| Patent application number | Description | Published |
|---|
| 20080285514 | Wireless Communication Apparatus, Method and Program Storage Medium - A wireless communication apparatus having a wireless communication function capable of using a plurality of transmission rates. The wireless communication apparatus includes utilization-factor calculation means for calculating a utilization factor of a wireless transmission path through which wireless communication is performed using the wireless communication function; and determination means for determining a transmission rate at least on the basis of the utilization factor calculated by the utilization-factor calculation means. | 11-20-2008 |
| 20090010241 | Transmission Device, Transmission Method, and Computer-Readable Medium - A transmission device transmits data to a certain communication device among multiple communication devices connected over a wireless network in wireless communication capable of using multiple transmission rates. The transmission device includes first transmitting means for transmitting a first packet to the certain communication device during a transmission inhibited period; receiving means for receiving a second packet including information indicating a communication environment at reception of the first packet at the certain communication device from the certain communication device; and second transmitting means for transmitting a third packet to the certain communication device at a transmission rate appropriate for the information that is included in the received second packet and that indicates the communication environment. The data length of the certain data included in the first packet is shorter than that of the data included in the third packet. | 01-08-2009 |
| 20090059792 | Wireless Communication Device, Wireless Communication System, Wireless Communication Method, and Program - A bandwidth-reservation wireless communication device that performs communication with a communication destination node connected thereto via a wireless communication network includes a traffic amount estimation unit configured to estimate an amount of traffic involved in receiving response data from the communication destination node, and a media resources reservation unit configured to reserve media resources on the basis of the estimated amount of traffic. | 03-05-2009 |
| 20090086696 | Wireless Transmission Device, Wireless Transmission Method, Wireless Communication System, and Program - A wireless transmission device according to the present invention includes a packet transmission portion, a Block ACK receiving portion, a retransmission control portion, and a transmission rate revision portion. The packet transmission portion transmits a plurality of packets to a receiving terminal. The Block ACK receiving portion receives a Block ACK that is received from the receiving terminal after the plurality of the packets are transmitted. The retransmission control portion determines a plurality of the packets to be consecutively transmitted, based on the Block ACK. The transmission rate revision portion revises a transmission rate that is used when the plurality of the packets are consecutively transmitted from a value that is normally used in accordance with a wireless channel quality. | 04-02-2009 |
| 20090124211 | INFORMATION PROCESSING APPARATUS AND COMMUNICATION APPARATUS - The present invention relates to an information processing apparatus and a communication apparatus for accurately recognizing at the base station the current receiving quality of the mobile terminals for improving the throughput of the base station. A mobile terminal | 05-14-2009 |
| 20090168689 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION METHOD, AND PROGRAM - A wireless communication system is provided that includes a first wireless communication device, a second wireless communication device, and a base station. The first and second wireless communication devices perform one of indirect communication via the base station and direct communication not passing via the base station. The first wireless communication device obtains the type of communication function with which the second wireless communication device is compatible, and transmits a data frame using at least one of the communication functions with which both the first and second wireless communication devices are compatible. The second wireless communication device measures communication quality of the data frame transmitted from the first wireless communication device for each communication function used. One of the first wireless communication device and the second wireless communication device, based on the communication quality, determines whether to perform one of the indirect communication and the direct communication. | 07-02-2009 |
| 20090168736 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION METHOD, AND PROGRAM - A wireless communication system is provided that includes a first wireless communication device, a second wireless communication device, and a base station that relays wireless communication between the first and second wireless communication devices. The first wireless communication device is capable of direct communication with another wireless communication device, and transmits a first data frame of a particular frame type to the second wireless communication device via the base station. If the second wireless communication device is capable of the direct communication, when receiving the first data frame of the particular frame type, the second wireless communication device transmits a second data frame of the particular frame type via the base station. When the first wireless communication device receives the second data frame from the second wireless communication device, it determines that the second wireless communication device is capable of the direct communication. | 07-02-2009 |
| 20090268653 | Wireless Communication System, Wireless Communication Apparatus, Wireless Communication Method, and Program - A wireless communication apparatus according to the invention includes a first wireless communication apparatus (STA1) which transmits search data to a second wireless communication apparatus (STA2) connected through an access point in a wireless communication network and determines whether a direct link setup to the second wireless communication apparatus (STA2) is possible based on search response data returned from the second wireless communication apparatus (STA2), and the second wireless communication apparatus (STA2) which receives the search data and transmits the search response data to the first wireless communication apparatus (STA1) when the second wireless communication apparatus (STA2) is compliant with the direct link setup. | 10-29-2009 |
| 20100039982 | Wireless Communication Device, Communication System, Communication Control Method, and Program - A wireless communication device includes a control unit that controls data communication, and a memory that stores communication data. The control unit controls a switch between a direct link path that is a direct communication path with a communication party, and a relay-point-routed path that is a communication path routed via a relay point. The control unit transmits a communication path switch request to the communication party, and on condition of reception of an acceptance response from the communication party, the control unit starts data communication using a switched communication path. | 02-18-2010 |
| 20100040007 | Wireless Communication Device, Communication System, and Communication Control Method, and Program - A wireless communication device includes a control unit for performing a processing on communication data and a memory storing the communication data, in which the control unit performs a processing on data received via a direct link path and a path via a relay point, stores the data received via the respective paths in plural reorder buffers corresponding to the communication paths set in the memory, after a communication path switch decision processing, stores data from a new channel in a new channel reorder buffer and prohibits transfer to a higher-level layer, and when data indicating a trailing end frame is received from an existing channel, or a stand-by time elapses, or the data stored in the reorder buffer for the new channel reaches a specified threshold, performs a transfer processing for the data stored in the reorder buffer for the new channel to the higher-level layer. | 02-18-2010 |
| 20100046430 | WIRELESS COMMUNICATION DEVICE, COMMUNICATION SYSTEM, COMMUNICATION CONTROL METHOD, AND PROGRAM - A wireless communication device includes: a control unit configured to control communication data; and memory configured to store communication data; wherein the control unit performs processing of setting a re-order buffer corresponding to a source address, for storing received data in increments of source address in the memory, storing received packets from a single data source in the re-order buffer corresponding to a source address, and arraying the packet order following sequence numbers set to the received packets. | 02-25-2010 |
| 20100254361 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION METHOD AND PROGRAM - Provided is a wireless communication device which includes a function information transmitting unit for transmitting, via a wireless communication network, function information relating to a function of the wireless communication device, a function information receiving unit for receiving function information transmitted from another device, a function information comparison unit for comparing the function information of the wireless communication device and the function information received from such other device, and a function determination unit for determining which of the wireless communication device and such other device is to play a function of an access point, based on a result of the comparison by the function information comparison unit. | 10-07-2010 |
| 20100260158 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION METHOD AND PROGRAM - Provided is a wireless communication device which includes a notification information transmitting unit for transmitting, via a wireless communication network, notification information of the wireless communication device, a notification information receiving unit for receiving notification information transmitted from another device, a frequency switching unit for successively switching, at random cycles, a frequency at which the notification information is transmitted or a frequency at which the notification information is received, and a transmission processing unit for performing a data transmission process after transmitting or receiving an acknowledgement to the notification information to/from such other device. | 10-14-2010 |
| 20100272083 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION METHOD, AND PROGRAM - There is provided a wireless communication device including a control-message creation/transmission-instruction unit which sends notification information via a wireless communication network and also sends response information in the case of receiving notification information sent from another device, a reception/interpretation processing unit which receives, from another device which has received the notification information of the wireless communication device, response information of such other device and also receives the notification information sent from such other device, and an operation mode determination unit which determines, based on operation mode determination information included in the notification information of such other device or the response information of such other device, that the wireless communication device is caused to operate as one of a master device and a slave device. | 10-28-2010 |
| 20110116415 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION SYSTEM, PROGRAM AND WIRELESS COMMUNICATION METHOD - A first station for communicating with a second station is disclosed. The first station may include a storage unit configured to store relationship information defining a communication relationship between the first station and the second station. The first station may also include a communication unit configured to communicate with the second station and with an access point. The communication relationship may be maintained when the communication unit begins communicating with the access point. | 05-19-2011 |
| 20110116425 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION METHOD, AND PROGRAM - Provided is a radio communication system including a first radio communication device, and a second radio communication device that communicates with a radio communication device operating as a master unit and being connected, wherein the second radio communication device includes a communication unit that communicates with the radio communication device being connected, and a control unit that controls the communication unit to send a response packet to the first radio communication device when a response request packet broadcasted from the first radio communication device is received by the communication unit. | 05-19-2011 |
| 20110122835 | RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, AND PROGRAM - There is provided a radio communication device including a reception unit which receives information indicating a connection state or a communication capability of another radio communication device which the radio communication device attempts to connect to, and a selection unit which selects, depending on the information received by the reception unit, which communication is to be performed from among first communication in which a direct connection to such other radio communication device is established and direct communication with such other radio communication device is performed, second communication in which a connection to such other radio communication device via a base station is established and direct communication with such other radio communication device is performed, and third communication in which a connection to such other radio communication device via the base station is established and indirect communication with such other radio communication device via the base station is performed. | 05-26-2011 |
| 20110128946 | RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION SYSTEM, PROGRAM, AND RADIO COMMUNICATION METHOD - Provided is a radio communication device which includes a communication unit that communicates with a connected radio communication device operating as a master unit, and a control unit that, when a prescribed inquiry packet sent from another radio communication device is received by the communication unit, controls the communication unit to send a response packet containing service information indicating a service with which the radio communication device is compatible to said another radio communication device. | 06-02-2011 |
