Data transmission method and apparatus and storage medium
Embodiments of this application provide a data transmission method and apparatus and a storage medium. The method includes: After obtaining a first identifier and a second identifier that uniquely identify a first device, the first device scrambles, by using the first identifier, checked data obtained through CRC check. After performing channel coding on to-be-transmitted data and scrambled checked data, the first device scrambles, by using the second identifier, coded data obtained through channel coding, and finally sends scrambled data. In this way, after receiving the scrambled data, a second device may perform descrambling by using the second identifier, and then perform CRC check, to determine whether the received data is correct and determine the first identifier of the first device.
1. A data transmission method, applicable to a first device, and comprising:
performing a cyclic redundancy check (CRC) on to-be-transmitted data to obtain checked data;
scrambling the checked data based on a first identifier to obtain scrambled checked data;
performing channel coding on the scrambled checked data to obtain coded data;
scrambling the coded data based on a second identifier to obtain scrambled coded data, wherein a combination of the first identifier and the second identifier is used to identify the first device; and
sending the scrambled coded data.
2. The method according to claim 1 , wherein the method further comprises:
receiving configuration information from a second device, wherein the configuration information comprises the first identifier.
3. The method according to claim 2 , wherein the configuration information further comprises the second identifier.
4. The method according to claim 3 , wherein the configuration information further comprises a cell-specific configuration message or a user group-specific configuration message including the second identifier.
5. The method according to claim 3 , wherein the configuration information further comprises transmission parameter configuration information corresponding to the second identifier, and the transmission parameter configuration information comprises configuration information of a time-frequency resource and/or configuration information of a reference signal; and
sending the scrambled coded data comprises:
sending the scrambled coded data based on the transmission parameter configuration information corresponding to the second identifier.
6. The method according to claim 3 , wherein the sending the scrambled coded data comprises:
determining, based on the second identifier and a preset correspondence, transmission parameter configuration information corresponding to the second identifier, the correspondence being between an identifier used to scramble the coded data and the transmission parameter configuration information, and the transmission parameter configuration information comprises configuration information of a time-frequency resource and/or configuration information of a reference signal; and
sending the scrambled coded data based on the transmission parameter configuration information corresponding to the second identifier.
7. The method according to claim 2 , wherein the configuration information further comprises transmission parameter configuration information, and the transmission parameter configuration information comprises configuration information of a time-frequency resource and/or configuration information of a reference signal; and
the method further comprises:
determining the second identifier based on the transmission parameter configuration information; and
sending the scrambled coded data comprises:
sending the scrambled coded data based on the transmission parameter configuration information.
8. The method according to claim 7 , wherein the transmission parameter configuration information is obtained from a cell-specific configuration message or a user group-specific configuration message.
9. The method according to claim 1 , wherein scrambling the checked data based on the first identifier to obtain scrambled checked data comprises:
generating a scrambling sequence based on the first identifier, wherein a length of the scrambling sequence is greater than a sequence length of the first identifier; and
scrambling the checked data by using the scrambling sequence to obtain the scrambled checked data.
10. A data transmission apparatus, applicable to a first device, and
comprising a processing module and a transceiver module, wherein
the processing module is configured to: perform a cyclic redundancy check CRC on to-be-transmitted data to obtain checked data; scramble the checked data based on a first identifier to obtain scrambled checked data; perform channel coding on the to-be-transmitted data and the scrambled checked data to obtain coded data; and scramble the coded data based on a second identifier to obtain scrambled coded data, wherein a combination of the first identifier and the second identifier is used to identify the first device; and
the transceiver module is configured to send the scrambled coded data.
11. The apparatus according to claim 10 , wherein the transceiver module is further configured to receive configuration information from a second device, and the configuration information comprises the first identifier.
12. The apparatus according to claim 11 , wherein the configuration information further comprises the second identifier.
13. The apparatus according to claim 12 , wherein the configuration information further comprises a cell-specific configuration message or a user group-specific configuration message and the second identifier is obtained from the cell-specific configuration message or the user group-specific configuration message.
14. The apparatus according to claim 12 , wherein the configuration information further comprises transmission parameter configuration information corresponding to the second identifier, and the transmission parameter configuration information comprises configuration information of a time-frequency resource and/or configuration information of a reference signal; and
the transceiver module is further configured to send the scrambled coded data based on the transmission parameter configuration information corresponding to the second identifier.
15. The apparatus according to claim 12 , wherein
the transceiver module is further configured to: determine, based on the second identifier and a preset correspondence, transmission parameter configuration information corresponding to the second identifier; and send the scrambled coded data based on the transmission parameter configuration information corresponding to the second identifier,
the correspondence being between an identifier used to scramble the coded data and the transmission parameter configuration information, and the transmission parameter configuration information comprises configuration information of a time-frequency resource and/or configuration information of a reference signal.
16. The apparatus according to claim 11 , wherein the configuration information further comprises transmission parameter configuration information, and the transmission parameter configuration information comprises configuration information of a time-frequency resource and/or configuration information of a reference signal;
the processing module is further configured to determine the second identifier based on the transmission parameter configuration information; and
the transceiver module is configured to send the scrambled coded data based on the transmission parameter configuration information.
17. The apparatus according to claim 16 , wherein the transmission parameter configuration information is obtained from a cell-specific configuration message or a user group-specific configuration message.
18. The apparatus according to claim 10 , wherein the processing module is further configured to: generate a scrambling sequence based on the first identifier, wherein a length of the scrambling sequence is greater than a sequence length of the first identifier; and scramble the checked data by using the scrambling sequence to obtain the scrambled checked data.
19. A data transmission apparatus, applicable to a second device, and
comprising a transceiver module and a processing module, wherein
the transceiver module is configured to receive transmitted data from a first device; and
the processing module is configured to: descramble the transmitted data based on a second identifier to obtain descrambled transmitted data; perform channel decoding on the descrambled transmitted data to obtain decoded data; perform a cyclic redundancy check CRC on the decoded data to obtain checked data; determine, based on the checked data, whether the decoded data is correct; and determine a first identifier of the first device, wherein a combination of the first identifier and the second identifier is used to identify the first device.