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Mobile-aware collaborative caching method based on consistent hashing in vehicle content-centric network

A technology of content-centric network and collaborative caching, which is applied in the direction of location information-based services, specific environment-based services, communication between vehicles and infrastructure, etc. Problems such as imbalance and waste of cache space can be achieved to reduce adverse effects, minimize them, and improve the cache hit rate

Active Publication Date: 2020-12-11
DALIAN UNIV OF TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since each vehicle makes a cache decision based on its own cache strategy, content with a large number of requests and high popularity will be cached by a large number of vehicles at the same time, which essentially causes cache redundancy and waste of cache space.
At the same time, considering the different caching capabilities of each node, the system lacks a manager or corresponding management mechanism for coordinating cache resources, which may lead to unbalanced cache load

Method used

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  • Mobile-aware collaborative caching method based on consistent hashing in vehicle content-centric network
  • Mobile-aware collaborative caching method based on consistent hashing in vehicle content-centric network
  • Mobile-aware collaborative caching method based on consistent hashing in vehicle content-centric network

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Embodiment Construction

[0038] In order to express the purpose, technical solutions and advantages of the present invention more clearly, the present invention will be further described in detail through the following examples and accompanying drawings.

[0039] A mobile-aware collaborative caching method based on consistent hashing in a vehicle-mounted content-centric network. The method includes RSU predicting vehicle movement trajectories and grouping vehicles, RSU constructing hash rings, and inserting different numbers of virtual nodes and vehicle Calculate content popularity and make caching decisions accordingly.

[0040] refer to figure 2 , the specific operation process of RSU predicting vehicle movement trajectory and grouping vehicles is as follows:

[0041] Step 1. In the warm-up phase, the RSU counts the historical moving paths of each vehicle.

[0042] Step 2. RSU traverses the historical path information of each vehicle with a sliding window of width 3, and builds a search tree with...

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Abstract

The invention belongs to the technical field of vehicle-mounted content center networks, and provides a mobile-aware collaborative caching method based on consistent hashing under the vehicle-mounted content center network. RSU predicts the most likely location of the vehicle in the next time slice according to the historical moving path of the vehicle, and then divides the vehicles that are currently in the same block and have the same predicted destination into a group. RSU uses consistent hashing to form a hash ring among the vehicles in the group and configures virtual nodes with weights, and then broadcasts the hash ring to each vehicle to form a mapping relationship between content and vehicles. Each vehicle makes a caching decision based on popularity after receiving the content, and the content mapped to the current vehicle through consistent hashing will get an additional popularity bonus. Finally, the vehicle will forward the replaced content to the appropriate neighbor nodes to share the cache load.

Description

technical field [0001] The invention relates to a mobile perception cooperative caching method based on consistent hashing in a vehicle-mounted content center network, and belongs to the technical field of vehicle-mounted content center networks. Background technique [0002] Vehicular ad-hoc network (VANET) is a special type of mobile ad-hoc network, which includes a number of fixed infrastructure and vehicles. In VANET, each vehicle can communicate with other vehicles or fixed roadside base units. In the past few decades, VANET has gradually become a source-independent content sharing platform, that is, VANET focuses more on the content itself than the actual carrier of the content. Content-oriented applications cover different fields such as entertainment, sports, shopping, etc. In order to meet the content-oriented characteristics of VANET, a new network structure - content-centric networking (CCN) is proposed. Unlike IP networks, content names are fundamental element...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/029H04W4/08H04W16/22H04W28/08H04W28/14H04W4/44H04W4/46H04W4/48H04L29/06
CPCH04W4/029H04W4/08H04W16/22H04W28/08H04W28/14H04W4/44H04W4/46H04W4/48H04L65/613
Inventor 姚琳李兆洋吴国伟
Owner DALIAN UNIV OF TECH
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