Beam selection systems and methods
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsAndreas Nilsson, Fredrik Athley, Sven Petersson
Life of this patent
Estimating the term…
Abstract
During a first P3 sweep that is associated with a first TCI state and during a second P3 sweep that is associated with a second TCI state, the UE stores the RSRP for each UE RX beam for each UE panel. Then, when the UE is scheduled for a downlink transmission through a DCI pointing to two these two TCI states, instead of only selecting the UE RX beam for respective panel based on the highest RSRP, the UE also takes the hypothetical inter-stream interference in to account when selecting the UE RX beams.
Claims23
A method performed by a user equipment (UE), the method comprising:
- producing a first power value based on a reception of a reference signal (RS) transmitted using a first TRP beam and received using a first UE beam and a first antenna arrangement of the UE;
- producing a second power value based on a reception of an RS transmitted using a second TRP beam and received using the first UE beam and the first antenna arrangement;
- receiving downlink control information (DCI) for scheduling a transmission of data to the UE, the DCI comprising information with which the first and second power values are associated;
- after receiving the DCI, retrieving the first and second power values using the information in the DCI;
- calculating a first value using as inputs to the calculation the first and second power values;
- and
- using the calculated first value in a process for selecting UE beams to use to receive the scheduled transmission of data.
A user equipment (UE), the UE being adapted to:
- produce a first power value based on a reception of a reference signal (RS) transmitted using a first TRP beam and received using a first UE beam and a first antenna arrangement of the UE;
- produce a second power value based on a reception of an RS transmitted using a second TRP beam and received using the first UE beam and the first antenna arrangement;
- receive downlink control information (DCI) for scheduling a transmission of data to the UE, the DCI comprising information with which the first and second power values are associated;
- after receiving the DCI, retrieve the first and second power values using the information in the DCI;
- calculate a first value using as inputs to the calculation the first and second power values;
- and
- use the calculated first value in a process for selecting UE beams to use to receive the scheduled transmission of data.
A method performed by a user equipment (UE), the method comprising:
- producing a first power value (P_TRP1_UE1) based on a reception of a reference signal (RS) transmitted using a first TRP beam and received using a first UE receive (RX) beam;
- producing a second power value (P_TRP2_UE1) based on a reception of an RS transmitted using a second TRP beam and received using the first UE RX beam;
- producing a third power value (P_TRP1_UE2) based on a reception of an RS transmitted using the first TRP beam and received using a second UE RX beam;
- producing a fourth power value (P_TRP2_UE2) based on a reception of an RS transmitted using the second TRP beam and received using the second UE RX beam;
- receiving downlink control information (DCI) for scheduling a transmission of data to the UE using the first TRP beam and the second TRP beam, the DCI comprising information corresponding to a beam tuple consisting of the first TRP beam and the second TRP beam;
- and
- in response to receiving the DCI:
- i) obtaining a set of N throughput values, the set of N throughput values comprising:
- 1) a first throughput value calculated using the first power value and the second power value and 2) a second throughput value calculated using the third power value and the fourth power value;
- and ii) using the set of N throughput values in a process for selecting a UE RX beam from a set of UE RX beams that includes the first UE RX beam and the second UE RX beam.
Dependencies are inferred from the claim text.