A communication system including a radio network controller (RNC) and a base station (NodeB) is disclosed. The RNC sends to the NodeB a message for configuring or reconfiguring an enhanced dedicated channel (E-DCH) related resource. The E-DCH related resource corresponds to an E-DCH as a common transport channel. The message includes a signature list including a preamble signature for a random access request, E-DCH physical layer information, and a transmission bearer parameter. The NodeB configures or reconfigures the E-DCH related resource according to the message. The configuration or reconfiguration is performed before the NodeB receives, in accordance with part or all of the configured or reconfigured E-DCH related resource, a random access request from a user equipment (UE). The NodeB sends a response to the RNC, including information about the E-DCH related resource that is configured or reconfigured by the NodeB according to the message.