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A cache update method and network based on node displacement and lfu records

A technology of node displacement and update method, which is applied in the direction of transmission system, electrical components, etc., and can solve the problems of optimality influence of mobility cache update algorithm and reduction of reference value, etc.

Inactive Publication Date: 2020-06-19
宿州学院
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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.

Method used

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  • A cache update method and network based on node displacement and lfu records
  • A cache update method and network based on node displacement and lfu records
  • A cache update method and network based on node displacement and lfu records

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[0063] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0064] exist figure 2 In the communication scenario shown, at the previous moment, user 1 is close to four surrounding users 2, 3, 4, and 7, and can establish a D2D link to directly share content; Establish D2D links with four users 3, 5, 7, 9 to directly share content. But at this time, there is no social relationship or poor relationship between user 1, user 5, and user 9, and there is no D2D communication link between user 1, user 5, and user 9 to share content. In addition, because user 2 and User 4 is not within the range where User 1 can directly communicate, and the communication link between User 1 and User 2 and User 4 no longer exists. It can be seen fr...

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Abstract

A cache update method and network based on node displacement and LFU records. A popular content cache update method, communication device and network suitable for mobile networks, according to the displacement of nodes in the network, combined with the LFU cache update method, the popular content cached in the node is partially updated. The cache updating method provided by the present application can reduce the data traffic consumed by updating the cache. In view of the obvious differences in popular content in different regions in the mobile network, the node displacement is taken into consideration when updating the cache. In particular, considering the limited resources of the node itself, this method only uses information such as location information, received content requests, and time that the node can easily obtain, combined with LFU records, to establish a content value model and update the cache in real time, without generating additional Improve the effectiveness of storing data in node caches under computational 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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08
CPCH04L67/5682
Inventor 李明
Owner 宿州学院
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