Patent ID: 7296075

Claim:
A method for connecting a portable unit to a particular server unit from among a plurality of server units, the portable unit comprising a first address list and the particular server unit comprising a second address list, the first and the second address lists including an attribute of at least one of said plurality of server units and an address of the at least one server unit, comprising the steps of: recording a required attribute of a server unit, by electronically recording, using the portable unit, on a base provided with a subset of a position-coding pattern that codes coordinates on an imaginary surface, a pair of coordinates in a first partial area from among a plurality of partial areas on the imaginary surface, which partial area is associated with the required attribute; searching for the recorded attribute in the first address list; if the recorded attribute is found in the first address list, connecting the portable unit to the required server unit via the address in the first address list that is associated with the recorded attribute; updating the second address list from the first address list; and updating the first address list from the second address list.