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Cache distribution method for D2D wireless cache network

A cache allocation and network technology, applied in the field of mobile communications, can solve the problems of not considering the process of successful file transmission, not considering the quality of network service, and the inability to adopt caching strategies.

Inactive Publication Date: 2017-01-04
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

However, neither of these two caching methods considers the quality of service (QoS) of the network, so the caching strategy cannot be adopted in the actual system. In addition, these two caching schemes only consider the process of the user finding the file in the neighborhood, and do not consider the file The process of successfully transmitting in the presence of network interference, which is impractical

Method used

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  • Cache distribution method for D2D wireless cache network
  • Cache distribution method for D2D wireless cache network
  • Cache distribution method for D2D wireless cache network

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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] S1. During downlink transmission, each D2D receiver Rx performs interference calculation on the Rx according to the swimming signal sent from the D2D link transmitter Tx and from all other transmitters except the target transmitter;

[0042] S2. Calculate the interruption probability of the D2D link when acquiring file i according to the SINR described in S1, where M means that there are M files in total, and i∈[1,M];

[0043] S3. According to the probability of each file requested and the cache probability of each file, an optimization problem is established aiming at realizing the minimum average content interruption probability of the network;

[0044] S4. Using KKT conditions to solve the optimization problem with low complexity, and obtain a low content interruption probability method for the network based on the cache allocation scheme.

[0045]...

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Abstract

The invention belongs to the mobile communication and particularly relates to wireless cache network nodes in the mobile communication which can store the content required by users in the vicinity in advance during the network idle time. The invention provides a cache distribution method for D2D wireless cache network. The distribution method is a cache distribution method based on low content interrupt probability in the interference environment, which can effectively reduce the redundancy degree of the cache in the wireless network, meets the need of low interruption probability under the condition of meeting network QoS, and improves the content delivery capability of network; and meanwhile, the distribution method is suitable for the actual scene with dynamic changes.

Description

technical field [0001] The invention belongs to the field of mobile communication, in particular to a wireless caching network node in mobile communication that stores content required by nearby users in advance when the network is idle. Background technique [0002] With the continuous development of science and technology, smart phones and tablet computers are gradually popularized, and a large number of new wireless service applications emerge, such as web browsing, video, WeChat, Weibo, etc., which makes wireless mobile communication penetrate from the initial call function to office and entertainment. All aspects of life, such as social networks, have also contributed to the rapid growth of global mobile data traffic. [0003] In recent years, based on the characteristics of video and the reality of hard disk storage, researchers have proposed a new solution. The basic idea is to configure large-capacity storage at the wireless access point, and utilize Files such as p...

Claims

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Application Information

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IPC IPC(8): H04W4/00H04W28/14
CPCH04W28/14
Inventor 谭夏宁欧振威赵国栋李立英
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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