V2X Resource Selection via SIB Carrier Frequency Indication
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Solution Overview
Problem
Current mobile communication systems face challenges in supporting vehicle-to-everything (V2X) communication, particularly in selecting an appropriate cell or carrier frequency for efficient cross-carrier scheduling operations over the PC5 interface.
Innovation Solution
A method where a user equipment (UE) operates on a carrier frequency indicated in a system information block (SIB) broadcasted by the cell, with the option to select resources from a pool configured by the base station for V2X communication, allowing for efficient V2X communication and cross-carrier scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE performs V2X communication over PC5 interface, then V2X communication capability is enabled, but difficulty in selecting appropriate cell or carrier frequency arises
Solution Approach 1:
The patent introduces a base station as an intermediary that provides system information blocks (SIB) containing carrier frequency indications and resource pool configurations. This intermediary resolves the UE's difficulty in selecting appropriate cells by providing curated information about suitable frequencies and resources for V2X communication over PC5 interface.
Solution Approach 2:
The base station performs preliminary actions by pre-configuring and broadcasting system information blocks that contain carrier frequency indications and resource pool configurations before the UE needs to perform V2X communication. This preliminary preparation eliminates the complexity of real-time cell selection by providing advance guidance on appropriate frequencies.
2Adaptability or versatility
If cross-carrier scheduling operation is implemented for V2X communication, then scheduling flexibility is improved, but complexity of resource selection increases
Solution Approach 1:
The patent segments the resource selection process into distinct components: the base station handles configuration and scheduling decisions by providing SIB messages with carrier frequency indications, while the UE handles execution by selecting resources from the configured resource pools. This segmentation reduces UE complexity while maintaining scheduling flexibility.
Solution Approach 2:
The base station acts as a mediator that simplifies the cross-carrier scheduling complexity by providing pre-configured resource pool information and carrier frequency indications. This intermediary approach allows flexible scheduling without requiring the UE to independently manage the complexity of cross-carrier resource selection.
Data Source
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AI summary
A method for performing a V2X communication in a wireless communication system and a device therefor are disclosed. A method for performing, by a user equipment (UE), a vehicle-to-everything (V2X) communication in a wireless communication system includes receiving a transmission request of a V2X message from an upper layer, when receiving the transmission request of the V2X message, selecting a resource for the V2X communication over a PC5 interface if the UE is 'Not served by evolved universal terrestrial radio access network (E-UTRAN) for V2X communication', and performing a transmission for the V2X communication over the PC5 interface. If the UE is camped on a cell supporting the V2X communication, and a carrier frequency provided by the cell on which the UE is camped does not belong to a pre-configured carrier frequency the UE intends to use, the UE is considered as 'Not served by E-UTRAN for V2X communication'.