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A Named Data Network Adaptive Caching Strategy for Internet of Vehicles

A named data network and car networking technology, applied in the field of named data network adaptive caching strategy, can solve the problems of reducing cache diversity and low utilization of cache resources, so as to solve the problem of low cache efficiency, improve network resource utilization and overall Network performance, the effect of avoiding broadcast storms

Active Publication Date: 2019-12-10
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing NDN caching strategy leads to a large number of redundant copies of vehicle nodes, which makes the utilization of caching resources in the network low and reduces the diversity of caching

Method used

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  • A Named Data Network Adaptive Caching Strategy for Internet of Vehicles
  • A Named Data Network Adaptive Caching Strategy for Internet of Vehicles
  • A Named Data Network Adaptive Caching Strategy for Internet of Vehicles

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Embodiment Construction

[0026] The present invention is described in further detail below in conjunction with accompanying drawing:

[0027] like figure 1 As shown, the present invention is a named data network adaptive caching strategy oriented to the Internet of Vehicles,

[0028] Let the source request node be V i , the data source node is V j1 , the set of vehicle nodes in the Data return path is V j ={V j1 ,V j2 ,V j3 ...V jn}, V j2 is the data source node V j1 Return the next node, V j3 ~V jn It is the next node on the backhaul path in turn; the last node V of the backhaul jn i.e. V i .

[0029] Specifically include the following steps:

[0030] Step 1): Add fields in the Interest package and Data package,

[0031] Add the hop number Hop field in the data packet format of the named data network Interest packet, record the number of nodes that the Interest packet passes through, add 1 to the Hop field every time a node passes, and add the number of occurrences of the request prefi...

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Abstract

The invention discloses a named data network self-adaptive caching strategy oriented to the Internet of Vehicles, by extracting the V j1 , V j2 , V j3 The number of occurrences of the request prefix, the average value of the number of occurrences of the request prefix to calculate the content popularity, and calculate the interval hops of the data packet cache of the node. The present invention combines the cache content and the dynamic characteristics of traffic flow, and proposes to carry out the calculation according to the content popularity and vehicle density. Cache decision, cache data packets every hop, calculate the interval hops of the data packet cache of the node according to the content popularity in the named data network, and then use the vehicle density to adjust the hops adaptively, and cache the Data packets every hop, which can effectively release the cache Space, so as to solve the problem of homogeneous cache and low cache efficiency, optimize the overall performance of the Internet of Vehicles, reduce congestion, reduce network overhead, reduce cache redundancy in the network, avoid broadcast storm problems, and improve network resources. Utilization and overall network performance.

Description

technical field [0001] The invention relates to the field of named data network of the Internet of Vehicles, in particular to an adaptive caching strategy for the named data network oriented to the Internet of Vehicles. Background technique [0002] At present, named data network (NDN) has been widely used in the field of Internet of Vehicles. In-network caching is an important feature of NDN. With the rapid increase of content volume, how to use the limited cache space to choose a reasonable cache for each user has become an issue. become a key issue of NDN caching strategy. Existing NDN caching strategies lead to a large number of redundant copies of vehicle nodes, which makes the utilization of caching resources in the network not high and reduces the diversity of caching. Contents of the invention [0003] The purpose of the present invention is to provide a named data network adaptive caching strategy oriented to the Internet of Vehicles, so as to overcome the defici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08
CPCH04L67/12H04L67/5682H04L67/63
Inventor 段宗涛樊娜张天洋朱依水张俊哲
Owner CHANGAN UNIV
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