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An LT-code-based atomization caching method in a mobile edge computing network

An edge computing and caching technology, applied in network traffic/resource management, machine-to-machine/machine-type communication services, electrical components, etc. Cache effect, small memory effect

Active Publication Date: 2021-09-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Although the existing LT code-based encoding cache schemes have designed cache placement strategies, there is no description for the specific parameters of the encoding cache, especially the cache redundancy design

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  • An LT-code-based atomization caching method in a mobile edge computing network
  • An LT-code-based atomization caching method in a mobile edge computing network
  • An LT-code-based atomization caching method in a mobile edge computing network

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] see figure 1 , the concrete method of the present invention is as follows:

[0025] Step 1. Determine the cache file;

[0026] Since it is assumed that the probability that the user requests content obeys the Zipf distribution, then the probability that the i-th file is cached by the user is Existing studies have shown that α z The larger the value of , the higher the probability that the content with the higher i will be requested, that is, the more popular content is concentrated. alpha z The value of is generally between 0.2 and 1. According to the Zipf distribution, the request content is randomly predicted one by one, and the content that is about to be cached by the user to the edge of the network.

[0027] Step 2. Determine cache redundancy;

[0028] Suppose the file f is of size C f , divide the file f into k f packets, each of which has the sa...

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Abstract

The invention discloses an atomized caching method based on an LT code in a mobile edge computing network. The invention encodes a file to be cached through the LT code, and the file is fragmented and cached by an edge user device. Since the encoding package is small, the number of encoding packages cached by each user is small, and the memory occupied is small, which makes full use of the free memory of the device and improves the memory utilization rate of the system. The content requester can obtain the content cached by other users through D2D communication, and the user is both a content requester and a content provider, which fully embodies the sharing thinking in the Internet and improves memory utilization. The content of the present invention is stored in an atomized state at the edge of the network, the cached content is close to the content requesting user, and the content requesting user can obtain the requested file with a higher probability, thereby achieving better caching effect and improving user experience.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to an LT code-based atomization buffering method in a mobile edge computing network. Background technique [0002] The rapid increase in the number of communication devices and the surge in mobile data traffic have brought enormous pressure to mobile communication networks, resulting in increased network load, tight bandwidth resources, increased network delay, and poor user experience. Mobile Edge Computing (MEC) solves the above problems by migrating storage, computing, services, etc. to the edge of the network close to the user end. The caching technology in mobile edge computing can effectively alleviate the bandwidth pressure of the backhaul link and reduce the network delay by caching popular content at the edge of the network (such as edge server, user equipment, etc.). Compared with the content cache at the edge server, popular content is cached at the user...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W28/02H04L29/08
CPCH04W4/70H04W28/0278H04L67/568
Inventor 杜清河李艳阳
Owner XI AN JIAOTONG UNIV
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