Abstract: Provided is an initiator apparatus that, when issuing access requests for remote access via wireless communication to a storage section that processes only one access request at a time, can easily detect timeouts with one timer irrespective of the number of access requests issued via wireless communication. In this apparatus, an access-request processor (102) sends one or more access requests to a target apparatus (110) provided with a storage section that processes only one access request at a time and receives access acknowledgments for the access requests from the target apparatus (110). Until all the access requests are completed, a timeout detector (103) resets the timer operation and starts it again each time an access request is sent or an access acknowledgment is received, and detects a timeout when the timer operation exceeds a timeout period.

Abstract: A transport header analyzing unit (133) analyzes, on the basis of the TCP header of transport data transmitted from a transmitter terminal (100) to a receiver terminal (200), whether the transport data is an acknowledgement response in a TCP communication. If the transport data is not an acknowledgement response, a synchronization pre-processing unit (134) determines, on the basis of the TCP header of the transport data, whether synchronization information, which is required to operate in a power saving mode together with an access point (300), is added to the IP header of the transport data. A synchronization information processing unit (235) adds, to the IP header of the transport data indicating an acknowledgement response to received data that is received from the transmitter terminal (100), the synchronization information that is required to operate in the power saving mode together with the access point (300).

Abstract: A functional device can communicate with an access apparatus through wireless communication. At least one additional device can be connected to the functional device. The functional device includes an access controller that performs an initialization process of the additional device to obtain characteristic information of the additional device from the additional device, before establishing communication between the access apparatus and the functional device, a memory that stores the obtained characteristic information, a communication unit that performs transmission and reception of data with the access apparatus, and a communication controller that transmits the characteristic information stored in the memory to the access apparatus without performing an initialization process of the additional device, upon establishment of communication with the access apparatus by the communication unit.

Abstract: An objective of the present invention is to determine a function of each communication apparatus with few steps. A first communication apparatus (100) is capable of carrying out at least one of a function of an apparatus which receives an access thereto from a second communication apparatus (200), and a function of a host which accesses the second communication apparatus (200). The first communication apparatus (100) comprises: an access request issuing unit (140) which issues a request which denotes the function thereof to the second communication apparatus (200); and a conflict assessment unit (150) which, either when the request and a request which the second communication apparatus (200) has issued conflict or when the request is rejected, makes the access request issuing unit (140) reissue a request to the second communication apparatus (200) which denotes another function.

Abstract: A portable terminal wherein the amount of processing and power consumption when performing repair is reduced and video data can be reliably repaired, and video data repair method and program of the same. The portable terminal is provided with a video data repairer that repairs video data in which video is poor by replacing it with a portion of video data acquired from an external source, said video data repairer saving, without deleting at the time of repairing, all of partial video data necessary to decode subsequent video data continuing after the video data to be repaired, and performing control so that only the portion of the video data that is repaired is re-encoded.

Abstract: A TCP transmission control device and a method of controlling a TCP transmission are provided that achieve greater efficiency of TCP transmission processes for applications that use intermittent transmission methods. A communication terminal includes a TSO control unit, which determines whether a TCP session open for data transmission is using a TCP segment link transmission process. The communication terminal also includes a link management unit, which manages all information consisting of the session identifiers employed in TCP sessions, and link transmission processing usage information and maximum number of TCP segment links notified from the TSO control unit, on a per TCP session basis.

Abstract: This electrical power-receiving apparatus makes it possible to suppress a decline in power supply efficiency in a variety of different circumstances while avoiding an increase in circuit scale. This apparatus comprises an impedance control unit (307) for sequentially switching through any one of a plurality of charging devices in a charging device group (310), as candidate charging devices for a supply destination to which electrical power is to be supplied. The impedance control unit (307) also selects from the candidates a charging device to which electrical power is actually supplied, on the basis of the difference between the impedance of the charging device group (310) for each candidate and the impedance of an electrical power receiving antenna unit (301), and causes electrical power to be supplied to the selected charging device.

Abstract: A radio communication apparatus is disclosed that increases the speed of arrival-guaranteed data communication with another radio communication apparatus. The radio communication apparatus includes a MAC layer section and a protocol adaptation layer (PAL) section located higher than the MAC layer. The protocol adaptation layer section indicates, to the other radio communication apparatus, a virtual value greater than an actual size of a receiving buffer memory shared with the MAC layer, before starting reception of data. The protocol adaptation layer section writes the data received from the other radio communication apparatus and stored, to a data storage section from the receiving buffer memory. The protocol adaptation layer section generates a PAL acknowledgment and transmits the acknowledgment to the other radio communication apparatus when a total size of the written data reaches the virtual value.

Abstract: A secure communication device for high-speed encryption/decryption authentication including network stack processing. An encryption/decryption authentication controller of the secure communication device acquires the result of processing of the encrypted/decrypted or authenticated previous packet from an encryption/decryption authenticator and controls a network protocol processor so that the second half of the processing of the network protocols of the previous packet and the first half of the processing of the network protocols of the current packet are continuously performed.

Abstract: A protocol delay measuring device prevents an increase of the processing overhead of a communication terminal attributed to a protocol delay measurement. The measuring device determines the protocol delay by using first and second timestamps created respectively before and after a processed packet is obtained from an unprocessed packet by IPsec processing by the communication terminal. An acknowledges creates an identifier of the unprocessed packet. A timestamp database stores the created identifier along with the first timestamp and writes the identifier in a storage where the identifier is kept the same before and after the IPsec processing by the communication terminal. A correlator reads the identifier from the storage and extracts the first timestamp stored along with the same identifier as the read identifier in the timestamp database. A calculator calculates the difference between the extracted first timestamp and the second timestamp as the protocol delay.

Abstract: Provided is an initiator apparatus that, when issuing access requests for remote access via wireless communication to a storage section that processes only one access request at a time, can easily detect timeouts with one timer irrespective of the number of access requests issued via wireless communication. In this apparatus, an access-request processor (102) sends one or more access requests to a target apparatus (110) provided with a storage section that processes only one access request at a time and receives access acknowledgments for the access requests from the target apparatus (110). Until all the access requests are completed, a timeout detector (103) resets the timer operation and starts it again each time an access request is sent or an access acknowledgment is received, and detects a timeout when the timer operation exceeds a timeout period.

Abstract: An objective of the present invention is to determine a function of each communication apparatus with few steps. A first communication apparatus (100) is capable of carrying out at least one of a function of an apparatus which receives an access thereto from a second communication apparatus (200), and a function of a host which accesses the second communication apparatus (200). The first communication apparatus (100) comprises: an access request issuing unit (140) which issues a request which denotes the function thereof to the second communication apparatus (200); and a conflict assessment unit (150) which, either when the request and a request which the second communication apparatus (200) has issued conflict or when the request is rejected, makes the access request issuing unit (140) reissue a request to the second communication apparatus (200) which denotes another function.

Abstract: A functional device can communicate with an access apparatus through wireless communication. At least one additional device can be connected to the functional device. The functional device includes an access controller that performs an initialization process of the additional device to obtain characteristic information of the additional device from the additional device, before establishing communication between the access apparatus and the functional device, a memory that stores the obtained characteristic information, a communication unit that performs transmission and reception of data with the access apparatus, and a communication controller that transmits the characteristic information stored in the memory to the access apparatus without performing an initialization process of the additional device, upon establishment of communication with the access apparatus by the communication unit.

Abstract: A functional device can communicate with an access apparatus. The functional device includes an access controller that controls an additional device and obtains characteristic information of the additional device at an initialization process of the additional device, a memory that stores the obtained characteristic information, a communication unit that transmits and receives data to and from the access apparatus, and a communication controller that transmits the characteristic information stored in the memory to the access apparatus, when receiving a request for the initialization process from the access apparatus through the communication unit after transferring an exclusive right to the access apparatus, the exclusive right being a right to exclusively control the additional device.

Abstract: A wireless communication device is quickly connectable to an access point of a destination service area without wasting power when the wireless communication device moves from a service area to a different one. When a state change detector of the wireless communication device detects that the received radio field intensity of the radio wave from the connected access point lowers to a threshold or less, a service area information acquirer acquires information on the service area where the wireless communication device is present and information on a neighboring service area. A profile information acquirer acquires profile information corresponding to the service area information. A priority order setter sets the order of priority to the acquired profile information in such a way that the access point of a neighboring service area neighboring to the service area formed by the connected access point is precedingly connected.

Abstract: A transport header analyzing unit (133) analyzes, on the basis of the TCP header of transport data transmitted from a transmitter terminal (100) to a receiver terminal (200), whether the transport data is an acknowledgement response in a TCP communication. If the transport data is not an acknowledgement response, a synchronization pre-processing unit (134) determines, on the basis of the TCP header of the transport data, whether synchronization information, which is required to operate in a power saving mode together with an access point (300), is added to the IP header of the transport data. A synchronization information processing unit (235) adds, to the IP header of the transport data indicating an acknowledgement response to received data that is received from the transmitter terminal (100), the synchronization information that is required to operate in the power saving mode together with the access point (300).

Abstract: This electrical power-receiving apparatus makes it possible to suppress a decline in power supply efficiency in a variety of different circumstances while avoiding an increase in circuit scale. This apparatus comprises an impedance control unit (307) for sequentially switching through any one of a plurality of charging devices in a charging device group (310), as candidate charging devices for a supply destination to which electrical power is to be supplied. The impedance control unit (307) also selects from the candidates a charging device to which electrical power is actually supplied, on the basis of the difference between the impedance of the charging device group (310) for each candidate and the impedance of an electrical power receiving antenna unit (301), and causes electrical power to be supplied to the selected charging device.

Abstract: A data transmission device (100) is provided with a transmission amount analysis unit (103) for analyzing the transmitted packet data amount with respect to a transmission window size which has been set by a transmission window size setting unit (102); a transmission parameter designation unit (104) for designating, according to the ratio of the transmitted packet data amount with respect to the transmission window size, different transmission powers, modulation methods, and code ratios for a transmission parameter setting unit (107); the transmission parameter setting unit (107) for setting the parameters that have been designated by the transmission parameter designation unit (104); and a transmission control unit (110) for reading transmission data from a transmission buffer (101) and transmitting the transmission data on the basis of the settings of the transmission parameter setting unit (107).

Abstract: An encryption device, a decryption device, an encryption method, and a decryption method effectively perform encryption and decryption by using a packet type judgment result. An encryption/decryption device includes a packet reception unit that acquires a packet, a first encryption engine that is formed by hardware and encrypts or decrypts a packet; and a second encryption engine that encrypts or decrypts a packet by using software. The encryption/decyption device also includes a head data identification unit that judges the real time feature of the acquired packet according to the header information on the acquired packet, and an encryption/decryption process judgment unit that decides the acquired packet encryption destination or decryption destination in accordance with the real time feature from the first encryption engine and the second encryption engine.

Abstract: A TCP transmission control device and a method of controlling a TCP transmission which achieve greater efficiency of TCP transmission processes for applications that use intermittent transmission methods. A communication terminal (100) comprises a TSO control unit (102) which determines whether a TCP session open for data transmission is using a TCP segment link transmission process, and a link management unit (103) which manages all information consisting of the session identifiers (202) employed in TCP sessions, and link transmission processing usage information and maximum number of TCP segment links notified from the TSO control unit (102), on a per TCP session basis.