Abstract: A method and a system for dynamic assignment of a serving network node in a communications network, preferably an IMS-based communications network, are described, wherein the communications network comprises a predetermined number of serving network nodes and wherein the method comprises: receiving a service request associated with a user equipment, another network or a network node, preferably an application server; providing load information associated with said serving network nodes; and, in response to said service request, assigning one of said predetermined number of serving network nodes to said user equipment, said other network or said network node on the basis of said load information.