COMMUNICATION METHOD AND NETWORK DEVICE AND TERMINAL DEVICE THEREOF
FIG2 is a schematic diagram of resource preemption according to an embodiment of this application
An eMBB service has a relatively large data volume and a relatively high transmission rate. Therefore, a time scheduling unit with relatively long duration is usually used for data transmission, to improve transmission efficiency. For example, a slot corresponding to a subcarrier spacing of 15 kHz is used, and corresponding duration is 0.5 ms. Because of data burstiness of the URLLC service, to improve the system resource utilization, the base station usually does not reserve resources for downlink data transmission of the URLLC service, but allocates resources to the URLLC service by preempting (preemption) resources of the eMBB service. As shown in FIG2, herein, preemption means that the base station selects some or all of allocated time-frequency resources that are used to transmit eMBB service data, to transmit URLLC service data, and the base station does not send eMBB service data on a time-frequency resource used to transmit URLLC service data.
schematic diagram
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terminal device
2
Table
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terminal device
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base station
['13. A terminal device, comprising a communications module, wherein the communications module is configured to receive downlink control information, wherein the downlink control information is used to indicate K times of transmission of a first transport block, K is an integer greater than 1, and the K times of transmission meet at least one of the following conditions: sizes of frequency-domain resources occupied by at least two times of transmission during the K times of transmission are different, and sizes of time-domain resources occupied by at least two times of transmission during the K times of transmission are different; and the communications module is further configured to receive data, transmitted in the K times of transmission, of the first transport block based on the downlink control information.']