Quasi co-location assumption during bandwidth part switching

A method for wireless communication by a base station, comprising:

• transmitting, to a user equipment (UE), an indicator indicating to derive a quasi co-location (QCL) assumption for a demodulation reference signal (DMRS) for a first bandwidth part from a reference signal of a second bandwidth part;
• transmitting a grant in the second bandwidth part instructing the UE to switch from the second bandwidth part to the first bandwidth part;
• generating a transmission in accordance with the QCL assumption;
• and
• transmitting the transmission in the first bandwidth part during a transition time window occurring after the UE is instructed to switch from the second bandwidth part to the first bandwidth part.

An apparatus for wireless communication by a user equipment (UE), comprising:

• means for receiving an indicator indicating to derive a quasi co-location (QCL) assumption for a demodulation reference signal (DMRS) for a first bandwidth part from a reference signal of a second bandwidth part;
• means for receiving a grant in the second bandwidth part instructing the UE to switch from the second bandwidth part to the first bandwidth part;
• and
• means for demodulating, based at least in part on the QCL assumption, a transmission in the first bandwidth part received within a transition time window occurring after the UE receives the grant.

An apparatus for wireless communication by a base station, comprising:

• means for transmitting, to a user equipment (UE), an indicator indicating to derive a quasi co-location (QCL) assumption for a demodulation reference signal (DMRS) for a first bandwidth part from a reference signal of a second bandwidth part;
• means for transmitting a grant in the second bandwidth part instructing the UE to switch from the second bandwidth part to the first bandwidth part;
• means for generating a transmission in accordance with the QCL assumption;
• and
• means for transmitting the transmission in the first bandwidth part during a transition time window occurring after the UE is instructed to switch from the second bandwidth part to the first bandwidth part.

An apparatus for wireless communication by a user equipment (UE), comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive an indicator indicating to derive a quasi co-location (QCL) assumption for a demodulation reference signal (DMRS) for a first bandwidth part from a reference signal of a second bandwidth part;
• receive a grant in the second bandwidth part instructing the UE to switch from the second bandwidth part to the first bandwidth part;
• and
• demodulate, based at least in part on the QCL assumption, a transmission in the first bandwidth part received within a transition time window occurring after the UE receives the grant.

An apparatus for wireless communication by a base station, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit, to a user equipment (UE), an indicator indicating to derive a quasi co-location (QCL) assumption for a demodulation reference signal (DMRS) for a first bandwidth part from a reference signal of a second bandwidth part;
• transmit a grant in the second bandwidth part instructing the UE to switch from the second bandwidth part to the first bandwidth part;
• generate a transmission in accordance with the QCL assumption;
• and
• transmit the transmission in the first bandwidth part during a transition time window occurring after the UE is instructed to switch from the second bandwidth part to the first bandwidth part.

A non-transitory computer-readable medium storing code for wireless communication by a user equipment (UE), the code comprising instructions executable by a processor to:

• receive an indicator indicating to derive a quasi co-location (QCL) assumption for a demodulation reference signal (DMRS) for a first bandwidth part from a reference signal of a second bandwidth part;
• receive a grant in the second bandwidth part instructing the UE to switch from the second bandwidth part to the first bandwidth part;
• and
• demodulate, based at least in part on the QCL assumption, a transmission in the first bandwidth part received within a transition time window occurring after the UE receives the grant.

A non-transitory computer-readable medium storing code for wireless communication by a base station, the code comprising instructions executable by a processor to:

• transmit, to a user equipment (UE), an indicator indicating to derive a quasi co-location (QCL) assumption for a demodulation reference signal (DMRS) for a first bandwidth part from a reference signal of a second bandwidth part;
• transmit a grant in the second bandwidth part instructing the UE to switch from the second bandwidth part to the first bandwidth part;
• generate a transmission in accordance with the QCL assumption;
• and
• transmit the transmission in the first bandwidth part during a transition time window occurring after the UE is instructed to switch from the second bandwidth part to the first bandwidth part.