ROUTING BASED ON TRANSMISSION UTILIZATION

摘要

A method of alternative routing of a service request is described in connection with a pool 1 of integrated core network nodes (2) is described. Before a serving radio access node (4) routes a service request (12) to the core network node (2) serving a mobile station (8) it checks if there are any idle terrestrial transmission resources (5) available between the serving radio access node (4) and the serving core network node (2). If idle resources are available the service request is routed to the serving core network node (2). If no idle resources are available the service request is rerouted to a selected one of the other core network nodes (2) the pool (1) that has idle resources available. The selected core network node (2) receives the service request, recognizes it contains no temporary identification (TMSI) number associated with it and therefore sends an identity request (26) to the mobile station. The identity request triggers the mobile station initiate an update location registration at the selected core network node or at any of the other core network nodes in the pool. The selected core network node or said other network node now acts as serving core network node for the mobile station (8). Next time the mobile station makes a service request the radio access node routes it to said selected or said other network node to which it hopefully are idle terrestrial transmission resources available. The invention also refers to a radio access node (4) providing said check and to a telecommunication system provided with radio access nodes performing said check before sending the service request to the serving core network node.