Discontinuous Reception Timer Coordination for V2X Signals
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Solution Overview
Problem
In Vehicle to Everything (V2X) scenarios, the lack of coordination between transmitting UEs leads to disagreements in understanding the Discontinuous Reception (DRX) state, causing power consumption issues and air-interface interferences.
Innovation Solution
A method where a node receives K radio signals, each indicating an expiration value, and uses these values jointly to determine its DRX state, ensuring alignment with transmitting UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmitting UEs send radio signals independently without coordination, then each UE can transmit its data, but disagreements in DRX state understanding occur causing power consumption issues and air-interface interferences
Solution Approach 1:
The patent implements feedback mechanisms where UEs exchange DRX state information and timer status through radio signals. Each UE provides feedback about its DRX configuration and current timer state, allowing other UEs to adjust their transmissions accordingly. This feedback loop ensures all UEs maintain consistent understanding of DRX states, preventing unnecessary wake-ups and reducing power consumption while maintaining reliable communication.
Solution Approach 2:
The patent introduces DRX coordination messages as intermediary signals that mediate between multiple transmitting UEs. These coordination messages carry timer status and DRX state information, acting as intermediaries that enable UEs to synchronize their DRX behavior without direct interference. By using these intermediary signals, UEs can align their DRX states and avoid conflicting transmissions that would cause air-interface interference.
2Productivity
If multiple transmitting UEs send radio signals independently without coordination, then each UE can transmit its data, but air-interface interferences occur
Solution Approach 1:
The patent uses feedback mechanisms where UEs transmit DRX state information and receive acknowledgments about potential transmission conflicts. This feedback allows UEs to adjust their transmission timing and resources dynamically, maintaining high data transmission productivity while avoiding air-interface interference by coordinating with other UEs' DRX states.
Solution Approach 2:
The patent implements dynamic DRX coordination where UEs can adjust their DRX timer values and states based on real-time channel conditions and other UEs' transmissions. This dynamic adjustment allows the system to maintain high productivity by adapting transmission schedules to current conditions while minimizing air-interface interference through coordinated DRX behavior.
3Adaptability or versatility
If a UE monitors multiple radio signals from different transmitting UEs, then the UE can receive diverse data, but determining a unified DRX state becomes complex
Solution Approach 1:
The patent merges multiple DRX timer indications from different transmitting UEs into a single unified DRX state determination. By combining the timer status information from multiple sources and applying standardized comparison rules, the receiving UE can determine its DRX state without complex individual evaluations for each signal, thus maintaining adaptability while reducing determination complexity.
Solution Approach 2:
The patent transforms multiple DRX parameter indications into a unified set of comparison parameters that can be evaluated against a single DRX state. By standardizing the parameters from different transmitting UEs into a common format and using consistent evaluation criteria, the receiving UE can efficiently determine its DRX state while maintaining the ability to receive diverse data from multiple sources.
Data Source
AI summary
A method and a device used for DRX. A first node receives K radio signal, K being a positive integer greater than 1; and updates a first timer per candidate slot passed when a value of the first timer is unequal to a first expiration value; or stops a first timer when a value of the first timer is equal to a first expiration value; herein, physical-layer channels occupied by the K radio signals respectively comprise K PSSCHs, and the K radio signals respectively comprise K Destination ID fields, the K Destination ID fields respectively being indicated by K SCIs; active time of the first node comprises time while the first timer is running, the first timer being a DRX-related timer. The present application can avoid misunderstanding of the state of the first timer, thus reducing power consumption and air-interface interferences.