Data Transmission Method and Apparatus

Abstract

A data transmission method and apparatus, the method including transmitting, by a radio access network device, downlink control information to a terminal device, where the downlink control information indicates a retransmission of a code block group, the code block group is one code block group of a plurality of code block groups of a transport block that the radio access network device transmits to the terminal device, the code block group has a plurality of code blocks with at least one code block was not transmitted correctly, and retransmitting the retransmission of the code block group to the terminal device. The downlink control information comprises identification information and indication information, the identification information identifies which code block group of the transport block is retransmitted, and the indication information indicates whether the code block group from a previous transmission is punctured or interfered.

What is claimed is: 
     
         1 . A method, comprising:
 transmitting, by a radio access network device, downlink control information to a terminal device, wherein the downlink control information indicates a retransmission of a code block group, wherein the code block group is one code block group of a plurality of code block groups of a transport block that the radio access network device transmits to the terminal device, wherein the code block group comprises a plurality of code blocks, and wherein at least one code block in the code block group was not transmitted correctly; and   retransmitting, by the radio access network device, the retransmission of the code block group to the terminal device;   wherein the downlink control information comprises identification information and indication information, wherein the identification information identifies which code block group of the transport block is retransmitted, and wherein the indication information indicates whether the code block group from a previous transmission is punctured or interfered.   
     
     
         2 . The method according to  claim 1 , wherein the identification information comprises a group index of the code block group. 
     
     
         3 . The method according to  claim 1 , wherein the indication information has two states, wherein a first state of the two states indicates that the code block group from the previous transmission is punctured or interfered, and wherein a second state of the two states indicates that the code block group from the previous transmission is not punctured or not interfered. 
     
     
         4 . The method of  claim 1 , further comprising:
 receiving, by the radio access network device, from the terminal device, acknowledgement information sent in response to the retransmitted code block group.   
     
     
         5 . The method of  claim 1 , wherein the at least one code block in the code block group that was not transmitted correctly was partially replaced or superimposed by data from another transmission flow that is different from a transmission flow that carries the transport block. 
     
     
         6 . The method according to  claim 1 , wherein a hybrid automatic repeat request (HARQ) process number used when the radio access network device transmits the transport block to the terminal device is the same as a HARQ process number used when the radio access network device transmits partial code blocks in the transport block to the terminal device. 
     
     
         7 . The method according to  claim 1 , wherein the indication information further indicates at least one other potential affected code block that is in a code block group other than the code block group from the previous transmission that was punctured or interfered. 
     
     
         8 . The method according to  claim 1 , wherein the least one other potential affected code block is identified based on position and without the least one other potential affected code block being identified as being punctured or interfered. 
     
     
         9 . A radio access network device, comprising:
 a processor;   a transceiver; and   a non-transitory memory unit storing program instructions for execution by the processor, the program instructions including instructions for:
 transmitting downlink control information to a terminal device, wherein the downlink control information indicates a retransmission of a code block group, wherein the code block group is one code block group of a plurality of code block groups of a transport block that the radio access network device transmits to the terminal device, wherein the code block group comprises a plurality of code blocks, and wherein at least one code block in the code block group was not transmitted correctly; and 
 retransmitting the retransmission of the code block group to the terminal device; 
   wherein the downlink control information comprises identification information and indication information, wherein the identification information identifies which code block group of the transport block is retransmitted, and wherein the indication information indicates whether the code block group from a previous transmission is punctured or interfered.   
     
     
         10 . The radio access network device according to  claim 9 , wherein the identification information comprises a group index of the code block group. 
     
     
         11 . The radio access network device according to  claim 9 , wherein the indication information has two states, wherein a first state of the two states indicates that the code block group from the previous transmission is punctured or interfered, and wherein a second state of the two states indicates that the code block group from the previous transmission is not punctured or not interfered. 
     
     
         12 . The radio access network device according to  claim 9 , wherein the program instructions further include instructions for:
 receiving, from the terminal device, acknowledgement information sent in response to the retransmitted code block group.   
     
     
         13 . The radio access network device according to  claim 9 , wherein the at least one code block in the code block group that was not transmitted correctly was partially replaced or superimposed by data from another transmission flow that is different from a transmission flow that carries the transport block. 
     
     
         14 . The radio access network device according to  claim 9 , wherein a hybrid automatic repeat request (HARQ) process number used when the radio access network device transmits the transport block to the terminal device is the same as a HARQ process number used when the radio access network device transmits partial code blocks in the transport block to the terminal device. 
     
     
         15 . A non-transitory storage medium storing computer program code for execution by a processor of a communication device, the computer program code including instructions for:
 transmitting downlink control information to a terminal device, wherein the downlink control information indicates a retransmission of a code block group, wherein the code block group is one code block group of a plurality of code block groups of a transport block that the communications device transmits to the terminal device, wherein the code block group comprises a plurality of code blocks, and wherein at least one code block in the code block group was not transmitted correctly; and   retransmitting the retransmission of the code block group to the terminal device;   wherein the downlink control information comprises identification information and indication information, wherein the identification information identifies which code block group of the transport block is retransmitted, and wherein the indication information indicates whether the code block group from a previous transmission is punctured or interfered.   
     
     
         16 . The non-transitory storage medium according to  claim 15 , wherein the identification information comprises a group index of the code block group. 
     
     
         17 . The non-transitory storage medium according to  claim 15 , wherein the indication information has two states, wherein a first state of the two states indicates that the code block group from the previous transmission is punctured or interfered, and wherein a second state of the two states indicates that the code block group from the previous transmission is not punctured or not interfered. 
     
     
         18 . The non-transitory storage medium according to  claim 15 , wherein the program code further includes instructions for:
 receiving, from the terminal device, acknowledgement information sent in response to the retransmitted code block group.   
     
     
         19 . The non-transitory storage medium according to  claim 15 , wherein the at least one code block in the code block group that was not transmitted correctly was partially replaced or superimposed by data from another transmission flow that is different from a transmission flow that carries the transport block. 
     
     
         20 . The non-transitory storage medium according to  claim 15 , wherein a hybrid automatic repeat request (HARQ) process number used when the radio access network device transmits the transport block to the terminal device is the same as a HARQ process number used when the communications device transmits partial code blocks in the transport block to the terminal device.