A mobile station serves as an aggregation point for connecting one or more peripheral devices to a Public Data Network through the mobile station's wireless link to a supporting wireless communication network. In an exemplary embodiment, the mobile station establishes a single PPP session with the network that includes a primary service instance for itself and an auxiliary service instance for each locally attached peripheral device. As such, the mobile station and the one or more locally attached peripheral devices share a single PPP session, permitting each device to have its own IP address and allowing the mobile station to provide Mobile IP messaging relay between Mobile IP clients in the attached devices and the supporting network. With this arrangement, the mobile station avoids IP packet routing overhead by directing traffic to the appropriate peripheral device using the service instance identifiers marking the packet data traffic received from the network.