MOBILE DEVICE TO GENERATE MULTIPLE MAXIMUM TRANSFER UNITS AND DATA TRANSFER METHOD

• US 20130223337A1
• Filed: 11/14/2012
• Published: 08/29/2013
• Est. Priority Date: 02/29/2012
• Status: Active Grant

• Current Assignee: Pantech Corporation (Ideahub, Inc.)
• Original Assignee: Pantech Co. Ltd. (Pantech Incorporated)
• Inventors: CHOO, Ho Cheol
• Granted Patent: US 9,445,384 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04L 12/56 Packet switching systems
• CPC Class Codes: H04L 47/36 by determining packet size, e.g. maximum transfer unit [MTU]
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration

Abstract

Provided are a mobile device capable of generating multiple maximum transfer units (MTUs) and a data transfer method. The method includes determining whether a network is registered with the mobile device; if the network is not registered in the mobile device, generating a virtual interface to generate a maximum transfer unit (MTU) value of the network; and registering the network by storing the MTU value of the network in the mobile device. The mobile device includes an MTU management unit configured to determine whether a network is registered with the mobile device, and, if the network is not registered in the mobile device, to generate a virtual interface to generate an MTU value of the network.

Claims

1. A method for transferring data for a mobile device, the method comprising:

determining whether a network is registered with the mobile device;

if the network is not registered in the mobile device, generating a virtual interface to generate a maximum transfer unit (MTU) value of the network; and

registering the network by storing the MTU value of the network in the mobile device.

2. The method of claim 1, further comprising:

if the network is registered in the mobile device, determining whether a stored MTU value of the network is different from a current MTU value of the registered network.

3. The method of claim 2, wherein, if the current MTU value of the registered network is different from the stored MTU value of the network, generating a virtual interface to generate an MTU value of the registered network.

4. The method of claim 1, further comprising determining an MTU value of the network interface of the mobile device, and

if the MTU value of the connected network is smaller than the determined MTU value of the network interface, generating a virtual interface having an MTU value corresponding to the MTU value of the connected network.

5. The method of claim 1, wherein the generation of the MTU value of the network comprises:

generating the MTU value of the network according to a maximum segment size (MSS) in a transmission control protocol (TCP) connection.

6. The method of claim 1, wherein the generation of the MTU value of the network comprises:

generating the MTU value of the network according to a secure connection of virtual private network (VPN).

7. The method of claim 6, wherein the secure connection is encrypted according to at least one of secure sockets layer, transport layer security, and IPSec protocols.

8. The method of claim 1, wherein the generation of the MTU value of the network comprises:

transferring packets of different sizes to the destination to determine a maximum size of packet successfully transferred.

9. The method of claim 1, further comprising:

transferring data packets to a network interface via the virtual interface.

10. The method of claim 1, wherein the destination address and the MTU value of the network are stored in a router table.

11. The method of claim 1, further comprising:

determining whether a second network is registered with the mobile device; and

if the second network is not registered in the mobile device, generating a second virtual interface to generate an MTU value of the second network.

12. A mobile device, comprising:

a maximum transfer unit (MTU) management unit configured to determine whether a network is registered with the mobile device, and, if the network is not registered in the mobile device, to generate a virtual interface to generate an MTU value of the network.

13. The mobile device of claim 12, wherein the MTU management unit is further configured to register the network in the mobile device by storing the MTU value of the network in the mobile device.

14. The mobile device of claim 12, further comprising:

a network interface connected to a modem device to transfer the packet data according to the MTU value of the network,

wherein the virtual interface delivers packets to the network interface according to the MTU value of the network.

15. The mobile device of claim 12, wherein, if a second network is connected to the mobile device, the MTU management unit determines whether the second network is registered with the mobile device, and, if the second network is not registered in the mobile device, generates a second virtual interface to generate an MTU value of the second network.

16. The mobile device of claim 12, wherein, if the network is registered in the mobile device, the MTU management unit determines whether a stored MTU value of the network is different from a current MTU value of the registered network.

17. The mobile device of claim 16, wherein, if the current MTU value of the registered network is different from the stored MTU value of the network, the MTU management unit generates a virtual interface to generate an MTU value of the network.

18. A method for transferring data for a mobile device, the method comprising

in response to a connection of a network to the mobile device, determining whether the network is registered in a routing table;

if the network is registered in the routing table, determining whether a stored MTU value of the registered network is different from a current MTU value of the registered network; and

if the current MTU value of the registered network is different from the stored MTU value of the network, generating a virtual interface to generate an MTU value of the registered network, and registering the network by storing the generated MTU value in the routing table.

19. The method of claim 18, wherein, if the current MTU value of the registered network is the same as the stored MTU value of the registered network, maintaining an MTU creation request reserved state.

20. The method of claim 18, further comprising:

in response to a connection of the mobile device to a second network, determining whether the second network is registered in the routing table; and

if the second network is not registered in the mobile device, generating a second virtual interface to generate an MTU value of the second network.