Patent application number | Description | Published |
20100202387 | Communication Control Method and Communication System - There is provided a communication control method comprising the steps of: providing an instruction for determining availability of usage of a second communication service using a part or whole of a spectrum assigned to a first communication service from a first communication device to a second communication device; providing an instruction for sensing a communication environment from the second communication device to a communication device located nearby; transmitting sensed data obtained by sensing a communication environment from a third communication device located near the second communication device to the second communication device; determining availability of usage of the second communication service based on the sensed data by the second communication device; transmitting a determination result on availability of usage of the second communication service from the second communication device to the first communication device; and permitting usage of the second communication service in accordance with the determination result received from the second communication device by the first communication device. | 08-12-2010 |
20100271991 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, COMPUTER PROGRAM, AND WIRELESS COMMUNICATION SYSTEM - A wireless communication apparatus includes a packet-generating section and a transmission section. The generating section is provided for generating a packet and characteristically performing symbol repetition on a preamble of the packet. The transmission section is provided for transmitting the packet subjected to the symbol repetition as a wireless signal. | 10-28-2010 |
20100273428 | Wireless Communication Apparatus, Wireless Communication Method, Computer Program, and Wireless Communication System - A wireless communication apparatus includes: a first wireless communication section performing wireless communication on the basis of a first communication mode; a second wireless communication section performing wireless communication on the basis of a second communication mode using a different frequency band from the first communication mode; a beam learning signal generation section generating a beam learning signal for specifying a beam pattern at the time of the communication based on the second communication mode and transmitting the beam learning signal from the second wireless communication section; a response information acquisition section acquiring response information responding to the transmitted beam learning signal; and a preliminary information generation section generating preliminary information so as not to cause interference among a plurality of wireless communications using the second communication mode on the basis of the response information and transmitting the preliminary information from the first wireless communication section. | 10-28-2010 |
20100302948 | COMMUNICATION DEVICE, COMMUNICATION CONTROL METHOD AND PROGRAM - There is provided a communication device including: a data acquisition unit that acquires sensed data related to a signal receiving condition in a spectrum assigned to a first communication service; a determination unit that determines which of a first area inside a service area of the first communication service where a signal receiving condition is suitable, a second area inside or in a peripheral part of the service area where a signal receiving condition is not suitable and a third area outside the peripheral part of the service area the communication device is located based on the sensed data acquired by the data acquisition unit; and a secondary usage starting unit that starts usage of a second communication service using a part or whole of the spectrum assigned to the first communication service by a procedure different depending on a kind of the area where the communication device is located determined by the determination unit. | 12-02-2010 |
20110028179 | TRANSMISSION POWER DETERMINATION METHOD, COMMUNICATION DEVICE AND PROGRAM - There is provided a method for determining an acceptable transmission power for a second communication service making secondary usage of a spectrum assigned to a first communication service, comprising the step of determining the acceptable transmission power based on quality of a radio signal required in the first communication service, an interference level or a noise level in the first communication service, and a path loss on a communication path about one or more secondary usage node that transmits a radio signal of the second communication service. | 02-03-2011 |
20110034204 | COMMUNICATION DEVICE, TRANSMISSION POWER CONTROL METHOD, AND PROGRAM - There is provided a communication device including: a communication unit that receives a beacon for a second communication service making secondary usage of a spectrum assigned to a first communication service; and a control unit that controls a transmission power to be used for transmission of a radio signal of the second communication service from the communication unit based on location data included in the beacon and indicating a location of a transmission source node of the beacon and a location of an interfered node interfered by the second communication service. | 02-10-2011 |
20110039495 | COMMUNICATION CONTROL METHOD, COMMUNICATION DEVICE, AND PROGRAM - There is provided a method of controlling communication of a second communication service making secondary usage of a spectrum assigned to a first communication service, with use of a communication device, including the steps of: receiving a radio signal transmitted for the first communication service in a first period on a time axis; determining a parameter value to be used for controlling communication of the second communication service based on the radio signal received in the first period; sensing a radio signal transmitted for the second communication service in a second period subsequent to the first period; and transmitting a beacon for the second communication service based on the parameter value in a third period subsequent to the second period when a radio signal for the second communication service is not detected in the second period. | 02-17-2011 |
20110275322 | COMMUNICATION CONTROL METHOD, COMMUNICATION DEVICE, AND PROGRAM - To start secondary use of a spectrum without causing an adverse effect on a communication service for primary usage, provided is a communication control method including the steps of acquiring data related to a communication environment surrounding a first communication device at the first communication device, determining that a second communication service using a part or whole of a spectrum assigned to a first communication service is available when the acquired data related to the communication environment satisfies a first condition, and permitting usage of the second communication service when the data related to the communication environment satisfies a second condition at the first communication device or a second communication device. | 11-10-2011 |
20120020420 | COMMUNICATION DEVICE AND COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - Suitable beam pattern control is performed while performing access control based on physical carrier sense. | 01-26-2012 |
20120039257 | COMMUNICATION APPARTUS, COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - Even when the lengths of data items to be transmitted to users are not the same, the frames multiplexed at the same time finally have the same frame length and are transmitted. | 02-16-2012 |
20120057622 | COMMUNICATION APPARATUS, COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - Appropriate communication operation is performed by employing space division multiple access in which wireless resources on a space axis are shared by a plurality of users. | 03-08-2012 |
20120099530 | COMMUNICATION APPARATUS AND METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - Communication operations are optimally conducted by applying space-division multiple access in which wireless resources on a spatial axis are shared among a plurality of users. | 04-26-2012 |
20120170481 | RELAY STATION, RELAY METHOD, AND WIRELESS COMMUNICATION DEVICE - To dynamically change an amount of communication resources to be used for relay communication. A relay station for relaying a radio signal between a base station and a mobile station is provided. The relay station includes a wireless communication unit for transmitting or receiving a radio signal in blocks individually divided in at least one of a time domain, a frequency domain, a code domain, and a space domain, and a communication control unit for causing the wireless communication unit to transmit, in one block, data contained in two or more radio signals received in different blocks by the wireless communication unit. | 07-05-2012 |
20120176962 | RELAY STATION, RELAY METHOD, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION APPARATUS - A relay node in a mobile communication network for relaying communications between a base station and a mobile terminal The relay node includes a first communication unit that communicates with the base station via a backhaul link using at least one of a first modulation method and a first multiplexing method, and a second communication unit that communicates with the mobile terminal via an access link using at least one of a second modulation method and a second multiplexing method. The relay node also includes a communication control unit that selects the at least one of the first modulation method and the first multiplexing method, or selects the at least one of the second modulation method and the second multiplexing method based on a characteristic of a link, a type of link or a type of data included in a communication signal. | 07-12-2012 |
20120224534 | COMMUNICATION APPARATUS, COMMUNICATION METHOD, COMPUTER PROGRAM AND COMMUNICATION SYSTEM - A communication apparatus to transmit a plurality of frames in a network, where each frame includes one or more symbols having a symbol length, includes a data processing unit. The data processing unit acquires an inter-frame space between two consecutive frames from the plurality of frames. The data processing unit further adjusts the inter-frame space between the two consecutive frames upon determination that the inter-frame space is not an integral multiple of the symbol length. The communication apparatus also includes a transmitter unit to transmit the adjusted consecutive frames. | 09-06-2012 |
20120315936 | COMMUNICATION CONTROL METHOD, COMMUNICATION SYSTEM, AND MANAGEMENT SERVER - A management server in a network including a first transmitting device that communicates with a first receiving device and a second transmitting device that communicates with a second receiving device. The management server includes a network interface that receives a parameter corresponding to a level of improvement of communication quality at the second receiving device, and a processor that calculates an allowable interference amount at the first receiving device based on the parameter. | 12-13-2012 |
20130084845 | COMMUNICATION DEVICE, AND COMMUNICATION METHOD AS WELL AS COMMUNICATION SYSTEM - A terminal intermittently operates while receiving paging information and other necessary information from a base station. In the terminal cycles of DRX with different lengths are combined in a hierarchy manner to determine an intermittent operation period. Upper DRX in the hierarchy has a longer cycle than lower DRX. A period using a cycle of the immediately lower DRX is determined based on information on the cycle of the upper DRX. An intermittent operation of a communication processing unit is controlled based on information on the cycle of DRX in a period using information on a cycle of the lowermost DRX. | 04-04-2013 |
20130102350 | TRANSMISSION POWER DETERMINATION METHOD, COMMUNICATION DEVICE AND PROGRAM - There is provided a method for determining an acceptable transmission power for a second communication service making secondary usage of a spectrum assigned to a first communication service, comprising the step of determining the acceptable transmission power based on quality of a radio signal required in the first communication service, an interference level or a noise level in the first communication service, and a path loss on a communication path about one or more secondary usage node that transmits a radio signal of the second communication service. | 04-25-2013 |
20130157581 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, COMPUTER PROGRAM, AND WIRELESS COMMUNICATION SYSTEM - A wireless communication apparatus includes: a first wireless communication section performing wireless communication on the basis of a first communication mode; a second wireless communication section performing wireless communication on the basis of a second communication mode using a different frequency band from the first communication mode; a beam learning signal generation section generating a beam learning signal for specifying a beam pattern at the time of the communication based on the second communication mode and transmitting the beam learning signal from the second wireless communication section; a response information acquisition section acquiring response information responding to the transmitted beam learning signal; and a preliminary information generation section generating preliminary information so as not to cause interference among a plurality of wireless communications using the second communication mode on the basis of the response information and transmitting the preliminary information from the first wireless communication section. | 06-20-2013 |
20130163520 | COMMUNICATION DEVICE, COMMUNICATION CONTROL METHOD, AND COMMUNICATION SYSTEM - Provided is a communication device within a communication network including a plurality of communication nodes, including: a reception unit that receives a data packet transmitted from a terminal device or transmitted to the terminal device; a communication control unit that selects a forwarding destination node of the data packet from a plurality of forwarding destination node candidates when the terminal device is a machine-type communication (MTC) terminal; and a transmission unit that transmits the data packet to the forwarding destination node selected by the communication control unit. | 06-27-2013 |
20130163597 | COMMUNICATION DEVICE, COMMUNICATION CONTROL METHOD, AND COMMUNICATION SYSTEM - Provided is a communication device including a communication control unit that inserts, into a destination field of a data packet, intermediate node designation information designating an intermediate node different from a destination node of the data packet on a path to the destination node, and a transmission unit that transmits the data packet into which the intermediate node designation information is inserted. | 06-27-2013 |
20130217429 | COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL METHOD, COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMMUNICATION SYSTEM - Provided is a communication control device including a communication unit configured to make communication with one or more secondary communication nodes operating a secondary system using at least one of a frequency channel allocated to a primary system and a frequency channel adjacent to the frequency channel, a determination unit configured to determine an upper limit number of secondary systems or secondary communication nodes to be allocated with transmission power, and a power allocation unit configured to allocate transmission power to each secondary system or each secondary communication node in each secondary system based on the determined upper limit number and the acceptable interference amount of the primary system. | 08-22-2013 |
20130316756 | COMMUNICATION DEVICE, TRANSMISSION POWER CONTROL METHOD, AND PROGRAM - There is provided a communication device including: a communication unit that receives a beacon for a second communication service making secondary usage of a spectrum assigned to a first communication service; and a control unit that controls a transmission power to be used for transmission of a radio signal of the second communication service from the communication unit based on location data included in the beacon and indicating a location of a transmission source node of the beacon and a location of an interfered node interfered by the second communication service. | 11-28-2013 |
20140044053 | COMMUNICATION CONTROL APPARATUS, COMMUNICATION CONTROL METHOD, PROGRAM AND COMMUNICATION SYSTEM - There is provided a communication control apparatus including a communication controller that controls communication with other communication control apparatuses, the communication exchanging information about terminal grouping to distinguish operations to a specific wireless terminal and to other wireless terminals. | 02-13-2014 |
20140050180 | COMMUNICATION CONTROL APPARATUS, COMMUNICATION CONTROL METHOD, PROGRAM, COMMUNICATION SYSTEM, AND WIRELESS TERMINAL - There is provided a communication control apparatus including a communication controller that controls cooperative communication linked to other communication control apparatuses depending on whether the communication control apparatus or the other communication control apparatuses perform terminal grouping to distinguish an operation to a specific wireless terminal and to other wireless terminals. | 02-20-2014 |
20140057668 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, COMPUTER PROGRAM, AND WIRELESS COMMUNICATION SYSTEM - A wireless communication apparatus includes: a first wireless communication section performing wireless communication on the basis of a first communication mode; a second wireless communication section performing wireless communication on the basis of a second communication mode using a different frequency band from the first communication mode; a beam learning signal generation section generating a beam learning signal for specifying a beam pattern at the time of the communication based on the second communication mode and transmitting the beam learning signal from the second wireless communication section; a response information acquisition section acquiring response information responding to the transmitted beam learning signal; and a preliminary information generation section generating preliminary information so as not to cause interference among a plurality of wireless communications using the second communication mode on the basis of the response information and transmitting the preliminary information from the first wireless communication section. | 02-27-2014 |
20140200044 | COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL METHOD, AND COMMUNICATION CONTROL SYSTEM - Provided is a communication control device including an information acquisition unit acquiring first information concerning a position a guard area for a first wireless communication system and second information concerning a position of a master node of a second wireless communication system which is secondarily operated using a frequency channel used by the first wireless communication system, a determination unit determining, using the first information and the second information acquired by the information acquisition unit, whether or not an interval between a reference point of the first wireless communication system and the master node meets a condition which depends on a width of the guard area and a communication distance assumed for the second wireless communication system, and a control unit causing the second wireless communication system to be operated with a given transmission power if the determination unit determines the interval meets the condition. | 07-17-2014 |
20140219235 | COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL METHOD, AND COMMUNICATION CONTROL SYSTEM - There is provided a communication control device including a power distribution unit configured to distribute, to one or more secondary systems, a transmission power accepted for a secondary usage of a frequency channel which is protected for a primary system, and a notification unit configured to notify each secondary system of a value of a second transmission power which is decided depending on a value of a first transmission power distributed by the power distribution unit. Upon updating the transmission power, only in a case where a value of the second transmission power which is previously notified and a value of the first transmission power which is newly distributed by the power distribution unit satisfy a predetermined condition with respect to a certain secondary system, the notification unit notifies the secondary system of a new value of the second transmission power. | 08-07-2014 |
20140233438 | ELECTRONIC DEVICE, METHOD AND COMPUTER-READABLE MEDIUM - An electronic device, a method, and a computer-readable medium. The electronic device includes a circuitry configured to receive a radio communication signal for another device, configured to determine, based on the radio communication signal, one or more features that can reflect the difference between an uplink transmission mode and a downlink transmission mode, and configured to judge whether the radio communication signal is for the uplink transmission or the downlink transmission according to the one or more features. | 08-21-2014 |
20140341150 | COMMUNICATION CONTROL DEVICE, TRANSMISSION POWER ALLOCATION METHOD AND PROGRAM - There is provided a doing apparatus including a communication control device including a power allocation unit configured to allocate transmission power for secondary use of a frequency channel protected for a primary system to a secondary system. The power allocation unit switches power allocation methods between a first group of secondary systems of which a distance from the primary system is less than a prescribed threshold and a second group of secondary systems of which a distance from the primary system exceeds the prescribed threshold. | 11-20-2014 |
20140376504 | COMMUNICATION APPARATUS, COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - Even when the lengths of data items to be transmitted to users are not the same, the frames multiplexed at the same time finally have the same frame length and are transmitted. | 12-25-2014 |