V2X Server DRX Mode Control for Safety
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Solution Overview
Problem
In V2X communication systems, the use of discontinuous reception (DRX) mode to reduce power consumption can lead to the loss of important safety messages, particularly in scenarios where road safety messages are transmitted and received.
Innovation Solution
A server apparatus that communicates with V2X terminal apparatuses, accessing a database indicating risk levels for geographical areas. The server determines if a terminal is in a high-risk area and notifies it not to operate in DRX mode, ensuring timely receipt of safety messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous reception (DRX) mode is used to reduce power consumption, then energy efficiency is improved, but reliability of safety message reception deteriorates
Solution Approach 1:
The patent applies local quality by differentiating reception modes based on geographical location. Terminals in high-risk areas are restricted from using DRX mode and must use continuous reception, while terminals in low-risk areas are permitted to use DRX mode for power saving. This location-dependent quality differentiation resolves the contradiction by applying the appropriate reception mode to each local context.
Solution Approach 2:
The patent implements dynamics by making the reception mode flexible and adaptable rather than fixed. The server dynamically determines whether a terminal may use DRX mode based on real-time location information and risk level data. This dynamic adjustment allows the system to optimize between power consumption and reliability depending on the terminal's current geographical context.
2Adaptability or versatility
If autonomous determination of DRX mode by terminal is allowed, then device autonomy is improved, but safety assurance deteriorates
Solution Approach 1:
The patent introduces an intermediary (the server) that mediates between the terminal's autonomous capabilities and safety requirements. The server receives location information from the terminal, consults risk level data, and makes the final determination about DRX mode permission. This intermediary ensures that safety considerations are properly weighed while still allowing terminals to operate autonomously within permitted parameters.
Solution Approach 2:
The patent implements feedback by having the server continuously monitor terminal locations and provide guidance decisions. The server uses risk level data associated with different geographical areas to feedback control decisions to terminals about whether DRX mode is permitted. This feedback mechanism ensures that terminal autonomy operates within safety boundaries.
Data Source
AI summary
There is provided a server apparatus including a communication unit to communicate with one or more terminal apparatuses that operate as clients of a V2X application, and a server processing unit to operate as a server of the V2X application. The server processing unit is capable of accessing a database indicating a risk level for each geographical area predefined for the V2X application. The server processing unit receives location information of a first terminal apparatus via the communication unit, determines, on the basis of the location information, that the first terminal apparatus is located in a first geographical area of the plurality of geographical areas, and when the database indicates that a risk level of the first geographical area is high, notifies the first terminal apparatus that it is not allowed to operate in a discontinuous reception mode.