Integrating Cellular Calls as Enterprise VoIP via Network Node Patching
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Solution Overview
Problem
Current communications networks face difficulties in integrating Voice-over-IP (VoIP) enterprise networks with carrier cellular telephony networks due to issues like delay and Quality of Service (QoS), which prevent cost-effective provision of acceptable quality voice services, and lack control over employee calls for tracking and monitoring purposes.
Innovation Solution
A system and method that integrates an outgoing cellular call as an enterprise call by presenting the enterprise address instead of the cellular address to the called party, using a network node to establish two call legs and patch them for end-to-end communication, enabling control and monitoring of calls across different network environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cellular networks use conventional circuit-switched technology for telephony calls, then call quality and reliability are maintained, but delay and Quality of Service issues prevent cost-effective usage for VoIP services
Solution Approach 1:
The patent segments the call establishment process into multiple phases: initial SIP signaling exchange for call setup, followed by media connection establishment. This allows the signaling to use IP-based protocols while the media path can use circuit-switched technology, separating control plane and user plane functions to resolve the contradiction between VoIP flexibility and circuit-switched reliability.
Solution Approach 2:
The patent introduces an intermediary mechanism (SIP proxy server or gateway) that mediates between the IP-based enterprise network and the circuit-switched cellular network. This intermediary translates SIP signaling into circuit-switched signaling protocols, enabling seamless interoperation while maintaining the benefits of both network types.
2Adaptability or versatility
If enterprises allow employees to use mobile communications devices for business communications, then communication flexibility and employee productivity are improved, but control and monitoring capabilities over employee calls are lost
Solution Approach 1:
The patent implements feedback mechanisms where the enterprise network can monitor and control calls initiated from mobile devices. The SIP proxy server receives call setup requests, logs call information, and can enforce enterprise policies, providing continuous feedback control over employee communications while maintaining flexibility.
Solution Approach 2:
The patent creates a universal communication framework where mobile devices can operate in multiple modes (cellular network mode and enterprise network mode) through a single interface. The SIP client on the mobile device can register with the enterprise network and route calls appropriately, providing multi-functionality without requiring separate devices for different communication needs.
3Adaptability or versatility
If VoIP enterprise networks are integrated with carrier cellular telephony networks, then seamless communication across network boundaries is achieved, but delay and Quality of Service issues prevent cost-effective deployment
Solution Approach 1:
The patent implements preliminary registration and authentication actions where mobile devices register with the enterprise SIP network before making calls. Call forwarding rules and routing policies are pre-configured, so when a call is initiated, the setup process is accelerated by using pre-established routing paths and pre-negotiated parameters.
Solution Approach 2:
The patent introduces dynamic call routing capabilities where the network can adaptively select between different paths (direct cellular path, IP-based path, or gateway path) based on current network conditions, call type, and quality requirements. This dynamic routing optimizes call setup time and quality by selecting the most appropriate path in real-time.
Data Source
AI summary
A method on a wireless user equipment (UE) device facilitates integration of an outgoing cellular call as an enterprise call. The UE device attaches to a wide area cellular network on which the device has a non-enterprise address. Upon blocking incoming calls, the UE device sends a request to a node in a data network to initiate an outgoing cellular call with an expectation of receiving an incoming circuit-switched (CS) call back from the network node within a time window. The incoming CS call contains an enterprise address associated with a user of the wireless UE device as a calling line identity to identify that the incoming CS call is related to the request to initiate the outgoing cellular call. The UE device indicates to the network node that a call leg is established between the enterprise user and the network node.