Abstract: A content upload system includes: a content distributing server that is installed in an airplane and distributes audio-video contents into the airplane; and a plurality of content accumulating servers that are installed in a plurality of airports, in which the airplane is parked, and transmit the audio-video contents to the content distributing server through a network. The content distributing server selectively writes audio-video contents that have not been stored in the content distributing server of audio-video contents transmitted from the content accumulating server while the airplane is parked on the airport.

Abstract: A radio communication system includes radio terminal apparatuses each arranged at a previously determined position, radio base station apparatuses for holding radio communications with these apparatuses, and a communication system controller for communicating with the respective radio terminal apparatus via the respective radio base station apparatuses connected thereto via a LAN.

Abstract: A radio communication system is disclosed. This system includes a wireless base station placed at an upper section of a communicating zone in a mobile unit such as an aircraft, multiple seat-rows arranged along a longitudinal direction in the communicating zone, and wireless terminals placed at each one of seats of the seat rows. Radio communication is done between the wireless base station and the wireless terminals. The wireless base station is placed on the ceiling at the forefront or at the extreme end of the communicating zone relative to the longitudinal direction of the seat rows.

Abstract: An antenna device has a linear antenna element; a passive element section provided in proximity to the antenna element; and a control section that controls the passive element section. The passive element section has a linear line laid in parallel to the antenna element; and an impedance adjustment section that adjusts impedance of the passive element section. A compact antenna device capable of switching its directivity by means of electrical operation can be provided.

Abstract: The present invention is a wireless communication system for establishing wireless communication between a wireless base station installed at the upper part of a communication area in a moving vehicle and a wireless terminal in the communication area, comprising a space surrounded by wall surfaces rising vertically in the communication area, wherein the space has an opening opened by specified width in a plane direction, and the wireless base station is installed in a region extended from the opening of the space by specified width outwardly of the wall surface.

Abstract: The present invention includes a receiving antenna receiving information while changing plural different wireless base stations; a seat information acquiring unit acquiring position information of a destination seat paired; a wireless base station selecting unit selecting a wireless base station to be connected on the basis of position information; and a directivity switching unit changing directivity of the receiving antenna on the basis of position information, which transmits at least one of video information and audio information from a wireless base station to a user seated on the seat.

Abstract: A noise reduction device, including a microphone for detecting noise, a noise controller for reversing the phase of noise detected by the microphone based on information outputted from the microphone, and a speaker for outputting sound based on information outputted from the noise controller, is arranged at a seat surrounded by a shell portion having a cavity, wherein a speaker is disposed in the cavity of the shell portion.

Abstract: It includes a microphone for detecting noise emitted from a noise source, a noise controller for generating control sound signal to reduce noise detected by the microphone based on information from the microphone, and a speaker for outputting control sound based on control sound signal from the noise controller, wherein a plurality of microphones and speakers are arranged for each seat, and a plurality of microphones are arranged in higher density for each seat in a specific direction.

Abstract: An antenna device provided in a space such as an aircraft, or the like at least a part of which is surrounded with a metal, and used in a radio communication system based on a MIMO system is disclosed. The radio communication system includes a server provided in a ceiling space of a cabin of the aircraft, a connection cable, a plurality of WAPs, and a plurality of client terminals provided near passenger's seats respectively. The antenna device is used as the antennas of WAPs, and has dipole array antenna including a plurality of antennas. The antenna device capable of ensuring a good communication quality even in any location in the space at least a part of which is surrounded with the metal can be provided.

Abstract: A wireless network system arranges a plurality of access points along the aisles in a vehicle having two or more aisles. The positions of the access points on the first aisle and the positions of the access points on the second aisle are arranged in a zigzag pattern. The distance between neighboring access points is thus great, and there is no signal interference between adjacent access points.

Abstract: A noise reduction device including a noise detection microphone including a high-frequency noise detection microphone and a low-frequency noise detection microphone for respectively detecting a high-frequency noise and a low-frequency noise generated from a noise source; a noise control unit for generating a control sound signal for cancelling a noise detected by the noise detection microphone in a control center of control space; and a loudspeaker for outputting a control sound based on the control sound signal from the noise controlling unit. The high-frequency noise microphone is disposed in a vicinity of a head portion of a user in a state in which directivity in an opposite direction with respect to the control center is added, and the low-frequency noise detection microphone is disposed outside of a sound-insulating wall.

Abstract: Changing the seating configuration when there are wired connections to each seat is difficult. A wireless transmission system and method communicate wirelessly while also preventing interference with the ground communication system. The wireless transmission system wirelessly transmits data signals inside the aircraft, and has an altitude zone identification arrangement for determining in which of N altitude zones the aircraft is flying, access points that can transmit the data signals wirelessly on any one frequency band selected from among M frequency bands, client units for receiving the data signals, and a selection unit for selecting one of the M frequency bands based on the altitude zone in which the aircraft is flying. The altitude zone identification arrangement includes an aircraft altitude detection unit and system control unit, and the selection unit includes the system control unit.

Abstract: Because wired connections make changing the seating configuration difficult, a wireless client device enables stable wireless transmission. The wireless client device wirelessly transmits to and receives data signals from an access point inside an aircraft. The wireless client device has a seat unit with a seat portion on which aircraft passengers sit, an antenna for sending and receiving the data signals, a signal processing arrangement operable to handle data signal receiving and transmitting processes, and a signal output arrangement operable to output processed reception signals. The antenna arrangement, signal processing arrangement, and signal output arrangement are disposed to the seat unit.

Abstract: High-quality communication using Multicast is realized in wireless communication where re-transmission processing is performed. The present invention includes: a program distribution unit (100) for distributing a program using the Multicast communication; a first communication path (Y1) for transmitting the program distributed from the program distribution unit (100); first communication units (102a, 102b); user terminals (105a to 105h); and a second communication path (103) which is a communication path between the first communication unit (102a, 102b) and the user terminal and is also a wireless communication path where the re-transmission of a frame is performed, wherein the first communication unit (102a or 102b) selects a Multicast frame of a program requested by the user terminal (105a to 105h) from the first communication path (Y1), converts the selected Multicast frame into a Unicast frame, and transmits the converted Unicast frame to the user terminal (105a to 105h).

Abstract: Because wired connections make changing the seating configuration difficult, a wireless client device enables stable wireless transmission. The wireless client device wirelessly transmits to and receives data signals from an access point inside an aircraft. The wireless client device has a seat unit with a seat portion on which aircraft passengers sit, an antenna for sending and receiving the data signals, a signal processing arrangement operable to handle data signal receiving and transmitting processes, and a signal output arrangement operable to output processed reception signals. The antenna arrangement, signal processing arrangement, and signal output arrangement are disposed to the seat unit.

Abstract: Changing the seating configuration when there are wired connections to each seat is difficult. A wireless transmission system and method communicate wirelessly while also preventing interference with the ground communication system. The wireless transmission system wirelessly transmits data signals inside the aircraft, and has an altitude zone identification arrangement f or determining in which of N altitude zones the aircraft is flying, access points that can transmit the data signals wirelessly on any one frequency band selected from among M frequency bands, client units for receiving the data signals, and a selection unit for selecting one of the M frequency bands based on the altitude zone in which the aircraft is flying. The altitude zone identification arrangement includes an aircraft altitude detection unit and system control unit, and the selection unit includes the system control unit.

Abstract: A wireless network system arranges a plurality of access points along the aisles in a vehicle having two or more aisles. The positions of the access points on the first aisle and the positions of the access points on the second aisle are arranged in a zigzag pattern. The distance between neighboring access points is thus great, and there is no signal interference between adjacent access points.

Abstract: A network management system is provided in which a transmission band for preceding access is guaranteed even when simultaneous access to shared data is obtained by plural nodes and which does not suffer any problem even in the case of accessing to data that requires real-timeness such as with video data. In order to guarantee an I/O band for a hard disc and a band for the network when simultaneous access by plural nodes to shared data is obtained, an access manager for controlling access bands is provided inside the system, which guarantees a transmission band for preceding access on the occasion of simultaneous access by plural nodes by making mode-of-access judgment, managing the network band and the hard disc I/O transmission band, and judging whether or not to approve the access based on whether or not the bands are saturated.