Sub-Band Full-Duplex Resource Allocation for Spectral Efficiency
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Solution Overview
Problem
Current technologies fail to provide organized and reliable solutions for enabling sub-band full-duplex (SBFD) communications, particularly in allocating channel resources such as physical resource blocks (PRBs) and resource block groups (RBGs) to sub-bands, leading to inefficiencies in spectral efficiency and resource utilization.
Innovation Solution
The techniques described involve determining and allocating time and frequency resources for SBFD communications, including identifying channel resources that fully or partially overlap with sub-bands, and applying rules to these resources to enable simultaneous transmission and reception within the same frequency band, utilizing signal processing techniques like beamforming and interference cancellation to manage interference and optimize symbol detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional resource allocation methods are used for full-duplex communications, then device complexity is reduced, but spectral efficiency and resource utilization deteriorate
Solution Approach 1:
The patent segments the frequency band into multiple sub-bands, with specific sub-bands allocated for downlink and uplink transmissions. This segmentation enables simultaneous bidirectional communication while managing interference through structured resource allocation, directly improving spectral efficiency without overwhelming system complexity
Solution Approach 2:
The patent introduces a frequency-domain dimension by dividing the spectrum into sub-bands for different transmission directions. This dimensional approach allows full-duplex operation by separating uplink and downlink in the frequency domain while maintaining time-domain simultaneity, thereby enhancing resource utilization
2Productivity
If sub-band full-duplex communications are implemented without organized resource allocation, then communication capacity increases, but resource utilization deteriorates
Solution Approach 1:
The patent applies local quality by assigning different resource allocation rules to different sub-bands based on their specific usage requirements. Downlink sub-bands and uplink sub-bands have differentiated resource block group configurations, enabling optimized resource utilization tailored to each transmission direction's characteristics
Solution Approach 2:
The patent changes resource allocation parameters dynamically by configuring different resource block group sizes, starting positions, and allocation patterns for different sub-bands. These parameter adjustments enable the system to optimize resource utilization while maintaining high communication capacity across varying traffic conditions
3Productivity
If channel resources are allocated to sub-bands without overlap management, then resource allocation simplicity increases, but spectral efficiency deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where resource block groups can be flexibly assigned to different sub-bands based on traffic demands and interference conditions. The system dynamically adjusts the number and position of resource block groups in each sub-band, enabling optimized spectral efficiency while managing allocation complexity through adaptive rather than static rules
Solution Approach 2:
The patent incorporates feedback mechanisms where the system monitors resource utilization and interference levels across sub-bands, then adjusts resource block group allocations accordingly. This feedback-driven approach optimizes spectral efficiency by continuously adapting resource distribution while managing allocation complexity through intelligent control rather than rigid rules
Data Source
AI summary
The techniques herein include solutions for enabling a user equipment (UE) and a base station to communicate via sub-band full-duplex (SBFD). A UE may receive, from a base station, resource allocation information for SBFD communications. The information may include downlink (DL) and/or uplink (UL) channel resources that overlap, in a frequency domain, with sub-bands associated with the SBFD communications. The UE may generate UL information to be communicated to the base station and engage in SBFD communication by: transmitting, via the UL channel resources that overlap in the frequency domain with the UL sub-band, the UL information as part of the SBFD communications; and receiving, via the DL channel resources that overlap with the DL sub-band, DL information as part of the SBFD communications. Many other aspects and examples of the techniques are also described herein.