UAV-Aided Data Delivery Scheme Based on Opportunistic Virtual Intersections for Smart Transportation Networks

Algorithm 1

UADD Packet Forwarding Algorithm.

1: Forwarding At Intersections:

2: Assign road segments connected to the intersection with priorities according to .

3: Forwarding the packet to the vehicle according to the priorities.

4: Forwarding At Opportunistic Virtual Intersections.

5: Determine the optimal next-intersection .

6: Determine and based on .

7: if and then.

8:  Forwarded packet to only if can work in relay mode and relay the packet to the vehicle ahead along the direction of .

9: else if and then.

10:  Forwarded packet to .

11: else if and then.

12:  Forwarded packet to only if can work in relay mode and relay the packet to the vehicle ahead along the direction of .

13: else

14:  Calculate the packet delivery probability and expected packet delay of both and .

15:  Forward to if (4) is satisfied or can work in relay mode and relay the packet to the vehicle ahead along the direction of .

16: end if