Data transmission method, network device, and terminal
Embodiments of this application provide a data transmission method, a network device, and a terminal. When the method is performed by the terminal, the method includes: obtaining, a time-frequency resource used to transmit uplink data, where the time-frequency resource is at least one time-frequency resource block selected from a plurality of time-frequency resource blocks; each of the time-frequency resource blocks is corresponding to one piece of configuration information; and transmitting, the uplink data on the at least one selected time-frequency resource block based on configuration information of the at least one selected time-frequency resource block. The terminal may select a relatively narrow bandwidth to perform uplink transmission, to increase a transmit power of the terminal. In addition, the terminal performs the uplink transmission based on the corresponding configuration information, to further increase a transmit power. The network device perform demodulation, to improve demodulation efficiency and avoid generating a processing latency.
1. A data transmission method, wherein the method comprises:
obtaining, by a terminal, a time-frequency resource used to transmit uplink data, wherein the time-frequency resource is at least one time-frequency resource block selected from a plurality of time-frequency resource blocks, each of the plurality of time-frequency resource blocks is corresponding to one piece of configuration information, and the configuration information comprises at least identification information of the corresponding time-frequency resource block used to transmit uplink data;
selecting the at least one time-frequency resource block from the plurality of time-frequency resource blocks based on a previous corresponding statistical success rate of transmission; and
transmitting, by the terminal, the uplink data on the at least one selected time-frequency resource block based on configuration information of the at least one selected time-frequency resource block, wherein the identification information is a start position or an index number of the corresponding time-frequency resource block or the identification information corresponds to one or more groups of terminals or one or more sub-bands, wherein each of the plurality of time-frequency resource blocks occupies a same bandwidth, or at least two of the plurality of time-frequency resource blocks occupy different bandwidths.
2. The data transmission method according to claim 1 , wherein each of the plurality of time-frequency resource blocks occupies a same quantity of symbols in time domain, or at least two time-frequency resource blocks occupy different quantities of symbols in time domain.
3. The data transmission method according to claim 1 , wherein that the terminal selects the at least one time-frequency resource block from the plurality of time-frequency resource blocks comprises:
randomly selecting, by the terminal, the at least one time-frequency resource block from the plurality of time-frequency resource blocks;
selecting, by the terminal, the at least one time-frequency resource block from the plurality of time-frequency resource blocks based on a measurement result of channel quality; or
selecting, by the terminal, the at least one time-frequency resource block from the plurality of time-frequency resource blocks based on a power requirement.
4. A terminal, comprising:
a processor, configured to obtain a time-frequency resource used to transmit uplink data, wherein the time-frequency resource is at least one time-frequency resource block selected from a plurality of time-frequency resource blocks, each of the plurality of time-frequency resource blocks is corresponding to one piece of configuration information, and the configuration information comprises at least identification information of the corresponding time-frequency resource block used to transmit uplink data, and
select the at least one time-frequency resource block from the plurality of time-frequency resource blocks based on a previous corresponding statistical success rate of transmission; and
a transceiver, configured to transmit the uplink data on the at least one selected time-frequency resource block based on configuration information of the at least one time-frequency resource block selected by the processor, wherein the identification information is a start position or an index number of the corresponding time-frequency resource block or the identification information corresponds to one or more groups of terminals or one or more sub-bands, wherein each of the plurality of time-frequency resource blocks occupies a same bandwidth, or at least two of the plurality of time-frequency resource blocks occupy different bandwidths.
5. The terminal according to claim 4 , wherein each of the plurality of time-frequency resource blocks occupies a same quantity of symbols in time domain, or at least two time-frequency resource blocks occupy different quantities of symbols in time domain.
6. The terminal according to claim 4 , wherein the processor is configured to: randomly select the at least one time-frequency resource block from the plurality of time-frequency resource blocks; select the at least one time-frequency resource block from the plurality of time-frequency resource blocks based on a measurement result of channel quality; or select the at least one time-frequency resource block from the plurality of time-frequency resource blocks based on a power requirement.
7. The terminal according to claim 4 , wherein when transmitting the uplink data by using the at least one selected time-frequency resource block, the transceiver notifies a network device of the identification information of the at least one selected time-frequency resource block.
8. The terminal according to claim 4 , wherein each configuration information further comprises a power control parameter for a corresponding one of the plurality of time-frequency resource blocks, and wherein the power control parameter indicates a power level used to transmit uplink data.
9. The terminal according to claim 4 , wherein each configuration information further comprises a transmission time interval bundling size (TTI bundling size) indication or a repetition size indication for a corresponding one of a plurality of time-frequency resource blocks.
10. A chip, comprising at least one processor and an interface, wherein
the processor is configured to obtain a time-frequency resource used to transmit uplink data, wherein the time-frequency resource comprises a plurality of time-frequency resource blocks, the information about the time-frequency resource comprises configuration information corresponding to each time-frequency resource block, and the configuration information comprises at least identification information of the corresponding time-frequency resource block used to transmit uplink data; and
the processor is further configured to: when the uplink data needs to be sent, select at least one time-frequency resource block from the plurality of time-frequency resource blocks based on a previous corresponding statistical success rate of transmission, and provide the at least one selected time-frequency resource block for a transceiver through the interface, wherein the identification information is a start position or an index number of the corresponding time-frequency resource block or the identification information corresponds to one or more groups of terminals or one or more sub-bands, wherein each of the plurality of time-frequency resource blocks occupies a same bandwidth, or at least two of the plurality of time-frequency resource blocks occupy different bandwidths.
11. The chip according to claim 10 , wherein each of the plurality of time-frequency resource blocks occupies a same quantity of symbols in time domain, or at least two time-frequency resource blocks occupy different quantities of symbols in time domain.
12. The chip according to claim 10 , wherein the processor is configured to: randomly select the at least one time-frequency resource block from the plurality of time-frequency resource blocks; select the at least one time-frequency resource block from the plurality of time-frequency resource blocks based on a measurement result of channel quality; or select the at least one time-frequency resource block from the plurality of time-frequency resource blocks based on a power requirement.
13. The chip according to claim 10 , wherein the processor further configured to cause the transceiver to notify a network device of the identification information of the at least one selected time-frequency resource block.
14. The chip according to claim 10 , wherein each configuration information further comprises a power control parameter for a corresponding one of the plurality of time-frequency resource blocks, and wherein the power control parameter indicates a power level used to transmit uplink data.