Data distribution method and device in edge cache

Abstract

In order to relieve network pressure caused by sudden increase of local flow in an emergency communication scene, the embodiment of the invention provides a data distribution method and device in an edge cache. The method guarantees high-spectral-efficiency low-delay data distribution during multi-service concurrence, and comprises the following steps: dividing terminal users into a plurality of NOMA groups according to a data distribution mode, namely direct transmission or relay, stored by an edge node, and each NOMA group comprises a direct transmission user and a relay user; the pluralityof NOMA groups are divided into two types according to different channel conditions from the direct transmission users and the relay users to the edge nodes, the channel conditions of the direct transmission users of the first type being good, otherwise, the channel conditions of the direct transmission users of the second type being good; the successful distribution probability of the NOMA groupof the first category and the NOMA group of the second category is determined; and the sending power and spectrum resource allocation of the edge nodes are optimized by taking the maximization of thesuccessful distribution probability of the whole network as a target. According to the invention, the requirements of multiple users for data can be met efficiently, and the probability of successfuldata distribution is improved.

Description

technical field [0001] The present invention relates to the technical field of communications, and more specifically, to a method and device for distributing data in an edge cache. Background technique [0002] In emergency communication, there may be a problem of local traffic surge caused by the sudden increase of regional population density, and the existing communication infrastructure service facilities and limited spectrum resources are difficult to meet the high concurrency and low-latency business needs of users. At the same time, with the rise of online video services, high-definition video, and social applications based on video / picture data, the communication mode of mobile networks is changing from traditional connection-centric to data-centric ( content-centric), therefore, cache-driven content-centric wireless networks are receiving extensive research and attention, by pre-caching popular data in specific locations of the network (such as edge nodes closer to u...

AI Technical Summary

Problems solved by technology

[0003] However, the total size of all popular data will usually exceed the storage space of a single edge node, so a single edge node cannot store all popular data. In addition, the communication range of a single edge node is limited. The above two points may cause the requesting user to fail Successfully obtained the required data from the edge node

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