Someone complained in the last posting that I was "spamming" them. If a list admin feels these announcements of a community event as spam - please unicast me and I will remove you off future announcements. The tech committee would like to announce a new accepted talk. Jae Won Chung and Feng Li (at Verizon) have done a lot of work on analyzing the effect of the different Linux TCP congestion control algorithms on LTE wireless networks while driving on a fast highway/road. In this talk they compare CUBIC to BBR. A little bit more details: ---- Unlike IEEE802.11 (wifi) and traditional 3G wireless links, LTE networks have high link variability and large end user mobility. There still exists a huge gap in understanding how TCP congestion control algorithms variants perform under such conditions. Mobile carriers often waste their efforts to improve throughput by fine tuning parameters of TCP CUBIC although CUBIC often fails to ramp up rapidly to congestion avoidance needs over LTE links. To have a better understanding of TCP performance over LTE networks, we conduct a comprehensive measurement study to compare CUBIC with its latest rival - BBR over a world leading tier-one mobile network in high speed driving condition. To our best knowledge, there is no measurement effort to compare performance of different TCP flavors over LTE networks on highway. In addition to our measurement contribution, our in-depth measurement result also conclude that: 1) CUBIC with Hybrid slow start leads to a low radio resource utilization; 2) BBR yields higher throughputs even when SINR is lower and/or hand-off happens; 3) BBR's bottle-neck link bandwidth estimation works well for various conditions (including hand-offs); and 4)BBR is a promising TCP Congestion Control candidate for performance enhancement proxies over mobile networks. ---- cheers, jamal
