TECHNICAL FIELD

Embodiments of this application relate to communications technologies, and in particular, to a measurement and reporting method, a terminal, and a base station.

BACKGROUND

During evolution of the fifth-generation mobile communications (5G) technology, communication at a large data rate needs to be supported, and a high-band spectrum resource has relatively large bandwidth and is an effective manner for implementing communication at a large data rate. However, due to a high-band radio propagation characteristic (a relatively large path loss), coverage in a high band is restricted. It is critical to maintaining desirable coverage while a large data rate is supported.

In consideration of a relatively short wavelength corresponding to a high band, an antenna distance can be reduced, so that more antenna array elements can be disposed in a same area. A large quantity of antenna array elements may constitute a large-scale array antenna, and the large-scale array antenna can achieve an array gain through beamforming, to effectively increase coverage and avoid a high-band path loss. Therefore, communication between a base station and a terminal in a high band is usually performed by using a beam. As shown inFIG. 1A(FIG. 1Ais a first schematic diagram of communication by using a beam), a terminal reports a plurality of beams of a base station and channel quality measurement results corresponding to the plurality of beams; and further the base station determines one or more beams (used to send downlink data to the terminal) from the plurality of beams reported by the terminal. The terminal usually reports a plurality of beams corresponding to best reference signal received powers (RSRP). In the prior art, the terminal does not consider space continuity of shields during reporting; in addition, because a wavelength of a high-band spectrum is relatively short, a wireless signal has a relatively poor diffraction capability and is prone to impact of a shield. As a result, in the prior art, the one or more beams determined by the base station from the plurality of beams reported by the terminal may be at risk of being shielded, and communication reliability is relatively low.

SUMMARY

Embodiments of this application provide a measurement and reporting method, a terminal, and a base station, to improve communication reliability.

According to a first aspect, this application provides a measurement and reporting method, including:

receiving, by a terminal, a measurement configuration from a base station, where the measurement configuration is used to indicate a plurality of measurement objects to be measured;

obtaining, by the terminal, measurement results and channel characteristic values respectively corresponding to the plurality of measurement objects; and

sending, by the terminal, channel characteristic values and measurement results respectively corresponding to some or all of the plurality of measurement objects, or group identification information and measurement results respectively corresponding to some or all of the plurality of measurement objects, where different groups are corresponding to different channel characteristic values, and channel characteristic values in a same group may be the same or may be different.

In a possible design, a channel characteristic includes one or more of the following:

an angle of arrival, an average angle of arrival, angle-of-arrival spread, an angle of departure, an average angle of departure, angle-of-departure spread, QCL information, a transmission delay, an average transmission delay, transmission delay spread, channel quality, and a terminal receiving object.

In a possible design, the method further includes:

receiving, by the terminal, reporting mode instruction information from the base station, where the reporting mode instruction information is used to:

instruct the terminal to report the channel characteristic values and the measurement results respectively corresponding to the some or all of the plurality of measurement objects; or

instruct the terminal to report the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, where the some or all of the plurality of measurement objects belong to a same group; or

instruct the terminal to report the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, where the some or all of the plurality of measurement objects belong to different groups.

In a possible design, the channel characteristic is an angle of arrival, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different angle-of-arrival values.

In a possible design, the channel characteristic is an average angle of arrival and angle-of-arrival spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average angle-of-arrival values and different angle-of-arrival spread values.

In a possible design, the channel characteristic is an angle of departure, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different angle-of-departure values.

In a possible design, the channel characteristic is an average angle of departure and angle-of-departure spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average angle-of-departure values and different angle-of-departure spread values.

In a possible design, the channel characteristic is QCL information, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different QCL information.

In a possible design, the channel characteristic is a transmission delay, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different transmission delay values.

In a possible design, the channel characteristic is an average transmission delay and transmission delay spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average transmission delay values and different transmission delay spread values.

In a possible design, the channel characteristic is channel quality, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different channel quality values.

In a possible design, the channel characteristic is a terminal receiving object, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different terminal receiving object values.

In a possible design, the measurement results corresponding to the some of the measurement objects satisfy a preset condition.

In a possible design, after the sending, by the terminal, group identification information and measurement results respectively corresponding to some or all of the plurality of measurement objects, the method further includes:

receiving, by the terminal, data that is sent by the base station by using target measurement objects, where the target measurement objects are selected from different groups.

In a possible design, after the sending, by the terminal, group identification information and measurement results respectively corresponding to some or all of the plurality of measurement objects, the method further includes:

receiving, by the terminal, data that is sent by the base station by using target measurement objects, where the target measurement objects are selected from one group.

In a possible design, the method further includes:

using, by the terminal as a sending measurement object, a receiving object that is utilized when the data sent by the base station by using the target measurement objects is being received, where the sending measurement object is used by the terminal to send data to the base station.

According to the measurement and reporting method provided in the first aspect, after receiving the measurement configuration (which is used to indicate the plurality of measurement objects to be measured) sent by the base station, the terminal obtains the measurement results and the channel characteristic values respectively corresponding to the plurality of measurement objects, and sends the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, where different groups are corresponding to different channel characteristic values, so that the base station receives the group identification information and the measurement results that are respectively corresponding to the some or all of the plurality of measurement objects and that are reported by the terminal, and determines, from a plurality of measurement object groups after determining a grouping status of measurement objects, a plurality of target measurement objects used to send data to the terminal. Alternatively, the terminal obtains the measurement results and the channel characteristic values respectively corresponding to the plurality of measurement objects, and sends the channel characteristic values and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, so that the base station groups the some or all of the plurality of measurement objects based on the channel characteristic values respectively corresponding to the some or all of the plurality of measurement objects, and determines, from a plurality of measurement object groups, a plurality of target measurement objects used to send data to the terminal. To sum up, different groups are corresponding to different channel characteristic values in this application (to be specific, a difference between transmission paths corresponding to measurement objects in different groups is greater than a preset difference), and therefore the plurality of target measurement objects determined by the base station from the plurality of measurement object groups are not easily shielded at the same time. This improves communication reliability.

According to a second aspect, this application provides a measurement and reporting method, including:

sending, by a base station, a measurement configuration to a terminal, where the measurement configuration is used to indicate a plurality of measurement objects to be measured; and

receiving, by the base station from the terminal, group identification information and measurement results respectively corresponding to some or all of the plurality of measurement objects, or channel characteristic values and measurement results respectively corresponding to some or all of the plurality of measurement objects, where different groups are corresponding to different channel characteristic values.

In a possible design, a channel characteristic includes one or more of the following:

an angle of arrival, an average angle of arrival, angle-of-arrival spread, an angle of departure, an average angle of departure, angle-of-departure spread, QCL information, a transmission delay, an average transmission delay, transmission delay spread, channel quality, and a terminal receiving object.

In a possible design, the method further includes:

sending, by the base station, reporting mode instruction information to the terminal, where the reporting mode instruction information is used to:

instruct the terminal to report the channel characteristic values and the measurement results respectively corresponding to the some or all of the plurality of measurement objects; or

instruct the terminal to report the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, where the some or all of the plurality of measurement objects belong to a same group; or

instruct the terminal to report the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, where the some or all of the plurality of measurement objects belong to different groups.

In a possible design, the method further includes:

grouping, by the base station, the some or all of the plurality of measurement objects based on the channel characteristic values respectively corresponding to the some or all of the plurality of measurement objects.

In a possible design, the channel characteristic is an angle of arrival, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different angle-of-arrival values.

In a possible design, the channel characteristic is an average angle of arrival and angle-of-arrival spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average angle-of-arrival values and different angle-of-arrival spread values.

In a possible design, the channel characteristic is an angle of departure, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different angle-of-departure values.

In a possible design, the channel characteristic is an average angle of departure and angle-of-departure spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average angle-of-departure values and different angle-of-departure spread values.

In a possible design, the channel characteristic is QCL information, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different QCL information.

In a possible design, the channel characteristic is a transmission delay, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different transmission delay values.

In a possible design, the channel characteristic is an average transmission delay and transmission delay spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average transmission delay values and different transmission delay spread values.

In a possible design, the channel characteristic is channel quality, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different channel quality values.

In a possible design, the channel characteristic is a terminal receiving object, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different terminal receiving object values.

In a possible design, the method further includes:

selecting, by the base station, a plurality of target measurement objects from different groups; and

sending, by the base station, data to the terminal by using the plurality of target measurement objects.

In a possible design, the method further includes:

selecting, by the base station, a plurality of target measurement objects from one group; and

sending, by the base station, data to the terminal by using the plurality of target measurement objects.

In a possible design, measurement results corresponding to the target measurement objects satisfy a preset condition.

In a possible design, the method further includes:

determining, by the base station, target measurement objects of another base station based on the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects; and

sending, by the base station, resource indication information to the another base station, where the resource indication information includes identifiers of the target measurement objects of the another base station.

According to the measurement and reporting method provided in the second aspect, the base station receives the group identification information and the measurement results that are respectively corresponding to the some or all of the plurality of measurement objects and that are reported by the terminal, so that the base station determines, from a plurality of measurement object groups after determining a grouping status of measurement objects, a plurality of target measurement objects used to send data to the terminal. Alternatively, the base station receives the channel characteristic values and the measurement results that are respectively corresponding to the some or all of the plurality of measurement objects and that are sent by the terminal, so that the base station groups the some or all of the plurality of measurement objects based on the channel characteristic values respectively corresponding to the some or all of the plurality of measurement objects, and determines, from a plurality of measurement object groups, a plurality of target measurement objects used to send data to the terminal. To sum up, different groups are corresponding to different channel characteristic values in this embodiment of this application (to be specific, a difference between transmission paths corresponding to measurement objects in different groups is greater than a preset difference), and therefore the plurality of target measurement objects determined by the base station from the plurality of measurement object groups are not easily shielded at the same time. This improves communication reliability.

According to a third aspect, this application provides a terminal, including a receiver, a transmitter, and a processor, where

the receiver is configured to receive a measurement configuration from a base station, where the measurement configuration is used to indicate a plurality of measurement objects to be measured;

the processor is configured to obtain measurement results and channel characteristic values respectively corresponding to the plurality of measurement objects; and

the transmitter is configured to send channel characteristic values and measurement results respectively corresponding to some or all of the plurality of measurement objects, or group identification information and measurement results respectively corresponding to some or all of the plurality of measurement objects, where different groups are corresponding to different channel characteristic values.

In a possible design, a channel characteristic includes one or more of the following:

an angle of arrival, an average angle of arrival, angle-of-arrival spread, an angle of departure, an average angle of departure, angle-of-departure spread, QCL information, a transmission delay, an average transmission delay, transmission delay spread, channel quality, and a terminal receiving object.

In a possible design, the receiver is further configured to receive reporting mode instruction information from the base station, where the reporting mode instruction information is used to:

instruct the terminal to report the channel characteristic values and the measurement results respectively corresponding to the some or all of the plurality of measurement objects; or

instruct the terminal to report the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, where the some or all of the plurality of measurement objects belong to a same group; or

instruct the terminal to report the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, where the some or all of the plurality of measurement objects belong to different groups.

In a possible design, the channel characteristic is an angle of arrival, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different angle-of-arrival values.

In a possible design, the channel characteristic is an average angle of arrival and angle-of-arrival spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average angle-of-arrival values and different angle-of-arrival spread values.

In a possible design, the channel characteristic is an angle of departure, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different angle-of-departure values.

In a possible design, the channel characteristic is an average angle of departure and angle-of-departure spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average angle-of-departure values and different angle-of-departure spread values.

In a possible design, the channel characteristic is QCL information, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different QCL information.

In a possible design, the channel characteristic is a transmission delay, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different transmission delay values.

In a possible design, the channel characteristic is an average transmission delay and transmission delay spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average transmission delay values and different transmission delay spread values.

In a possible design, the channel characteristic is channel quality, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different channel quality values.

In a possible design, the channel characteristic is a terminal receiving object, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different terminal receiving object values.

In a possible design, the measurement results corresponding to the some of the measurement objects satisfy a preset condition.

In a possible design, the receiver is further configured to receive data that is sent by the base station by using target measurement objects, where the target measurement objects are selected from different groups.

In a possible design, the receiver is further configured to receive data that is sent by the base station by using target measurement objects, where the target measurement objects are selected from one group.

In a possible design, the processor is further configured to use, as a sending measurement object, a receiving object that is utilized when the data sent by the base station by using the target measurement objects is being received, where the sending measurement object is used by the terminal to send data to the base station.

For beneficial effects of the terminal provided in the third aspect and the possible implementations of the third aspect, reference may be made to the beneficial effects brought by the first aspect and the possible implementations of the first aspect. Details are not described herein again.

According to a fourth aspect, this application provides a base station, including a transmitter and a receiver, where

the transmitter is configured to send a measurement configuration to a terminal, where the measurement configuration is used to indicate a plurality of measurement objects to be measured; and

the receiver is configured to receive, from the terminal, group identification information and measurement results respectively corresponding to some or all of the plurality of measurement objects, or channel characteristic values and measurement results respectively corresponding to some or all of the plurality of measurement objects, where different groups are corresponding to different channel characteristic values.

In a possible design, a channel characteristic includes one or more of the following:

an angle of arrival, an average angle of arrival, angle-of-arrival spread, an angle of departure, an average angle of departure, angle-of-departure spread, QCL information, a transmission delay, an average transmission delay, transmission delay spread, channel quality, and a terminal receiving object.

In a possible design, the transmitter is further configured to send reporting mode instruction information to the terminal, where the reporting mode instruction information is used to:

instruct the terminal to report the channel characteristic values and the measurement results respectively corresponding to the some or all of the plurality of measurement objects; or

instruct the terminal to report the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, where the some or all of the plurality of measurement objects belong to a same group; or

instruct the terminal to report the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects, where the some or all of the plurality of measurement objects belong to different groups.

In a possible design, the base station further includes a first processor, where

the first processor is configured to group the some or all of the plurality of measurement objects based on the channel characteristic values respectively corresponding to the some or all of the plurality of measurement objects.

In a possible design, the channel characteristic is an angle of arrival, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different angle-of-arrival values.

In a possible design, the channel characteristic is an average angle of arrival and angle-of-arrival spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average angle-of-arrival values and different angle-of-arrival spread values.

In a possible design, the channel characteristic is an angle of departure, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different angle-of-departure values.

In a possible design, the channel characteristic is an average angle of departure and angle-of-departure spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average angle-of-departure values and different angle-of-departure spread values.

In a possible design, the channel characteristic is QCL information, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different QCL information.

In a possible design, the channel characteristic is a transmission delay, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different transmission delay values.

In a possible design, the channel characteristic is an average transmission delay and transmission delay spread, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different average transmission delay values and different transmission delay spread values.

In a possible design, the channel characteristic is channel quality, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different channel quality values.

In a possible design, the channel characteristic is a terminal receiving object, and that different groups are corresponding to different channel characteristic values includes: different groups are corresponding to different terminal receiving object values.

In a possible design, the transmitter is further configured to:

select a plurality of target measurement objects from different groups; and

send data to the terminal by using the plurality of target measurement objects.

In a possible design, the transmitter is further configured to:

select a plurality of target measurement objects from one group; and

send data to the terminal by using the plurality of target measurement objects.

In a possible design, measurement results corresponding to the target measurement objects satisfy a preset condition.

In a possible design, the base station further includes a second processor, where

the second processor is configured to determine target measurement objects of another base station based on the group identification information and the measurement results respectively corresponding to the some or all of the plurality of measurement objects; and

the transmitter is further configured to send resource indication information to the another base station, where the resource indication information includes identifiers of the target measurement objects of the another base station.

For beneficial effects of the base station provided in the fourth aspect and the possible implementations of the fourth aspect, reference may be made to the beneficial effects brought by the second aspect and the possible implementations of the second aspect. Details are not described herein again.

In the foregoing aspects, the terminal sends a message to the base station, where the message carries a measurement object identifier used by the terminal to send the message;

the base station receives the message sent by the terminal, where the message carries the measurement object identifier used by the terminal to send the message; and

the base station determines a spatial distribution relationship between measurement objects for the terminal side based on the measurement object identifier and preset measurement object arrangement information.

