Paging-Triggered SPS Resource Activation for Inactive-State MT-SDT

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing mobile terminated small data transmission (MT-SDT) in inactive states, particularly in activating semi-persistent scheduling (SPS) resources for downlink data reception.

Innovation Solution

The implementation of paging triggered semi-persistent scheduling (SPS) resource activation mechanisms for downlink data reception in inactive states, involving the transmission of paging downlink control information (DCI) and paging messages to activate SPS resources for data reception, enabling efficient MT-SDT.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the UE remains in inactive state to save energy, then energy consumption is reduced, but downlink data reception capability is limited

Engineering Contradiction:

Improveenergy consumptionVSAvoiddownlink data reception capability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The network node pre-configures SPS resources for the UE while it is in inactive state, so that when downlink data arrives, the resources are already prepared and activated via paging DCI, enabling immediate data reception without requiring the UE to transition to connected state

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The SPS resources are dynamically activated only when needed through paging DCI triggering, allowing the UE to maintain inactive state for energy saving while having the capability to immediately receive downlink data when activated, thus adapting between energy saving and data reception needs

Inventive Principle:

Principle #15Dynamics

2Productivity

If traditional scheduling methods are used for downlink data in inactive state, then data transmission can be achieved, but signaling overhead increases and efficiency decreases

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoidsignaling overhead

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

SPS resources provide periodic, pre-allocated time-frequency resources for downlink data reception, eliminating the need for dynamic scheduling signaling for each transmission, thus reducing signaling overhead and improving transmission efficiency

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent extracts the scheduling signaling overhead by pre-configuring resources and using compact paging DCI triggers instead of full dynamic scheduling procedures, removing unnecessary signaling steps while maintaining data transmission capability

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250294544A1Paging triggered semi-persistent scheduling resource activation for mobile terminated small data transmission

Publication Date: 2025.09.18 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, a configuration of a semi-persistent scheduling (SPS) resource for downlink data reception in an inactive state. The UE may receive, from the network node and while operating in the inactive state, paging downlink control information (DCI) and a paging message for triggering downlink data reception in the inactive state, wherein the paging DCI or the paging message includes an indication that activates the SPS resource for downlink data reception in the inactive state. The UE may receive, from the network node and while operating in the inactive state, one or more transmissions of downlink data via the SPS resource for downlink data reception in the inactive state. Numerous other aspects are described.