PDSCH Puncturing Indication for Overlapping Channel Decoding

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Solution Overview

Problem

Wireless communication systems face challenges in decoding overlapping physical downlink shared channel (PDSCH) communications, leading to decoding errors and increased latency due to uncertainty about whether one PDSCH is punctured in overlapping resources or both are transmitted simultaneously.

Innovation Solution

A method where user equipment (UE) receives an indication from the base station on whether a first PDSCH should be punctured or both PDSCH communications should be transmitted in overlapping resources, allowing the UE to decode the first PDSCH accurately and reduce latency in receiving the second PDSCH.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the UE receives overlapping PDSCH communications without puncturing indication, then resource utilization is improved, but decoding accuracy deteriorates due to uncertainty about resource usage

Engineering Contradiction:

Improveresource utilizationVSAvoiddecoding accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent introduces a puncturing indication message as an intermediary signal between the base station and UE. This indication explicitly告知s the UE whether the first PDSCH is punctured in overlapping resources, resolving the decoding uncertainty while maintaining efficient resource utilization. The indication acts as a mediator that coordinates the conflicting requirements of resource efficiency and decoding accuracy.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of information

If the UE attempts to decode overlapping PDSCH communications without puncturing indication, then communication overhead is reduced, but reliability deteriorates due to decoding errors

Engineering Contradiction:

Improvecommunication overheadVSAvoiddecoding reliability

Core Design Contradiction:

Loss of informationVSReliability

Solution Approach 1:

The patent applies preliminary action by sending the puncturing indication before the UE attempts to decode the overlapping PDSCH communications. This advance information allows the UE to prepare the correct decoding strategy (whether to expect puncturing or not), thereby ensuring reliable decoding without requiring additional retransmissions or error correction overhead.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If the UE waits for puncturing indication before decoding, then decoding accuracy is improved, but latency increases

Engineering Contradiction:

Improvedecoding accuracyVSAvoiddecoding latency

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The puncturing indication is provided in advance before the overlapping PDSCH transmissions occur, allowing the UE to prepare its decoding strategy beforehand. This preliminary information eliminates the need for waiting or iterative decoding attempts, thereby achieving high decoding accuracy without introducing additional latency.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11589348B2Reception of overlapping physical downlink shared channel communications

Publication Date: 2023.02.21 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a mobile station may receive an indication of whether a first physical downlink shared channel (PDSCH) communication is to be punctured in a set of resources in which a second PDSCH communication at least partially overlaps with the first PDSCH communication, or both the first PDSCH communication and the second PDSCH communication are to be transmitted in the set of resources. The mobile station may decode the first PDSCH communication based at least in part on the indication. Numerous other aspects are provided.