5G Multicast Broadcast Service Session Tree Establishment
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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 efficiently is challenging due to the separation of control and user planes.
Innovation Solution
A communication method and apparatus are provided to establish a user plane MBS session transmission tree by transmitting requests between control plane nodes and user plane nodes, allocating IP multicast addresses and C-TEIDs, and managing the joining of user plane nodes to multicast transmission groups to improve data transmission efficiency.
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 and scalability are improved, but the complexity of establishing user plane MBS session transmission trees increases
Solution Approach 1:
The patent segments the session establishment process into distinct phases: control plane nodes first establish control plane MBS sessions and allocate resources, then user plane nodes establish user plane MBS sessions using the allocated resources. This segmentation allows independent optimization of control and user planes while reducing overall establishment complexity.
Solution Approach 2:
Control plane nodes perform preliminary actions by allocating MBS session resources, generating MBS session templates, and distributing them to user plane nodes before user plane session establishment. This preliminary resource allocation simplifies the subsequent user plane session establishment process by pre-defining necessary parameters and relationships.
2Productivity
If multiple user plane nodes are established in the transmission tree, then data transmission capacity is improved, but the difficulty of managing and coordinating these nodes increases
Solution Approach 1:
Multiple user plane nodes are merged into a coordinated transmission tree structure where they share common control plane management and follow unified session establishment procedures. The control plane node coordinates all user plane nodes through standardized interfaces and protocols, enabling scalable management despite increasing node count.
Solution Approach 2:
Control plane nodes serve as intermediaries between the network management system and multiple user plane nodes. They translate high-level service requirements into specific user plane session parameters, manage resource allocation across multiple nodes, and coordinate their operations, thereby simplifying the management complexity.
3Productivity
If IP multicast addresses and C-TEIDs are allocated for each user plane node, then data transmission efficiency is improved, but the overhead of address and identifier management increases
Solution Approach 1:
The patent changes the parameter allocation strategy by having control plane nodes generate and allocate MBS session templates containing IP multicast addresses and C-TEIDs before user plane session establishment. This parameter pre-allocation reduces real-time signaling overhead and enables efficient data transmission without repeated address negotiations.
Solution Approach 2:
MBS session templates containing IP multicast addresses and C-TEIDs are copied from control plane nodes to multiple user plane nodes. This copying mechanism enables consistent parameter distribution across the transmission tree without requiring individualized allocation for each node, reducing management overhead while maintaining transmission efficiency.
Data Source
AI summary
A communication method and apparatus for a multicast broadcast service, a computer-readable storage medium, and an electronic device. The method includes: transmitting a first user plane multicast broadcast service (MBS) session establishment request to a first user plane node corresponding to an ith level control plane node, and receiving a first user plane MBS session establishment response fed back by the first user plane node, i=1, . . . , N; transmitting a second user plane MBS session establishment request to a second user plane node, and receiving a second user plane MBS session establishment response fed back by the second user plane node; and transmitting a first MBS session start request to a son control plane node of the ith level control plane node.