LADN Session State Signaling to Prevent Uplink Packet Drops
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Solution Overview
Problem
In local area data networks (LADN), when a user equipment (UE) departs from a specific area, the LADN session is released or deactivated, leading to unnecessary packet drops due to failed communication attempts upon reentry, as the UE fails to recognize the session status correctly.
Innovation Solution
An electronic device with two processors (first and second processors) communicates with a LADN, where the first processor receives a message indicating session deactivation and transmits a message to the second processor to prevent uplink packet generation, storing session information for reactivation upon reentry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the LADN session is deactivated when UE departs from the specific area, then radio resources are released and tunneling is released, but the UE application continues to generate uplink traffic causing unnecessary packet drops
Solution Approach 1:
The patent implements a feedback mechanism where the first processor monitors the LADN session status and sends notifications to the second processor. When the session is deactivated, the first processor receives the deactivation message and transmits a notification to the second processor, which then stops generating uplink packets. This feedback loop ensures that the application processor is aware of the session status and adjusts its behavior accordingly, preventing packet drops while maintaining resource efficiency.
Solution Approach 2:
The first processor acts as an intermediary between the LADN network and the second processor. It receives session status information from the LADN and translates it into appropriate control signals for the second processor. This intermediary role allows the system to maintain a clear separation between network management functions and application data generation, enabling reliable packet drop prevention through coordinated state management.
2Productivity
If the LADN session information is retained after deactivation, then communication can be quickly reestablished upon reentry, but the UE may attempt communication outside the service area causing packet drops
Solution Approach 1:
The patent divides session management into two distinct segments: the first processor handles network-level session state management (receiving deactivation messages, maintaining session context), while the second processor handles application-level data generation (stopping packet creation upon receiving deactivation notifications). This segmentation allows each processor to perform its specific function optimally - the first processor can retain session information for quick reestablishment, while the second processor can reliably stop packet generation to prevent drops, resolving the contradiction between fast reconnection and packet drop prevention.
3Adaptability or versatility
If the UE reenters the LADN service area, then the LADN session can be reactivated for communication, but without proper session status recognition, unnecessary communication attempts occur
Solution Approach 1:
The patent implements preliminary action by having the first processor maintain session context information even after deactivation. When the UE reenters the service area, the session can be quickly reactivated because the necessary information (IP address, protocol type, session parameters) is already retained in memory. This preliminary preservation of session state eliminates the need for complete session reconstruction, enabling fast reestablishment while the second processor's awareness of session status prevents inaccurate communication attempts.
Data Source
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AI summary
An electronic device is provided. The electronic device includes a first processor configured to perform wireless communication with a local area data network (LADN), and a second processor electrically connected with the first processor. The first processor is configured to receive a first message from the LADN indicating that a wireless communication session with the LADN is deactivated because the electronic device has departed from a geographic service area of the LADN, after receiving the first message, and transmit a second message to the second processor indicating that the wireless communication session is deactivated. The second processor is configured to terminate generation of a data packet for uplink transmission after receiving the second message.