Prior Generation of Transport Blocks to Expedite HARQ Retransmissions and Uplink Transmissions Improving Latency in LTE

The latency in Long Term Evolution (LTE) needs to be reduced to a darned low level to meet the expectation of 5G, which is the doorstep for future wireless communication. The latency is significantly affected by the delay in the physical layer processes to generate transport blocks (TBs). This delay is obvious when signaling precedes the generation of TBs. In this paper, the generation of TBs prior to signaling is proposed, using attributes, based on a prediction algorithm. The proposal applies to new transmissions in uplink as well as Hybrid Automatic Repeat Request (HARQ) retransmissions in any direction. An analysis shows that the proposed scheme typically reduces latency by 2 ms for the transfer of a TB.