1. A method, comprising: detecting in a mobile node or in a mobile proxy server, from application context information on the mobile node, a first set of capabilities of a network node that facilitate maintaining an internet protocol session of an application, the first set of capabilities being a subset of a defined system set of capabilities; querying from a potential next network node capability information on the first set of capabilities; and determining applicability of the potential next network node for supporting a relocation of the internet protocol session of the mobile node by the capability information on the first set of capabilities during a network layer handover in a mobile communication system, the mobile communication system being configured to provide the defined system set of capabilities that are fully or partially supported by network nodes of the mobile communication system.