ISO 15638-2:2013

INTERNATIONAL ISO
STANDARD 15638-2
First edition
2013-06-15
Intelligent transport systems —
Framework for collaborative Telematics
Applications for Regulated commercial
freight Vehicles (TARV) —
Part 2:
Common platform parameters using
CALM
Systèmes intelligents de transport — Cadre pour applications
télématiques collaboratives pour véhicules de fret commercial
réglementé (TARV) —
Partie 2: Paramètres de plate-forme commune utilisant CALM

Reference number
©
ISO 2013
©  ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any
means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission.
Permission can be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

Contents Page
Foreword . v
Introduction . vii
1  Scope . 1
2  Conformance . 1
3  Normative references . 1
4  Terms and definitions . 3
5  Symbols (and abbreviated terms) . 4
6  General overview and framework . 8
7.  Requirements . 10
7.1  General . 10
7.2  ISO 21217 CALM Architecture . 10
7.2.1  ISO 21217 General requirement . 10
7.2.2  ISO 21217 Specific aspects as they relate to TARV . 11
7.2.3  ISO 21217 Communication interface and channel types . 11
7.2.4  ISO 21217 Handover . 12
7.2.5  ISO 21217 IVS - ITS subsystem . 12
7.2.6  ISO 21217 Roadside ITS subsystem . 13
7.2.7  ISO 21217 Communication scenarios and classes . 14
7.3  ISO 21217 ITS-station reference architecture . 17
7.4  ISO 21217 Host, router, and gateway architecture . 19
7.5  ISO 21217 Service . 19
7.5.1  ISO 21217 ITS service . 19
7.5.2  ISO 21217 ITS-station service . 19
7.5.3  ISO 21217 Details related to the access layer . 19
7.5.4  ISO 21217 Details related to the networking and transport layer . 20
7.6  ISO 21217 Details related to ITS-station applications (ISO 21217) . 21
7.6.1  ISO 21217 CALM-aware applications . 21
7.6.2  ISO 21217 Non-CALM-aware applications . 22
7.7  ISO 21217 Management elements . 22
7.8  ISO 21210 CALM IPv6 Networking . 22
7.8.1  ISO 21210 General requirement . 22
7.8.2  ISO 21210 Requirements on all ITS IPv6 LAN nodes . 22
7.8.3  ISO 21210 ITS-station IPv6 nodes deployed in the Vehicle ITS sub-system . 23
7.8.4  ISO 21210 ITS-station IPv6 nodes deployed in the roadside ITS sub-system . 23
7.8.5  ISO 21210 ITS-station IPv6 nodes deployed in the central ITS sub-system . 24
7.8.6  ISO 21210 IPv6 functional modules . 24
7.8.7  ISO 21210 Module 5: IPv6 security . 26
7.8.8  ISO 21210 Modules implemented in ITS-station IPv6 nodes . 26
7.8.9  ISO 21210 IPv6 address configuration . 27
7.8.10  ISO 21210 Addressing requirement for reachability from the Internet . 29
7.8.11  ISO 21210 Optional features and functions . 29
7.8.12  ISO 21210 IPv6 priority . 29
7.9  ISO 29281 Intelligent transport systems CALM non-IP networking . 29
7.9.1  ISO 29281 General requirement . 29
7.9.2  ISO 29281-1 Non-IP networking . 30
7.9.3  ISO 29281 -2 Fast networking & transport layer protocol (FNTP) . 31
7.9.4  ISO 29281 -3 Legacy system support . 34
7.9.5  ISO 29281 Communication scenarios . 37
7.10  ISO 21218 CALM Lower Layer SAP . 37
7.10.1  ISO 21218 overview .37
7.11  ISO 24102 CALM management .38
7.12  CALM Media .39
7.12.1  ISO 21215 CALM M5 .39
7.12.2  ISO 21214 CALM Infrared .41
7.12.3  ISO 21216 CALM Millimetre .42
7.12.4  ISO 24103 CALM media adapted interface layer .43
7.12.5  ISO 25111CALM General requirements for public networks .45
7.12.6  ISO 21212 CALM GSM .49
7.12.7  ISO 21213 CALM UMTS .50
7.12.8  ISO 28282 CALM Satellite .51
7.12.9  ISO 25112 CALM MWB using IEEE 802.16 .54
7.12.10 ISO 29283 CALM MWB using IEEE 802.20 .55
7.12.11 ISO 25113 CALM MWB using HC-SDMA .56
7.12.12 ISO 13183 CALM Broadcast .56
7.14  Facilities layer for CALM communications .59
7.15  Application management for CALM communications .59
7.15.1  ISO TR 12859 Privacy .59
7.15.2  ISO 26683-2 Freight land conveyance content identification .59
7.16  Support interfaces .59
7.16.1  Driver identification .59
7.16.2  Physical interfaces to ancilliary devices and data .59
8  Quality of service requirements .59
9  Test requirements .59
10  Marking, labelling and packaging .60
11  Declaration of patents and intellectual property .60
Annex A (Normative) Guidance regarding the initiation of an application service communication
session .61
A.1  General scenario .61
A.2  Communications scenario .61
A.2.1  PROCESS A: IVS INITIATES .62
A.2.2  PROCESS B: Application service provider (ASP) INITIATES .62
A.2.2.1 PROCESS B1: ASP BROADCAST INITIATES .62
A.2.2.2 Targetted WAKE UP .62
A.2.2.3 PROCESS B2: ASP TARGETS SPECIFIC RECIPIENT VIA UMTS (or similar) .63
A.2.3  PROCESS C: USER TELLS ASP WHEN VEHICLE IS IN OPERATION .63
A.2.4  PROCESS D: SERVICE ANNOUNCEMENT from RSUs INITIATES .63
Bibliography .65

iv © ISO 2013 – All rights reserved

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
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of
ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2. www.iso.org/directives
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. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is ISO/TC 204, Intelligent transport systems
ISO 15638 consists of the following parts, under the general title Intelligent transport systems — Framework
for collaborative Telematics Applications for Regulated commercial freight Vehicles (TARV):
— Part 1 Framework and architecture
— Part 2: Common platform parameters using CALM
— Part 3: Operating requirements, 'Approval Authority' procedures, and enforcement provisions for the
providers of regulated services
— Part 5:Generic vehicle information
— Part 6: Regulated applications [Technical Specification]
— Part 7: Other applications
— Part 8: Vehicle access monitoring (VAM) [Technical Specification]
— Part 9: Remote electronic tachograph monitoring (RTM) [Technical Specification]
— Part 10: Emergency messaging system/eCall (EMS) [Technical Specification]
— Part 11: Driver work records (work and rest hours compliance) (DWR) [Technical Specification]
— Part 12: Vehicle mass monitoring (VMM) [Technical Specification]
— Part 14: Vehicle access control (VAC) [Technical Specification]
— Part 15: Vehicle location monitoring (VLM) [Technical Specification]
— Part 16: Vehicle speed monitoring (VSM) [Technical Specification]
— Part 17: Consignment and location monitoring (CLM) [Technical Specification]
— Part 18: ADR (Dangerous Goods) transport monitoring (ADR) [Technical Specification]
— Part 19: Vehicle parking facilities (VPF) [Technical Specification]
The following parts are under preparation:
— Part 4: System security requirements [Technical Specification]
— Part 13: Mass Penalties and Levies (VMC)

vi © ISO 2013 – All rights reserved

Introduction
Many ITS technologies have been embraced by commercial transport operators and freight owners, in the
areas of fleet management, safety and security. Telematics applications have also been developed for
governmental use. Such regulatory services in use or being considered vary from country to country, but
include electronic on-board recorders, vehicle charging, digital tachograph, on-board mass monitoring, vehicle
access monitoring, hazardous goods tracking and e-call. Additional applications with a regulatory impact being
developed include, fatigue management, speed monitoring and heavy vehicle charging based on mass,
location, distance and time.
In such an emerging environment of regulatory and commercial applications, it is timely to consider an overall
architecture (business and functional) that could support these functions from a single platform within a
commercial freight vehicle that operate within such regulations. International Standards will allow for a speedy
development and specification of new applications that build upon the functionality of a generic specification
platform. A suite of standards deliverables is required to describe and define the framework and requirements
so that the on board equipment and back office systems can be commercially designed in an open market to
meet common requirements of jurisdictions.
This suite of standards addresses and defines the framework for a range of cooperative telematics
applications for regulated commercial freight vehicles (such as access monitoring, driver fatigue management,
speed monitoring, on-board mass monitoring and charging). The overall scope includes the concept of
operation, legal and regulatory issues, and the generic cooperative provision of services to regulated
commercial freight vehicles, using an on-board ITS platform. The framework is based on a (multiple) service
provider oriented approach provisions for the certification and auditing of service providers.
This suite of standards deliverables will:
 provide the basis for future development of cooperative telematics applications for regulated
commercial freight vehicles. Many elements to accomplish this are already available. Existing relevant
standards will be referenced, and the specifications will use existing standards (such as CALM)
wherever practicable.
 allow for a powerful platform for highly cost-effective delivery of a range of telematics applications for
regulated commercial freight vehicles.
 a business architecture based on a (multiple) service provider oriented approach
 address legal and regulatory aspects for the certification and auditing of service providers.

This suite of standards deliverables is timely as many governments (Europe, North America, Asia and
Australia/New Zealand) are considering the use of telematics for a range of regulatory purposes. Ensuring that
a single in-vehicle platform can deliver a range of services to both government and industry through open
standards and competitive markets is a strategic objective.
This part of ISO 15638 provides definition and specification of the wireless communications media and related
aspects required to support TARV and therefore the other parts of ISO 15638 by adherence to the ‘CALM’
ITS-station wireless communication and networking International Standards. This ensures a stable and
interoperable communications architecture between a vehicle and an application service provider, and is also
capable of vehicle-vehicle communications, and enables the same in-vehicle system (IVS) to support other
standardised cooperative ITS systems using the same communications platform(s)
NOTE 1 The definition of what comprises a ‘regulated’ vehicle is regarded as an issue for National decision, and may
vary from country to country. This suite of standards deliverables will not impose any requirements on nations in respect of
how they define a regulated vehicle.
NOTE 2 The definition of what comprises a ‘regulated’ service is regarded as an issue for National decision, and may
vary from country to country. This suite of standards deliverables will not impose any requirements on nations in respect of
which services for regulated vehicles countries will require, or support as an option, but will provide standardised sets of
requirements descriptions for identified services to enable consistent and cost efficient implementations where
implemented.
NOTE 3 Cooperative ITS applications, in this context, is defined as the use of ITS to meet both commercial and
regulatory needs from a single on-board platform.
viii © ISO 2013 – All rights reserved

INTERNATIONAL STANDARD ISO 15638-2:2013(E)

Intelligent transport systems — Framework for collaborative
Telematics Applications for Regulated commercial freight
Vehicles (TARV) —
Part 2:
Common platform parameters using CALM
1 Scope
This part of ISO 15638 defines a generic cooperative ITS service (4.3) platform for TARV using CALM,
including protocol of coding, timing, and performance and support interfaces (such as driver ID card/USB or
similar etc.).
2 Conformance
This part of ISO 15638 defines requirements for wireless communications within the TARV context, and has
no specific conformance tests defined herein. Some aspects defined within may have conformance tests
defined in other parts of ISO 15638.
Conformance declarations for the various parts of a CALM-compliant system shall be based on the relevant
CALM-related International Standards that are normatively referenced in this part of ISO 15638.
Conformance to any other International Standard or specification referenced in this part of ISO 15638 shall be
ascertained according to the requirements of the referenced deliverable.
Conformance to this part of ISO 15638 is therefore a matter of self declaration of compliance, or by
submission to a test house to ascertain that the provisions of the clauses of this part of ISO 15638 have been
adhered to.
3 Normative references
The following referenced documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 12253 Road transport and traffic telematics — Dedicated short-range communication — Physical
layer using microwave at 5,8 GHz
EN 12795 Road transport and traffic telematics — Dedicated Short Range Communication (DSRC)
— DSRC data link layer: medium access andlogical link control
EN 12834 Road Transport and Traffic Telematics — Dedicated Short-Range Communication
(DSRC) — DSRC application layer
ISO/TR 12859 Intelligent transport systems — System architecture — Privacy aspects in ITS standards
and systems
ISO 13183 Intelligent transport systems — Communications access for land mobiles (CALM) —
Broadcast communications
ISO 15628  Road transport and traffic telematics — Dedicated short range communication (DSRC) —
DSRC application layer
ISO 15638 -1 Intelligent transport systems — Framework for cooperative telematics applications for
regulated commercial freight vehicles (TARV) — Part 1: Framework and architecture
ISO 15638 -3 Intelligent transport systems — Framework for collaborative Telematics Applications for
Regulated commercial freight Vehicles (TARV) — Part 3: Operating requirements,
'Approval Authority' procedures, and enforcement provisions for the providers of regulated
services
ISO 15638 -4 Intelligent transport systems — Framework for collaborative Telematics Applications for
Regulated commercial freight Vehicles (TARV) — Part 4: System security requirements
ISO 15638 -5 Intelligent transport systems — Framework for collaborative Telematics Applications for
Regulated commercial freight Vehicles (TARV) — Part 5: Generic vehicle data
ISO 15638 -6 Intelligent transport systems — Framework for collaborative Telematics Applications for
Regulated commercial freight Vehicles (TARV) — Part 6: Regulated applications
ISO 15638 -7 Intelligent transport systems — Framework for collaborative Telematics Applications for
Regulated commercial freight Vehicles (TARV) — Part 7: Other applications
ISO 21210 Intelligent transport systems — Communications access for land mobiles (CALM) — IPv6
Networking
ISO 21212 Intelligent transport systems — Communications access for land mobiles (CALM) — 2G
Cellular systems
ISO 21213 Intelligent transport systems — Communications access for land mobiles (CALM) — 3G
Cellular systems
ISO 21214 Intelligent transport systems — Communications access for land mobiles (CALM) — Infra-
red systems
ISO 21215 Intelligent transport systems — Communications access for land mobiles (CALM) — M5
ISO 21216 Intelligent transport systems — Wireless communications — CALM using millimetre
communications — Air interface
ISO 21217 Intelligent transport systems — Communications access for land mobiles (CALM) —
Architecture
ISO 21218 Intelligent transport systems — Communications access for land mobiles (CALM) —
Access technology support
ISO 24102 Intelligent transport systems — Communications access for land mobiles (CALM) —
Management
ISO 25111 Intelligent transport systems — Communications access for land mobiles (CALM) —
General requirements for using public networks
ISO 25112 Intelligent transport systems — Communications access for land mobiles (CALM) —
Mobile wireless broadband using IEEE 802.16
ISO 25113 Intelligent transport systems — Communications access for land mobiles (CALM) —
Mobile wireless broadband using HC-SDMA
ISO 26683-2 Intelligent transport systems — Freight land conveyance content identification and
communication — Part 2: Application interface profiles
ISO 29281-1 Intelligent transport systems -- Communication access for land mobiles (CALM) — Non-IP
networking — Part 1: Fast networking & transport layer protocol (FNTP)
ISO 29281-2 Intelligent transport systems -- Communication access for land mobiles (CALM) — Non-IP
networking — Part 2: Legacy system support
ISO 29282 Intelligent transport systems — Communications access for land mobiles (CALM) —
Satellite networks
ISO 29283 ITS CALM Mobile Wireless Broadband applications using Communications in accordance
with IEEE 802.20
ITU-R BS.1194-2 Systems for multiplexing frequency modulation (FM) sound broadcasts with a sub-carrier
2 © ISO 2013 – All rights reserved

data channel having a relatively large transmission capacity for stationary and mobile
reception
ITU-R BO.1408-1 Transmission system for advanced multimedia services provided by integrated services
digital broadcasting in a broadcasting-satellite channel
ITU-R BO.1516 System D, Digital multiprogramme television systems for use by satellites operating in the
11/12 GHz frequency range
ITU-R BT.1306-3 System C, Error correction, data framing modulation and emission methods for digital
terrestrial television broadcasting
ITU-R BT.1833 Multimedia System C, Broadcasting of multimedia and data applications for mobile
reception by handheld receivers
ITU-R BS.1114-6 System F, Systems for terrestrial digital sound broadcasting to vehicular, portable and
fixed receivers in the frequency range 30-3 000 MHz
IEEE 802.11 IEEE Standard for Information technology — Telecommunications and information
exchange between systems — Local and metropolitan area networks — Specific
requirements — Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer
(PHY) Specifications
IEEE 1609.4 Wireless Access in Vehicular Environments (WAVE) — Multi-channel operation
IEEE 802.16e Part 16: Air interface for fixed and mobile broadband wireless access systems:
Amendment for physical and medium access control layers for combined fixed and mobile
operation in licensed bands
IEEE 802.16g Part 16: Air interface for fixed and mobile broadband wireless access systems:
Management plane procedures and services
Part 20: Air Interface for Mobile Broadband Wireless Access Systems Supporting
IEEE 802.20
Vehicular Mobility - Physical and Media Access Control Layer Specification
IETF RFC 2461 Neighbor Discovery for IPv6
IETF RFC 2462 IPv6 Stateless Address Auto-configuration
IETF RFC 3963 NEMO Basic Support protocol
IETF RFC 4294 IPv6 Node Requirements
3GPP/3GPP2 3GPP/3GPP2 Standards as they relate to 2G/2.5G and 3G
TIA-95-B Mobile Station-Base Station Compatibility Standard for Wideband Spread Spectrum
Cellular Systems (cdmaOne)
ANSI/TIA-136-A Mobile Station-Base Station Compatibility Standard for Wideband Spread Spectrum
Cellular Systems
TIA/EIA/IS-54-C Cellular System Dual-Mode Mobile Station--Base Station Compatibility Standard
ARIB PDC RCR Personal Digital Cellular Telecommunication System Fascicle 1
Standard No.27
ARIB STD-T75 Dedicated Short-Range Communication (Japan);
ITU-R M.1801 Radio interface standards for broadband wireless access systems, including mobile and
nomadic applications, in the mobile service operating below 6 GHz.
ANSI ATIS HC-SDMA is described in ITU-R document in this Recommendation
(“RecDoc. 8/167(Rev.1) Annex 4 III”)
TTAS.KO-06.0025 Standard of DSRC Radio Communication between Road-side Equipment and On-board
Equipment in 5.8GHz band (Korea);
4 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 15638-1 and the following apply.
4.1
continuous session
establishes a session as soon as the vehicle is switched on, and maintains that session, so long as it is
possible, for as long as the vehicle is operating
4.2
heterogeneous handover
process by which a communication link is switched from one virtual communication interface to another one
of a different medium type
4.3
ITS service
communication functionality offered by an ITS-station to an ITS-station application
4.4
ITS-station
ITS-s
entity in a communication network, comprised of application, facilities, networking and access layer
components specified in ISO 21217 that operate within a bounded secure management domain
4.5
MC Mode
multi-carrier mode
NOTE: The 625k-MC mode referred to in this document is an enhancement of ANSI ATIS-0700004.2005, High Capacity-
Spatial Division Multiple Access (HC-SDMA) Radio Interface Standard September, 2005.
4.6
prime mover
heavy-duty commercial vehicle tractor unit which serves as a method of moving trailers (most often semi-
trailers) by coupling to the trailer using some sort of mechanical lock system, usually a fifth wheel coupling
NOTE: Tractor units can couple to different types of trailers.
4.7
time controlled session
active communication session created when the in-vehicle equipment at a time of its choosing initialises a
time controlled session in order to send a message/exchange data, or it receives an inbound call, such as
receipt of a safety message from the infrastructure; and the session is ended as soon as the task is achieved
4.8
user controlled session
user of the vehicle elects, for whatever reason, to connect upon the user’s instruction and disconnect
immediately when instructed to do so by the user
5 Symbols (and abbreviated terms)
For the purposes of this document, the general symbols and abbreviations for TARV are given in ISO 15638-
1, and in the standards specifically reference in a Clause title. For additional symbols and abbreviated terms
specific to ISO 15638-2 the following apply:
API
application programme interface

CAL
communication adaptation sub-layer

4 © ISO 2013 – All rights reserved

CI
communication interface
CIAC
communications interface access class

CIC
communication interface class
CoA
care of address
C-SAP
communications service access point

CVIS
Cooperative Vehicle-Infrastructure Systems (EU Project)

DAB
digital audio broadcasting
DARC
data radio channel
DNS
domain name server
DSRC
dedicated short range communication

EGPRS
enhanced GPRS (EDGE)
FA
facilities – applications
FDD
frequency division duplex
FSS
fixed satellite service(s)
GEO
geostationary earth orbit
GNSS
global navigation satellite system

GPRS
general packet radio service
GSM
global system mobiles
HC-SDMA
high capacity spatial division multiple access

HoA
home address
IETF
internet engineering task force

I-Mode
mobile internet (Japan)
IN
interface – network
IP
internet protocol
IPv4
internet protocol version 4
IPv6
internet protocol version 6
IR
infra-red
ISDB-TSB
Integrated services digital broadcasting-terrestrial sound broadcasting

ITS-s
ITS-station (4.4)
ITS-SCU
ITS-station (4.4) secure communication unit

IVS
in-vehicle system
LAN
local area network
LEO
low earth orbit
LLC
link layer control
MA
management – applications
MAC
media access control
MAE
management adaptation entity
MF
management – facilities
MI
management - interaction
MIH
media independent handover
6 © ISO 2013 – All rights reserved

MMAE
medium management adaptation entity

MN
management - network
MNN
IPv6 mobile network node (by extension an abbreviation for ‘Mobile Network [ITS-s IPv6 LAN] Modes)

MNP
mobile network prefix
M-SAP
management service access point

MSS
mobile satellite service
MSS/ATC
mobile satellite service and ancillary terrestrial components

MWB
mobile wireless broadband
NEMO
network mobility (IETF)
NF
network – facilities
OSI
open systems interconnection
PHY
physical link layer
PPP
point to point protocol
RDS
radio data service
S-DMB
satellite digital multimedia broadcasting

SA
security – applications
SAE
security adaptation entity
SAP
service access point
SF
security – facilities
SI
security – interaction
SN
security – networking
TARV
telecommunications applications for regulated (commercial) vehicles

TCP
transport control protocol
TID
trailer identifier
TDD
time division duplex
UDP
user datagram protocol
UMTS
universal mobile telecommunications system

VCI
virtual communication interface

VMS
variable message sign
WAP
wireless access protocol
W-LAN
wireless local area network
6 General overview and framework
ISO/TS 15638-1 provided a framework and architecture for TARV. It provided a general description of the
roles of the actors in TARV and their relationships. TARV communications shall be compliant to that
framework and architecture.
To understand clearly the TARV framework the reader is referred to ISO/TS 15638-1.
Figure 1 shows the role model conceptual architecture showing the key actors and their relationships.
8 © ISO 2013 – All rights reserved

Figure 1 — Role model conceptual architecture
(Source: ISO 15638-1)
ISO 15638 provides a suite of standards deliverables addresses and defines the framework for a range of
cooperative telematics applications for regulated commercial freight vehicles (such as access monitoring,
driver fatigue management, speed monitoring, on-board mass monitoring and charging). The overall scope
includes the concept of operation, legal and regulatory issues, and the generic cooperative ITS service (4.3)
platform. The framework is based on a (multiple) service provider oriented approach provisions for the
certification and auditing of service providers. ISO 15638 is comprised of seven framework parts and twelve
application specific parts.
 Part 1 Framework and architecture
 Part 2: Common platform parameters using CALM
 Part 3: Operating requirements, 'Approval Authority' procedures, and enforcement provisions for the
providers of regulated services
 Part 5:Generic vehicle information
 Part 6: Regulated applications [Technical Specification]
 Part 7: Other applications
 Part 8: Vehicle access monitoring (VAM) [Technical Specification]
 Part 9: Remote electronic tachograph monitoring (RTM) [Technical Specification]
 Part 10: Emergency messaging system/eCall (EMS) [Technical Specification]
 Part 11: Driver work records (work and rest hours compliance) (DWR) [Technical Specification]
 Part 12: Vehicle mass monitoring (VMM) [Technical Specification]
 Part 14: Vehicle access control (VAC) [Technical Specification]
 Part 15: Vehicle location monitoring (VLM) [Technical Specification]
 Part 16: Vehicle speed monitoring (VSM) [Technical Specification]
 Part 17: Consignment and location monitoring (CLM) [Technical Specification]
 Part 18: ADR (Dangerous Goods) transport monitoring (ADR) [Technical Specification]
 Part 19: Vehicle parking facilities (VPF) [Technical Specification]
The following parts are under preparation:
 Part 4: System security requirements [Technical Specification]
 Part 13: Mass Penalties and Levies (VMC)
This part specifies how different media can use the CALM suite of standards to provide wireless
communications interface between the IVS and the application service provider.
7. Requirements
7.1 General
This part of ISO 15638 defines a generic cooperative ITS service (4.3) platform for TARV using CALM,
including protocol of coding, timing, and performance and support interfaces (such as driver ID card/USB or
similar etc.)
7.2 ISO 21217 CALM Architecture
7.2.1 ISO 21217 General requirement
The wireless network aspects of instantiations of TARV shall comply to the requirements of, and operate
within the framework of the architecture defined in ISO 21217 Intelligent transport systems -Communications
access for land mobiles (CALM) – ITS-station Architecture.
10 © ISO 2013 – All rights reserved

The following subClauses identify some of the aspects of ISO 21217 that relate specifically to instantiation of
ISO 15638 TARV and where appropriate its compliance to ISO 21217. However, in respect of CALM
architecture, ISO 21217 is the paramount and core document and shall be consulted, and in respect of
wireless communications shall be complied with in any TARV instantiation.
7.2.2 ISO 21217 Specific aspects as they relate to TARV
7.2.1.1 Principles and viewpoint
Clause 5.1 of ISO 21217 states that ‘CALM-related International Standards shall focus on specifying open
interfaces with regard to the functionalities required for all relevant layers of the OSI reference model’.
7.2.1.2 Wireless links
Figure 2 (of ISO 21217) illustrates the global ITS scope to be considered by the set of CALM-related
International Standards. It shows several types of access technologies for wireless communication links
between individual ITS-stations and between ITS-stations and legacy stations which can be expected to be
present in ITS environments.
NOTE The CALM concept is not limited to the access technologies presented in Figure 2.

Figure 2 — Examples of wireless links employing various access technologies
(Source ISO 21217)
7.2.3 ISO 21217 Communication interface and channel types
ISO 21217 defines an implementation of an access technology as a communication interface (CI). The
concept of a communication interface (CI) and its virtual communication interfaces (VCIs) are specified in
ISO 21218. (See 7.10 below).
All CALM communication access points are regarded as peers and are called ‘ITS-stations’ (ITS-s). In the
context of TARV an ITS-s may be a roadside communication point, a GSM/UMTS access point, a wide area
local network or WiFi point, or any of the CALM supported wireless access points determined below; a truck;
or a trailer (connected to the prime mover (4.6) via CALM [other trailer-tractor communications may be hard
wired or use other communications]).
Logical communication channels are determined as a key element of CALM's abstraction of ITS-station
applications from the physical communication channels used to transport the information. ITS-station
applications communicate through logical channels which are mapped by the ITS-s management to physical
channels in communication interfaces. Automatic mapping of ITS-s applications on specific communication
interfaces, referred to as “CI selection management”, is specified in ISO 24102.(See 7.11 below)
Definitions of logical channel types are provided in ISO 21218. (See 7.10 below).
7.2.4 ISO 21217 Handover
It is envisaged that most TARV communications sessions will be short, therefore involving only one
wireless medium. The IVS shall detect the media possibilities and, through CALM management
(ISO 24102 See 7.11 below), select the most appropriate; or the IVS will be contacted by the landside
system using an available wireless medium.
The TARV communication session will be transacted over that medium.
However, an essential feature of the CALM concept that distinguishes it from traditional communication
systems is that applications are abstracted from the access technologies that provide the wireless
connectivity and the networks that transport the information from the source to the destination(s). ITS-
stations are not limited to a single access technology and networking protocol and can implement any of
those supported, and the ITS-s management can make optimal use of all these resources. To exploit this
flexibility, CALM-compliant systems provide the ability to support handover of different types including
 those involving a change of communication interface (which may or may not involve a change of
access technology, since ITS-stations may have multiple communication interfaces using the same
access technology),
 those involving reconfiguration or change of the network employed to provide connectivity, and
 those involving both a change in communication interface and network reconfiguration.

The following examples illustrate the various types of handover that are possible.
⎯ Homogeneous handover:
Maintaining a session between an ITS-station application in a vehicular ITS subsystem and an ITS-
station application in a central ITS subsystem using subsequent roadside ITS-s’s along the road of the
same roadside subsystem, using the same access technology in the various ITS-s.

⎯ Heterogeneous handover:
Maintaining a session between an ITS-s application in a vehicular ITS subsystem and an ITS-s
application in a central ITS subsystem by switching from a dedicated CALM access technology, e.g.
M5 or IR,
...