Positioning reference signal PRS association method and communication apparatus
Embodiments of this application disclose a positioning reference signal (PRS) association method and a communication apparatus. In the method, a terminal device receives configuration information sent by a positioning management device, where the configuration information indicates an association relationship between PRSs on at least two frequencies. The terminal device measures the PRSs having the association relationship, where the PRSs having the association relationship share a same antenna port or the PRSs having the association relationship have a phase difference. By implementing embodiments of this application, a large-bandwidth PRS configuration can be implemented.
1 . A positioning reference signal (PRS) association method, performed by a terminal device or a chip in the terminal device, comprising:
receiving, from a positioning management device, second configuration information indicating an association relationship between PRS resource sets on at least two frequency points, wherein the PRS resource sets having an association relationship indicates that PRSs from different PRS resource sets have an association relationship; and
when the PRSs having the association relationship meet a first condition, measuring the PRSs having the association relationship, wherein the first condition comprises one or more conditions selected from:
the PRSs having the association relationship have a same subcarrier spacing,
the PRSs having the association relationship have a same cyclic prefix type, and
the PRSs having the association relationship occupy a same symbol;
wherein the PRSs having the association relationship share a same antenna port or the PRSs having the association relationship have a phase difference;
wherein the PRSs having the association relationship share the same antenna port means that a channel over which a symbol on an antenna port is conveyed can be inferred from a channel over which another symbol on the same antenna port is conveyed.
2 . The method according to claim 1 , wherein the second configuration information further indicates that the PRSs having the association relationship share a same antenna port or the PRSs having the association relationship have a phase difference.
3 . The method according to claim 2 , wherein the method further comprises:
sending capability information to the positioning management device, wherein the capability information indicates one or more of the following information: maximum aggregated bandwidth supported by the terminal device, a maximum quantity of aggregated frequencies supported by the terminal device, whether the terminal device supports joint measurement on PRSs on a plurality of frequencies, or a capability of performing joint processing by the terminal device on PRSs on a plurality of frequencies, wherein the aggregated bandwidth is bandwidth of PRSs having an association relationship.
4 . The method according to claim 3 , wherein a reporting granularity of the capability information is reporting by frequency band, reporting by frequency band group, reporting by frequency band in each frequency band group, or reporting by frequency band subset in each frequency band group.
5 . An apparatus comprising: at least one processor coupled to at least one memory storing instructions and configured to execute the instructions to cause the apparatus to perform:
sending first configuration information to a positioning management device, wherein the first configuration information indicates an association relationship between positioning reference signal (PRS) resource sets on at least two frequency points; the PRS resource sets having an association relationship indicates that PRSs from different PRS resource sets have an association relationship;
sending the PRSs having the association relationship, wherein the PRSs having the association relationship meet comprises one or more conditions selected from:
the PRSs having the association relationship have a same subcarrier spacing,
the PRSs having the association relationship have a same cyclic prefix type, and
the PRSs having the association relationship occupy a same symbol;
wherein the PRSs having the association relationship share a same antenna port or the PRSs having the association relationship have a phase difference;
wherein the PRSs having the association relationship share the same antenna port means that a channel over which a symbol on an antenna port is conveyed can be inferred from a channel over which another symbol on the same antenna port is conveyed.
6 . The apparatus according to claim 5 , wherein the first configuration information further indicates that the PRSs having the association relationship share a same antenna port or the PRSs having the association relationship have a phase difference.
7 . An apparatus comprising: at least one processor coupled to at least one memory storing instructions and configured to execute the instructions to cause the apparatus to perform:
receiving second configuration information indicating an association relationship between PRS resource sets on at least two frequency points, wherein the PRS resource sets having an association relationship indicates that PRSs from different PRS resource sets have an association relationship; and;
when the PRSs having the association relationship meet a first condition, measuring the PRSs having the association relationship, wherein the first condition includes the following conditions:
the PRSs having the association relationship have a same subcarrier spacing,
the PRSs having the association relationship have a same cyclic prefix type, and
the PRSs having the association relationship occupy a same symbol;
wherein the PRSs having the association relationship share a same antenna port or the PRSs having the association relationship have a phase difference;
wherein the PRSs having the association relationship share the same antenna port means that a channel over which a symbol on an antenna port is conveyed can be inferred from a channel over which another symbol on the same antenna port is conveyed.
8 . The apparatus according to claim 7 , wherein the second configuration information further indicates that the PRSs having the association relationship share a same antenna port or the PRSs having the association relationship have a phase difference.
9 . The apparatus according to claim 7 , wherein the method further comprises:
sending capability information to the positioning management device, wherein the capability information indicates one or more of the following information: maximum aggregated bandwidth supported by a terminal device, a maximum quantity of aggregated frequencies supported by the terminal device, whether the terminal device supports joint measurement on PRSs on a plurality of frequencies, or a capability of performing joint processing by the terminal device on PRSs on a plurality of frequencies, wherein the aggregated bandwidth is bandwidth of PRSs having an association relationship.
10 . The apparatus according to claim 9 , wherein a reporting granularity of the capability information is reporting by frequency band, reporting by frequency band group, reporting by frequency band in each frequency band group, or reporting by frequency band subset in each frequency band group.