Mobile Call Control via Reachability Supplements
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Solution Overview
Problem
Existing methods for establishing telephone connections to mobile communications terminal devices via mobile communications networks face challenges such as lack of control over call routing, especially when calls are initiated from fixed-line networks, leading to issues like tromboning and inefficient call handling due to unknown device reachability and location.
Innovation Solution
A method that adds a supplemental control parameter to the mobile telephone number, independent of the number itself, which analyzes the reachability status before initiating a call, allowing for controlled call establishment based on specific conditions such as network location, call forwarding settings, and geographic reachability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If control of call routing is left to the mobile communications network, then call establishment can proceed automatically, but the calling party has no influence on alternative call routing and tromboning occurs
Solution Approach 1:
The calling party specifies desired call routing properties in advance by adding control parameters to the dialed number before the call is initiated. This allows the calling party to pre-determine routing preferences without needing to control the routing process in real-time, resolving the contradiction between automatic establishment and calling party influence.
2Adaptability or versatility
If call routing is controlled from the fixed-line network, then calling party can influence routing, but it is unknown whether the mobile device is available or located, leading to tromboning
Solution Approach 1:
The system queries the mobile communications network to obtain feedback information about the mobile device's reachability status and location. This feedback is then used to determine whether to establish the call or apply alternative routing, allowing the calling party to make informed routing decisions based on actual device availability, thus preventing tromboning while maintaining control.
3Adaptability or versatility
If a supplement is added to the mobile telephone number to enable calling party control, then routing flexibility improves, but the complexity of call establishment increases
Solution Approach 1:
The control parameters are added as supplements to the mobile telephone number, creating an intermediary structure that carries routing instructions. This intermediary mechanism allows complex routing control to be implemented through a simple extension of the existing number dialing process, minimizing the increase in system complexity while maximizing routing flexibility.
Data Source
AI summary
The invention relates to a method for establishing a telephone connection to a mobile communications terminal device (11) via a mobile communications network (5, 7, 9), with at least one mobile telephone number being assigned to the mobile communications terminal device (11), wherein a supplement i.e. prefix or suffix as a control parameter is added to the mobile telephone number, the supplement being independent from the mobile telephone number. Before establishing the telephone connection an analysis of this supplement is made and the reachability of the mobile communications terminal device (11) is determined. The “reachability” is that the calling party only wants to make the call if the called party is available in real time i.e. does not want to be forwarded to voice-mail. Another example is that the call should only be established for calls that remain in the same network, so as to save costs. The supplement indicates whether the establishment of a telephone connection shall be initiated or suppressed. The establishment of the telephone connection is then initiated dependent upon the supplement only if there is a certain reachability case of the called mobile communications terminal device (11), the reachability case being indicated by the supplement.