UE Network Selection Using SENSE Thresholds for Poor Coverage
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Solution Overview
Problem
Existing wireless communication systems fail to consider signal level during initial network selection after switch-on or recovery from loss of coverage, leading to stationary devices selecting networks with poor coverage, which results in frequent registration failures and requires manual intervention.
Innovation Solution
Implementing a Signal Level Enhanced Network Selection (SENSE) method that prioritizes PLMNs with signal quality above an operator-controlled threshold, excluding disaster-related networks, to ensure stable network connections for stationary devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PLMN selection is based on operator-controlled priority ordering, then network selection follows standardized procedures and operator policies, but UEs may select networks with poor coverage leading to unstable connections
Solution Approach 1:
The patent modifies the network selection criteria by introducing signal quality thresholds as an additional parameter. The UE evaluates candidate networks based on both operator priority and signal quality metrics (RSRP, RSRQ, SINR), selecting networks that meet minimum quality thresholds rather than solely following operator priority lists. This parameter enhancement resolves the contradiction by maintaining automated selection while improving connection stability through quality-aware network choice.
2Reliability
If UEs select networks according to operator-controlled PLMN selector priority, then network selection follows predefined ordering, but stationary devices without user supervision select networks with poor coverage
Solution Approach 1:
The patent implements a feedback mechanism where the UE continuously monitors signal quality metrics (RSRP, RSRQ, SINR) of selected networks and uses this information to inform subsequent network selection decisions. The UE compares measured signal qualities against thresholds and adjusts network selection accordingly, creating a closed-loop system that maintains autonomous operation while improving transmission reliability through quality-aware selection.
3Productivity
If network selection considers only cell selection criteria and PLMN priority, then selection process is simple and fast, but UEs stay on networks with poor coverage
Solution Approach 1:
The patent introduces dynamic network selection that adapts to real-time signal conditions. The UE evaluates multiple candidate networks using both static operator priority information and dynamic signal quality measurements. The selection process dynamically adjusts based on current radio conditions, choosing networks that satisfy both operator policies and quality thresholds, thereby maintaining selection efficiency while improving coverage quality through adaptive decision-making.
Data Source
AI summary
Method and apparatus are provided for automatic network selection at switch-on or recovery from loss of coverage. In one novel aspect, during network selection upon UE switch on or recovery from lack of coverage, the UE sets the priority of a Public Land Mobile Network (PLMN) broadcasting disaster related indication to be absolutely lower than other PLMNs no matter the received signal strength or quality of the corresponding PLMN. The UE, supporting Signal level Enhanced Network Selection (SENSE) for network selection, performs an automatic network selection procedure using an obtained SENSE threshold. The UE detects a first PLMN (not offering disaster services) with a first signal level below the SENSE threshold, and a second PLMN offering disaster services with a second signal level above the SENSE threshold. The UE prioritizes the first PLMN over the second PLMN when the UE receives a disaster indication from the second PLMN.