Direct Inward Dialing Number Selection for International Call Routing
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Solution Overview
Problem
Existing international calling systems often experience congestion and low-quality connections due to reliance on a single direct local or toll-free phone number for connecting wireless devices to international destinations.
Innovation Solution
A method and system that selects one of a plurality of direct inward dialing numbers to connect a wireless device to an international destination, balancing load and ensuring connection establishment through a server, thereby reducing congestion and improving call quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single direct local or toll-free phone number is used to connect wireless devices to international destinations, then the calling process is simple, but congestion occurs at the corresponding exchange resulting in failed or low-quality calls
Solution Approach 1:
The patent divides the single exchange connection into multiple parallel paths by assigning multiple direct inward dialing numbers to different exchanges. Each number provides an independent routing path, so when one exchange is congested, calls can be routed through other exchanges via different numbers, thereby maintaining call reliability while keeping the user interface simple.
Solution Approach 2:
The system dynamically changes the routing parameter by selecting different direct inward dialing numbers based on real-time exchange availability and load conditions. The wireless device or server selects the optimal number from the plurality of available numbers, adjusting the routing parameter to avoid congestion and ensure successful call connections.
2Reliability
If multiple direct inward dialing numbers are used to distribute load, then call connection reliability improves, but the system complexity increases
Solution Approach 1:
The system implements self-service by having the wireless device or server automatically select and dial the appropriate direct inward dialing number without requiring user intervention. The selection process is handled transparently in the background, where the system monitors exchange availability and automatically routes calls through the optimal number, maintaining reliability while hiding the complexity from the user.
Solution Approach 2:
The patent introduces a server as an intermediary component that manages the complexity of multiple direct inward dialing numbers. The server receives the international destination number, selects the appropriate direct inward dialing number from the plurality of available numbers, and initiates the call sequence. This intermediary handles the routing logic and exchange availability checks, reducing the complexity burden on the wireless device.
3Device complexity
If a single exchange is used for international calls, then the system is simple to manage, but congestion prevents successful connections
Solution Approach 1:
The patent segments the single exchange into multiple exchanges, each handling a portion of the international call traffic through separate direct inward dialing numbers. This segmentation distributes the call load across multiple exchanges, preventing any single exchange from becoming a bottleneck and thereby increasing the overall call connection success rate while maintaining manageable system complexity.
Solution Approach 2:
The system implements dynamic load distribution by continuously monitoring exchange availability and dynamically selecting which direct inward dialing number to use for each call. This dynamic approach allows the system to adapt to changing network conditions, routing calls to the most available exchange at any given time, thereby maximizing call connection success rates.
Data Source
AI summary
Selecting one of a plurality of direct inward dialing numbers for dialing an international number preceded by a direct inward dialing number is disclosed. A destination phone number to be dialed by a wireless device is initially received at the wireless device. It is then determined that the destination phone number is an international destination phone number. In response to the determination that the destination phone number is an international destination phone number, one direct inward dialing number is selected from among a plurality of direct inward dialing numbers. The selected one direct inward dialing number connects the wireless device to a server. Next, the wireless device dials the one selected direct inward dialing number and determines that a connection between the wireless device and the server has been established. Finally, the international destination phone number is forwarded to the server.