Base station caching method based on minimized user delay in edge caching network

Abstract

The invention discloses a base station caching method based on the minimized user delay in an edge caching network, and belongs to the field of wireless mobile communication. In an edge caching network scene, a connection matrix between a user and a base station is established at first; simultaneously, a strategy that the base station caches a file is generated; a relationship matrix between the base station and the file is established; then, the average hit rate that all users in the whole network obtain the file from the base station is counted; a constraint condition is set to achieve the optimal minimum network user average delay when satisfying a reasonable user average hit rate threshold value; a traversing method is further used for solving and finding an optimal base station content storage strategy; a small base station is deployed according to the strategy; and finally, a user is connected to the small base station to obtain the file. According to the base station caching method based on the minimized user delay in edge caching network disclosed by the invention, the balance problem of the average delay and the average hit rate in a process of designing the small base station file caching strategy of the edge caching network is sufficiently considered; and thus, the purpose of minimizing the user average downloading delay when a certain user average hit rate is satisfied is realized.

Description

technical field [0001] The invention belongs to the field of wireless mobile communication, in particular to a base station caching method for minimizing user time delay in an edge caching network. Background technique [0002] With the explosive growth of the smart phone industry, multimedia services, and mobile phone applications, a large amount of mobile data has emerged; in order to solve the huge amount of data in the future network, a promising solution has been proposed, that is, in the macro base station A large number of small base stations are arranged under the coverage area. [0003] In order to meet users' demand for data rate, people store files in small base stations; although this can make files closer to users and reduce repeated transmission of files in the network, users can also obtain required files more quickly. However, small cells have limited storage capacity and cannot store all the files that users may need in the cache. [0004] Therefore, under...

AI Technical Summary

Problems solved by technology

[0008] In the edge cache network, there is a novel content distribution strategy, which can reduce the transmission energy consumption in the network; but this strategy does not discuss the relationship between the average hit rate of users and the average download delay of users. Rate and download delay are often contradictory, so the trade-off between the two needs to be considered

Images