D2D DRX Configuration Switching for Power-Efficient Reception
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Solution Overview
Problem
Existing wireless communication networks lack efficient mechanisms for configuring Discontinuous Reception (DRX) in Device-to-Device (D2D) communication, which is complex due to the broadcast nature and distributed control in D2D transmissions, differing from traditional one-to-one DL/UL communication.
Innovation Solution
Implementing multiple DRX configurations simultaneously for D2D communication, including class-specific and common DRX configurations, to manage active and inactive times based on specific traffic classes and control transitions using timers and control messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple DRX configurations are implemented simultaneously for different D2D transmission modes, then energy efficiency and power savings are improved, but device complexity increases
Solution Approach 1:
The patent segments the DRX configuration into multiple independent configurations, each associated with a specific transmission mode (united, separate, or both). This allows the device to manage different D2D communication scenarios through distinct DRX parameters, enabling targeted power saving for each mode while maintaining overall system manageability through structured organization of configurations.
Solution Approach 2:
The patent introduces dynamic switching between different DRX configurations based on the active transmission mode. The device can transition between united DRX configuration and separate DRX configuration depending on whether unicast or broadcast transmissions are occurring, allowing adaptive power management that responds to changing communication conditions.
2Reliability
If DRX configurations are aligned among multiple UEs for D2D communication, then communication reliability is improved, but control complexity increases
Solution Approach 1:
The patent merges the DRX alignment mechanism with the existing network-controlled procedures for D2D communication. By utilizing the network's role in coordinating UEs, the alignment of DRX configurations across multiple devices is achieved through established control channels, reducing the need for complex peer-to-peer coordination while maintaining synchronization.
Solution Approach 2:
The patent incorporates feedback mechanisms where UEs report their DRX configuration status and reception capabilities to the network. This feedback loop enables the network to adjust DRX parameters to ensure proper alignment among UEs, maintaining communication reliability through continuous monitoring and adaptation.
3Reliability
If DRX active time is extended to ensure reliable reception processing, then communication reliability is improved, but energy consumption increases
Solution Approach 1:
The patent applies partial DRX action by configuring DRX active time to cover only the essential reception windows for D2D transmissions. Instead of maintaining continuous active state, the system uses calculated active periods that are sufficient for reliable reception based on transmission timing and DRX parameters, avoiding excessive energy consumption while ensuring adequate processing time.
Data Source
AI summary
A wireless communication device (10) simultaneously maintains a first DRX configuration for D2D communication and a second DRX configuration for D2D communication. Based on at least one of the first DRX configuration and the second DRX configuration, the wireless communication device (10) participates in D2D communication with one or more further wireless communication devices (10).