HD Video Telephony Configuration via SMS and SIP Extension
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Solution Overview
Problem
Conventional UPnP telephony systems limit video communication to low-definition images when used between TVs, experiencing image distortion and inability to support HD video transmission due to bandwidth constraints in 3G/LTE networks, and filtering of additional SIP fields by conventional SIP servers.
Innovation Solution
An apparatus and method for configuring HD call connections between computer devices using SMS modules for device list information exchange and Control Points to select and establish telephony devices for HD video communication, enabling HD image transmission and filtering avoidance through SMS or REST messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional UPnP telephony is used for video communication between TVs, then device compatibility and ease of operation are improved, but video quality deteriorates to low-definition with image distortion
Solution Approach 1:
The system segments the communication protocol into two parts: standard UPnP telephony for device discovery and control (maintaining compatibility), and an extended field in SIP messages for HD video parameter negotiation. This allows the system to maintain ease of operation through standard UPnP while enabling high-definition video quality through the extended protocol segment.
Solution Approach 2:
The patent embeds additional SIP field information within the existing UPnP telephony framework. The extended SIP message fields are nested within the standard SIP protocol structure, which itself is nested within the UPnP telephony system. This nested structure allows HD video capabilities to be incorporated without disrupting the outer layers of device compatibility and ease of operation.
2Adaptability or versatility
If 3G/LTE network bandwidth is used for video transmission, then mobile network coverage is improved, but transmission capacity deteriorates causing inability to support HD video
Solution Approach 1:
The system changes the parameter of video resolution from standard definition to high definition by negotiating HD capabilities through extended SIP fields. The patent modifies the transmission parameters (video resolution, bitrate) dynamically based on network conditions and device capabilities, allowing HD video transmission when sufficient capacity is available while maintaining adaptability to various network environments including 3G/LTE.
3Adaptability or versatility
If additional SIP fields are added for HD video negotiation, then video communication capability is improved, but compatibility with conventional SIP servers deteriorates due to filtering
Solution Approach 1:
The patent introduces an intermediary mechanism where the control point acts as a mediator between devices with HD capabilities and conventional SIP servers. The control point translates and negotiates the extended SIP fields, converting HD video negotiation parameters into formats that conventional servers can handle, thus maintaining compatibility while enabling enhanced video communication capability.
Solution Approach 2:
Instead of requiring conventional SIP servers to accept and process extended HD fields (which causes filtering), the patent inverts the approach: the extended fields are used for negotiation between capable devices, and the final signaling to conventional servers uses only standard SIP fields. This inversion allows HD capability establishment without breaking compatibility with servers that filter unknown fields.
4Productivity
If direct device connections are established for HD video, then transmission efficiency is improved, but device complexity increases requiring SMS modules and control points
Solution Approach 1:
The patent implements multi-functionality in the control point, which performs multiple roles: device discovery, capability negotiation, HD parameter translation, and call management. By consolidating these functions into a single control point component, the system achieves direct device connections for efficient HD video transmission without proportionally increasing overall device complexity, as the control point serves universal purposes across multiple communication tasks.
Data Source
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AI summary
An apparatus for configuring a high-definition (HD) call connection between computer devices includes a Short Messaging Service (SMS) transceiving module for receiving a message for requesting home network telephony device list information of a first device, discovering a device in the home network to generate the telephony device list information, transmitting response message comprising the generated telephony device list information to the first device, receiving an SMS call connection request message from the first device, and transmitting an SMS call connection response message to the first device, and a Control Point (CP) for selecting a telephony device for receiving and initiating the call.