Multiplexing of channel state information reference signals (CSI-RS)

1. An apparatus of a next generation node B (gNB) configured to transmit in multiple bandwidth parts (BWPs), the apparatus comprising:

one or more processors configured to:

determine a channel state information reference signal (CSI-RS) symbol location in a first bandwidth part (BWP);

determine a CSI-RS symbol location in a second BWP;

encode the CSI-RS in one or more of the first BWP or the second BWP for transmission to a user equipment (UE); and

decode a signal from the UE to determine that one of:

the UE supports a first subcarrier spacing (SCS) for the first BWP and a second SCS for the second BWP at a given time; or

the UE supports the first SCS for both the first BWP and the second BWP at a given time; and

a memory interface configured to send to a memory the CSI-RS symbol location.

2. The apparatus of claim 1 , further comprising a transceiver configured to:

transmit the CSI-RS in one or more of the first BWP or the second BWP to the user equipment (UE).

3. The apparatus of claim 1 , wherein the signal includes a higher layer signal corresponding to

a UE capability message.

4. The apparatus of claim 1 , wherein the one or more processors are further configured to:

determine an SCS for each BWP in a plurality of BWPs;

encode a CSI-RS for beam management (BM) for transmission in a BWP in the plurality of BWPs with a largest SCS at one or more symbols in the BWP; and

puncture corresponding symbols in a physical downlink shared channel (PDSCH) of remaining BWPs in the plurality of BWPs; or

rate match corresponding symbols in the PDSCH of remaining BWPs in the plurality of BWPs.

5. The apparatus of claim 1 , wherein the one or more processors are further configured to:

encode a CSI-RS for beam management (BM) for transmission in a BWP in the plurality of BWPs at one or more symbols in the BWP; and

encode corresponding symbols in a physical downlink shared channel (PDSCH) of remaining BWPs in the plurality of BWPs with data.

6. The apparatus of claim 1 , wherein the one or more processors are further configured to:

determine the CSI-RS symbol location in the first BWP is located prior to a demodulation reference symbol (DM-RS);

encode the CSI-RS in the first BWP at the determined CSI-RS symbol location; and

encode a physical downlink control channel (PDCCH) at a symbol location in the second BWP that corresponds to the determined CSI-RS symbol location.

7. The apparatus of claim 1 , wherein the one or more processors are further configured to:

puncture the CSI-RS; or

puncture the symbol location in the second BWP; or

allocate one or more symbols at an end of a physical downlink shared channel (PDSCH) for transmission of the CSI-RS.

8. The apparatus of claim 1 , wherein the one or more processors are further configured to:

encode the CSI-RS for transmission in the first BWP with a first subcarrier spacing (SCS); and

encode the CSI-RS for transmission in the second BWP with a second SCS; and

drop the CSI-RS in one of the first BWP or the second BWP based on:

a periodic transmission behavior of the first BWP and the second BWP;

an aperiodic transmission behavior of the first BWP and the second BWP;

a BWP index of the first BWP and the second BWP;

a SCS of the first BWP and the second BWP; or

a periodicity of the first BWP and the second BWP in a periodic transmission of the CSI-RS in the first BWP and the second BWP.

9. The apparatus of claim 1 , wherein the one or more processors are further configured to:

encode a synchronization signal block (SSB) and one or more additional downlink (DL) signals in a same symbol, wherein the one or more additional DL signals comprise the CSI-RS, a physical downlink shared channel (PDSCH), or a physical downlink control channel (PDCCH); and

configure the UE to skip a measurement of the SSB when the additional DL signal is the PDSCH; or

configure the UE to skip the measurement of the SSB when the additional DL signal is the PDCCH; or

configure the UE to skip the measurement of the SSB or the CSI-RS when the additional DL signal is the CSI-RS.

10. An apparatus of a user equipment (UE) configured to transmit in multiple bandwidth parts (BWPs) at a given time, the apparatus comprising:

one or more processors configured to:

determine a sounding reference signal (SRS) symbol location in a first bandwidth part (BWP);

determine a SRS symbol location in a second BWP;

encode the SRS in one or more of the first BWP or the second BWP for transmission to a gNB; and

encode for transmission to the gNB a signal to indicate that one of:

the UE supports a first subcarrier spacing (SCS) for the first BWP and a second SCS for the second BWP at a given time; or

the UE supports the first SCS for both the first BWP and the second BWP at a given time; and

a memory interface configured to send to a memory the SRS symbol location.

11. The apparatus of claim 10 , further comprising a transceiver configured to:

transmit the SRS in one or more of the first BWP or the second BWP to a gNB.

12. The apparatus of claim 10 , wherein the UE includes an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, a non-volatile memory port, or combinations thereof.

13. The apparatus of claim 10 , wherein the one or more processors are further configured to:

transmit a physical uplink control channel (PUCCH), the SRS, or a physical random access channel (PRACH) in multiple BWPs in a same symbol based on:

a dropping rule based on a BWP index; or

a dropping rule based on a type of each channel; or

a dropping rule based on a content of each channel.

14. The apparatus of claim 10 , wherein the one or more processors are further configured to:

drop the SRS in one of the first BWP or the second BWP based on:

a numerology index of the first BWP and the second BWP;

a BWP index of the first BWP and the second BWP;

a higher layer signal via new radio (NR) minimum system information (MSI);

a higher layer signal via NR remaining minimum system information (RMSI);

a higher layer signal via NR system information block (SIB); or

a higher layer signal via radio resource control (RRC) signaling.

15. The apparatus of claim 10 , wherein the one or more processors are further configured to:

determine a collision of a first SRS symbol in a first BWP with a second SRS in a second BWP; or

time domain hop the first SRS symbol in the first BWP.

16. At least one non-transitory machine readable storage medium storing instructions thereon, the instructions, when executed by one or more processors at a next generation node B (gNB), to cause the one or more processors to perform operations including:

determining a channel state information reference signal (CSI-RS) symbol location in a first bandwidth part (BWP);

determining a CSI-RS symbol location in a second BWP;

encoding the CSI-RS in one or more of the first BWP or the second BWP for transmission to a user equipment (UE); and

decoding a signal from the UE to determine that one of:

the UE supports a first subcarrier spacing (SCS) for the first BWP and a second SCS for the second BWP at a given time; or

the UE supports the first SCS for both the first BWP and the second BWP at a given time.