5G Network Architecture Integrating MBMS Capabilities
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Solution Overview
Problem
Current fifth generation (5G) network architectures lack multicast and broadcast multimedia subsystem (MBMS) capabilities, which are essential for applications like television broadcasting and public safety systems.
Innovation Solution
A network architecture is developed that integrates multicast and broadcast multimedia subsystem (MBMS) capabilities into 5G networks, utilizing a core network with functions such as authentication, security, and policy control, along with a broadcast-multicast service centre, to manage and secure MBMS transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MBMS capabilities are integrated into 5G network architecture, then service functionality and application support are improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The patent integrates MBMS capabilities into the 5G core network by making existing network functions multi-functional. The LMF, SMSF, and ACF are enhanced to perform both traditional 5G functions and MBMS-specific functions, allowing a single network element to serve multiple purposes and reducing the need for separate dedicated MBMS infrastructure
Solution Approach 2:
The patent combines MBMS control functions with existing 5G core network functions. Specifically, the LMF is merged with positioning capabilities, the SMSF integrates session management with MBMS bearer management, and the ACF combines access control with MBMS authorization, creating a unified architecture that reduces overall system complexity
2Reliability
If security functions are integrated into the core network, then transmission security is improved, but device complexity increases
Solution Approach 1:
The security function is integrated into the existing ACF within the 5G core network. The ACF performs both access control and security functions for MBMS transmissions, consolidating multiple functions into a single network element and reducing architectural complexity while maintaining security
Solution Approach 2:
The ACF acts as an intermediary between the BM-SC and the UE, handling security verification and authorization. It mediates security checks by verifying UE credentials and authorizing MBMS access, distributing the security burden across existing network elements rather than creating a separate security infrastructure
3Reliability
If MBMS transmissions are secured through core network functions, then transmission security is improved, but service setup time increases
Solution Approach 1:
Security credentials and authorization policies are pre-configured in the ACF and UE before MBMS transmission begins. The UE authenticates with the network in advance, and the ACF pre-verifies access rights, so that when MBMS transmission starts, security checks are already complete and can proceed efficiently
Solution Approach 2:
The ACF provides feedback to the BM-SC regarding UE authorization status and security verification results. This feedback mechanism allows the BM-SC to quickly determine whether to proceed with transmission to specific UEs, reducing setup time by avoiding unnecessary processing steps
Data Source
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AI summary
Examples of network architectures are provided. Some network architecture comprises a core network (CN) sub-architecture and a broadcast-multicast service-centre (BM-SC) sub-architecture. Some network architecture comprises a CN that implements functionality of the BM-SC. The architectures comprise network functions and interfaces between some of the network functions that allow for multicast broadcast multimedia system (MBMS) messaging and transmissions.