between DLEP peers. DLEP peers are comprised of a modem and a router. DLEP defines a base set of mechanisms as well as support for possible extensions. This document defines one such extension. 1.1. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. 2. Extension Usage and Identification The use of the Radio Band Extension SHOULD be configurable. To indicate that the Radio Band Extension is to be used, an implementation MUST include the Radio Band Extension Type Value in the Extensions Supported Data Item. The Extensions Supported Data Item is sent and processed according to [RFC8175]. The Radio Band Extension Type Value is TBD; see Section TBD. 3. Radio Band Data Item Radio Band Data Item contains information which radio frequency resources are being used. These values are usually interface specific and static during the DLEP session. The Radio Band Data Item can be used multiple times to represent multiple radio bands. Rogge Expires 24 January 2024 [Page 2] Internet-Draft DLEP Radio Band Extension July 2023 The Item can be used in a neighbor specific message if the radio use dedicated subcarriers to talk to neighbors. Frequency selection is often controlled by the radios configuration. By giving the radio a standardized way to transmit its selected frequency configuration the router can aggregate multiple radios settings into a common information page, can do some basic checking for configuration mistakes by comparing known radio group configuration with their frequency by radio (if the routers have a second communication channel) or forward the data to an upper layer for visualization. The information in this Item gives the router an easy way to calculate the spectral efficiency of a radio link, how much bandwidth is used for the current data-rate reported by DLEP. This can be integrated into the routing metric to focus traffic on links that use the spectrum efficiently. The Item can also be used as an interface to a cognitive radio controller on the router, analyzing the correlation of transmission disruptions with the frequency bands and could (together with the Request Link Characteristics message) be used to change the frequency of the radio in a standardized way. The format of the Radio Band Data Item is: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Data Item Type | Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Carrier Frequency | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Carrier Frequency | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Bandwidth | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Bandwidth | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Flags | +-+-+-+-+-+-+-+-+ Figure 1 Data Item Type: TBD Length: 17 Rogge Expires 24 January 2024 [Page 3] Internet-Draft DLEP Radio Band Extension July 2023 Center Frequency: The center frequency of the band in Hz. Bandwidth: The bandwidth of the band in Hz. Flags: Flags field as defined below. The Flags field is defined as: 0 1 2 3 4 5 6 7 +-+-+-+-+-+-+-+-+ | Reserved |U|D| +-+-+-+-+-+-+-+-+ Figure 2 U: Uplink Flag, indicating the band is used for transmitting data. D: Downlink Flag, indicating the band is used for receiving data. Reserved: MUST be zero. Left for future assignment. 4. Security Considerations The extension introduces a new Data Item for DLEP. The extension does not inherently introduce any additional vulnerabilities above those documented in [RFC8175]. The approach taken to security in that document applies equally when running the extension defined in this document. 5. IANA Considerations As described below, IANA has assigned two values per this document. Both assignments are to registries defined by [RFC8175]. 5.1. Extension Type Value IANA has assigned the following value in the "Extension Type Values" registry within the "Dynamic Link Exchange Protocol (DLEP) Parameters" registry. The new value is in the range with the "Specification Required" [RFC8126] policy: Rogge Expires 24 January 2024 [Page 4] Internet-Draft DLEP Radio Band Extension July 2023 +------+-------------+ | Code | Description | +------+-------------+ | TBD | Radio Band | +------+-------------+ Table 1: New Extension Type Value 5.2. Data Item Value IANA has assigned the following value in the "Data Item Type Values" registry within the "Dynamic Link Exchange Protocol (DLEP) Parameters" registry. The new value is in the range with the "Specification Required" [RFC8126] policy: +-----------+-------------+ | Type Code | Description | +-----------+-------------+ | TBD | Radio Band | +-----------+-------------+ Table 2: New Data Item Value 6. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC8175] Ratliff, S., Jury, S., Satterwhite, D., Taylor, R., and B. Berry, "Dynamic Link Exchange Protocol (DLEP)", RFC 8175, DOI 10.17487/RFC8175, June 2017, . 7. Informative References [RFC8126] Cotton, M., Leiba, B., and T. Narten, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 8126, DOI 10.17487/RFC8126, June 2017, . Author's Address Rogge Expires 24 January 2024 [Page 5] Internet-Draft DLEP Radio Band Extension July 2023 Henning Rogge Fraunhofer FKIE Fraunhofer Strasse 20 53343 Wachtberg Germany Email: henning.rogge@fkie.fraunhofer.de Rogge Expires 24 January 2024 [Page 6]