Automatic Sidelink Resource Grant for Energy Saving

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Solution Overview

Problem

Wireless communication systems face challenges in reducing energy consumption, particularly when network entities are unable to enter energy-saving modes due to ongoing signals from user equipment, which limits network functionality and increases energy usage.

Innovation Solution

Implementing automatic sidelink resource grants by the network entity, allowing user equipment to retransmit failed communications without interfering with the network's energy-saving mode, thereby reducing energy consumption without impacting sidelink communication functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If user equipment requests additional sidelink resources for retransmission after NACK, then retransmission reliability is improved, but network entity energy consumption increases and energy-saving mode cannot be activated

Engineering Contradiction:

Improvesidelink communication retransmission reliabilityVSAvoidnetwork entity energy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The network entity pre-configures multiple sidelink resources including retransmission resources in the initial DCI grant, so that when NACK is received, the UE can immediately use the pre-allocated retransmission resource without requiring additional network intervention, enabling the network to enter energy-saving mode

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The UE autonomously uses the pre-configured retransmission resources upon receiving NACK without needing to request additional resources from the network, making the retransmission process self-service and eliminating the need for network entity intervention

Inventive Principle:

Principle #25Self-service

2Use of energy by moving object

If network entity enters energy-saving mode frequently, then energy consumption is reduced, but sidelink retransmission functionality may be impacted

Engineering Contradiction:

Improvenetwork entity energy consumptionVSAvoidsidelink communication functionality

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The network entity configures multiple sidelink resources including retransmission resources in advance before entering energy-saving mode, ensuring that retransmission functionality is maintained even when the network is in energy-saving mode

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses NACK feedback from the receiving UE to trigger autonomous retransmission using pre-configured resources, ensuring reliable communication while allowing the network to operate in energy-saving mode

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20240237099A1Automatic sidelink resource grant

Publication Date: 2024.07.11 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive downlink control information (DCI) from a network entity, wherein the DCI indicates multiple sidelink resources including a first sidelink resource and a second sidelink resource, wherein the first sidelink resource is for transmission of a sidelink communication to a second UE and wherein the second sidelink resource is for retransmission of the sidelink communication after a negative acknowledgment (NACK) of the sidelink communication on the first sidelink resource. The UE may transmit the sidelink communication to the second UE on at least one of the multiple sidelink resources. Numerous other aspects are described.