PUSCH Waveform Switching to Reduce Uplink Control Ambiguity
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Solution Overview
Problem
The existing mobile communication systems face challenges in accommodating explosive data traffic, high transmission rates, large numbers of connected devices, low latency, and high energy efficiency, necessitating improved methods for uplink transmission and reception.
Innovation Solution
A method and apparatus for dynamically switching or changing waveforms for uplink transmission, enabling or disabling transform precoding based on configuration information and downlink control signals, to enhance uplink transmission performance and reduce ambiguity between user equipment and base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic waveform switching is implemented for uplink transmission, then uplink transmission performance is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic waveform switching by enabling the UE to switch between different waveforms (CP-OFDM and DFT-S-OFDM) based on real-time channel conditions and base station indications. This dynamic adaptation allows the system to optimize uplink transmission performance by selecting the most appropriate waveform for current transmission conditions, directly resolving the contradiction between maintaining fixed waveform simplicity and achieving dynamic performance optimization.
Solution Approach 2:
The patent changes the waveform parameter dynamically through base station indications in DCI messages. The base station configures multiple bandwidth parts with different waveform capabilities and dynamically selects which waveform to use for each uplink transmission based on channel conditions, traffic type, and interference levels. This parameter change approach enables performance improvement without requiring complex UE-side decision-making logic.
2Adaptability or versatility
If transform precoding is dynamically enabled or disabled, then adaptability of uplink transmission is improved, but control information ambiguity increases
Solution Approach 1:
The patent applies preliminary action by having the base station pre-configure multiple bandwidth parts with different waveform capabilities before uplink transmission. The base station also pre-establishes the rules for waveform switching through RRC configuration. When dynamic waveform switching is needed, the base station simply indicates which pre-configured bandwidth part to use, eliminating the need for ambiguous real-time negotiations about transform precoding status and preventing control information ambiguity.
Solution Approach 2:
The patent introduces bandwidth part configuration as an intermediary layer between the UE and base station for waveform control. Instead of directly controlling transform precoding status which causes ambiguity, the system uses bandwidth part selection as an intermediary mechanism. The bandwidth part configuration carries waveform capability information, and selecting a specific bandwidth part implicitly determines the waveform to be used, thereby eliminating direct control information ambiguity while maintaining adaptability.
Data Source
AI summary
Disclosed are a method and a device for uplink transmission and reception in a wireless communication system. A method according to one embodiment of the present disclosure may comprise the steps of: receiving PUSCH-related configuration information about a specific BWP from a base station, wherein the configuration information includes first information about whether dynamic waveform switching for the PUSCH is supported; receiving, from the base station, DCI scheduling the PUSCH; and transmitting the PUSCH to the base station.