Enhanced DHCP method

• US 9,537,818 B2
• Filed: 05/14/2014
• Issued: 01/03/2017
• Est. Priority Date: 05/15/2013
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Chen, Yi-Lun, Lin, Yuan-Chieh, Lin, Kuan-Ming, Sun, Ming-Cong, Yu, Huang-Yi, Chang, Tsung-Chieh
• Primary Examiner(s): Taylor, Nicholas
• Assistant Examiner(s): Williams, Clayton R
• Application Number:
  US14/277,178
• Publication Number:
  US 20140344475A1
• Time in Patent Office: 965 Days
• US Class Current: 1/1
• 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, by the slave device, a DHCP discover message from the host device;

queuing, by the slave device, the DHCP discover message until the slave device establishes a first network link with a network;

transmitting, by the slave device, a DHCP offer message to the host device in response to the DHCP discover message upon the establishment of the first network link, wherein the DHCP offer message comprises a DHCP renewal time configuration;

receiving, by the slave device, a first DHCP request message from the host device; and

transmitting, by the slave device, a DHCP acknowledgement message in response to the first DHCP request message, wherein the DHCP acknowledgement message comprises a client Internet Protocol (IP) address and the DHCP renewal time configuration to the host device,

wherein the method further comprising;

establishing, by the slave device, a second network link with the network when the first network link is disconnected;

queuing, by the slave device, a second DHCP request message until the slave device establishes the second network link with the network when the first network link is disconnected, and

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

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

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

when the first network link is disconnected, transmitting, by the slave device, a DHCP acknowledgement message in response to the first DHCP request message,

wherein the DHCP acknowledgement message comprises a mock IP address and the DHCP renewal time configuration to the host device.

4. The method of claim 1, further comprising:

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

5. The method of claim 1, further comprising:

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

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

receiving, by the slave device, a DHCP discover message from the host device;

queuing, by the slave device, the DHCP discover message until the slave device establishes a first network link with a network;

transmitting, by the slave device, a DHCP offer message to the host device in response to the DHCP discover message upon the establishment of the first network link, wherein the DHCP offer message comprises a DHCP lease time configuration;

receiving, by the slave device, a first DHCP request message from the host device; and

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

wherein the method further comprising;

establishing, by the slave device, a second network link with the network when the first network link is disconnected; and

queuing, by the slave device, a second DHCP request message until the slave device establishes the second network link with the network when the first network link is disconnected, and

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

7. The method of claim 6, wherein the step of transmitting the DHCP acknowledgement message comprises:

when the first network a link is disconnected, transmitting, by the slave device, a DHCP acknowledgement message in response to the first DHCP request message,

wherein the DHCP acknowledgement message comprises a mock IP address and the DHCP renewal time configuration to the host device.

8. The method of claim 6, further comprising:

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

9. The method of claim 6, further comprising:

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