Multi-PDSCH Grant Handling for Uplink Symbol Overlap

Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently handling conflicts between multi-physical downlink shared channel (PDSCH) grants and semi-static uplink symbols, leading to scheduling errors and inefficiencies in resource allocation.

Innovation Solution

Implementing techniques for UEs and base stations to handle conflicts by canceling, delaying, or adjusting the SLIV of PDSCH transmissions that overlap with semi-static uplink symbols, thereby resolving scheduling errors and enabling the use of multi-PDSCH grants to reduce overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If multi-PDSCH grants are used to schedule multiple PDSCH transmissions, then signaling overhead is reduced, but scheduling conflicts with semi-static uplink symbols occur leading to resource allocation errors

Engineering Contradiction:

Improvesignaling overheadVSAvoidscheduling accuracy

Core Design Contradiction:

Loss of informationVSReliability

Solution Approach 1:

The base station performs preliminary checks before granting multi-PDSCH transmissions to ensure that the scheduled PDSCH time resources do not conflict with semi-static uplink symbols. The UE similarly performs preliminary validation of received grants against its semi-static uplink configuration, identifying and reporting conflicts before transmission occurs, thereby preventing scheduling errors while maintaining the overhead-reducing benefits of multi-PDSCH grants

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where UEs report scheduling conflicts or errors related to multi-PDSCH grants and semi-static uplink symbol interactions back to the base station. This feedback enables the base station to adjust future grant configurations, refine collision handling procedures, and improve overall scheduling reliability while continuing to utilize multi-PDSCH grant structures for overhead reduction

Inventive Principle:

Principle #23Feedback

2Productivity

If PDSCH transmissions are scheduled without checking for uplink symbol conflicts, then resource allocation speed is increased, but scheduling errors occur due to symbol overlaps

Engineering Contradiction:

Improveresource allocation speedVSAvoidscheduling accuracy

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The base station performs preliminary checks before granting multi-PDSCH transmissions to ensure that the scheduled PDSCH time resources do not conflict with semi-static uplink symbols. The UE similarly performs preliminary validation of received grants against its semi-static uplink configuration, identifying and reporting conflicts before transmission occurs, thereby preventing scheduling errors while maintaining the overhead-reducing benefits of multi-PDSCH grants

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The UE autonomously validates received multi-PDSCH grants against its semi-static uplink symbol configuration and self-corrects or reports conflicts without requiring base station intervention for each individual check. This self-service approach maintains fast resource allocation while ensuring scheduling accuracy through UE-side conflict detection and reporting mechanisms

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP4272360B1Multi-physical downlink shared channel grant configuration

Publication Date: 2026.01.28 QUALCOMM INC

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AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a physical downlink shared channel (PDSCH) grant scheduling a set of PDSCH transmissions, wherein one or more PDSCH transmissions, of the set of PDSCH transmissions, are associated with a size and length indicator value (SLIV), and wherein at least one orthogonal frequency division multiplexing (OFDM) symbol overlaps with a semi-static uplink symbol. The UE may monitor for at least one PDSCH transmission, of the set of PDSCH transmissions, in accordance with the PDSCH grant. Numerous other aspects are described.