SIP User Agent Armed Directives for VoIP Signaling
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Solution Overview
Problem
Current SIP infrastructure requires resource-intensive back-to-back user agents (B2BUA) for core signaling, leading to latency, scalability issues, and increased complexity, making it difficult to deploy features efficiently and effectively manage call flows and conditions such as call disconnection, recording, and billing.
Innovation Solution
Implementing armed rich endpoint directives using SIP messaging, such as Refer messages, allowing SIP User Agents to perform operations independently when specific conditions are met without relying on B2BUA, enabling distributed intelligence and reducing the need for centralized applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If back-to-back user agents (B2BUA) are used for core signaling, then call flow management and feature invocation are enabled, but system complexity and resource consumption increase
Solution Approach 1:
The patent extracts the B2BUA component from the core signaling path and replaces it with endpoint-based event detection and armed directive execution. The core network no longer needs to host complex B2BUA applications, reducing centralized complexity while maintaining feature capabilities through distributed endpoint intelligence.
Solution Approach 2:
Endpoints are equipped with the capability to detect events and execute armed directives autonomously without requiring B2BUA intervention. The endpoint monitors its own media and signaling, triggering actions locally when conditions are met, eliminating the need for resource-intensive centralized applications.
2Reliability
If B2BUA applications continuously monitor call signaling, then real-time feature detection is achieved, but latency increases
Solution Approach 1:
The monitoring function is extracted from the core B2BUA and relocated to the endpoint itself. The endpoint monitors its own media and signaling locally, eliminating the need for traffic to traverse through centralized monitoring applications, thereby reducing latency while maintaining real-time detection capability.
Solution Approach 2:
The system uses armed directives that are prepared in advance but only executed when specific triggering conditions occur. This allows the endpoint to be ready for immediate action when needed without continuously processing through B2BUA, reducing unnecessary processing time and latency during normal operation.
3Adaptability or versatility
If centralized core applications are developed for SIP features, then feature functionality is provided, but deployment time increases
Solution Approach 1:
Instead of developing centralized core applications and pushing features down to endpoints, the approach is inverted: endpoints are equipped with universal capabilities to detect events and execute armed directives. This allows features to be deployed by configuring endpoint behavior rather than developing and deploying complex centralized applications, significantly reducing deployment time.
Solution Approach 2:
The endpoint is designed with universal capabilities to handle multiple feature types through armed directives (e.g., event detection, media monitoring, action execution). This multi-functional endpoint design eliminates the need for separate specialized applications for each feature, enabling rapid deployment of various SIP features without developing new core applications.
4Ease of operation
If B2BUA applications forward call signaling, then call flow control is maintained, but feature failure risk increases
Solution Approach 1:
The call flow control function is extracted from B2BUA and relocated to the endpoint. The endpoint directly monitors its own media and signaling and executes actions autonomously, eliminating the intermediary B2BUA layer that could potentially break or fail features. This direct endpoint-based approach simplifies the call flow path and reduces failure points.
Data Source
AI summary
System and method to perform a directive by a first SIP User Agent (UA) engaged in a peer-to-peer communication session with a second SIP User Agent (UA), the method including: arming the first SIP User Agent (UA) to define the directive; setting a trigger condition in the first SIP User Agent (UA) to perform the directive if the trigger condition becomes true; monitoring, by use of a processor within the first SIP User Agent (UA), for the trigger condition in the communication session; and if the trigger condition becomes true, performing by use of a processor the directive without usage of a back-to-back user agent.