Repairable fountain code design method for unequal local domains

Abstract

The invention discloses a repairable fountain code design method for unequal local domains, which is suitable for equipment cache downloading and data restoration of a hierarchical heterogeneous D2D network, and constructs a hierarchical heterogeneous D2D distributed storage network model based on a macro base station BS, a micro base station MBS and mobile equipment. an energy overhead formula ofdata downloading and data restoration is deduced through the model, and an unequal locality repairable fountain code and a data restoration strategy thereof suitable for a hierarchical heterogeneousstorage network are designed; When it is detected that the storage nodes leave the area, data in the leaving storage nodes are restored and stored to new storage nodes in the area on the basis of an energy overhead formula and the non-equal locality repairable fountain codes, and therefore data downloading requests and system availability of other devices are guaranteed. According to the method, the communication overhead of data downloading and repairing can be reduced, and the problems of unbalanced communication overhead and energy consumption waste caused by an existing D2D distributed storage network are solved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for designing repairable fountain codes in non-isolocal domains. Background technique [0002] With the rapid growth of global mobile data volume, the spectrum resources of mobile communications and the load of base stations are facing great pressure and challenges. Device-to-device communication (D2D) allows user terminals to reuse the spectrum resources of the cellular system. Mobile devices communicate directly with each other without being forwarded by the base station, which relieves the load on the base station and improves the spectrum resources of the cellular system. efficiency. [0003] At the same time, in order to solve the problem of reliable storage of massive data, use the powerful storage, computing and mutual communication capabilities of existing mobile devices to disperse and cache file content to multiple mobile devices, which can meet...

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Problems solved by technology

[0005] Aiming at the application of data fault-tolerant technology in the above-mentioned D2D distributed storage network and the characteristics of future base station miniaturization, the present invention provides a repairable fountain code design method in non-isolocal domains to reduce the communication overhead of data download and repair, and solve the problem of The existing D2D distributed storage network brings the problems of unbalanced communication overhead and waste of energy consumption

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