Channel measurement method and terminal apparatus
This application provides a channel measurement method and an apparatus, which may be used in a field such as vehicle-to-everything V2X, smart internet of vehicles, autonomous driving, or an unmanned driving. In a sidelink channel report procedure, a transmit end apparatus for sidelink communication indicates one or more candidate time intervals to a receive end apparatus. The receive end apparatus may attempt to obtain an available PSSCH for sending a channel measurement report on one or more time domain resources corresponding to the one or more candidate time intervals.
1. A method, comprising:
sending, by a first terminal apparatus, reference signal configuration information to a second terminal apparatus, the reference signal configuration information indicating a resource of a first reference signal, the first reference signal being used for channel measurement;
sending, by the first terminal apparatus, channel report configuration information to the second terminal apparatus, the channel report configuration information comprising a candidate time interval, the candidate time interval being a time interval between a time domain resource for carrying trigger information and a time domain resource for carrying a channel measurement report, the trigger information triggering channel measurement;
sending, by the first terminal apparatus, first trigger information to the second terminal apparatus;
sending, by the first terminal apparatus, the first reference signal to the second terminal apparatus; and
detecting, by the first terminal apparatus, a channel measurement report from the second terminal apparatus based on the candidate time interval, wherein detecting the channel measurement report comprises:
receiving, by the first terminal apparatus, a first channel measurement report from the second terminal apparatus in a first time range,
wherein the first time range has a duration that is a first candidate time interval starting from a moment for sending the first trigger information by the first terminal apparatus.
2. The method according to claim 1 , wherein the candidate time interval is in a unit of slot.
3. The method according to claim 1 , wherein:
the first reference signal is a sidelink channel state information reference signal (SL CSI-RS); and
the SL CSI-RS is aperiodic.
4. The method according to claim 1 , wherein the reference signal configuration information and the channel report configuration information are carried in a radio resource control (RRC) message.
5. The method according to claim 1 , wherein a time domain resource for carrying the first trigger information, as sent by the first terminal apparatus, is the same as a time domain resource for carrying the first reference signal, as sent by the first terminal apparatus.
6. A method, comprising:
receiving, by a second terminal apparatus, reference signal configuration information from a first terminal apparatus, the reference signal configuration information indicating a resource of a first reference signal, the first reference signal being used for channel measurement;
receiving, by the second terminal apparatus, channel report configuration information from the first terminal apparatus, the channel report configuration information comprising a candidate time interval, the candidate time interval being a time interval between a time domain resource for carrying trigger information and a time domain resource for carrying a channel measurement report, the trigger information triggering channel measurement;
receiving, by the second terminal apparatus, first trigger information from the first terminal apparatus;
receiving, by the second terminal apparatus, the first reference signal from the first terminal apparatus;
obtaining, by the second terminal apparatus, a first channel measurement report based on the first reference signal;
determining, by the second terminal apparatus, a first time domain resource based on the channel report configuration information; and
sending, by the second terminal apparatus using the first time domain resource, the first channel measurement report to the first terminal apparatus, wherein sending the first channel measurement report comprises:
sending, by the second terminal apparatus, the first channel measurement report to the first terminal apparatus in a first time range,
wherein the first time range has a duration that is a first candidate time interval starting from a moment for sending the first trigger information by the first terminal apparatus.
7. The method according to claim 6 , wherein the candidate time interval is in a unit of slot.
8. The method according to claim 6 , wherein:
the first reference signal is a sidelink channel state information reference signal (SL CSI-RS); and
the SL CSI-RS is aperiodic.
9. The method according to claim 6 , wherein the reference signal configuration information and the channel report configuration information, as received by the second terminal apparatus, are carried in a radio resource control (RRC) message.
10. The method according to claim 6 , wherein a time domain resource carrying the first trigger information, as received by the second terminal apparatus, is the same as a time domain resource carrying the first reference signal, as received by the second terminal apparatus.
11. An apparatus, comprising:
one or more processors; and
a non-transitory memory configured to store program instructions that are executable by the one or more processors, wherein the program instructions include instructions that, when executed by the one or more processors, cause the apparatus to:
send reference signal configuration information to a second terminal apparatus, the reference signal configuration information indicating a resource of a first reference signal, the first reference signal being used for channel measurement;
send channel report configuration information to the second terminal apparatus, the channel report configuration information indicating a candidate time interval, the candidate time interval being a time interval between a time domain resource for carrying trigger information and a time domain resource for carrying a channel measurement report, the trigger information triggering channel measurement;
send first trigger information to the second terminal apparatus;
send the first reference signal to the second terminal apparatus; and
detect a channel measurement report from the second terminal apparatus based on the candidate time interval, wherein to detect the channel measurement report, the instructions, when executed by the one or more processors, cause the apparatus to:
receive a first channel measurement report from the second terminal apparatus in a first time range,
wherein the first time range has a duration that is a first candidate time interval starting from a moment for sending the first trigger information.
12. The apparatus according to claim 11 , wherein the candidate time interval is in a unit of slot.
13. The apparatus according to claim 11 , wherein:
the first reference signal is a sidelink channel state information reference signal (SL CSI-RS); and
the SL CSI-RS is aperiodic.
14. The apparatus according to claim 11 , wherein the reference signal configuration information and the channel report configuration information, as sent, are carried in a radio resource control (RRC) message.
15. The apparatus according to claim 11 , wherein a time domain resource for carrying the first trigger information, as sent, is the same as a time domain resource for carrying the first reference signal, as sent.
16. An apparatus, comprising:
one or more processors, and
a non-transitory memory configured to store program instructions that are executable by the one or more processors, wherein the program instructions include instructions that, when executed by the one or more processors, cause the apparatus to:
receive reference signal configuration information from a first terminal apparatus, the reference signal configuration information indicating a resource of a first reference signal, the first reference signal being used for channel measurement;
receive channel report configuration information from the first terminal apparatus, the channel report configuration information indicating a candidate time interval, the candidate time interval being a time interval between a time domain resource for carrying trigger information and a time domain resource for carrying a channel measurement report, the trigger information triggering channel measurement;
receive first trigger information from the first terminal apparatus;
receive the first reference signal from the first terminal apparatus;
obtain a first channel measurement report based on the first reference signal;
determine a first time domain resource based on the channel report configuration information; and
send, using the first time domain resource, the first channel measurement report to the first terminal apparatus, wherein to send the first channel measurement report, the instructions, when executed by the one or more processors, cause the apparatus to:
send the first channel measurement report to the first terminal apparatus in a first time range,
wherein the first time range has a duration that is a first candidate time interval starting from a moment for sending the first trigger information by the first terminal apparatus.
17. The apparatus according to claim 16 , wherein the candidate time interval is in a unit of slot.
18. The apparatus according to claim 16 , wherein:
the first reference signal is a sidelink channel state information reference signal (SL CSI-RS); and
the SL CSI-RS is aperiodic.
19. The apparatus according to claim 16 , wherein the reference signal configuration information and the channel report configuration information, as received, are carried in a radio resource control (RRC) message.
20. The apparatus according to claim 16 , wherein a time domain resource carrying the first trigger information, as received, is the same as a time domain resource carrying the first reference signal, as received.