Abstract: The present disclosure has disclosed an antenna mounting device configured to collectively mount a plurality of base station antennas on a mast of a communication tower. The antenna mounting device is substantially in the shape of a polygon, and the mast is disposed at a center of the polygon. The antenna mounting device comprises: a plurality of brackets, which are elongated and include a head bracket, at least one intermediate bracket and a tail bracket attached sequentially; and a bracket fastening mechanism which is disposed between two adjacent ends of the head bracket and an adjacent intermediate bracket, or disposed between two adjacent ends of the adjacent intermediate brackets, or disposed between two adjacent ends of the tail bracket and the adjacent intermediate bracket, and which is configured to move two adjacent ends of the adjacent brackets from a position away from each other to a position close to each other.

Abstract: A positioning method is disclosed, including: collecting a location fingerprint; searching by using the CellID of the first base station, an offline fingerprint database for a first offline fingerprint that matches the CellID of the first base station, where the offline fingerprint database is stored in the terminal device, and the offline fingerprint database is configured to manage a plurality of offline fingerprints; searching based on a reference point location in the first offline fingerprint and the channel parameters of the Q neighboring cell base stations, the offline fingerprint database for a plurality of second offline fingerprints that meet a first condition; and determining a location of the terminal device based on a signal identifier and the reference point location in the first offline fingerprint, signal identifiers and reference point locations in the plurality of second offline fingerprints, and the Q+1 signal identifiers in the location fingerprint.

Abstract: A call switching method includes: when a first terminal device detects an input operation that is of initiating a call request to a second terminal device, or when a first terminal device receives a first call request that is initiated by a second terminal device by using a second-type communications network, detecting whether both the first terminal device and the second terminal device are in a first-type communications network; and when the first terminal device detects that both the first terminal device and the second terminal device are in the first-type communications network, initiating a second call request to the second terminal device by using the first-type communications network, or sending first prompt information to the second terminal device.

Abstract: A volume adjustment method and a terminal relate to the field of terminal technologies and applied to adaptively adjust a volume during a voice conversation, and improve user experience. The terminal collects sound data during a voice conversation, where the sound data includes uplink voice data and background noise, and adjusts, when receiving downlink voice data, a volume of the downlink voice data based on the sound data.

Abstract: A call switching method includes: when a first terminal device detects an input operation that is of initiating a call request to a second terminal device, or when a first terminal device receives a first call request that is initiated by a second terminal device by using a second-type communications network, detecting whether both the first terminal device and the second terminal device are in a first-type communications network; and when the first terminal device detects that both the first terminal device and the second terminal device are in the first-type communications network, initiating a second call request to the second terminal device by using the first-type communications network, or sending first prompt information to the second terminal device

Abstract: Embodiments of this application relate to the field of terminal technologies, and provide a volume adjustment method and a terminal, to adaptively adjust a volume during a voice conversation, and improve user experience. A specific solution is as follows: A terminal collects sound data during a voice conversation, where the sound data includes uplink voice data and background noise; and the terminal adjusts, when receiving downlink voice data, a volume of the downlink voice data based on the sound data. The embodiments of this application are used to adjust a volume.