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. 2020 Feb 14;20(4):1025. doi: 10.3390/s20041025
Algorithm 2 Forwarding Mode Switch
Input: the packet p received by node ni
Output: greedy mode or void recovery mode
  • 1:

    node ni updates p with di

  • 2:

    ni.void-flag=0

  • 3:

    BroadcastFlag=True // indicate that whether or not node ni transmits p

  • 4:

    RecoveryFlag=True // indicate whether to activate void recovery mode or not

  • 5:

    while (BroadcastFlag) do

  • 6:

     ni broadcasts p and set a specific timer

  • 7:

      while (timer is not expired) and (RecoveryFlag) do

  • 8:

       overhear the channel

  • 9:

       if ni overhears p being transmitted then

  • 10:

        RecoveryFlag=False

  • 11:

       end if

  • 12:

      end while

  • 13:

    if (RecoveryFlag) and (!ni.void-flag) then //overhear no transmission of p within its

         //timer and it is the first time to activate the void recovery mode

  • 14:

     set ni.void-flag to 1

  • 15:

    else

  • 16:

     drop the packet p

  • 17:

     BroadcastFlag=False

  • 18:

    end if

  • 19:

    end while