Grant-free uplink transmission method and apparatus
Embodiments of the present disclosure relate to a grant-free uplink transmission method and apparatus. The method includes: determining, based on received configuration information, a target grant-free transmission area and a target air interface transmission parameter corresponding to the target grant-free transmission area, where the target grant-free transmission area is an air interface time-frequency resource formed by using a specified time range and frequency range, and the configuration information includes at least one grant-free transmission area and an air interface transmission parameter corresponding to each grant-free transmission area; and sending uplink data to a base station based on the target grant-free transmission area and the target air interface transmission parameter. In this application, it can be provided that the base station can correctly receive the uplink data.
1. A grant-free uplink transmission method, comprising:
receiving configuration information;
determining, based on the configuration information, a target grant-free transmission area and a target air interface transmission parameter corresponding to the target grant-free transmission area, wherein the target grant-free transmission area is an air interface time-frequency resource formed by a time range and a frequency range, and wherein the configuration information comprises at least one grant-free transmission area and an air interface transmission parameter corresponding to each grant-free transmission area, wherein the air interface transmission parameter comprises a basic parameter and an extended parameter,
wherein the basic parameter comprises an uplink waveform that comprises a single-carrier waveform or a multi-carrier waveform, wherein the single-carrier waveform comprises discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM), and wherein the multi-carrier waveform comprises cyclic prefix orthogonal frequency division multiplexing (CP-OFDM); and
wherein the extended parameter includes dynamic parameters comprising at least one of: numerology, a maximum transmit power, or a radio frame structure; and
sending uplink data to a base station based on the target grant-free transmission area and the target air interface transmission parameter.
2. The method according to claim 1 , wherein the determining, based on the configuration information, the target grant-free transmission area and the target air interface transmission parameter corresponding to the target grant-free transmission area comprises:
determining, based on a service feature of the uplink data, the target grant-free transmission area and the target air interface transmission parameter from the at least one grant-free transmission area and the air interface transmission parameter corresponding to each grant-free transmission area; or
determining, based on a size of the uplink data, the target grant-free transmission area and the target air interface transmission parameter from the at least one grant-free transmission area and the air interface transmission parameter corresponding to each grant-free transmission area; or
determining, based on a buffer status of the uplink data, the target grant-free transmission area and the target air interface transmission parameter from the at least one grant-free transmission area and the air interface transmission parameter corresponding to each grant-free transmission area; or
determining, based on channel state information of each grant-free transmission area, the target grant-free transmission area and the target air interface transmission parameter from the at least one grant-free transmission area and the air interface transmission parameter corresponding to each grant-free transmission area.
3. The method according to claim 1 , wherein the target air interface transmission parameter further comprises a channel coding scheme.
4. The method according to claim 3 , wherein the channel coding scheme comprises LDPC (low-density parity-check) or polar code.
5. The method according to claim 1 , wherein the target air interface transmission parameter further comprises a radio frame structure.
6. The method according to claim 1 , wherein the target air interface transmission parameter further comprises a multiple access manner.
7. The method according to claim 6 , wherein the multiple access manner comprises an orthogonal frequency division multiple access (OFDMA) manner.
8. The method according to claim 6 , wherein the multiple access manner comprises a non-orthogonal multiple access manner.
9. The method according to claim 8 , wherein the multiple access manner comprises the non-orthogonal multiple access manner, the target air interface transmission parameter further comprises at least one of the following information: a signature matrix, a spread spectrum sequence, or a power domain superposition pattern.
10. The method according to claim 9 , wherein the target air interface transmission parameter further comprises a codebook and a pilot sequence.
11. The method according to claim 1 , wherein the configuration information is carried in at least one of the following information: system information, radio resource control (RRC) signaling, or physical layer control information.
12. The method according to claim 11 , wherein the physical layer control information comprises a group common physical downlink control channel.
13. The method according to claim 1 , wherein the numerology includes a subcarrier spacing and a cyclic prefix length.
14. A grant-free uplink transmission apparatus, comprising one or more processors, wherein the one or more processors are coupled to one or more memories storing program instructions for execution by the one or more processors to cause the apparatus to:
receive configuration information;
determine, based on the configuration information, a target grant-free transmission area and a target air interface transmission parameter corresponding to the target grant-free transmission area, wherein the target grant-free transmission area is an air interface time-frequency resource formed by a time range and a frequency range, and wherein the configuration information comprises at least one grant-free transmission area and an air interface transmission parameter corresponding to each grant-free transmission area, wherein the air interface transmission parameter comprises a basic parameter and an extended parameter,
wherein the basic parameter comprises an uplink waveform that comprises a single-carrier waveform or a multi-carrier waveform, wherein the single-carrier waveform comprises discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM), and wherein the multi-carrier waveform comprises cyclic prefix orthogonal frequency division multiplexing (CP-OFDM); and
wherein the extended parameter includes dynamic parameters comprising at least one of: numerology, a maximum transmit power, or a radio frame structure; and
send uplink data to a base station based on the target grant-free transmission area and the target air interface transmission parameter.
15. The apparatus according to claim 14 , wherein the determining, based on the configuration information, the target grant-free transmission area and the target air interface transmission parameter corresponding to the target grant-free transmission area comprises:
determining, based on a service feature of the uplink data, the target grant-free transmission area and the target air interface transmission parameter from the at least one grant-free transmission area and the air interface transmission parameter corresponding to each grant-free transmission area; or
determining, based on a size of the uplink data, the target grant-free transmission area and the target air interface transmission parameter from the at least one grant-free transmission area and the air interface transmission parameter corresponding to each grant-free transmission area; or
determining, based on a buffer status of the uplink data, the target grant-free transmission area and the target air interface transmission parameter from the at least one grant-free transmission area and the air interface transmission parameter corresponding to each grant-free transmission area; or
determining, based on channel state information of each grant-free transmission area, the target grant-free transmission area and the target air interface transmission parameter from the at least one grant-free transmission area and the air interface transmission parameter corresponding to each grant-free transmission area.
16. The apparatus according to claim 14 , wherein the target air interface transmission parameter further comprises a channel coding scheme.
17. The apparatus according to claim 14 , wherein the target air interface transmission parameter further comprises a multiple access manner, and the multiple access manner comprises an orthogonal frequency division multiple access (OFDMA) manner or a non-orthogonal multiple access manner.
18. The apparatus according to claim 14 , wherein the numerology includes a subcarrier spacing and a cyclic prefix length.
19. A grant-free uplink transmission apparatus, comprising one or more processors, wherein the one or more processors are coupled to one or more memories storing program instructions for execution by the one or more processors to cause the apparatus to:
determine configuration information, wherein the configuration information comprises at least one grant-free transmission area and an air interface transmission parameter corresponding to each grant-free transmission area, wherein the air interface transmission parameter comprises a basic parameter and an extended parameter,
wherein the basic parameter comprises an uplink waveform that comprises a single-carrier waveform or a multi-carrier waveform, wherein the single-carrier waveform comprises discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM), and wherein the multi-carrier waveform comprises cyclic prefix orthogonal frequency division multiplexing (CP-OFDM); and
wherein the extended parameter includes dynamic parameters comprising at least one of: numerology, a maximum transmit power, or a radio frame structure; and
receive, based on the at least one grant-free transmission area and the air interface transmission parameter corresponding to each grant-free transmission area, uplink data from a terminal device.
20. The apparatus according to claim 19 , wherein the numerology includes a subcarrier spacing and a cyclic prefix length.