A Novel Nonlinear Multitarget -Degree Coverage Preservation Protocol in Wireless Sensor Networks

Algorithm 1

() Input , , , // Initialize the number of sensor nodes, perception radius, sensor nodes energy

and the energy threshold value.

() CL = Null

() , , , // loop variables

() While ()

() () = // calculating the coverage expectation values of node members

() While () // After one or a few rounds

() 

()   if ( Coverage) // the administrator node receives “Coverage” message

()  CL[].date = Coverage

() ++

()                  

() Sort_order (CL[.data) // sorting the member nodes

() While () // determining the optimal coverage set

()    

()   if () // node residual energy is less than node threshold energy

()    Notice // the administrators sends “Notice” to the member nodes

()   Coverage() ← // node members complete covering the target nodes

()        

() 

() While ()

()    

()   if (CL[].data CL[].data)

()    

()   Close (CL[].data)

()   ++

()                

() else

() return ()

()