V2X Terminal PSCCH Resource Reservation for Mode Coexistence
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Solution Overview
Problem
In current V2X communication systems, MODE 3 and MODE 4 terminals coexisting in the same resource pool are not efficiently managed, leading to potential interference and inefficient resource utilization, as each type of terminal operates independently without considering the presence of the other, resulting in suboptimal communication performance.
Innovation Solution
A method is introduced where MODE 3 terminals set the resource reservation field on a PSCCH to an SL SPS period, allowing MODE 4 terminals to identify and avoid resources used by MODE 3 terminals, enabling efficient coexistence and improved communication by allowing MODE 4 terminals to select alternative resources, thereby reducing interference and enhancing overall system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MODE 3 and MODE 4 terminals operate independently in the same resource pool, then resource utilization efficiency is improved, but interference between different mode terminals increases and communication reliability deteriorates
Solution Approach 1:
The patent introduces sensing measurement as an intermediary mechanism that enables MODE 4 terminals to detect and identify resources used by MODE 3 terminals. By implementing sensing measurements, MODE 4 terminals can distinguish between resources occupied by MODE 3 terminals and those available for MODE 4 communication, thereby reducing interference while maintaining high resource utilization efficiency
Solution Approach 2:
The patent implements a feedback mechanism where MODE 4 terminals perform sensing measurements to obtain information about resources used by MODE 3 terminals. This feedback information is then used to adjust resource selection and avoid conflicts, ensuring reliable communication while efficiently utilizing available resources
2Reliability
If separate resource pools are allocated for MODE 3 and MODE 4 terminals, then interference between modes is eliminated, but resource utilization efficiency deteriorates due to resource fragmentation
Solution Approach 1:
The patent merges the resource pools for MODE 3 and MODE 4 terminals into a single shared resource pool, eliminating resource fragmentation and improving utilization efficiency. Sensing measurements are introduced to manage the coexistence of different mode terminals within this unified pool, ensuring that interference is avoided while maximizing resource usage
Data Source
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AI summary
The present invention provides a method for executing physical sidelink control channel (PSCCH) transmission executed by a vehicle-to-X (V2X) terminal in a wireless communication system, the method comprising: receiving sidelink semi-persistent scheduling (SPS) configuration information, wherein the sidelink SPS configuration information includes at least one or more sidelink SPS configuration indexes, and SPS periods of the respective at least one or more sidelink SPS configuration indexes; receiving downlink control information including activation information, wherein the activation information indicates a specific SPS configuration index, among the at least one or more sidelink SPS configuration indexes, that is activated; and executing PSCCH transmission on the basis of the sidelink SPS configuration information and the downlink control information, wherein, when executing the PSCCH transmission, the terminal configures, as the SPS period value of the specific SPS configuration index, a resource reservation field value on the PSCCH.