HARQ RTT Timer
Home LTE NB-IoT 5G(NR-NSA) Hi guys today we are focus on HARQ RTT timer in DL as well as UL for LTE and NB-IOT. What is HARQ RTT Timer? This parameter specifies the min amount of TTIs before a DL HARQ retransmission is expected by the UE. (3GPP TS 36.321 V8.0.0) Simple way to understand: the HARQ Round Trip Time (RTT) timer is defined for UE to sleep during HARQ RTT. When decoding DL TB for one HARQ fails, UE can next retransmission TB after at least HARQ RTT sub frames. While HARQ RTT timer is running, UE need not monitor PDCCH. At HARQ RTT timer expiry, UE resumes PDCCH reception. Two type of HARQ RTT timer is there. HARQ RTT Timer : This parameter specifies the minimum number of subframe(s) before a DL HARQ retransmission is expected by the MAC entity. (3GPP TS 36.321 version 13.3.0 Release 13) UL...