Patent ID: 8238247
Filing Date: 2012-08-07
Classification: H04L,H04W

Abstract:
1. A system for proactive repeat transmission of data units sent using an unreliable transmission medium, comprising: sending equipment adapted to receive a proactive repeat transmission request list and schedule the repeat transmission of data units specified in each proactive repeat transmission request list after data units associated with the proactive repeat transmission request list have been sent using the unreliable transmission medium; and receiving equipment adapted to analyze data units received via a downlink channel used by the sending equipment to predict a condition of that downlink channel during a next transmission interval, and further adapted to construct the proactive repeat transmission request lists using the predicted condition, and to send a proactive repeat transmission request list to the sending equipment via an uplink channel before the data units associated with the proactive repeat transmission request list have been sent, wherein the receiving equipment further comprises a channel estimation module that receives output from a fast Fourier transform of data units received from the sending equipment via the downlink channel and computes time domain channel state information using the fast Fourier transform output.