ENHANCED DHCP METHOD

• US 20140344475A1
• Filed: 05/14/2014
• Published: 11/20/2014
• Est. Priority Date: 05/15/2013
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: LIN, Kuan-Ming, SUN, Ming-Cong, YU, Huang-Yi, CHANG, Tsung-Chieh, CHEN, Yi-Lun, LIN, Yuan-Chieh
• Granted Patent: US 9,537,818 B2
• Time in Patent Office: Days
• US Class Current: 709/245
• CPC Class Codes: H04L 47/741 Holding a request until resources become available
• CPC Class Codes: H04L 61/5014 using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
• CPC Class Codes: H04L 61/5053 Lease time; Renewal aspects

Abstract

DHCP methods adopted by a slave device connected to a host device are disclosed. The method includes: receiving a DHCP discover message from the host device; in response to the DHCP discover message, transmitting a DHCP offer message containing a DHCP renewal time configuration to the host device; receiving a DHCP request message from the host device; and in response to the DHCP request message, transmitting a DHCP acknowledgement message containing a client Internet Protocol (IP) address and the DHCP renewal time configuration to the host device.

Claims

1. A method, adopted by a slave device connected to a host device, comprising:

receiving a DHCP discover message from the host device;

in response to the DHCP discover message, transmitting a DHCP offer message containing a DHCP renewal time configuration to the host device;

receiving a DHCP request message from the host device; and

in response to the DHCP request message, transmitting a DHCP acknowledgement message containing a client Internet Protocol (IP) address and the DHCP renewal time configuration to the host device.

2. The method of claim 1, wherein the DHCP renewal time configuration is less than 1 minute.

3. The method of claim 1, further comprising:

queuing the DHCP discover message until the slave device establishes a link with a network; and

wherein the transmitting the DHCP offer message comprises;

transmitting the DHCP offer message to the host device upon the establishment of the link.

4. The method of claim 1, further comprising:

queuing the DHCP request message until the slave device establishes the link with a network; and

wherein the transmitting the DHCP acknowledgement message comprises;

transmitting the DHCP acknowledgement message to the host device upon the establishment of the link.

5. The method of claim 1, wherein the step of transmitting the DHCP acknowledgement message comprises:

when a link to a network is disconnected, in response to the DHCP request message, transmitting a DHCP acknowledgement message containing a mock IP address and the DHCP renewal time configuration to the host device.

6. The method of claim 1, further comprising:

when the link to the network is disconnected, in response to the DHCP request message, transmitting a DHCP negative acknowledgement message to the host device.

7. The method of claim 1, further comprising:

receiving the DHCP request message from the host device to renew the client IP address in a renewal period according to the DHCP renewal time configuration.

8. A method, adopted by a slave device connected to a host device, comprising:

receiving a DHCP discover message from the host device;

in response to the DHCP discover message, transmitting a DHCP offer message containing a DHCP lease time configuration to the host device;

receiving a DHCP request message from the host device; and

in response to the DHCP request message, transmitting a DHCP acknowledgement message containing a client Internet Protocol (IP) address and the DHCP lease time configuration to the host device;

wherein the DHCP lease time configuration is less than 2 minute.

9. The method of claim 8, further comprising:

queuing the DHCP discover message until the slave device establishes a link with a network; and

wherein the transmitting the DHCP offer message comprises;

transmitting the DHCP offer message to the host device upon the establishment of the link.

10. The method of claim 8, further comprising:

queuing the DHCP request message until the slave device establishes the link with a network; and

wherein the transmitting the DHCP acknowledgement message comprises;

transmitting the DHCP acknowledgement message to the host device upon the establishment of the link.

11. The method of claim 8, wherein the step of transmitting the DHCP acknowledgement message comprises:

when a link to a network is disconnected, in response to the DHCP request message, transmitting a DHCP acknowledgement message containing a mock IP address and the DHCP renewal time configuration to the host device.

12. The method of claim 8, further comprising:

when the link to the network is disconnected, in response to the DHCP request message, transmitting a DHCP negative acknowledgement message to the host device.

13. The method of claim 8, further comprising:

receiving the DHCP request message from the host device to renew the client IP address in a renewal period less than the DHCP lease time configuration.