Cellular downlink network energy efficiency optimization system and method based on cache popular content

Abstract

The invention discloses a cellular downlink network energy efficiency optimization system and method based on a cache popular content; contents with different popularity are cached in a base station by adopting a distributed cache method; and the cellular network is divided into SGW, BS and UE, wherein the SGW caches a file requested by the BS, and each BS is provided with a cache device capable of caching Nc contents and is connected with the SGW through a backhaul link with the capacity of CBH; when the file requested by the user is cached in the local base station, the base station directlyacquires the file and transmits the file to a user; otherwise, the file is acquired from the SGW and transmitted to the user through the backhaul link. A popular content is a content that is more frequently requested by the user within a time T0, and the downlink energy efficiency gain is the ratio of the number of bits transmitted in the whole downlink network and the consumed power. The distributed cache is that four adjacent base stations cache different contents, and when each user requests the content, a nearest base station for caching the content is selected; the method reduces the redundancy of the base station content and increases the cache hit rate at the same time.

Description

technical field [0001] The invention belongs to the technical field of mobile networks, and in particular relates to a cellular downlink network energy efficiency optimization system and method based on caching popular content, in particular to a cellular downlink network energy efficiency optimization method based on caching popular content in a 5G cellular network. It is mainly used in the fifth-generation mobile communication network with explosive throughput requirements. This method ensures the user service quality and traffic load, improves the energy efficiency of the wireless mobile network, and reduces carbon dioxide emissions at the same time. Background technique [0002] With the rise of smart terminals, tablet PCs, and social networks, the demand for mobile services will grow explosively, and wireless data traffic and signaling will have an unprecedented impact on mobile communication networks. According to the forecast of the International Telecommunication Uni...

AI Technical Summary

Problems solved by technology

4G technology is difficult to meet the development needs of mobile communication technology

Although these technologies can increase capacity, they also bring new technical challenges to mobile communication networks

[0004] Due to the need to consider channel interference, uncertainty, power control, channel overhead and other issues in the design of wireless network virtualization, the wireless network is more complex than the wired network, so the virtualization technology of the wired network cannot be directly applied to wireless virtualization in the network

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