ISO 21219-25:2024

Overview

ISO 21219-25:2024 - TPEG2-EMI specifies the Electromobility Information (EMI) application for TPEG2 (Traffic and Travel Information via Transport Protocol Experts Group, generation 2). The standard defines how information about electric vehicle (EV) charging infrastructure is encoded, delivered and processed over TPEG, covering charging parks, stations and individual charging points. Its goal is to enable interoperable, bandwidth-efficient distribution of static and dynamic charging data (connector types, charging modalities, availability, pricing and reservation options) to support route and trip planning for all electric vehicles.

Key topics and technical requirements

• Message and data model: formal EMI message structure and named message components (e.g., EMIMessage, ChargingParkLocation, ChargingStationInformation, ChargingParkAvailabilityVector).
• Datatypes and lookup tables: standard datatypes for connector types, pricing information, availability states and more, plus tables (emi001..emi012) for billing models, payment methods, facility types, plug types, reservability, etc.
• Static vs dynamic data: separation and encoding of permanent charging park metadata (location, operator, connector types) and real‑time status (availability, waiting times, reservation responses).
• Reservation and response handling: mechanisms to request and receive reservation status for charging points.
• Representation formats: normative support for TPEG binary and tpegML encodings (Annex A and Annex B).
• Operational constraints: application identification, version signalling, ordered components and extension rules to ensure compatibility and modest bandwidth use.
• Interoperability considerations: alignment with electromobility data exchange ecosystems to facilitate harmonization with operator management systems.

Practical applications and benefits

• For end users (drivers, fleet managers, navigation app users):
  • Identify suitable charging units (connector and power compatibility) and avoid unnecessary detours.
  • Check real‑time availability and waiting times to optimize routing and charging stops.
  • Make or confirm reservations at charging parks, improving trip predictability.
  • Compare pricing and billing options, including operator billing agreements.
• For service providers and operators:
  • Standardized data exchange between electromobility providers, charging park operators and TTI service providers.
  • Efficient broadcast of large charging networks with modest bandwidth, suitable for in‑vehicle systems and mobile apps.
  • Improved inter‑system interoperability with billing and roaming platforms.

Who should use this standard

• Navigation and TTI service providers, telematics vendors, map and routing platforms
• Electromobility providers, charge park operators, mobility service operators (MSPs)
• ITS integrators, OEMs, and software developers building EV charging discovery, reservation and routing features

Related standards and references

• ISO 21219 series (TPEG/TTI family)
• TPEG application encodings (TPEG‑Binary, tpegML) - normative annexes in the standard
• Electromobility exchange specifications (Open Charge Alliance, eMI3) - referenced for harmonization with operator systems

Keywords: ISO 21219-25:2024, TPEG2-EMI, electromobility charging infrastructure, EV charging availability, charging point reservation, connector type, TPEG, traffic and travel information.