Channel measurement method and apparatus
This application discloses a channel measurement method and apparatus. A network device sends downlink signaling, to indicate or activate a beam. A terminal device determines the beam indicated or activated by using the downlink signaling, determines, based on an association relationship between a beam and a channel measurement configuration, a channel measurement configuration associated with the beam, performs channel measurement based on the channel measurement configuration, to obtain a channel measurement result, and reports the channel measurement result to the network device. According to the channel measurement solution in this application, when channel quality of a new beam needs to be measured, the network device does not need dedicated signaling to indicate a channel measurement configuration associated with the new beam. When the beam is indicated or activated, the terminal device is triggered to perform channel measurement, to implement low-latency and low-overhead channel measurement.
1 . A channel measurement method, comprising:
receiving a radio resource control (RRC) signaling that comprises a function switch parameter, wherein the function switch parameter is configured as an enabled state indicating that a function of automatically activating or triggering an associated channel measurement configuration based on a beam activation is used;
receiving a downlink signaling for activating a beam;
determining, based on the function switch parameter, the beam activated by the downlink signaling and an association relationship between one or more beams and one or more channel measurement configurations, a channel measurement configuration associated with the beam;
performing channel measurement based on the channel measurement configuration, to obtain a channel measurement result; and
reporting the channel measurement result.
2 . The method of claim 1 , wherein the channel measurement configuration comprises one or more of the following: a trigger state, a report configuration, a resource, or a resource set.
3 . The method of claim 1 , wherein the one or more beams comprise at least one of the following:
one or more beams configured by a RRC signaling;
one or more beams activated by a media access control control element (MAC CE) signaling; or
one or more beams indicated by a downlink control information (DCI) signaling.
4 . The method of claim 1 , wherein the one or more channel measurement configurations comprise at least one of the following:
a channel measurement configuration comprising a first parameter indicating whether the channel measurement configuration is a first channel measurement configuration used to automatically measure a channel of an indicated or activated beam.
5 . The method of claim 1 , wherein in the association relationship between the one or more beams and the one or more channel measurement configurations, the one or more beams correspond to a first order, the one or more channel measurement configurations correspond to a second order, and the one or more beams in the first order are one-to-one associated with the one or more channel measurement configurations in the second order;
the first order comprises any one of the following: a configuration order, an activation order, an indication order, a descending order of indexes, and an ascending order of indexes; and
the second order comprises any one of the following: a configuration order, an activation order, an indication order, a descending order of indexes, and an ascending order of indexes.
6 . The method of claim 1 , wherein each of the one or more channel measurement configurations has a quasi-colocation (QCL) relationship with a beam associated with the each channel measurement configuration.
7 . The method of claim 1 , wherein the association relationship comprises a quasi-colocation (QCL) relationship:
a beam and a channel measurement configuration that correspond to a same transmission configuration indicator state (TCI-state) have an association relationship;
a beam and a channel measurement configuration that correspond to a same QCL resource have an association relationship; or
a beam and a channel measurement configuration whose corresponding QCL resources have the QCL relationship have an association relationship.
8 . The method of claim 1 , wherein the channel measurement configuration is a report configuration, and a type of the report configuration is an aperiodic report configuration triggered by using downlink control information (DCI) signaling or a semi-persistent report configuration activated by using DCI signaling; and
the report configuration comprises a physical uplink control channel (PUCCH) resource used to report the channel measurement result.
9 . A channel measurement method, comprising:
sending a radio resource control (RRC) signaling that comprises a function switch parameter, wherein the function switch parameter is configured as an enabled state indicating that a function of automatically activating or triggering an associated channel measurement configuration based on a beam activation is used;
sending a downlink signaling for activating a beam;
determining, based on an association relationship between one or more beams and one or more channel measurement configurations, a channel measurement configuration associated with the beam;
sending, through the beam, a reference signal corresponding to the channel measurement configuration; and
receiving a channel measurement result of the reference signal.
10 . A channel measurement apparatus, comprising a processor and a transceiver,
wherein the processor is configured to:
receive a radio resource control (RRC) signaling that comprises a function switch parameter, wherein the function switch parameter is configured as an enabled state indicating that a function of automatically activating or triggering an associated channel measurement configuration based on a beam activation is used;
receive a downlink signaling for activating a beam;
determine, based on the function switch parameter, the beam activated by the downlink signaling and an association relationship between one or more beams and one or more channel measurement configurations, a channel measurement configuration associated with the beam;
perform channel measurement based on the channel measurement configuration, to obtain a channel measurement result; and
report the channel measurement result through the transceiver.
11 . The apparatus of claim 10 , wherein the channel measurement configuration comprises one or more of the following: a trigger state, a report configuration, a resource, or a resource set.
12 . The apparatus of claim 10 , wherein the one or more beams comprise at least one of the following:
one or more beams configured by a RRC signaling;
one or more beams activated by a media access control control element (MAC CE) signaling; or
one or more beams indicated by a downlink control information (DCI) signaling.
13 . The apparatus of claim 10 , wherein the one or more channel measurement configurations comprise at least one of the following:
a channel measurement configuration comprising a first parameter indicating whether the channel measurement configuration is a first channel measurement configuration used to automatically measure a channel of an indicated or activated beam.
14 . The apparatus of claim 10 , wherein in the association relationship between the one or more beams and the one or more channel measurement configurations, the one or more beams correspond to a first order, the one or more channel measurement configurations correspond to a second order, and the one or more beams in the first order are one-to-one associated with the one or more channel measurement configurations in the second order;
the first order comprises any one of the following: a configuration order, an activation order, an indication order, a descending order of indexes, and an ascending order of indexes; and
the second order comprises any one of the following: a configuration order, an activation order, an indication order, a descending order of indexes, and an ascending order of indexes.
15 . The apparatus of claim 10 , wherein the association relationship comprises a quasi-colocation (QCL) relationship:
a beam and a channel measurement configuration that correspond to a same transmission configuration indicator state (TCI-state) have an association relationship;
a beam and a channel measurement configuration that correspond to a same QCL resource have an association relationship; or
a beam and a channel measurement configuration whose corresponding QCL resources have the QCL relationship have an association relationship.