Multi-hop Content Delivery via Terminal Relaying
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Solution Overview
Problem
Conventional content delivery systems for digital signage terminals are inefficient, requiring a long time to deliver large amounts of content, leading to increased energy consumption and personnel costs, especially when direct connections are not possible, and are prone to communication disruptions.
Innovation Solution
A content delivery system utilizing a delivery server that instructs connected terminal devices to relay content to other devices in multiple stages via radio communication, reducing the number of links and enabling efficient delivery even in cases of link failures by using multicasting and parallel delivery processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If content is delivered sequentially one by one to digital signage terminals, then delivery is simple to implement, but delivery time becomes excessively long for large amounts of content
Solution Approach 1:
The patent segments the content delivery process into multiple parallel delivery paths. Instead of delivering content sequentially through a single path, the system divides content into multiple segments and delivers them simultaneously through different terminal devices, dramatically reducing total delivery time while maintaining implementation simplicity
Solution Approach 2:
The patent merges multiple delivery paths and terminal devices into a coordinated parallel delivery system. Multiple terminals work together simultaneously to deliver different content segments, combining their capabilities to achieve faster overall delivery compared to sequential single-path delivery
2Use of energy by moving object
If content delivery is performed after store hours to avoid interference, then energy consumption is reduced, but power supply cannot be turned off and personnel costs are wasted
Solution Approach 1:
The patent implements periodic content delivery during off-peak hours when digital signage terminals are not actively displaying content. By delivering content periodically during these idle periods rather than continuously or only after store hours, the system reduces energy consumption while avoiding the waste of keeping power supplies and personnel idle
Solution Approach 2:
The system performs content delivery automatically during idle periods without requiring manual intervention or continuous monitoring. The delivery server autonomously identifies appropriate delivery windows and executes content transfer, eliminating the need for personnel to remain on standby and allowing power supplies to be turned off completely during non-delivery periods
3Adaptability or versatility
If multi-hop communication technology is used to extend communication distance, then installation flexibility is improved, but the number of links increases and delivery time increases
Solution Approach 1:
The patent performs preliminary content delivery to intermediate terminal devices that are strategically positioned within radio communication range of the delivery server. These terminals pre-store content before it needs to be relayed further, reducing the number of active communication links required during actual content distribution and minimizing delivery time while maintaining installation flexibility
Data Source
AI summary
A content delivery system which comprises a delivery server and multiple terminal devices, the delivery server delivering content, the multiple terminal devices receiving delivery of the content, in the content delivery system connection between the delivery server and the terminal devices and connection between the terminal devices being made by radio, in the content delivery system the terminal devices being connected in multiple stages, wherein the delivery server instructs a terminal device which has received delivery of the content and which is connected to an other terminal device at the next stage to deliver content possessed by a self terminal device to the other terminal device, and wherein the instructed terminal device delivers content possessed by the self terminal device to the other terminal device and notifies the delivery result to the delivery server.