Method and apparatus for ad-hoc network broadcast communication
First Claim
1. A method for wireless communication between nodes including a node moving on a road comprising the steps of:
- obtaining a node data of the first node including a position, a velocity and a moving direction of the first node;
receiving a node data of at least one second node including a position, a velocity and a moving direction from the at least one second node with using wireless communication;
calculating at lease one relative position between the first node and the at least one second node based on the node data of the first node and the node data of the at least one second node;
determining whether the road of the moving direction of the first node is congested or not, and a density of nodes when the road of the moving direction of the first node is congested, based on the node data of the at least one second node, the at least one relative position, the velocity of the first node, and the moving directions of the first node and the second node; and
starting a sending process of the node data of the first node and/or the node data of the at least one second node with a frequency set to be decreased inversely proportional to the density of nodes.
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Accused Products
Abstract
The present invention relates to a method and apparatus for reducing the number of packets in a vehicle-to-vehicle multi-hop broadcast communication. The method determines a position data comprising a position, a velocity and a direction of a receiving vehicle (1, 2, 3, 4), receives a position data comprising position, velocity and direction from sending vehicles (1, 2, 3, 4), and calculates a relative position between the receiving vehicle (1, 2, 3, 4) and the sending vehicle (1, 2, 3, 4). Next, a density of vehicles is calculated from the calculated relative positions. The position data of the receiving vehicle (1, 2, 3, 4) is periodically sent, and the time for periodically sending the position data of the receiving vehicle (1, 2, 3, 4) is set in accordance with the calculated density of vehicles.
68 Citations
14 Claims
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1. A method for wireless communication between nodes including a node moving on a road comprising the steps of:
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obtaining a node data of the first node including a position, a velocity and a moving direction of the first node; receiving a node data of at least one second node including a position, a velocity and a moving direction from the at least one second node with using wireless communication; calculating at lease one relative position between the first node and the at least one second node based on the node data of the first node and the node data of the at least one second node; determining whether the road of the moving direction of the first node is congested or not, and a density of nodes when the road of the moving direction of the first node is congested, based on the node data of the at least one second node, the at least one relative position, the velocity of the first node, and the moving directions of the first node and the second node; and starting a sending process of the node data of the first node and/or the node data of the at least one second node with a frequency set to be decreased inversely proportional to the density of nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for wireless communication between nodes included in a first node, the apparatus comprising:
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a position determining unit for determining a node data of the first node including a position, a velocity and a moving direction of the first node; a receiving unit for receiving a node data of at least one second node including a position, a velocity and a moving direction from the at least one second node with using wireless communication; a calculating unit for calculating at least one relative position between the first node and the at least one second node based on the node data of the first node and the node data of the at least one second node, and determining whether the road of the moving direction of the first node is congested or not, and a density of nodes when the road of the moving direction of the first node is congested, based on the node data of the at least one second node, the at least one relative position, the velocity of the first node, and the moving directions of the first node and the second node; and a sending unit for starting a sending process of the node data of the first node and/or the node data of the at least one second node with a frequency set to be decreased inversely proportional to the density of nodes. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification