METHODS AND APPARATUS FOR ENABLING CIRCUIT-SWITCHED SERVICES

摘要

A first mobility management (MM) message is transmitted from a user equipment (10) to a core network that includes packet-switched (PS) and circuit-switched (CS) domains. The first MM message is transmitted (42) to a PS-domain component, and a rejection message is received (44) from the PS-domain component in response thereto. The rejection message indicates congestion as a cause for rejection of the first MM message, and also indicates whether circuit-switched services are permitted or forbidden.