PDU Session Management for Signaling Overhead Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G communication systems, managing PDU sessions for IoT applications leads to increased signaling overhead, which hampers efficient data transmission and resource management between mobile communication devices and the network.
Innovation Solution
Implementing a method where the Session Management Function (SMF) identifies whether a PDU session supports UP optimization, and if so, transmits a message to the Access and Mobility Management Function (AMF) to deactivate the downlink user plane connection while maintaining the uplink connection, thereby reducing signaling and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the SMF deactivates the entire PDU session connection, then signaling overhead is reduced, but uplink data transmission capability is lost
Solution Approach 1:
The patent segments the PDU session connection into separate downlink and uplink connections. The SMF can selectively deactivate the downlink connection while keeping the uplink connection active, allowing independent management of each direction's resources and capabilities.
Solution Approach 2:
The patent applies different states to different parts of the connection - the downlink connection is deactivated to save signaling overhead, while the uplink connection remains active to maintain data transmission capability. This local differentiation optimizes each direction according to its specific requirements.
2Productivity
If the SMF maintains both uplink and downlink connections active, then data transmission capability is preserved, but signaling overhead increases
Solution Approach 1:
The patent implements dynamic connection management where the SMF can adjust the state of downlink and uplink connections based on current network conditions and traffic requirements. The connection state is not fixed but can be modified to optimize performance and reduce signaling overhead as needed.
Solution Approach 2:
The patent changes the connection state parameter selectively - deactivating the downlink connection while maintaining the uplink connection in an active state. This parameter differentiation allows the system to reduce signaling overhead for downlink while preserving uplink data transmission capabilities.
3Loss of energy
If the SMF deactivates downlink connection only, then signaling overhead is reduced and uplink capability is preserved, but connection state complexity increases
Solution Approach 1:
The patent manages connection states by segmenting the PDU session into separate downlink and uplink connections, each with its own state. This segmentation simplifies state management compared to managing a single combined connection, as each segment can be independently controlled and tracked.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention provides a method of a SMF entity in a wireless communication system. The method comprises identifying whether to deactivate an UP connection of a first PDU session of one or more established PDU sessions, identifying whether the first PDU session supports an UP optimization based on the identification, and transmitting, to an AMF entity, a first message for deactivating the UP connection.