Receiving time overlapping downlink reference signals and channels

1 . A method performed by a wireless device for determining Transmission Configuration Indication, TCI, states for receiving one or more Aperiodic, AP, Channel State Information Reference Signals, CSI-RSs, the method comprising:

receiving downlink control information, DCI, in a physical downlink control channel, PDCCH, triggering of one or more AP CSI-RSs in one or more symbols with a first time offset between a last symbol of the PDCCH and the first symbol of the one or more symbols containing the AP CSI-RSs, where the time offset is smaller than a first threshold;

determining a Quasi Co-Location, QCL, assumption for receiving the one or more AP CSI-RSs based on a plurality of TCI states associated with one or more downlink transmissions scheduled in the same one or more symbols as the one or more AP CSI-RSs, wherein the plurality of TCI states are indicated in a DCI scheduling the one or more downlink transmissions, wherein, when the time offset is smaller than the first threshold, the determined QCL assumption is a QCL assumption given by a TCI state of the plurality of TCI states indicated by the DCI scheduling the one or more downlink transmissions in a symbol of the same one or more symbols that are used for receiving the one or more AP CSI-RSs; and

receiving the one or more AP CSI-RSs in the one or more symbols using the determined QCL assumption;

wherein the determined QCL assumption is a QCL assumption given by a 1 st indicated TCI state in a DCI for a Physical Downlink Shared Channel, PDSCH, in a symbol for receiving the one or more AP CSI-RSs in the same one or more symbols when the one or more downlink transmissions are one or more sets of layers of the PDSCH where each set of layers is associated with one of the plurality of TCI states; and

wherein the first threshold comprises a beamSwitchTiming value reported by the wireless device.

2 . The method of claim 1 wherein the one or more downlink transmissions comprise one or more Physical Downlink Shared Channel, PDSCH, transmissions.

3 . The method of claim 2 wherein the one or more PDSCH transmissions are scheduled by the DCI carried in the PDCCH.

4 . The method of claim 3 , wherein a second time offset between a first symbol of the PDCCH carrying the DCI that schedules the one or more PDSCH and a first symbol of the PDSCH is greater than or equal to a second threshold.

5 . The method of claim 1 , wherein each of the one or more downlink transmissions is associated with one of the plurality of TCI states.

6 . The method of claim 1 , wherein the one or more downlink transmissions are one or more PDSCH repetitions in time domain or in frequency domain.

7 . The method of claim 6 , wherein the one or more downlink transmissions are according to one of the schemes “TDMSchemeA”, “FDMSchemeB” or “FDMSchemeA”.

8 . The method of claim 1 , wherein the one or more downlink transmissions are one or more sets of layers of a PDSCH, wherein each set of layers is associated with one of the plurality of TCI states.

9 . The method of claim 1 , wherein the plurality of TCI states comprises a first and a second TCI states.

10 . The method of claim 1 wherein the one or more symbols are one or more Orthogonal Frequency Division Multiplexing, OFDM, symbols.

11 . The method of claim 4 wherein the second threshold is a timeDurationForQCL value reported by the wireless device.

12 . The method of claim 1 , wherein the determined QCL assumption is a QCL assumption given by a TCI state of one or more downlink PDSCH transmissions in a symbol for receiving the one or more AP CSI-RSs in the same one or more symbols, when the one or more downlink PDSCH transmissions are one or more PDSCH repetitions in time domain and each of the one or more PDSCH transmissions is associated with one of the plurality of TCI states.

13 . The method of claim 1 , wherein the determined QCL assumption is a QCL assumption given by the 1 st TCI state of the plurality of TCI states for receiving the one or more AP CSI-RSs.

14 . The method of claim 4 wherein a second offset is smaller than a threshold timeDurationForQCL.

15 . The method of claim 1 , where the plurality of TCI states comprises a first and a second default TCI states, wherein the first and second default TCI states are associated with a codepoint of a TCI field in DCI with a lowest codepoint value.

16 . The method of claim 15 , wherein:

a single triggered AP CSI-RS is in the same symbols as a downlink PDSCH transmission; and

wherein the determined QCL assumption is a QCL assumption given by a 1 st default TCI state of the PDSCH for receiving the AP CSI-RS.

17 . The method of claim 14 , wherein:

two triggered AP CSI-RSs are in the same symbols as a PDSCH associated with a first and a second TCI states; and

the determined QCL assumption is a QCL assumption given by the 1 st and 2 nd default TCI states of the PDSCH for receiving the 1 st and 2 nd AP CSI-RS, respectively.

18 . A method performed by a base station for indicating Transmission Configuration Indication, TCI, states for receiving one or more Aperiodic, AP, Channel State Information Reference Signals, CSI-RSs, the method comprising:

signaling, to a wireless device, in Downlink Control Information, DCI, in a Physical Control Channel, PDCCH, about one or more AP CSI-RSs to be transmitted to the wireless device in one or more symbols, wherein one or more downlink transmissions associated with two TCI states are also to be transmitted in the same symbols, wherein a first time offset between the PDCCH and the one or more AP CSI-RSs is smaller than or equal to a first threshold;

determining a Quasi Co-Location, QCL, assumption for transmitting the one or more AP CSI-RSs based on TCI states of the one or more downlink transmissions, wherein the plurality of TCI states are indicated in a DCI scheduling the one or more downlink transmissions, wherein, when the time offset is smaller than the first threshold, the determined QCL assumption is a QCL assumption given by a TCI state of one or more downlink transmissions in a symbol for receiving the one or more AP CSI-RSs in the same one or more symbols; and

transmitting, to the wireless device, the one or more AP CSI-RSs in the one or more symbols according to the QCL assumption;

wherein the determined QCL assumption is a QCL assumption given by a 1 st indicated TCI state for a Physical Downlink Shared Channel, PDSCH, in a symbol for receiving the one or more AP CSI-RSs in the same one or more symbols when the one or more downlink transmissions are one or more sets of layers of the PDSCH where each set of layers is associated with one of the plurality of TCI states; and

wherein the first threshold comprises a beamSwitchTiming value reported by the wireless device.

19 . The method of claim 18 , wherein the one or more downlink transmissions comprise PDSCH transmission(s).

20 . A wireless device for activating Transmission Configuration Indicator, TCI, states comprising:

one or more transmitters;

one or more receivers; and

processing circuitry associated with the one or more transmitters and the one or more receivers, the processing circuitry configured to cause the wireless device to:

receive downlink control information, DCI, in a physical downlink control channel, PDCCH, triggering of one or more AP CSI-RSs in one or more symbols with a scheduling offset between a last symbol of a PDCCH carrying the triggering DCI and the first symbol of the one or more symbols containing the AP CSI-RS resources, where the scheduling offset is smaller than a wireless device reported threshold; and

determine a Quasi Co-Location, QCL, assumption for receiving the one or more AP CSI-RSs based on TCI states, wherein the plurality of TCI states are indicated in a DCI scheduling the one or more downlink transmissions, wherein, when the time offset is smaller than the first threshold, the determined QCL assumption is a QCL assumption given by a TCI state of the plurality of TCI states indicated by the DCI scheduling the one or more downlink transmissions in a symbol of the same one or more symbols that are used for receiving the one or more AP CSI-RSs; and

receive the one or more AP CSI-RSs in the one or more symbols using the determined QCL assumption;

wherein the determined QCL assumption is a QCL assumption given by a 1 st indicated TCI state in a DCI for a Physical Downlink Shared Channel, PDSCH, in a symbol for receiving the one or more AP CSI-RSs in the same one or more symbols when the one or more downlink transmissions are one or more sets of layers of the PDSCH where each set of layers is associated with one of the plurality of TCI states; and

wherein the first threshold comprises a beamSwitchTiming value reported by the wireless device.

21 . A base station for activating Transmission Configuration Indicator, TCI, states, comprising:

one or more transmitters;

one or more receivers; and

processing circuitry associated with the one or more transmitters and the one or more receivers, the processing circuitry configured to cause the base station to:

signal, to a wireless device, in Downlink Control Information, DCI, in a Physical Control Channel, PDCCH, about one or more AP CSI-RSs to be transmitted to the wireless device in one or more symbols, wherein one or more downlink transmissions associated with two TCI states are also to be transmitted in the same symbols, wherein a first time offset between the PDCCH and the one or more AP CSI-RSs is smaller than or equal to a first threshold;

determine a Quasi Co-Location, QCL, assumption for transmitting the one or more AP CSI-RSs based on the TCI states of the one or more downlink transmissions, wherein the plurality of TCI states are indicated in a DCI scheduling the one or more downlink transmissions, wherein, when the time offset is smaller than the first threshold, the determined QCL assumption is a QCL assumption given by a TCI state of one or more downlink transmissions in a symbol for receiving the one or more AP CSI-RSs in the same one or more symbols; and

transmit, to the wireless device, the one or more AP CSI-RSs in the one or more symbols according to the QCL assumption;

wherein the determined QCL assumption is a QCL assumption given by a 1 st indicated TCI state in a DCI for a Physical Downlink Shared Channel, PDSCH, in a symbol for receiving the one or more AP CSI-RSs in the same one or more symbols when the one or more downlink transmissions are one or more sets of layers of the PDSCH where each set of layers is associated with one of the plurality of TCI states; and

wherein the first threshold comprises a beamSwitchTiming value reported by the wireless device.