UE Mobility Mode Selection via ANDSF Priority Values
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Solution Overview
Problem
There is a need for enhanced cooperation and integration between WLAN and cellular networks to effectively manage mobility modes in User Equipment (UE) devices, particularly in resolving conflicts and optimizing communication between different access systems.
Innovation Solution
The UE device includes a WLAN transceiver and a cellular transceiver, along with an Access Network Discovery and Selection Function (ANDSF) client module, which receives Management Objects (MOs) from an ANDSF server containing mobility priority values and indicators. A controller within the UE selects between cellular/WLAN aggregation mode and ANDSF mode based on comparisons of these priority values within a predefined range to determine the optimal mobility mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE supports multiple WLAN mobility modes (cellular/WLAN aggregation mode and ANDSF mode), then the adaptability and versatility of the device is improved, but the device complexity increases due to the need to manage and select between multiple modes
Solution Approach 1:
The patent applies parameter changes by introducing priority values associated with different WLAN mobility modes. The network can dynamically adjust these priority values to control which mode the UE should select. This resolves the contradiction by providing a simple parameter-based mechanism that enables versatile mode selection without increasing device complexity, as the UE only needs to compare and select modes based on received priority values.
2Ease of operation
If the UE automatically selects mobility modes based on priority values, then the ease of operation is improved, but the measurement precision of mode selection may deteriorate if priority values do not accurately reflect optimal network conditions
Solution Approach 1:
The patent implements feedback by having the network continuously monitor UE mobility performance and adjust the priority values of different WLAN mobility modes accordingly. This closed-loop approach ensures that the automatic mode selection remains accurate by adapting priority values based on actual network conditions and UE behavior, thus maintaining measurement precision while preserving ease of operation.
3Loss of information
If the network provides detailed management objects with multiple priority nodes for different WLAN mobility modes, then the information completeness is improved, but the loss of information increases due to the complexity of processing and interpreting multiple priority values
Solution Approach 1:
The patent applies the extraction principle by isolating the essential selection criterion (priority value) from the complex Management Object structure. The UE extracts only the priority values associated with different WLAN mobility modes from the detailed Management Objects, ignoring other less critical information. This reduces processing complexity while maintaining information completeness for the essential selection decision.
Data Source
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AI summary
Some demonstrative embodiments include devices, systems and methods of selecting a mobility mode of a User Equipment (UE). For example, a UE may include a Wireless Local Area Network (WLAN) transceiver; a cellular transceiver to communicate with a cellular node; an Access Network Discovery and Selection Function (ANDSF) client module to communicate with an ANDSF server; and a controller to select a WLAN mobility mode from a cellular/WLAN aggregation mode and an ANDSF mode.