VOD Server Multicast Grouping for Bandwidth Conservation
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Solution Overview
Problem
Video-on-demand (VOD) systems face challenges in minimizing content download latencies and managing bandwidth efficiently, especially when end-users want to share video content with friends, leading to increased bandwidth requirements and potential delays.
Innovation Solution
A method that utilizes social networking information to conserve bandwidth by proactively delivering VOD content to users and their social networking friends who share a common distribution node, allowing for multicast distribution without additional access network resources, thus reducing load and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If VOD content is delivered to multiple users through individual unicast connections, then each user can access content independently, but bandwidth consumption increases linearly with the number of requests
Solution Approach 1:
The patent merges multiple unicast content delivery streams into a single multicast stream when multiple users within the same broadcast domain request the same VOD content. The system detects overlapping content requests from different users and consolidates them into one multicast transmission, thereby reducing bandwidth consumption while maintaining reliable content delivery to all requesting users simultaneously
2Loss of energy
If multicast distribution is used to conserve bandwidth, then bandwidth efficiency improves, but additional network configuration and management complexity increases
Solution Approach 1:
The system implements self-service mechanisms where client devices automatically detect and join appropriate multicast groups for VOD content delivery without requiring manual network configuration. The set-top boxes autonomously monitor for content requests, determine when multicast is appropriate, and participate in multicast group formation, thereby reducing the operational complexity of managing multicast distributions while maintaining bandwidth efficiency
3Loss of time
If VOD content is downloaded to client devices, then viewing can begin immediately, but local storage requirements increase
Solution Approach 1:
The patent combines the benefits of both download and streaming approaches by enabling clients to receive VOD content through multicast distribution. This allows content to be delivered efficiently to multiple clients simultaneously without requiring each client to store complete content locally, as the multicast stream provides continuous access to the content stream for all participating clients
Data Source
AI summary
A method is disclosed for using social networking information to conserve bandwidth in a video-on-demand (VOD) system operated by a service provider. In a VOD server system, a request for a VOD content item is accepted from a first client system associated with a user of the VOD system. A list of social networking friends of the user is obtained. A node-sharing group of the list of social networking friends is determined. The node-sharing group includes the first client system and zero or more client systems sharing a distribution node of the VOD server system with the first client system. A video delivery start message is sent through the shared distribution node to each client system in the node-sharing group.