Waveform Format Selection for Uplink Communication
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Solution Overview
Problem
Current radio systems face challenges in selecting the optimal waveform format for uplink communication between a base station and mobile devices, particularly in managing Peak to Average Power Ratio (PAPR) and ensuring Quality of Service (QoS) and Quality of Experience (QoE), as existing methods either rely on network decisions or do not efficiently adapt to changing channel conditions.
Innovation Solution
A method in both base stations and mobile devices to select and reconfigure the waveform format based on received performance metrics and context information, allowing dynamic or semi-static signaling to choose between supported waveforms like CP-OFDM and DFTs-OFDM, optimizing PAPR and transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple waveform formats are tested to find the optimal one, then transmission quality and QoS are improved, but the time and complexity of waveform selection increases
Solution Approach 1:
The system performs preliminary waveform format capability reporting during initial connection setup, so that when uplink transmission is needed, the base station already has information about which waveform formats the mobile device supports. This eliminates the need for time-consuming waveform testing at transmission time.
Solution Approach 2:
The mobile device provides feedback information about its supported waveform formats to the base station. This feedback mechanism allows the base station to make informed waveform selection decisions without having to test multiple formats, thereby reducing selection time while maintaining transmission quality.
2Use of energy by moving object
If dynamic waveform selection is implemented, then power efficiency and QoE are improved, but the complexity of waveform management increases
Solution Approach 1:
The mobile device autonomously selects the waveform format for uplink transmission based on its capability information and the base station's scheduling decisions. This self-service approach eliminates the need for complex network-controlled waveform switching mechanisms, reducing overall system complexity while maintaining dynamic adaptability for power efficiency.
Solution Approach 2:
The system changes the waveform format parameter dynamically based on transmission conditions and device capabilities. By reporting supported waveform formats and allowing flexible selection, the system achieves power efficiency through parameter optimization without requiring complex management infrastructure.
3Adaptability or versatility
If waveform format information is extensively signaled, then the mobile device can make better waveform selection decisions, but the signaling overhead increases
Solution Approach 1:
The mobile device reports its supported waveform formats in advance during connection setup or capability exchange phases. This preliminary information provision enables efficient waveform selection without requiring continuous or extensive signaling during data transmission, thereby reducing signaling overhead while maintaining adaptability.
4Reliability
If the base station controls waveform selection, then transmission quality is optimized, but the mobile device has less autonomy in waveform choice
Solution Approach 1:
The mobile device provides its waveform capability information in advance, enabling the base station to make optimized waveform selection decisions based on both network conditions and device capabilities. This preliminary information exchange strikes a balance between base station control for quality optimization and device autonomy through capability-based selection.
Data Source
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AI summary
A method in a base station for selecting a waveform format used by a mobile device for an uplink communication with the base station is provided. The method includes receiving information from the mobile device about at least two different waveform formats supported by the mobile device for uplink communication according to a transmission standard. Further, the method includes selecting one of the at least two different waveform formats for uplink communication by the mobile device. The method additionally includes transmitting information about the selected waveform format for uplink communication to the mobile device.