Multi-USIM Capability Reporting in 5G NR Registration
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Solution Overview
Problem
Current wireless communication systems lack effective coordination and awareness of multi-USIM (Universal Subscriber Identity Module) capabilities in user equipment (UE), leading to performance degradations and reduced system capacity due to inadequate handling of simultaneous network registrations and paging scenarios.
Innovation Solution
A method where the UE detects the presence of multiple USIMs belonging to the same network and sends a message indicating their presence and capabilities to the Home Subscriber Server (HSS) through access registration or registration update procedures, enabling network awareness and coordination of multi-USIM operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the UE uses a single RF platform to support multiple USIMs, then the device complexity is reduced and cost is lowered, but the UE cannot simultaneously maintain RRC Connected state with multiple networks, leading to performance degradation when paging collisions occur
Solution Approach 1:
The patent segments the handling of multiple USIMs by introducing a dedicated indicator field in the registration message that identifies which USIM is registering. This allows the network to distinguish between different USIMs and manage their connections separately, even though they share the same RF platform. The segmentation of control information enables reliable multi-USIM operation without requiring separate RF platforms.
Solution Approach 2:
The patent introduces an intermediary mechanism - the multi-USIM indicator and network awareness system - that mediates between the single RF platform and multiple USIMs. The network uses this indicator to coordinate paging and connection management, acting as an intermediary that resolves the conflict between limited RF resources and multiple simultaneous connections.
2Ease of operation
If the UE registers multiple USIMs with the network without notifying them of multi-USIM capability, then the registration procedure is simpler, but the network cannot coordinate paging and connection management, causing connection drops and performance degradation
Solution Approach 1:
The patent applies preliminary action by having the UE notify the network of its multi-USIM capability during the initial registration procedure. By including the multi-USIM indicator in the registration message from the outset, the network is prepared in advance to handle paging and connection management appropriately, avoiding connection drops and performance degradation that would occur without this advance notification.
3Device complexity
If the network is unaware of multi-USIM capability, then the network configuration remains simple, but coordination of simultaneous operations and collision avoidance cannot be achieved
Solution Approach 1:
The patent implements feedback by having the UE provide information about its multi-USIM capability to the network during registration. This feedback mechanism ensures the network has the necessary information to coordinate paging and connection management for multiple USIMs, while keeping the network configuration relatively simple by using existing registration procedures enhanced with an indicator field.
Data Source
AI summary
A user equipment (UE) for wireless communication is disclosed. The UE includes one or more non-transitory computer-readable media having computer-executable instructions embodied thereon, at least one processor coupled to the one or more non-transitory computer-readable media, and configured to execute the computer-executable instructions to: detect a presence of a first USIM and a second USIM in the UE, the first and second USIMs belonging to the same network, and send a message, using the first USIM, to the network through either an access registration procedure or a registration update procedure, the message indicating the presence of the first and second USIMs and capabilities associated with the first and second USIMs.