Sidelink PRS Resource Reservation for Coordinated Positioning
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Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G, face challenges in efficiently managing and coordinating the transmission of sidelink positioning reference signals (PRSs) for vehicle-to-everything (V2X) applications, which are crucial for autonomous driving and accurate positioning.
Innovation Solution
A method and apparatus for user equipment (UE) to determine and reserve resources for sidelink PRS transmission through a sidelink control message, enabling coordinated and controlled transmission of PRSs among UEs, including determining resource sets and managing permissions for transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sidelink PRS transmission is enabled for accurate positioning, then positioning accuracy is improved, but resource coordination complexity increases
Solution Approach 1:
The patent applies preliminary action by having UEs reserve sidelink PRS resources in advance through control messages before actual PRS transmission occurs. This allows the system to achieve accurate positioning while reducing coordination complexity during the actual transmission phase, as resources are pre-allocated and confirmed through prior signaling exchanges.
2Measurement precision
If multiple UEs transmit sidelink PRS simultaneously for improved positioning, then positioning coverage is improved, but interference between transmissions increases
Solution Approach 1:
The patent applies segmentation by dividing the sidelink PRS transmission resources into separate time-frequency slots for different UEs. Through resource reservation control messages, the system allocates specific resources to different UE pairs, allowing multiple UEs to transmit PRS simultaneously without interference, thus improving positioning coverage while eliminating harmful interference.
3Reliability
If resource reservation control messages are implemented for coordinated PRS transmission, then transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent applies universality by designing the sidelink control message to serve multiple functions simultaneously: it reserves PRS resources, identifies the PRS transmission, and coordinates between UEs. This multi-functionality reduces the need for separate signaling messages, thereby improving transmission reliability while minimizing signaling overhead through a consolidated control mechanism.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a first UE determines a set of resources for transmission of one or more sidelink PRSs. The first UE transmits a sidelink control message to reserve the set of resources for the transmission of the one or more sidelink PRSs. In another aspect, the second UE may receive the sidelink control message, and may (e.g., transmit and/or receive/measure) the one or more PRSs in accordance with the sidelink control message. In another aspect, a third UE may receive the sidelink control message, and may determine whether a transmission by the third UE on some or all of the set of resources is permitted based on the sidelink control message.