V2X Communication Power Management via Reference Signal Variation Detection
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Solution Overview
Problem
Current V2X communication systems face challenges in efficiently managing power consumption while ensuring continuous vehicle-to-portable device (V2P) communication, particularly for battery-powered portable UEs, which are a safety concern when moving, and require balancing power usage with safety benefits.
Innovation Solution
The system triggers participation of portable UEs in V2P communications based on variations in reference signal characteristics, such as RSRP and RSRQ, indicating movement, and ensures the UE is within a predetermined location relative to transportation networks, thereby optimizing power usage and safety benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous V2P communication is maintained for portable UEs, then safety benefits are ensured, but power consumption increases significantly
Solution Approach 1:
The system dynamically adjusts the communication state of portable UEs based on real-time movement detection. When movement is detected through reference signal characteristics, the UE transitions to an active communication state; when stationary, it transitions to an inactive state, optimizing power consumption while maintaining safety when needed
Solution Approach 2:
The system changes the operational parameters of portable UEs based on movement status. The communication activation parameter is adjusted from active to inactive state when no movement is detected, directly reducing power consumption while maintaining the ability to activate when safety requirements demand
2Reliability
If V2P communication is activated for all portable UEs, then safety coverage is maximized, but unnecessary power consumption occurs for stationary devices
Solution Approach 1:
The system applies different communication states to different portable UEs based on their individual movement status. Each UE is evaluated independently, with only those showing movement characteristics activated for V2P communication, eliminating unnecessary power consumption from stationary devices while maintaining coverage for moving ones
Solution Approach 2:
Instead of activating all portable UEs for V2P communication, the system applies partial action by selectively activating only those UEs that meet movement criteria. This reduces overall energy loss while maintaining sufficient safety coverage through targeted activation of mobile devices
Data Source
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AI summary
This specification describes a method comprising responding to a detection (S3.4) of a variation in at least one measured characteristic of a reference signal transmitted from an access point to a portable device by triggering (S3.6) participation by the portable device in vehicle-to-portable device communications. In some examples, the triggering (S3.6) of the participation in the vehicle-to-portable device communications in response to the detection of the variation in the at least one measured characteristic of the reference signal may be performed only if it has been determined (S3.2) that a location of the portable device satisfies a predetermined condition.