Cellular downlink network energy efficiency optimization system and method based on buffering popular content
A downlink and content technology, which is applied in the cellular downlink network energy efficiency optimization system and field based on caching popular content, can solve the problem of inability to virtualize technology applications, 4G technology difficult to meet the development needs of mobile communication technology, complex wireless networks, etc. question
Active Publication Date: 2020-01-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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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[0071] The following problems are mainly considered during the design of the present invention:
[0072] 1) Construct a system with N b A wireless downlink cache network model of multiple cells and multiple users with full-frequency reuse of a base station, and design the distribution of users and base stations in the network model;
[0073] 2) Realize the popularity distribution of content requested by users within T time;
[0074] 3) Consider whether the content requested by the user is cached in the base station, and realize the design of the cache hit rate;
[0075] 4) Build a strategy for distributed caching of popular content;
[0076] 5) Design the sleep mode of the base station;
[0077] 6) Realize the throughput of the downlink network according to the cache hit rate and miss rate
[0078] 7) According to the sleep mode of the base station, respectively realize the circuit power consumption and transmission power consumption of the base station sleep state and act...
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The invention discloses a cellular downlink network energy efficiency optimization system and method based on caching of popular content. A distributed caching method is used to cache content with different popularity in a base station. The cellular network is divided into SGW, BS, and UE. SGW caches files requested by BS, and each BS has cacheable N c A content cache device with a capacity of C bh The backhaul link is connected to the SGW. When the file requested by the user is cached in the local base station, the base station directly obtains the file and transmits it to the user; otherwise, the file is obtained from the SGW through the backhaul link and transmitted to the user. The popular content is at time T 0 The downlink energy efficiency gain is the ratio of the number of transmitted bits to the consumed power in the entire downlink network. Distributed cache is that four adjacent base stations cache different content. When each user requests content, the nearest base station that caches the content is selected to connect. This method reduces the redundancy of base station content and increases the cache hit rate.
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...
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IPC IPC(8): H04W28/02H04W28/06H04L29/08H04W28/08H04W52/02
CPCH04W28/02H04W28/0236H04W28/06H04W28/08H04W52/0206H04L67/568Y02D30/70
Inventor 嵇介曲朱琨王然代陈
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS