Sidelink BWP Detection via Periodic Gaps
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately detecting active sidelink bandwidth parts (BWPs) on component carriers, leading to potential conflicts and performance degradation due to mis-detection of resources reserved by other UEs with fully or partially overlapping BWPs.
Innovation Solution
A user equipment (UE) is configured to receive a sidelink BWP configuration, which enables it to detect active sidelink BWPs on a component carrier based on periodic measurements and decoded scheduling SCIs during detection gaps, avoiding resource conflicts by sensing and shifting its BWP within configured detection gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a UE monitors all component carriers continuously to detect active sidelink BWPs, then detection accuracy improves, but power consumption increases
Solution Approach 1:
The patent implements periodic BWP detection by configuring detection gaps at specific intervals (e.g., every 20 or 40 milliseconds) rather than continuous monitoring. The UE performs BWP detection only during these scheduled detection gaps, achieving adequate detection accuracy while dramatically reducing power consumption compared to continuous monitoring approaches.
Solution Approach 2:
The network configures the UE with detection gap patterns and BWP configuration information in advance through RRC signaling. This preliminary configuration allows the UE to prepare for efficient periodic detection without needing to continuously monitor all component carriers, resolving the contradiction between detection accuracy and power consumption.
2Reliability
If a UE uses wideband BWP configuration to improve coverage, then signal reception improves, but resource conflict with other UEs increases
Solution Approach 1:
The patent enables dynamic BWP switching where UEs can transition between wideband and narrowband configurations based on real-time conditions. During detection gaps, UEs sense the BWP status and can switch to narrowband modes when conflicts are detected, or use wideband modes when coverage is the primary concern, thus dynamically balancing reliability and conflict avoidance.
Solution Approach 2:
The network can dynamically adjust BWP parameters including bandwidth size, frequency location, and detection gap patterns based on traffic conditions and interference levels. This allows the system to optimize the balance between coverage (wideband) and conflict reduction (narrowband with detection) by changing operational parameters rather than being fixed in one configuration.
3Measurement precision
If a UE performs frequent BWP detection to avoid resource conflicts, then resource allocation accuracy improves, but detection time increases
Solution Approach 1:
The patent establishes periodic detection gaps at optimized intervals that balance detection accuracy with time efficiency. Rather than continuous or overly frequent detection, the system schedules detections at regular intervals (e.g., 20-40ms) which provides sufficient resource allocation accuracy while limiting the total detection time and processing overhead.
Solution Approach 2:
The UE performs partial detection by focusing monitoring efforts only during configured detection gaps rather than continuous monitoring. This partial action approach achieves adequate resource allocation accuracy for sidelink communications while significantly reducing the time and processing resources dedicated to detection activities.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a sidelink bandwidth part (BWP) configuration. The UE may detect an active sidelink BWP on a component carrier based at least in part on the sidelink BWP configuration. Numerous other aspects are described.