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Mobile communication system, user terminal, and processor for assigning radio resources for transmission of sounding reference signals and device to device communication resources

  • US 9,923,689 B2
  • Filed: 07/23/2013
  • Issued: 03/20/2018
  • Est. Priority Date: 07/27/2012
  • Status: Active Grant
First Claim
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1. A mobile communication system, comprising:

  • a radio terminal that;

    performs uplink communication with a base station by transmitting a first signal to the base station, the first signal using radio resources having a time dimension and a frequency dimension, the first signal also containing sounding reference signals, andperforms Device to Device (D2D) communication with another radio terminal by transmitting a second signal to the another radio terminal, the second signal also using radio resources having a time dimension and a frequency dimension, wherein a frequency range of the first signal is different from a frequency range of the second signal, whereinin response to a situation when sounding reference signals in a given subframe of the first signal simultaneously occur in both the frequency range of the first radio signal and the frequency range of the second radio signal, the radio terminal stops transmitting only those sounding reference signals in the given subframe that occur in the frequency range of the second radio signal and continue transmitting those sounding reference signals in the given subframe that occur in the frequency range of the first radio signal.

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