Delay between feedback and scheduling decision in LTE implemented in GNURadio

Hi,

I would like to ask if anyone knows how long is the delay between a
feedback and a scheduling decision in implementation of LTE on USRP
boards
using GNURadio?

I am trying to use OpenLTE source codes but since it is only downlink I
need to add a feedback (power gain or SINR) and then transmitting USRP
board does a resource block (RB) allocation. However the constraint is
that
the delay can not exceed than 1-2 ms.

Does anyone have any idea about this? Do you think this requirement will
be
met if I add the feedback?

Thanks.