Wireless Communications and Mobile Computing

Research Article

Offloading Cost Optimization in Multiserver Mobile Edge Computing Systems with Energy Harvesting Devices

Algorithm 1

Lyapunov-based computation offloading algorithm.
Input:, , , , ,,, .
Output: The offloading strategy of different edge devices.
for each time slot do
  for each device m with , harvest all the energy and update .
  end for
  for each device with do
   obtain and , then compute .
   if, use for local computing.
    harvest all the energy , store it in battery, and update .
   else compute according to (2),(3),(5) and (6).
    for all the , device do
     solve ,
     obtain and accordingly,
     compute .
    end for
    find minimum element in , s.t.(13).
    if the element is , choose sever and use to offloading tasks.
    else if the element is , use for local computing.
    else drop the tasks.
    end if
    harvest all the energy, and update .
   end if
  end for
end for