缓冲辅助中继网络中的缓冲资源分配方法
作者:
作者单位:

1.南京工程学院信息与通信工程学院,南京,211167;2.南京工程学院经济与管理学院,南京,211167

作者简介:

通讯作者:

基金项目:

国家自然科学基金(61702258)资助项目。


Buffer Resource Allocation in Buffer-Aided Relay Networks
Author:
Affiliation:

1.School of Information and Communication Engineering, Nanjing Institute of Technology, Nanjing, 211167, China;2.School of Economics and Management, Nanjing Institute of Technology, Nanjing, 211167, China

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    随着通信技术和智能终端的发展,移动内容消费出现了明显的增长。人们随时随地享受无线网络带来的多媒体娱乐体验的同时,也给蜂窝网络带来了巨大的压力,尤其是热门视频的重复传输,浪费了网络资源。预存储技术被认为是解决这类问题的有效方法。它是在非高峰时段,将热门视频等预先存储在网络边缘,以缓解高峰时段网络流量的压力。为了给用户提供更好的内容传输效率,预存储技术中基于缓冲辅助的中继网络被提出。由于中继结点缓冲空间有限,当其需要服务多个用户时,有必要对中继结点的缓冲资源进行优化分配。基于此,本文提出了一种中继结点的缓冲资源分配方法。首先,根据中继结点数据到达模型和数据处理模型,以及中继结点能忍受的缓冲区溢出概率,得到中继结点可以贡献出的最大缓冲区比例;接着,根据用户的数据到达模型和数据服务模型,给出用户缓冲区溢出概率与缓冲区比例关系的表达式;然后,建立优化问题,以最小化网络中所有用户缓冲区溢出概率和为目标,给出最优的缓冲区分配方法;最后,仿真结果证实了本文提出的方法比均匀分配法能获得更小的用户缓冲区溢出概率和。

    Abstract:

    With the development of communication technology and the boost of intelligent terminals, mobile content consumption has been witnessed a significant increase. While people enjoy the multimedia entertainment experience brought by wireless network anytime and anywhere, it also brings great pressure to the cellular networks, especially the repeated transmissions of popular videos, which leads to the waste of network resources. The caching technology is considered to be an effective way to solve such problems. It stores popular videos in advance at the edge of the network in off-peak hours to relieve the pressure of network traffic during peak hours. To provide users with better content transmission efficiency, the buffer-aided relay network is proposed. Due to the limited buffer space of the relay node, it is necessary to study the allocation of buffer resources when the relay node needs to serve multiple users. To this end, this paper proposes a buffer resource allocation method for relay nodes. Firstly, according to the data arrival model and data processing model of the relay node, as well as the buffer overflow probability that the relay node can tolerate, the maximum buffer proportion contributed by the relay node is provided. Then, according to the user’s data arrival model and data service model, the expression between the user’s buffer overflow probability and the buffer portion is given. Then, an optimization problem is established to minimize the sum of user buffer overflow probability in the network, and the optimal buffer allocation method is presented. Finally, simulation results show that the proposed method can obtain a smaller sum of user buffer overflow probability than the uniform allocation method.

    参考文献
    相似文献
    引证文献
引用本文

刘婷婷,陈开源,蒋诚智,余雨,蒋姝.缓冲辅助中继网络中的缓冲资源分配方法[J].数据采集与处理,2020,35(6):1116-1124

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:2020-07-20
  • 最后修改日期:2020-09-11
  • 录用日期:
  • 在线发布日期: 2020-11-25