(7) Grant free transmission may be as follows: A network side device specifies, for a terminal, some uplink transmission time-frequency resources dedicated to uplink signal transmission that does not require a grant.
(8) Grant free transmission may be as follows: A terminal requests a network side device to schedule an uplink transmission time-frequency resource, and after performing uplink transmission by using the uplink transmission time-frequency resource, the terminal retains the uplink transmission time-frequency resource; and then when the terminal needs to perform uplink transmission, the terminal directly uses the uplink transmission time-frequency resource, and does not need to request, each time the terminal performs uplink transmission, the network side device again to schedule an uplink transmission time-frequency resource.
The data may include service data or signaling data.
The blind detection may be understood as a meaning that data likely to arrive is detected without a prediction on whether data is to arrive. Alternatively, the blind detection may be understood as detection performed without an explicit signaling instruction.
The transmission resource may include but is not limited to one or a combination of more of the following resources:
a time domain resource, such as a radio frame, a subframe, and a symbol;
a frequency domain resource, such as a subcarrier and a resource block;
a space domain resource, such as a transmit antenna and a beam;
a code domain resource, such as a sparse code multiple access (English full name: Sparse Code Multiple Access, SCMA for short) codebook, a low density signature (English full name: Low Density Signature, LDS for short) sequence, or CDMA code; and