摘要:
A radio terminal capable of effectively utilizing push type distribution information is disclosed. The radio terminal is formed by a reception unit configured to receive push type distribution information from a radio base station, a location recognition unit configured to carry out a recognition related to an area in which the radio terminal is located, and a reception control unit configured to determine whether or not to receive the push type distribution information according to a recongition result of the location recognition unit, and control the reception unit according to a determination result.
摘要:
There is disclosed a multicast transmission system in which an efficient and highly reliable multicast transmission can be performed. In the multicast transmission system for performing multicast transmission to a plurality of terminal stations from a base station, when an error is detected in the terminal station, the terminal station utilizes some of sub-carriers constituting an OFDM symbol to generate and transmit a NAK signal to the base station. A level judgment section 25 in the base station resends a packet to each terminal station when a reception signal level exceeds a threshold. Since the number M of sub-carriers able to be utilized to generate the NAK signal and the number L of sub-carriers necessary for generating the NAK signal are determined based on the number of terminal stations, packet communication quality, and the like, an erroneous detection probability and detection miss probability of the NAK signal can both be lowered.
摘要:
A power feeding device includes an oscillator to generate a high frequency signal, a resonance frequency determining unit configured to determine a resonance frequency to be used for a wireless power transmission, a resonance frequency controller configured to generate a resonance parameter, a resonant circuit to generate electromagnetic inductance, and a communicating unit configured to notify a resonance frequency to the power receiving device before starting a wireless power transmission. A power receiving device includes a communicating unit configured to receive information of a resonance frequency to be used for a wireless power transmission, a resonance frequency controller configured to generate a resonance parameter, a resonant circuit to generate power, a load circuit to operate by the power, a switch to open and close a connection between the resonant circuit and the load circuit, and a determining unit configured to control the switch.
摘要:
A wireless terminal device performs first, second, and third scans in sequence to detect wireless access points; stores base station information on the detected wireless access points in a storing unit; sets a disappearance flag in base station information that correspond to a wireless access point that was detected in the first scan and not in the second scan; sets a reappearance flag in base station information that correspond to a wireless access point that was not detected in the second scan and was detected in the third scan; identifies a wireless base station corresponding to base station information in which the disappearance flag and the reappearance flag are set; and displays information on the wireless base station identified on a display unit.
摘要:
An interface control device includes a first interface, a second interface, a third interface and an interface controller. The first interface is used to communicate with a first information processing device. The second interface is used to communicate with a second information processing device. The second information processing device is different from the first information processing device. The third interface is used to communicate with a controller of a data-storage medium. The interface controller performs an interface control including transmission of an indication signal through the first interface after the communications through the second interface with the second information processing device are established. The indication signal indicates the first information processing device of the fact that communications through the second interface have been established.
摘要:
A radio communication apparatus includes: a first communication unit having a first communication coverage including a short-distance portion and a long-distance portion; a second communication unit having a second communication coverage including at least the long-distance portion; a reception detecting unit detecting that a short-distance communication request transmitted from a first communication unit of an other communication apparatus has been received by at least one of the first and second communication units; a determining unit permitting the request when the request is received by the first communication unit and not received by the second communication unit, and rejecting the request when the request is received by the second communication unit; and a communication processing unit carrying out short-distance communication with the other communication apparatus via the first communication unit when the request is permitted.
摘要:
A communication system including a first terminal device connected to first and second networks, having only a reception function with respect to the first network and transmission and reception functions with respect to the second network, the first network being a radio network according to IEEE 802.11 and the second network being a radio network slower than the first network, and a second terminal device connected to the first and second networks, having at least a transmission function with respect to the first network and transmission and reception functions with respect to the second network is disclosed. In this communication system, the first terminal device carries out a prescribed procedure required in using the first terminal as a receiving side in the first network, by carrying out communications with the second terminal device through the second network, the second terminal device transmits a prescribed information to the first network on behalf of the first terminal device, the prescribed information being an information required to be transmitted to the first network in order for the first terminal device to receive packets through the first network, and the first terminal device receives the packets through the first network.
摘要:
A wireless base station which controls joining of a plurality of wireless terminals to a wireless network, stores a maximum joining possible terminal number which indicates a maximum number of the wireless terminals of each terminal type that can join the wireless network simultaneously, and which is set in advance for each one of a plurality of terminal types that classify the wireless terminals, and a currently joining terminal number which indicates a number of the wireless terminals of each terminal type that are currently joining the wireless network, for each one of the plurality of the terminal types. Then, the wireless base station judges whether the joining of one wireless terminal of one terminal type which sent a request message to the wireless network is permitted or not, according to the maximum joining possible terminal number for the one terminal type and the currently joining terminal number stored for the one terminal type.
摘要:
In a radio communication apparatus having a plurality of transmitting and receiving functions that enable simultaneous signal transmission and reception, an arbitrary number of transmitting and receiving functions are assigned to another radio communication apparatus based on channel states.
摘要:
A wireless base station which controls joining of a plurality of wireless terminals to a wireless network, stores a maximum joining possible terminal number which indicates a maximum number of the wireless terminals of each terminal type that can join the wireless network simultaneously, and which is set in advance for each one of a plurality of terminal types that classify the wireless terminals, and a currently joining terminal number which indicates a number of the wireless terminals of each terminal type that are currently joining the wireless network, for each one of the plurality of the terminal types. Then, the wireless base station judges whether the joining of one wireless terminal of one terminal type which sent a request message to the wireless network is permitted or not, according to the maximum joining possible terminal number for the one terminal type and the currently joining terminal number stored for the one terminal type.