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Communication device

  • US 10,506,620 B2
  • Filed: 05/24/2018
  • Issued: 12/10/2019
  • Est. Priority Date: 11/26/2015
  • Status: Active Grant
First Claim
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1. A base station, comprising:

  • a transmitter configured to transmit first information to a plurality of user devices, via a communication scheme in which communication is performed without synchronization between devices;

    a receiver configured to receive second information as a response to reception of the first information from the plurality of user devices via the communication scheme; and

    a controller, whereinthe transmitter is configured to transmit, to each of the plurality of user devices, transmission timing information for each of the plurality of user devices to designate a transmission timing of the second information,the transmitter is configured to transmit, as the transmission timing information, dedicated information determined by the base station in accordance with a propagation delay between the base station and each user device,the propagation delay for each user device is a difference between a transmission timing of a radio signal by that user device and a reception timing of the radio signal by the base station, andthe controller is configured to adjust a time length of the first information based on the propagation delay for each user device.

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