A Novel Content Cache Distribution Optimization Method in Wireless Heterogeneous Networks

Abstract

A new cache content placement and content cache distribution optimization method in a wireless heterogeneous network. By sinking the wireless cache to the edge nodes and the user end of the wireless network, the content that may be requested by the user is cached in advance when the network load is low To the edge nodes and user terminals of the network, and then distributed to the target users, thereby effectively reducing network redundancy traffic and effectively reducing peak traffic. At the same time, the successful transmission probability expression is derived, and the cache content distribution is optimized with the goal of maximizing the successful transmission probability. The optimized content cache distribution not only greatly improves the probability of successful transmission, but also avoids the problems of redundant network traffic, network congestion and overhead waste caused by repeated distribution of the same content.

Description

technical field [0001] The invention relates to the technical field of wireless communication. Background technique [0002] With the rapid development of the Internet and the continuous growth of data traffic on smart terminals, traditional networks are gradually overwhelmed by pressure from base station deployment expenses, operating costs, and user experience. In order to meet this challenge, the wireless cache edge network, on the one hand, can "sink" the network service to the wireless access network side closer to the user; Significantly improved. Therefore, the wireless network does not need to wait for the service request to come before responding and scheduling, but when the network load is low, the content that the user may request is cached in advance to the edge node of the network, and then distributed to the target user. Wireless edge caching can effectively reduce network redundant traffic, effectively reduce peak traffic and power consumption, overcome netw...

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Problems solved by technology

Although in "Wireless content caching for small cell and d2d networks," IEEE Journal on Selected Areas in Communications, vol.34, no.5, pp.1222–1234, May 2016., the author considers both base station caching and user end caching, But it only focuses on the performance comparison of the two caching methods, and does not consider the actual fusion caching method, that is, how to consider an effective caching method in a multi-layer network

Moreover, the caching methods in the existing literature are mainly popularity caching or average caching, etc., without specifying how to efficiently store multiple different files on each base station or user

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