Collaborative encoding caching method in d2d network based on dynamic request

Abstract

The present invention requests protection of a dynamic request-based cooperative encoding and caching method in a D2D network, which includes the following steps: Step 1, building a network architecture; Step 2, establishing a user content sharing model in a D2D network; The content is processed by the maximum separable code MDS; step 4, the user obtains the content package; step 5, calculates the content transmission delay during the D2D transmission process and the base station to the user transmission process; step 6, analyzes the dynamic request of the user; step 7, Establish the encoding cache problem in the D2D network as a Markov decision process MDP; step 8, calculate the average value of cache rewards; step 9, set up an optimization problem with the average value of maximizing the total time cache rewards as the optimization goal; step 10 , A Q-learning-based cooperative coding cache algorithm is proposed to solve it. The method of the invention reduces buffer redundancy and eases the flow load pressure of the base station.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a dynamic request-based cooperative encoding and buffering method in a D2D network. Background technique [0002] With the development of wireless network technology and the popularity of cloud applications, content diversity and mobile data traffic are exploding. Mobile data traffic is increasing at an exponential rate. This rapid growth has led to an increase in the burden on the backhaul link, reducing the quality of service (Quality of service, QoS) of users in the mobile cellular network. In order to solve this problem, caching technology has caused extreme Big attention because it can effectively reduce backhaul traffic by eliminating multiple duplicate data transmissions for popular content. The core idea of ​​caching technology is to place content in different locations to avoid communication link congestion caused by simultaneous requests for ...

AI Technical Summary

Problems solved by technology

[0005] However, there are still some deficiencies in the research on caching in D2D networks. Users in D2D networks lack effective collaboration methods, and there are few studies on how to formulate coding caching strategies under the condition of dynamic changes in user request status. The cache efficiency of the medium user equipment is reduced, and a large amount of cache redundancy is generated at the same time, and the cache capacity of the user equipment is wasted.

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