METHOD AND APPARATUS FOR TRIGGERING A BEAM STATE INFORMATION REPORT IN A WIRELESS COMMUNICATION SYSTEM
Methods and apparatuses for triggering a beam state information report by a user equipment in a wireless communication system are disclosed herein. In one method, a user equipment measures multiple beam reference signals of non-serving beams from a cell and derives multiple values from measurements. The UE derives a first value, wherein the first value is a highest value, a lowest value, or an average value of the multiple values. The UE triggers to report a measurement result for a beam reference signal if at least one condition is satisfied, wherein the condition is based on comparing the first value to a threshold.
1 . A method for a user equipment (UE), the method comprising:
measuring, by the UE, multiple beam reference signals of non-serving beams from a cell and deriving multiple values from measurements;
deriving, by the UE, a first value, wherein the first value is a highest value, a lowest value, or an average value of the multiple values; and
triggering, by the UE, to report a measurement result of a beam reference signal if at least one condition is satisfied, wherein the condition is based on comparing the first value to a threshold.
2 . The method of claim 1 , wherein the condition is satisfied when the first value is greater than the threshold.
3 . The method of claim 1 , wherein the beam reference signal is for the UE to track the condition of a downlink transmitting beam.
4 . The method of claim 1 , wherein the beam reference signal is transmitted periodically, wherein the periodic transmission of the beam reference signal is configured by the cell.
5 . The method of claim 1 , wherein the beam reference signal is transmitted aperiodically by the cell.
6 . The method of claim 1 , wherein the non-serving beam is a beam generated by the cell and is not currently used to communicate with the UE.
7 . The method of claim 1 , wherein the non-serving beam is a candidate beam of the serving beam.
8 . A method for a user equipment (UE), the method comprising:
measuring, by the UE, multiple beam reference signals of serving beams from a cell and deriving multiple values from measurements;
deriving, by the UE, a first value, wherein the first value is a highest value, a lowest value, or an average value of the multiple values; and
triggering, by the UE, to report a measurement result of a beam reference signal if at least one condition is satisfied, wherein the condition is based on comparing the first value to a threshold.
9 . The method of claim 8 , wherein the condition is satisfied when the first value is lower than the threshold.
10 . The method of claim 8 , wherein the beam reference signal is for the UE to track the condition of a downlink transmitting beam.
11 . The method of claim 8 , wherein the beam reference signal is transmitted periodically, wherein the periodic transmission of the beam reference signal is configured by the cell.
12 . The method of claim 8 , wherein the beam reference signal is transmitted aperiodically by the cell.
13 . The method of claim 8 , wherein the serving beam is a beam generated by the cell and is currently used to communicate with the UE.
14 . A method for a user equipment (UE), the method comprising:
measuring, by the UE, a beam reference signal from a cell; and
triggering, by the UE, to report a measurement result of a beam reference signal when a serving beam is added, changed, or released.
15 . The method of claim 14 , wherein the serving beam being added, changed, or released is based on an indication from a network node.
16 . The method of claim 14 , wherein the beam reference signal is used by the UE to track the condition of a downlink transmitting beam.
17 . The method of claim 14 , wherein the beam reference signal is transmitted periodically, wherein the periodic transmission of the beam reference signal is configured by the cell.
18 . The method of claim 14 , wherein the beam reference signal is transmitted aperiodically by the cell.
19 . The method of claim 14 , wherein the serving beam is a beam generated by the cell and is currently used to communicate with the UE.