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Method and system for mobile edge caching by jointly considering user preferences and activity degrees

A user-level technology, applied in the field of mobile edge caching that jointly considers user preferences and activity levels, can solve problems such as user preference differences

Active Publication Date: 2020-11-06
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual scenarios, there are obvious differences in user preferences

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  • Method and system for mobile edge caching by jointly considering user preferences and activity degrees
  • Method and system for mobile edge caching by jointly considering user preferences and activity degrees
  • Method and system for mobile edge caching by jointly considering user preferences and activity degrees

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Embodiment Construction

[0047] The invention discloses a mobile edge caching method and system that jointly considers user preference and activity level, which will be described in detail below.

[0048] 1. System model

[0049] Such as image 3 As shown, there is a central base station and K uniformly distributed intelligent terminal users in the cell, and the user set is U={u 1 ,u 2 ,...,u K}, all users can perform both cellular communication and D2D communication with the base station to achieve data sharing. Time is divided into T time periods, ie t=1, 2, . . . , T, where each time period has the same size and T is sufficiently large. In order to facilitate interference management, it is assumed that the maximum distance at which all users can perform D2D communication is R D , then in the tth time period, the user u can k The user set for D2D communication is u m ∈ U k,t ={u m ∈U|||u m -u k ||≤R D}, while assuming that D2D communication uses orthogonal frequencies to avoid co-channel...

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Abstract

The invention provides a method and system for mobile edge caching by jointly considering user preferences and activity degrees. The method comprises a content delivery step, an information exchange step and a content placement step. The beneficial effects of the method and the system are that: according to the cache system designed by the invention, the dependence of a traditional D2D cache system on a central base station or a cloud controller is reduced; the active degree of the user in the next time period is predicted by adopting the sliding window method, and each user can perform more accurate content placement according to the prediction result and the user preference of the active user in the cache placement stage, so that the D2D cache hit rate can be effectively improved. Besides, if the prediction result shows that no active user exists around a certain user in the next time period, the user can skip the cache placement stage, and then the traffic load generated by cache updating on the base station can be reduced.

Description

technical field [0001] The present invention relates to the field of mobile communications, in particular to a method and system for mobile edge caching that jointly considers user preference and activity level. Background technique [0002] In recent years, with the rapid development of mobile Internet and related industries, wireless traffic has shown explosive growth. The wireless network needs to carry massive data transmission, and the backhaul link will become the bottleneck of the entire network. Cisco's latest report shows that by 2022, global mobile traffic is expected to reach 77EB per month, a 7-fold increase in mobile traffic compared to 2017, and mobile data traffic will grow at a compound annual growth rate of 46% from 2017 to 2022 The rapid growth of wireless traffic demand will bring enormous pressure to the current wireless network. Take a video file as an example, such as figure 1 As shown, the statistical results obtained by the team of Academician Li K...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04W4/70G06F16/9535
CPCH04W4/70G06F16/9535H04L67/535H04L67/568Y02D30/70
Inventor 罗晶晶戚雨龙高林郑福春张钦宇
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL