Cache updating method based on node displacement and LFU record and network

Abstract

The application provides a cache updating method based on node displacement and LFU records and a network. A popular content cache updating method suitable for a mobile network, a communication device and the network are used to partially update the popular contents cached in a node according to the displacement of the node in the network in combination with an LFU cache updating method. By adopting the cache updating method provided by the application, the data traffic consumed by updating the cache can be reduced; aiming at the obvious difference of the popular contents in different regions of the mobile network, the node displacement is taken into account when performing cache updates; particularly, in consideration of the own limited resources of the node, by adopting the method provided by the application, a content value model can be established and the cache can be real-timely updated by only using the location information that can be easily acquired by the node and the content request, time and other information received by the node in combination with the LFU record, and the validity of the stored data in the node cache can be improved without generating an additional calculation load.

Description

technical field [0001] The present invention relates to content caching and distribution technology, in particular, to a caching content update method and network suitable for mobile networks. Background technique [0002] With the rapid growth of mobile data services, a content caching and distribution technology based on D2D (Device to Device, device to device) communication appears. The feature of this technology is that in each node in the collection, the popular content that is generally concerned in the collection is cached. When a certain node in the collection needs a certain content, it establishes D2D with the surrounding nodes that have cached the content. link to obtain this content by multiplexing the channels of legitimate cellular users. In this way, compared with the traditional content download method, it has the following advantages: first, the transmission delay of information is reduced without forwarding by the base station; second, the direct transmiss...

AI Technical Summary

Problems solved by technology

However, due to the introduction of D2D communication technology in today's mobile networks, in this case mobile nodes have personal preferences and social attributes, and the mobility of nodes has a great impact on the optimality of the cache update algorithm

Due to the mobile behavior of mobile nodes in the network, the topology of the entire network is also changing all the time, and the reference value of the information about popular content collected by users may be greatly reduced in the new network environment after the move.

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