Communication method and communication apparatus employing dynamic spectrum resource sharing
This application provides a communication method and a communication apparatus. The communication method includes: receiving first downlink control information DCI, the first DCI indicating a first time-frequency resource; determining a second time-frequency resource, where the second time-frequency resource is used for uplink transmission, and the first time-frequency resource overlaps the second time-frequency resource; and when the uplink transmission meets a first condition, transmitting uplink information on the second time-frequency resource.
1 . A communication method, comprising:
receiving first downlink control information (DCI), the first DCI indicating a first uplink time-frequency resource, the first uplink time-frequency resource comprising a first group of time-frequency units, wherein a time-frequency unit of the first group of time-frequency units corresponds to a time domain start position and a time domain length in a time domain, and corresponds to a frequency domain start position and a frequency domain length in a frequency domain;
determining a second uplink time-frequency resource for uplink transmission, the first uplink time-frequency resource overlaps the second uplink time-frequency resource in a time domain or overlaps in the time domain and in a frequency domain; and
transmitting uplink information on the second uplink time-frequency resource when the uplink transmission meets a first condition, wherein the uplink transmission is scheduled using a second DCI, the uplink transmission is a dynamically scheduled uplink data channel and the second DCI is used to schedule the uplink data channel, or the uplink transmission is a dynamically scheduled uplink sounding reference signal and the second DCI is used to schedule the uplink sounding reference signal, the first condition is that a first DCI sending moment of the first DCI is not later than a second DCI sending moment of the second DCI, the first DCI is multicasting downlink control information comprising group-common downlink control information (GC-DCI).
2 . The method according to claim 1 , wherein the method further comprises:
skipping transmitting the uplink information on an overlapping time-frequency resource between the second uplink time-frequency resource and the first uplink time-frequency resource when the uplink transmission does not meet the first condition.
3 . The method according to claim 1 , wherein the first uplink time-frequency resource is a preempted time-frequency resource.
4 . The method according to claim 1 , wherein:
the first DCI sending moment is a first DCI first symbol of a downlink control channel carrying the first DCI; and
the second DCI sending moment is a second DCI first symbol of a downlink control channel carrying the second DCI.
5 . A network device, comprising:
a memory storing instructions; and
at least one processor in communication with the memory, the at least one processor configured, upon execution of the instructions, to perform the following steps:
send first downlink control information (DCI) to a terminal, the first DCI indicating a first uplink time-frequency resource and indicating the terminal stop transmitting on the first uplink time-frequency resource, the first uplink time-frequency resource comprising a first group of time-frequency units, wherein a time-frequency unit of the first group of time-frequency units corresponds to a time domain start position and a time domain length in a time domain, and corresponds to a frequency domain start position and a frequency domain length in a frequency domain; and
receive uplink information on a second uplink time-frequency resource from the terminal when an uplink transmission meets a first condition, the first uplink time-frequency resource overlaps the second uplink time-frequency resource in a time domain or overlaps in the time domain and in a frequency domain, wherein the uplink transmission is scheduled using a second DCI, the uplink transmission is a dynamically scheduled uplink data channel and the second DCI is used to schedule the uplink data channel, or the uplink transmission is a dynamically scheduled uplink sounding reference signal and the second DCI is used to schedule the uplink sounding reference signal, the first condition is that a first DCI sending moment of the first DCI is not later than a second DCI sending moment of the second DCI, the first DCI is multicasting downlink control information comprising group-common downlink control information (GC-DCI).
6 . The network device according to claim 5 , wherein the instructions, when executed by the at least one processor, further cause the network device to:
skip receiving the uplink information on an overlapping time-frequency resource between the second uplink time-frequency resource and the first uplink time-frequency resource when the uplink transmission does not meet the first condition.
7 . The network device according to claim 5 , wherein the first uplink time-frequency resource is a preempted time-frequency resource.
8 . The network device according to claim 5 , wherein:
the first DCI sending moment is a first DCI first symbol of a downlink control channel carrying the first DCI; and
the second DCI sending moment is a second DCI first symbol of a downlink control channel carrying the second DCI.
9 . A communication apparatus, comprising:
a memory storing instructions; and
at least one processor in communication with the memory, the at least one processor configured, upon execution of the instructions, to perform the following steps:
receive first downlink control information (DCI), the first DCI indicating a first uplink time-frequency resource, the first uplink time-frequency resource comprising a first group of time-frequency units, wherein a time-frequency unit of the first group of time-frequency units corresponds to a time domain start position and a time domain length in a time domain, and corresponds to a frequency domain start position and a frequency domain length in a frequency domain;
determine a second uplink time-frequency resource for uplink transmission, the first uplink time-frequency resource overlaps the second uplink time-frequency resource in a time domain or overlaps in the time domain and in a frequency domain; and
transmit uplink information on the second uplink time-frequency resource when the uplink transmission meets a first condition, wherein the uplink transmission is scheduled using a second DCI, the uplink transmission is a dynamically scheduled uplink data channel and the second DCI is used to schedule the uplink data channel, or the uplink transmission is a dynamically scheduled uplink sounding reference signal and the second DCI is used to schedule the uplink sounding reference signal, the first condition is that a first DCI sending moment of the first DCI is not later than a second DCI sending moment of the second DCI, the first DCI is multicasting downlink control information comprising group-common downlink control information (GC-DCI).
10 . The apparatus according to claim 9 , wherein the instructions, when executed by the at least one processor, further cause the communication apparatus to:
skip transmitting the uplink information on an overlapping time-frequency resource between the second uplink time-frequency resource and the first uplink time-frequency resource when the uplink transmission does not meet the first condition.
11 . The apparatus according to claim 9 , wherein the first uplink time-frequency resource is a preempted time-frequency resource.
12 . The apparatus according to claim 9 , wherein:
the first DCI sending moment of the first DCI is the first symbol of a downlink control channel carrying the first DCI; and
the second DCI sending moment is a second DCI first symbol of a downlink control channel carrying the second DCI.