A base station buffering method under time-varying content popularity

A time-varying and popular technology, applied in network traffic/resource management, electrical components, wireless communication, etc., can solve problems such as performance to be improved, improve user satisfaction, improve user satisfaction, and improve cache hit rate Effect

Active Publication Date: 2018-12-11
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current caching research is to study the caching performance when the content popularity is known and does not change with time. When the content popularity changes with time, the performance needs to be improved.

Method used

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  • A base station buffering method under time-varying content popularity
  • A base station buffering method under time-varying content popularity
  • A base station buffering method under time-varying content popularity

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Embodiment Construction

[0022] The technical solution of the invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0023] Consider a macro cellular network that deploys N helpers, and the Helper uses a collection of express. Such as figure 1 As shown, each helper is connected to the macro base station through a reliable backhaul link, while providing high-speed data services to the users it serves. Assuming that each helper has a fixed cache capacity M, the content controller in the macro base station determines the cached content of each helper according to the cache policy. We divide the time into time slots, each time slot contains a user request phase and a cache placement phase. In the user request phase, the user served by the helper requests content. If the requested content is stored in the helper, the helper processes the request and quickly transmits the content to the user without causing a load on the macro cellular networ...

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Abstract

The invention discloses a base station buffer method under the condition that the content popularity changes with time. At each time period, depending on the instantaneous request frequency of the cached content, dobby gambling machines are used to estimate the popularity of content, the newly generated content is stored in these helpers in turn, considering the different request frequency of content under different helper coverage, the request frequency of new content under each helper is estimated by a latent factor model, and the content controller updates the cached content according to the estimated content popularity. The invention can estimate the content popularity online in real time and cache the content with high popularity in real time, thereby improving the cache hit rate, improving the user satisfaction and the backhaul link load.

Description

technical field [0001] The invention relates to the technical field of mobile communication systems, in particular to a base station caching method when content popularity changes with time. Background technique [0002] In order to cope with the challenge of system capacity brought about by massive data growth, an effective solution is to deploy helpers around macro base stations, where helpers have cache capacity and can cache content. When the content requested by the user is stored in the cache of the helper, the content is directly transmitted from the helper to the user, which does not occupy backhaul link resources, reduces transmission delay, and improves user experience. If the content requested by the user is not in the helper, the request is sent to the macro base station and the requested content is downloaded from the macro base station. The active storage of the base station is to store the content in the helper before the request arrives, which can reduce the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/14
CPCH04W28/14
Inventor 刘楠牛岩潘志文尤肖虎
Owner SOUTHEAST UNIV
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