Sidelink Resource Selection Aligned With Peer DRX Reception States

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Solution Overview

Problem

Existing resource selection mechanisms for sidelink communication in wireless networks fail to efficiently handle scenarios where devices switch between active and inactive reception states, leading to increased collision probabilities and missed transmissions due to mismatched resource selection and DRX operation.

Innovation Solution

A method for controlling device-to-device communication that involves determining candidate radio resources based on the active reception state of the receiving device and monitoring resource occupation status to select optimal transmission resources, adapting to switching between active and inactive states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If devices use DRX operations to switch between active and inactive reception states for power saving, then energy consumption is reduced, but collision probability increases and transmission reliability deteriorates

Engineering Contradiction:

Improveenergy consumptionVSAvoidtransmission reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The transmitting device performs preliminary actions by determining the DRX configuration of the receiving device and predicting its active reception states before transmission. This allows the transmitter to proactively select resources that coincide with the receiver's active states, preventing collisions and ensuring reliable delivery while the receiver maintains its power-saving DRX operations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention utilizes feedback mechanisms where the receiving device provides information about its DRX configuration to the transmitting device. This feedback enables the transmitter to adapt its resource selection strategy to match the receiver's active reception states, resolving the contradiction between power saving and transmission reliability.

Inventive Principle:

Principle #23Feedback

2Device complexity

If devices autonomously select radio resources without considering peer DRX states, then device complexity is reduced, but collision probability increases

Engineering Contradiction:

Improvedevice complexityVSAvoidcollision probability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The transmitting device performs preliminary determination of the receiving device's DRX configuration and active states before resource selection. This preliminary action enables informed resource selection that avoids collisions with the receiver's inactive periods, improving reliability without requiring complex real-time coordination or changing the fundamental autonomous selection mechanism.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12635032B2Consideration of active reception status in resource selection for D2D communication

Publication Date: 2026.05.19 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A wireless communication device (10) determines that a further wireless communication device (10) is configured to switch between an inactive reception state and an active reception state. Based on when the further wireless communication device (10) will be in the active reception state, the wireless communication device (10) determines a candidate set of radio resources. From the candidate set of radio resources, the wireless communication device (10) selects at least one radio resource for a D2D transmission from the wireless communication device (10) to the further wireless communication device (10).