ISO 22086-2:2024
(Main)Intelligent transport systems (ITS) — Network-based precise positioning infrastructure for land transportation — Part 2: Functional requirements and data sets for nomadic devices
Intelligent transport systems (ITS) — Network-based precise positioning infrastructure for land transportation — Part 2: Functional requirements and data sets for nomadic devices
This document specifies the functional requirements of nomadic devices for lane-level positioning and integrity monitoring with the network-based precise positioning infrastructure for land transportation (NETPPI-LT), a lane-level positioning system based on global navigation satellite systems (GNSS) described in ISO/TR 22086-1. This document identifies the GNNS threats to monitor and the errors to remove or mitigate to achieve lane-level accuracy and integrity. It also specifies the data sets to be contained in messages between the nomadic device and the control station providing GNSS correction and integrity information. This specification enables the nomadic device to support lane-level positioning and integrity monitoring. Enabling techniques and methods, which can be different for each provider or vendor, are not addressed in this document.
Systèmes de transport intelligents — Infrastructure de positionnement précis en réseau pour les transports terrestres — Partie 2: Exigences fonctionnelles et ensembles de données pour les dispositifs nomades
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International
Standard
ISO 22086-2
First edition
Intelligent transport systems
2024-11
(ITS) — Network-based precise
positioning infrastructure for land
transportation —
Part 2:
Functional requirements and data
sets for nomadic devices
Systèmes de transport intelligents — Infrastructure de
positionnement précis en réseau pour les transports terrestres —
Partie 2: Exigences fonctionnelles et ensembles de données pour
les dispositifs nomades
Reference number
© ISO 2024
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 3
5 Functional requirements . 4
5.1 Overview .4
5.2 Reference network selection and request .6
5.3 Fault detection and isolation .6
5.4 Range correction and positioning .7
5.5 Protection level computation .8
6 Message set definitions . 8
6.1 General .8
6.2 Request network information .9
6.3 Receive network information .9
6.4 Request augmentation information .9
6.5 Receive augmentation information .10
Annex A (informative) Examples of GNSS fault detection .11
Annex B (informative) Protection level computation .13
Bibliography . 14
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
A list of all parts in the ISO 22086 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv
Introduction
Lane-level positioning is deemed as a critical function to facilitate emerging applications of intelligent
transport systems (ITS) for safety and traffic efficiency. Another critical issue for applications with safety
concerns is to guarantee or monitor integrity of the positioning result. Global navigation satellite systems
(GNSS) have led the provision of position along with velocity and time information in the ITS domain, but
lane-level accuracy cannot be achieved and integrity monitoring functionalities are not supported with
commercial low-cost GNSS receivers operating in standalone mode.
The ISO 22086 series deals with standard issues on a nomadic device for lane-level positioning and
integrity monitoring with a GNSS-based lane-level positioning system, referred to as network-based
precise positioning infrastructure for land transportation (NETPPI-LT). NETPPLI-LT provides additional
information to enhance positioning accuracy and to monitor integrity over wireless links.
v
International Standard ISO 22086-2:2024(en)
Intelligent transport systems (ITS) — Network-based precise
positioning infrastructure for land transportation —
Part 2:
Functional requirements and data sets for nomadic devices
1 Scope
This document specifies the functional requirements of nomadic devices for lane-level positioning and
integrity monitoring with the network-based precise positioning infrastructure for land transportation
(NETPPI-LT), a lane-level positioning system based on global navigation satellite systems (GNSS) described
in ISO/TR 22086-1. This document identifies the GNNS threats to monitor and the errors to remove
or mitigate to achieve lane-level accuracy and integrity. It also specifies the data sets to be contained in
messages between the nomadic device and the control station providing GNSS correction and integrity
information. This specification enables the nomadic device to support lane-level positioning and integrity
monitoring. Enabling techniques and methods, which can be different for each provider or vendor, are not
addressed in this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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/TR 22086-1, Intelligent transport systems (ITS) — Network based precise positioning infrastructure for
land transportation — Part 1: General information and use case definitions
ETSI EN 302 890-2:2020, Intelligent transport systems (ITS); Facilities layer function; Part 2: Position and time
management (PoTi); Release 2
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TR 22086-1 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
alert limit
error tolerance not to be exceeded without issuing an alert
3.2
augmentation information
correction and integrity information (3.7) for global navigation satellite systems (GNSS) measurements
3.3
auxiliary reference station
reference station within a set of the reference networks, which captures global navigation satellite systems
(GNSS) raw measurements (3.14) at a known position and sends them to the control stations of the network-
based precise positioning infrastructure for land transportation (NETPPI-LT) to produce correction
differences of the range measurements (3.12) relative to the ones of the master reference station (3.8)
3.4
carrier-phase measurement
measure of range between a navigation satellite and a nomadic device or a global navigation satellite
systems (GNSS) receiver embedded within the nomadic device, based on the phase measurements of the
carrier frequency
Note 1 to entry: Carrier-phase measurement is expressed in metres.
3.5
pseudorange (code) measurement
measure of range between a navigation satellite and a nomadic device or a global navigation satellite systems
(GNSS) receiver embedded within the nomadic device, based on the phase delay of the pseudorandom noise code
Note 1 to entry: Pseudorange measurement is expressed in metres.
3.6
correction information
information including raw measurements (3.14) of a master or virtual reference station and correction
differences for pairs of reference stations to remove common errors in global navigation satellite systems
(GNSS) range measurement (3.12) of a nomadic device
3.7
integrity information
information used to determine either the occurrence of failures or uncertainties (e.g. one-sigma) in the
position domain
3.8
master reference station
reference station within a set of the reference networks, for which raw measurements (3.14) and coordinate
information are transmitted to a nomadic device via the control stations of the NETPPI-LT
3.9
navigation message
message containing ephemeris data, used to calculate the position of each global navigation satellite systems
(GNSS) satellite in orbit, and information on time and status of entire satellites in the constellation
3.10
network RTK
network real-time kinematic
RTK (3.13) technique based on multiple reference stations to support an extended service coverage by
provisioning correction differences of the range measurements (3.12) for pairs of master and auxiliary
reference stations (3.3) in addition to raw measurements (3.14) of the master reference station (3.8)
3.11
protection level
upper bound for the positioning error, which is an instantaneous estimate based on different measurements
related to the quality of the received signal, range measurements (3.12), and navigation message (3.9)
3.12
range measurement
pseudorange and carrier-phase measurements (3.4) between a navigation satellite and a nomadic device or a
global navigation satellite systems (GNSS) receiver embedded within the nomadic device
3.13
real-time kinematic
RTK
differe
...
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