METHOD AND APPARATUS FOR PROVIDING CIRCUIT SWITCHED DOMAIN SERVICES OVER A PACKET SWITCHED NETWORK

摘要

A method of determining a domain mode for a mobile station is described. A first domain mode is determined. A determination is made whether to rove from the first domain mode to a second domain mode according to predefined roving criteria. A method of performing Packet Mobile Switching Center discovery for a mobile station is also described. A Fully Qualified Domain Name is derived based on a cell identifier of a current cell. The derived Fully Qualifed Domain Name is used to determine an Internet Protocol Address of a Packet Mobile Switching Center