Signaling Layer Control for Direct Media Stream Routing
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Solution Overview
Problem
In traditional communication networks, media stream circuitry issues due to address domain differences and network interconnectivity uncertainties lead to increased transmission delays and reduced media stream service quality, especially when users roam across different networks.
Innovation Solution
A communication method and device that utilize signaling layer control function entities to determine direct interconnectivity between bearer networks, thereby avoiding unnecessary network address port translations (NAPT) by routing session signaling and indicating subsequent entities to skip media layer gateway interactions when direct interconnection is possible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NAPT gateways are used for translation between different address domains, then media stream connection can be established between terminals in different networks, but media stream circuitry occurs and transmission delay increases
Solution Approach 1:
The patent applies preliminary action by performing inter-connectivity detection during the session establishment phase. The signaling layer control function entity detects whether bearer networks can be directly interconnected before the media stream is routed, and based on this detection result, determines whether to establish direct media connection or route through NAPT gateways. This preliminary detection prevents unnecessary circuitry before it occurs.
Solution Approach 2:
The patent introduces an intermediary detection mechanism where the signaling layer control function entity acts as a mediator between the media layer gateway function entity and the actual media stream path. This intermediary performs inter-connectivity detection and uses the results to control whether media streams pass through NAPT gateways, thereby eliminating unnecessary circuitry while maintaining connection reliability.
2Adaptability or versatility
If media stream passes through multiple NAPT gateways for translation, then communication between terminals in different address domains is enabled, but service quality deteriorates due to circuitry
Solution Approach 1:
The patent performs preliminary inter-connectivity detection during session establishment to determine the optimal media stream path before actual communication begins. By detecting whether direct interconnection is possible in advance, the system can establish direct media paths when available, avoiding the service quality deterioration caused by multiple NAPT gateway translations.
Solution Approach 2:
The patent implements dynamic path selection where the media stream routing is not fixed but adapts based on the inter-connectivity detection results. The signaling layer control function entity dynamically determines whether to use direct connection or NAPT gateway translation based on real-time network conditions and detected inter-connectivity, thereby optimizing service quality while maintaining cross-network communication capability.
3Device complexity
If traditional session establishment model binds media connection with signaling procedure, then session control is simplified, but media stream must return to original location causing circuitry
Solution Approach 1:
The patent segments the session establishment process into independent components: signaling establishment and media connection establishment. The signaling layer control function entity handles signaling procedures while separately performing inter-connectivity detection for media paths. This segmentation allows media streams to be routed directly based on detection results without being bound to the signaling path, eliminating circuitry caused by mandatory return trips to original locations.
Solution Approach 2:
The patent performs preliminary inter-connectivity detection during the signaling phase to determine the optimal media path before media streams are established. This preliminary action allows the system to plan direct media paths in advance, preventing the need for media streams to return to original locations and causing circuitry, while keeping session control relatively simple through the signaling function entity.
Data Source
AI summary
A communication method and device for preventing the media stream circuitry. The method includes the following steps: a signaling layer control function entity at the calling party side obtains the called party side information; the signaling layer control function entity routes the session signaling and controls the establishment of the media stream path, and when the signaling layer control function entity determines that the network where it is located can be inter-connected directly with the network where the called party is located according to the called party side information, the signaling layer control function entity gives up the interaction with the media layer gateway function entity for the network address port translation. A network device for guaranteeing that the communication between media layers of the calling and called party communication entities can be performed in the shortest path is also provided.