Terminal Device PDU Session Establishment via URSP Rule Mapping
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Solution Overview
Problem
The existing technologies do not provide a clear method for a terminal to establish a Protocol Data Unit (PDU) session based on a User Equipment Route Selection Policy (URSP) in 5G mobile communications networks.
Innovation Solution
A data transmission method and apparatus for a terminal device that includes a mapping table and a routing table, where the terminal device establishes a PDU session with a network device using the modem module if no matching PDU session parameter exists, and routes data using the interface name of the established session, ensuring efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal device wants to establish a PDU session based on URSP rule parameters, then data transmission capability is improved, but the prior art lacks clear methodology causing implementation uncertainty
Solution Approach 1:
The patent performs preliminary actions by checking whether a matching PDU session already exists in the mapping table before establishing a new session. The terminal device checks the mapping table for existing PDU sessions that match the URSP rule parameters, and only establishes a new session if no match is found. This prevents redundant session establishment and ensures efficient resource utilization.
Solution Approach 2:
The patent segments the PDU session establishment process into distinct steps: (1) checking the mapping table for existing sessions, (2) determining whether to establish a new session based on match results, (3) establishing the new PDU session through the modem module if needed, and (4) updating the mapping table and routing table with the new session information. This segmentation makes the complex process manageable and implementable.
2Ease of operation
If the terminal device establishes a new PDU session for each application, then data transmission routing is improved, but system complexity increases due to session management
Solution Approach 1:
The patent merges multiple PDU session management functions into a unified mapping table that stores the correspondence between PDU session parameters and session identifiers. The routing table also stores the mapping between application identifiers and PDU session identifiers. This consolidation simplifies session management by providing centralized lookup mechanisms rather than scattered session information.
Solution Approach 2:
The mapping table and routing table automatically update themselves when new PDU sessions are established. When the terminal device establishes a new PDU session, it automatically adds the mapping relationship to the mapping table and updates the routing table with the new session information. This self-service mechanism reduces manual intervention and simplifies session management complexity.
Data Source
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AI summary
This application provides a data transmission method and apparatus, and a readable storage medium, applied in a terminal device that includes an application platform module and a modem module. The terminal device stores a mapping table and a routing table. The method includes: obtaining a URSP rule parameter of a started application; establishing a first PDU session corresponding to the started application with a network device through the modem module when no PDU session parameter matching the URSP rule parameter exist in the mapping table; adding an interface name of the first PDU session to the routing table; adding a mapping relationship between the session parameter of the first PDU session and the interface name of the first PDU session to the mapping table; and routing to-be-transmitted data of the started application to the first PDU session by using the interface name of the first PDU session. This technical solution implements data transmission and provides a solution of how the terminal device establishes a corresponding PDU session based on the obtained URSP rule parameter.