Packet-Based Voice Call Stall Detection for Adaptive Handover

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Voice calls in wireless communications systems may stall due to poor channel quality or network congestion, leading to gaps in communication and call failures, which degrade user experience.

Innovation Solution

A UE detects voice call stalls by evaluating packet reception against a threshold value during an evaluation period and initiates a handover to a different serving cell or radio access technology when the packet count falls below the threshold, using real-time transport control protocol reports and silence indicators to adapt the threshold.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If packet-based voice call techniques are used, then communication flexibility and network efficiency are improved, but voice call stalls and call failures occur due to poor channel quality or network congestion

Engineering Contradiction:

Improvenetwork efficiencyVSAvoidvoice call continuity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by detecting voice call stalls before they cause complete call failure. The system continuously monitors packet reception during evaluation periods and identifies stalls proactively, allowing mitigation actions to be taken before the call terminates, thus maintaining voice call continuity while using efficient packet-based techniques

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback mechanisms by evaluating packet reception statistics and using this information to trigger handover decisions. The system receives feedback about packet loss rates and call stall conditions, then uses this feedback to initiate corrective actions such as handover to different serving cells, resolving the contradiction between network efficiency and call reliability

Inventive Principle:

Principle #23Feedback

2Reliability

If handover is initiated frequently to prevent call stalls, then voice call reliability is improved, but network resource consumption and system complexity increase

Engineering Contradiction:

Improvevoice call continuityVSAvoidhandover management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by using dynamically adjustable thresholds for stall detection. The system changes the evaluation criteria and packet count thresholds based on call conditions, allowing handover decisions to be made reliably without requiring complex management logic. This resolves the contradiction by maintaining simplicity while improving reliability through adaptive parameter adjustment

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250330885A1Techniques for voice call stall detection and mitigation

Publication Date: 2025.10.23 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described for identification of a voice call stall of a packet-switched voice call. A user equipment (UE) may establish a packet-based voice call with a peer device via a wireless communications system. The packet-based voice call may be evaluated by the UE to determine a presence of a voice call stall and, in the event that a voice call stall is detected, a handover of the UE to a different serving cell or a different radio access technology may be triggered. The voice call stall may be identified based on a threshold value of a quantity of voice call packets expected to be received during an evaluation period. In the event that a quantity of voice call packets received during the evaluation period is below the threshold value, a handover of the UE may be initiated.