计算机工程 ›› 2019, Vol. 45 ›› Issue (1): 315-320.doi: 10.19678/j.issn.1000-3428.0048022

• 开发研究与工程应用 • 上一篇    

基于PIT相似性的VANET混合协同缓存策略

黄继海,丁颖,赵冰   

  1. 郑州工程技术学院 信息工程学院,郑州 450044
  • 收稿日期:2018-03-18 出版日期:2019-01-15 发布日期:2019-01-15
  • 作者简介:黄继海(1977—),男,副教授、硕士,主研方向为车载网络技术;丁颖(通信作者),讲师;赵冰,副教授、硕士。
  • 基金项目:

    河南省基础与前沿技术研究计划项目(152300410006);郑州工程技术学院科技创新团队建设计划(CXTD2018K1)

VANET Hybrid Collaborative Caching Strategy Based on PIT Similarity

HUANG Jihai,DING Ying,ZHAO Bing   

  1. School of Information Engineering,Zhengzhou Institute of Technology,Zhengzhou 450044,China
  • Received:2018-03-18 Online:2019-01-15 Published:2019-01-15

摘要:

针对车载自组织网络存在内容重复传输和访问时延长的问题,设计一种基于待处理请求表(PIT)相似性的混合协同缓存策略。依据中心节点PIT相似度,给出自适应构建缓存社区的方法。采用虚拟分布式哈希表实现相似区域的缓存调度,并在区域外采用下游节点保留副本策略实现混合协同。实验结果表明,与ICN经典缓存算法相比,该策略能够以较低的通信开销和存储代价,降低网络负载和节点缓存操作频度,提高缓存利用率。

关键词: 车载自组织网络, 内容共享, 待处理请求表, 混合协同, 缓存

Abstract:

Aiming at the problem of repeated content transmission and long access delay in the Vehicular Ad Hoc Network(VANET),a hybrid collaborative caching strategy based on the similarity of Pending Interest Table(PIT) is designed.According to the PIT similarity of the central node,a method for adaptively building a caching community is given.The Virtual Distributed Hash Table(VDHT) is used to implement the buffer scheduling of similar areas,and the Leave Copy Down(LCD) strategy is used outside the area to achieve hybrid clooaboration.Experimental results show that compared with the classical ICN cache algorithm,this strategy can reduce network load and node caching operation frequency with a small amount of communication and storage cost,and improve caching utilization.

Key words: Vehicular Ad Hoc Network(VANET), content sharing, Pending Interest Table(PIT), hybrid collaboration, caching

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