Multi-Carrier Resource Selection for V2X Reliability
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Solution Overview
Problem
In the multi-carrier scenario of V2X technology, existing resource selection methods lead to data discard and compromised safety due to limited resource selection, resulting in reduced data transmission reliability and system performance.
Innovation Solution
The user equipment (UE) selects a resource on a carrier based on the selected resources of other carriers and additional constraints like transmit chains, transmit power, resource blocks, frequency domain spacing, and half-duplex limitations, ensuring data transmission within its capabilities and maintaining receiving capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource is independently selected on each carrier using existing methods, then resource selection simplicity is maintained, but data transmission reliability deteriorates due to data discard when transmit capacity is exceeded
Solution Approach 1:
The patent merges resource selection across multiple carriers by considering selected resources on other carriers when selecting resources on the current carrier. This combines previously independent selection processes into a coordinated multi-carrier resource selection mechanism, preventing data discard due to transmit chain limitations while maintaining manageable complexity through structured constraint application.
Solution Approach 2:
The patent applies preliminary filtering of candidate resources based on preset conditions related to UE capabilities (transmit chains, power, half-duplex constraints) before final resource selection. This preliminary action ensures that only feasible resources are considered, preventing future data transmission failures without requiring complex real-time adjustments.
2Productivity
If multiple carriers are used for data transmission, then system capacity is improved, but data transmission reliability deteriorates due to half-duplex limitations and transmit power constraints
Solution Approach 1:
The patent dynamically adjusts resource selection based on UE operational state and capability constraints. By making resource selection adaptive to transmit chain availability, power constraints, and half-duplex status, the system maintains high capacity utilization while ensuring reliable transmission within actual UE capabilities, preventing data discard scenarios.
Solution Approach 2:
The patent changes the selection criteria parameters by incorporating UE-specific constraints (transmit chain count, power budget, half-duplex limitations) into the resource selection process. This parameter adjustment ensures that multi-carrier operation remains within UE capabilities, maintaining both high system capacity and transmission reliability.
3Reliability
If resource selection does not consider UE transmit capabilities, then selection speed is maintained, but data transmission reliability deteriorates due to exceeded transmit capacity
Solution Approach 1:
The patent performs preliminary filtering of candidate resources based on preset conditions related to UE capabilities before final selection. This advance preparation of feasible resource sets ensures rapid selection while guaranteeing that chosen resources respect transmit chain, power, and half-duplex constraints, achieving both reliability and speed.
Solution Approach 2:
The patent segments the resource selection process into distinct stages: candidate resource identification, preset condition filtering based on UE capabilities, and final selection from filtered candidates. This segmentation allows efficient processing at each stage while ensuring comprehensive capability compliance, balancing selection speed with transmission reliability.
Data Source
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AI summary
This application provides a communication method and a terminal device. The communication method includes: determining, by UE, a candidate resource set on a first carrier, where the first carrier is a carrier on which a resource is currently to be selected, and the first carrier is used to transmit first data; selecting, by the UE, a resource on the first carrier from the candidate resource set based on a preset condition, where the preset condition is determined based on resources selected by the UE on other carriers and one or more of the following: a quantity of transmit chains of the UE, a transmit power of the UE, a quantity of resource blocks occupied by the UE, a frequency domain spacing between a plurality of carriers or a plurality of frequency domain resources occupied by the UE, a carrier switching time of the UE, and a half-duplex limitation to the UE, the other carriers indicate all carriers on which the UE has currently selected a resource, and the other carriers are used to transmit second data; and sending, by the UE, the first data on the resource selected on the first carrier. In this application, data transmission reliability can be improved to some extent, and further, safety of a vehicle can be improved.