What is HARQ in LTE?

HARQ stands for Hybrid Automatic Repeat Request . HARQ = ARQ + FEC (Forward Error Correction)/Soft Combining. ARQ refers to Automatic Repeat Request i.e. if sender doesn’t receive Acknowledgement (ACK) before timeout, the receiver discards the bad packet and sender shall re-transmits the packet.18 Eki 2018

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How many HARQ process in LTE?

The eNodeB will keep transmitting the same transport block using different RV values until the UE receives an error free transport block or the total retransmission limit occurs. In LTE the total number of HARQ processes which can be initiated at any given time is 8 .

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What is DwPTS?

DwPTS. The DwPTS is used for downlink synchronization . During the cell search procedure, the UE acquires the timing of the DwPTS by correlating with the SYNC-DL code transmitted in the DwPTS. The UE must identify which SYNC-DL sequence is used out of 32 SYNC-DL possible sequences.

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