Address Translation Table Maintenance in VoIP Networks
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Solution Overview
Problem
Current methods for maintaining address translation tables in VoIP networks generate excessive signaling message traffic and require specific functions in collection units, leading to increased operational costs and complexity.
Innovation Solution
A device intercepts registration requests in VoIP networks, verifies the existence of specific entries in the address translation table, and creates or updates entries with validity indications based on the registration period, eliminating the need for artificial signaling messages by synchronizing the table with the actual registration validity period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If artificial signaling messages are forced to maintain address translation tables, then the tables remain up to date, but excessive message traffic is generated in the access network
Solution Approach 1:
The patent extracts the essential function of table maintenance from the artificial signaling mechanism. Instead of forcing periodic signaling messages, the system only processes actual registration requests from terminals, eliminating the need for artificial traffic generation while maintaining table accuracy.
Solution Approach 2:
The address translation table maintenance is made self-service by automatically processing genuine registration requests from terminals. The system leverages the terminals' own registration signaling to update tables, rather than requiring external artificial signaling to force updates.
2Reliability
If specific functions are introduced in collection units to generate artificial traffic, then table maintenance is achieved, but device complexity increases
Solution Approach 1:
The patent removes the complex artificial traffic generation functions from collection units. By extracting this unnecessary functionality, the system achieves table maintenance through simple processing of actual registration requests, significantly reducing device complexity.
Solution Approach 2:
Collection units no longer need special functions to generate artificial traffic. The system uses the terminals' own registration signaling to maintain tables, making the collection units simpler and eliminating the need for complex traffic generation mechanisms.
3Quantity of substance
If registration requests are intercepted and processed, then unnecessary signaling is eliminated, but processing overhead increases
Solution Approach 1:
The patent applies partial action by intercepting and processing only the necessary registration requests from terminals, rather than generating excessive artificial signaling. This selective processing reduces overall message traffic while maintaining essential table update functionality.
Data Source
AI summary
A device for maintaining an address translation table, placed in series between a user terminal and a third-party entity of a telecommunications network, is disclosed. The device is adapted to verify the existence in the address translation table of an entry specific to the exchange of application signaling messages using said protocol between the terminal and the third-party entity and, if there is no entry specific to the exchange of application signaling messages using said protocol between the terminal and the third-party entity, to create a specific entry in the address translation table associating with a private address and a private port of the terminal in a private network connecting it to said device a public address and a public port of the terminal in the telecommunications network and an indication of the validity of the entry, this validity indication taking into account the first reception time.