1. A method comprising:selecting a signature;
transmitting a preamble using the signature;
receiving, on an acquisition indicator channel (AICH), a signal including an acquisition indicator, wherein the acquisition indicator corresponds to the signature;
calculating a default E-DCH resource index X as X=Dind mod Y, wherein the Dind is an index of the signature and the Y is a total number of E-DCH resource configurations; and
controlling an E-DCH transmission based on the default E-DCH resource index X, in a case where the acquisition indicator is positive.