Cache updating method based on node displacement and LRU (Least Recent Used) record

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

Inactive Publication Date: 2017-07-07
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 th

Method used

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  • Cache updating method based on node displacement and LRU (Least Recent Used) record
  • Cache updating method based on node displacement and LRU (Least Recent Used) record
  • Cache updating method based on node displacement and LRU (Least Recent Used) record

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Embodiment Construction

[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

The invention discloses a popular content cache updating method suitable for a mobile network, a communication device and a network. Popular content cached in a node is partially updated according to the displacement situation of the node in the network in conjunction with an LRU (Least Recent Used) cache updating method. Through adoption of the cache updating method provided by the application, the data flow consumed during cache updating can be lowered. Specific to the characteristic of remarkable difference between popular content in different regions in the mobile network, a node displacement situation is considered during cache updating. In particular, under the consideration of limited resources of the node, a content value model is established according to information such as position information which can be easily acquired by the node, a received content request, and time in conjunction with LRU record, and cache is updated in real time, so that the validity of data stored in node cache can be enhanced under the situation of not generating 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...

Claims

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Application Information

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IPC IPC(8): H04L29/08
CPCH04L67/5682
Inventor 李明
Owner 宿州学院
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