Gateway Controlling Device Media Negotiation Acceleration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a lack of standardized procedures for interworking between the H.324 protocol suite with Media Oriented Negotiation Acceleration (MONA) and the SIP protocol in split architecture, which hinders efficient multimedia call setup and media channel establishment between circuit-switched and Internet Multimedia Subsystem domains.
Innovation Solution
A gateway controlling device and media gateway device are configured to manage and repeat media oriented negotiation acceleration preference messages, handle media preconfigured and signalling preconfigured channel packet data units, and perform fallback to standard H.324 procedures when necessary, ensuring aligned H.245 handling and maintaining architectural work split between Media Gateway Control Function and Internet Multimedia Media Gateway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard H.324 procedures are used for multimedia call setup, then protocol compatibility is maintained, but call setup time increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring media channels and capabilities before actual call setup. MONA terminals exchange capability information and pre-establish media channel parameters in advance, so that when a call is initiated, the media channels are already prepared and can be activated immediately, avoiding the need for time-consuming H.245 capability exchange during call setup.
Solution Approach 2:
The patent segments the call setup process into two independent phases: capability exchange phase (using MONA preference messages) and media channel establishment phase (using accelerated H.245 procedures). This segmentation allows the capability exchange to occur separately from the actual media setup, enabling parallel processing and reducing overall call setup time while maintaining compatibility.
2Loss of time
If MONA procedures are used for accelerated call setup, then call setup time is reduced, but protocol complexity increases
Solution Approach 1:
The patent uses an intermediary approach by introducing MONA preference messages as a standardized interface between H.324 terminals and the H.245 protocol. These preference messages act as a mediator that carries capability information and media channel parameters in a structured format, simplifying the interaction between different protocol components and reducing the complexity of implementing accelerated procedures.
Solution Approach 2:
The patent applies universality by designing MONA preference messages that can handle multiple functions: capability negotiation, media channel configuration, and fallback control. This multi-functional approach consolidates what would otherwise require multiple separate protocol mechanisms into a single unified message type, reducing overall protocol complexity while maintaining acceleration benefits.
3Reliability
If H.245 signalling is used for media channel negotiation, then media channel establishment is achieved, but signalling time increases
Solution Approach 1:
The patent applies preliminary action by having MONA terminals exchange media channel parameters and capabilities in advance through preference messages. This pre-exchange of information allows the actual H.245 signalling to focus only on confirming pre-agreed parameters rather than negotiating everything from scratch, significantly reducing signalling time while maintaining reliable media channel establishment.
Solution Approach 2:
The patent uses partial action by selecting only the most critical media parameters for accelerated negotiation (such as codec types and channel numbers) while deferring detailed parameter negotiation to standard H.245 procedures. This partial approach achieves rapid media channel establishment for the most important aspects while maintaining flexibility for additional parameter negotiation when needed.
Data Source
AI summary
An apparatus is configured to send a message to a controller requesting that a media oriented negotiation acceleration preference message is to be sent repeatedly. The apparatus is further configured to provide the controller with media oriented negotiation acceleration preferences within that message which are to be advertised by the controller, and to request the controller to send a notification to the apparatus about receipt of the first media oriented negotiation acceleration preference message. The apparatus receives a notification from the controller about receipt of a media oriented negotiation acceleration preference message which firstly came in at the controller.