摘要:
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.
摘要:
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.
摘要:
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).
摘要:
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).
摘要:
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. According to the profile information to which orders of priority are set, a request for connection to the access point is made.
摘要:
A wireless communication device 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 detecting section (203) 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 acquiring section (204) acquires information on the service area where the wireless communication device is present and information on a neighboring service area. A profile information acquiring section (206) acquires profile information corresponding to the service area information. A priority order setting section (211) 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. According to the profile information to which orders of priority are set, a request for connection to the access point is made.
摘要:
A TCP transmission control device enables high-efficiency TCP transmission for appliance integrated service provided via a home network. A TCP destination cache control unit (206) of a transmitting terminal (200) serving as the TCP transmission control device sets TCP transmission control information used for TCP connection set up, for an internal packet network, between the transmitting terminal (200) and a receiving terminal when the receiving terminal is present in the internal packet network. The TCP destination cache control unit (206) sets the TCP transmission control information according to the type of the service realized by TCP data transmission.
摘要:
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).
摘要:
A terminal (101) includes interfaces for communication with a mobile network (102) and a wireless LAN (103). A first IMS server (107) performs IMS call control processing relating to terminals located in the mobile network (102) and a second IMS server (111) relays a signal relating to IMS call control processing concerning terminals located in the wireless LAN (103). These IMS servers search for a mobile network packet gateway (106), a packet data gateway (110), and a gateway to be controlled by a route change request for requesting change of a packet transmission path and relay the route change request. The route change request provided from the terminal (101) is relayed by the IMS servers to provide the change request to all networks specified. The packet transmission path is changed by the gateway in accordance with the request. Thus, the terminal having the interfaces for both of the mobile communication network and the wireless LAN can select a network to use for each communication port.
摘要:
It is possible to provide an encryption device, a decryption device, an encryption method, and a decryption method capable of effectively performing encryption and decryption by using the packet type judgment result. An encryption/decryption device (100) includes: a packet reception unit (111) which acquires a packet; an encryption engine (125) which is formed by hardware and encrypts or decrypts a packet; an encryption engine (115) which encrypts or decrypts a packet by using software; a head data identification unit (117) which 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 (112) decides the acquired packet encryption destination or decryption destination in accordance with the real time feature from an encryption engine (125) and the encryption engine (115). Since it is possible to separate the encryption by hardware from encryption by hardware according to the packet real time feature, it is possible to effectively perform encryption and decryption.