Method and apparatus for relaying packet transmission and updating network address information in communication system

• US 10,735,321 B2
• Filed: 06/01/2018
• Issued: 08/04/2020
• Est. Priority Date: 01/06/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Shin, Bong-Jhin, Kang, Jae-Eun, Kang, Han-Su, Park, Sung-Il, Park, Seong-Hee, Yang, Chil-Youl, Lee, Myoung-Hwan, Lee, Jang-Hee, Lee, Chun-Ho, Lee, Tae-Young
• Primary Examiner(s): Phan, Man U
• Application Number:
  US15/995,925
• Publication Number:
  US 20180278524A1
• Time in Patent Office: 795 Days
• Field of Search: 370392
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 2101/622 Layer-2 addresses, e.g. medium access control [MAC] addresses
• CPC Class Codes: H04L 45/74 Address processing for routing
• CPC Class Codes: H04L 61/103 across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
• CPC Class Codes: H04L 61/25 of the same type
• CPC Class Codes: H04L 61/58 Caching of addresses or names
• CPC Class Codes: H04L 61/59 using proxies for addressing

Abstract

A method to transmit and receive a packet in a bridge of a communication system is provided. The method includes receiving a first packet from a first network. The method also includes converting a medium access control (MAC) layer source address of the received first packet into a MAC address of the bridge. The method further includes transmitting the address-converted first packet to a node of a second network.

Claims

1. A method for communicating of a bridge device including a bridge in a communication network, the method comprising:

identifying that the bridge is replaced;

in response to identifying that the bridge is replaced;

obtaining an internet protocol (IP) address of a first network node located internally to the communication network,

transmitting, to the first network node, a packet indicating that the bridge is replaced by using the IP address, and

broadcasting, to a second network node located externally to the communication network, a message to update information of the replaced bridge, wherein the message includes the IP address and a corresponding medium access control (MAC) address of the replaced bridge; and

in response to the replaced bridge being a wireless bridge, updating a mapping table between the IP address of the first network node and the corresponding MAC address of the replaced bridge.

2. The method of claim 1, wherein the packet includes a multicast packet.

3. The method of claim 1, wherein the message is broadcasted within a predetermined number of times.

4. The method of claim 1, further comprising:

in response to the replaced bridge being a wired bridge, deleting a mapping table managed before the bridge was replaced.

5. A method to update network address information in a communication system using a bridge device, the method comprising:

identifying that the bridge device is replaced;

in response to identifying that the bridge device is replaced;

obtaining an internet protocol (IP) address by the replaced bridge device,

transmitting, by the replaced bridge device, a packet indicating the replacement of the bridge device to an internal network node, and

broadcasting, by the replaced bridge device, a message to update the network address information to an external network node;

in response to the replaced bridge device being a wireless bridge device, updating a mapping table; and

in response to the replaced bridge device being a wired bridge device, deleting the mapping table.

6. The method of claim 5, wherein table information including the network address information includes an address resolution protocol (ARP) table of the external network node.

7. The method of claim 5, wherein the packet indicating the replacement of the bridge device includes a multicast packet.

8. The method of claim 5, further comprising:

deleting or updating a mapping table between the IP address and a medium access control (MAC) address by the replaced bridge device.

9. A bridge device in a communication system that uses a wired or wireless bridge, the bridge device comprising:

a first network interface configured to communicate with an external network;

a second network interface configured to communicate with an internal network; and

at least one processor configured to;

identify that the bridge device is replaced; and

in response to identifying that the bridge device is replaced;

control a bridge function to obtain an internet protocol (IP) address responsive to a bridge being changed,

transmit a packet indicating the change in the bridge to a node of the internal network through the second network interface, and

broadcast a message to update a network address information to an external network node through the first network interface,

wherein;

responsive to the changed bridge being a wireless bridge, a mapping table is updated, and

responsive to the changed bridge being a wired bridge, the mapping table is deleted.

10. The bridge device of claim 9, wherein table information including the network address information includes an address resolution protocol (ARP) table of the external network node.

11. The bridge device of claim 9, wherein the packet indicating the change in bridge includes a multicast packet.

12. The bridge device of claim 9, wherein the at least one processor is configured to control an operation of deleting or updating a mapping table between the IP address and a MAC address.