5G MBS Service Operations for Broadcast Context Management

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Solution Overview

Problem

Existing 5G MBS architectures lack specified service-based interfaces for multicast and broadcast communication, particularly in managing MBS sessions, session activation/deactivation, and session updates, and do not optimize MB-SMF services for multicast communication.

Innovation Solution

Introduce new AMF and MB-SMF service operations to manage MBS broadcasting contexts, including Namf_MBSBroadcast_ContextCreate, Namf_MBSBroadcast_ContextUpdate, and Namf_MBSBroadcast_ContextDelete for broadcast communication, and optimize MB-SMF services with Nmbsmf_MBSSession_UpdateContext and Nmbsmf_MBSSession_ContextStatusSubscribe/Notify for multicast communication, enabling efficient management of MBS sessions and context status updates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing 5G MBS architecture is used without new service operations, then the system maintains simplicity, but multicast and broadcast service management is incomplete and inefficient

Engineering Contradiction:

ImproveMBS session management capabilityVSAvoidService interface complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments MBS management into distinct service operations: Namf_MBSBroadcast_ContextCreate for broadcast context management, Namf_MBSBroadcast_ContextUpdate for updates, and Namf_MBSBroadcast_ContextDelete for cleanup. This segmentation allows targeted enhancement of broadcast capabilities without unnecessarily complicating the entire system architecture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces preliminary service operations that prepare and manage MBS contexts before actual data transmission. The Namf_MBSBroadcast_ContextCreate operation establishes broadcast contexts in advance, enabling efficient session management and reducing latency during actual MBS delivery.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If new service operations are introduced for MBS management, then service management efficiency is improved, but system complexity increases

Engineering Contradiction:

ImproveMBS session management efficiencyVSAvoidService operation complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent designs universal service operations that handle multiple MBS scenarios through a unified interface. The Namf_MBSBroadcast_ContextUpdate operation, for example, can handle both initial context setup and subsequent modifications, reducing the need for separate specialized operations and improving management efficiency while controlling complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements feedback mechanisms where the AMF notifies MB-SMF of context status changes through Namf_MBSBroadcast_ContextStatusNotify. This feedback loop enables efficient session management by automatically updating network functions about MBS context states, improving productivity without requiring complex manual management procedures.

Inventive Principle:

Principle #23Feedback

3Loss of information

If MB-SMF services are optimized with new operations, then information flow is simplified, but implementation complexity increases

Engineering Contradiction:

ImproveInformation flow efficiencyVSAvoidService implementation complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent extracts broadcast-specific context management functions from the general MBS framework into dedicated service operations. By separating Namf_MBSBroadcast_ContextCreate and Namf_MBSBroadcast_ContextDelete from generic session management, the patent simplifies information flow for broadcast scenarios while isolating implementation complexity into manageable, specialized components.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces the AMF as an intermediary that manages MBS broadcast contexts and coordinates between UE and MB-SMF. The AMF's service operations act as mediators that simplify information exchange by handling context creation, updates, and status notifications, reducing direct communication complexity between other network functions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250338090A1New Service and Service Operations for 5MBS

Publication Date: 2025.10.30 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

The present disclosure generally relates to wireless or mobile communication. More particularly, the present disclosure relates to a method for providing Multicast and Broadcast Service (MBS). The present disclosure also relates to apparatus and computer program product adapted for the same purpose. According to one embodiment of the present disclosure, a method for providing Multicast and Broadcast Service (MBS) is characterized in comprising: at a Multicast and Broadcast-Session Management Function (MB-SMF) node, generating a request for managing MBS broadcast contexts at one or more Access and Mobility Management Function (AMF) nodes involved in an MBS session; and sending the request from the MB-SMF node to the AMF nodes.