Patent application number | Description | Published |
20080212547 | Wireless communication system, wireless communication apparatus, wireless communication method, and computer program - A wireless communication network that forms an ad-hoc network without the arrangement of a controlling station sets a period that a communication apparatus can utilize with priority and performs isochronous communication in the period as required. When isochronous communication has not been performed or after isochronous communication has finished in the priority utilization period, other communication apparatuses perform arbitrary communication. When another communication is performed in a communication apparatus's own priority utilization period, the start of isochronous communication is temporarily delayed. In an ad-hoc communication environment, data having a real-time characteristic, such as AV content, can be efficiently transmitted through the isochronous communication. | 09-04-2008 |
20080273525 | COMMUNICATION METHOD AND COMMUNICATION DEVICE AS WELL AS COMPUTER PROGRAM - Communication performed within a network including a plurality of communication stations is provided, in which when an access control is performed so that communication timing of a packet can not collide with that of another station by detecting a signal which is transmitted from another station, “a header area processed not to become easily an error such as a physical layer header portion of a packet” which is transmitted from a communication station is made to have at least information which is required for extracting information in a payload of the packet and a field for controlling an access reservation of transmission of a packet which is generated as a result of transmission of another packet so that processing using the field can be performed. | 11-06-2008 |
20090059891 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Access control based on CSMA is favorably carried out with the RTS/CTS method used together. | 03-05-2009 |
20090097440 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD AND COMPUTER PROGRAM - In order to solve problems arising when a communication system such as a wireless LAN is constructed as a decentralized distributed type network without a relationship of control station and controlled stations such as a master station and slave stations, in a wireless communication system composed of a plurality of communication stations without a relationship of control station and controlled stations, respective communication stations transmit beacons with information concerning a network written thereon with each other to construct the network, and it becomes possible to make sophisticated judgment such as communication states of other communication stations by those beacons. | 04-16-2009 |
20090097463 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD AND COMPUTER PROGRAM - In order to solve problems arising when a communication system such as a wireless LAN is constructed as a decentralized distributed type network without a relationship of control station and controlled stations such as a master station and slave stations, in a wireless communication system composed of a plurality of communication stations without a relationship of control station and controlled stations, respective communication stations transmit beacons with information concerning a network written thereon with each other to construct the network, and it becomes possible to make sophisticated judgment such as communication states of other communication stations by those beacons. | 04-16-2009 |
20090097464 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD AND COMPUTER PROGRAM - In order to solve problems arising when a communication system such as a wireless LAN is constructed as a decentralized distributed type network without a relationship of control station and controlled stations such as a master station and slave stations, in a wireless communication system composed of a plurality of communication stations without a relationship of control station and controlled stations, respective communication stations transmit beacons with information concerning a network written thereon with each other to construct the network, and it becomes possible to make sophisticated judgment such as communication states of other communication stations by those beacons. | 04-16-2009 |
20090201901 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 08-13-2009 |
20090238133 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD, COMMUNICATION SYSTEM, AND COMPUTER PROGRAM - A communication system includes a plurality of communication stations arranged to respectively transmit a beacon on which beacon time information related to a beacon received from a peripheral communication station is placed at a predetermined transmission interval and control a beacon transmission timing of its own station while a collision with the beacon transmitted from the peripheral communication station is avoided on the basis of beacon information placed on the received beacon, in which at least a part of the communication stations includes means configured to decide a priority with respect to beacons received from at least one peripheral communication station and means configured to place beacon time information of a beacon having a high priority among the received beacons on a beacon of its own station, and transmits the beacon at a predetermined transmission interval. | 09-24-2009 |
20090247094 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD, AND COMPUTER PROGRAM THEREFOR - A communication apparatus includes a transmitter for transmitting wireless signals, and a receiver for receiving wireless signals. A first communication functional unit uses the transmitter and the receiver to operate as a station in a first network operating on a first communication channel, while a second communication functional unit uses the transmitter and the receiver to operate as a station in a second network operating on a second communication channel different from that of the first network. A controller conducts time division data transfer by utilizing the respective time periods of receiver inactivity on the first and second channels in order to switch operation to the other channel and attempt to receive a signal on the corresponding other network. In so doing, the communication apparatus is able to fulfill dual roles on the networks operating on different channels with the use of a single modem. | 10-01-2009 |
20090274101 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Access control based on CSMA is favorably carried out with the RTS/CTS method used together. | 11-05-2009 |
20100002780 | SIGNAL COMPONENT DEMULTIPLEXING APPARATUS, FILTER APPARATUS, RECEIVING APPARATUS, COMMUNICATION APPARATUS, AND COMMUNICATION METHOD - A communication apparatus, a signal component demultiplexing apparatus, and a filter apparatus to reduce a load of FFT processing in a receiver in multi-carrier communication. The receiving apparatus provides a signal component demultiplexing apparatus before an FFT circuit and extracts only the required symbol series. The signal component demultiplexing apparatus has hierarchically arranged branching circuits each including a symbol delay circuit, a phase offset adjustment circuit, an adder circuit, and a subtractor circuit, one symbol string being output from the adder circuit and another symbol string being output from the subtractor circuit. | 01-07-2010 |
20100115079 | INFORMATION DISTRIBUTION SYSTEM AND METHOD, TERMINAL APPARATUS, SERVER APPARATUS, DATA RECEPTION METHOD, AND DATA TRANSMISSION METHOD - An information distribution system and method capable of averaging a traffic load over time and effectively utilizing communication facilities, wherein a terminal station 30 transmits to a contents server 10 a distribution request for desired information including information of time limit of distribution, and the contents server 10 receives the distribution request, estimates a time band where the traffic load is small in the communications system in the period until the time limit of distribution, pages the terminal station again at that period of time, and, if the terminal station is in a state able to receive the information content, transmits the requested information content to the terminal station 30 through a network node. | 05-06-2010 |
20100135195 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS AND COMMUNICATION METHOD, AND COMPUTER PROGRAM - To suitably suppress distribution delay at the time of multi-hop communication or broadcast transfer while including a communication station in a power-saving state. | 06-03-2010 |
20100135440 | SIGNAL COMPONENT DEMULTIPLEXING APPARATUS, FILTER APPARATUS, RECEIVING APPARATUS, COMMUNICATION APPARATUS, AND COMMUNICATION METHOD - A filter apparatus extracts a specific signal from a group of multi-carrier modulated signals. A complex sine wave signal is outputted in accordance with a channel to be selected. The complex sine wave signal and an input group of signals are multiplied. A specific group of signals is selected from a result of the multiplication and is rearranged along a frequency axis. | 06-03-2010 |
20100135441 | SIGNAL COMPONENT DEMULTIPLEXING APPARATUS, FILTER APPARATUS, RECEIVING APPARATUS, COMMUNICATION APPARATUS, AND COMMUNICATION METHOD - A filter apparatus extracts a specific signal from a group of multi-carrier modulated signals. A subcarrier is selected. A specific group of signals is selected from among an input group of signals in accordance with the selected subcarrier. A frequency offset of a selected signal is compensated. | 06-03-2010 |
20100142493 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD AND COMPUTER PROGRAM - The present invention eliminates a transmission-waiting operation which is unnecessary while accommodating a prioritized traffic. Although a communication station enters a transmission-disallowed state in response to detection of a signal addressed to another station in accordance with medium access control based on CSMA, if the communication station receives a frame transmitted with priority to a local station during the transmission waiting, it cancels the transmission-disallowed state, sends back a frame responding the frame transmitted with priority and effectively operates a transmission prioritized period. The communication station starts a search procedure to perform a processing of evading duplication of the transmission prioritized periods if it judges a possibility of a problem occurring in a time zone in which reception with priority is possible. | 06-10-2010 |
20100157967 | COMMUNICATION METHOD AND COMMUNICATION DEVICE AS WELL AS COMPUTER PROGRAM - Communication performed within a network including a plurality of communication stations is provided, in which when an access control is performed so that communication timing of a packet can not collide with that of another station by detecting a signal which is transmitted from another station, “a header area processed not to become easily an error such as a physical layer header portion of a packet” which is transmitted from a communication station is made to have at least information which is required for extracting information in a payload of the packet and a field for controlling an access reservation of transmission of a packet which is generated as a result of transmission of another packet so that processing using the field can be performed. | 06-24-2010 |
20100208713 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 08-19-2010 |
20100208714 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 08-19-2010 |
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 |
20110026508 | COMMUNICATION METHOD, COMMUNICATION DEVICE, AND COMPUTER PROGRAM - In order to solve a problem of an accumulation on the transmission side, a delay on the reception side, and the like at the time of transmission in a communication system such as a wireless LAN system, each communication station in a network transmits a beacon in which information with respect to the network is written and sets a state in which a reception operation is performed during periods of time before and after the transmission of the beacon signal when performing access control not to make communication timing of a packet collide with that of another station by detecting a signal transmitted from another station. With performing such processing, a system can be formed based on minimum level of transmission and reception operation when transmission and reception data does not exist in each communication station in the network, and also a data transfer can be performed with latency as small as possible in a minimum necessary level of transmission and reception operation by making a transition of a transmission and reception state in accordance with a fluctuating volume of transmission and reception data. | 02-03-2011 |
20110065379 | RELAY STATION DEVICE, BASE STATION DEVICE, MOBILE STATION DEVICE, AND RADIO COMMUNICATION SYSTEM - There is provided a relay station including a base station-relay station resource allocation request-transmission section which transmits a base station-relay station resource allocation request indicating that allocation of a base station-relay station resource is requested, the base station-relay station resource being a resource used by a radio signal transmitted/received between a base station and the relay station, to the base station using a radio signal, a base station-relay station resource allocation response-reception section which receives base station-relay station resource information indicating the base station-relay station resource from the base station using a radio signal, as a base station-relay station resource allocation response which is a response with respect to the base station-relay station resource allocation request, and a base station-relay station resource information storage section which stores the base station-relay station resource information received by the base station-relay station resource allocation response-reception section. | 03-17-2011 |
20110065466 | MOBILE STATION DEVICE, BASE STATION DEVICE, AND RADIO COMMUNICATION SYSTEM - There is provided a mobile station including a reception section which receives a radio signal from a base station, a communication information acquisition section which acquires, based on the radio signal received by the reception section, communication information which is information related to communication with the base station, a position information acquisition section which acquires position information indicating a position of the mobile station, and a transmission section which transmits the position information acquired by the position information acquisition section and the communication information acquired by the communication information acquisition section to the base station using a radio signal. | 03-17-2011 |
20110126070 | Resending Control Circuit, Sending Device, Resending Control Method and Resending Control Program - A resending control circuit for controlling resending of data to be sent to a sending destination, includes: a writing unit for writing resending information generated corresponding to each of data to be resent and including the resending point-in-time of the data in memory; a reading unit for reading out the resending information from the memory; and a control unit for comparing resending point-in-time included in the oldest resending information of resending information stored in the memory with current point-in-time, and executing resending processing of data corresponding to the resending information according to the comparison result. | 05-26-2011 |
20110235559 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION METHOD, AND COMPUTER PROGRAM - An autonomously dispersed type wireless network is suitably formed with communication stations avoiding collision of beacons transmitted one to another. In the event that the range of reach of airwaves change and a receivable state is created and beacons collide, a communication station changes the beacon transmission position of itself in response to receiving a beacon from another station at a timing immediately prior to transmission to its own beacon. Also, in the event that beacon collision is exposed due to emergence of a new communication which can perform reception from two systems out of airwave range of each other, the newly-participating station requests one of the communication stations of which the beacons are colliding to change the beacon transmission timing. | 09-29-2011 |
20110316744 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - By effectively utilizing the beam pattern used at the time of the last communication, a directional link can be efficiently established, thereby reducing overhead. When establishing a link, a communication apparatus | 12-29-2011 |
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 |
20120028588 | Communication Apparatus and Communication Method, Computer Program, and Communication System - To appropriately effect a coordination with a plurality of communication parties that perform a millimeter wave communication. | 02-02-2012 |
20120044900 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - A learning on a weight of an adaptive array antenna which becomes necessary for a space division multiple access is carried out while a backward compatibility with a conventional standard is maintained. | 02-23-2012 |
20120044904 | COMMUNICATION DEVICE AND COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - A communication operation is suitably performed with application of Space Division Multiple Access in which wireless resources on a space axis are shared by a plurality of users. | 02-23-2012 |
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 |
20120063435 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - A wireless communication network that forms an ad-hoc network without the arrangement of a controlling station sets a period that a communication apparatus can utilize with priority and performs isochronous communication in the period as required. When isochronous communication has not been performed or after isochronous communication has finished in the priority utilization period, other communication apparatuses perform arbitrary communication. When another communication is performed in a communication apparatus's own priority utilization period, the start of isochronous communication is temporarily delayed. In an ad-hoc communication environment, data having a real-time characteristic, such as AV content, can be efficiently transmitted through the isochronous communication. | 03-15-2012 |
20120093137 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD AND COMPUTER PROGRAM - The present invention eliminates a transmission-waiting operation which is unnecessary while accommodating a prioritized traffic. Although a communication station enters a transmission-disallowed state in response to detection of a signal addressed to another station in accordance with medium access control based on CSMA, if the communication station receives a frame transmitted with priority to a local station during the transmission waiting, it cancels the transmission-disallowed state, sends back a frame responding the frame transmitted with priority and effectively operates a transmission prioritized period. The communication station starts a search procedure to perform a processing of evading duplication of the transmission prioritized periods if it judges a possibility of a problem occurring in a time zone in which reception with priority is possible. | 04-19-2012 |
20120170562 | COMMUNICATION METHOD, COMMUNICATION DEVICE, AND COMPUTER PROGRAM - Communication stations in a network each transmit a beacon signal that includes network information. The beacon signal sets a state in which a reception operation is performed, before and after the transmission of the beacon signal. The reception operation occurs during access control, so as to avoid collision with communication timings of packets from another communication station, by detecting signals transmitted from other communication stations. States set in the communication stations are transitioned between a transmission state and a reception state based on a fluctuating volume of transmission and reception data. Data accumulations at transmitting communication stations and delays at receiving communication stations are reduced, and low latency data transfer is achieved using minimal levels of transmission and reception operations. | 07-05-2012 |
20120230349 | COMMUNICATION METHOD AND COMMUNICATION DEVICE AS WELL AS COMPUTER PROGRAM - Communication performed within a network including a plurality of communication stations is provided, in which when an access control is performed so that communication timing of a packet can not collide with that of another station by detecting a signal which is transmitted from another station, “a header area processed not to become easily an error such as a physical layer header portion of a packet” which is transmitted from a communication station is made to have at least information which is required for extracting information in a payload of the packet and a field for controlling an access reservation of transmission of a packet which is generated as a result of transmission of another packet so that processing using the field can be performed. | 09-13-2012 |
20120236829 | METHOD FOR PERFORMING HANDOVER, USER EQUIPMENT, BASE STATION, AND RADIO COMMUNICATION SYSTEM - According to embodiments, a base station includes a radio communication unit configured to establish communication with a mobile communication terminal using a plurality of component carriers. The base station further includes a control unit configured to transmit a command to the mobile communication terminal to reduce the plurality of component carriers to one prior to handover of communication between the mobile communication terminal and the base station to another base station. | 09-20-2012 |
20120243522 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 09-27-2012 |
20120275449 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD, COMMUNICATION SYSTEM, AND COMPUTER PROGRAM - A communication system includes a plurality of communication stations arranged to respectively transmit a beacon on which beacon time information related to a beacon received from a peripheral communication station is placed at a predetermined transmission interval and control a beacon transmission timing of its own station while a collision with the beacon transmitted from the peripheral communication station is avoided on the basis of beacon information placed on the received beacon, in which at least a part of the communication stations includes means configured to decide a priority with respect to beacons received from at least one peripheral communication station and means configured to place beacon time information of a beacon having a high priority among the received beacons on a beacon of its own station, and transmits the beacon at a predetermined transmission interval. | 11-01-2012 |
20130242970 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 09-19-2013 |
20130272122 | INFORMATION DISTRIBUTION SYSTEM AND METHOD, TERMINAL APPARATUS, SERVER APPARATUS, DATA RECEPTION METHOD, AND DATA TRANSMISSION METHOD - An information distribution system and method capable of averaging a traffic load over time and effectively utilizing communication facilities, wherein a terminal station | 10-17-2013 |
20130322420 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 12-05-2013 |
20130322421 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 12-05-2013 |
20130329641 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 12-12-2013 |
20130329716 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 12-12-2013 |
20130329717 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 12-12-2013 |
20130329827 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 12-12-2013 |
20140036887 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD AND COMPUTER PROGRAM - In order to solve problems arising when a communication system such as a wireless LAN is constructed as a decentralized distributed type network without a relationship of control station and controlled stations such as a master station and slave stations, in a wireless communication system composed of a plurality of communication stations without a relationship of control station and controlled stations, respective communication stations transmit beacons with information concerning a network written thereon with each other to construct the network, and it becomes possible to make sophisticated judgment such as communication states of other communication stations by those beacons. | 02-06-2014 |
20140044100 | METHOD FOR PERFORMING HANDOVER, USER EQUIPMENT, BASE STATION, AND RADIO COMMUNICATION SYSTEM - According to embodiments, a base station includes a radio communication unit configured to establish communication with a mobile communication terminal using a plurality of component carriers. The base station further includes a control unit configured to transmit a command to the mobile communication terminal to reduce the plurality of component carriers to one prior to handover of communication between the mobile communication terminal and the base station to another base station. | 02-13-2014 |
20140044101 | METHOD FOR PERFORMING HANDOVER, USER EQUIPMENT, BASE STATION, AND RADIO COMMUNICATION SYSTEM - According to embodiments, a base station includes a radio communication unit configured to establish communication with a mobile communication terminal using a plurality of component carriers. The base station further includes a control unit configured to transmit a command to the mobile communication terminal to reduce the plurality of component carriers to one prior to handover of communication between the mobile communication terminal and the base station to another base station. | 02-13-2014 |
20140079034 | COMMUNICATION METHOD, COMMUNICATION DEVICE, AND COMPUTER PROGRAM - An electronic device forming part of a communication system includes first processing circuitry configured to receive a beacon from a counterpart device. The communication system also includes second processing circuitry that causes the counterpart device to set a transmitting and receiving operation as active state for a first operating period. | 03-20-2014 |
20140112314 | COMMUNICATION METHOD, COMMUNICATION DEVICE, AND COMPUTER PROGRAM - An electronic device includes processing circuitry configured to set a transmitting and receiving operation as active state for a first operating period and determine whether to set the transmitting and receiving operation as a state in which transmission or reception is limited after the first operating period elapses. | 04-24-2014 |
20140233531 | METHOD FOR PERFORMING HANDOVER, USER EQUIPMENT, BASE STATION, AND RADIO COMMUNICATION SYSTEM - According to embodiments, a base station includes a radio communication unit configured to establish communication with a mobile communication terminal using a plurality of component carriers. The base station further includes a control unit configured to transmit a command to the mobile communication terminal to reduce the plurality of component carriers to one prior to handover of communication between the mobile communication terminal and the base station to another base station. | 08-21-2014 |
20140348150 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - A wireless communication network that forms an ad-hoc network without the arrangement of a controlling station sets a period that a communication apparatus can utilize with priority and performs isochronous communication in the period as required. When isochronous communication has not been performed or after isochronous communication has finished in the priority utilization period, other communication apparatuses perform arbitrary communication. When another communication is performed in a communication apparatus's own priority utilization period, the start of isochronous communication is temporarily delayed. In an ad-hoc communication environment, data having a real-time characteristic, such as AV content, can be efficiently transmitted through the isochronous communication. | 11-27-2014 |
20140355577 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD AND COMPUTER PROGRAM - In order to solve problems arising when a communication system such as a wireless LAN is constructed as a decentralized distributed type network without a relationship of control station and controlled stations such as a master station and slave stations, in a wireless communication system composed of a plurality of communication stations without a relationship of control station and controlled stations, respective communication stations transmit beacons with information concerning a network written thereon with each other to construct the network, and it becomes possible to make sophisticated judgment such as communication states of other communication stations by those beacons. | 12-04-2014 |
20140362844 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded. | 12-11-2014 |
20150016391 | COMMUNICATION METHOD, COMMUNICATION DEVICE, AND COMPUTER PROGRAM - In order to solve a problem of an accumulation on the transmission side, a delay on the reception side, and the like at the time of transmission in a communication system such as a wireless LAN system, each communication station in a network transmits a beacon in which information with respect to the network is written and sets a state in which a reception operation is performed during periods of time before and after the transmission of the beacon signal when performing access control not to make communication timing of a packet collide with that of another station by detecting a signal transmitted from another station. With performing such processing, a system can be formed based on minimum level of transmission and reception operation when transmission and reception data does not exist in each communication station in the network, and also a data transfer can be performed with latency as small as possible in a minimum necessary level of transmission and reception operation by making a transition of a transmission and reception state in accordance with a fluctuating volume of transmission and reception data. | 01-15-2015 |
20150023299 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD AND COMPUTER PROGRAM - The present invention eliminates a transmission-waiting operation which is unnecessary while accommodating a prioritized traffic. Although a communication station enters a transmission-disallowed state in response to detection of a signal addressed to another station in accordance with medium access control based on CSMA, if the communication station receives a frame transmitted with priority to a local station during the transmission waiting, it cancels the transmission-disallowed state, sends back a frame responding the frame transmitted with priority and effectively operates a transmission prioritized period. The communication station starts a search procedure to perform a processing of evading duplication of the transmission prioritized periods if it judges a possibility of a problem occurring in a time zone in which reception with priority is possible. | 01-22-2015 |