Data transmission method, terminal device, and network device

Abstract

Provided is a data transmission method, comprising: a terminal device receiving a first DCI and a second DCI; said first DCI being used for scheduling said terminal device to receive a first PDSCH which the first TTI is used to transmit on a target carrier, and said second DCI being used for scheduling said terminal device to receive a second PDSCH which the second TTI is used to transmit on a target carrier, the first TTI being smaller than the second TTI and the time resources of the first PDSCH and the second PDSCH at least partially overlapping; determining the priority relationship between the first DCI and the second DCI; according to said priority relationship, receiving the first PDSCH or the second PDSCH on the target carrier. In the method provided by the embodiments of the present invention, it is possible to dynamically support a plurality of TTIs on the same carrier and perform data transmission, and the terminal device determines the priority of the transmission channels on a carrier; the method satisfies the requirements of a delay and also takes compatibility with the current system into account.

1 . A method for receiving data, comprising:
 receiving, by a terminal device, first Downlink Control Information (DCI), wherein the first DCI is configured for scheduling a first Physical Downlink Shared Channel (PDSCH) transmitted by using a first Transmission Time Interval (TTI);   skipping demodulating, by the terminal device, the first PDSCH when the terminal device receives second DCI during reception of the first PDSCH by the terminal device, wherein the second DCI is configured for scheduling a second PDSCH transmitted by using a second TTI, and the first TTI is greater than the second TTI.   
     
     
         2 . The method according to  claim 1 , further comprising:
 sending, by the terminal device, feedback information, wherein the feedback information comprises feedback information corresponding to the first PDSCH and feedback information corresponding to the second PDSCH.   
     
     
         3 . The method according to  claim 2 , wherein the feedback information corresponding to the first PDSCH comprises Negative Acknowledgement (NACK) information. 
     
     
         4 . The method according to  claim 1 , wherein time resources of the first PDSCH and the second PDSCH at least partially overlap. 
     
     
         5 . A method for transmitting data, comprising:
 sending, by a network device, first Downlink Control Information (DCI), wherein the first DCI is configured for scheduling a first Physical Downlink Shared Channel (PDSCH) transmitted by using a first Transmission Time Interval (TTI);   sending, by the network device, second DCI during reception of the first PDSCH by a terminal device, to enable the terminal device to skip demodulating the first PDSCH, wherein the second DCI is configured for scheduling a second PDSCH transmitted by using a second TTI, and the first TTI is greater than the second TTI.   
     
     
         6 . The method according to  claim 5 , further comprising:
 receiving, by the network device, feedback information, wherein the feedback information comprises feedback information corresponding to the first PDSCH and feedback information corresponding to the second PDSCH.   
     
     
         7 . The method according to  claim 6 , wherein the feedback information corresponding to the first PDSCH comprises Negative Acknowledgement (NACK) information. 
     
     
         8 . The method according to  claim 5 , wherein time resources of the first PDSCH and the second PDSCH at least partially overlap. 
     
     
         9 . A terminal device, comprising: a memory, a processor, and a computer program stored on the memory and capable of running on the processor, wherein the computer program, when executed by the processor, cause the processor to execute operations comprising:
 receiving first Downlink Control Information (DCI), wherein the first DCI is configured for scheduling a first Physical Downlink Shared Channel (PDSCH) transmitted by using a first Transmission Time Interval (TTI);   skipping demodulating the first PDSCH when the terminal device receives second DCI during reception of the first PDSCH by the terminal device, wherein the second DCI is configured for scheduling a second PDSCH transmitted by using a second TTI, and the first TTI is greater than the second TTI.   
     
     
         10 . The terminal device according to  claim 9 , wherein the processor is specifically configured to send feedback information, wherein the feedback information comprises feedback information corresponding to the first PDSCH and feedback information corresponding to the second PDSCH. 
     
     
         11 . The terminal device according to  claim 10 , wherein the feedback information corresponding to the first PDSCH comprises Negative Acknowledgement (NACK) information. 
     
     
         12 . The terminal device according to  claim 9 , wherein time resources of the first PDSCH and the second PDSCH at least partially overlap. 
     
     
         13 . A network device, comprising: a memory, a processor, and a computer program stored on the memory and capable of running on the processor, wherein the computer program, when executed by the processor, cause the processor to execute operations comprising:
 sending first Downlink Control Information (DCI), wherein the first DCI is configured for scheduling a first Physical Downlink Shared Channel (PDSCH) transmitted by using a first Transmission Time Interval (TTI);   sending second DCI during reception of the first PDSCH by a terminal device, to enable the terminal device to skip demodulating the first PDSCH, wherein the second DCI is configured for scheduling a second PDSCH transmitted by using a second TTI on the target carrier, and the first TTI is greater than the second TTI.   
     
     
         14 . The network device according to  claim 13 , wherein the processor is configured to receive feedback information, the feedback information comprises feedback information corresponding to the first PDSCH and feedback information corresponding to the second PDSCH. 
     
     
         15 . The network device according to  claim 14 , wherein the feedback information corresponding to the first PDSCH comprises Negative Acknowledgement (NACK) information. 
     
     
         16 . The network device according to  claim 13 , wherein time resources of the first PDSCH and the second PDSCH at least partially overlap.