Code equally-divided caching method for satellite-ground communication transmission

Abstract

The invention discloses a code equally-divided caching method for satellite-ground communication transmission. The code equally-divided caching method for satellite-ground communication transmission comprises the following steps: establishing a space ground communication network data transmission system; the satellite transmits the request data to different base stations, and actively sends part of the data to the base stations for caching under the condition of no command; the base station recovers all the files and sends the recovered files to the requesting user; a coding cache algorithm is designed, and the problem of nonlinear optimization of two mixed integers is solved by using an optimal cache distribution mode of minimum transmission throughput. According to the method, a space ground communication network data transmission system is established, aiming at request instructions with different sizes in each cache network, the cache size and a link channel are optimized, a coding cache algorithm is designed, and an optimal cache distribution mode of the minimum transmission throughput is used, so that the nonlinear optimization problem of two mixed integers is solved; the total transmission quantity is reduced, and free allocation of the cache size is realized.

Description

technical field [0001] The present invention relates to the technical field of caching methods, in particular to an encoding equal-division caching method for satellite-to-earth communication transmission. Background technique [0002] Satellites play an important role in modern communications, especially in the field of information distribution, especially in the airborne acquisition, processing, storage and distribution of large amounts of data. With the continuous integration and expansion of cyberspace, it will The integration of satellite network and ground network to form a space-ground integrated information center network will be the general trend. Large space data mainly comes from earth observation, deep space exploration, human information and network services, which will increase the communication traffic of space and ground networks. Extremely fast, such a sharp increase in traffic will lead to space channel link congestion, thereby increasing the network delay ...

AI Technical Summary

Problems solved by technology

[0004] Existing coded caching approaches have been referenced, but still only consider uncoded caching when introduced into space, existing engineered coded caching sensor networks only consider either broadcast channel, implementation-based throughput, or fixed cache size One, without considering the combination of optimizing the cache size and the link channel, because both the cache size and the link channel size will affect the transmission efficiency, only considering one of them or both alone cannot achieve the best transmission effect

Images