Dynamic SBFD Scheduling for Simultaneous Uplink and Downlink
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Solution Overview
Problem
There is a need for improvements in 5G NR technology to enhance efficiency and reduce latency in mobility of user equipments (UEs) communicating with network entities, particularly in sub-band full duplex (SBFD) communications.
Innovation Solution
Implementing dynamic scheduling of SBFD operations by modifying initial resource configurations to allow simultaneous uplink and downlink communications on a sub-band basis within a slot, enabling flexible and dynamic resource adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional time division duplex (TDD) is used to allocate separate time slots for uplink and downlink communications, then interference between uplink and downlink is avoided, but uplink duty cycle is limited and latency is increased
Solution Approach 1:
The patent segments the frequency band into multiple sub-bands, allowing different sub-bands to be allocated for uplink and downlink communications simultaneously. This segmentation enables full-duplex operation by dividing the frequency spectrum into independent communication channels, thereby increasing uplink duty cycle while maintaining interference avoidance through frequency separation.
Solution Approach 2:
The patent transitions from time-domain separation (TDD) to frequency-domain separation (FDD) by introducing sub-band division. This dimensional change from time slots to frequency sub-bands enables simultaneous uplink and downlink communications, resolving the contradiction between interference avoidance and uplink duty cycle improvement.
2Device complexity
If static resource configuration is used for SBFD communications, then resource allocation is simple and predictable, but adaptability to changing channel conditions and traffic demands is poor
Solution Approach 1:
The patent implements dynamic resource configuration for SBFD communications, where resource allocation can be adjusted in real-time based on channel conditions, traffic demands, and interference levels. This dynamic approach allows the system to adapt to changing conditions while maintaining operational simplicity through standardized configuration procedures.
Solution Approach 2:
The patent changes key resource allocation parameters such as sub-band assignments, slot configurations, and power levels dynamically based on network conditions. These parameter changes enable adaptive resource allocation that responds to varying channel quality and traffic requirements while maintaining system simplicity through controlled parameter adjustment mechanisms.
3Productivity
If sub-band full duplex (SBFD) communications are implemented with dynamic scheduling, then uplink duty cycle and spectrum efficiency are improved, but system complexity and scheduling overhead increase
Solution Approach 1:
The patent segments the frequency spectrum into multiple sub-bands that can be independently scheduled and allocated. This segmentation simplifies the scheduling complexity by allowing independent control of each sub-band while achieving high spectrum efficiency through optimized frequency resource utilization across multiple sub-bands.
Solution Approach 2:
The patent applies dynamic scheduling selectively to specific sub-bands and time slots rather than uniformly across all resources. This partial action approach reduces scheduling overhead and system complexity by applying complex scheduling only where necessary, while maintaining high spectrum efficiency through targeted resource optimization.
Data Source
AI summary
Aspects of the present disclosure provide techniques for sub-band conversion or cancellation for dynamic scheduling of sub-band full duplex (SBFD) operations between the base station and UEs. The capability to communicate via simultaneous UL and DL transmissions through dynamic scheduling allows for increased uplink duty cycle leading to latency reduction (e.g., it is possible to receive DL signal in an UL only slots, which can enable latency savings) and improved uplink coverage. Additionally enabling flexible and dynamic UL and DL resource adaptation in accordance with techniques of the present disclosure also provide enhanced system capacity, resource utilization, and spectrum efficiency.