Media Format Information Supplementing Circuit for SIP Interconnection
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Solution Overview
Problem
Conventional SIP signal converters fail to facilitate media negotiation between endpoints with differing media formats, preventing successful interconnection in IP-based communications such as speech or video transmissions.
Innovation Solution
A connection control apparatus and method that includes a media format information storage and a media format information supplementing circuit, which verifies and supplements media format information in connection control signals to enable interconnection even when media formats differ, utilizing a media format converter to support common formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional SIP signal converters are used for interconnection, then basic connection control is achieved, but media negotiation fails when media formats differ between endpoints
Solution Approach 1:
The system performs preliminary media format conversion before connection establishment. The media format converter pre-converts media formats to ensure compatibility, and the connection control apparatus supplements media format information in advance, allowing media negotiation to succeed where conventional systems fail.
Solution Approach 2:
The connection control apparatus acts as an intermediary between endpoints with different media formats. It supplements media format information to connection control signals, enabling the media negotiation process to bridge the gap between incompatible endpoints and establish successful connections.
2Adaptability or versatility
If media format conversion is supported, then adaptability to different media formats is improved, but connection control complexity increases
Solution Approach 1:
The connection control apparatus is designed with multi-functionality, integrating both connection control and media format information supplementation capabilities. This universal design allows a single apparatus to handle both standard connection control tasks and specialized media format negotiation, avoiding the need for separate dedicated components.
3Reliability
If media format information is supplemented to all connection control signals, then media negotiation success rate improves, but information processing overhead increases
Solution Approach 1:
The system applies media format information supplementation selectively rather than universally. The connection control apparatus identifies specific connection control signals that require media format information based on the negotiation context, supplementing information only where necessary to resolve format incompatibilities while leaving other signals unchanged.
Data Source
AI summary
In an apparatus for connection control between two terminals, a communication unit transmits or receives a connection control signal to or from the terminals. A storage stores media format information usable on the two terminals, which are to be supplied with the media format information on media formats converted by a media format converter. A media format information supplementing unit references the media format information storage, based on the connection control signal received from the terminal, and verifies a possible presence of common media format information usable by the terminals to be interconnected. If there is no common media format information, predetermined media format information is supplemented to the connection control signal, and a resulting connection control signal is delivered to the communication device. Thus, media negotiation may be made even when media formats usable on the two terminals differ from each other.