Sidelink Positioning Cast Configuration for Multi-Anchor V2X
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring sidelink cast types for sidelink positioning, particularly in scenarios involving multiple anchor UEs, which can impact the reliability and latency of vehicle-to-everything (V2X) communications.
Innovation Solution
A method and apparatus for configuring sidelink cast types, such as unicast, groupcast, or broadcast, for sidelink positioning procedures, allowing efficient transmission and reception of sidelink positioning protocol messages and reference signals with anchor UEs, with the option to configure different cast types for each anchor UE independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sidelink positioning procedure is performed with multiple anchor UEs, then positioning accuracy is improved, but system complexity and configuration difficulty increase
Solution Approach 1:
The patent segments the sidelink positioning procedure into distinct phases: triggering phase, configuration phase, and execution phase. Each phase handles specific tasks independently, with the configuration phase preparing cast type settings for multiple anchor UEs before the actual positioning measurement. This segmentation reduces system complexity by organizing the multi-UE positioning process into manageable, sequential steps.
Solution Approach 2:
The patent applies preliminary action by configuring the sidelink cast type for each anchor UE before the actual positioning measurement takes place. The configuration phase prepares all necessary communication parameters and cast type settings in advance, so that when the positioning procedure executes, the UEs are already properly configured. This preliminary configuration reduces real-time complexity during the measurement phase.
2Reliability
If different cast types are configured for each anchor UE, then positioning reliability is improved, but configuration overhead and processing time increase
Solution Approach 1:
The patent implements dynamic cast type configuration where the sidelink cast type for each anchor UE can be independently selected from unicast, groupcast, or broadcast modes. This dynamic adaptability allows the system to choose the most reliable communication mode for each specific anchor UE based on channel conditions and UE capabilities, thereby improving positioning reliability while managing configuration overhead through flexible, condition-based selection.
Solution Approach 2:
The patent changes the communication parameter (cast type) for each anchor UE based on specific conditions and requirements. By allowing the cast type parameter to vary per anchor UE rather than using a fixed mode for all, the system optimizes reliability for each individual connection. The configuration overhead is managed by establishing these parameters during the preparation phase rather than dynamically adjusting them during measurement.
3Measurement precision
If sidelink positioning procedure is implemented, then positioning capability is enhanced, but latency in V2X communication increases
Solution Approach 1:
The patent implements periodic positioning procedures where the sidelink positioning is triggered at specific intervals or under specific conditions rather than continuously. This periodic execution allows the system to maintain positioning capability while reducing the overall time burden on V2X communication. The positioning procedure is activated periodically or event-driven, balancing positioning needs with latency requirements.
Solution Approach 2:
By performing configuration preparations in advance during the triggering and configuration phases, the patent minimizes the actual measurement time. All necessary cast type configurations and parameter settings are established before the positioning measurement begins, so the actual time consumed during the critical measurement phase is reduced, thereby lowering latency impact on V2X communication.
Data Source
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AI summary
The present disclosure relates to a method by which a user equipment (UE) performs sidelink positioning in a wireless communication system. Specifically, the method comprises the steps of: on the basis of a sidelink positioning procedure being triggered, setting a sidelink cast type for the sidelink positioning procedure associated with at least one anchor UE; and on the basis of the set sidelink cast type, performing the sidelink positioning procedure with the at least one anchor UE, wherein the sidelink cast type is set to at least one of unicast, group cast, and broadcast.