Patent application number | Description | Published |
20080198799 | Radio Communication System - In a wireless communication system using the contention method, collisions between transmission signals sent from terminals to a base station are avoided, and a communication area is flexibly formed while suppressing unnecessary radiation of the communication area. The base station includes antennas disposed such that wireless zones cover mutually different areas, wireless units connected to the antennas in one-to-one correspondence, and for, via the respective antennas, receiving wireless signals from the terminal stations in the wireless zones and transmitting wireless signals to the terminal stations in the wireless zones, a data processing unit for processing the wireless signals received by the plurality of wireless units and generate data to be transmitted to the terminal stations, and a communication control unit for controlling the wireless units so as to, during a slot other than a transmission request slot, form one communication area combining the wireless zones of all of the antennas, and during the transmission request slot, form mutually independent communication areas less than or equal in number to the antennas. | 08-21-2008 |
20080198835 | Wireless Transmission System And Wireless Transmission Method And Wireless Station For Use Therein - The present invention provides a wireless station capable of increasing the probability that a path diversity effect can be obtained in a case where a plurality of wireless stations transmit packets using a modulation/demodulation scheme with an anti-multipath property. A delay amount determining section ( | 08-21-2008 |
20080212706 | Transmission Method and Transmission System - A transmission device ( | 09-04-2008 |
20090036052 | WIRELESS STATION, WIRELESS TRANSMISSION METHOD FOR THE WIRELESS STATION, AND WIRELESS TRANSMISSION SYSTEM USING THE WIRELESS STATION - A wireless station according to the present invention is a wireless station used as one of a plurality of relay stations forming transmission paths, respectively, different from each other, in a wireless transmission system for transmitting a packet from a transmitting station to a receiving station through the plurality of relay stations, and the wireless station comprises: a reception section for receiving a packet transmitted from the transmitting station, and receiving a packet which is transmitted, based on the packet transmitted from the transmitting station, from a relay station other than the one of the plurality of relay stations, and is transmitted before the one of the plurality of relay stations performs transmission, by using a transmission parameter for obtaining a path diversity effect in the wireless transmission system; a transmission parameter estimation section for estimating the transmission parameter used by the relay station other than the one of the plurality of relay stations, based on the packet received by the reception section from the relay station other than the one of the plurality of relay stations; a transmission parameter selection section for selecting the transmission parameter other than the transmission parameter which is used by the relay station other than the one of the plurality of relay stations, and is estimated by the transmission parameter estimation section; and a transmission section for transmitting, to the receiving station, the packet received by the reception section from the transmitting station, by using the transmission parameter selected by the transmission parameter selection section. | 02-05-2009 |
20090097584 | WIRELESS TRANSMISSION SYSTEM, WIRELESS TRANSMISSION METHOD, AND WIRELESS STATION AND TRANSMITTING STATION USED THEREIN - The present invention provides a wireless transmission system capable of exerting a maximum path diversity effect by using combinations formed by a plurality of symbol waveforms even when a maximum number of effective branches is limited to a small number. A transmission timing controlling section ( | 04-16-2009 |
20100002666 | WIRELESS BASE STATION AND WIRELESS COMMUNICATION TERMINAL AND WIRELESS COMMUNICATION SYSTEM - Provided is a wireless communication system capable of transmitting, at a high speed, information requested by a communication terminal to the communication terminal which moves through a spot wireless area at a high speed. In an integrated base station | 01-07-2010 |
20100027522 | WIRELESS BASE STATION, WIRELESS COMMUNICATION TERMINAL, AND WIRELESS COMMUNICATION SYSTEM - Provided is a wireless communication system capable of transmitting, at a high speed, information requested by a wireless communication terminal to the wireless communication terminal which moves through a spot wireless area at a high speed. In a wireless base station | 02-04-2010 |
20100239039 | WIRELESS TRANSMISSION SYSTEM, AND WIRELESS STATION AND METHOD USED FOR SAME - A wireless transmission system capable of performing multi-station simultaneous transmission of data by wireless is provided. The wireless transmission system includes a plurality of wireless stations for transmitting and receiving data. Transmitter-side wireless stations, a multipath channel, and receiver-side wireless stations constitute a system for path diversity. At least one wireless station among the wireless stations determines, depending on a response packet with respective to a multi-station simultaneous transmission request packet transmitted by itself or other stations, a plurality of delay amounts from a reference timing during multi-station simultaneous transmission in the wireless transmission system, and a plurality of symbol waveforms that are a basis for a modulated waveform. A difference between each delay amount is set to be larger than or equal to a predetermined delay resolution for each symbol waveform, and a difference between maximum and minimum values of the delay amounts is set to be smaller than or equal to a predetermined maximum delay. | 09-23-2010 |
20120320962 | Diversity Reception Device - The diversity reception device includes an antenna switching unit configured to select and switch to a determined chain number of antennas out of a plurality of antennas; and an antenna interchange control unit configured to control the antenna switching unit to interchange an antenna. The antenna interchange control unit compares a carrier-to-noise ratio measured by a demodulation circuit of a demodulation unit of each chain, controls the antenna switching unit to sequentially switch connection with an antenna of a chain having a lowest carrier-to-noise ratio to connection with antennas connectable to the chain, and interchanges the antenna of the chain having a lowest carrier-to-noise ratio with an antenna estimated to have a highest carrier-to-noise ratio on the basis of the input level measured by the level detection unit or an antenna having a highest input level measured by the level detection unit among the connection-switched antennas. | 12-20-2012 |
20120331161 | WIRELESS BASE STATION AND WIRELESS COMMUNICATION TERMINAL AND WIRELESS COMMUNICATION SYSTEM - Provided is a wireless communication system transmitting information to a communication terminal moving through a spot wireless area. In an integrated base station, an external information communication section controls communication with a server. A contents memory section stores contents received from the server. A wireless LAN communication section communicates with the communication terminal. A control section establishes connection with the communication terminal using a first connection not requiring an authentication procedure for connection with the communication terminal, or using a second connection requiring the authentication procedure for connection with the communication terminal. An access control (restriction) section permits access from the communication terminal to the contents memory section and prohibits access to the server when a type of connection with the communication terminal is the first connection, and permits access from the communication terminal to the contents memory section and to the server in the case of the second connection. | 12-27-2012 |
20130003643 | WIRELESS BASE STATION, WIRELESS COMMUNICATION TERMINAL, AND WIRELESS COMMUNICATION SYSTEM - A wireless communication system transmits information requested by a wireless communication terminal to the wireless communication terminal moving through a spot wireless area. In a wireless base station, an external information communication control section controls communication with a server. A contents memory stores at least a part of contents received from the server. A wireless communication section communicates with the communication terminal using a predetermined communication method. A control section establishes connection with the communication terminal using a first connection which does not require an authentication procedure, or using a second connection which requires the authentication procedure. An access control (restriction) section permits access from the communication terminal to the contents memory and prohibits access to the server when a type of connection is the first connection, and permits access from the communication terminal to the contents memory and to the server in the case of the second connection. | 01-03-2013 |
20150043565 | WIRELESS BASE STATION AND WIRELESS COMMUNICATION TERMINAL AND WIRELESS COMMUNICATION SYSTEM - Provided is a wireless communication system transmitting information to a communication terminal moving through a spot wireless area. In an integrated base station, an external information communication section controls communication with a server. A contents memory section stores contents received from the server. A wireless LAN communication section communicates with the communication terminal. A control section establishes connection with the communication terminal using a first connection not requiring an authentication procedure for connection with the communication terminal, or using a second connection requiring the authentication procedure for connection with the communication terminal. An access control (restriction) section permits access from the communication terminal to the contents memory section and prohibits access to the server when a type of connection with the communication terminal is the first connection, and permits access from the communication terminal to the contents memory section and to the server in the case of the second connection. | 02-12-2015 |