[Retracted] A Novel Cooperative Relaying-Based Vertical Handover Technique for Unmanned Aerial Vehicles

Algorithm 1

Relay selection and deployment.

	//Relay node Selection and deployment//
	Input: Relay Node Location R (XR, YR), Relay Pool (U = 1, 2, 3, …, n), RSSI Threshold (RSTh), Inter UAV Distance (DUo, DU1, DUn), SNR
	Output: Optimal vertical handover Success rate (VHOSuccess Probability), 0 ≤ VS ≤ 1
(1)	Initialize periodic time = ∆t;
(2)	for each m ϵ [0, M] do
(3)	if i = 0 then
(4)	Compute Source node location and velocity (C0 [mth Slot], V0[mth slot]);
(5)	Deploy relay node at C0 (m + 1);
(6)	if Update message of relay fails then
(7)	Pick another Relay node from pool Ui; Tupdate
(8)	Update Tupdate = t;
(9)	endif
(10)	elseif i ϵ [1, n] then
(11)	Get update message from source node U0;
(12)	Compute Ci [m + 1];
(13)	Synchronize Trajectory along Source node
(14)	endif
(15)	end for