A method for receiving downlink control information, comprising: sending first data to a network device in a first time unit, wherein the first data is uplink transmission without uplink grant signaling; receiving, in a second time unit, downlink control information from the network device, wherein the downlink control information comprises resource allocation information and a first radio network temporary identifier, RNTI, corresponding to the downlink control information; determining, based on the first RNTI, that the downlink control information is for the uplink transmission without uplink grant signaling; retransmitting a part or all of the first data on a resource corresponding to the resource allocation information, or sending second data on a resource corresponding to the resource allocation information, wherein the second data and the first data are data of a same hybrid automatic repeat request, HARQ, process, and the method being characterized by that: the downlink control information further comprises a time offset indication, and the time offset indication is used to indicate a time offset between data that the downlink control information is for and the downlink control information; and after the determining, based on the first RNTI, that the downlink control information is for the uplink transmission without uplink grant signaling and before the retransmitting a part or all of the first data on a resource corresponding to the resource allocation information, the method further comprises: determining, based on the time offset indication and the second time unit, that the downlink control information is for the first data sent in the first time unit. sending first data to a network device in a first time unit, wherein the first data is uplink transmission without uplink grant signaling; receiving, in a second time unit, downlink control information from the network device, wherein the downlink control information comprises resource allocation information and a first radio network temporary identifier, RNTI, corresponding to the downlink control information; determining, based on the first RNTI, that the downlink control information is for the uplink transmission without uplink grant signaling; retransmitting a part or all of the first data on a resource corresponding to the resource allocation information, or sending second data on a resource corresponding to the resource allocation information, wherein the second data and the first data are data of a same hybrid automatic repeat request, HARQ, process, and the method being characterized by that: the downlink control information further comprises a time offset indication, and the time offset indication is used to indicate a time offset between data that the downlink control information is for and the downlink control information; and after the determining, based on the first RNTI, that the downlink control information is for the uplink transmission without uplink grant signaling and before the retransmitting a part or all of the first data on a resource corresponding to the resource allocation information, the method further comprises: determining, based on the time offset indication and the second time unit, that the downlink control information is for the first data sent in the first time unit. the downlink control information further comprises a time offset indication, and the time offset indication is used to indicate a time offset between data that the downlink control information is for and the downlink control information; and after the determining, based on the first RNTI, that the downlink control information is for the uplink transmission without uplink grant signaling and before the retransmitting a part or all of the first data on a resource corresponding to the resource allocation information, the method further comprises: determining, based on the time offset indication and the second time unit, that the downlink control information is for the first data sent in the first time unit.