Frequency-Domain Allocation for SBFD Uplink Overlap Avoidance
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Solution Overview
Problem
In wireless communication systems using sub-band full-duplex (SBFD) carriers, conflicts arise when downlink resource allocations overlap with uplink portions of a slot, leading to potential interference and reduced device performance and system throughput.
Innovation Solution
User equipment (UE) disregards downlink resource allocations that overlap with uplink portions by treating those resources as unavailable for downlink transmission, thereby resolving conflicts and ensuring proper communication directionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink resource allocation is performed without considering uplink portions in SBFD slots, then resource utilization efficiency is improved, but interference between downlink and uplink transmissions occurs
Solution Approach 1:
The patent segments the frequency spectrum into distinct downlink and uplink portions within the same time slot in SBFD configurations. The downlink resource allocation is performed only in frequency resources designated for downlink, avoiding overlap with uplink portions. This segmentation prevents interference while maintaining efficient resource utilization by fully utilizing both downlink and uplink frequency portions simultaneously.
2Quantity of substance
If downlink resource allocation overlaps with uplink portions in SBFD slots, then frequency resource utilization is improved, but device performance and system throughput are reduced
Solution Approach 1:
The patent applies local quality by differentiating resource allocation rules for different frequency portions within the same slot. Downlink resource allocation is applied only to frequency resources designated for downlink in SBFD slots, while uplink portions are excluded from downlink allocation. This ensures that each frequency portion is used for its intended direction, maintaining both high resource utilization and reliable device performance without interference.
Data Source
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AI summary
Aspects of the disclosure relate to a downlink (DL) resource allocation feature in a wireless communication system, configured to address an issue that may arise in a sub band full duplex (SBFD) carrier (also sometimes called a flexible duplex carrier). For example, on an SBFD carrier, a slot may have a format where an uplink (UL) portion of the carrier is between two DL portions of the carrier. In a case where a scheduler operating in a New Radio (NR) network utilizes DL resource allocation of a particular type, it may arise that a portion of the DL allocation falls in the UL portion of the carrier. Accordingly, a scheduled entity may add the UL portion of the carrier to a set of resources that are indicated as not available for DL transmission. Other aspects, embodiments, and features are also claimed and described.