URLLC (Ultra-Reliable Low-Latency Communications)

Also known as: Ultra-Reliable Low-Latency Communications

URLLC is one of the three 5G service categories defined by 3GPP alongside eMBB and mMTC, targeting user-plane latencies as low as 1 ms and packet reliability of 99.999% or better. URLLC is achieved through short transmission time intervals, mini-slots, pre-emption, PDCP duplication, redundant PDU sessions and integration with Time-Sensitive Communications, and is the enabler for industrial automation, remote control, and cellular vehicle-to-everything use cases.

Categories: Protocols and Standards

URLLC in context

Telecom security is written into standards from 3GPP, GSMA, ETSI, IETF and ITU-T. Understanding which body owns which specification, and how they interlock, is essential for both design and audit work.

To place URLLC in the wider telecom-security picture, review 3G, 3GPP, 4G, 5GNR, 6G and ADSL — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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