Communication system, communication control apparatus, node apparatus, and communication method for performing load balancing in a system

A node apparatus for relaying user data of a communication terminal, the node apparatus comprising:

• a receiver configured to receive, from a communication apparatus that performs mobility management of the communication terminal, identification information on the communication apparatus and information on a timer, wherein the timer is used for uninstalling the communication apparatus;
• and
• a processor configured to release a connection related to the communication apparatus based on the information on the timer.

A method of a communication apparatus for performing mobility management of a communication terminal, the method comprising:

• sending identification information on the communication apparatus and information on a timer, wherein the timer is used for uninstalling the communication apparatus, to a node apparatus for relaying user data of the communication terminal;
• and
• uninstalling the communication apparatus based on the information on the timer.

A method of a node apparatus for relaying user data of a communication terminal, the method comprising:

• receiving, from a communication apparatus for performing mobility management of the communication terminal, identification information on the communication apparatus and information on a timer, wherein the timer is used for uninstalling the communication apparatus;
• and
• releasing a connection related to the communication apparatus based on the information on the timer.