SBFD Allocation Across Disjoint Frequency Bands for 5G NR
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges in optimizing resource allocation for efficient full duplex communication, leading to inefficiencies in utilizing disjoint frequency bands.
Innovation Solution
Implementing sub-band full duplex (SBFD) resource allocation, where a user equipment (UE) and network node communicate using disjoint sets of resources in different frequency bands within a SBFD slot, enabling simultaneous transmission and reception across disjoint sub-bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional resource allocation methods are used in full duplex communication, then system simplicity is maintained, but resource allocation efficiency deteriorates due to inability to utilize disjoint frequency bands effectively
Solution Approach 1:
The patent segments the frequency band into multiple sub-bands, allowing different sub-bands to be allocated for different communication directions (uplink/downlink) within the same time slot. This segmentation enables efficient full duplex communication by separating frequency resources while maintaining time synchronization, directly improving resource allocation efficiency without requiring complex cross-time coordination.
Solution Approach 2:
The patent introduces frequency dimension segmentation within the time domain, creating a two-dimensional resource allocation structure (time x frequency sub-bands). This allows simultaneous uplink and downlink transmissions in different frequency sub-bands during the same time slot, transforming traditional time-division or frequency-division approaches into a more flexible multi-dimensional resource allocation scheme.
2Productivity
If disjoint frequency bands are used for full duplex communication, then resource utilization is improved, but interference management becomes more challenging
Solution Approach 1:
The patent applies local quality by assigning different frequency sub-bands to different communication directions based on local interference conditions and channel characteristics. Each sub-band can be optimized independently for its specific communication direction, allowing the system to exploit favorable channel conditions in each sub-band while avoiding interference-prone frequency regions, thereby improving overall network utilization.
3Reliability
If sub-band full duplex allocation is implemented, then communication performance is improved through simultaneous transmission and reception, but resource allocation complexity increases
Solution Approach 1:
The patent creates a universal resource allocation framework that can handle multiple communication modes (full duplex, half duplex, TDD, FDD) through a single sub-band allocation mechanism. The same sub-band division approach can be adapted to different duplexing scenarios, providing multi-functionality that improves communication performance while avoiding the need for separate complex allocation mechanisms for each mode.
Data Source
AI summary
A method of wireless communication at a user equipment (UE) and related apparatus are provided. In the method, the UE receives a resource allocation for a first set of resources in a first frequency band that is disjoint from a second frequency band in a sub-band full duplex (SBFD) slot, and communicates with a network node using the first set of resources in the first frequency band and a corresponding second set of resources in the second frequency band. The method improves the resource allocation efficiency for scheduling resources over multiple disjoint sub-bands.