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The block download method corresponding to the double-layer cache architecture

A caching and two-layer technology, which is applied in image communication, selective content distribution, electrical components, etc., can solve the problem of unable to apply mobile user objects, etc., to reduce energy consumption of access response, improve utilization rate, and extend retention time Effect

Active Publication Date: 2020-12-29
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of caching strategy is mainly for data requests of fixed-location users, and cannot be applied to mobile user objects

Method used

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  • The block download method corresponding to the double-layer cache architecture
  • The block download method corresponding to the double-layer cache architecture
  • The block download method corresponding to the double-layer cache architecture

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Embodiment Construction

[0078] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0079] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features that are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0080]Embodiment 1 discloses a two-layer cache architecture, including an edge node layer and its upper layer: a second-level node layer; the upper layer of the second-level node layer is a backbone network; the second-level node layer includes several second-level nodes, and the edge node The layer contains several edge nodes; each second-level node includes several edge nodes; each second-level node and each edge node is equipped with a cache device; each second-le...

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Abstract

The invention discloses a method for downloading blocks corresponding to a double-layer cache architecture. The double-layer cache architecture includes an edge node layer composed of several edge nodes and a secondary node layer composed of several secondary nodes on it. The secondary nodes and The edge nodes are respectively equipped with cache devices, and the secondary nodes are used to cache complete popular files. Through the probabilistic cache deployment strategy, the files are divided into several data blocks and deployed to the lower edge nodes for caching. The user end sends a file request to the corresponding edge node, so that the corresponding secondary node deploys the data block to the corresponding edge node for caching. After the data block is downloaded, the database is marked, erased, and reset according to the feedback from the user end. Write. Applied to video file caching, popular video files can be cached to the second-level node layer in advance, and the corresponding video files can be deployed to the corresponding RSU in the form of a database when a request is received. The invention can greatly shorten the download delay.

Description

technical field [0001] The invention relates to the field of data cache, in particular to a double-layer cache architecture, a corresponding block download protocol and an application in video file cache. Background technique [0002] The popularity of mobile Internet technology is coming to an end, and the increasing number of mobile networking terminal devices and explosive Internet content put forward higher requirements for mobile Internet. Research predicts that monthly mobile data traffic will reach 49 exabytes in 2021, accounting for 20% of total IP traffic, while 78% of global mobile data traffic will be video files. At the same time, with the development of high-speed railways and the concept of Internet of Vehicles, the mobility of users has been greatly improved, posing new challenges to the traditional mobile Internet. To cope with the existing and upcoming problems of the mobile Internet, edge caching, as a countermeasure against the growth of network traffic, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/231H04N21/262H04N21/25H04N21/238H04N21/466
CPCH04N21/23106H04N21/238H04N21/251H04N21/26208H04N21/4667
Inventor 李可吕兆延邢焕来
Owner SOUTHWEST JIAOTONG UNIV
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