Adding Explicit Passive Measurability of Two-Way Latency to the QUIC Transport Protocol

Document Type Expired Internet-Draft (individual)
Authors Brian Trammell  , Piet De Vaere  , Roni Even  , Giuseppe Fioccola  , Thomas Fossati  , Marcus Ihlar  , Al Morton  , Stephan Emile 
Last updated 2018-11-15 (latest revision 2018-05-14)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes the addition of a "spin bit", intended for explicit measurability of end-to-end RTT, to the QUIC transport protocol. It proposes a detailed mechanism for the spin bit, as well as an additional mechanism, called the valid edge counter, to increase the fidelity of the latency signal in less than ideal network conditions. It describes how to use the latency spin signal to measure end-to-end latency, discusses corner cases and their workarounds in the measurement, describes experimental evaluation of the mechanism done to date, and examines the utility and privacy implications of the spin bit.


Brian Trammell (
Piet De Vaere (
Roni Even (
Giuseppe Fioccola (
Thomas Fossati (
Marcus Ihlar (
Al Morton (
Stephan Emile (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)