1. A method, including: receiving a ranging request message with a sleep-mode indication from a mobile node at a destination base station in a wireless packet-switched network (WPSN), wherein no service context associated with the mobile node exists at the destination base station at a time of receiving the ranging request message; determining a base station identifier (BSID) associated with an originating base station from system paging information, wherein the originating base station last served the mobile node; and contacting the originating base station to retrieve a service context associated with the mobile node and to retrieve any downlink packets buffered for the mobile node by the originating base station.