摘要:
Upon receiving a beacon, a terminal B sends a RTS control message to a terminal A before sending a registration request message to the terminal A. Upon receiving the RTS control message, the terminal A sends a CTS control message. The terminal B measures the time from when the RTS control message is sent to when the CTS control message is received so as to calculate the distance with the terminal A. If the distance with the terminal A is within a predetermined distance X1, the terminal B sends a registration request message to the terminal A. Similarly, the terminal A measures the distance with the terminal B, and sends a registration request acknowledgement message to the terminal B when the distance with the terminal B is within a predetermined distance X2.
摘要:
A terminal acquires a network prefix of a network connected thereto, and determines whether that network prefix is identical to an initial network prefix. When the terminal determines that the two prefixes are different, the terminal reads the network prefix of each of a destination address and a source address in a received packet. When the read network prefix is different from the initial network prefix, the terminal substitutes the initial network prefix for the read network prefix, thereby generating a pseudo header. The terminal authenticates the received packet using the generated pseudo header.
摘要:
A system and method for performing ranging and positioning as follows by using the procedure for packet transmission and reception between a sender and a recipient. A first radio set transmits packets to a second radio set as a recipient. The second radio set returns the packets without fail after the lapse of time (from the detection of packets) which corresponds to an integral multiple of a prescribed unit time. The first radio set counts, by using its counter, the time which has elapsed from its transmission of packets to its detection of packets from the second radio set. The remainder of the thus counted time after subtraction of the time taken by the second radio set from packet detection to packet return and the processing time of the first radio set itself is converted into the distance of propagation between the first radio set and the second radio set as a recipient.
摘要:
A wireless communication device is provided. The wireless communication device includes a communicate range and communicating with a destination device outside the communication range thorough at least one relay station. The wireless communication device includes power mode controlling means for performing power saving control of power supplied to the wireless communication device; forcing information holding means for holding forcing information including a forced mode flag indicating whether a forced operation instruction concerning the power saving control is enabled or disabled and a limited number of the relay stations; forcing information transmitting means for transmitting the forcing information to another wireless communication device within the communication range of the wireless communication device; and forcing-information update controlling means for updating the forcing information.
摘要:
In a rotary anode type X-ray tube apparatus, a rotary anode target model X-ray pipe is received in housing. Housing is coupled by cooler device to supply a coolant in the housing. Anode target is fixed to a rotary cylinder, which is rotatably supported by a stationary shaft. The stationary shaft is provided with an inner hollow space for guiding the coolant. The coolant guided in the housing is split into two flowing streams, and one of the streams is introduced into the space for cooling of stationary shaft.
摘要:
There is disclosed a small-sized automatic biochemical analyzer requiring reduced amounts of reagents. An original sample is transferred to diluting containers on a diluting turntable. The diluted sample is transferred to reaction containers on a reaction turntable and analyzed. The original sample is once diluted. The aliquots of sample are taken from the diluted sample. Thus, a limitation imposed by the minimum volume of liquid that the instrument can meter out can be overcome. Let N be the total number of the diluting containers on the diluting turntable. The turntable is rotated in M pitches at a time. M and N do not have any common factor.
摘要:
A transmitter which can easily suppress diffusion of a spurious signal with a simple constitution, wherein the on/off operations of the transmitting circuit and the carrier signal generating circuit are controlled by the first control signal which rises at the predetermined timing and falls at the predetermined timing, and the on/off operation of the modulator is controlled by the second control signal which gently rises at the same or later timing than the rise timing of the first control signal and gently falls at the same or earlier timing than the fall timing of the first control signal, so that a phenomenon which is similar to pulse modulation of the leaked carrier signal fc becomes hard to be generated, therefore diffusion of the spurious signal can be suppressed.
摘要:
A wireless communication network that forms an ad-hoc network without the arrangement of a controlling station sets a period that a communication apparatus can utilize with priority and performs isochronous communication in the period as required. When isochronous communication has not been performed or after isochronous communication has finished in the priority utilization period, other communication apparatuses perform arbitrary communication. When another communication is performed in a communication apparatus's own priority utilization period, the start of isochronous communication is temporarily delayed. In an ad-hoc communication environment, data having a real-time characteristic, such as AV content, can be efficiently transmitted through the isochronous communication.
摘要:
An adaptive sensing system including a passive sensor that receives electromagnetic radiation, an active sensor that emits and receives electromagnetic radiation, a detection unit that detects the presence of human beings and objects other than human beings in a region of observation, and a control unit that controls the active sensor and the passive sensor based on a result of the detection by the detection unit.
摘要:
A data processing device for processing signals received via a wireless link. The data processing device including a first beam steering and/or forming antenna arranged on the data processing device that receives data via the wireless link, a second beam steering and/or forming antenna arranged on the data processing device perpendicular to the first beam steering and/or forming antenna, the second beam steering and/or forming antenna receiving data via the wireless link. The data processing device also includes a processor that processes signals received by the first and second beam steering and/or forming antennas.