计算机工程 ›› 2020, Vol. 46 ›› Issue (11): 223-230.doi: 10.19678/j.issn.1000-3428.0056463

• 移动互联与通信技术 • 上一篇    下一篇

面向数据新鲜度的ICN-IoT缓存方案

赵国锋1,2, 林欢1, 段洁1, 邹亚琴1, 曾帅1   

  1. 1. 重庆邮电大学 通信与信息工程学院, 重庆 400065;
    2. 重庆市光通信与网络高校重点实验室, 重庆 400065
  • 收稿日期:2019-10-31 修回日期:2019-12-06 发布日期:2019-12-17
  • 作者简介:赵国锋(1972-),男,教授、博士,主研方向为未来网络、网络安全、网络测量;林欢,硕士研究生;段洁,副教授、博士;邹亚琴,硕士研究生;曾帅,讲师、博士。
  • 基金项目:
    国家自然科学基金(61701058);"十三五"装备预研国防科技重点实验室基金(61422090301);重庆市基础研究与前沿探索项目(cstc2018jcyjA0743,cstc2016jcyjA0560);重庆市教委科学技术研究项目(KJQN201800640,KJQN201800633)。

ICN-IoT Caching Scheme for Data Freshness

ZHAO Guofeng1,2, LIN Huan1, DUAN Jie1, ZOU Yaqin1, ZENG Shuai1   

  1. 1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
    2. Optical Communication and Network Key Laboratory of Chongqing in Colleges and Universities, Chongqing 400065, China
  • Received:2019-10-31 Revised:2019-12-06 Published:2019-12-17

摘要: 信息中心网络(ICN)缓存能加速物联网(IoT)数据传输并减少数据响应延迟,但现有ICN缓存方案未考虑数据更新频繁与用户的数据新鲜度请求导致缓存效率较低。针对该问题,提出一种基于IoT数据新鲜度的ICN-IoT缓存方案。引入时间戳将用户对数据新鲜度的请求精确到时刻,根据IoT数据的关联性预测未来时刻数据值以满足用户请求,并结合内容流行度与基于时间的请求概率对到达内容做出缓存决策。仿真结果表明,与NDN-PET、NDN-TTL、PCC等缓存方案相比,该方案能有效减少IoT用户获取内容的平均时延并提高信息准确率。

关键词: 信息中心网络, 物联网, 缓存, 新鲜度, 时间戳

Abstract: The cache in Information-Centric Networking(ICN) can accelerate the transmission of data and reduce the delay of data response in Internet of Things(IoT).However,the existing ICN caching schemes do not consider the frequent data updates and users’ requests for data freshness,resulting in the low efficiency of caching.To solve the problem,this paper proposes an ICN-IoT caching scheme based on the freshness of IoT data.The timestamp is introduced to improve the time accuracy of user’s requests for data freshness.Then the data value in a future time is predicted based on the relevance of IoT data in order to meet the users’ requests.The content popularity and the time-based request probability are used to make a cache decision for the arrived content.Simulation results show that compared with NDN-PET,NDN-TTL and PCC caching schemes,the proposed scheme can effectively reduce the average delay for IoT users and improve the information accuracy rate.

Key words: Information-Centric Networking(ICN), Internet of Things(IoT), cache, freshness, timestamp

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