NR MBS SPS Configuration for Reliable Transmission

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The challenge of improving the reliability of Multicast Broadcast Service (MBS) transmission in the RRC connected state within the New Radio (NR) system using Semi-Persistent Scheduling (SPS) has not been adequately addressed.

Innovation Solution

A semi-persistent scheduling method and apparatus are introduced, where a network device configures SPS configurations for MBS services through RRC signaling, activates or deactivates these configurations using DCI, and manages PUCCH feedback resources to enhance reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If Semi-Persistent Scheduling (SPS) is used to transmit MBS services, then the reliability of MBS service transmission is improved, but the device complexity and signaling overhead increase

Engineering Contradiction:

ImproveMBS service transmission reliabilityVSAvoidSPS configuration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies universality by enabling the same SPS configuration mechanism to serve both unicast and multicast/broadcast services. The network device uses a unified SPS configuration approach for different service types, reducing the need for separate specialized mechanisms while maintaining reliability improvements for MBS services.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent segments the SPS configuration into distinct components: SPS-Config information for scheduling parameters, SPS-Release for resource release, and separate indication fields for unicast versus multicast/broadcast services. This segmentation allows the system to manage complexity by breaking down the overall SPS mechanism into manageable, independently controllable parts.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If multiple SPS configurations are provided for different services, then the adaptability and service differentiation are improved, but the signaling overhead and configuration complexity increase

Engineering Contradiction:

ImproveService differentiation capabilityVSAvoidSignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent merges the configuration of SPS parameters into a unified SPS-Config information structure that can accommodate both unicast and multicast/broadcast services. By combining related configuration elements and using a shared SPS configuration framework, the patent reduces redundant signaling while maintaining the ability to differentiate between service types through indication fields.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent applies local quality by introducing service-specific indication fields within the SPS configuration that allow differentiation between unicast and multicast/broadcast services only where necessary. The core SPS parameters remain shared, while only specific indication bits or fields are customized for different service types, minimizing overall signaling overhead.

Inventive Principle:

Principle #3Local quality

3Productivity

If SPS configurations are activated and deactivated dynamically using DCI, then the productivity and resource efficiency are improved, but the measurement precision and feedback requirements increase

Engineering Contradiction:

ImproveResource allocation efficiencyVSAvoidPUCCH feedback accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent implements periodic action through SPS (Semi-Persistent Scheduling) where resources are allocated periodically for MBS service transmission without requiring continuous DCI signaling. This periodic resource allocation improves productivity by reducing signaling overhead while maintaining efficient resource utilization. The periodic nature allows the system to achieve high resource efficiency without requiring precise continuous feedback for every transmission.

Inventive Principle:

Principle #19Periodic action

4Reliability

If PUCCH feedback resources are configured for SPS MBS services, then the reliability through feedback mechanisms is improved, but the device complexity and resource overhead increase

Engineering Contradiction:

ImproveFeedback mechanism reliabilityVSAvoidPUCCH resource management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the feedback requirement specifically for multicast/broadcast SPS services by introducing a separate indication field that can identify whether PUCCH feedback is needed. This extraction allows the system to selectively enable feedback mechanisms only when necessary for MBS services, rather than requiring feedback for all SPS transmissions, thereby reducing overall device complexity while maintaining reliability where needed.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4243528B1Semi-persistent scheduling methods and apparatuses for MBS service

Publication Date: 2025.10.29 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

Figure 1~2
Figure 3
Figure 4

AI summary

Provided is a semi-persistent scheduling (SPS) method and apparatus for an MBS service, and a terminal device and a network device. The method comprises: a terminal device receiving first configuration information sent by a network device, wherein the first configuration information is used for determining N SPS configurations, N is a positive integer, and all or some of the N SPS configurations are used for transmitting an MBS service.