Sidelink Feedback Interlace Allocation for Higher Channel Capacity
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Solution Overview
Problem
Existing sidelink communication systems face challenges in achieving optimal channel bandwidth occupancy and transmission power efficiency in sidelink feedback channels, leading to suboptimal capacity utilization and power limitations.
Innovation Solution
The solution involves transmitting sidelink feedback information through a configurable number of interlaced resource blocks (IRBs) across the sidelink feedback channel, allowing for increased transmission power and optimized resource distribution, including the use of dedicated and common interlaces, as well as dummy signals to manage power spectral density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If feedback is transmitted via a single resource block, then resource utilization is efficient, but transmission power is limited and capacity is insufficient
Solution Approach 1:
The feedback channel resources are segmented into multiple interlaces, where each interlace contains multiple resource blocks. This segmentation allows the UE to select and transmit feedback across multiple distributed resource blocks simultaneously, thereby increasing transmission power while maintaining manageable configuration complexity through standardized interlace structures.
2Productivity
If multiple interlaced resource blocks are used for feedback transmission, then transmission power and capacity are increased, but power spectral density limits may be exceeded
Solution Approach 1:
The patent applies local quality by distributing feedback transmissions across multiple geographically and frequency-separated resource blocks within interlaces. This distribution ensures that the power spectral density at any single resource block location remains within regulatory limits, while the aggregate transmission power across all selected resource blocks is sufficient to achieve the desired feedback capacity and reliability.
3Adaptability or versatility
If resource allocation is fixed, then system complexity is reduced, but adaptability to different channel conditions and capacity requirements is limited
Solution Approach 1:
The patent implements dynamic resource allocation where the number of interlaces, the number of resource blocks per interlace, and the specific resource block assignments can be dynamically configured based on channel conditions, traffic load, and capacity requirements. This dynamic approach enhances adaptability while controlling complexity through standardized configuration parameters and efficient resource management mechanisms.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for a user equipment (UE) to transmit feedback information via a configurable quantity of interlaced resource blocks (IRBs) in one or more interlaces of a sidelink feedback channel. For example, the UE may transmit feedback via multiple IRBs of an interlace. The UE may determine which IRBs to use in accordance with a configuration, which may indicate a quantity of IRBs, a distribution of the IRBs, a pattern of the IRBs, or any combination thereof. Additionally, or alternatively, the UE may determine to transmit feedback via multiple IRBs of an interlace that is different from a common interlace.