Method for assigning IP address to mobile node in code division multiple access system

A method for assigning an Internet protocol address to a mobile node in a mobile communication system, comprising the steps of:

• storing, by a database, identification information of said mobile node and grades of mobile nodes indicating a grade of qualification for assignment of the Internet protocol address;
• storing, by a mapping table, Internet protocol addresses to be assigned, corresponding to the identification information of said mobile node;
• when an Internet protocol address assignment request associated with an arbitrary mobile node is received, identifying the grade of said mobile node to be assigned to said mobile node and specific information of said mobile node from said database;
• and
• selecting an Internet protocol address to be assigned to said mobile node from a mapping table according to the grade of said mobile node.

A system for assigning an Internet protocol address, comprising:

• a computer readable medium;
• a processor connected to said computer readable medium, said processor programmed to:
• storing, by a database, identification information of said mobile node and grades of mobile nodes indicating a grade of qualification for assignment of the Internet protocol address;
• when an Internet protocol address assignment request associated with an arbitrary mobile node is received, identifying a grade of a mobile node from a database;
• selecting an Internet protocol address pool from Internet protocol address pools of various grades on the basis of the grade of said mobile node, the Internet protocol address pools containing assignable Internet protocol addresses;
• and
• selecting an Internet protocol address from the Internet protocol address pool and assigning the selected Internet protocol address to said mobile node.