Wireless Resource Allocation for Flexible OFDM Configurations
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Solution Overview
Problem
Current wireless communication systems, such as LTE and emerging New Radio (NR) standards, face limitations in flexibility and efficiency, particularly in managing multiple component carriers and resource configurations, which affect communication performance across different scenarios like enhanced Mobile BroadBand, massive Machine Type Communication, and Ultra Reliable and Low Latency Communication.
Innovation Solution
The implementation of a wireless communication system that utilizes Orthogonal Frequency Division Multiplexing (OFDM) with cyclic prefix and discrete Fourier transform-spread OFDM, along with flexible resource grid configurations and carrier aggregation, to optimize subcarrier spacing, OFDM symbol configurations, and time unit management, enabling efficient communication across various scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed communication structure is used, then system complexity is reduced, but communication flexibility and efficiency are limited
Solution Approach 1:
The patent implements dynamic resource allocation where the network device can flexibly configure time units, OFDM symbols, and subcarrier spacing based on different service requirements. The system transitions from static to dynamic configuration, allowing resource grids to be adapted in real-time for different scenarios (eMBB, mMTC, URLLC) without requiring separate fixed structures for each case.
Solution Approach 2:
The patent creates a universal resource configuration framework that can handle multiple communication scenarios (enhanced Mobile BroadBand, massive Machine Type Communication, and Ultra Reliable and Low Latency Communication) using a single flexible system. The same resource grid structure can be configured for different purposes by adjusting parameters like subcarrier spacing and time unit definitions, eliminating the need for separate specialized structures.
2Productivity
If traditional resource allocation methods are used, then implementation is simpler, but communication efficiency across diverse scenarios is reduced
Solution Approach 1:
The patent utilizes parameter changes to optimize communication efficiency. By dynamically adjusting key parameters such as subcarrier spacing (Δf), cyclic prefix length, and time unit duration based on service requirements, the system achieves high efficiency for different scenarios: larger subcarrier spacing for URLLC to reduce latency, smaller spacing for eMBB to increase capacity, without requiring fundamentally different resource allocation mechanisms.
3Reliability
If multiple fixed communication structures are deployed for different scenarios, then scenario-specific performance is optimized, but system complexity and overhead increase
Solution Approach 1:
The patent implements a universal resource configuration framework that can handle multiple communication scenarios (enhanced Mobile BroadBand, massive Machine Type Communication, and Ultra Reliable and Low Latency Communication) using a single flexible system. The same resource grid structure can be configured for different purposes by adjusting parameters like subcarrier spacing and time unit definitions, eliminating the need for separate specialized structures.
Data Source
AI summary
A terminal device includes configuration circuitry configured to determine multiple resources for configured repetitions for a PUSCH based on information indicating a starting OFDM symbol index in a slot, a length of a PUSCH in a slot and the number of repetitions, and baseband circuitry configured to generate one or more instances each of which includes one or more resources from the multiple resources, wherein the baseband circuitry is configured to determine the each of the one or more instances such that the each of the one or more instances has no gap in time domain, or the baseband circuitry is configured to determine each of the one or more instances such that the each of the one or more instances has no gap for downlink reception in time domain.