Method for discovering neighbor nodes in vehicle self-organizing network

A technology of neighbor node discovery and self-organizing network, which is applied in the field of communication, can solve problems such as inability to adapt to changes in the topology of the self-organizing network of vehicles, and achieve the effects of small communication costs, fairness assurance, and small calculation costs

Inactive Publication Date: 2013-09-11
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the vehicle ad hoc network, there are currently three methods for neighbor node discovery as follows, but each method has its own disadvantages: (1) Periodically and

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  • Method for discovering neighbor nodes in vehicle self-organizing network
  • Method for discovering neighbor nodes in vehicle self-organizing network
  • Method for discovering neighbor nodes in vehicle self-organizing network

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Embodiment Construction

[0025] The present invention is a method for discovering neighbor nodes in a vehicle ad hoc network, which adopts an adaptive strategy. The two key issues are: how to adaptively determine the number of time slots in a time frame, and how to determine the number of time slots in a time frame The number of times the beacon is sent.

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] first combined with figure 1 Describe in detail how to determine the number of time slots in a time frame. Divide the day into periods of time. According to historical information statistics, the vehicles in the network obtain the traffic flow density of the road section in the time period, and obtain the average number of neighbors of the vehicle in the road section in the time period. According to the traffic density of the road section where the time period is located, the number of time slots in a time frame is set for the ve...

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Abstract

Disclosed is a method for discovering neighbor nodes in a vehicle self-organizing network. A vehicle in the network sends a beacon as follows: time is divided into time frames one by one, and each time frame is provided with a plurality of time slots; the number of the time slots in each time frame is set by the vehicle according to the traffic stream density in a road segment, and whenever a novel road segment is driven in, the vehicle resets the number of the time slots in each time frame according to the traffic stream density in the novel road segment; the beacon sending frequency is randomly set by the vehicle in a first time frame; when a novel time frame starts, and the vehicle selects another vehicle to be used as a reference vehicle according to received information in a previous time frame and calculates the sending frequency of the time frame according to the number of neighbors of the reference vehicle and the number of the time slots of the time frame; corresponding time slots are randomly selected according to the calculated sending frequency, the beacon is sent in a selected time slot, and the rest time slots are not used for sending the beacon. By means of the method for discovering the neighbor nodes in the vehicle self-organizing network, neighbor delay discovering can be reduced, fair neighbor node discovering can be guaranteed as well, and therefore the method is suitable for any vehicle self-organizing network.

Description

technical field [0001] The invention relates to a mechanism for discovering neighbor nodes in a network, in particular to a method for discovering neighbor nodes in a vehicle self-organizing network based on adaptive control beacon transmission, and belongs to the field of communication technology. Background technique [0002] In 1999, the Federal Communications Commission of the United States allocated the 75MHz frequency band as a dedicated short-range communication frequency band to support communication between vehicles and between vehicles and roadside infrastructure. When two vehicles are within the communication distance of each other, the two vehicles are neighbors, and the two vehicles that are neighbors can send and receive messages to each other. The so-called neighbor node discovery has two meanings: (1) When vehicle A enters the communication distance range of vehicle B, vehicle B discovers the arrival of vehicle A; (2) when vehicle A leaves the communication d...

Claims

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Application Information

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IPC IPC(8): H04W48/08
Inventor 邓左祥朱燕民李明禄
Owner SHANGHAI JIAO TONG UNIV
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