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US 10,708,799 B2Granted
Method and apparatus for performing measurement in unlicensed band
AssigneeLG Electronics Inc.
InventorsJoonkui Ahn, Kijun Kim, Yunjung Yi, Seonwook Kim
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Abstract
Provided are a method and an apparatus for performing radio resource management (RRM) measurement in an unlicensed band. The apparatus sets a first measurement section and a second measurement section for the RRM measurement in the unlicensed band, and measures a received signal strength indicator (RSSI) during the first measurement section and the second measurement section.
Claims8
A method for performing a radio resource management (RRM) measurement in an unlicensed band, the method comprising:
- setting, by a wireless apparatus, a first measurement interval and a second measurement interval for the RRM measurement in the unlicensed band;
- and
- measuring, by the wireless apparatus, a received signal strength indicator (RSSI) during the first measurement interval and the second measurement interval,
- wherein the first measurement interval corresponds to a discovery reference signal (DRS) transmission period in which an unlicensed cell operating in the unlicensed band transmits the DRS,
- wherein the second measurement interval corresponds to a non-DRS transmission period in which the unlicensed cell does not transmit any downlink signal,
- wherein, when a DRS reception energy is greater than a threshold value, the RSSI is measured only during the first measurement interval corresponding to the DRS transmission period,
- wherein the DRS reception energy is not the same as a reference signal received power (RSRP) of the DRS,
- wherein, when the unlicensed cell is deactivated by a medium access control (MAC) signaling, the wireless apparatus assumes that the unlicensed cell does not transmit the downlink signal except for the DRS during the first measurement interval corresponding to the DRS transmission period,
- wherein the wireless apparatus detects the DRS in a discovery measurement timing configuration (DMTC) interval set by a serving cell and also detects the DRS in a time interval other than the DMTC interval, and
- wherein the time interval other than the DMTC interval corresponds to when the serving cell is deactivated.
7 more elements
An apparatus for performing a radio resource management (RRM) measurement in an unlicensed band, the apparatus comprising:
- a transceiver configured to transmit and receive a radio signal;
- and
- a processor configured to be connected to the transceiver, and configured to:
- set a first measurement interval and a second measurement interval for the RRM measurement in the unlicensed band;
- and
- measure a received signal strength indicator (RSSI) during the first measurement interval and the second measurement interval,
- wherein the first measurement interval corresponds to a discovery reference signal (DRS) transmission period in which an unlicensed cell operating in the unlicensed band transmits the DRS,
- wherein the second measurement interval corresponds to a non-DRS transmission period in which the unlicensed cell does not transmit any downlink signal,
- wherein, when a DRS reception energy is greater than a threshold value, the RSSI is measured only during the first measurement interval corresponding to the DRS transmission period,
- wherein the DRS reception energy is not same as a reference signal received power (RSRP) of the DRS,
- wherein, when the unlicensed cell is deactivated by a medium access control (MAC) signaling, it is assumed that the unlicensed cell does not transmit the downlink signal except for the DRS during the first measurement interval corresponding to the DRS transmission period,
- wherein the processor detects the DRS in a discovery measurement timing configuration (DMTC) interval set by a serving cell and also detects the DRS in a time interval other than the DMTC interval, and
- wherein the time interval other than the DMTC interval corresponds to when the serving cell is deactivated.
10 more elements
Dependencies are inferred from the claim text.