SIP Soft Switch Local Media Delivery Bandwidth Conservation
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Solution Overview
Problem
Conventional remote hosted IP PBX systems for telephony services consume high bandwidth due to shared media delivery, leading to compromised services during peak periods and unsustainable loads on bandwidth resources.
Innovation Solution
A system that utilizes a SIP-enabled soft switch and local media servers to determine and serve media services locally, reducing the reliance on shared bandwidth by altering packet data to indicate local media provision for telephony sessions, thereby preserving bandwidth without impairing service quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If media services are delivered over shared bandwidth channels, then telephony services can be provided remotely, but bandwidth consumption becomes unsustainable during peak periods
Solution Approach 1:
The patent segments media delivery by identifying specific telephony session states (ringing, held, conference) that require media and delivering those media locally at the destination rather than over shared bandwidth. This segmentation isolates only the necessary media events for local processing while maintaining remote service capability.
Solution Approach 2:
The patent introduces a local media server at the destination that acts as an intermediary between the remote telephony service and the end user. This local server receives session state information, determines when media is needed, and delivers media locally without requiring continuous shared bandwidth allocation.
2Device complexity
If all telephony media are delivered centrally, then service management is simplified, but local bandwidth requirements are not met and service quality degrades
Solution Approach 1:
The patent implements local quality by enabling destination systems to autonomously determine and deliver media locally based on their specific session state requirements. Each destination system adapts media delivery to its local needs, improving service quality and reliability during peak periods when shared bandwidth is constrained.
Solution Approach 2:
The patent applies preliminary action by having destination systems pre-identify which telephony session states require media (ringing, held, conference states) and prepare local media delivery capabilities in advance. This allows the system to respond reliably to media requests without real-time bandwidth negotiation.
3Ease of manufacture
If shared bandwidth is used for media delivery, then infrastructure cost is reduced, but service becomes compromised during outages and peak periods
Solution Approach 1:
The patent changes the operational parameter of media delivery from centralized continuous delivery to localized event-driven delivery. By changing how and when media is delivered (only when specific session states are detected), the system maintains infrastructure simplicity while achieving reliability during outages and peak periods.
Data Source
AI summary
A Session Initiation Protocol (SIP) service system includes a SIP-enabled soft switch at a telephony service provider, executing code from a coupled machine-readable medium, routing SIP transactions to remote destinations, a media server coupled to the SIP-enabled soft switch storing media including ring tones and music-on-hold for use in progressing transactions, and an interface to a wide-area-network (WAN) for transmitting transactions and media. The SIP-enabled soft switch determines for each transaction from stored data whether media services are to be provided or not provided for that destination, and in the event media services are not to be provided, alters packet data to indicate media services to be provided by a server local to the destination.