Method for using a unique IP address in a private IP address domain

• US 20020038382A1
• Filed: 08/30/2001
• Published: 03/28/2002
• Est. Priority Date: 09/08/2000
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Gi-Sik, Ryu, Young-Gyu
• Granted Patent: US 7,281,059 B2
• Time in Patent Office: Days
• US Class Current: 709/238
• CPC Class Codes: H04L 2101/604 Address structures or formats
• CPC Class Codes: H04L 2101/663 Transport layer addresses, e.g. aspects of transmission control protocol [TCP] or user datagram protocol [UDP] ports
• CPC Class Codes: H04L 61/2514 between local and global IP addresses
• CPC Class Codes: H04L 61/2564 for a higher-layer protocol, e.g. for session initiation protocol [SIP]
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• CPC Class Codes: H04L 61/5061 Pools of addresses

Abstract

Disclosed is a method for using a unique IP address for a limited period of time in a device connected to a LAN which includes a router and a LAN device. In the method, the LAN device sends a unique IP address request to the router to be allocated a unique IP address, when the LAN device needs a unique IP address. The LAN device returns the allocated unique IP address to the router after using the allocated unique IP address.

Claims

1. A method for using an IP (Internet Protocol) address on a LAN (Local Area Network) including a router and a LAN device, the method comprising the steps of:

sending a unique IP address request from the LAN device to the router to be allocated a unique IP address, when the LAN device needs a unique IP address; and

returning the allocated unique IP address from the LAN device to the router after using the allocated unique IP address.

2. The method as claimed in claim 1, further comprising the step of the LAN device informing the allocated unique IP address, when it is necessary for an application performed in the LAN device to inform the other party of its own IP address.

3. A method for using an IP address on a LAN including a router and a LAN device, comprising the steps of:

providing a dynamic unique IP address pool in the router having unique IP addresses which are not statically allocated to a specific LAN device;

allocating the unique IP address of the dynamic unique IP address pool upon receipt of a unique IP address request from the LAN device; and

the router adding the allocated unique IP address returned from the LAN device to the dynamic unique IP address pool.

4. A method for using an IP address on a LAN including a router and a LAN device, comprising the steps of:

sending a unique IP address request from the LAN device to the router to be allocated a unique IP address, when the LAN device needs a unique IP address;

providing a dynamic unique IP address pool in the router having unique IP addresses which are not statically allocated to a specific LAN device;

allocating the unique IP address of the dynamic unique IP address pool upon receipt of a unique IP address request from the LAN device;

returning the allocated unique IP address from the LAN device to the router after using the allocated unique IP address; and

the router adding the allocated unique IP address returned from the LAN device to the dynamic unique IP address pool.

5. A system for using an IP address on a LAN, which comprises:

a LAN device, connected to a router, for sending a request for an unique IP address to the router, receiving an allocated unique IP address from the router, and returning the allocated unique IP address to the router after using the allocated unique IP address; and

the router, connected to the LAN device, for receiving the request for the unique IP address from the LAN device, allocating the unique IP address to the LAN device, and receiving the allocated unique IP address from the LAN device after the LAN device has used the allocated unique IP address.

6. A system for using an IP address on a LAN, which comprises:

a LAN device, connected to router, for sending a request for an unique IP address to the router, receiving an allocated unique IP address from the router, and returning the allocated unique IP address to the router after using the allocated unique IP address; and

the router, connected to the LAN device, containing a dynamic unique IP address pool having the unique IP addresses which are not statically allocated to a specific LAN device, for receiving the request for the unique IP address from the LAN device, allocating the unique IP address of the dynamic unique IP address pool to the LAN device, receiving the allocated unique IP address from the LAN device after the LAN device has used the allocated unique IP address.

7. The system of claim 6, wherein the router adds the allocated unique IP address returned from the LAN device to the dynamic unique IP address pool.