Multi-USIM UE RRC State Transitions for 5G Service Adaptability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 4G LTE networks are inadequate for supporting the high reliability and low latency requirements of 5G services, particularly in scenarios like autonomous driving and virtual reality, due to limitations in core network design and the inability to efficiently manage dual or multi-USIM user equipment (UE) in 5G networks.
Innovation Solution
A method for operating User Equipment (UE) supporting multiple Universal Subscriber Identity Modules (USIMs by transmitting and receiving specific Radio Resource Control (RRC) messages to change network states, allowing for simultaneous registration and communication across multiple networks, and suspending/resuming active communication to manage resource allocation and service transitions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 4G LTE core network design is used, then existing network infrastructure is maintained, but high reliability and low latency requirements for 5G services cannot be met
Solution Approach 1:
The patent implements dynamic network state management through RRC state transitions (connected, inactive, idle states) that adapt to different service requirements. The UE can dynamically switch between states based on activity patterns, enabling the network to provide both high reliability for active services and energy efficiency for inactive services, while maintaining 5G service adaptability.
Solution Approach 2:
The patent utilizes RRC state parameters (connected, inactive, idle) as changeable states that modify network behavior. By transitioning between these states, the system can adjust resource allocation, latency characteristics, and reliability levels to match different 5G service requirements, thereby resolving the contradiction between maintaining existing infrastructure and achieving 5G service adaptability.
2Ease of operation
If dual or multi-USIM UE is supported, then user convenience is improved, but network resource management complexity increases
Solution Approach 1:
The patent segments the RRC state management for each USIM independently. Each USIM maintains its own RRC state (connected, inactive, or idle) and can transition states separately. This segmentation allows the network to manage multiple USIMs without creating exponential complexity, as each USIM's state machine operates independently while sharing the same physical device resources.
Solution Approach 2:
The patent implements a universal RRC state management framework that handles multiple USIMs through a common set of states and transition rules. The same RRC state machine design serves all USIMs, providing multi-functionality without requiring separate management systems for each USIM, thereby reducing overall network management complexity while supporting user convenience.
3Reliability
If RRC connected state is maintained for active communication, then communication reliability is improved, but network resource consumption increases
Solution Approach 1:
The patent implements periodic state transitions between connected, inactive, and idle states based on communication activity patterns. During active communication, the UE remains in connected state for high reliability. When communication pauses, the UE transitions to inactive or idle states to reduce resource consumption. This periodic action between states resolves the contradiction by matching resource usage to actual communication needs.
Solution Approach 2:
The patent dynamically transitions the UE between RRC states (connected, inactive, idle) based on real-time communication requirements. When high reliability is needed, the system transitions to connected state. When resource efficiency is prioritized during low activity, the system transitions to inactive or idle states. This dynamic state management resolves the contradiction between communication reliability and network resource consumption.
Data Source
AI summary
A disclosure of the present specification provides an operating method for user equipment (UE) supporting a multiple universal subscriber identity module (USIM). The operating method may comprise the steps of: transmitting, by the UE, a first radio resource control (RRC) message to a first radio access network (RAN) in a first network; and receiving, by the UE, a second RRC message from the first RAN. The first RRC message may be transmitted on the basis of determination that the UE moves from the first network to a second network. The first RRC message may include first information about one or more protocol data unit (PDU) sessions established via the first RAN. The first and second RRC messages may be used to change an RRC state to an RRC idle state or an RRC deactivated state.