URI Schemes for Broadcast Radio Services
draft-humfrey-radio-scheme-latest

Abstract

This document describes Uniform Resource Identifier schemes which enable representations of broadcast radio services.

Note to Readers

Source for this draft and an issue tracker can be found at https://github.com/bbc/draft-humfrey-radio-scheme.

Status of This Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

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This Internet-Draft will expire on June 13, 2020.

Copyright Notice

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Table of Contents

• 1. Introduction
• 1.1. Notational Conventions
• 2. Scheme Syntax
• 2.1. The AM Signalling System (AMSS) Scheme
• 2.2. The Digital Audio Broadcasting (DAB) Scheme
• 2.3. The Digital Radio Mondiale (DRM) Scheme
• 2.4. The VHF/FM URI Scheme
• 3. IANA Considerations
• 4. Security Considerations
• 5. References
• 5.1. Normative References
• 5.2. Informative References
• Author's Address

1. Introduction

1.1. Notational Conventions

The key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “NOT RECOMMENDED”, “MAY”, and “OPTIONAL” in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.

This document uses the Augmented Backus-Naur Form (ABNF) notation of [RFC5234].

2. Scheme Syntax

broadcast-radio-uri = amss-uri / dab-uri / drm-uri / fm-uri
prefix-delimiter = ":"
gcc    = 3HEXDIG
uatype = 3HEXDIG

gcc:

The Global Country Code of the country of origin of the service, which is calculated as described in Annex A of [ETSI.TS.103.270]

uatype:

The user application of the data component, used to identify the user application which should be used to decode the data indicated by the service-id and scids. List of valid user application types is defined in [ETSI.TS.101.756] Section 5.10.

2.1. The AM Signalling System (AMSS) Scheme

AM Signalling System [ETSI.TS.102.386] URI scheme comprises only of the Service Identifier.

amss-uri    = amss-prefix amss-sid
amss-prefix = "amss" prefix-delimiter
amss-sid    = 6HEXDIG

amss-sid:

The Service Identifier of the service

2.2. The Digital Audio Broadcasting (DAB) Scheme

dab-uri    = dab-prefix gcc "."  eid "." dab-sid "." scids [ "." uatype ]
dab-prefix = "dab" prefix-delimiter
dab-sid    = 4HEXDIG / 8HEXDIG
eid        = 4HEXDIG
scids      = 1HEXDIG

eid:

The Ensemble Identifier of the service

scids:

The Service Component Identifier with the Service

2.3. The Digital Radio Mondiale (DRM) Scheme

drm-uri    = drm-prefix drm-sid [ "." appdomain "." uatype ]
drm-prefix = "drm" prefix-delimiter
drm-sid    = 6HEXDIG
appdomain  = 1HEXDIG

appdomain:

The application domain of the data component

drm-sid:

The Service Identifier of the service

2.4. The VHF/FM URI Scheme

fm-uri    = fm-prefix gcc "." pi "." frequency
fm-prefix = "fm" prefix-delimiter
pi        = 4HEXDIG
frequency = 5DIGIT / "*"

pi:

Received RDS/RBDS Programme Identification (PI) code

frequency:

Frequency on which the broadcast is received, formatted to 5 characters in units of 100 KHz. Frequencies below 100 MHz MUST include a leading zero, for example 90.2 MHz would be represented as “09020”.

3. IANA Considerations

This document kindly requests the following existing URI Schemes be updated so their references now refer to this document:

• amss
• dab
• drm
• fm

4. Security Considerations

There are no security considerations.

5. References

5.1. Normative References

5.2. Informative References

Author's Address