Methods and apparatuses for handling beam failure
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsStephen Grant, Mattias Frenne, Andreas Nilsson, Claes Tidestav
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Abstract
Some embodiments of this disclosure provide a method performed by one or more transmission points, TRPs, for communicating with a user equipment, UE. In some embodiments, the method includes: using a first transmit, TX, beam to communicate with the UE; receiving, from the UE, information indicating that the UE has determined that the first TX beam has experienced a beam failure; and after the information is received, using a second TX beam to communicate with the UE.
Claims17
A user equipment (UE), the UE comprising:
- a transmitter;
- a receiver;
- a memory;
- and
- a data processing system comprising one or more processors, wherein the UE is adapted to:
- based on measurements of reference signals transmitted by a serving base station (gNB) using a first transmit (TX) beam, determine whether a beam failure has occurred;
- and
- as a direct result of determining that the beam failure has occurred, the UE transmitting to the serving gNB a beam failure message indicating that the UE has determined that the beam failure has occurred wherein
- the UE is configured to determine whether the beam failure has occurred by performing a process that comprises:
- initializing a counter;
- determining a plurality of radio link quality values based on measurements of reference signals;
- for each of the plurality of determined radio link quality values, i) determining whether the determined radio link quality value, or a function thereof, is less than a first threshold and ii) if the determined radio link quality value, or a function thereof, is less than the first threshold, then incrementing the counter;
- comparing the value of the counter to a second threshold;
- and
- based on the comparing, determining whether said value of the counter meets or exceeds the second threshold.
A method performed by a user equipment (UE), the method comprising:
- based on measurements of reference signals transmitted by a serving base station (gNB) using a first transmit (TX) beam, the UE determining whether a beam failure has occurred;
- and
- as a direct result of determining that the beam failure has occurred, the UE transmitting to the serving gNB a beam failure message indicating that the UE has determined that the beam failure has occurred, wherein the step of determining whether the beam failure has occurred comprises:
- initializing a counter;
- determining a plurality of radio link quality values based on measurements of reference signals;
- for each of the plurality of determined radio link quality values, i) determining whether the determined radio link quality value, or a function thereof, is less than a first threshold and ii) if the determined radio link quality value, or a function thereof, is less than the first threshold, then incrementing the counter;
- comparing the value of the counter to a second threshold;
- and
- based on the comparing, determining whether said value of the counter meets or exceeds the second threshold.
Dependencies are inferred from the claim text.