Adaptive OFDM Waveform Configuration for 5G Spectral Efficiency
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Solution Overview
Problem
Current 4G wireless communication systems, particularly OFDM-based waveforms, are not adequately efficient for the diverse and dynamic requirements of 5G wireless communication systems, including enhanced mobile broadband, massive machine-type communications, and ultra-reliable low-latency communications, due to their static configuration of numerology parameters which lack forward compatibility and adaptability to changing traffic patterns and geographical locations.
Innovation Solution
The implementation of a method using configurable OFDM-based waveforms in 5G wireless communication systems, where user equipment receives synchronization signals to determine a base waveform numerology and system information, allowing for adaptive radio access by dynamically configuring and reconfiguring waveforms to optimize signal transmission and reception based on service demands and traffic patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If OFDM-based waveforms with static configuration of numerology parameters are used in 4G systems, then spectral efficiency is improved, but adaptability to diverse 5G service requirements deteriorates
Solution Approach 1:
The patent implements dynamic waveform configuration by allowing the network to selectively apply different numerology parameter sets (subcarrier spacing, cyclic prefix length, resource block size) based on real-time service requirements, traffic patterns, and channel conditions. This enables the system to transition from static 4G OFDM configuration to dynamic 5G adaptive configuration, resolving the contradiction between maintaining spectral efficiency and achieving service diversity adaptability.
Solution Approach 2:
The patent changes the numerical parameters of the OFDM waveform (subcarrier spacing Δf, cyclic prefix length CP, resource block size) to optimize performance for different 5G services. By allowing these parameters to be dynamically adjusted rather than fixed, the system maintains high spectral efficiency for traditional services while simultaneously achieving adaptability for emerging services like eMBB, mMTC, and URLLC.
2Device complexity
If static configuration of numerology parameters is used, then system complexity is reduced, but forward compatibility and adaptability to changing traffic patterns deteriorate
Solution Approach 1:
The patent segments the numerology configuration into multiple discrete parameter sets (different subcarrier spacings, cyclic prefix configurations) that can be independently selected and applied. This segmentation allows the system to maintain a manageable set of predefined configurations (controlling complexity) while providing sufficient variety to achieve forward compatibility and adaptability to future service requirements.
Solution Approach 2:
The patent creates a universal waveform configuration framework that can serve multiple 5G service types (eMBB, mMTC, URLLC) through a single adaptive mechanism. The same OFDM-based waveform structure with configurable numerology parameters can be universally applied across different services and scenarios, reducing the need for separate specialized systems while maintaining forward compatibility.
3Quantity of substance
If OFDM-based waveforms are used for 5G systems, then spectral efficiency is improved, but adaptability to different services and traffic patterns deteriorates
Solution Approach 1:
The patent introduces dynamic adaptability to OFDM-based waveforms by enabling real-time reconfiguration of numerology parameters based on service type and traffic conditions. This allows the same OFDM foundation to adapt to diverse 5G services (enhanced mobile broadband, massive machine-type communication, ultra-reliable low-latency communication) while maintaining the spectral efficiency benefits of OFDM through optimized parameter selection for each service scenario.
Data Source
AI summary
An advanced wireless communication system and method for use therein provides adaptive radio access using a plurality of configurable OFDM-based waveforms. The method comprises: receiving, at a UE and on a band-specific fixed system subband, one or more synchronisation signals; determining, at the UE, and according to the synchronisation signals, a base waveform numerology; and receiving, at the UE and according to the base waveform numerology, system information, wherein the system information defines parameters for a service or services.