Node transmission capability based vehicular spray and focus routing protocol method

A routing protocol, node transmission technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of reducing the effective utilization of the cache and losing the opportunity to receive messages.

Active Publication Date: 2016-12-07
SUN YAT SEN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

When the storage space of the node is limited, the effective utilization of the cache may be red

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  • Node transmission capability based vehicular spray and focus routing protocol method
  • Node transmission capability based vehicular spray and focus routing protocol method
  • Node transmission capability based vehicular spray and focus routing protocol method

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Embodiment Construction

[0071] The accompanying drawings are for illustrative purposes only, and should not be construed as limiting the patent. The present invention will be further described below in conjunction with the accompanying drawings.

[0072] A vehicle-mounted distribution-focused routing protocol method based on node transmission capability, comprising the following steps:

[0073] Step 1: Each vehicle node maintains a collection of historical encounter nodes. When a new node is encountered, the ID and encounter time of the node are added to the collection. If the two nodes meet again in a short period of time, the encounter time is updated. If the time does not meet the node, the corresponding record is deleted from the collection. The node periodically compares the set of the current cycle start time and the current time, and calculates the rate of change of the meeting node. In addition, each node simultaneously records information such as its driving speed and remaining cache size. ...

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Abstract

The invention provides a node transmission capability based spray and focus routing protocol method. The method comprises a multi-copy spray stage and a single-copy focus stage. The multi-copy spray stage indicates that possible routes are searched by spraying the message copies to a network when a node owns multiple copies of a certain message. According to the method, the transmission capabilities of nodes for the messages are measured through factors such as the vehicle speed, change rates of encountering nodes and residual cache sizes, and message spray tasks are allocated proportionally according to the transmission capabilities. The single-copy focus stage indicates that the node is allowed to forward the unique message copy to a relay node with the transmission capability higher than that of the node when the node owns the copy of a certain message. The forwarding of the message is controlled by taking the node transmission capability as a comparison condition. According to a cache management strategy designed by the method, the redundant messages are eliminated through adoption of a delivery message confirmation mechanism; and the sending sequence of the messages is determined by taking the residual survival time of the messages and the number of the copies capable of being copied as message allocation priorities.

Description

technical field [0001] The invention relates to the field of vehicle ad hoc routing protocol vehicle ad hoc network and opportunistic network technology, and in particular to a vehicle distribution focus routing protocol method based on node transmission capability. Background technique [0002] Vehicular Ad-hoc Network (VANET) is one of the most promising fields of mobile ad-hoc network at present, and its technical development is of great significance to the construction of intelligent transportation system. As the key technology of network interconnection and data exchange, the routing protocol determines the performance of the entire vehicle ad hoc network to a certain extent. Due to the characteristics of fast node movement, frequent topology changes, and unguaranteed end-to-end paths in vehicular ad hoc networks, it is difficult for traditional ad hoc network routing protocols to play a role in vehicular scenarios. The opportunistic network is a self-organizing networ...

Claims

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Application Information

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IPC IPC(8): H04L12/721H04L12/725
CPCH04L45/302H04L45/32
Inventor 周杰英许杨鹏刘映淋彭石黄正
Owner SUN YAT SEN UNIV
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