Research Article

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

Algorithm 2

Vertical handover using cooperative relaying.
/Received Signal strength indication, signal to noise ratio, Channel state information parameters, inter UAV distance inputs are given to Algorithm 2 for handover triggering. /
(1)Monitor RSSI, SNR, and CSI and inter UAV distances (Source to relay, relay to destination)
//Handover Triggering based on Distance and RSSI-based information //
(2)  if (Distance between UAV || RSSI) < D threshold ||(RSTh) then
(3)  Initiate vertical handover
(4)  Select Relay at location Ci[m + 1];
(5)  Request Base Station (BS) to reserve slot for node U0;
(6)  BS reply to Ui with reserve slot for U0;
(7)  end if
(8)  else if U0 also Compute BS > RSSI threshold
(9)  U0 send vertical handover request through Ui
(10)  BS allocate resource to Uo on behalf of Ui
(11)  Confirmation sent to relay node Ui and source node U0
(12)  U0 initiate authentication
(13)  BS responds to authentication
(14)  U0 send confirmation message to relay node
(15)  end if