COMMUNICATION METHOD AND APPARATUS IN MOBILE TELECOMMUNICATION SYSTEM

The invention provides a communication method performed by a mobility management entity, MME, in a mobile communication system, the method comprising: receiving, from a terminal, a first request message including identification information related to the terminal, the first request message being an attach request message or a tracking area update request message; identifying a type of an old network node based on a bit in the first request message; and transmitting, to the old network node, a second request message to request information associated with the terminal based on the type of the old network node. The invention further provides a corresponding MME.