Cache-enabled D2D communication joint recommendation and caching method

A caching and solution technology, applied in probabilistic CAD, random CAD, digital data information retrieval, etc., can solve the problems of inability to meet all user content requests, multiple costs, differences, etc., to reduce pressure, large number of nodes, and high computing efficiency Effect

Active Publication Date: 2021-04-02
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, even if the request probability is reshaped through recommendation, the content requested by users will still vary to a certain extent. Only caching some files at

Method used

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  • Cache-enabled D2D communication joint recommendation and caching method
  • Cache-enabled D2D communication joint recommendation and caching method
  • Cache-enabled D2D communication joint recommendation and caching method

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Embodiment Construction

[0050] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0051] The present invention designs the recommendation and caching method in the D2D communication system applying caching technology, considers the limited cache capacity of the user and the limited number of recommendations, and optimizes the recommendation and caching strategy with the minimum average cost of obtaining files by the user as the optimization goal. The problem is divided into two sub-problems, cache strategy and recommendation strategy. In the case of fixed cache strategy, the annealing algorithm is used to obtain the recommended content for each user; then the recommendation strategy is fixed, and the cache solution for each user is obtained by knapsack algorithm. Recycle and iterate the two algorithms to minimize the average cost of users.

[0052] First, calculate the request probability of each user for different content:...

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Abstract

The invention discloses a cache-enabled D2D communication joint recommendation and caching method, and the method comprises the following steps: constructing an optimization function by taking the minimum file acquisition cost of a user as an optimization target under the conditions that the caching capacity of the user is limited and the recommendation quantity is limited, and obtaining a recommendation scheme for each user by adopting an annealing algorithm; obtaining a caching scheme of each user by using a knapsack algorithm, and performing iterative optimization on the caching scheme andthe recommendation scheme to obtain an optimal solution of the recommendation scheme and the caching scheme, thereby realizing minimization of the average cost of the users. According to the method, recommendation and caching are combined, the influence of different preferences of users on caching is reduced, the proposed recommendation and caching scheme can reduce the average cost of the users,the users are stimulated to use D2D communication, and the network pressure is reduced.

Description

technical field [0001] The present invention relates to a recommendation and caching method, in particular to a cache-enabled D2D communication joint recommendation and caching method. Background technique [0002] The explosive growth of smart mobile devices and smart applications has led to a sharp increase in mobile data traffic, and traditional cellular networks have been greatly challenged. Device-to-Device (D2D) technology, as one of the key technologies of the fifth-generation mobile communication, allows direct communication between adjacent devices in the communication network without the help of infrastructure such as core devices or central devices, thereby greatly reducing Data pressure on the core network of the communication system. The caching technology is to store the file content items (including videos, web pages, etc.) required by the user in the cache entity in advance, so that the user's demand for content can be effectively realized, greatly reducing ...

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Application Information

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IPC IPC(8): G06F16/9535G06F30/20G06F111/06G06F111/08
CPCG06F16/9535G06F30/20G06F2111/06G06F2111/08Y02D30/70
Inventor 朱琦华宇
Owner NANJING UNIV OF POSTS & TELECOMM
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