PDSCH Discarding Rate Feedback for Adaptive Downlink Transmission

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Wireless communication systems face inefficiencies due to ACK and NACK errors in PDSCH communications, leading to unnecessary network congestion and increased energy consumption as the network node continues to transmit redundant data, unaware of the UE's discarding of received data.

Innovation Solution

A UE determines a discarding rate for PDSCH communications exceeding thresholds and transmits a discarding rate report to the network node, enabling the network node to adjust communication parameters such as modulation and coding schemes, transmission power, or resource allocation to improve communication efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the network node continues to transmit data to the UE without knowing about discarding, then the UE can maintain simple reception operations, but network congestion increases and energy consumption rises due to redundant transmissions

Engineering Contradiction:

ImproveUE reception operation simplicityVSAvoidnetwork energy consumption

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The patent implements a feedback mechanism where the UE monitors its PDSCH discarding rate and reports this information back to the network node. This feedback loop enables the network to adjust its transmission strategy based on actual UE reception status, reducing redundant transmissions and energy consumption while maintaining simple UE reception operations.

Inventive Principle:

Principle #23Feedback

2Duration of action of stationary object

If the network node transmits redundant data without awareness of UE discarding, then transmission continuity is maintained, but network congestion increases

Engineering Contradiction:

Improvetransmission continuityVSAvoidnetwork congestion

Core Design Contradiction:

Duration of action of stationary objectVSQuantity of substance

Solution Approach 1:

The feedback mechanism allows the network node to receive discarding rate information from the UE and adjust transmission parameters accordingly. This reduces the quantity of redundant data transmitted while maintaining transmission continuity through adaptive retransmission strategies.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The network node changes transmission parameters such as modulation and coding schemes, transmission power, or resource allocation based on the reported discarding rate, optimizing the balance between transmission continuity and network congestion reduction.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If the UE reports discarding rate information, then communication efficiency improves, but signaling overhead increases

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidsignaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent implements targeted feedback where the UE reports discarding rate information only when it exceeds a configured threshold, rather than continuously reporting. This approach improves communication efficiency by providing actionable information to the network while minimizing unnecessary signaling overhead.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Instead of continuous reporting, the system uses partial reporting by only transmitting discarding rate information when it becomes significant (exceeds threshold), reducing signaling overhead while maintaining sufficient information for network optimization.

Inventive Principle:

Principle #16Partial or excessive action

4Productivity

If the network node adjusts transmission parameters based on discarding rate, then data transmission efficiency improves, but system complexity increases

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The feedback mechanism provides the network node with discarding rate information that triggers parameter adjustments. This feedback-driven approach improves data transmission efficiency while managing system complexity by only adjusting parameters when necessary, rather than implementing continuous complex control algorithms.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system adjusts transmission parameters (modulation and coding schemes, transmission power, resource allocation) based on discarding rate thresholds, improving efficiency through targeted parameter changes rather than continuous complex optimization, thus managing system complexity.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250365728A1Techniques for reporting physical downlink shared channel discarding rate

Publication Date: 2025.11.27 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that a discarding rate associated with physical downlink shared channel (PDSCH) communications exceeds one or more discarding rate thresholds. The UE may transmit, to a network node, a discarding rate report indicating the discarding rate. Numerous other aspects are described.