Reducing signaling load caused by change of terminal location

A method in a mobility management node for reducing signalling caused by changes of location of a radio terminal, which mobility management node is configured to be operatively comprised by a wireless communication system and to operatively manage the mobility of the radio terminal and to operatively communicate with a gateway node acting as an interface between the system and an external network, wherein the method comprises:

• obtaining initial position information indicating an initial position for the radio terminal;
• obtaining boundary information based on the initial position information, which boundary information indicates a boundary area wherein at least one of a policy or a charging rule is to be applied for the radio terminal, wherein the boundary information is obtained by:
• sending a request message to one or more of the gateway node and a Service Aware Charging and Control (SACC) node of the system indicating that boundary information is requested;
• and
• receiving a response message from the gateway node and/or the SACC node, which response message comprises the boundary information;
• obtaining current position information indicating the current position of the radio terminal;
• determining whether the radio terminal is inside or outside the boundary area based on the boundary information and the current position information;
• and
• providing mobility information, indicating the current position of the radio terminal, to the gateway node when the radio terminal is outside the boundary area and not providing mobility information to the gateway node when the radio terminal is inside the boundary area.