Media Gateway Control Protocol Service Change Duration Parameter
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Solution Overview
Problem
Current media gateway control protocols, such as H.248/Megaco, cannot effectively indicate the duration of a termination's service state after a state change, making it difficult for media gateways (MG) and media gateway controllers (MGC) to manage and control the termination's state post-change.
Innovation Solution
Incorporating a duration parameter into the ServiceChange command message, allowing MGs and MGCs to specify both the method and duration of service state changes, enabling precise control over the termination's state post-change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ServiceChange command message does not include a duration parameter, then the protocol structure remains simple, but the MGC and MG cannot effectively control or manage the termination's service state after state change
Solution Approach 1:
The patent adds a duration parameter to the ServiceChange command message structure. This parameter change enables the MGC and MG to specify and control the maintaining duration of service state changes, directly improving service state control capability while only minimally increasing message complexity
Solution Approach 2:
The patent introduces a time dimension (duration parameter) to the existing ServiceChange command message. This transforms the command from only specifying state change method to specifying both method and duration, enabling effective post-state-change control without fundamentally restructuring the message format
2Ease of operation
If a duration parameter is added to the ServiceChange command message, then the MGC and MG can precisely control the termination's service state duration, but the command message structure becomes more complex
Solution Approach 1:
The patent extends the ServiceChange command message by adding a duration parameter. This simple parameter addition significantly improves service state management capability, allowing operators to precisely control how long a termination remains in a changed state, while maintaining the overall simplicity of the message structure
Solution Approach 2:
The duration parameter allows the MGC to pre-specify the maintaining duration of service state changes in the ServiceChange command itself. This preliminary action eliminates the need for subsequent separate commands to manage state duration, simplifying overall operation despite the added parameter
Data Source
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AI summary
A method for responding to termination service state change indication is provided. The method includes: receiving a command message indicating a termination service state change, in which the command message at least includes a method parameter and a duration parameter, the method parameter indicates a change method of the service state, and the duration parameter indicates a maintaining duration of the service state after being changed; and changing the service state of the termination according to method parameter content information of the received command message, and maintaining the changed service state according to duration parameter content information of the received command message. Accordingly, a media gateway controller (MGC) and a media gateway (MG) of the termination service state change indication based on the media gateway control protocols are also provided. The termination service state change and the maintaining duration of the service state after being changed are indicated simultaneously, which is rather convenient for the MG or MGC to realize effective subsequent control on the termination after the service state change of the termination.