SIP Protocol Fields for Real-Time Multimedia Session Renegotiation
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Solution Overview
Problem
Existing multimedia session protocols, such as SIP, face limitations in real-time renegotiation of session quality and efficient use of network infrastructure, particularly in supporting additional information exchange beyond standard data channels.
Innovation Solution
A method that allows for the selection and use of additional data exchange channels at an application level within the SIP protocol, enabling real-time renegotiation of multimedia session quality by transmitting additional information through contextual fields, such as the SIP header, Call_ID, and SDP payload, without altering the intrinsic operation of the signaling protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional information is transmitted through existing SIP protocol fields, then real-time service adjustments and quality renegotiation are enabled, but the protocol structure and complexity increase
Solution Approach 1:
The patent applies multi-functionality by enabling existing SIP protocol fields (header, Call_ID, SDP payload) to serve dual purposes: their original signaling functions plus additional information exchange for quality renegotiation. This allows the same protocol structure to handle both standard session management and real-time service adjustments without requiring separate dedicated channels or protocols.
Solution Approach 2:
The patent changes the parameter usage of existing SIP fields by injecting additional information into contextual fields that were previously used for standard signaling. By modifying how these fields are populated and interpreted, the system enables real-time quality renegotiation while maintaining compatibility with the original protocol structure.
2Reliability
If standard SIP data channels are used for information exchange, then protocol compatibility is maintained, but real-time quality renegotiation and additional information transmission are limited
Solution Approach 1:
The patent makes the standard SIP data channels multi-functional by enabling them to carry both traditional signaling information and additional application-specific data. The same channels that maintain protocol compatibility are simultaneously used for real-time quality renegotiation, eliminating the need for separate dedicated information exchange channels.
Solution Approach 2:
The patent merges the function of standard signaling channels with additional information exchange capabilities. By combining quality renegotiation data with regular SIP signaling in the same protocol fields, the system achieves both protocol compatibility and enhanced information exchange capability through a unified channel structure.
3Adaptability or versatility
If new protocols or channels are created for additional information exchange, then real-time renegotiation capability is improved, but network infrastructure complexity and deployment difficulty increase
Solution Approach 1:
The patent avoids creating new protocols by making existing SIP infrastructure multi-functional. The same SIP channels and fields that are already deployed worldwide are used for both traditional signaling and real-time quality renegotiation, eliminating the need for new protocol development and deployment while achieving enhanced renegotiation capabilities.
Solution Approach 2:
The patent enables the existing SIP protocol to serve itself by allowing it to carry additional information within its own structure. The protocol uses its existing fields (header, Call_ID, SDP payload) to transport quality renegotiation data, making the system self-sufficient and avoiding dependency on external new protocols or infrastructure.
Data Source
AI summary
The method allows communications means to be listed, for end-to-end broadcasting of information other than that required for managing multimedia sessions. After a selection (52) of communications channels through an infrastructure for managing multimedia sessions, the method provides via the application level, the establishment of a communication specifically using the selected communications channel(s). Purely descriptive/explanatory fields of characteristics of a session may be selected at an application level and used for conveying additional information in addition to the signaling protocol. It is thus possible to change the conditions for consuming/using the multimedia contents or the established flux. Instantaneity of the services and service use conditions may be obtained by requesting for example renegotiation in real time of a service when the conditions of use are modified (iconification of a TV/Video streaming flux in order to reduce the bandwidth used).