Abstract: A communication design support apparatus includes: a propagation model storage unit that stores a propagation model; an acquisition unit that acquires data in which structure data containing coordinate data is associated with data indicating propagation loss; and a selection unit that selects data indicating classification of a characteristic of a communication environment in a structure indicated by the structure data based on the acquired data.

Abstract: A communication design support apparatus includes: an acquisition unit that acquires point cloud data of a structure and measurement data of a radio field intensity; a structure data generation unit that generates structure data indicating a shape and material of the structure based on a result of object recognition of the point cloud data; a propagation loss calculation unit that calculates propagation loss based on the measurement data of the radio field intensity in an environment including the structure; and an output unit that outputs data in which the structure

Abstract: An information processing system includes: a first ray tracing unit configured to determine a two-dimensional ray trace from a transmission point at which a radio wave is transmitted, to a reception point at which the radio wave is received; a second ray tracing unit configured to determine a three-dimensional ray trace corresponding to the two-dimensional ray trace, using height information about the transmission point and the reception point; and a radio field intensity calculation unit that calculates the intensity of the radio wave at the reception point, using one or more three-dimensional ray traces determined by the second ray tracing unit.

Abstract: A communication design support apparatus includes: a propagation model storage unit that stores a propagation model; an acquisition unit that acquires data in which structure data containing coordinate data is associated with data indicating propagation loss; and a parameter update unit that updates a parameter of the propagation model based on the acquired data.

Abstract: A communication design support apparatus includes: a propagation model storage unit configured to store a propagation model; a site survey unit configured to collect data obtained by measuring a structure; a data processing unit configured to update a parameter of the propagation model; and a radio field intensity estimation unit configured to estimate a radio field intensity in the structure by applying the propagation model having the parameter having been updated.

Abstract: An information processing system includes: an acquisition unit configured to divide a target area into a plurality of meshes of a predetermined size, and acquire mesh data indicating the environment of the target area with height information about the plurality of meshes on a per-mesh basis; a first ray tracing unit configured to determine a two-dimensional ray trace from a transmission point to a reception point on the basis of the mesh data, a radio wave being transmitted at the transmission point, the radio wave being received at the reception point; a second ray tracing unit configured to determine a three-dimensional ray trace corresponding to the two-dimensional ray trace, on the basis of the mesh data, and height information about the transmission point and the reception point; and a radio field intensity calculation unit configured to calculate an intensity of the radio wave at the reception point, using one or more three-dimensional ray traces determined by the second ray tracing unit.

Abstract: A communication design support apparatus includes: a propagation model storage unit that stores a propagation model; an acquisition unit that acquires point cloud data of a structure and measurement data of radio wave intensities in a plurality of frequency bands; a parameter update unit that updates a parameter of the propagation model based on the acquired data; and an estimation unit that estimates propagation loss based on the propagation model.

Abstract: A connection destination switching control method executed by a communication apparatus, the connection destination switching control method comprising: a data acquisition step of acquiring observed values of received power of signals transmitted from a base station; a prediction processing step of predicting future received power by using the observed values acquired in the data acquisition step as input data into a prediction model; and a connection destination switching processing step of executing control for handover based on the future received power predicted in the prediction processing step.

Abstract: An antenna system for a vehicle includes a plurality of antenna sets provided on or in proximity to a dielectric arranged on front and rear sides or on right and left sides of the vehicle, or arranged on both thereof, wherein a first antenna set includes first and second antennas, a second antenna set includes third and fourth antennas, a third antenna set includes fifth and sixth antennas, a fourth antenna set includes seventh and eighth antennas, each of the first, third, fifth, and seventh antennas has a higher antenna gain for transmitting and receiving a horizontally polarized wave than transmitting and receiving a vertically polarized wave, and each of the second, fourth, sixth, and eighth antennas has a higher antenna gain for transmitting and receiving the vertically polarized wave than transmitting and receiving the horizontally polarized wave.

Abstract: An antenna system for a vehicle includes a plurality of antenna sets provided on or in proximity to a dielectric arranged on front and rear sides or on right and left sides of the vehicle, or arranged on both thereof, wherein a first antenna set includes first and second antennas, a second antenna set includes third and fourth antennas, a third antenna set includes fifth and sixth antennas, a fourth antenna set includes seventh and eighth antennas, each of the first, third, fifth, and seventh antennas has a higher antenna gain for transmitting and receiving a horizontally polarized wave than transmitting and receiving a vertically polarized wave, and each of the second, fourth, sixth, and eighth antennas has a higher antenna gain for transmitting and receiving the vertically polarized wave than transmitting and receiving the horizontally polarized wave.