Sidelink Groupcast Streaming With Channel Feedback Adaptation

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Solution Overview

Problem

The quality of content delivery over sidelink channels in device-to-device communications is degraded due to varying radio channel conditions, leading to issues such as video stalls, buffering, fluctuating quality, and increased bandwidth and energy consumption, especially when multiple receiving devices are at different distances from the transmitting device.

Innovation Solution

Implementing systems and methods that enable actions based on feedback from receiving devices about sidelink channel conditions, including HARQ messages and location information, to adapt content transmission parameters, such as bitrate and location adjustments, and manage device connections to optimize user experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If content is transmitted at high bitrate to maintain quality, then content quality is improved, but bandwidth consumption and energy usage increase due to retransmissions

Engineering Contradiction:

Improvecontent delivery qualityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The system implements feedback mechanisms where receiving devices send channel condition information back to transmitting devices. This feedback enables dynamic adaptation of transmission parameters including bitrate selection and retransmission decisions, allowing the system to maintain content quality while reducing unnecessary retransmissions and energy consumption.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The transmission system dynamically adjusts content delivery parameters based on real-time channel conditions. Bitrate is adapted according to received signal strength and channel quality indicators, and retransmission behavior is modified based on feedback about channel stability, enabling the system to optimize between quality and energy efficiency as conditions change.

Inventive Principle:

Principle #15Dynamics

2Reliability

If retransmissions are performed to ensure content delivery, then reliability is improved, but bandwidth consumption increases

Engineering Contradiction:

Improvecontent delivery reliabilityVSAvoidbandwidth consumption

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

Feedback about channel conditions enables the system to make informed decisions about retransmissions. When channel conditions are poor, the system can proactively adjust bitrate or select more robust encoding, reducing the need for retransmissions. When conditions are good, higher bitrates can be used with fewer retransmissions required, optimizing bandwidth utilization.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary actions by selecting appropriate bitrate and encoding parameters before transmission based on initial channel assessments. This pre-adaptation reduces the likelihood of transmission failures and subsequent retransmissions, improving reliability while conserving bandwidth.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If content is transmitted to multiple devices simultaneously, then user experience is improved, but maintaining quality for all devices becomes difficult due to varying channel conditions

Engineering Contradiction:

Improvecontent sharing efficiencyVSAvoidcontent quality consistency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system applies local quality adaptation by transmitting different bitrate versions of content to different receiving devices based on their individual channel conditions. Each device receives content optimized for its specific radio environment, ensuring high quality for devices with good reception while maintaining acceptable quality for devices with poorer reception, all from the same transmitting device.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The transmitting device dynamically changes transmission parameters including bitrate, resolution, and encoding settings based on feedback from each receiving device about its channel conditions. This allows simultaneous optimization for multiple devices with varying requirements and reception qualities.

Inventive Principle:

Principle #35Parameter changes

4Loss of energy

If bitrate is reduced to conserve bandwidth, then energy consumption is reduced, but content quality deteriorates

Engineering Contradiction:

Improvebandwidth efficiencyVSAvoidcontent quality

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The system dynamically adjusts bitrate based on real-time channel conditions rather than using a fixed low bitrate. When channel conditions are excellent, higher bitrates are used to maximize quality without excessive bandwidth consumption. When conditions are poor, lower bitrates are used to ensure reliable delivery, optimizing the balance between quality and bandwidth efficiency adaptively.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12470896B2Systems and methods for improving groupcast media streaming using metric information in device-to-device communications

Publication Date: 2025.11.11 ADEIA GUIDES INC

AI summary

Systems and methods are provided for improving communications between computing devices. A content item is received at a first computing device, and a sidelink channel is initiated between the first computing device and a second computing device. A first portion of the content item is transmitted from the first computing device to the second computing device via the sidelink channel. Feedback is generated, based on a condition of the sidelink channel, at the second computing device, and the feedback is transmitted from the second computing device to the first computing device. An action to perform is identified based on the feedback, and the action is performed.