SLAN Edge Caching for Video Latency Reduction
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Solution Overview
Problem
Current networking technologies face challenges in reducing latency, ensuring continuity, and managing bandwidth for video data transfer, particularly in the 'last mile' connection between network data centers and client devices, due to high costs and limited bandwidth, especially during peak times and in populated areas.
Innovation Solution
A Special Local Area Network (SLAN) is formed by connecting Wi-Fi access points to create a network that caches data locally, allowing for direct data transfer between nodes without relying on the internet, using point-to-point links and caching strategies to reduce latency and bandwidth demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If video data is transferred over the Internet through network data centers, then data delivery is achieved, but latency is high and bandwidth is limited especially during peak times
Solution Approach 1:
The patent implements preliminary action by caching video content in advance at edge nodes (access points) before actual user requests. The system pre-positions content closer to end users through distributed caching mechanisms, so that when video playback is requested, the data is already available locally rather than needing to be fetched from remote data centers during peak times, thereby reducing latency and improving transfer speed.
2Quantity of substance
If bandwidth is increased to handle peak times and large video data, then data transfer capacity improves, but cost increases significantly
Solution Approach 1:
The patent applies local quality by distributing caching capabilities to individual edge nodes (access points) rather than concentrating bandwidth capacity in centralized data centers. Each edge node maintains local caches that serve its specific geographic area, providing localized bandwidth capacity where needed without requiring expensive upgrades to the entire network infrastructure. This localized approach reduces overall cost while maintaining adequate capacity for peak demand.
Solution Approach 2:
The system uses copying by creating distributed replicas of video content across multiple edge nodes in the network. Instead of transferring large volumes of data through expensive high-bandwidth connections during peak times, the content is copied to and cached at multiple locations closer to users. This copying strategy reduces the need for expensive bandwidth capacity while ensuring content availability, thereby lowering costs while maintaining service quality.
3Loss of time
If content is cached at CDN edge nodes, then latency is reduced and bandwidth demands on the source server are lowered, but device complexity and network infrastructure requirements increase
Solution Approach 1:
The patent implements universality by designing edge nodes (access points) that perform multiple functions: they serve as both Wi-Fi access points for client devices and as caching nodes for video content. This multi-functionality eliminates the need for separate dedicated caching infrastructure, reducing device complexity while still achieving the latency benefits of content caching. The same hardware resources are utilized for both network access and content delivery functions.
Solution Approach 2:
The system merges the functions of content caching and network access by integrating cache memory and caching logic directly into existing Wi-Fi access points. This consolidation combines what would traditionally be separate components (caching infrastructure and network access infrastructure) into a single unified system, reducing overall device complexity and infrastructure requirements while maintaining the performance benefits of distributed caching.
Data Source
AI summary
A network arrangement and method for using the same are described. In one embodiment, the network arrangement comprises: a plurality of access points that are part of one or more existing networks and communicate with each other to form a local area network (LAN) to transfer data between two or more of the plurality of access points using point-to-point links independent of their function in the one or more first existing networks, wherein each access point of the plurality of access points is associated with a cache to store content that may be forwarded to other access points in the plurality of access points, where at least one of the access points is responsive to a request from an application being run on a client device to provide the content stored in one or more caches of access points in the LAN to the client device, the content being sent by the at least one access point through a wireless connection.