Positioning beam information obtaining method and apparatus
This application provides a beam information obtaining method and an apparatus, relates to the field of communications technologies, and resolves a problem that resources of positioning reference signals are wasted because the positioning reference signals need to be omnidirectionally sent because of an unknown direction, of a terminal, caused by use of a beam, when the terminal is positioned in, e.g., a 5G system. The method in this application resolves the problem and saves overheads of sending a reference signal. The method includes: The terminal receives a beam information request sent by a location management device, where the beam information request is used to request the terminal to provide measurement information of a downlink beam. The terminal obtains beam information, where the beam information includes information about a reference signal that is sent by at least one network device and that is measured by the terminal.
1. A method, comprising:
sending, by a location management device, a beam information request to a terminal, wherein the beam information request requests the terminal to provide measurement information of a beam;
receiving, by the location management device, beam information from the terminal, wherein the beam information comprises information about a reference signal that is measured by the terminal; and
sending, by the location management device, assistance data to the terminal, wherein the assistance data comprises at least one of a beam type, a beam number, or a quasi-colocation (QCL) indication.
2. The method according claim 1 , wherein the assistance data is determined by the beam information.
3. The method according claim 1 , wherein the beam information is carried by a message that requests the assistance data.
4. The method according claim 1 , wherein the assistance data is for determining a direction of a beam for receiving a positioning reference signal.
5. An apparatus, comprising:
a transmitter configured to send a beam information request to a terminal, wherein the beam information request requests the terminal to provide measurement information of a beam; and
a receiver configured to receive beam information from the terminal, wherein the beam information comprises information about a reference signal that is measured by the terminal, wherein
the transmitter is further configured to send assistance data to the terminal, and
the assistance data comprises at least one of a beam type, a beam number, or a quasi-colocation (QCL) indication.
6. The apparatus according claim 5 , wherein the assistance data is determined by the beam information.
7. The apparatus according claim 5 , wherein the beam information is carried by a message that requests the assistance data.
8. The apparatus according claim 5 , wherein the assistance data is for determining a direction of a beam for receiving a positioning reference signal.
9. An apparatus, comprising:
a processor configured to obtain beam information, wherein the beam information comprises information about a reference signal that is measured by the apparatus;
a transmitter configured to send the obtained beam information to a location management device; and
a receiver configured to receive assistance data from the location management device, wherein the assistance data comprises at least one of a beam type, a beam number, or a quasi-colocation (QCL) indication.
10. The apparatus according claim 9 , wherein the receiver is further configured to receive a beam information request sent by the location management device, and the beam information request requests the apparatus to provide measurement information of a beam.
11. The apparatus according claim 9 , wherein the assistance data is determined by the beam information.
12. The apparatus according claim 9 , wherein the transmitter is configured to send the beam information by a message that requests the assistance data.
13. The apparatus according claim 9 , wherein the processor is further configured to determine, based on the assistance data, a direction of a beam for receiving a positioning reference signal.
14. The apparatus according to claim 9 , wherein
the transmitter is further configured to send a measurement request to a serving base station, to request to measure the reference signal,
the measurement request comprises at least one of: an identifier of a target transmission point, frequency band information, bandwidth information, a waveform parameter, or a measurement type indication, and
the measurement type indication indicates to the serving base station to configure beam information measurement for the apparatus.
15. The method according claim 1 , wherein the beam information request comprises at least one of: an identifier of a target transmission point, frequency band information, bandwidth information, or a waveform parameter.
16. The method according claim 1 , wherein the beam information request requests measurement information of a downlink beam of the terminal, and the beam information request comprises an identifier of a target transmission point.
17. The method according claim 1 , wherein the receiving the beam information comprises:
receiving a beam information report which comprises at least one of: an identifier of a transmission point, a beam type corresponding to the transmission point, a beam number, or a measured reference signal received power (RSRP) corresponding to the beam number.
18. The method according to claim 1 , wherein the assistance data comprises the beam type.
19. The method according to claim 1 , wherein the assistance data comprises the beam number.
20. The method according to claim 1 , wherein the assistance data comprises the quasi-colocation (QCL) indication.