Relay Base Station Data Fragment Caching for Mobile Network Scalability
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Solution Overview
Problem
The existing data distribution system for mobile bodies faces challenges with scalability as the number of mobile stations increases, leading to concentrated loads on the center server and potential degradation of service quality, and it requires changes to the existing contents distribution service operation, as well as inability to be applied to base stations without data storage functions.
Innovation Solution
A data distribution system that includes a mobile station with a cache generation instructing section to transmit download instructions for data fragments to a contents server and a distribution device with a cache generation section to store these fragments, allowing for distributed processing and scalability adjustments without altering the existing service operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the center server performs push distribution of data to base stations, then data can be distributed efficiently, but the load concentrates on the center server and service quality degrades when the number of mobile stations increases
Solution Approach 1:
The patent divides the centralized data distribution function into multiple distributed components. Base stations are segmented into different functional groups, with some serving as regular base stations and others as relay base stations that can forward data to mobile stations directly. This segmentation distributes the processing load away from the center server, improving service quality while maintaining distribution efficiency.
Solution Approach 2:
The patent introduces relay base stations as intermediary nodes between the center server and mobile stations. These relay base stations receive data from the center server and distribute it to mobile stations within their coverage area, acting as mediators that reduce the direct load on the center server while maintaining efficient data distribution.
2Productivity
If the center server and contents distribution server need to be connected for push distribution, then data can be distributed, but the operation of existing systems needs to be changed
Solution Approach 1:
The patent designs the relay base station to perform multiple functions: it serves as a regular base station for mobile stations in its coverage area, acts as a relay for data distribution from the center server, and can function as a contents distribution server. This multi-functionality allows the system to implement new data distribution capabilities without requiring separate dedicated infrastructure, minimizing changes to existing system operations.
3Productivity
If base stations with data storage function are used, then data can be cached and distributed, but the system cannot be applied to base stations without data storage functions
Solution Approach 1:
The patent implements a virtual caching mechanism where relay base stations create virtual copies of data in their memory structures without requiring permanent physical storage. The data is maintained in volatile memory and can be refreshed from the center server, allowing base stations without permanent storage capabilities to participate in the data distribution system while providing caching functionality.
Data Source
AI summary
A cache generation instructing section of a mobile station transmits, as a download instruction, an instruction that downloads a data fragment distributed to a mobile body when the mobile body is traveling in a communication area from a contents server. In addition, a cache generation section of a distribution cache node that manages data distribution in the communication area downloads the data fragment from a contents server based on the download instruction and stores the downloaded data fragment in a cache management database of a storage section as a cache.