Vehicle group cooperative transmission method with caching capability under the Internet of Vehicles

Abstract

The invention discloses a grouping cooperative transmission method of vehicles with a caching capability in the Internet of Vehicles environment. The grouping cooperative transmission method comprises the steps of: step 1, grouping the vehicles on roads and performing group maintenance; step 2, acquiring cache data by adopting a request feedback method; step 3, and adopting an LRU cache replacement and updating strategy. The grouping cooperative transmission method utilizes a V2V communication method to combine with the vehicles with the cache capability, adopts the transmission method of grouping cooperation and updates data of node cache regularly, thereby being capable of improving stability of the transmission process and reducing network service cost, significantly reducing redundant network forwarding, reduce network delay, making data more efficient in the forwarding process, and ensuring the timeliness and usefulness of local cache data.

Description

technical field [0001] The invention relates to a vehicle group cooperative transmission method with caching capability under the Internet of Vehicles environment, belonging to the field of vehicle communication. Background technique [0002] With the rapid development of mobile networks and dedicated short-range communication technology (DSRC, a short-range communication that operates in the authorized 5.9GHz frequency band under the IEEE 802.11p standard, generally within 100-500 meters), vehicle ad hoc networks (VANETs ) has become a promising field in wireless communication where vehicles can now communicate directly in a vehicle-to-vehicle (V2V) manner or in a vehicle-to-existing RSUs (V2R) or roadside unit-to-vehicle (R2V) way of communication. And with the rapid development of information technology, people's daily life is increasingly inseparable from the Internet. Watching entertainment videos, watching popular movies or listening to popular songs has become a way ...

AI Technical Summary

Problems solved by technology

[0006] In order to more effectively solve the problem of flooding the entire network during the forwarding process of interest packets and data packets, the present invention considers adding an interest-based grouping algorithm on the basis of traditional grouping based on vehicle position, moving speed and direction, which can not only solve the problem of high-speed moving The problem of intermittent interruption of vehicle node communication can also make nodes with the same hobbies form a group. Most of these nodes store similar types of data files (popular movies or pop music, etc.), so that the cached data in the group is in the group. Internal broadcasting is more purposeful, reducing redundant network broadcasting, and the nodes in the group are coordinated by the group leader to avoid repeated replication of cached data

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