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Optimal buffer resource allocation method based on yoke theory in wireless content distribution network

A content distribution network and resource allocation technology, applied in the field of optimal buffer resource allocation in wireless content distribution networks, can solve problems such as buffer queuing, overflow, and limited buffer resources, and achieve the effect of improving distribution performance

Active Publication Date: 2019-07-23
NANJING INST OF TECH
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Problems solved by technology

Usually, an intermediate node may provide relay services for multiple users at the same time, and the buffer resources contributed by the intermediate node are limited, which may cause queuing and overflow problems in the buffer

Method used

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  • Optimal buffer resource allocation method based on yoke theory in wireless content distribution network
  • Optimal buffer resource allocation method based on yoke theory in wireless content distribution network
  • Optimal buffer resource allocation method based on yoke theory in wireless content distribution network

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 As shown, a wireless heterogeneous network is given, including a server, a base station, multiple intermediate nodes and multiple users. There are multiple service users around an intermediate node, and the intermediate node contributes buffer resources to surrounding users and provides relay services, thereby enhancing the forwarding speed of wireless network content.

[0030] 1. Data Arrival Model

[0031] assume user The amount of data requested at time k is denoted as a i (k). a i (k) Obedience has two states The Markov modulation switching process. state Indicates that no data has arrived, ie a i (k)=0, state Indicates that there is data arrival, and a i (k)=R i . a i The transition matrix of (k) is expressed as: where p i Indicates the slave state to state transition probability, ...

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Abstract

The invention provides an optimal buffer resource allocation method based on yoke theory in a wireless content distribution network. First, a relationship between a backlog length, a buffer capacity,a data arrival rate, and a service rate in a buffer is determined. A buffer overflow probability expression is determined by applying a martingale theory. The maximum buffer overflow probability tolerable by each service user is given, and the minimum buffer capacity required by each service user is determined. According to the relation between the buffer capacity contributed by the intermediate node and the minimum buffer capacity required by the user who serves the intermediate node, the connection relation between the user and the edge equipment is determined, so that the optimization problem of minimizing the buffer overflow probability sum is constructed, and an optimal buffer resource allocation scheme is determined by using a water injection method. The probability of buffer overflow of the intermediate node is reduced, the content distribution efficiency is improved, and the distribution performance of the wireless content distribution network is further improved.

Description

technical field [0001] The invention relates to the technical fields of wireless content distribution network, edge storage and resource allocation, and in particular to an optimal buffer resource allocation method in the wireless content distribution network. Background technique [0002] With the rapid development of smart terminals, people's consumption of social and entertainment, especially video resources, has shown a rapid growth momentum. Video data plays an increasingly important role in wireless networks. Cisco predicts that by 2021, wireless video data will account for 78 percent of wireless data volume. In order to meet people's ever-increasing video consumption demands, it is necessary to upgrade or redesign the architecture of the wireless network, and the upgrade and transformation of the existing network is very expensive. However, on the one hand, a huge amount of video files in the network is composed of a small number of popular video files. On the othe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02H04W72/04
CPCH04W24/02H04W72/53
Inventor 刘婷婷朱昊包永强孙琳琳邹骏束锋
Owner NANJING INST OF TECH
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