V2X Resource Pool Configuration for Flexible Slot Formats
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Solution Overview
Problem
The flexible slot format in 5G NR systems leads to inefficient utilization of uplink resources for V2X communications, as some uplink symbols are not suitable for Vehicle-to-Everything (V2X) traffic requirements.
Innovation Solution
A sidelink resource pool configuration method that determines a resource pool based on a time-unit format and additional information, excluding slots with fewer uplink symbols to ensure effective resource allocation for V2X communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible slot format is adopted in 5G NR system, then uplink and downlink ratios can be adjusted flexibly, but some uplink symbols are not suitable for V2X communications resulting in inefficient resource utilization
Solution Approach 1:
The patent segments the slot format by identifying and separating flexible symbols from fixed uplink symbols. It defines a first set of slots with fixed uplink symbols and a second set of slots with flexible symbols, then further divides the second set into third slots (with at least one flexible symbol) and fourth slots (without flexible symbols). This segmentation allows selective inclusion of only suitable slots in the V2X resource pool, resolving the contradiction between flexibility and resource utilization efficiency.
Solution Approach 2:
The patent applies local quality by differentiating the suitability of different slots for V2X communications. It identifies that only slots with specific characteristics (third slots with flexible symbols meeting certain criteria) are suitable for V2X, while excluding others. This localized differentiation ensures that only high-quality resources are allocated to V2X, improving efficiency while maintaining overall system flexibility.
2Adaptability or versatility
If too flexible uplink and downlink ratios are used, then adaptability to different scenarios is improved, but the number of suitable resources for V2X communications decreases
Solution Approach 1:
The patent segments slots into multiple categories based on their suitability for V2X: first slots (fixed uplink, suitable), second slots (flexible, potentially suitable), third slots (flexible with specific characteristics, suitable), and fourth slots (without flexible symbols, unsuitable). This segmentation enables selective inclusion, maintaining adaptability while ensuring sufficient suitable resources for V2X.
Solution Approach 2:
The patent changes the parameter of slot format selection by introducing criteria based on the number and arrangement of flexible symbols. It defines specific conditions (third slots having at least one flexible symbol) that must be met for a slot to be included in the V2X resource pool. This parameter-based filtering maintains system adaptability while ensuring adequate suitable resources are available for V2X communications.
Data Source
AI summary
The present disclosure method and device in node used for wireless communication. A first node receives first information, the first information being used for indicating a first time-unit format; determines second information; and determines a first resource pool; herein, a first time window comprises Q first-type time-domain-resource blocks, the Q being a positive integer greater than 1; a first symbol is one of the positive integer number of multicarrier symbol(s) comprised in any of the Q first-type time-domain-resource blocks; the first time-unit format is used for indicating whether the first symbol is a first-type symbol; the second information is used for indicating a positive integer number of first-type time-domain-resource block(s) out of a first time-domain-resource-block subset. A flexible slot format has been taken into account in the process of V2X resource pool configuration in the present disclosure, thus ensuring that the resource pool can effectively meet traffic requirements.