A method and implementation are disclosed for binding a mobile node to a subnet. The method introduces a reactive agent into the container after filling and before sealing. If the number of rows is equal to the number of columns, then diagonal sweeping is performed including passing data diagonally across each of the rows and columns of wireless devices to an end wireless device in each row and each column. The wheels drop into an opening that restricts movement from front to back and from left to right. After receiving each associated block transfer command, a safe region for an associated block transfer command will be determined in real time.