Quasi-colocation of system access and control signals
According to some embodiments, a method for use in a network node comprises: determining a quasi-colocation (QCL) status between a reference signal (e.g., initial access signal such as system synchronization block (SSB), or a tracking reference signal (TRS)) and a control signal (e.g., a paging signal, a random access response (RAR), or a channel such as physical downlink control channel (PDCCH) or physical downlink shared channel (PDSCH)); and signaling the QCL status to a wireless device. A method for use in a wireless device may comprise: receiving a QCL status between a reference signal and a control signal; receiving the reference signal; estimating one or more signal parameters based on the received reference signal; and when the reference signal and the control signal are QCL, receiving the control signal using the estimated signal parameters to optimize reception of the control signal.
1. A method for use in a wireless device, the method comprising:
receiving a quasi-colocation (QCL) status between a reference signal and a control signal;
receiving the reference signal;
estimating one or more signal parameters based on the received reference signal;
when the QCL status indicates the reference signal and the control signal are quasi-colocated, receiving the control signal using the estimated signal parameters to optimize reception of the control signal in terms of at least one of energy efficiency and performance;
when the QCL status indicates the reference signal and the control signal are not quasi-colocated, receiving the control signal using estimated signal parameters of a different reference signal; and
wherein the reference signal comprises a synchronization signal block (SSB) and the different reference signal comprises a tracking reference signal (TRS).
2. A wireless device comprising processing circuitry, the processing circuitry operable to:
receive a quasi-colocation (QCL) status between a reference signal and a control signal;
receive the reference signal;
estimate one or more signal parameters based on the received reference signal;
when the QCL status indicates the reference signal and the control signal are quasi-colocated, receive the control signal using the estimated signal parameters to optimize reception of the control signal in terms of at least one of energy efficiency and performance;
when the QCL status indicates the reference signal and the control signal are not quasi-colocated, receive the control signal using estimated signal parameters of a different reference signal; and
wherein the reference signal comprises a synchronization signal block (SSB) and the different reference signal comprises a tracking reference signal (TRS).
3. The wireless device of claim 2 , wherein receiving the QCL status comprises receiving radio resource control (RRC) configuration.
4. The wireless device of claim 2 , wherein receiving the QCL status comprises receiving broadcast transmission.
5. The method of claim 2 , wherein the processing circuitry is operable to receive the QCL status by receiving an indication of which attributes of the reference signal are QCL with the control signal.