Techniques for device-assisted waveform selection in wireless communications
Aspects described herein relate to switching waveforms in a waveform switching gap. In an aspect, using a transceiver, a first signal of a first waveform can be communicated. Assistance information related to switching the transceiver to use a second waveform can be communicated as well, and based at least in part on the assistance information, the transceiver can be switched to use a second waveform. Using the transceiver, a second signal of a second waveform can be communicated.
1. An apparatus for wireless communication, comprising:
a transceiver;
a memory configured to store instructions; and
one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to:
communicate, using the transceiver, a first signal of a first waveform in a first time period, wherein the first waveform is generated based on a transform of first data modulated symbols into the first waveform, or the first waveform is processed to recover the first data modulated symbols from the first waveform;
transmit, to a base station, assistance information related to switching the transceiver to use a second waveform, wherein the assistance information includes an explicit indication of the second waveform, and wherein the second waveform is generated based on a transform of second data modulated symbols into the second waveform, or the second waveform is processed to recover the second data modulated symbols from the second waveform, wherein the assistance information includes the explicit indication of multiple waveforms, including the second waveform, to which to switch in a specific recommended order;
receive, from the base station and based at least in part on transmitting the assistance information, an indication to switch to the second waveform;
switch, based at least in part on receiving the indication, the transceiver to use the second waveform; and
communicate, using the transceiver, a second signal of the second waveform in a second time period.
2. The apparatus of claim 1 , wherein the assistance information relates to switching to use the second waveform for one or more of uplink communications or downlink communications with the base station.
3. The apparatus of claim 1 , wherein the one or more processors are further configured to perform one or more measurements of one or more signals received from the base station, and wherein the one or more processors are configured to transmit the assistance information based at least in part on the one or more measurements.
4. The apparatus of claim 3 , wherein the one or more processors are further configured to receive, from the base station, a configuration indicating at least one metric or threshold of a signal parameter for transmitting the assistance information, wherein the one or more processors are configured to transmit the assistance information based at least in part on comparing the one or more measurements to the at least one metric or threshold.
5. The apparatus of claim 1 , wherein the assistance information further identifies one or more other waveforms for subsequent switching.
6. The apparatus of claim 1 , wherein the one or more processors are further configured to measure one or more signals received from the base station, and wherein the assistance information includes one or more parameters of measuring the one or more signals.
7. The apparatus of claim 6 , wherein the one or more parameters include a channel state information value, including a multiple-input multiple-output (MIMO) rank or a power headroom, an available processing power, or an adjacent channel leakage ratio.
8. The apparatus of claim 1 , wherein the one or more processors are configured to transmit the assistance information in a periodic report.
9. The apparatus of claim 1 , wherein the one or more processors are configured to transmit the assistance information in an aperiodic report based on a trigger received from the base station.
10. The apparatus of claim 9 , wherein the one or more processors are further configured to receive the trigger from the base station in downlink control information (DCI) or a media access control (MAC)-control element (CE).
11. The apparatus of claim 1 , wherein the one or more processors are configured to transmit the assistance information over configured resources based on detecting occurrence of an event.
12. The apparatus of claim 1 , wherein the one or more processors are configured to transmit the assistance information on an uplink control channel or uplink shared channel.
13. The apparatus of claim 12 , wherein the one or more processors are configured to transmit the assistance information as multiplexed with a channel state information report over the uplink control channel or uplink shared channel.
14. The apparatus of claim 1 , wherein the one or more processors are configured to transmit the assistance information by using specific uplink control channel resources or a specific physical random access channel sequence.
15. The apparatus of claim 1 , wherein the one or more processors are configured to transmit the assistance information based on a backoff timer, wherein the one or more processors transmit the assistance information if the backoff timer is expired or do not transmit the assistance information if the backoff timer is not expired.
16. The apparatus of claim 1 , wherein the first waveform is one of an orthogonal frequency division multiplexing (OFDM) waveform, a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) waveform, or a single carrier-quadrature amplitude modulation (SC-QAM) waveform, and wherein the second waveform is a different one of the OFDM waveform, the DFT-s-OFDM waveform, or the SC-QAM waveform.
17. An apparatus for wireless communication, comprising:
a transceiver;
a memory configured to store instructions; and
one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to:
communicate, using the transceiver, a first signal of a first waveform in a first time period, wherein the first waveform is generated based on a transform of first data modulated symbols into the first waveform, or the first waveform is processed to recover the first data modulated symbols from the first waveform;
receive, from a user equipment (UE), assistance information related to switching the transceiver to use a second waveform, wherein the assistance information includes an explicit indication of the second waveform, and wherein the second waveform is generated based on a transform of second data modulated symbols into the second waveform, or the second waveform is processed to recover the second data modulated symbols from the second waveform, wherein the assistance information includes the explicit indication of multiple waveforms, including the second waveform, to which to switch in a specific recommended order;
transmit, to the UE and based at least in part on the assistance information, an indication to switch to the second waveform;
switch, based at least in part on transmitting the indication, the transceiver to use the second waveform; and
communicate, using the transceiver, a second signal of the second waveform in a second time period.
18. The apparatus of claim 17 , wherein the assistance information relates to switching to use the second waveform for one or more of uplink communications or downlink communications with the UE.
19. The apparatus of claim 17 , wherein the one or more processors are configured to receive the assistance information in a periodic report, an aperiodic report, or an event-based report.
20. The apparatus of claim 17 , wherein the one or more processors are configured to receive the assistance information on an uplink control channel or uplink shared channel.
21. A method for wireless communication, comprising:
communicating, using a transceiver, a first signal of a first waveform in a first time period, wherein the first waveform is generated based on a transform of first data modulated symbols into the first waveform, or the first waveform is processed to recover the first data modulated symbols from the first waveform;
transmitting, to a base station, assistance information related to switching the transceiver to use a second waveform, wherein the assistance information includes an explicit indication of the second waveform, and wherein the second waveform is generated based on a transform of second data modulated symbols into the second waveform, or the second waveform is processed to recover the second data modulated symbols from the second waveform, wherein the assistance information includes the explicit indication of multiple waveforms, including the second waveform, to which to switch in a specific recommended order;
receiving, from the base station, an indication to switch to the second waveform;
switching, based at least in part on receiving the indication, the transceiver to use the second waveform; and
communicating, using the transceiver, a second signal of the second waveform in a second time period.
22. The method of claim 21 , wherein the assistance information relates to switching to use the second waveform for one or more of uplink communications or downlink communications with the base station.
23. A method for wireless communication, comprising:
communicating, using a transceiver, a first signal of a first waveform in a first time period, wherein the first waveform is generated based on a transform of first data modulated symbols into the first waveform, or the first waveform is processed to recover the first data modulated symbols from the first waveform;
receiving, from a user equipment (UE), assistance information related to switching the transceiver to use a second waveform, wherein the assistance information includes an explicit indication of the second waveform, and wherein the second waveform is generated based on a transform of second data modulated symbols into the second waveform, or the second waveform is processed to recover the second data modulated symbols from the second waveform, wherein the assistance information includes the explicit indication of multiple waveforms, including the second waveform, to which to switch in a specific recommended order;
transmitting, to the UE and based at least in part on the assistance information, an indication to switch to the second waveform;
switching, based at least in part on transmitting the indication, the transceiver to use the second waveform; and
communicating, using the transceiver, a second signal of the second waveform in a second time period.
24. The method of claim 21 , further comprising performing one or more measurements of one or more signals received from the base station, and wherein transmitting the assistance information is based at least in part on the one or more measurements.
25. The method of claim 24 , further comprising receiving, from the base station, a configuration indicating at least one metric or threshold of a signal parameter for transmitting the assistance information, wherein transmitting the assistance information is based at least in part on comparing the one or more measurements to the at least one metric or threshold.
26. The method of claim 21 , wherein the assistance information further identifies one or more other waveforms for subsequent switching.
27. The method of claim 21 , further comprising measuring one or more signals received from the base station, and wherein the assistance information includes one or more parameters of measuring the one or more signals.
28. The method of claim 27 , wherein the one or more parameters include a channel state information value, including a multiple-input multiple-output (MIMO) rank or a power headroom, an available processing power, or an adjacent channel leakage ratio.
29. The method of claim 21 , wherein transmitting the assistance information includes transmitting the assistance information in a periodic report.
30. The method of claim 23 , wherein the assistance information relates to switching to use the second waveform for one or more of uplink communications or downlink communications with the UE.