Data transmission method, network device, and terminal device
Embodiments provide a data transmission method, a network device, and a terminal device. For achieving this, indication signaling indicating data transmission of one transport block can be sent. The indication signaling carries a status value indicating a quantity of coding block groups in the transport block. The status value further indicates at least one coding block group in the data transmission. The status value is represented by using a maximum of K+1 bits, and K is a maximum value of the quantity of coding block groups that can be included in the transport block. In various embodiments, a network device jointly indicates, by using the status value, the quantity of coding block groups in the transport block and the at least one coding block group included in the data transmission, so that a quantity of bits occupied by the indication signaling is reduced, thereby reducing signaling overheads.
1. A data transmission method, comprising:
sending indication signaling, wherein the indication signaling indicates data transmission of one transport block, and the indication signaling carries a status value, wherein the indication signaling indicates a quantity of coding block groups in the transport block, the status value further indicates at least one coding block group in the data transmission, and the status value is represented by using a maximum of K+1 bits, K being a maximum value of the quantity of coding block groups that can be in the transport block; and
sending the at least one coding block group.
2. The method according to claim 1 , wherein the status value is determined based on the quantity of coding block groups in the transport block and the at least one coding block group in the data transmission.
3. The method according to claim 1 , wherein the status value, the quantity of coding block groups in the transport block, and a coding block group comprised in the data transmission meet the following relational expression:
X=Y +(2 M −a M ), wherein
0≤a M ≤2+M, 1≤M≤K, a M is an integer, X represents decimal notation of the status value, Y represents decimal notation of a location index value, the location index value indicates a location of the at least one coding block group in the data transmission in the transport block, and M represents the quantity of coding block groups in the transport block.
4. The method according to claim 1 , wherein the status value, the quantity of coding block groups in the transport block, and a coding block group in the data transmission meet the following relational expression:
X=Y +(2 M −a M ), wherein
0≤a M ≤2+M, a M is a constant and is an integer, 1≤M≤K, X represents decimal notation of the status value, Y represents decimal notation of a location index value, the location index value is used to indicate a location of the at least one coding block group comprised in the data transmission in the transport block, and M represents the quantity of coding block groups comprised in the transport block.
5. The method according to claim 1 , wherein the method further comprises:
receiving feedback information sent by a terminal device, wherein the feedback information indicates whether the terminal device receives at least one coding block group in the transport block, and the feedback information is determined by the terminal device based on the status value.
6. The method according to claim 5 , wherein the feedback information comprises one bit, wherein the one bit indicates whether the terminal device correctly receives the at least one coding block group in the transport block.
7. A network device, comprising:
a sending module, configured to send indication signaling, wherein the indication signaling indicates data transmission of one transport block, and the indication signaling carries a status value, wherein the status value indicates a quantity of coding block groups in the transport block, the status value further indicates at least one coding block group in the data transmission, the status value is represented by using a maximum of N+1 bits, N being a maximum value of the quantity of coding block groups that can be in the transport block, wherein
the sending module is further configured to send the at least one coding block group.
8. The network device according to claim 7 , wherein the status value is determined based on the quantity of coding block groups in the transport block and the at least one coding block group comprised in the data transmission.
9. The network device according to claim 7 , wherein the status value, the quantity of coding block groups in the transport block, and a coding block group in the data transmission meet the following relational expression:
X=Y +(2 M −a M ), wherein
0≤a M ≤2+M, 1≤M≤N, a M is an integer, X represents decimal notation of the status value, Y represents decimal notation of a location index value, the location index value indicates a location of the at least one coding block group in the data transmission in the transport block, and M represents the quantity of coding block groups in the transport block.
10. The network device according to claim 7 , wherein the status value, the quantity of coding block groups in the transport block, and a coding block group in the data transmission meet the following relational expression:
X=Y +(2 M −a M ), wherein
0≤a M ≤2, 1≤M≤K, a M is a constant and is an integer, X represents decimal notation of the status value, Y represents decimal notation of a location index value, the location index value indicates a location of the at least one coding block group in the data transmission in the transport block, and M represents the quantity of coding block groups comprised in the transport block.
11. The network device according to claim 7 , wherein the network device further comprises:
a receiving module, configured to receive feedback information sent by a terminal device, wherein the feedback information indicates whether the terminal device correctly receives at least one coding block group in the transport block, and the feedback information is determined by the terminal device based on the status value.
12. The network device according to claim 11 , wherein the feedback information comprises one bit, and the one bit indicates whether the terminal device correctly receives the at least one coding block group in the transport block.
13. A terminal device, comprising:
a receiving module, configured to receive indication signaling, wherein the indication signaling indicates data transmission of one transport block, and the indication signaling carries a status value, wherein the status value indicates a quantity of coding block groups in the transport block, the status value further indicates at least one coding block group in the data transmission, the status value is represented by using a maximum of N+1 bits, N being a maximum value of the quantity, indicated by the indication signaling, of coding block groups that can be in the transport block, wherein
the receiving module is further configured to receive the at least one coding block group.
14. The terminal device according to claim 13 , wherein the terminal device further comprises:
a processing module, configured to determine, based on the status value, the quantity of coding block groups comprised in the transport block.
15. The terminal device according to claim 13 , wherein the processing module is configured to:
determine M=max {n|X≥2 n −a M } based on X, wherein 1≤M≤N, a M is an integer, X represents decimal notation of the status value, and M represents the quantity of coding block groups comprised in the transport block.
16. The terminal device according to claim 13 , wherein the processing module is further configured to determine, based on the status value, at least one coding block group comprised in the transport block.
17. The terminal device according to claim 13 , wherein the processing module is In some embodiments configured to:
determine Y=X−(2 M −a M ) based on X and M, wherein 0≤a M ≤2+M, a M is an integer, X represents the decimal notation of the status value, Y represents decimal notation of a location index value, the location index value is used to indicate a location of the at least one coding block group in the data transmission in the transport block, and M represents the quantity of coding block groups comprised in the transport block.
18. The terminal device according to claim 13 , wherein the processing module is configured to:
determine Y=X−(2 M −a M ) based on X and M, wherein 0≤a M ≤2+M, a M is a constant and is an integer, X represents the decimal notation of the status value, Y represents decimal notation of a location index value, the location index value is used to indicate a location of the at least one coding block group comprised in the data transmission in the transport block, and M represents the quantity of coding block groups comprised in the transport block.
19. The terminal device according to claim 13 , wherein the processing module is further configured to determine feedback information based on the location index value and the status value, wherein the feedback information indicates whether the terminal device receives the at least one coding block group in the transport block; and
the terminal device further comprises:
a sending module, configured to send the feedback information to a network device.
20. The terminal device according to claim 19 , wherein the feedback information comprises one bit, and the one bit indicates whether the terminal device receives the at least one coding block group in the transport block.