DRX Configuration Reconfiguration for D2D Communication
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Solution Overview
Problem
Current Device-to-Device (D2D) communication systems in wireless networks face challenges in determining when the Discontinuous Reception (DRX) configuration becomes unsuitable, leading to inefficient resource allocation and communication quality issues, especially in scenarios like vehicular communications and national security applications where energy efficiency is critical.
Innovation Solution
Implementing a DRX validity timer that expires when the experienced communication time deviates significantly from the expected time, triggering reconfiguration to a default or optimized DRX configuration, and allowing devices to notify each other and network nodes of unsuitable configurations for dynamic adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX configuration is applied for D2D communication, then energy consumption is reduced, but communication reliability deteriorates when configuration becomes outdated
Solution Approach 1:
The system performs preliminary actions by establishing DRX configuration validity timers and deviation thresholds before communication issues arise. When the timer expires or deviation exceeds the threshold, the system proactively triggers reconfiguration, preventing communication reliability degradation before it occurs.
Solution Approach 2:
The system implements feedback mechanisms by monitoring the actual communication time versus expected time, using validity timers to track configuration freshness, and automatically triggering reconfiguration when deviations are detected, thereby maintaining reliability while preserving energy efficiency.
2Use of energy by moving object
If DRX configuration is maintained for extended period, then energy efficiency is improved, but system adaptability deteriorates
Solution Approach 1:
The system applies dynamics by making the DRX configuration adaptive rather than static. Validity timers and deviation thresholds enable the system to dynamically adjust between maintaining stable configurations for energy efficiency and triggering reconfiguration when environmental changes require adaptability.
Solution Approach 2:
The system changes parameters by modifying DRX configuration based on monitored deviations and timer expiration. When the validity timer expires or communication time deviation exceeds thresholds, the system changes configuration parameters to adapt to new conditions while maintaining energy efficiency during stable periods.
3Reliability
If DRX reconfiguration is triggered frequently, then communication quality is maintained, but device complexity increases
Solution Approach 1:
The system uses parameter changes (validity timer values, deviation thresholds) to control reconfiguration frequency. By adjusting these parameters, the system balances maintaining communication quality through timely reconfiguration while avoiding excessive complexity from overly frequent updates.
Data Source
AI summary
A method (400) by a first wireless communication device (101) for controlling D2D communication between a first wireless communication device and a second wireless communication device (103) includes transmitting (402), to the second wireless communication device, a DRX configuration for the D2D communication with the second wireless communication device. The first wireless communication device applies (404) the DRX configuration for the D2D communication with the second wireless communication device and receives (406), from the second wireless communication device, a notification indicating that the DRX configuration is unsuitable. Based on the notification, the first wireless communication device reconfigures (408) the DRX configuration and/or notifying a network node that the applied DRX configuration is unsuitable.