Systems and methods for determining transmitter and receiver configurations for a wireless device
Systems and methods of determining transmitter and receiver configurations for a wireless device are provided. In one exemplary embodiment, a method performed by a wireless device ( 105, 200, 300 a - b, 500, 605 ) in a wireless communications system ( 100 ) comprises transmitting or receiving ( 403 ) a first signal of a first type ( 113 ) using a first transmitter or receiver configuration based on a first quasi co-location (QCL) assumption ( 121 ) associating the first signal with a first reference signal ( 111 ) received by the wireless device. Further, the method includes transmitting or receiving ( 407 ) a second signal of a second type ( 117 ) using a second transmitter or receiver configuration based on a second QCL assumption ( 123 ) associating the second signal with a second reference signal ( 115 ) received by the wireless device.
1 . A method performed by a wireless device in a wireless communications system, comprising:
transmitting or receiving, by the wireless device, a first signal of a first type using a first configuration based on a first quasi co-location (QCL) assumption associating the first signal with a first reference signal received by the wireless device; and
transmitting or receiving, by the wireless device, a second signal of a second type using a second configuration based on a second QCL assumption associating the second signal with a second reference signal received by the wireless device.
2 . The method of claim 1 , wherein the first reference signal is a broadcasted reference signal and the second reference signal is a user equipment (UE)-specific configured reference signal.
3 . The method of claim 2 , wherein the broadcasted reference signal is a reference signal in a synchronization signal (SS) block and the UE-specific reference signal is a channel state information reference signal (CSI-RS).
4 . The method of claim 1 , wherein the first signal is a common signal and the second signal is a user equipment (UE)-specific signal.
5 . The method of claim 1 , wherein the first and second signals are user equipment (UE) specific signals.
6 . The method of claim 1 , wherein the first reference signal is a reference signal in a preferred synchronization signal (SS) block and the first signal is a common search space or a group common search space of a physical downlink control channel (PDCCH).
7 . The method of claim 1 , wherein the first reference signal is a reference signal in a preferred synchronization signal (SS) block and the first signal is a user equipment (UE) specific search space of a physical downlink control channel (PDCCH).
8 . The method of claim 1 , wherein the second reference signal is a channel state information reference signal (CSI-RS) and the second signal is a demodulation reference signal (DMRS) for a user equipment (UE) specific search space of a physical downlink control channel (PDCCH).
9 . The method of claim 1 , wherein the second reference signal is a channel state information reference signal (CSI-RS) and the second signal is a user equipment (UE) specific search space of a physical downlink control channel (PDCCH).
10 . The method of claim 1 , wherein the second reference signal is a reference signal (RS) in a preferred synchronization signal (SS) block and the second signal is a physical random access channel (PRACH) signal or a beam failure recovery signal.
11 . The method of claim 1 , wherein the second reference signal is a channel state information reference signal (CSI-RS) and the second signal is a physical uplink shared channel (PUSCH) signal, a physical downlink shared channel (PDSCH) signal, or a physical uplink control channel (PUCCH) signal.
12 . The method of claim 1 , wherein at least one of:
the first configuration corresponds to a beam direction used to receive the first reference signal, and
the second configuration corresponds to a beam direction used to receive the second reference signal.
13 . The method of claim 1 , further comprising:
determining the first configuration based on the first QCL assumption, wherein said determining the first configuration includes determining a transmit precoder or receive beamforming weights to enable the transmission or reception of the first signal based on receive beamforming weights that enabled the reception of the first reference signal.
14 . The method of claim 1 , further comprising:
determining the second configuration based on the second QCL assumption, wherein said determining the second transmitter or receiver con-figuration includes determining a transmit precoder or receive beamforming weights to enable the transmission or reception of the second signal based on receive beamforming weights that enabled the reception of the second reference signal.
15 . The method of claim 1 , wherein the QCL assumption is a spatial QCL assumption.
16 . The method of claim 1 , further comprising:
receiving, by the wireless device, from a network node, an indication of the first or second QCL assumption.
17 . The method of claim 1 , wherein the first or second QCL assumption is a spatial relation between a reference signal reception by a wireless device and a transmission of a signal of a certain type by that wireless device or a QCL reference between a reference signal reception by a wireless device and a reception of a signal of a certain type by that wireless device.
18 . The method of claim 1 , further comprising:
receiving, by the wireless device, the first and second reference signals.
19 . A wireless device, comprising:
at least one processor and a memory, the memory comprising instructions executable by the at least one processor whereby the wireless device is configured to:
transmit or receive a first signal of a first type using a first configuration based on a first quasi co-location (QCL) assumption associating the first signal with a first reference signal received by the wireless device; and
transmit or receive a second signal of a second type using a second configuration based on a second QCL assumption associating the second signal with a second reference signal received by the wireless device.