Managing Multiple Semi-Persistent Scheduling Configurations

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Solution Overview

Problem

Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in managing multiple active semi-persistent scheduling configurations.

Innovation Solution

The implementation of user equipment (UE) and base station apparatuses that can receive and transmit radio resource control (RRC) messages to configure multiple Semi-Persistent Scheduling (SPS) physical downlink shared channel (PDSCH) configurations, along with a mechanism to detect and respond to downlink control information (DCI) formats for activation and deactivation of these configurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple SPS PDSCH configurations are implemented, then communication flexibility and efficiency are improved, but system complexity increases

Engineering Contradiction:

Improvecommunication flexibilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the SPS configuration management by introducing separate configuration indices (first SPS configuration index and second SPS configuration index) to identify different SPS PDSCH configurations. This allows the system to handle multiple configurations independently through structured segmentation of configuration parameters and release mechanisms.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The DCI format is designed with multi-functionality to handle both activation and release of SPS configurations. The same DCI structure can indicate activation of first SPS configuration, activation of second SPS configuration, or release of either configuration based on the value of the SPS configuration index field, reducing the need for separate control mechanisms.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If multiple SPS PDSCH configurations are implemented, then resource allocation efficiency is improved, but control signaling overhead increases

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidcontrol signaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent merges the activation and release control functions into a single DCI format structure. By combining multiple control operations (activation of first configuration, activation of second configuration, release of configurations) into one unified DCI format with a configurable SPS configuration index field, the system reduces the number of separate control messages needed.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system uses parameter changes in the DCI format, specifically the SPS configuration index field, to dynamically indicate different operations. By changing the value of this parameter (e.g., first value for first configuration, second value for second configuration), the system efficiently controls multiple SPS configurations without requiring separate dedicated signaling for each operation.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12238712B2Methods for multiple active semi-persistent scheduling configurations

Publication Date: 2025.02.25 SHARP KK

AI summary

A user equipment (UE) is described. The UE includes receiving circuitry configured to receive first downlink control information (DCI) used for indicating a deactivation of a configured grant corresponding to a configured grant configuration with a first index. The UE also includes transmitting circuitry configured to transmit, based on a reception of the first DCI, a configured grant confirmation medium access control (MAC) control element (CE). The configured grant confirmation MAC CE includes a value indicating a deactivation status of the configured grant configuration with the first index.