Sidelink DRX Control via MAC CE for Power and Latency
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Solution Overview
Problem
Current technologies face challenges in effectively controlling the discontinuous reception (DRX) status of terminal devices in wireless communication networks, particularly in managing DRX cycles and resource allocation for sidelink transmissions, which affects power consumption and latency performance.
Innovation Solution
The method involves transmitting and receiving messages over sidelinks to control the DRX status of terminal devices, aligning DRX active periods between devices, and using MAC control elements to manage DRX configurations, thereby optimizing DRX cycles and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX operation is configured to reduce power consumption, then energy efficiency is improved, but latency performance deteriorates due to discontinuous monitoring
Solution Approach 1:
The patent implements dynamic DRX configuration where the network can adjust DRX parameters (cycle length, active time, offset) based on current traffic conditions and service requirements. This allows the system to switch between aggressive power-saving modes and low-latency modes dynamically, resolving the contradiction between energy efficiency and latency performance.
Solution Approach 2:
The patent changes DRX operational parameters including cycle duration, active time window, and offset values to optimize both power consumption and latency. By adjusting these parameters based on traffic patterns and QoS requirements, the system achieves a balance between energy savings and response time.
2Loss of time
If DRX active time is extended to reduce latency, then response time is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by extending DRX active time only when necessary for specific services or traffic types that require low latency, while maintaining shorter active times for other traffic. This selective extension minimizes overall power consumption while providing low-latency response when needed.
3Use of energy by moving object
If DRX cycles are shortened to improve power efficiency, then energy savings increase, but data loss risk increases due to missed transmissions
Solution Approach 1:
The patent implements feedback mechanisms where the network monitors transmission success and DRX operation effectiveness, then adjusts DRX parameters accordingly. When data loss is detected or traffic patterns change, the system modifies active time duration or cycle length to prevent future data loss while maintaining energy efficiency.
Solution Approach 2:
The patent prepares for potential data loss by configuring buffer resources and implementing redundancy mechanisms that activate when DRX cycles are shortened. This cushioning approach allows aggressive power-saving DRX configurations while protecting against data loss through pre-configured safety nets.
Data Source
AI summary
The present disclosure provides a method implemented by a first terminal device. The method includes the step of transmitting, over a sidelink, to a second terminal device, a first message for controlling discontinuous reception (DRX) status of the second terminal device.The corresponding apparatus, system, device, computer-readable storage and carrier, etc. thereof are also provided.