PDU Session Resumption Control for Faster Wireless Connection Testing
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Solution Overview
Problem
Existing methods for testing communication functionalities of user equipment (UE) in industrial settings require data transfer to reestablish PDU sessions, causing network load and time delays, which complicates testing procedures and increases costs.
Innovation Solution
A method and system that allow the activation state of PDU sessions between a test network (TN) and UE to be tailored using a control device (CD) with a resuming signal, enabling automatic reactivation without data transfer, thus reducing time and network load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transfer is performed to reestablish PDU session, then the PDU session can be reestablished, but network load increases and testing complexity increases
Solution Approach 1:
The patent extracts the essential signaling messages (RRC Connection Resume Request and RRC Connection Resume) from the complete data transfer process. By utilizing the stored AS context and PDU session information, the system performs reestablishment using only these critical signaling exchanges, eliminating the need for full data transfer while maintaining session continuity.
Solution Approach 2:
The system performs preliminary actions by storing the AS context and PDU session information in the network infrastructure before the PDU session is actually released. This pre-stored information enables rapid reestablishment without requiring complete data transfer, as all necessary session parameters are already available in the network.
2Quantity of substance
If poll mode technique is used to reestablish PDU session, then no data transfer is required, but time delays increase due to polling frequency
Solution Approach 1:
The system dynamically adjusts the reestablishment approach based on the state of the RRC connection. When the RRC connection is released, it uses the stored AS context for rapid resumption. This dynamic adaptation allows the system to achieve fast reestablishment without being constrained by fixed polling intervals, effectively combining the benefits of both data transfer and poll mode techniques.
Solution Approach 2:
The stored AS context acts as an intermediary that bridges the gap between the UE and the network during reestablishment. This intermediate storage mechanism allows the UE to quickly resume the PDU session without requiring immediate network response or waiting for polling cycles, significantly reducing reestablishment time while avoiding full data transfer.
3Reliability
If data transfer occurs for PDU session reestablishment, then session continuity is maintained, but the native state of UE communication interfaces is affected
Solution Approach 1:
The patent extracts only the essential signaling messages needed for session resumption (RRC Connection Resume Request and RRC Connection Resume) while eliminating the need for actual data transfer. This extraction approach maintains session continuity through proper signaling while preventing the unwanted side effect of modifying the UE's communication interface state, as no substantive data exchange occurs.
Data Source
AI summary
A method is disclosed for tailoring an activation state of a protocol data unit session between a test network and at least one user equipment. A test system for testing a wireless connection between at least one user equipment and a test network is also provided. The user equipment is registered with the test network. The protocol data unit session is established between the test network and the user equipment. The protocol data unit session between the test network and the user equipment is resumed after at least one radio resource control connection of the protocol data unit session between the test network and the user equipment was released once a release condition was met. The resuming is based on a resuming signal provided by a control device coupled to the test network such that an activation state of the protocol data unit session is modifiable.