ISO 17438-5:2025 PDF

Intelligent transport systems — Indoor navigation for personal and vehicle ITS stations — Part 5: Requirements and message specification for central ITS station (C-ITS-S) based positioning

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Title (English):

ISO 17438-5:2025

Intelligent transport systems — Indoor navigation for personal and vehicle ITS stations — Part 5: Requirements and message specification for central ITS station (C-ITS-S) based positioning

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 21
Publication date:: September 25, 2025
Edition:: ISO IS 17438 edition 1 version 1
ICS:: 03.220.01

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Description (English):

This document defines detailed use cases, requirements and message specifications for supporting central ITS station based indoor positioning to provide indoor navigation functionality between a personal/vehicle (P/V) ITS station and the central ITS station. This document is only applicable to the core flow for the central ITS station based indoor positioning. The following issues which are adjunctive but essential for commercial navigation services are beyond the scope of this document: — authorized and authenticated access of users and services, including security; — payment; — preparation of indoor data which are necessary for indoor navigation; — low-level communication protocols required to transfer and share data from and to a roadside ITS station or a central ITS station; — other issues dependent on implementation of an instance of indoor navigation.

Technical details

Technical committee: ISO/TC 204 - Intelligent transport systems
SKU: ISO 17438-5:2025

Abstract

Overview

ISO 17438-5:2025 - "Intelligent transport systems - Indoor navigation for personal and vehicle ITS stations - Part 5" specifies requirements and message structures to support central ITS station (C-ITS-S) based (server‑based) indoor positioning. It focuses on the core flow between a personal/vehicle ITS station (P/V‑ITS‑S) and a C‑ITS‑S for delivering indoor navigation functionality. The document defines use cases, message flows (notably get-positions and candidate-positions), ASN.1 data types and an ASN.1 module (Annex A and Annex B), and conformance rules for mandatory/optional/conditional fields.

Key topics and requirements

Purpose: Enable server-based indoor positioning where the C‑ITS‑S computes a device’s position on request - useful because GNSS signals are generally unavailable indoors.
Use case: UC - Server based positioning (ISO 17438-1 reference); pre‑conditions include bi‑directional communication and appropriate access permission for the P/V‑ITS‑S.
Message flow:
- get-positions: P/V‑ITS‑S sends scanned resources (e.g., Wi‑Fi, BLE, cellular measurements) to the C‑ITS‑S.
- candidate-positions: C‑ITS‑S returns calculated possible positions; the P/V‑ITS‑S selects the most likely position for navigation.
Message and data model:
- Definitions use ASN.1 conventions; normative data types and code lists are in Annex A and ASN.1 schema in Annex B.
- Fields are categorized as mandatory, optional or conditional; implementations must respect multiplicity and conformance rules.
Scope limits: The standard intentionally excludes authorization/security, payment, indoor map/data preparation, and low‑level transport protocols - it addresses only the core application‑level flow for C‑ITS‑S based positioning.

Applications and who uses it

Primary users:
- ITS architects and system integrators designing server-based indoor positioning services.
- Developers of C‑ITS‑S platforms and P/V‑ITS‑S client applications (mobile apps, vehicle systems, robots).
- Location service providers, airports, malls, public transport hubs and facility managers integrating indoor navigation into ITS ecosystems.
Practical applications:
- Vehicle and pedestrian indoor navigation inside terminals, parking garages, and large venues.
- Fleet management and indoor routing for service robots or logistics vehicles.
- Interoperable positioning services where centralized computations simplify client devices and protect indoor reference datasets.

Related standards

ISO 17438-1: General information and use case definition for indoor navigation.
ISO 17438-4 (references): Definitions for server-based/indoor positioning concepts.
ISO 13184-2: Related ITS guidance protocol references.

Keywords: ISO 17438-5:2025, indoor navigation, central ITS station, C-ITS-S, server-based positioning, get-positions, candidate-positions, ASN.1, P/V‑ITS‑S, ITS station.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and requirements

Purpose: Enable server-based indoor positioning where the C‑ITS‑S computes a device’s position on request - useful because GNSS signals are generally unavailable indoors.
Use case: UC - Server based positioning (ISO 17438-1 reference); pre‑conditions include bi‑directional communication and appropriate access permission for the P/V‑ITS‑S.
Message flow:
- get-positions: P/V‑ITS‑S sends scanned resources (e.g., Wi‑Fi, BLE, cellular measurements) to the C‑ITS‑S.
- candidate-positions: C‑ITS‑S returns calculated possible positions; the P/V‑ITS‑S selects the most likely position for navigation.
Message and data model:
- Definitions use ASN.1 conventions; normative data types and code lists are in Annex A and ASN.1 schema in Annex B.
- Fields are categorized as mandatory, optional or conditional; implementations must respect multiplicity and conformance rules.
Scope limits: The standard intentionally excludes authorization/security, payment, indoor map/data preparation, and low‑level transport protocols - it addresses only the core application‑level flow for C‑ITS‑S based positioning.

Applications and who uses it

Primary users:
- ITS architects and system integrators designing server-based indoor positioning services.
- Developers of C‑ITS‑S platforms and P/V‑ITS‑S client applications (mobile apps, vehicle systems, robots).
- Location service providers, airports, malls, public transport hubs and facility managers integrating indoor navigation into ITS ecosystems.
Practical applications:
- Vehicle and pedestrian indoor navigation inside terminals, parking garages, and large venues.
- Fleet management and indoor routing for service robots or logistics vehicles.
- Interoperable positioning services where centralized computations simplify client devices and protect indoor reference datasets.

Related standards

ISO 17438-1: General information and use case definition for indoor navigation.
ISO 17438-4 (references): Definitions for server-based/indoor positioning concepts.
ISO 13184-2: Related ITS guidance protocol references.

Keywords: ISO 17438-5:2025, indoor navigation, central ITS station, C-ITS-S, server-based positioning, get-positions, candidate-positions, ASN.1, P/V‑ITS‑S, ITS station.

ISO 17438-5:2025 PDF

Technical details

Abstract

Overview

Key topics and requirements

Applications and who uses it

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Applications and who uses it

Related standards

Related standards

Intelligent transport systems. Indoor navigation for personal and vehicle ITS station. General information an…

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