RANDOM ACCESS RESPONSE RECEIVING Russian patent published in 2022 - IPC H04W74/08 

FIELD: communications.

SUBSTANCE: invention relates to the field of communications. To achieve the effect, the wireless device transmits the first preamble through the cell. The wireless device receives a downlink grant for a random access response. The wireless device determines that the random access response has not been successfully received. The wireless device determines, based on the unsuccessful reception and the cell time alignment timer, an uplink signal to transmit through the cell. The uplink signal is a second preamble or negative acknowledgment. The wireless device transmits an uplink signal.

EFFECT: invention provides the ability to avoid having to constantly trigger a retransmission of the second preamble as part of the MsgA.

15 cl, 54 dwg