Home Gateway Call Status Notification for VoIP Terminals
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Solution Overview
Problem
Domestic voice over IP (VoIP) gateways, typically operating in single- or multi-line modes, do not provide visual indications of line availability, leading to user uncertainty about call feasibility, especially when multiple calls are managed simultaneously.
Innovation Solution
A notification method implemented in a home gateway that sends call status messages to connected terminals using appropriate signaling protocols (SIP, V.23, etc.), allowing terminals not involved in a call to display the number of ongoing calls, their duration, and involved terminals, enabling users to determine call availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a home gateway operates in single-communication mode or multi-communication mode without call status notification, then the gateway can manage telephone calls (single or multiple simultaneous calls), but users cannot visually determine line availability or call feasibility
Solution Approach 1:
The gateway implements a feedback mechanism by sending call status notification messages to connected terminals. When a call is established or terminated, the gateway notifies other terminals of the call status change, enabling them to display whether the line is busy or free. This resolves the information loss problem by providing real-time feedback about system state to all users.
Solution Approach 2:
The gateway acts as an intermediary between the call management system and the terminals. It receives call establishment and termination signals, processes the call status information, and transmits notification messages to appropriate terminals. This intermediary role allows the gateway to manage call information centrally while distributing status updates to multiple terminals without requiring complex peer-to-peer communication between terminals.
2Reliability
If the gateway sends detailed call status messages to all terminals, then users gain complete information about call availability, but network traffic and processing load increase
Solution Approach 1:
The notification system applies local quality by sending call status information selectively to only those terminals that need it. When a call is established on one terminal, notifications are sent only to other connected terminals, not to all possible devices in the network. This targeted approach provides reliable information to affected users while minimizing unnecessary network traffic to terminals not involved in the call.
3Ease of operation
If the gateway notifies all terminals of every call status change, then all users have real-time information, but terminals involved in active calls may receive disruptive notifications
Solution Approach 1:
The system inverts the notification logic by excluding terminals involved in active calls from receiving notifications about those same calls. Instead of notifying all terminals universally, the gateway identifies which terminals are currently engaged in calls and excludes them from notification recipients. This prevents terminals from receiving contradictory or disruptive notifications during active communications while still providing real-time status information to terminals that are free to initiate calls.
Data Source
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AI summary
The invention relates to a call notification method involving a terminal connected to a domestic gateway, the establishment of said call involving passage of a signaling flow through said domestic gateway, said method comprising a step (E1) for receiving a message for signaling acceptance of said call. The method is characterized in that it comprises the steps of: - predetermining (E2) at least one terminal connected to said domestic gateway and not involved in said call, and - sending (E3) a message for notifying a call in progress to said at least one terminal.