Wireless Device Multiple Call Types for Seamless Connectivity

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Solution Overview

Problem

Conventional circuit switched fallback (CSFB) techniques in wireless communication often cause user-detectable interruptions during voice calls due to the need to switch between different radio access technologies (RATs) in response to connectivity issues, leading to suboptimal user experience.

Innovation Solution

Implementing a wireless device with the capability to select call types based on failure probability by generating location records that identify the likelihood of call failures, allowing for proactive switching to a fallback call type when the default call type is likely to fail, and enabling multiple call types to be used concurrently to maintain call quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If circuit switched fallback (CSFB) techniques are used to provide circuit switched connection when packet switched network is not available, then connectivity reliability is improved, but user experience deteriorates due to detectable interruptions

Engineering Contradiction:

Improveconnectivity reliabilityVSAvoiduser-detectable interruptions

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary actions by establishing a circuit switched connection before the packet switched connection fails. The wireless device proactively sets up an alternative communication path in advance, so that when the primary packet switched connection deteriorates or fails, the fallback to circuit switched network occurs seamlessly without user-detectable interruptions.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If multiple call types are used concurrently for a call event, then call reliability is improved by maintaining continuous communication, but device complexity increases

Engineering Contradiction:

Improvecall reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple call types (packet switched and circuit switched) into a single unified call event. The wireless device combines both call types concurrently, integrating their media streams and control planes to provide continuous, reliable communication while managing the complexity through unified handling mechanisms.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The wireless device is designed with multi-functionality to handle multiple call types simultaneously. It can operate on both packet switched and circuit switched networks, adapting to different network conditions and providing universal communication capability across different RATs (Radio Access Technologies).

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11838806B2Multiple call types for a call event

Publication Date: 2023.12.05 MOTOROLA MOBILITY LLC

AI summary

Techniques for multiple call types for a call event are described and may be implemented via a wireless device to enable multiple connections for wireless calls. For instance, redundant connections for a call event of a wireless device are established via different call types and utilized to exchange call media of the call event. In at least some implementations, call media from the different call types is combined to provide a combined media stream for output as part of the call event. Thus, techniques for multiple call types for a call event are applicable to increase call quality in different scenarios and environments, such as in situations where a primary call connection experiences an anomaly condition that causes quality call degradation.