Multiplexed DCI in SPS PDSCH for Fewer UE Wake-Ups

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Solution Overview

Problem

User equipment (UE) in wireless communication systems operating in reduced-power modes frequently needs to wake up to receive downlink control and data communications, reducing energy-saving benefits due to frequent and prolonged wake-up periods.

Innovation Solution

Implementing semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) transmissions with downlink control information (DCI) multiplexed, allowing UE to monitor for DCI within SPS PDSCH transmissions and adjust transmission parameters dynamically.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If UE operates in reduced-power mode, then energy consumption is reduced, but the UE must frequently wake up to receive downlink control and data communications which increases energy consumption

Engineering Contradiction:

Improveenergy consumptionVSAvoidwake-up frequency

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent combines downlink control information (DCI) with semi-persistent scheduling (SPS) PDSCH transmissions by multiplexing them in the same time-frequency resources. This merging allows the UE to receive both control and data in a single wake-up event, reducing the frequency of wake-ups and thereby reducing energy consumption while minimizing time loss.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If UE wakes up frequently to receive downlink communications, then communication reliability is improved, but energy-saving benefits are reduced

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

By merging DCI and SPS PDSCH into a single multiplexed transmission, the UE can maintain communication reliability by receiving both control and data simultaneously during each wake-up event, while reducing the total number of wake-up events and thereby conserving energy.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If separate DCI and SPS PDSCH transmissions are used, then control and data can be transmitted independently, but network resources and computational overhead increase

Engineering Contradiction:

Improveindependent transmission controlVSAvoidcomputational overhead

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges separate DCI and SPS PDSCH transmissions into a single multiplexed structure, reducing network resource usage and computational overhead for processing separate control and data channels while maintaining the ability to independently control transmission parameters through the multiplexed DCI fields.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20260052541A1Downlink control information multiplexed with semi-persistent scheduling physical downlink shared channel transmissions

Publication Date: 2026.02.19 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to downlink control information (DCI) multiplexed with one or semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) transmissions. In some aspects, a user equipment (UE) may receive a DCI message that is multiplexed with an SPS PDSCH transmission of a series of SPS PDSCH transmissions. In some aspects, a DCI message that is multiplexed with an SPS PDSCH transmission may be used to dynamically adjust transmission parameters associated with one or more SPS PDSCH transmissions of the series of SPS PDSCH transmissions. In some other aspects, the DCI message that is multiplexed with the SPS PDSCH transmission may be used to dynamically schedule a dynamic grant PDSCH transmission.