AirCache: A Crowd-Based Solution for Geoanchored Floating Data

Algorithm 1

Slot status computation.

       input: FrameInformation (LocalFI), ReservationBoard (ReservationBoard), Received

       FrameInformation(s) (ReceivedFIs), Local Node Identifier (NodeId)

       output: Updated ReservationBoard and FrameInformation

()    bool Collision False, Owned False;

()    int Position −1; BCH Channel ;

()    for    to  Length(LocalFI)  do

()     BCH Heard BasicChannel(LocalFI, );

()     foreach    in receivedFIs  do

()      Position Shift(, );

()      Channel BasicChannel(, position);

()      Collision False;

()      Owned Owner(Channel);

()   if  Owned and NotSameId(Channel, Heard)  then

()    Collision True;

()    break;

()   end

()  end

()  if  Collision  then

()   UpdateBoard(Reservationboard, , Free);

()   UpdateFI(LocalFI, , Free);

()   if   = Id(Heard)  then

()    Collision(True);

()    EnterContention();

()   end

()  else

()   if  (AdditionalAndExpired(Channel))  then

()    UpdateBoard(board, , Free);

()   else

()    UpdateBoard(board, , Reserved);

()   end

()  end

() end