Laurence Krpoun

Hi, I have been doing some tests with open lte running with USRP B210. When my phone connects to the base station I get a lot of underrun (more or less depending on the situation). I have an i7 laptop with Ubuntu 16.10 on it. I have applied all the configuration changes recommended in this forum and I am still getting underrun. They are disturbing my tests so I would like to get rid of them. I am wondering where are these underrun from exactly? Is it from the board, from the USB driver (latency)...