Semi-Persistent Scheduling Parameter Update Mechanism
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Solution Overview
Problem
Current wireless communications networks face challenges in efficiently supporting a wide range of devices with different data traffic profiles and requirements, particularly in terms of low latency and high reliability for services like Ultra Reliable Low Latency Communications (URLLC) and high data rate applications like enhanced Mobile Broadband (eMBB).
Innovation Solution
The method involves transmitting an activation message to a communications device to configure it to monitor periodic scheduling windows for downlink transmissions, followed by an update message that adjusts the parameters for these transmissions, and finally, a downlink transmission is sent according to the updated parameters during a scheduled window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional scheduling methods are used for downlink transmissions, then the network can maintain stable operations, but it cannot efficiently support diverse devices with different latency and reliability requirements
Solution Approach 1:
The patent implements dynamic parameter adjustment for semi-persistent scheduling by introducing update messages that can modify scheduling parameters (such as time domain resources, frequency domain resources, and modulation and coding schemes) without requiring full reconfiguration. This allows the system to adapt scheduling parameters in real-time based on varying traffic requirements of different devices and services, thereby achieving both high adaptability for diverse devices and high reliability for URLLC services.
2Adaptability or versatility
If frequent parameter updates are sent to support changing traffic requirements, then adaptability improves, but signaling overhead increases
Solution Approach 1:
The patent extracts only the necessary parameter update information from full scheduling configurations and transmits only these specific updates via update messages. Instead of sending complete reconfiguration messages, the system selectively updates individual parameters (such as time domain offset, frequency domain allocation, or MCS) that need adjustment, thereby reducing signaling overhead while maintaining the flexibility to adapt to changing traffic requirements.
3Productivity
If semi-persistent scheduling is used to reduce signaling overhead, then efficiency improves, but the ability to update parameters dynamically is limited
Solution Approach 1:
The patent applies preliminary action by establishing semi-persistent scheduling configurations in advance for efficient resource allocation, and then prepares update messages that can be quickly transmitted when parameter changes are needed. The system pre-configures the scheduling framework with all necessary parameter structures and update mechanisms, enabling rapid adaptation when traffic conditions change without requiring complex real-time negotiations or full reconfigurations.
Data Source
AI summary
Methods and apparatus for updating parameters for scheduled downlink transmissions. A method for an infrastructure equipment, includes transmitting, to a communications device, an activation message (e.g. an activation DCI), wherein the activation message configures the communications device to monitor a plurality of periodic scheduling windows (e.g. an plurality of SRS occasions) for downlink transmissions (e.g. a PDSCH), wherein the activation message indicates an initial set of parameters for the down-link transmissions (e.g. a transport block size). The method includes transmitting, to the communications device, an update message, wherein the update message indicates an updated set of parameters for one or more of the downlink transmissions and transmitting, to the communications device and during a scheduling window of the plurality of periodic scheduling windows, a downlink transmission according to the updated set of parameters.