Unmanned aerial vehicle ad hoc network cooperation time division channel access method based on dynamic relay selection

Abstract

The invention discloses an unmanned aerial vehicle ad hoc network cooperation time division channel access method based on dynamic relay selection. According to the method, firstly, a double-queue cooperation mechanism is designed for the unmanned aerial vehicle ad hoc network node relay data packet transmission process, and an independent MAC layer relay data packet buffer queue is introduced outside a network layer data packet buffer queue. Then, a default relay node and an auxiliary relay node are dynamically selected on the basis, so that the requirements of large-flow load and rapid change of network topology are met. Finally, the method is realized under a time division multiple access protocol framework. A simulation result in a wireless network simulation environment EXata shows that a high relay data packet delivery rate and low end-to-end time delay can be obtained by the provided cooperative time division channel access method through a relay node dynamic selection mechanism under the conditions of relatively large network service flow load and rapid network topology change.

Description

technical field [0001] The invention belongs to the field of wireless networks, and in particular relates to a method for accessing cooperative time-division channels of an unmanned aerial vehicle ad hoc network based on dynamic relay selection. Background technique [0002] UAV self-organizing network has the advantages of distributed, self-organizing, multi-service and long-distance, and is widely used in military and civilian fields. In the actual application process, the characteristics of highly dynamic topology changes and complex and harsh battlefield environments pose a serious threat to the communication quality of UAV Ad Hoc Networks. The method of using idle or redundant nodes in the network for cooperative transmission can effectively improve the communication performance of the network. This method is called node cooperation strategy. The medium access control protocol of the UAV ad hoc network data link layer determines the channel access mode of nodes, which ...

AI Technical Summary

Problems solved by technology

However, in practical applications, the UAV ad hoc network has the characteristics of high-speed node movement and dynamic topology changes, which poses new challenges to the design of cooperative relay forwarding media access control protocols.

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