Abstract: 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.

Abstract: 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.

Abstract: There is provided a content transmission apparatus including a reception unit for performing a receiving process for receiving, from a content output apparatus, a transmission instruction that is based on an output order of pieces of content data, a transmission unit for starting transmission of content data to the content output apparatus in response to the transmission instruction, and a control unit for controlling a time interval for causing the reception unit to perform the receiving process, according to wait information indicating a status of wait until transmission of the content data to the content output apparatus is to be started.

Abstract: Provided is a wireless communication device including a receiving unit that receives, from one or more than one first wireless communication devices, information indicating an order of each of the one or more than one first wireless communication devices in a queue for data communication with a second wireless communication device, an order management unit that manages an order of its own device in the queue based on the information received by the receiving unit from the one or more than one first wireless communication devices, and a transmitting unit that transmits information indicating the order of its own device in the queue managed by the order management unit.

Abstract: Provided is a wireless communication device including a communication unit, a storage unit that stores information of one wireless communication device forming a same communication group as the wireless communication device, received by the communication unit, and a control unit that discloses the information of the one wireless communication device during an information disclosure period initiated based on user operation for connecting the one wireless communication device forming the communication group and another wireless communication device and does not disclose the information of the one wireless communication device during another period.

Abstract: There is provided a communication terminal apparatus including a position information acquisition section which acquires position information indicating a current position, a velocity calculation section which calculates a moving velocity based on variations in amount and time of the position information acquired by the position information acquisition section, and a metadata acquisition section which determines a reference point to be a reference of an acquisition area of position metadata based on the position information and the moving velocity, determines an area size indicating a size of the acquisition area depending on the moving velocity, and acquires position metadata within an acquisition area specified based on the reference point and the area size from a metadata providing server that provides position metadata.

Abstract: Provided is a wireless communication device including a communication unit that communicates with another wireless communication device, a role determination unit that determines a role of either acting as a group owner or a client based on information of said another wireless communication device received by the communication unit, and a communication control unit that controls communication for forming a wireless communication group with said another wireless communication device, as a device that plays the role determined by the role determination unit.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A planar optical waveguide including a clad layer, an optical waveguide having a core embedded in the clad layer; and a groove formed in the clad layer and having a reflection interface for totally reflecting a leaked light leaked from the optical waveguide to the clad layer. Since the reflection interface for totally reflecting the leaked light is formed in the clad layer, the leaked light is prevented from entering into the tap coupler, and the variation of the branching ratio can be reduced.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: To be able to detect a plurality of correlations in a spread code cycle when receiving CDMA type signals spread with a prescribed spread code and performing correlation detections using a matched filters. A synchronicity detection device which detects a timing of a prescribed spread code already known included in a reception signal is equipped with a correlation coefficient generation means 130 which divides and generates a replica code of a spread code of a prescribed length while a phase advances at each interval of a prescribed width and matched filters 103 and 104 which perform detection of correlation values of reception signals and replica codes generated by the correlation coefficient generation means at each interval of a prescribed width.