Patent ID: 11921220
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 5:
6. The positioning system according to claim 5, further comprising a second macro cell base station that has a macro cell, which is an area larger than the small cell, as a communicable area and that has a GNSS reception function of receiving radio waves transmitted from GNSS satellites and obtains GNSS data from the radio waves, wherein
when (A) the mobile station moves from a first macro cell that is a macro cell of the first macro cell base station to a second macro cell that is a macro cell of the second macro cell base station, (B) handover processing in which a source of control plane data for performing control using the macro cell is handed over from the first macro cell base station to the second macro cell base station is performed, and (C) a process of changing a transmission source of the positioning data transmitted from the macro cell base station for positioning the mobile station to the mobile station from the first macro cell base station to the second macro cell base station is performed,
after the above process is performed, the second macro cell base station transmits the positioning data obtained by the second macro cell base station to the small cell base station of the small cell in which the mobile station exists as user plane data addressed to the mobile station,
the small cell base station transmits the user plane data including the positioning data received from the macro cell base station to the mobile station,
the mobile station obtains the positioning data from the user plane data transmitted from the second macro cell base station via the small cell base station, and performs positioning of the mobile station using the obtained positioning data and the GNSS data obtained from radio waves received by the mobile station from the GNSS satellites.