Dynamic routing method of three-dimensional heterogeneous network in emergency scene based on unmanned aerial vehicle

Abstract

The invention discloses a dynamic routing method of a three-dimensional heterogeneous network in an emergency scene based on an unmanned aerial vehicle. The method can adapt to a fusion network with dynamic topology change; an unmanned aerial vehicle is used as a relay node to form the relay node; nodes in the same area are not communicated; node communication in different areas is relayed and routed through unmanned aerial vehicle nodes; ground nodes are only used as tail end nodes in routing. In each communication process, the method comprises the steps that A scene modeling is conducted onthe unmanned aerial vehicle nodes and the ground nodes respectively; B a link weight is improved on the basis of a traditional OLSR protocol, and a routing path is selected by taking cost = alpha * ETT + beta * Ei + (1-alpha-beta) * T as a reference; and C the core idea of the OLSR routing protocol is to select an MPR set to reduce the routing overhead, and the improved LBMRE-OLSR abandons a classical MPR set selection algorithm to select the MPR set based on the node expected transmission time, the node energy and the node congestion degree.

Description

technical field [0001] The invention belongs to the technical field of network communication, and specifically relates to a dynamic routing method of a three-dimensional heterogeneous network in an emergency scene based on an unmanned aerial vehicle. Routing with frequent changes in dynamic topology in emergency scenarios reduces end-to-end delay, lowers packet loss rate and solves network congestion problem at the same time. Background technique [0002] In the case of sudden natural disasters and public events, multiple nodes communicate at the same time, the ground communication facilities may be destroyed, the ground network will be severely congested, and the original communication method is difficult to continue to connect, so communication in emergency scenarios is particularly important . The space-space-ground integrated heterogeneous network can solve the problem of network congestion and it can make the network have wider coverage, better connectivity, and strong...

AI Technical Summary

Problems solved by technology

[0007] 1. The "integrated" routing of the air-space-ground network in the true sense has not been realized, and more is hierarchical routing

[0008] 2. The random movement characteristics of UAVs in the near-space network are not fully grasped, and the routing protocol used cannot realize the dynamic changes of the network topology well.

[0009] 3. Multi-dimensional resources between different layers (including link state and node state) are not taken into account when routing

[0010] 4. The routing in the traditional mobile ad hoc network is not suitable for high-speed mobile UAV nodes and UAV networks with frequent topology changes

Images