Femtocell Call Routing via Application Server Intermediary
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Solution Overview
Problem
Current telecommunications networks lack efficient mechanisms to redirect calls between fixed and mobile lines based on femtocell connectivity, leading to potential increased charges and limited user convenience in presenting a unified call appearance.
Innovation Solution
An application server that determines whether a mobile station is connected to a home femtocell and redirects calls or changes presentation numbers accordingly, using a Home Location Register or Home Subscriber Service to identify basestation connections and implement call routing preferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If calls are forwarded to mobile station based on traditional call forwarding mechanisms, then call connectivity is maintained, but user convenience is reduced and additional charges are incurred
Solution Approach 1:
The application server acts as an intermediary between the fixed line network and mobile network, automatically determining femtocell connectivity status and routing calls accordingly. This mediator eliminates the need for manual call forwarding configuration by end users, improving convenience while managing routing complexity centrally
Solution Approach 2:
The system provides self-service call routing by automatically detecting whether a mobile station is connected to its home femtocell and routing calls accordingly without user intervention. The application server autonomously makes routing decisions based on connectivity status, eliminating manual configuration requirements
2Reliability
If traditional call forwarding is used to redirect calls to mobile devices, then call delivery is achieved, but additional charges are imposed on subscribers
Solution Approach 1:
The application server performs preliminary determination of femtocell connectivity status before routing calls. By pre-checking whether the mobile station is connected to its home femtocell, the system can proactively route calls through the femtocell network, avoiding traditional call forwarding charges while maintaining reliable call delivery
Solution Approach 2:
The system changes the routing parameter based on connectivity status - when a mobile station is connected to its home femtocell, calls are routed through the femtocell network instead of traditional call forwarding. This parameter change eliminates forwarding charges while maintaining call delivery reliability
3Adaptability or versatility
If call routing is based on fixed line number alone, then network simplicity is maintained, but unified call appearance capability is lost
Solution Approach 1:
The application server provides universal call routing capability that works for both fixed line and mobile station connections. By determining whether a mobile station is connected to its home femtocell, the system can uniformly handle both scenarios - routing calls to the mobile device when connected to femtocell, or to the fixed line otherwise, achieving unified call appearance
Solution Approach 2:
The system uses feedback from the network about mobile station connectivity status to dynamically adjust routing decisions. The application server receives information about whether the mobile station is connected to its home femtocell and uses this feedback to make intelligent routing decisions, enabling unified call appearance without excessive complexity
Data Source
AI summary
An application server for use in a telecommunications network. The application server comprises a receiver for receiving an indication of a call setup or message to a fixed line telephone number of a subscriber, a determining unit for determining whether a mobile station of the subscriber is connected to a home femtocell of the subscriber, and a redirection unit for causing the call setup or message to be redirected towards the mobile station if the subscriber's mobile station is connected to the home femtocell.