Dedicated PDU Session Establishment via Route Selection Descriptor Indicator
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Solution Overview
Problem
In 5G systems, existing protocols struggle to efficiently manage and differentiate user data traffic with the same characteristics, leading to issues such as shared PDU sessions for different applications, which can compromise security and user experience.
Innovation Solution
A method and apparatus that allow user equipment (UE) to determine, based on a route selection descriptor (RSD) associated with a specific traffic descriptor (TD), whether to establish a dedicated PDU session for user data traffic, enabling separate PDU sessions for traffic with distinct characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a shared PDU session is used for multiple applications with the same traffic characteristics, then resource utilization is improved, but security and service differentiation are compromised
Solution Approach 1:
The patent segments the PDU session management by introducing a dedicated PDU session indicator in the route selection descriptor (RSD). This allows the system to divide traffic handling into two paths: shared PDU sessions for general traffic and dedicated PDU sessions for specific applications requiring enhanced security or service differentiation. The segmentation is achieved through the URSP (UE Route Selection Policy) rules that evaluate traffic descriptors and RSDs to determine the appropriate session type.
2Reliability
If a dedicated PDU session is established for each application, then security and service quality are improved, but system complexity and overhead increase
Solution Approach 1:
The patent implements dynamic PDU session selection through the URSP mechanism. The system dynamically evaluates traffic descriptors (TD) and route selection descriptors (RSD) for each data flow, determining whether to use an existing shared PDU session or establish a new dedicated PDU session based on the dedicated PDU session indicator. This dynamic approach allows the system to adapt to different traffic requirements without maintaining permanently separate sessions for all applications, thereby reducing overall system complexity while preserving security where needed.
3Adaptability or versatility
If traffic classification is enhanced to support dedicated PDU sessions, then service differentiation is improved, but processing overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring URSP rules in the UE that contain traffic descriptors (TD) and route selection descriptors (RSD) with dedicated PDU session indicators. When traffic flows are generated, the UE immediately evaluates them against the pre-configured URSP rules to determine the appropriate PDU session type. This preliminary configuration eliminates the need for complex real-time analysis of traffic characteristics, significantly reducing processing overhead while maintaining fine-grained service differentiation capabilities.
Data Source
AI summary
Provided are a method and a device for supporting generation of a dedicated protocol data unit (PDU) session for particular user traffic. A user equipment (UE) operating in a wireless communication system determines whether to establish a dedicated protocol data unit (PDU) session exclusively used for traffic matched to a particular traffic descriptor (TD), on the basis that a route selection descriptor (RSD) associated with the particular TD includes an indicator indicating whether to establish the dedicated PDU session. The UE requests a network to establish the dedicated PDU session on the basis of the determination of dedicated PDU session establishment.