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Versions: 00 01 02                                                      
Manet                                                         H.R. Rogge
Internet-Draft                                           Fraunhofer FKIE
Intended status: Standards Track                           11 March 2021
Expires: 12 September 2021


                       DLEP Radio Band Extension
                  draft-rogge-manet-dlep-radio-band-02

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
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   This Internet-Draft will expire on 12 September 2021.

Copyright Notice

   Copyright (c) 2021 IETF Trust and the persons identified as the
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   This document is subject to BCP 78 and the IETF Trust's Legal
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   Please review these documents carefully, as they describe your rights
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   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.







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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 . . . . . . . . . . . . . . . . . . . . .   4
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   4
   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.





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   The Item can be used in a neighbor specific message if the radio use
   dedicated subcarriers to talk to neighbors.

   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

   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.




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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:

                           +------+-------------+
                           | 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





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   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [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,
              <https://www.rfc-editor.org/info/rfc8175>.

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,
              <https://www.rfc-editor.org/info/rfc8126>.

Author's Address

   Henning Rogge
   Fraunhofer FKIE
   Fraunhofer Strasse 20
   53343 Wachtberg
   Germany

   Email: henning.rogge@fkie.fraunhofer.de

























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