Device-to-Device Resource Cancellation for Power-Saving Data Reception
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Solution Overview
Problem
Existing device-to-device communication technologies require devices to remain in a listen state on agreed-upon resource blocks even when inactive, leading to increased power consumption, particularly in bursty traffic scenarios.
Innovation Solution
Devices can independently determine and dynamically cancel resource blocks based on inactivity, allowing them to enter a power-save mode, reducing unnecessary listening and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices remain in listen state on agreed-upon resource blocks during inactive periods, then communication reliability is maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic resource block cancellation where devices can dynamically adjust their listening behavior based on traffic conditions. The follower device cancels resource blocks during inactive periods while the master device continues transmitting, creating an asymmetric dynamic state that reduces power consumption while maintaining communication reliability when needed.
Solution Approach 2:
The follower device autonomously determines when to cancel resource blocks based on its own inactivity detection, without requiring continuous coordination with the master device. This self-service mechanism allows the follower to independently enter power-save mode while still enabling reliable communication resumption when traffic arrives.
2Use of energy by moving object
If devices dynamically cancel resource blocks during inactivity, then power consumption is reduced, but communication responsiveness may deteriorate
Solution Approach 1:
The patent employs feedback mechanisms where the master device monitors for traffic and can trigger resource block restoration. When the master device detects incoming traffic or needs to communicate, it can signal the follower to restore the resource blocks, ensuring responsive communication recovery while maintaining power savings during idle periods.
Solution Approach 2:
The system establishes resource block cancellation and restoration protocols in advance, allowing devices to quickly transition between power-save and active states. The master device maintains the ability to immediately restore resource blocks when needed, providing preliminary preparation for rapid communication resumption without sacrificing power efficiency during inactivity.
Data Source
AI summary
The first device establishes a data path with the second device, agrees on a set of resource blocks with the second device for communication on the data path. The first device transmits, to the second device, a message indicating when the first device cancels a portion of the set of resource blocks so that the second device is refrained from transmitting data to the first device during canceled portion of the set of resource blocks on the data path. The first device cancels the portion of the set of resource blocks for receiving data on the data path. The first device is allowed not to listen on the data path during the cancelled portion of the set of resource blocks.