ISO 24103:2009
(Main)Intelligent transport systems — Communications access for land mobiles (CALM) — Media adapted interface layer (MAIL)
Intelligent transport systems — Communications access for land mobiles (CALM) — Media adapted interface layer (MAIL)
ISO 24103:2009 determines the logical structure of using dedicated short-range communication (DSRC) with an OSI (open systems interconnection) application layer as a CALM medium for IP communications. DSRC to which MAIL is applicable are those with an application layer compliant with ISO 15628, and the standards of such DSRC include the following: ARIB STD-T75 DSRC (Japan); TTAS.KO-06.0025 DSRC in the 5,8 GHz band (Korea); EN 12253 DSRC physical layer using microwave in the 5,8 GHz band, EN 12795 DSRC data link layer and EN 12834 DSRC application layer (Europe).
Systèmes intelligents de transport — Accès aux communications des services mobiles terrestres (CALM) — Couche d'interface adaptée au milieu (MAIL)
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 24103
First edition
2009-06-01
Intelligent transport systems —
Communications access for land mobiles
(CALM) — Media adapted interface
layer (MAIL)
Systèmes intelligents de transport — Accès aux communications des
services mobiles terrestres (CALM) — Couche d'interface adaptée au
milieu (MAIL)
Reference number
©
ISO 2009
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ii © ISO 2009 – All rights reserved
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Conformance. 1
3 Normative references . 2
4 Terms and definitions. 2
5 Symbols and abbreviated terms . 2
6 Requirements . 4
6.1 Structure and operation . 4
6.2 Communication control method . 6
7 Extended link control protocol. 7
7.1 General. 7
7.2 Transmission service control. 8
7.3 Client/server communication control . 11
7.4 Communication control management . 13
8 Network control protocol . 15
8.1 General. 15
8.2 LAN control protocol. 16
8.3 Local port control protocol. 19
9 Adaptation . 19
Annex A (informative) ASN.1 definitions . 20
Annex B (informative) Relationship of primitives and protocol data units (PDU). 23
Bibliography . 24
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
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International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 24103 was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
iv © ISO 2009 – All rights reserved
Introduction
This International Standard is part of a family of International Standards for CALM (communication access for
land mobiles) which determine a common architecture, network protocols and air interface definitions for
wireless communications using cellular second generation, cellular third generation, mobile wireless
broadband, microwaves, millimetre waves, infra-red communications, and so on. Other air interfaces may be
added at a later date. These air interfaces are designed for providing parameters and protocols for broadcast,
point-point, vehicle-vehicle, and vehicle-point communications in the intelligent transport systems (ITS) sector.
This International Standard determines the media adapted interface layer (MAIL), which enables
communication media such as dedicated short-range communication (DSRC) compliant with ISO 15628
(DSRC application layer) to be used as CALM media for internet protocol (IP)-based communications.
DSRC media with the following characteristics are available.
⎯ Proven radio communication for ITS:
1) direct communication based on ISO 15628, e.g. for electronic fee collection (EFC) — in ARIB
STD-T75, a 4 MB/s data rate and a communication zone of approximately 30 m, available for
response during high-speed driving;
2) practical experiments for IP communication over the ISO 15628 application layer — a DSRC
application sub-layer (ARIB STD-T88) that works on application ID 18 of ISO 15628.
⎯ Communication in a comparatively small communication zone:
1) easy identification of a communication partner;
2) reuse frequency in every small zone and effective utilization of frequency resources;
3) less liable to be affected by shadowing.
INTERNATIONAL STANDARD ISO 24103:2009(E)
Intelligent transport systems — Communications access for
land mobiles (CALM) — Media adapted interface layer (MAIL)
1 Scope
This International Standard determines the logical structure of using dedicated short-range communication
(DSRC) with an OSI (open systems interconnection) application layer as a CALM medium for IP
communications. DSRC to which MAIL is applicable are those with an application layer compliant with
ISO 15628, and the standards of such DSRC include the following:
⎯ ARIB STD-T75 DSRC (Japan);
⎯ TTAS.KO-06.0025 DSRC in the 5,8 GHz band (Korea);
⎯ EN 12253 DSRC physical layer using microwave in the 5,8 GHz band, EN 12795 DSRC data link layer
and EN 12834 DSRC application layer (Europe).
Figure 1 shows the architecture of the MAIL, which can be considered as a specific extension of the
communication adaptation layer (CAL) specified by ISO 21218.
Applications
ISO 21210 CALM network layer
ISO 24103 CALM MAIL
DSRC with ISO 15628-
compliant L7
NOTE In furnishing additional information on CALM MAIL, reference can be made to ARIB STD-T88 (DSRC
application sub layer).
Figure 1 — CALM MAIL in CALM architecture
2 Conformance
In order for conformance to be claimed with this International Standard, communication shall be established in
full compliance with the procedures and protocols given in ISO 15628, compliant with the appropriate national
or regional standards, and shall be in accordance with ISO 21210, ISO 21217 and ISO 21218.
Management entity
ISO 21210 CME/NME
ISO 24102 IME
3 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 15628, Road transport and traffic telematics — Dedicated short range communication (DSRC) — DSRC
application layer
ISO 21210, Intelligent transport systems — Communications access for land mobiles (CALM) — Networking
1)
protocols
ISO 21217, Intelligent transport systems — Communications access for land mobiles (CALM) —
1)
Architecture
ISO 21218, Intelligent transport systems — Communications access for land mobiles (CALM) — Medium
service access points
ISO 24102, Intelligent transport systems — Communications access for land mobiles (CALM) — CALM
2)
Management
4 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
4.1
ISO 15628 DSRC
dedicated short-range communication system for ITS applications with an application layer as specified in
ISO 15628
4.2
base station
fixed DSRC equipment on the roadside, which performs communications with multiple mobile stations
4.3
media adapted interface layer
MAIL
functional structure for using DSRC as a CALM medium
4.4
mobile station
mobile communication facility capable of receiving and transmitting information from/to the base stations
5 Symbols and abbreviated terms
A-PDU application-layer protocol data unit
ARIB association of radio industries and businesses
A-SDU application-layer service data unit
ASN abstract syntax notation
1) To be published.
2) Under preparation.
2 © ISO 2009 – All rights reserved
CAL communication adaptation layer
CALM communications access for land mobiles
CI communication interface
CIMAE communication interface management adaptation entity
C-SAP communication SAP, as offered by the CAL to the CALM network layer
DHCP dynamic host configuration protocol
DL data link
DLL data link layer
DSRC dedicated short-range communication
EID element identifier
ELCP extended link control protocol
I-KE initialization kernel element
ind indication (service primitive type)
IP internet protocol
ITS intelligent transport systems
L7 layer 7 (application layer)
LAN local area network
LANCP LAN control protocol
LID link identifier
LPCP local port control protocol
L-PDU lower layer protocol data unit
MAC media access control
MAIL media adapted interface layer
ME management entity
MIB management information base
M-PDU media protocol data unit
MRU maximum receive unit
NCP network control protocol
OBU on-board unit
PDU protocol data unit
PHY-PDU physical layer protocol data unit
req request (service primitive type)
RSU road side unit
SAP service access point
SDU service data unit
TCP transmission control protocol
T-KE transfer kernel element
TTAS telecommunications technology association standard
U-PDU upper layer protocol data unit
6 Requirements
6.1 Structure and operation
The MAIL interfaces ISO 15628 DSRC application layer protocol stacks and CALM network protocols to
provide the DSRC with supplemental communications functions (see Figure 2).
The CALM MAIL communication interface (CI) shall be in accordance with
a) ISO 21218, for lower layer service access points,
b) ISO 24102, for interface management
c) ISO 21217, for global architecture, and
d) ISO 21210, for IP networking,
as restricted and/or amended by this International Standard.
This communication interface is a CALM wireless CI which shall
⎯ support CI class CIC-wl5,
⎯ support at least CI access class CIAC-1,
⎯ provide a C-SAP, and
⎯ provide an M-SAP,
all in accordance with ISO 21218.
CALM network layer
SAP
CAL
SAP
NCP/LANCP
ELCP
DSRC with ISO 15628-
compliant L7
CALM MAIL
Figure 2 — Medium adaptation
Figure 3 shows the structure of the core part of MAIL. The MAIL provides IP communications via DSRC to
CALM without requiring awareness of ISO 15628 protocol stacks. The functions that adapt the application
layer of the ISO 15628 DSRC to CALM are defined
...
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