Abstract: Provided are a main beam direction determining device, a main beam direction determining method, and a program which are able to shorten a time required to determine a main beam direction. A secondary candidate sector selection unit selects a second number of primary candidates or a third number of primary candidates as a secondary candidate or candidates in accordance with a communication quality of communication by an HMD, the second number being smaller than a first number, the third number being smaller than the second number. A first sector level sweep process performing unit determines one of the secondary candidate or candidates as the main beam direction.

Abstract: There are provided an antenna control apparatus, a head-mounted display, an antenna control method, and a program that are capable of suppressing power consumption of the head-mounted display including a plurality of antennas. A selection unit selects, as an antenna to be driven, a portion of the plurality of antennas in accordance with an attitude of the head-mounted display including the plurality of antennas. An antenna control unit controls only the antenna to be driven to be driven and an antenna other than the antenna to be driven to be stopped.

Abstract: An image acquisition unit acquires an image that includes a figure of the user wearing a head-mounted display. A narrowed-down region specification unit specifies, within the image, a region that includes a figure of the head of the user when a posture of the user stretches in a vertical direction. A secondary candidate sector selection unit selects, from among primary candidates of a plurality of the main beam directions, secondary candidates that are directions made to be correspondent to positions within the region. A sector-level sweep processing execution unit determines, from among the secondary candidates, a main beam direction for communication with the head-mounted display. The region has a projection part.

Abstract: There are provided a main beam direction determining device, a main beam direction determining method, and a program each of which is capable of shortening a time required for determination of a main beam direction of a head-mounted display. A secondary candidate sector selecting portion selects a part of a plurality of primary candidates as secondary candidates in response to a posture of an HMD. A sector level sweep processing executing portion determines a main beam direction of the HMD based on communication qualities when communications by the respective secondary candidates are performed from the secondary candidates.

Abstract: Provided are a main beam direction determining device, a main beam direction determining method, and a program which are able to shorten a time required to determine a main beam direction. A secondary candidate sector selection unit selects a second number of primary candidates or a third number of primary candidates as a secondary candidate or candidates in accordance with a communication quality of communication by an HMD, the second number being smaller than a first number, the third number being smaller than the second number. A first sector level sweep process performing unit determines one of the secondary candidate or candidates as the main beam direction.

Abstract: An image acquisition unit acquires an image that includes a figure of the user wearing a head-mounted display. A narrowed-down region specification unit specifies, within the image, a region that includes a figure of the head of the user when a posture of the user stretches in a vertical direction. A secondary candidate sector selection unit selects, from among primary candidates of a plurality of the main beam directions, secondary candidates that are directions made to be correspondent to positions within the region. A sector-level sweep processing execution unit determines, from among the secondary candidates, a main beam direction for communication with the head-mounted display. The region has a projection part.

Abstract: There are provided an antenna control apparatus, a head-mounted display, an antenna control method, and a program that are capable of suppressing power consumption of the head-mounted display including a plurality of antennas. A selection unit (54) selects, as an antenna to be driven, a portion of the plurality of antennas in accordance with an attitude of the head-mounted display including the plurality of antennas. An antenna control unit (56) controls only the antenna to be driven to be driven and an antenna other than the antenna to be driven to be stopped.

Abstract: There are provided a main beam direction determining device, a main beam direction determining method, and a program each of which is capable of shortening a time required for determination of a main beam direction of a head-mounted display. A secondary candidate sector selecting portion selects a part of a plurality of primary candidates as secondary candidates in response to a posture of an HMD. A sector level sweep processing executing portion determines a main beam direction of the HMD based on communication qualities when communications by the respective secondary candidates are performed from the secondary candidates.

Abstract: Provided is a wireless communication device that ensures reduced interference between a plurality of antennas without relatively separating the antennas. The wireless communication device includes a first antenna, a second antenna, and a planar conductor. The conductor is arranged adjacent to both of the first and second antennas on one side. A cutout portion is formed in the conductor. The cutout portion extends from an outer edge between positions adjacent to the first and second antennas.

Abstract: Provided is a wireless communication device that ensures reduced interference between a plurality of antennas without relatively separating the antennas. The wireless communication device includes a first antenna, a second antenna, and a planar conductor. The conductor is arranged adjacent to both of the first and second antennas on one side. A cutout portion is formed in the conductor. The cutout portion extends from an outer edge between positions adjacent to the first and second antennas.