Mixed PUSCH Waveform Repetition for Uplink Resource Utilization
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Solution Overview
Problem
Existing wireless communication technologies, such as LTE and NR, face challenges in optimizing physical uplink shared channel (PUSCH) transmissions due to limitations in using a single waveform, which can result in suboptimal resource utilization and reduced transmission success rates.
Innovation Solution
Implementing a method and apparatus that configure and utilize a first and a second waveform that are different from each other for PUSCH repetitions, allowing for more efficient use of time and frequency resources by alternating waveforms based on specific configurations and associations with antenna panels or beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single waveform is used for PUSCH transmissions, then the system complexity is reduced and implementation is simpler, but resource utilization becomes suboptimal and transmission success rates decrease
Solution Approach 1:
The patent implements dynamic waveform selection where the UE alternates between first waveform (e.g., DFT-s-OFDM) and second waveform (e.g., CP-OFDM) across different PUSCH repetitions based on configuration received from the base station. This dynamic switching optimizes transmission reliability by adapting waveform type to channel conditions and repetition index, resolving the contradiction between transmission success rate and system complexity.
Solution Approach 2:
The patent changes the waveform parameter across different PUSCH repetitions by configuring the UE with multiple waveform types and instructing it to alternate between them. This parameter variation improves transmission success rate by selecting appropriate waveforms for different repetition scenarios while maintaining manageable complexity through standardized configuration mechanisms.
2Productivity
If a single waveform is used for all PUSCH repetitions, then the implementation is simpler, but resource utilization efficiency is reduced
Solution Approach 1:
The patent implements periodic waveform alternation where the UE systematically switches between first and second waveforms across PUSCH repetitions in a configured pattern (e.g., odd repetitions use first waveform, even repetitions use second waveform). This periodic action maximizes resource utilization efficiency by diversifying waveform usage while maintaining simple, predictable management through base station configuration.
3Reliability
If mixed waveforms are configured and used for PUSCH repetitions, then transmission quality and resource utilization improve, but the device complexity and configuration overhead increase
Solution Approach 1:
The patent makes the PUSCH transmission system multi-functional by configuring the UE to support and switch between multiple waveform types (e.g., DFT-s-OFDM and CP-OFDM). This universality improves transmission reliability by allowing the system to adapt to different channel conditions and repetition scenarios, while the standardized configuration framework keeps the added complexity manageable.
Solution Approach 2:
The base station provides configuration feedback to the UE indicating which waveforms are supported and how they should be alternated across PUSCH repetitions. This feedback mechanism coordinates the waveform switching behavior, improving transmission reliability through informed waveform selection while reducing the complexity burden on the UE by receiving clear configuration instructions from the network.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a physical uplink shared channel (PUSCH) configuration that configures a first waveform and a second waveform that is different than the first waveform; and transmit, based at least in part on the PUSCH configuration, a first PUSCH repetition using one of the first waveform or the second waveform, and a second PUSCH repetition using the other one of the first waveform or the second waveform. Numerous other aspects are provided.