Dynamic Uplink Waveform Switching for 5G Performance
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Solution Overview
Problem
Conventional communication systems statically select uplink waveforms for user equipment (UE) at the start of a call session, failing to adapt to changing conditions such as location, signal strength, and UE state, which can lead to suboptimal performance.
Innovation Solution
Implementing dynamic waveform switching between DFT-s-OFDM and CP-OFDM waveforms based on real-time data from the UE, including location, signal, and UE state data, allowing the base station to select the most appropriate waveform for uplink transmissions to maximize performance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single waveform is selected at the start of a call session, then device complexity is reduced and ease of operation is improved, but adaptability to changing conditions deteriorates and performance becomes suboptimal
Solution Approach 1:
The patent implements dynamic waveform switching where the base station selects between DFT-s-OFDM and CP-OFDM waveforms based on real-time UE conditions such as location, signal strength, and UE state. This dynamic selection allows the system to adapt to changing conditions while maintaining manageable complexity through automated base station control rather than UE-side implementation.
2Use of energy by moving object
If DFT-s-OFDM waveform is used, then power efficiency is improved and cell edge coverage is extended, but throughput performance deteriorates
Solution Approach 1:
The patent changes the waveform parameter dynamically based on operating conditions. When power efficiency is prioritized (e.g., UE at cell edge or in power-saving mode), DFT-s-OFDM is selected. When throughput is prioritized (e.g., good signal conditions), CP-OFDM is selected. This parameter switching resolves the contradiction by allowing both waveforms to be used in appropriate contexts.
3Productivity
If CP-OFDM waveform is used, then throughput performance is maximized, but power consumption increases and cell edge coverage is reduced
Solution Approach 1:
The system dynamically adjusts the waveform parameter based on UE state and network conditions. CP-OFDM is deployed when high throughput is needed and conditions permit, while DFT-s-OFDM is activated when power conservation or coverage extension is prioritized, thus resolving the contradiction between throughput and power efficiency.
4Productivity
If waveform selection is static, then device complexity is reduced, but performance optimization deteriorates under changing conditions
Solution Approach 1:
The patent implements a feedback mechanism where the base station continuously receives UE state information (location, signal strength, power status) and uses this feedback to dynamically select the optimal waveform. This feedback-driven approach enables performance optimization while keeping the UE relatively simple, as the complex decision-making resides at the base station.
Data Source
AI summary
Techniques for dynamically switching between uplink waveforms are discussed herein. For example, data received at a base station may provide the base station with information associated with a user equipment (UE). The base station may select a waveform for the UE to utilize during uplink transmissions in order to maximize performance of the UE. In some examples, the base station may select a DFT-s-OFDM or a CP-OFDM for the UE to utilize during the uplink transmission. The base station may determine which waveform to utilize based on data received from the UE, such as location data, signal data, and/or UE state data.