Downlink NAS Transport Message Handling for Concurrent Payloads
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Solution Overview
Problem
The implementation of transporting multiple payloads in the downlink direction using NAS transport procedures is challenging due to incompatible combinations of payload container IEs, which can lead to unwanted halting of requested actions, such as positioning actions.
Innovation Solution
The proposed solution involves handling downlink NAS transport messages with multiple payloads by postponing re-registration until the completion of actions related to non-UPU payload containers, thereby avoiding the halting of other processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If re-registration is performed immediately upon receiving UPU transparent container with REG flag set to true, then the registration update is processed promptly, but other concurrent actions (e.g., positioning actions) are halted
Solution Approach 1:
The patent introduces a preliminary check mechanism that examines the container list before executing re-registration. This preliminary action identifies whether other actions are pending, and if so, delays re-registration until those actions complete. This resolves the contradiction by performing a preliminary verification step that prevents premature re-registration from interrupting concurrent operations.
Solution Approach 2:
The patent implements a feedback mechanism where the system continuously monitors the execution status of actions associated with payload containers. When the REG flag is set, the system checks feedback from other pending actions before proceeding with re-registration. This feedback loop ensures re-registration only occurs when it will not disrupt other operations, balancing speed with reliability.
2Productivity
If multiple payload containers are transported in a single DL NAS transport message, then communication efficiency is improved, but compatibility issues between different container types may cause action halting
Solution Approach 1:
The patent introduces an intermediary mechanism (the action status monitoring system) that mediates between multiple payload containers and the re-registration process. This intermediary tracks the execution state of each container's associated actions and coordinates their completion, ensuring that re-registration does not interrupt pending operations. This mediator enables efficient multi-container transport while maintaining execution reliability.
Solution Approach 2:
The patent makes the re-registration execution dynamic by conditionally delaying it based on the real-time status of other actions. Instead of a fixed immediate execution policy, the system adaptively adjusts the timing of re-registration based on whether other payload actions are still pending. This dynamic approach allows efficient batch transport while ensuring reliable completion of all actions.
Data Source
AI summary
According to an aspect, there is provided an apparatus configured to perform the following. The apparatus receive a downlink, DL, non-access stratum, NAS, transport message comprising a plurality of payload containers. The plurality of payload containers comprise a user equipment parameters update, UPU, transparent container and one or more non-UPU payload containers. The UPU transparent container comprises a re-registration, REG, flag having a true value indicating that re-registration of the apparatus is requested. The apparatus sends the plurality of payload containers to respective upper layers for processing. The apparatus triggers the re-registration following detection of completion of the one or more respective processes associated with the one or more non-UPU payload containers.