1. Intelligent Wireless Ad Hoc Routing Protocol and Controller for UAV Networks
Abhinandan Ramaprasath, Anand Srinivasan,
Chung-Horng Lung, and Marc St-Hilair

2. Motivation

3. Problems - UAV-UAV communication
Find optimal routes to reach the destinations
Use multiple disjoint routes simultaneously in order to improve throughput
Prioritize packets and send them through the network on the shortest path
Integrate support for priority packets in lower network layers

4. Problems - UAV - User communication
Roaming between APs without losing connectivity
Load balancing traffic as evenly as possible across the network

5. Objectives
Create an approach able to address all the important features that are encountered in disaster scenarios:
Redundancy
Packet prioritization
Optimal throughput
Improve the UAV to user connectivity

6. Proposed Approach Two communication devices in each UAV
UAV-UAV communication
UAV-User Communication
The deployment of the UAVs are predefined
The Sink contains the controller
The controller receives the link quality

7. Proposed Approach

8. Priority Levels
Priority control packets: packets with the highest priority
Non-priority control packets: control packets sent to the controller at regular intervals (every 30 s for example).
Priority data packets: Priority data packets.
Non-priority data packets: Non-priority data packets.

9. Network Setup and Discovery

10. UAV-UAV Communication
The control messages initially use AODV
Once a packet is queued at a UAV, an RTS packet is generated
According to the priority level of the packet
It waits for a CTS packet with a certain timeout
If the timeout is exceeded
The RTS/CTS communication is restarted using the alternate route
A UAV marked as lost
The routes are periodically updated.

11. Performance Evaluation
Performed using Ns-3 simulator
Comparison: OLSRv2, AODV
Nº of UAVs: 1, 2, 5, 10, 20, 100, 500, 100
UAV-UAV communication frequency: 1000MHz
Adaptive modulation

12. 1 - Experiment setup

15. 2 - Experiment setup

17. Priority Packets

18. Conclusion
The proposed UAV-UAV communication is scalable, efficient provides and supports packets with different priority levels
The routes communicated by the controller provide a means to distribute traffic throughout the network evenly, increasing the global efficiency of the network
The simulation results showed improved throughput and reduced latency for critical packets