Apparatus and method for changing subscription status of service in mobile communication system and mobile communication system thereof

A method for changing a subscription status of a service by a network entity in a broadcasting system, the method comprising:

• receiving, from a terminal, a pause request message including purchase item information that indicates at least one purchase item that a user wants to pause a subscription status of;
• and
• transmitting, to the terminal, a pause response message to the pause request message,
• wherein the muse response message includes a possible period when the user is able to pause the subscription status, and a trigger for the possible period indicating that the terminal can trigger for an update of a Long-term Key, and
• wherein the trigger for the possible period is used for changing validity for the Long-term Key.

A terminal for changing a subscription status of a service in a broadcasting system, the terminal comprising:

• a transmitter for transmitting to a network entity a pause request message including purchase item information indicating at least one purchase item that a user wants to pause a subscription status of;
• a receiver for receiving, from the network entity, a pause response message to the pause request message, the pause response message including a possible period when the user is able to pause the subscription status, and a trigger for the possible period indicating that the terminal can trigger for an update of a Long-term Key;
• and
• a controller for changing the subscription status by changing validity for the Long-term Key using the trigger for the possible period.

A network entity for changing a subscription status of a service in a broadcasting system, the network entity comprising:

• a receiver for receiving, from a terminal, a pause request message including purchase item information that indicates at least one purchase item that a user wants to pause a subscription status of;
• and
• a transmitter for transmitting, to the terminal, a pause response message to the pause request message,
• wherein the pause response message includes a possible period when the user is able to pause the subscription status, and a trigger for the possible period indicating that the terminal can trigger for an update of a Long-term Key, and
• wherein the trigger for the possible period is used for changing validity for the Long-term Key.