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Energy consumption and user fairness combined content delivery method in D2D (Device-to-Device) cache network

A user and cache technology, which is applied in the field of wireless communication, can solve problems such as not considering fairness, and achieve the effects of saving transmission energy consumption, good performance, and energy saving

Active Publication Date: 2019-03-29
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] Aiming at the current content distribution process, the default transmission must be successful, ignoring the energy consumption caused by transmission failure, and also not considering the fairness of the requesting user when obtaining the content, the present invention provides a joint energy consumption under the D2D cache network and user fair content distribution method

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  • Energy consumption and user fairness combined content delivery method in D2D (Device-to-Device) cache network

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Embodiment Construction

[0022] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] In the content distribution process of the buffer-based cellular and D2D networks, the present invention not only considers the energy consumption caused by the transmission failure neglected in the prior art, but also considers the fairness of content acquisition by users. System performance is also critical.

[0024] Such as figure 1 As shown, it is a scenario of a cache-based D2D communication system applied by the method of the present invention, and the scenario is a single-cell cellular network assisted by D2D communication. When a user requests a file, it can be obtained from the surrounding cached users through D2D communication. The content distribution method based on cache-based D2D network combined energy consumption and user fairn...

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Abstract

The invention provides an energy consumption and user fairness combined content delivery method in a D2D (Device-to-Device) cache network and belongs to the technical field of wireless communication.The method comprises the realization steps of simulating a two-way selection process between request users and cache users in a content delivery process into the maximum weight matching problem in a bipartite graph; and carrying out content delivery through D2D, assuming that at the same time, a file f<k> in a network has M request users and N cache users, and when the content delivery is carriedout, carrying out the following condition that when the M is smaller than or equal to the N, M users are selected from the cache users for matching with the requests users, when the M is greater thanthe N, N users are selected form the request users for matching with the cache users, and it is ensured that weight sum of the matching users is the maximum. According to the method, in the content delivery process of a cellular and D2D network based on cache, energy consumption resulting from unsuccessful transmission is taken into consideration, and fairness for the users to obtain content is also taken into consideration, so energy consumption can be reduced, and the fairness for the users to obtain the content also can be ensured.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a content distribution method combining energy consumption and user fairness under a D2D (Device-to-Device, device-to-device) cache network. Background technique [0002] With the rapid growth of mobile data, the load pressure on the base station in the cellular network is also increasing accordingly. In order to meet the increasing needs of users and provide users with better and higher-quality services, various new technologies have emerged to meet the challenges faced by cellular networks. D2D communication has attracted the attention of many researchers because of its unique advantages of offloading base station load traffic, improving system throughput, reducing delay, and improving spectrum efficiency. The introduction of D2D technology into traditional cellular networks can effectively solve problems such as shortage of spectrum resources and po...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/70H04W52/02H04L29/08
CPCH04W4/70H04W52/0209H04L67/568Y02D30/70
Inventor 张鹤立左玉玲纪红李曦
Owner BEIJING UNIV OF POSTS & TELECOMM
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