Campus Content Distribution via Multicast IP and Satellite
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Solution Overview
Problem
Existing content distribution systems face challenges in supporting simultaneous high-quality video streaming to a large number of users, such as in a campus environment, where conventional networks become overwhelmed due to the limitations of bandwidth and device connectivity.
Innovation Solution
A system that receives satellite-broadcast content, transcodes it into multiple bit-rate options using protocols like HTTP Adaptive Streaming and Scalable Video Coding, and transmits these transcoded streams via multicast IP addresses to multiple access points, allowing electronic devices to stream content efficiently across a local area network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional IP-based streaming services are provided to multiple devices simultaneously, then content accessibility is improved, but network bandwidth is overwhelmed and service performance deteriorates
Solution Approach 1:
The patent segments video content into multiple bit-rate versions (e.g., high, medium, low quality streams) and distributes them through different delivery mechanisms. Satellite receivers provide high-quality streams to large screens, while IP network delivers lower-bitrate streams to mobile devices, allowing simultaneous service to multiple devices without overwhelming the network
Solution Approach 2:
The patent merges satellite broadcasting infrastructure with IP network distribution to create a hybrid content delivery system. The satellite receiver captures and decodes content, then redistributes it through both satellite (for large screens) and IP network (for mobile devices), combining the advantages of both delivery mechanisms to serve diverse devices simultaneously
2Productivity
If high bandwidth connections are provided to accommodate multiple simultaneous streams, then content streaming capability is improved, but network infrastructure complexity and cost increase
Solution Approach 1:
The patent changes the bit-rate parameter of content streams based on the destination device type. High-bitrate streams are directed to satellite receivers for large screens, while low-bitrate streams are delivered via IP network to mobile devices. This parameter adaptation allows efficient use of existing infrastructure without requiring high bandwidth for all streams
Solution Approach 2:
The satellite receiver acts as an intermediary that receives content via satellite, decodes it, and then redistributes it through multiple channels (satellite and IP network). This intermediary function allows the system to leverage existing satellite infrastructure while adding IP network distribution, avoiding the need to build entirely new high-bandwidth infrastructure
3Manufacturing precision
If content is transmitted at high bit-rate for quality, then viewing quality is improved, but network load increases and interruptions occur
Solution Approach 1:
The patent applies different quality levels to different viewing contexts. High-quality streams are provided to large screens in fixed locations via satellite, while lower-quality streams are delivered to mobile devices via IP network. Each device receives appropriate quality based on its capabilities and usage context, optimizing overall network efficiency
Solution Approach 2:
The system dynamically adapts stream quality based on device type and network conditions. Mobile devices receive lower-bitrate streams that are more tolerant of network variations, while fixed satellite receivers receive high-bitrate streams. This dynamic adaptation prevents interruptions by matching stream characteristics to device capabilities and network conditions
Data Source
AI summary
A predetermined set of channels from a satellite broadcast are received and tuned in parallel at a head end module of a local area network, which potentially serves a large number of users with electronic devices via multiple wired and/or wireless access points, such as at a college campus or a business center. Each channel of content is transcoded into multiple content streams providing multiple bit-rate options for each channel of content, e.g., using HTTP Adaptive Streaming protocols and/or Scalable Video Coding. The transcoded content streams are packetized and transmitted with respective multicast IP addresses to the access points on the local area network. Electronic devices connected to an access point are able to stream content from any one of the predetermined set of channels by joining one or more corresponding multicasts.