Patent
Wireless communication system compulsively turning remote terminals into inactive state
Toshihiro Yabe,Norio Sasaki +1 more
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TLDR
In this article, a wireless communication system containing at least one transmission apparatus and one communication terminal is considered, where the transmission apparatus transmits a wireless signal representing a bit sequence containing a predetermined number of bit errors, to the communication terminal. The communication terminal receives the wireless signal to regenerate the bit sequence.Abstract:
A wireless communication system containing at least one transmission apparatus and at least one communication terminal. The transmission apparatus transmits a wireless signal representing a bit sequence containing at least a predetermined number of bit errors, to the communication terminal. The communication terminal receives the wireless signal to regenerate the bit sequence. The communication terminal then examines the bit sequence represented by a received wireless signal to determine whether or not the number of bit errors contained in the bit sequence is equal to or greater than a predetermined number. When it is determined that at least the predetermined number of bit errors are contained in the bit sequence represented by a received wireless signal, the operation of the communication terminal is made inactive. Further, the transmission apparatus may transmit a wireless signal representing a bit sequence containing no pattern coinciding with a predetermined frame synchronization pattern, to the communication terminal. The communication terminal receives the wireless signal to regenerate the bit sequence. The communication terminal then examines the bit sequence represented by a received wireless signal to determine whether or not the bit sequence contains the predetermined frame synchronization pattern. When it is determined that the bit sequence does not contain the predetermined frame synchronization pattern, the operation of the communication terminal is made inactive.read more
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References
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Patent
Frequency division multiplexed acknowledge back paging system
TL;DR: In this paper, a group of addressed ack-back pagers (121, 122,...) indicate a response to their respective pagers thus providing ackback data, and then simultaneously transmit back to the central station (110) their ack back data on different frequency subbands, each of which is allocated to each of the pagers in the group.
Patent
Battery saving radio circuit and system
TL;DR: In this article, an improved battery saving circuit for radio receivers and/or radio transceivers and radio communication systems of the same under the control of one or more control radio transmitters and or transceiver is presented.
Patent
Battery saver for a paging receiver or the like
Ohyagi Takashi,Ichikawa Yoshio +1 more
TL;DR: A battery saving circuit for use in a portable radio communication apparatus adapted to receive a communication signal which includes a preamble and identification codes is described in this article, where the power supply is electrically connected to the receiver and waveform shaper sections.
Patent
Paging receiver having battery saving circuit
Sato Toshifumi,Takashi Oyagi +1 more
TL;DR: A paging receiver includes an improved battery saving circuit which reduces battery usage by powering the radio section and the waveform shaping circuitry only during intervals which include address codewords specific to the given receiver group as discussed by the authors.
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Paging apparatus having a battery saving function
Makoto C,O Patent Division Murai,Kiyoshi C,O Patent Division Wagi,Tatsuaki C,O Patent Division Sekigawa +5 more
TL;DR: In this paper, a paging apparatus having a battery saving function comprises a power supply to a radio circuit and a power-supply control circuit, and the radio circuit remains turned off without being turned on periodically for a predetermined time period in response to the detection of a specific code addressed to the paging device.