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Cache placement and user access method and device in dynamic cellular network

A cellular network and access method technology, applied in the field of cache placement and user access methods and devices, can solve problems affecting user access, reduce user experience, and unrealistic systems, so as to improve user experience and reduce average transmission time Delay, reduce the effect of transmission delay

Active Publication Date: 2021-09-17
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the content cache placement and user access decisions are placed on the same time scale, the edge server needs to update the cached service frequently. Considering the memory capacity and bandwidth limitations of the edge server, it is unrealistic to update the service cache frequently and it will bring a negative impact on the system. To add extra burden, but also reduce the user experience
Secondly, the current location of the user determines the relative position between the base station and the user, that is, the signal-to-interference-noise ratio between the base station and the user, thus affecting the user access

Method used

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  • Cache placement and user access method and device in dynamic cellular network
  • Cache placement and user access method and device in dynamic cellular network
  • Cache placement and user access method and device in dynamic cellular network

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Embodiment 1

[0037] Such as figure 1 As shown, Embodiment 1 of the present application provides an apparatus 100 for cache placement and user access in a dynamic cellular network. The apparatus is deployed on a base station to optimize cache deployment and user access in the entire dynamic cellular network. The device specifically includes an information initialization processor 110, an optimal user access processor 120, a base station optimal cache allocation processor 130, and an optimization control processor 140; wherein:

[0038] The information initialization processor is connected with the optimal user access processor, and is used for system initialization. Among them, the system initialization is specifically: in the dynamic cellular network, according to the number of base stations and cacheable content, constructing a cache allocation instruction matrix, using random cache to obtain initial cache deployment information; constructing an access instruction matrix according to the ...

Embodiment 2

[0043] In order to effectively reduce the long-term content transmission delay in the dynamic cellular network, Embodiment 2 of the present application proposes a joint optimization method for cache placement and user access at multiple time scales, so as to alleviate the backhaul link pressure as much as possible and reduce system overhead. , to improve user experience.

[0044] Scenario assumption: In a communication network composed of multiple base stations equipped with buffer devices, there are M base stations distributed, and the set of base stations is denoted as M={1,2,...,M}; assuming that the buffer space of the base stations is uniformly denoted as sbits, use K={1,2,...,K} to represent the set of users, use Nn={1,2,...,N} to represent the set of user requested files, where the files requested by users can be obtained from the core network Obtained, the size of all content is fbits; the entire cache placement process is represented by a time sequence Tn={1,2,...,T},...

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Abstract

The invention discloses a cache placement and user access method and device in a dynamic cellular network. The method comprises the following steps: according to the number of base stations, the number of users and the number of cacheable contents in a cellular network, initializing cache placement and user access of the base stations in a random manner; user access information is obtained at a short time scale by using a belief propagation algorithm according to the base station distribution position and the cache placement information; according to the base station distribution position and the user access information, cache placement information is obtained in a long-time scale by using a depth deterministic policy gradient algorithm; and iterative computation is repeated to obtain final cache placement and user access information. By adopting the technical scheme of the invention, the cache placement and the user access are jointly optimized on the basis of introducing the cache in the cellular network, the average transmission delay can be reduced, and the user experience can be improved.

Description

technical field [0001] The present application relates to the technical field of cellular network communication, and in particular to a buffer placement and user access method and device in a dynamic cellular network. Background technique [0002] In recent years, with the popularity of mobile devices and the maturity of multimedia applications, mobile data traffic and content diversity have exploded, and the traditional network structure has been unable to adapt to such a fast-growing traffic. Research on content distribution technology for mobile Internet applications in cellular networks has become a hot topic. Aiming at the problems of network congestion and backhaul link overhead caused by the duplication of a large amount of data content generated by mobile Internet data content distribution, existing studies have proposed the concept of edge caching in cellular networks, which can avoid duplicate content on the backhaul link by caching hot content at the edge of the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/08H04W48/16H04W74/08
CPCH04W48/08H04W48/16H04W74/0833Y02D30/70
Inventor 张天魁王悦雷佳艺冯春燕
Owner BEIJING UNIV OF POSTS & TELECOMM
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