UE Traffic Steering Activation for RAN/WLAN Collision Avoidance
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Solution Overview
Problem
The integration of Rel-12 UE-based traffic steering and Rel-13 RAN/WLAN aggregation in wireless communication systems can lead to collisions, as UE-based traffic steering and network-controlled RAN/WLAN aggregation may conflict, resulting in inefficient network operation.
Innovation Solution
A method where a UE activates or deactivates UE-based traffic steering by transmitting WLAN offloading information to the network, allowing the network to manage the RAN/WLAN interworking state, thereby preventing collisions between UE-based traffic steering and RAN/WLAN aggregation, and includes receiving traffic steering activation or deactivation messages to adjust its steering accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UE-based traffic steering is activated, then traffic management flexibility is improved, but collision with network-controlled RAN/WLAN aggregation occurs
Solution Approach 1:
The patent implements dynamic control of UE-based traffic steering by introducing activation and deactivation mechanisms. The network can dynamically switch between UE-based traffic steering and RAN/WLAN aggregation modes based on current network conditions, ensuring that only one mechanism is active at a time to prevent collisions while maintaining flexibility when appropriate
Solution Approach 2:
The patent introduces an intermediary control mechanism where the network sends activation/deactivation commands to UE-based traffic steering. This intermediary layer mediates between the UE's autonomous traffic steering capability and the network's controlled RAN/WLAN aggregation, preventing direct conflict between the two mechanisms
2Reliability
If network controls RAN/WLAN aggregation, then network operation stability is improved, but traffic management flexibility is reduced
Solution Approach 1:
The system dynamically switches between network-controlled RAN/WLAN aggregation and UE-based traffic steering modes. The network can activate or deactivate UE-based traffic steering based on current conditions, allowing the system to transition from stable network-controlled operation to flexible UE-based operation when needed
Solution Approach 2:
The patent changes the control parameter state by introducing activation/deactivation flags for UE-based traffic steering. When deactivated, the system operates in stable network-controlled mode; when activated, it transitions to flexible UE-based mode, allowing parameter-driven adaptation between the two operational states
3Speed
If UE autonomously performs traffic steering, then response speed is improved, but collision with network control mechanisms increases
Solution Approach 1:
The patent applies preliminary anti-action by having the network send deactivation commands to UE-based traffic steering before potential conflicts with RAN/WLAN aggregation can occur. The network proactively prevents autonomous UE steering when network-controlled aggregation is needed, eliminating collisions before they happen
Solution Approach 2:
The network performs preliminary action by activating or deactivating UE-based traffic steering based on predicted network conditions. Before network-controlled RAN/WLAN aggregation is initiated, the network can preemptively deactivate UE-based steering to prevent potential collisions, preparing the system in advance for coordinated operation
Data Source
AI summary
Provided are a method of activating or deactivating terminal-based traffic steering by a terminal in a wireless communication system, and a device for supporting the same. The terminal performs terminal-based traffic steering, and transmits WLAN offloading information indicating a RAN/WLAN interworking state to a network, wherein the terminal-based traffic steering may be traffic steering on the basis of a RAN rule or ANDSF.