Intermediate Session Management Entity for 5G PDU Session Optimization
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Solution Overview
Problem
In 5G new radio networks, managing multiple user plane entities at different locations within a PDU session is complex, leading to increased management complexity and delays in data transmission.
Innovation Solution
A session management method that selects an intermediate session management entity based on UE location information and PDU session requirements, allowing it to manage only network elements within a specified area, reducing management complexity and data transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple user plane entities are managed across different locations in a PDU session, then network coverage and service availability are improved, but management complexity increases
Solution Approach 1:
The patent divides the session management function into multiple independent session management entities, each responsible for a specific geographic area or network region. This segmentation allows the system to manage multiple user plane entities distributed across different locations while reducing the management burden on each individual entity, as each only needs to manage entities within its designated scope.
Solution Approach 2:
The patent introduces intermediate session management entities that act as mediators between the core network and user plane entities located in different regions. These intermediate entities handle the complexity of managing distributed user plane entities by providing a standardized interface and abstraction layer, thereby reducing overall management complexity while maintaining service availability.
2Area of stationary object
If user plane entities are distributed far apart to serve different locations, then network coverage is improved, but data transmission delay increases
Solution Approach 1:
The patent implements local session management by deploying session management entities in different geographic regions, each capable of independently managing user plane entities in its local area. This allows data transmission to be handled locally without requiring long-distance communication with centralized management entities, thereby reducing transmission delay while maintaining extensive network coverage.
Solution Approach 2:
The patent transitions from a centralized session management architecture to a distributed hierarchical architecture, adding a spatial dimension to session management. By organizing session management entities in a hierarchical structure with regional intermediaries, the system can provide both wide coverage and low latency by routing traffic through the nearest available management entity.
3Device complexity
If an intermediate session management entity manages only network elements within a specified area, then management complexity is reduced, but coordination overhead increases
Solution Approach 1:
The patent designs intermediate session management entities with universal interfaces and standardized protocols that enable them to interact with multiple types of network elements and other session management entities using common procedures. This multi-functionality reduces coordination overhead by eliminating the need for specialized communication mechanisms between different types of entities, thereby maintaining reduced management complexity while facilitating efficient inter-entity coordination.
Data Source
AI summary
This application discloses a session management method, a network device, and a communications system. According to embodiments of the present invention, an intermediate session management entity is selected based on UE location information and PDU session requirement information. In this way, an intermediate session management entity near UE can provide a service for a PDU session, and a delay of data transmission is reduced. In addition, the intermediate session management entity selects a user plane entity based on the UE location information and the PDU requirement information, and the intermediate session management entity is responsible for managing user plane entities within a specified area, and does not need to manage user plane entities in the entire PDU session, thereby reducing management complexity.