SMF Multicast Join Management for Relay and Remote UEs
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Solution Overview
Problem
Existing technologies do not effectively manage join requests and leave requests for multicast groups in relay UEs and remote UEs, which are crucial for efficient network connection services in 5G networks.
Innovation Solution
The SMF manages relay UEs and remote UEs for multicast services, facilitating the transmission of multicast contexts to base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multicast service is provided to relay UE and remote UE separately, then service coverage is expanded, but management complexity of join requests and leave requests increases
Solution Approach 1:
The patent combines the management of relay UE and remote UE into a unified multicast service management framework. The SMF receives and processes join requests and leave requests from both relay UE and remote UE through a single integrated interface, eliminating the need for separate management procedures and reducing overall system complexity while maintaining expanded service coverage.
Solution Approach 2:
The SMF is designed with universal functionality to handle multicast service management for both relay UE and remote UE. The same SMF instance can manage multiple types of UEs simultaneously, processing join and leave requests through standardized procedures that work across different UE types, thereby simplifying the system architecture.
2Device complexity
If integrated management of relay UE and remote UE is implemented, then system structure is simplified, but compatibility with existing multicast protocols may be compromised
Solution Approach 1:
The SMF acts as an intermediary between the unified management system and existing multicast protocols. It translates integrated management decisions into protocol-compliant messages, ensuring that the simplified system structure maintains full compatibility with standard multicast protocols such as MBMS and IGMP by mediating between the abstracted management layer and the concrete protocol layer.
Data Source
AI summary
One disclosure of the present specification provides a method by which a Session Management Function (SMF) provides a multicast service. The SMF performs the steps of: receiving a first message from a relay user equipment (UE), wherein on the basis of the relay UE receiving a join request of a first remote UE for a multicast group from the first remote UE, the first message includes (i) the join request of the first remote UE and (ii) information about the first remote UE, and on the basis of the relay UE wanting to join the multicast group by itself, the first message includes a join request of the relay UE; checking whether the join request included in the first message is a first join request for the multicast group from among the relay UE and one or more remote UEs receiving a network connection service from the relay UE.