Patent application number | Description | Published |
20090109936 | Terminal Control Apparatus and Radio LAN System - When prohibiting data transmission by a radio communication terminal, such as a radio communication terminal L-STA, a terminal control apparatus generates radio data including information about a data transmission prohibition time interval in an L-SIG which is a header region which each radio communication terminal can recognize in common, and, if a use state checking unit 21 has checked to see that a channel CH_a is being not used, transmits the radio data to the radio communication terminal L-STA and so on in the form of frames which the radio communication terminal L-STA can recognize by using the channel CH_a. | 04-30-2009 |
20090125778 | COMMUNICATION SYSTEM, TRANSMISSION-SIDE COMMUNICATION DEVICE, AND RECEPTION-SIDE COMMUNICATION DEVICE - Within a communication system in which an ARQ control is exercised, in a transmission-side communication apparatus | 05-14-2009 |
20100014463 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TERMINAL STATION, WIRELESS BASE STATION, AND WIRELESS COMMUNICATION METHOD - A first wireless terminal station transmits beam transmission direction identification information in all directions. A second wireless terminal station receives the transmission direction identification information, combines reception direction identification information and the transmission direction identification information, and transmits directivity direction combination information to a wireless base station. The first and the second wireless terminal stations form directional beams in directions indicated by the directivity direction combination information to thereby perform a direct communication. | 01-21-2010 |
20100016023 | RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - A base station of a radio communication system emits a radio wave having the same frequency by time division toward a plurality of specific areas from a plurality of antenna elements by using a multiple-beam antenna to form a plurality of spot beams, and transmits broadcast information through a plurality of beacon channels. Upon reception of the broadcast information, a terminal that exists in any one of the plurality of specific areas selects an optimum beacon channel, and transmits a communication establishment request and a bandwidth request to the base station through a request channel corresponding to information for identifying the antenna element, which is included in the broadcast information received through the selected optimum beacon channel. Upon reception of the requests, the base station schedules, when a channel is to be allocated, a channel allocation time including downlink and uplink data bandwidths and the like. | 01-21-2010 |
20110243117 | BASE STATION AND WIRELESS TERMINAL - A combination-information creating unit creates combination information for determining a maximum number of combinations or a maximum frame length according to a usable radio band and a modulation method and combination possibility information for indicating that a combination of frames is possible. A frame combining unit combines a plurality of frames received from an outside access line, based on the combination information, the combination possibility information, and predetermined packet information. A frame dividing unit divides a combined frame included in a received radio signal into individual frames. | 10-06-2011 |
20130010830 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - A BT apparatus unit configured to perform Bluetooth (registered trademark) communication, a WLAN apparatus unit configured to perform WLAN communication, and an information managing unit configured to acquire a WLAN communication frequency band, which is a frequency band used for the WLAN communication, from the WLAN apparatus unit, determine an unusable frequency band based on the acquired WLAN communication frequency band, and notify the BT apparatus unit of the determined unusable frequency band. The BT apparatus unit performs frequency hopping using a frequency band excluding the unusable frequency band. | 01-10-2013 |
20130169481 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A wireless communication apparatus includes a BT-apparatus unit configured to perform wireless communication using frequency hopping, a WLAN-apparatus unit configured to perform wireless communication in a system different from a system of the BT-apparatus unit using a band including at least a part of a band used by the BT-apparatus unit and using a WLAN-antenna whose directionality is controllable, and an information managing unit configured to, upon detecting simultaneous communication of the BT-apparatus unit and the WLAN-apparatus unit, instruct the WLAN-apparatus unit to perform communication while adjusting a beam direction of the WLAN-antenna and instruct the BT-apparatus unit to measure a communication quality, determine a directionality setting value of the WLAN-antenna based on the communication quality measurement by the BT-apparatus unit, and instruct the WLAN-apparatus unit to perform communication using the determined directionality setting value. | 07-04-2013 |
20130308685 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION SYSTEM, AND FREQUENCY ALLOCATION METHOD - A composite wireless device including a WLAN device and a BT device. The composite wireless device includes a wireless-channel control unit that determines usable FH channels that can be used for frequency hopping of the BT device, based on communication quality information of the WLAN channel, and notifies the BT device of the usable frequency bands, and a BT-communication control unit that acquires communication quality information of an extended frequency band, which is a frequency band other than the usable frequency bands, as extended communication quality information. The wireless-channel control unit adds the FH channels in the WLAN channel, which are determined as being unused based on the extended communication quality information, as the usable FH channels. | 11-21-2013 |
20140378179 | RADIO COMMUNICATION APPARATUS - An in-vehicle apparatus that is a radio communication apparatus includes: a radio communication unit capable of performing radio communication using at least a 5-GHz band; a present-position detecting unit that detects a present position of the own apparatus; and a radio-communication-zone predicting unit that determines, when the radio communication unit is performing communication, whether switching of a channel of the radio communication unit is necessary on a basis of interference data, which is information concerning a coverage of a radio wave transmitted from another system that uses a 5-GHz band and transmits and receives a radio wave in a stationary state, map data, and the present position detected by the present-position detecting unit, and, when switching is necessary, further selects a switching destination channel or causes the radio communication unit to select the switching destination channel. | 12-25-2014 |