Methods for Enhanced HARQ Mechanism

摘要

Apparatus and methods are provided to enhance HARQ mechanism. The UE repeatedly transmits a data block with a first repetition number and retransmits the data block with a second repetition number. In one embodiment, the first and the second repetition number value are explicitly included in an uplink grant message. In another embodiment, the UE obtains a repetition number value by looking up a repetition number table indexed by the repetition number indicator, which is included in an uplink grant message for the first repetition number and included in a HARQ message for the second repetition number. In yet another embodiment, the UE determines a coverage enhancement degree value, a data block size value and an available transport resource block size. The UE obtains a repetition number by table-look-up based on the coverage-enhancement degree value, the data block size, and the transport resource block size.

主权项

1. A method comprising:
determining a first repetition number by a user equipment (UE) in a wireless system; repeatedly transmitting a data block by the first repetition number; receiving a HARQ message that indicates a negative acknowledgement; determining a second repetition number for a data retransmission of the data block, wherein the second repetition number is different from the first repetition number; and repeatedly retransmitting the data block by the second repetition number.