Resending to include TSVWG chairs and ensure that the LS will be listed on the IETF datatracker. Please find enclosed a liaison statement from the 3GPP CT WG 4 (CT4). This WG is actually studying the introduction of QUIC as transport protocol instead of HTTP/2 in the 5G core network. The WG has some questions regarding the troubleshooting capabilities supported by QUIC compared to the ones available with TCP. The LS is officially addressed to the QUIC WG. However, it was highlighted that httpbis WG could also be interested in. I will let you decide if only QUIC or both are relevant in the discussion. 3GPP TSG CT4#95 11th – 15th November 2019 Reno, US 3GPP TSG CT4#96 24th – 28th February 2020 Sophia Antipolis, FR It would be good to receive an official feedback at the latest for the February meeting, where the study will be concluded (at least for this release).