PBX Mobility System Call Leg Reuse
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Solution Overview
Problem
Conventional FMC systems face challenges in efficiently managing multiple call legs, leading to increased costs and user complexity, particularly when establishing second calls and merging calls into conferences, due to the need for separate network resources and complex media handling configurations.
Innovation Solution
A session management platform (SMP) reuses existing cellular call legs to establish additional calls, utilizing third-party call control over a session control interface to connect media and call control signaling between multiple call legs, thereby reducing the need for new network resources and simplifying media handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a second cellular call is initiated to establish a second call leg, then multiple calls can be connected to the wireless device, but the cost increases (network usage and monetary) and device complexity increases
Solution Approach 1:
The patent merges multiple call legs with the wireless device into a single cellular call. Instead of establishing separate cellular calls for each call leg, the system combines them so that multiple calls (first call leg, second call leg, third call leg) share one cellular call connection to the wireless device. This reduces the number of cellular calls from multiple to one, thereby reducing cost and simplifying management while maintaining the capability to connect multiple calls.
2Reliability
If separate network resources are allocated for each call leg, then call quality is maintained, but network resource consumption and cost increase
Solution Approach 1:
The patent makes a single cellular call connection serve multiple functions by having it support multiple call legs simultaneously. The first cellular call connection is not dedicated to a single call but is shared across the first call leg, second call leg, and third call leg. This multi-functional use of the cellular call connection reduces network resource consumption while maintaining call quality through proper resource management within the shared connection.
3Adaptability or versatility
If the FMC server handles media handling for multiple devices, then call connectivity is achieved, but system complexity and configuration difficulty increase
Solution Approach 1:
The patent extracts the media handling function from the FMC server and places it at the wireless device itself. Instead of the FMC server being responsible for exchanging media information between multiple devices, the wireless device performs media handling locally. This extraction of the media handling function from the server reduces configuration complexity and simplifies the server's role while maintaining full call connection capability.
Data Source
AI summary
A private branch exchange (PBX) mobility system and associated method for re-using of call legs in an enterprise system. The enterprise system includes a session management platform (SMP) having a private branch exchange (PBX) mobility enabler, the PBX mobility enabler having third-party control communications to one or more PBXs over a session control interface, such as a Session Initiation Protocol (SIP) interface. The PBXs are in communication with one or more media servers. The PBX mobility enabler is configured to provide control communications to the PBXs over the session control interfaces to re-use a wireless call leg and connect to other call legs.