Method and apparatus of transmitting discovery signal, method and apparatus of discovering cell

  • US 10,098,058 B2
  • Filed: 07/30/2015
  • Issued: 10/09/2018
  • Est. Priority Date: 09/19/2014
  • Status: Active Grant
First Claim
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1. A method of transmitting a discovery signal, comprising:

  • determining whether a channel in an unlicensed frequency band is idle;

    transmitting the discovery signal in the channel in the unlicensed frequency band during a current cycle of a discovery signal transmission period if the channel in the unlicensed frequency band is determined to be idle; and

    not transmitting the discovery signal in the channel in the unlicensed frequency band during the current cycle if the channel in the unlicensed frequency band is determined to be not idle;

    wherein the determining whether the channel in the unlicensed frequency band is idle comprises;

    determining whether the channel in the unlicensed frequency band is idle, based on a received power of the channel in the unlicensed frequency band;

    wherein the determining whether the channel in the unlicensed frequency band is idle based on the received power of the channel in the unlicensed frequency band comprises;

    determining whether the channel in the unlicensed frequency band is idle, by comparing a total received power of the channel in the unlicensed frequency band with a first threshold, wherein if the total received power is above the first threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;

    ordetermining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a non-LTE signal in the channel in the unlicensed frequency band with a second threshold, wherein if the received power of the non-LTE signal is above the second threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;

    or determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal in the channel in the unlicensed frequency band with a third threshold, wherein if the received power of the LTE signal is above the third threshold, the channel in the unlicensed frequency band is idle, and if not, the channel in the unlicensed frequency band is not idle;

    ordetermining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a signal of an operator other than a present operator in the channel in the unlicensed frequency band with a fourth threshold, wherein if the received power of the signal of the operator other than the present operator is above the fourth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;

    ordetermining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal of an operator other than the present operator in the channel in the unlicensed frequency band with a fifth threshold, wherein if the received power of the LTE signal of the operator other than the present operator is above the fifth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle.

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