1. A method for dynamic bus setup of a connection between a sending unit and a receiving unit over one of a plurality of possible paths, each path traversing a plurality of intermittent units, one of the sending unit and the receiving unit being initially considered as a starting unit, the method comprising: (a) for each starting unit, until a desired path is completed: (i) sending an inquiry for determining which of a plurality of units surrounding the starting unit are available for the setup; and (ii) for each surrounding unit determined to be available, assigning a corresponding code number; and (b) for each one of a plurality of surrounding units assigned a code number, considering the one unit as the starting unit for repeating step (a).