Adaptive method and system specific to intermittently-connected unmanned aerial vehicle Ad hoc network

Abstract

The invention provides an adaptive method and system specific to an intermittently-connected unmanned aerial vehicle Ad hoc network. The adaptive method comprises the following steps: S1, initializingparameters; S2, dynamically updating the positions and velocity vectors of nodes; S3, randomly selecting a source node and a destination node to obtain the position of the destination node, and starting to forward a data packet from the source node to the destination node; and S4, selecting a forwarding node for forwarding the data packet according to a mobility auxiliary route forwarding strategy till the data packet arrives at the destination node. According to the adaptive method and system, the positions of neighbor nodes and all nodes in the network are updated respectively through a dynamic position updating strategy, so that the overhead is reduced greatly, and meanwhile relatively high real-time performance is achieved. On the other hand, the data packet is transmitted to the destination node by means of the mobility of the nodes through the mobility auxiliary route forwarding strategy, so that the data packet discarding probability due to intermittent connection is lowered, and the data packet transmission rate is increased effectively.

Description

technical field [0001] The present invention relates to an unmanned aerial vehicle ad hoc network, in particular to an adaptive method for intermittently connected unmanned aerial vehicle ad hoc network, and to the self-organizing network for intermittently connected unmanned aerial vehicle ad hoc network An adaptive system that adapts to methods. Background technique [0002] In actual application scenarios, such as earthquake search and rescue, forest survey and military network, multiple drones search a target area at the same time (the target area is very large), the density of drones is small, and they have high-speed mobility. It often occurs that the communication link between nodes is disconnected or there is no complete path from the source node to the destination node. We call this network composed of a series of incoherent time-varying node sets intermittently connected unmanned machine self-organizing network. [0003] Existing UAV ad hoc network routing protoc...

AI Technical Summary

Problems solved by technology

It first needs to use other location information service mechanisms to obtain the location information of the destination node before sending the data packet to the destination node, which will not only increase the delay of sending the data packet, but also is not conducive to updating the location of the destination node during data forwarding

[0010] 2. The mobility of the destination node is not considered

In the UAV self-organizing network, the UAV nodes have high-speed mobility, and it is very likely that the location of the destination node has changed greatly during the data packet forwarding process. Outdated location information will cause the data packet to fail to be successfully transmitted to the destination node. node

[0011] 3. When there are no neighbor nodes around the node holding the data packet and there is no way to forward it, the node will directly discard the data packet

For intermittently connected drone self-organizing networks, this happens from time to time, so a large number of data packets will be discarded, which will obviously greatly reduce the sending rate of data packets

[0012] Therefore, in order to pursue a higher success rate of message delivery and a smaller transmission delay, the traditional intermittent network routing algorithm usually forwards a large number of messages, which will cause more redundant messages in the network, making these redundant messages The forwarding of redundant messages has become a prominent problem of increasing network load and too many redundant messages

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