MUSIM UE Capability Restriction Handling in Wireless Networks
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in handling temporary User Equipment (UE) capability changes for Multi-Subscriber Identity Module (MUSIM) operations, particularly in scenarios where dual active MUSIM devices experience capability restrictions and network support limitations during Radio Resource Control (RRC) setup and resume procedures.
Innovation Solution
A method and wireless network architecture that enable UE to receive system information blocks indicating temporary capability restrictions, allowing for the transmission of UE capability messages to the base station, and perform handovers even when the target next-generation node B does not support dual active operations, by updating capabilities between nodes and managing wait timers to handle these changes effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network supports temporary UE capability changes for MUSIM operation, then the adaptability of the system is improved, but the device complexity increases due to additional capability management procedures
Solution Approach 1:
The network broadcasts capability restriction information in advance through system information blocks before the UE attempts to establish a connection. This preliminary notification allows the UE to prepare appropriate capability settings beforehand, reducing the complexity of real-time capability negotiation and management during actual connection establishment.
Solution Approach 2:
The patent implements a feedback mechanism where the network provides capability restriction information to the UE through system information, and the UE responds by adjusting its capability settings and indicating compliance through RRC messages. This feedback loop enables the network to manage temporary capability changes effectively while maintaining system simplicity.
2Reliability
If the UE applies temporary capability restrictions due to MUSIM operation, then the reliability of service continuity is improved, but the loss of time increases during capability adjustment and handover procedures
Solution Approach 1:
The network provides capability restriction information in advance through system information broadcasts, allowing the UE to prepare and apply necessary capability adjustments before connection establishment. This eliminates the need for time-consuming capability negotiation during actual service establishment, maintaining both reliability and minimizing time loss.
Solution Approach 2:
The patent introduces capability restriction information as an intermediary element that mediates between the network's capability requirements and the UE's MUSIM operation constraints. This intermediary allows both sides to align their capabilities efficiently without requiring lengthy real-time negotiation, thus reducing adjustment time while ensuring service continuity.
3Adaptability or versatility
If the UE performs handover to a target node that does not support dual active operations, then the adaptability of mobility is improved, but the reliability of connection stability deteriorates
Solution Approach 1:
The network broadcasts capability restriction information in advance, allowing the UE to identify target nodes that do not support dual active operations before initiating handover. The UE can then prepare appropriate capability settings and select suitable target nodes, ensuring both mobility adaptability and connection stability by avoiding incompatible handovers.
Solution Approach 2:
The patent implements a feedback mechanism where the network provides capability information about target nodes to the UE, enabling the UE to make informed handover decisions. The UE indicates its capability status in RRC messages, and the network uses this feedback to select appropriate target nodes, ensuring stable connections while maintaining mobility adaptability.
Data Source
AI summary
A user equipment (UE) in a wireless communication system is provided. The UE includes a transceiver, memory storing one or more computer programs, and one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors, cause the UE to receive, from a base station, a system information block (SIB) including a first indication on whether a transmission of a second indication is allowed, identify that a UE capability is restricted for a multi-universal subscriber identity module (MUSIM), and transmit, to the base station, a radio resource control (RRC) message including the second indication indicating a UE temporary capability restriction due to the MUSIM operation.