Techniques and apparatuses for waveform signaling for downlink communications
First Claim
1. A method of wireless communication, comprising:
- receiving, by a user equipment (UE), a waveform indication in a first downlink channel that uses a first waveform of a plurality of waveforms, the plurality of waveforms including a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform and a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform;
determining, by the UE, a second waveform, of the plurality of waveforms, to be used for one or more downlink communications in a second downlink channel based at least in part on the waveform indication received in the first downlink channel; and
processing, by the UE, the one or more downlink communications received in the second downlink channel using the second waveform,wherein at least one of a reference signal or a data tone is received using pre-DFT-spread multiplexing or time division multiplexing when the second waveform is the DFT-s-OFDM waveform, or wherein at least one of a reference signal or a data tone is received using frequency division multiplexing (FDM) or time division multiplexing when the second waveform is the CP-OFDM waveform.
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Accused Products
Abstract
When a base station is capable of using multiple different types of waveforms for a downlink communication to a UE, the UE may waste processing resources attempting to receive and/or process the downlink communication. For example, the UE may cycle through various possible types of waveforms in an attempt to process the downlink communication. Techniques described herein use waveform signaling for downlink communications to notify the UE of a type of waveform being used for a downlink communication, thereby conserving UE resources (e.g., processing resources, memory resources, RF resources, and/or the like) that would otherwise be wasted attempting to process the downlink communication using multiple types of waveforms.
10 Citations
30 Claims
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1. A method of wireless communication, comprising:
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receiving, by a user equipment (UE), a waveform indication in a first downlink channel that uses a first waveform of a plurality of waveforms, the plurality of waveforms including a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform and a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform; determining, by the UE, a second waveform, of the plurality of waveforms, to be used for one or more downlink communications in a second downlink channel based at least in part on the waveform indication received in the first downlink channel; and processing, by the UE, the one or more downlink communications received in the second downlink channel using the second waveform, wherein at least one of a reference signal or a data tone is received using pre-DFT-spread multiplexing or time division multiplexing when the second waveform is the DFT-s-OFDM waveform, or wherein at least one of a reference signal or a data tone is received using frequency division multiplexing (FDM) or time division multiplexing when the second waveform is the CP-OFDM waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A user equipment (UE) for wireless communication, comprising:
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memory; and one or more processors coupled to the memory, the memory and the one or more processors configured to; receive a waveform indication in a first downlink channel that uses a first waveform of a plurality of waveforms, the plurality of waveforms including a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform and a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform; determine a second waveform, of the plurality of waveforms, to be used for one or more downlink communications in a second downlink channel based at least in part on the waveform indication received in the first downlink channel; and process the one or more downlink communications received in the second downlink channel using the second waveform, wherein at least one of a reference signal or a data tone is received using pre-DFT-spread multiplexing or time division multiplexing when the second waveform is the DFT-s-OFDM waveform, or wherein at least one of a reference signal or a data tone is received using frequency division multiplexing (FDM) or time division multiplexing when the second waveform is the CP-OFDM waveform. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable to:
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receive, by a user equipment (UE), a waveform indication in a first downlink channel that uses a first waveform of a plurality of waveforms, the plurality of waveforms including a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform and a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform; determine, by the UE, a second waveform, of the plurality of waveforms, to be used for one or more downlink communications in a second downlink channel based at least in part on the waveform indication received in the first downlink channel; and process, by the UE, the one or more downlink communications received in the second downlink channel using the second waveform, wherein at least one of a reference signal or a data tone is received using pre-DFT-spread multiplexing or time division multiplexing when the second waveform is the DFT-s-OFDM waveform, or wherein at least one of a reference signal or a data tone is received using frequency division multiplexing (FDM) or time division multiplexing when the second waveform is the CP-OFDM waveform. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A user equipment (UE) for wireless communication, comprising:
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means for receiving, by a user equipment (UE), a waveform indication in a first downlink channel that uses a first waveform of a plurality of waveforms, the plurality of waveforms including a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform and a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform; means for determining, by the UE, a second waveform, of the plurality of waveforms, to be used for one or more downlink communications in a second downlink channel based at least in part on the waveform indication received in the first downlink channel; and means for processing, by the UE, the one or more downlink communications received in the second downlink channel using the second waveform, wherein at least one of a reference signal or a data tone is received using pre-DFT-spread multiplexing or time division multiplexing when the second waveform is the DFT-s-OFDM waveform, or wherein at least one of a reference signal or a data tone is received using frequency division multiplexing (FDM) or time division multiplexing when the second waveform is the CP-OFDM waveform.
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Specification