Vehicle-to-Pedestrian Paging Indicator for Sidelink Power Management
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Solution Overview
Problem
Current vehicle-to-pedestrian (V2P) and pedestrian-to-vehicle (P2V) communication systems face challenges in achieving low latency and reliability while considering power consumption constraints, particularly for pedestrian user equipment (PUEs), which are essential for ensuring pedestrian and vehicular safety.
Innovation Solution
The proposed solution involves efficient resource allocation strategies for user equipment (UEs) to manage paging messages on sidelink channels, where a pedestrian UE monitors for a paging indicator to decode messages from a vehicle UE, and the vehicle UE transmits a paging indicator followed by the message on allocated resources, optimizing power usage and communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUE continuously monitors for V2P communication to ensure low latency and reliability, then safety response time is improved, but power consumption increases
Solution Approach 1:
The PUE transitions between wake states (monitoring for paging indicators) and sleep states (conserving power), rather than continuously monitoring. The UE wakes at specific intervals to check for paging indicators on the physical sidelink paging channel, then returns to sleep mode if no paging is detected, achieving periodic monitoring that balances safety requirements with power conservation
Solution Approach 2:
A paging indicator is introduced as an intermediary signal that alerts the PUE to the presence of actual V2P communication messages. Instead of continuously monitoring all communication channels, the PUE only needs to monitor for these brief paging indicators, which serve as wake-up calls to full monitoring mode when safety-critical information may be present
2Reliability
If VUE transmits paging messages frequently to ensure reliability, then communication reliability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The communication message is segmented into two parts: a brief paging indicator transmitted on the physical sidelink paging channel, and the full communication message transmitted on the physical sidelink shared channel. This segmentation allows the system to efficiently notify multiple PUEs of incoming messages without requiring continuous transmission of full messages, improving resource utilization while maintaining reliability
Solution Approach 2:
The paging indicator is transmitted in advance before the full communication message, allowing PUEs to prepare for upcoming communications. This preliminary notification enables PUEs to wake from sleep mode and tune to the appropriate resources just in time to receive the actual message, improving both reliability and resource efficiency
Data Source
AI summary
In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a pedestrian user equipment (PUE). The apparatus may be configured to monitor a first set of resources to detect a paging indicator indicating a paging message is carried on a second set of resources allocated for vehicle-to-pedestrian (V2P) communication consecutive to the first set of resources; to decode information on the second set of resources to detect the paging message from a second UE when the paging indicator is detected, the paging message being associated with the V2P communication; and to refrain from decoding the information on the second set of resources when the paging indicator is undetected.