5G MBS Session Tree Setup Using Intermediate User Plane Nodes
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Solution Overview
Problem
In 5G multicast broadcast service (MBS) systems where the control plane is separated from the user plane, establishing a user plane MBS session transmission tree faces numerous challenges, leading to inefficient data transmission.
Innovation Solution
An intermediate session management function (I-SMF) is introduced to manage the establishment of user plane MBS sessions by selecting intermediate user plane nodes and allocating multicast transmission addresses, enabling efficient data transmission through multicast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control plane and user plane are separated in 5G MBS systems, then system architecture flexibility is improved, but establishment complexity of user plane MBS session transmission tree increases
Solution Approach 1:
The patent introduces an intermediate user plane node as a mediator between the control plane node and son user plane nodes. This intermediate node receives MBS data from the control plane node and distributes it to multiple son user plane nodes, simplifying the establishment process of the transmission tree while maintaining the separated control-plane-user-plane architecture.
Solution Approach 2:
The patent segments the user plane transmission tree into hierarchical levels: control plane node, intermediate user plane node, and son user plane nodes. This segmentation allows independent management and establishment of each segment, reducing overall complexity while preserving architectural flexibility.
2Device complexity
If traditional unicast transmission is used for MBS data, then transmission path simplicity is maintained, but transmission efficiency deteriorates
Solution Approach 1:
The patent merges multiple unicast transmission paths into a single multicast transmission path. The control plane node transmits MBS data once to the intermediate user plane node, which then distributes to multiple son user plane nodes using IP multicast, significantly improving transmission efficiency while maintaining reasonable path complexity.
Solution Approach 2:
Instead of creating multiple separate transmission paths (copies) from the control plane node to each son node, the patent uses IP multicast to create a single efficient copy mechanism where data is replicated at the intermediate user plane node, improving efficiency without complicating the overall transmission path structure.
Data Source
AI summary
Embodiments of this disclosure provide methods, apparatuses, non-transitory computer-readable storage medium, and electronic devices for a multicast broadcast service. A method includes: receiving a first multicast broadcast service (MBS) session start request, selecting an intermediate user plane node, transmitting a first user plane MBS session establishment request to the intermediate user plane node, receiving a first user plane MBS session establishment response fed back by the intermediate user plane node and transmitting a second MBS session start request to a son control plane node to instruct the son control plane node to allocate son user plane nodes to the intermediate user plane node.