UE Inactive State Management via Selective Cell Search
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Solution Overview
Problem
In the context of 5G communication systems, there is a challenge in maintaining an inactive state for user equipment (UE) while determining that a service is not provided by the serving public land mobile network (PLMN), which affects the efficient management of network resources and user device performance.
Innovation Solution
An electronic device and method that allow the UE to enter an inactive state based on detecting an RRC release message, perform a search for a suitable cell, and maintain this state until a timer expires, ensuring optimal resource utilization and network connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs a search for a suitable cell while maintaining the inactive state, then the network resource utilization is improved, but the power consumption of the UE increases
Solution Approach 1:
The patent applies partial action by having the UE perform cell search only partially - specifically searching for suitable cells only when service cannot be provided by the serving PLMN, rather than continuously searching. The UE performs search operations selectively based on service availability conditions, reducing unnecessary power consumption while maintaining network resource utilization efficiency.
Solution Approach 2:
The patent changes the operational parameters of the UE by introducing a timer mechanism and service availability detection. The UE transitions between different search behaviors based on parameter changes - when service is available, normal operation continues; when service becomes unavailable, the UE starts a timer and begins cell search operations, adjusting its behavior dynamically based on network conditions.
2Use of energy by moving object
If the UE maintains the inactive state for as long as possible, then the power consumption is reduced, but the response time to network changes increases
Solution Approach 1:
The patent implements feedback mechanisms through timer monitoring and service availability detection. The UE continuously monitors network service availability and uses timer expiration as a feedback trigger. When the timer expires or service becomes available, the UE can transition states appropriately, ensuring timely response to network changes while maintaining low power consumption during normal inactive operation.
Solution Approach 2:
The patent makes the UE's operational state dynamic rather than static. The UE can transition between inactive and connected states based on real-time network conditions and timer status. This dynamic behavior allows the UE to maintain low power consumption during stable conditions while quickly responding to network changes when needed, balancing power efficiency with response time requirements.
Data Source
AI summary
An electronic device according to various embodiments may include: at least one communication processor configured to support at least one network communication, wherein the at least one communication processor is configured to: enter an inactive state based on detecting an RRC release message after establishing an RRC connection with a first cell and entering a connected state, identify that a service cannot be provided in the inactive state, perform a search until a timer started based on a reception of the RRC release message expires, and maintain the inactive state based on camping-on a selected cell based on a result of the search.