Multi-SIM Terminal Cell Selection Priority Based on Identifier State
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Solution Overview
Problem
Multi-SIM or multi-registration user equipment (UE) operating in multiple cells simultaneously experiences signal loss due to at least one identifier being in an idle or inactive state, affecting wireless transmission performance due to limitations in band capabilities.
Innovation Solution
A method for determining cell selection or reselection priority for a terminal's first identifier based on the operating cell of a second identifier, where the second identifier is different, allowing the terminal to camp on cells corresponding to supported bands or band combinations, enabling simultaneous operation across multiple cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-SIM or multi-registration UE operates in multiple cells simultaneously, then the UE can receive or transmit signals in multiple cells, but at least one card or one registered identifier must be in an idle state due to band capability limitations, resulting in signal loss
Solution Approach 1:
The patent implements dynamic cell selection and reselection mechanisms that adaptively adjust the operating states of different identifiers based on current band capability constraints. The system dynamically transitions identifiers between idle and active states, and adjusts cell selection priorities in real-time to optimize signal reception while accommodating hardware limitations.
Solution Approach 2:
The patent changes key parameters including cell selection priorities, frequency band allocations, and identifier states to resolve the contradiction. By adjusting these parameters dynamically, the system enables simultaneous operation in multiple cells while preventing signal loss through coordinated parameter management.
2Adaptability or versatility
If a UE uses multiple identifiers to register with multiple networks, then the UE can potentially operate in multiple cells, but band capability limitations force at least one identifier into idle state, affecting wireless transmission performance
Solution Approach 1:
The patent performs preliminary cell selection and identifier state assignment before actual communication operations. By pre-configuring which identifiers should be active or idle based on predicted band capability requirements, the system avoids performance degradation during actual transmission while maintaining multi-cell adaptability.
Solution Approach 2:
The patent implements feedback mechanisms that monitor the actual performance of each identifier and cell combination. Based on this feedback, the system adjusts identifier states and cell selection priorities to maintain optimal wireless transmission performance while preserving multi-cell operation capability.
3Reliability
If the UE prioritizes operating in multiple cells simultaneously, then the UE can improve wireless transmission performance, but band capability limitations require at least one identifier to be in idle state, causing signal loss
Solution Approach 1:
The patent introduces cell selection priority as an intermediary mechanism that mediates between the competing requirements of wireless transmission performance and signal reception capability. This intermediary parameter allows the system to balance the allocation of active vs. idle identifier states across different cells, optimizing overall system performance.
Solution Approach 2:
The patent dynamically adjusts the number and state of active identifiers based on real-time assessment of band capabilities and cell conditions. This dynamic adaptation allows the system to maximize wireless transmission performance when conditions permit, while maintaining signal reception capability through flexible state transitions.
Data Source
AI summary
A cell selection or reselection method includes: when a first identifier of the terminal is in an idle state or an inactive state, determining a cell selection or reselection priority of the first identifier according to an operating cell of a second identifier of the terminal. The second identifier is different from the first identifier.