Virtual Resource Locator for Dynamic CDN Selection
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Solution Overview
Problem
Current content delivery networks (CDNs) face challenges in efficiently distributing large, time-sensitive content like video files, as clients often do not receive content from the most appropriate source or bitrate, leading to suboptimal viewing experiences due to uncorrelated and correlated quality issues.
Innovation Solution
Implementing a Virtual Resource Locator (VRL) protocol that enables dynamic source assignment based on network partitioning, allowing content management systems (CMS) to direct clients to the best available CDN and bitrate by aggregating performance data from similar clients, ensuring optimal content delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If content is distributed through multiple CDNs without dynamic source assignment, then content availability is improved, but content delivery quality deteriorates due to clients not receiving content from the most appropriate source
Solution Approach 1:
The system dynamically selects content sources and bitrates based on real-time network conditions and client characteristics. The VRL protocol enables runtime decision-making about which CDN to use, transforming the static content delivery into a dynamic adaptation process that responds to changing network conditions, thus resolving the contradiction between availability and delivery quality.
Solution Approach 2:
The system changes multiple parameters simultaneously including source selection (which CDN), bitrate selection, and routing decisions. By adjusting these parameters based on aggregated performance data and network conditions, the system optimizes content delivery quality while maintaining availability across multiple sources.
2Device complexity
If a single CDN is used for content delivery, then system complexity is reduced, but delivery quality and adaptability to different network conditions deteriorates
Solution Approach 1:
The VRL protocol acts as an intermediary layer between the client and multiple CDNs. It aggregates performance data from various sources and makes intelligent routing decisions, allowing the system to leverage multiple CDNs for adaptability while keeping the client-side complexity low through a standardized protocol interface.
Solution Approach 2:
The system implements feedback loops by aggregating performance data from previous content deliveries and using this information to inform future source selection decisions. This feedback mechanism enables the system to adapt to different network conditions automatically without requiring complex client-side logic.
3Power
If content is delivered without dynamic bitrate selection, then processing overhead is reduced, but viewing quality deteriorates due to clients not receiving the most appropriate bitrate
Solution Approach 1:
The system performs preliminary actions by pre-aggregating performance data from multiple clients and pre-determining optimal source and bitrate selections before actual content delivery. This advance preparation reduces real-time processing overhead while ensuring high viewing quality through informed decisions about which bitrate to deliver.
4Productivity
If performance data from multiple clients is aggregated for source selection, then delivery optimization is improved, but data processing complexity increases
Solution Approach 1:
The VRL protocol serves multiple functions simultaneously: it collects performance data, aggregates information from multiple clients, makes source selection decisions, and provides routing instructions. This multi-functionality consolidates what would otherwise be separate complex processes into a unified protocol, improving delivery optimization while managing data processing complexity through standardized operations.
Data Source
AI summary
Directing a content player to a content source is disclosed. A message from a content management system including information associated with a client that is currently requesting content is received. Based at least in part on the information included in the message, a set of content sources is determined. Instructions indicating the set of content sources for the client are sent to the content management system.