Single-Carrier Waveform Configuration for FR2 Power Efficiency
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Solution Overview
Problem
Next Generation communication systems above 52.6 GHz face challenges in accommodating increased path loss and less efficient RF components, requiring support for both single-carrier and legacy orthogonal frequency division multiplexing waveforms to maintain coverage and efficiency.
Innovation Solution
User equipment transmits synchronization signal block capability and receives bandwidth parts with single-carrier waveforms having a peak-to-average ratio below a threshold, allowing configuration of waveforms that include indications of physical downlink control channels, enabling power-efficient single-carrier operation while maintaining legacy OFDMA options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If single-carrier waveform is used, then power efficiency is improved, but adaptability to legacy systems deteriorates
Solution Approach 1:
The system dynamically switches between single-carrier and legacy OFDM waveforms based on operational conditions, frequency range, and UE capabilities. The network can configure different waveforms for different bandwidth parts and synchronization signal blocks, enabling adaptive power efficiency improvement while maintaining legacy compatibility.
Solution Approach 2:
The patent introduces configurable parameters including PAR threshold, waveform type indicators, and SSB associations that allow the system to transition between single-carrier and legacy waveforms. By changing these parameters based on network conditions and UE capabilities, the system achieves both power efficiency and adaptability.
2Adaptability or versatility
If legacy OFDM waveform is used, then adaptability to existing systems is improved, but power efficiency deteriorates
Solution Approach 1:
The system segments the frequency spectrum into different bandwidth parts, with some parts using legacy OFDM for compatibility and others using single-carrier for power efficiency. This segmentation allows simultaneous support of both waveform types within the same cell, addressing both adaptability and power efficiency requirements.
Solution Approach 2:
The network entity is designed to universally support both legacy OFDM and single-carrier waveforms, enabling it to serve diverse UE types including legacy devices and power-efficient single-carrier optimized devices. The system provides multi-functionality by configuring different waveforms for different UEs or bandwidth parts as needed.
3Power
If single-carrier waveform with low PAR is used, then power amplifier efficiency is improved, but waveform configuration complexity increases
Solution Approach 1:
The network entity acts as an intermediary that manages waveform configuration complexity by automatically selecting and configuring appropriate waveforms based on UE capabilities and network conditions. This mediator approach shields the UE from complex configuration decisions while enabling power amplifier efficiency through single-carrier waveform selection.
Solution Approach 2:
The system performs preliminary configuration of waveform parameters including PAR thresholds, SSB associations, and bandwidth part configurations before actual data transmission. This preliminary setup simplifies real-time operation by pre-resolving configuration complexity during capability exchange and initial access phases.
Data Source
AI summary
Various communication systems may benefit from improved single carrier-based waveform techniques. An apparatus may comprise at least one memory comprising computer program code and at least one processor. The at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus at least to transmit at least one indication of synchronization signal block (SSB) to a network entity. The apparatus further receives at least one bandwidth part comprising at least one SSB associated with CP-OFDM waveform and/or at least one SSB below at least one threshold peak to average ratio. The apparatus further configures at least one waveform based upon the received at least one SSB. The at least one SSB below at least one threshold PAR comprise at least one indication of PDCCH.