DSDS Call Transition Detection for Accurate Drop-Call Metrics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dual-SIM, dual-subscription (DSDS) devices transitioning between cellular networks without informing the first network lead to mischaracterized drop-call rates, as these transitions are mistakenly counted as dropped calls.
Innovation Solution
A cellular network system that identifies and distinguishes between DSDS-device transitions and actual dropped calls by comparing timestamps, reclassifying transitions within a specified duration as non-dropped calls, thereby generating an accurate drop-call rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DSDS device transitions between cellular networks without notification, then device communication flexibility is improved, but network drop-call rate measurement accuracy deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the cellular network receives transition notifications from DSDS devices. The network's analytics module compares transition timestamps with dropped call timestamps to identify and reclassify false drop-call events, thereby maintaining measurement accuracy while allowing device flexibility.
Solution Approach 2:
The patent introduces an intermediary analytics module that acts as a mediator between the DSDS device transitions and the drop-call rate calculation. This module receives transition records, compares them with dropped call records using timestamp correlation, and filters out false positives before generating the final drop-call rate metric.
2Reliability
If network monitors all dropped calls to maintain service quality, then service reliability is improved, but false classification of device transitions increases
Solution Approach 1:
The patent uses feedback by having DSDS devices send transition notifications to the network, which are then cross-referenced with dropped call records. This feedback loop enables the network to distinguish between actual dropped calls and legitimate device transitions, reducing false classifications while maintaining service reliability monitoring.
3Measurement precision
If network reclassifies dropped calls using transition timestamps, then drop-call rate accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by having DSDS devices send transition notifications to the network before the network would otherwise classify the event as a dropped call. The analytics module proactively compares these pre-arrived transition records with dropped call records, enabling accurate reclassification without adding complex real-time processing requirements.
Data Source
AI summary
A cellular network compares the timestamps of dropped calls with the timestamps of DSDS-device transitions from the cellular network to another cellular network to identify apparent dropped calls as being transitions and not dropped calls. In this way, the cellular network avoids mis-characterizing DSDS-device transitions as being dropped calls, thereby resulting in the generation of a more-accurate drop-call rate for the cellular network.