UE Capability Information Management for MME Storage Constraints
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Solution Overview
Problem
Current wireless communication systems face challenges in managing user equipment (UE) capabilities, particularly due to storage limitations in Mobility Management Entities (MMEs), which restrict the size of UE capability information, leading to inefficiencies in UE functionality and battery life, especially when handling devices with extensive capabilities.
Innovation Solution
Implementing temporary operating modes for UE devices, such as Normal, Low Data Rate, and Limited Mobility modes, which allow flexible UE capability information setting and transfer, enabling devices to adapt their functionality based on current operating conditions and network requirements, thereby optimizing battery life and system throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UE capability information is stored in full detail in MME, then complete UE functionality is supported, but storage limitations in MME are exceeded
Solution Approach 1:
The UE capability information is segmented into multiple parts: a first set of capability information is stored in the MME, while a second set of capability information is stored in the UE itself. This segmentation allows the MME to store only essential capability data within its storage limitations, while the UE maintains complete capability information for full functionality support.
Solution Approach 2:
The solution moves capability information storage from a single location (MME) to multiple locations (both MME and UE), effectively adding a spatial dimension to the storage architecture. This distributed storage approach resolves the contradiction by allowing the MME to operate within its storage constraints while the system as a whole maintains complete capability information.
2Adaptability or versatility
If UE operates with full capabilities, then functionality is maximized, but battery life is reduced
Solution Approach 1:
The UE dynamically adjusts its operating mode based on network conditions and requirements. The network can request specific capability subsets from the UE, allowing the device to transition between different functional states. This dynamic adaptation enables the UE to conserve energy by operating with reduced capabilities when appropriate, while maintaining full functionality when needed.
Solution Approach 2:
The UE changes its operational parameters by selectively activating different capability sets. Instead of maintaining all capabilities at full power continuously, the UE adjusts its capability presentation to the network based on current needs, effectively changing the parameter of capability availability to optimize the balance between functionality and energy consumption.
3Quantity of substance
If UE capability information is reduced to fit MME storage, then storage limitations are satisfied, but UE functionality is limited
Solution Approach 1:
The UE prepares and stores capability information in advance in its own memory, so that when the network needs specific capability data, it can quickly provide the requested information without being constrained by MME storage limitations. This preliminary action ensures the UE can present appropriate capability subsets on demand while maintaining full functionality internally.
4Loss of information
If UE constantly reports full capabilities, then network has complete information, but signaling overhead increases
Solution Approach 1:
The network extracts only the specific capability information it needs from the UE at any given time, rather than requiring the UE to continuously report all capabilities. The MME stores a first set of capability information and requests additional specific capability information from the UE as needed, reducing signaling overhead while maintaining information completeness when required.
Data Source
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AI summary
Systems, apparatus, user equipment (UE), evolved node B (eNB), mobility management entities (MME), and methods are described for UE capability information setting. One example embodiment operates to set first UE capability information in an initial attach procedure; identify a temporary operating mode for the first UE associated with a second set of UE capability information; and change the capability information to a second set of UE capability information associated with the temporary operating mode. Various embodiments may signal between a UE, an eNB, and a MME to enable use of different sets of UE capability information for different temporary operating modes.