Methods and apparatus for maintaining network addresses

• US 8,327,008 B2
• Filed: 06/20/2006
• Issued: 12/04/2012
• Est. Priority Date: 06/20/2006
• Status: Active Grant

• Current Assignee: Lenovo PC International Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Inventors: Cromer, Daryl, Jakes, Philip J., Locker, Howard J., Octaviano, Raymond G. II
• Primary Examiner(s): Neurauter, George C
• Assistant Examiner(s): Mesa, Joel
• Application Number:
  US11/472,492
• Publication Number:
  US 20070294421A1
• Time in Patent Office: 2,359 Days
• Field of Search: 709/231, 709/232
• US Class Current: 709/231
• CPC Class Codes: H04L 61/2521 Translation architectures other than single NAT servers
• CPC Class Codes: H04L 61/5084 Providing for device mobility network addressing or numbering for mobility support in wireless networks H04W8/26; mobile IP H04W80/04
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level

Abstract

This present invention relates to a method for using hypervisors to enable stable wireless network connections. The crux of the invention involves pushing the control of the networking devices from the Operating System level down to a networking front end hypervisor level. The hypervisor will control all networking devices, the authentication for these devices, and the selection of which connection to use. The hypervisor will also perform Network Address Translation (NAT) to the Operating System. Thus, the Operating System will receive a single, private IP address for use with the Operating System'"'"'s applications. The hypervisor will handle the change of the IP address when roaming between networks and hide it from the Operating System through the use of the NAT.

Claims

1. An apparatus comprising:

one or more networking devices; and

a hypervisor configured to enable a stable wireless network connection for an operating system and applications thereof, said hypervisor further;

controlling the one or more networking devices, said control including selecting a network connection based on one or more policies; and

enabling a stable wireless network connection for an operating system and applications thereof via;

performing network address translation to an operating system during roaming between networks to maintain a stable IP address to said operating system; and

buffering outgoing data during a network connection change such that an appearance of stable network connectivity, including allowing data flow until a second network connection is up and running, is maintained during a change in network connectivity;

wherein said hypervisor ends a first network connection responsive to establishing data flow to the second network connection.

2. The system of claim 1, wherein the hypervisor is inserted between upper, Operating System layers and lower, hardware layers of an OSI model.

3. The system of claim 1, wherein selecting a network connection further comprises automatically searching for and connecting to a wireless network when the apparatus is not currently connected.

4. The system of claim 1, wherein the hypervisor is configured to control all wireless devices of the apparatus.

5. The system of claim 4, wherein the hypervisor is configured to maintain drivers necessary to talk to all wireless devices of the apparatus.

6. The system of claim 1, wherein the hypervisor is configured to run from power up of the apparatus to power down of the apparatus.

7. A method comprising:

an act of controlling one or more networking devices of an apparatus with a hypervisor implemented in said apparatus; and

an act of enabling a stable wireless network connection for an operating system and applications thereof with the hypervisor;

said controlling further comprising selecting a network connection based on one or more policies;

said enabling further comprising;

performing network address translation to an operating system during roaming between networks to maintain a stable IP address to said operating system; and

buffering outgoing data during a network connection change such that an appearance of stable network connectivity, including allowing data flow until a second network connection is up and running, is maintained during a change in network connectivity;

wherein said hypervisor ends a first network connection responsive to establishing data flow to the second network connection.

8. The method of claim 7, wherein the hypervisor is inserted between upper, Operating System layers and lower, hardware layers of an OSI model.

9. The method of claim 7, wherein selecting a network connection further comprises the hypervisor automatically searching for and connecting to a wireless network when the apparatus is not currently connected.

10. The method of claim 7, wherein the hypervisor is aware of all wireless devices of the apparatus.

11. The method of claim 10, wherein the hypervisor maintains drivers necessary to talk to the wireless devices.

12. The method of claim 7, wherein the hypervisor runs from power up of the client computer to power down of the client computer.

13. A non-signal program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform acts, said acts comprising:

an act of controlling one or more networking devices of an apparatus with a hypervisor implemented in said apparatus; and

an act of enabling a stable wireless network connection for an operating system and applications thereof with the hypervisor;

said controlling further comprising selecting a network connection based on one or more policies;

said enabling further comprising;

performing network address translation to an operating system during roaming between networks to maintain a stable IP address to said operating system; and

buffering outgoing data during a network connection change such that an appearance of stable network connectivity, including allowing data flow until a second network connection is up and running, is maintained during a change in network connectivity;

wherein said hypervisor ends a first network connection responsive to establishing data flow to the second network connection.