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Method for sending channel reservation signal and base station

  • US 10,735,998 B2
  • Filed: 06/22/2018
  • Issued: 08/04/2020
  • Est. Priority Date: 12/24/2015
  • Status: Active Grant
First Claim
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1. A method for sending a channel reservation signal, the method comprising:

  • detecting, by a base station, whether a system signal is received at the base station on an unlicensed channel, wherein the system signal is a wireless fidelity (WiFi) signal in a WiFi system;

    performing, by the base station, clear channel assessment (CCA) based on detecting that the system signal is received on the unlicensed channel,wherein the CCA is started by the base station in a cell on/off mechanism,wherein the CCA is started in N subframes prior to a moment at which a licensed-assisted access (LAA) system, to which the base station belongs, enters a cell-on state, andwherein a duration of the N subframes is a transmit opportunity (TXOP) in the WiFi system; and

    sending, by the base station, a channel reservation signal on the unlicensed channel to reserve the unlicensed channel based on the CCA indicating that the unlicensed channel is idle.

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