Asynchronous Backup Path for Cellular Voice Continuity
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Solution Overview
Problem
User equipment (UE) experiences service interruptions due to poor wireless signal quality, especially when moving to the edge of a cell or encountering obstructions, leading to potential loss of connectivity during voice calls or data communications in cellular networks.
Innovation Solution
An asynchronous communications service is implemented to provide a backup communication path between the UE and a remote endpoint device, allowing voice data to be sent through data sessions even when the primary wireless connection is weak, using a server coupled with cellular access network nodes and core network nodes to maintain communication without relying on a stable full-duplex connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cellular network communication is used for voice calls and data communications, then communication coverage and connectivity are provided, but service interruptions occur due to poor wireless signal quality at cell edges or when encountering obstructions
Solution Approach 1:
The patent introduces an asynchronous communication service as an intermediary backup path. When the primary cellular communication path experiences poor signal quality or service interruptions, the system automatically switches to the asynchronous communication service, which uses data sessions to transmit voice data. This intermediary solution resolves the contradiction by providing an alternative communication route that bypasses the harmful effects of poor wireless signal quality.
Solution Approach 2:
The system implements prior cushioning by establishing an asynchronous communication service in advance as a backup mechanism. Before service interruptions occur due to poor signal quality, the system has already prepared an alternative communication path. This proactive approach ensures that when signal quality deteriorates, the system can immediately switch to the pre-established backup path, cushioning against the harmful effects of poor wireless signal quality.
2Ease of operation
If a stable full-duplex connection is required for voice calls, then communication quality is maintained, but connectivity is lost when moving to cell edges or encountering obstructions
Solution Approach 1:
The patent applies dynamics by making the communication system adaptive and flexible. Instead of relying on a static full-duplex connection that fails under poor signal conditions, the system dynamically switches between different communication modes. When signal quality is good, it uses traditional full-duplex voice calls; when signal quality deteriorates, it dynamically transitions to asynchronous communication with data sessions. This dynamic adaptation resolves the contradiction between maintaining communication continuity and dealing with poor wireless signal quality.
Solution Approach 2:
The system changes communication parameters based on signal quality conditions. It monitors wireless signal quality and adjusts the communication mode accordingly - switching from real-time full-duplex voice communication to asynchronous data session-based communication when signal quality parameters indicate poor conditions. This parameter change allows the system to maintain communication continuity despite varying wireless signal quality.
3Reliability
If traditional cellular communication protocols are used, then voice calls and data communications are supported, but service outages occur during periods of poor signal quality
Solution Approach 1:
The patent ensures continuity of useful action by implementing an asynchronous communication service that can operate independently of traditional cellular voice call protocols. When the primary communication path experiences service interruptions, the system maintains continuous communication through data sessions that do not rely on the unstable voice call connection. This ensures that the useful action of communication continues without interruption, resolving the contradiction between service availability and service interruption duration.
Data Source
AI summary
In some examples, a wireless device communicates in a communications session over a cellular network with a remote endpoint device. The wireless device detects a condition indicating potential loss of wireless connectivity or actual loss of wireless connectivity with the cellular network. In response to the detecting, communication with the remote endpoint device is transferred to a communication path including a service that supports asynchronous communications.