This is mentioned in https://datatracker.ietf.org/doc/html/rfc4960#section-6.3.1 and further described in https://datatracker.ietf.org/doc/html/rfc6298#section-4. The TCP RFCs mentioned G as the clock granularity, but in SCTP it should be set much higher, to account for the delayed ack timeout (ATO) of the peer (as that can be seen as a very high clock granularity). That one is set to 200ms by default in many clients, so a reasonable default limit could be set to 220 ms. If the measured variance is higher, it will be used instead. Bug: webrtc:12943 Change-Id: Ifc217daa390850520da8b3beb0ef214181ff8c4e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/232614 Commit-Queue: Victor Boivie <boivie@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35068}