IEC TS 62773:2014 PDF

Overview

IEC TS 62773:2014 - Railway applications: Procedure to determine the performance requirements for radio systems applied to radio‑based train control systems defines a structured procedure for deriving radio system performance requirements from operational and environmental preconditions. The Technical Specification is intended to help rail transport authorities and radio suppliers translate real‑world constraints (spectrum availability, track layout, climate, interference, operational profiles) into concrete radio parameters (latency, throughput, availability, security and transmission characteristics) suitable for radio‑based train control (TC) systems.

Key Topics

• Preconditions definition: environmental conditions (obstacles, climate, electromagnetic interference), regulatory constraints (spectrum allocation), and railway operational conditions (line speed, headway, station/track configuration).
• TC communication requirements: maximum tolerable loss of communication, network latency, TC transmission period, and throughput needs.
• Radio parameters: mapping of preconditions to measurable radio requirements such as availability, bit‑error rate, coverage, handover performance, security levels and transmission modes.
• Relationship matrices and tables: systematic matrices and tables linking specific preconditions to affected radio parameters to guide requirement derivation.
• Annex guidance: additional considerations including system continuity/in‑continuity, overlay on existing facilities, train localization and special operational cases.

Applications

IEC TS 62773:2014 is practical for:

• Rail transport authorities and infrastructure managers defining procurement specifications for radio systems used in train control.
• Radio suppliers and system integrators designing or validating radio solutions for safety‑critical TC applications.
• Signal engineers and network planners who must ensure that radio performance (coverage, latency, availability, security) meets operational headway and safety requirements.
• Regulators and spectrum managers assessing whether proposed radio solutions comply with spectrum and regulatory constraints.

Practical uses include producing tender requirements, assessing candidate radio technologies (continuous vs intermittent communication), dimensioning network capacity for expected train density, and identifying environmental mitigations to meet availability targets.

Related Standards (if applicable)

• Other IEC railway standards and national rail safety standards that govern signalling and train‑control interfaces.
• Relevant radio and spectrum regulations and commonly used rail radio systems and frameworks (e.g., regional or international train control system standards).

IEC TS 62773:2014 provides a reproducible, traceable method to convert operational needs and environmental constraints into quantifiable radio performance requirements - essential for deploying reliable, safety‑aware radio‑based train control systems.