N power broadcasting method for vehicle wireless ad hoc network

A vehicle wireless and ad hoc network technology, applied in the broadcasting field of vehicle wireless ad hoc network, can solve problems such as serious conflicts, and achieve the effect of reducing the number of nodes, resolving conflicts that are still more serious, and reducing the impact

Inactive Publication Date: 2011-12-28
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a method for broadcasting to the power of N in a vehicle-mounted wireless ad hoc network, so as to solve the problem that the conflicts in the state of node saturation in the prior art based on the probability forwarding method will still be relatively serious.

Method used

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  • N power broadcasting method for vehicle wireless ad hoc network
  • N power broadcasting method for vehicle wireless ad hoc network
  • N power broadcasting method for vehicle wireless ad hoc network

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specific Embodiment approach 1

[0020] Specific implementation mode one: the following combination figure 1 This embodiment will be specifically described. In this embodiment, after receiving the broadcast data packet, each network node first inquires about the ID of the broadcast data packet to see whether the broadcast data packet 101 has been received; if it has been received, it directly discards the broadcast data packet 102; If never received, then store it and calculate the forwarding probability 103 of this network node; If the forwarding probability of this network node is greater than 1, then forward this broadcast data packet 104 to other network nodes; If the forwarding probability of this network node is less than 1, the broadcast data packet 105 is discarded;

[0021] The formula for calculating the forwarding probability of this network node is:

[0022] P i =(L ij / R) n ×100% (2-2)

[0023] where P i ——Forwarding probability of network node i;

[0024] L ij ——the distance from the re...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the value of n is 3. This value corresponds to when the congestion of vehicles on the road is not very serious and the average moving speed of the vehicles is above 5 kilometers per hour.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the value of n is 10. This value corresponds to the serious congestion of vehicles on the road, when the average moving speed of vehicles is below 1 km per hour.

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Abstract

An N power broadcasting method for a vehicle-mounted wireless ad hoc network, the invention relates to a broadcasting method for a vehicle-mounted wireless ad hoc network. It solves the defect that collisions are still relatively serious in the state of node saturation in the prior art probabilistic forwarding method. The technical scheme of the present invention is: after each network node receives the broadcast data packet, it first inquires about the ID of the broadcast data packet to see whether it has received the broadcast data packet; if it has already received it, it directly discards the broadcast data packet; if it has never been received, store it and calculate the forwarding probability of this network node; if the forwarding probability of this network node is greater than 1, then forward this broadcast data packet to other network nodes; if the forwarding probability of this network node is less than 1, the broadcast data packet is discarded; the forwarding probability calculation formula of the network node is: Pi=(Lij / R)n×100%. Used for broadcast sending of data.

Description

technical field [0001] The invention relates to a broadcasting method of a vehicle-mounted wireless ad hoc network. Background technique [0002] VANET (Vehicle Ad Hoc Network) is the application of a mobile ad hoc network between vehicles on the road. Traffic jams are a very common phenomenon in today's cities. In traffic jams, the speed of vehicles is very slow, and the traffic density is very high. In this scenario, a simple flood broadcast will generate a serious "broadcast storm", which will degrade broadcast performance and even fail to complete the transmission of information. The method for reducing "broadcast storm" in the prior art mainly reduces the generation of redundant information by reducing the forwarding of nodes. Existing methods are mainly probability-based. The content of this method is: [0003] Each node forwards the broadcast packet according to a certain probability after receiving it. That is, after each node receives a broadcast message for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W84/18
Inventor 崔刚周连科付忠传暴建民朱东杰王秀峰莫毓昌张策张必英刘永文
Owner HARBIN INST OF TECH
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