Interlaced Uplink Resource Allocation With IBGs and Low DCI Overhead
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Solution Overview
Problem
Existing frequency domain resource allocation methods for interlaced transmissions in NR-U incur high Downlink Control Information (DCI) overhead due to separate indications of full/partial interlace allocations and the portions of each partial interlace used, especially in wideband carriers.
Innovation Solution
The method employs Interlace Block Groups (IBGs) as a granularity for resource allocation, using a bitmap or Resource Indication Value (RIV) to indicate allocated IBGs, and optionally includes reserved resource indicators for flexible and low-overhead signaling of partial interlace allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate indications of full/partial interlace allocations and portions of each partial interlace are used, then resource allocation flexibility is improved, but DCI overhead increases
Solution Approach 1:
The patent combines the indication of interlace allocation and portion selection into a unified resource allocation mechanism. By merging these separate indications into a single resource allocation field, the patent reduces DCI overhead while maintaining the ability to flexibly allocate resources. The unified mechanism allows the network to indicate both which interlaces are allocated and which portions of those interlaces are used, eliminating the need for separate signaling.
Solution Approach 2:
The patent segments the resource allocation indication into interlace-level and portion-level components within a unified structure. By dividing the resource allocation space into interlaces and portions, the patent enables flexible resource allocation while using a compact unified indication mechanism. This segmentation allows precise resource allocation without requiring separate full interlace and partial interlace indications.
2Productivity
If fine-grained resource allocation is implemented, then resource utilization efficiency is improved, but signaling complexity increases
Solution Approach 1:
The patent introduces a new dimension for resource allocation by adding portion-level granularity within interlaces. This dimensional extension allows fine-grained resource allocation without proportionally increasing signaling complexity. The unified resource allocation field efficiently encodes both interlace selection and portion selection, achieving fine-grained control with compact signaling.
Solution Approach 2:
The patent changes the parameter structure of resource allocation by using a unified indication mechanism that simultaneously specifies interlace allocation and portion selection. This parameter transformation allows fine-grained resource allocation while maintaining efficient signaling through a compact unified field rather than multiple separate parameters.
3Reliability
If interlaced transmission is used to meet regulatory requirements, then compliance with occupied bandwidth and power spectral density is improved, but DCI overhead increases
Solution Approach 1:
The unified resource allocation field serves multiple functions simultaneously: it indicates interlace allocation, specifies portion selection, and supports both full and partial interlace allocations. This multi-functional mechanism enables interlaced transmission for regulatory compliance while reducing DCI overhead by eliminating the need for separate indication fields.
Data Source
AI summary
Systems and methods are disclosed herein that relate to frequency domain resource allocation for interlaced transmission. Embodiments of a method performed by a wireless device are disclosed. In one embodiment, a method performed by a wireless device comprises receiving a reserved resource indicator that indicates an uplink reserved resource pattern. The uplink reserved resource pattern defines at least which subset of uplink Physical Resource Blocks (PRBs) from among a set of allocated uplink PRBs are not available for uplink transmission. In this manner, a low overhead, flexible frequency domain resource allocation scheme for partial interlace transmission is provided.