System and method for bypassing an access point in a local area network for P2P data transfers

• US 7,656,849 B1
• Filed: 05/31/2006
• Issued: 02/02/2010
• Est. Priority Date: 05/31/2006
• Status: Expired due to Fees

• Current Assignee: Qurio Holdings Incorporated
• Original Assignee: Qurio Holdings Incorporated
• Inventors: Evans, Gregory Morgan
• Primary Examiner(s): Ton; Dang T
• Assistant Examiner(s): Morlan; Robert M
• Application Number:
  US11/443,761
• Time in Patent Office: 1,343 Days
• Field of Search: 370/338, 370/401, 370/465, 370/409
• US Class Current: 370/338
• CPC Class Codes: H04L 43/0805 by checking availability
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A system and method for bypassing an access point in a wireless Local Area Network (LAN) for direct point-to-point data transfers are provided. A user device in the wireless LAN is equipped with a primary local wireless interface establishing a wireless communication link with an access point of the wireless LAN, a secondary local wireless interface used for direct point-to-point (P2P) file transfers, and a P2P file transfer application. When the P2P application desires to transfer a data file to another user device within the wireless LAN, the user device determines whether the other user device is within a coverage area of the secondary local wireless interface and whether the file transfer meets one or more alternate transfer criterion. If so, the data file is transferred to the other user device via a direct P2P wireless communication link, thereby bypassing the access point of the wireless LAN.

Claims

1. A method for transferring a file from a first user device within a wireless local area network to a second user device within the wireless local area network comprising:

providing a primary local wireless interface for the first user device, the primary local wireless interface having a physical layer, a data link layer, a network layer, and a transport layer;

providing a secondary local wireless interface for the first user device, the secondary local wireless interface having a physical layer, a data link layer, a network layer, and a transport layer;

providing a control system associated with the primary and secondary local wireless interfaces, the control system comprising;

a first network agent operatively associated with the primary local wireless interface, the first network agent monitoring at least one of the physical layer, the data link layer, the network layer, and the transport layer of the primary local wireless interface;

a second network agent operatively associated with the secondary local wireless interface, the second network agent monitoring at least one of the physical layer, the data link layer, the network layer, and the transport layer of the secondary local wireless interface; and

a cross-layer agent obtaining information regarding the primary and secondary local wireless interfaces from the first and second network agents, and determining whether to transfer the file to the second user device via a direct point-to-point wireless communication link or via an access point based on at least a portion of the information regarding the primary and secondary local wireless interfaces;

initiating a file transfer of the file from the first user device to the second user device;

determining whether to transfer the file to the second user device via the direct point-to-point wireless communication link or via the access point associated with the wireless local area network where the primary local wireless interface communicates with the access point and the secondary local wireless interface communicates with the second user device using the direct point-to-point wireless communication link; and

if the file is to be transferred via the direct point-to-point wireless communication link;

establishing the direct point-to-point wireless communication link with the second user device; and

transferring the file to the second user device via the direct point-to-point wireless communication link, thereby bypassing the access point.

2. The method of claim 1 wherein establishing the direct point-to-point wireless communication link comprises establishing the direct point-to-point wireless communication link with the second user device using the secondary local wireless interface.

3. The method of claim 1 further comprising transferring the file to the access point via a first local wireless communication link between the first user device and the access point if the file is to be transferred to the second user device via the access point, wherein the access point routes the file to the second user device via a second local wireless communication link between the access point and the second user device.

4. The method of claim 3 the method further comprising establishing the first local wireless communication link between the first user device and the access point using the primary local wireless interface.

5. The method of claim 1 wherein determining whether to transfer the file to the second user device via the direct point-to-point wireless communication link or via the access point comprises determining whether the second user device is within a local wireless coverage area of the secondary local wireless interface.

6. The method of claim 5 wherein determining whether to transfer the file to the second user device via the direct point-to-point wireless communication link or via the access point further comprises determining whether a file size of the file is greater than a predetermined threshold.

7. The method of claim 5 wherein determining whether to transfer the file to the second user device via the direct point-to-point wireless communication link or via the access point further comprises determining whether a file type of the file is one of a predetermined list of file types.

8. The method of claim 5 wherein determining whether to transfer the file to the second user device via the direct point-to-point wireless communication link or via the access point further comprises determining whether to transfer the file to the second user device via the direct point-to-point wireless communication link based on a priority of the file.

9. The method of claim 5 wherein determining whether to transfer the file to the second user device via the direct point-to-point wireless communication link or via the access point further comprises determining whether to transfer the file to the second user device via the direct point-to-point wireless communication link based on a history of performance for the primary and secondary local wireless interfaces.

10. The method of claim 1 wherein determining whether to transfer the file to the second user device via the direct point-to-point wireless communication link or via the access point further comprises determining whether bandwidth is available for the direct point-to-point wireless communication link.

19. The user system of claim 1 wherein the first and second local wireless interfaces operate in essentially non-overlapping frequency bands.

11. A user system comprising:

a) a first local wireless interface adapted to establish a first wireless communication link with an access point of a wireless local area network, the first local wireless interface including a physical layer, a data link layer, a network layer, and a transport layer;

b) a second local wireless interface, the second local wireless interface including a physical layer, a data link layer, a network layer, and a transport layer; and

c) a control system associated with the first and second local wireless interfaces the control system comprising;

a first network agent operatively associated with the first local wireless interface, the first network agent monitoring at least one of the physical layer, the data link layer, the network layer, and the transport layer of the first local wireless interface;

a second network agent operatively associated with the second local wireless interface, the second network agent monitoring at least one of the physical layer, the data link layer, the network layer, and the transport layer of the second local wireless interface; and

a cross-layer agent obtaining information regarding the first and second local wireless interfaces from the first and second network agents, and determining whether to transfer the file to a second user system via a direct point-to-point wireless communication link or via the access point based on at least a portion of the information regarding the first and second local wireless interfaces, wherein the control system;

i) initiates a file transfer of a file to the second user system;

ii) determines whether to transfer the file to the second user system via the direct point-to-point wireless communication link or via the access point associated with the wireless local area network; and

iii) if the file is to be transferred via the direct point-to-point wireless communication link;

A) establishes the direct point-to-point wireless communication link with the second user system using the second local wireless interface; and

B) transfers the file to the second user system via the direct point-to-point wireless communication link, thereby bypassing the access point.

12. The user system of claim 11 wherein if the file is to be transferred to the second user system via the access point, the control system further transfers the file to the access point via the first wireless communication link between the user system and the access point, wherein the access point routes the file to the second user system via a second wireless communication link between the access point and the second user system.

13. The user system of claim 11 wherein in order to determine whether to transfer the file to the second user system via the direct point-to-point wireless communication link or via the access point, the control system further determines whether the second user system is within a local wireless coverage area of the second local wireless interface.

14. The user system of claim 13 wherein the control system further determines whether to transfer the file to the second user system via the direct point-to-point wireless communication link or via the access point based at least in part on a file size of the file.

15. The user system of claim 13 wherein the control system further determines whether to transfer the file to the second user system via the direct point-to-point wireless communication link or via the access point based at least in part on a file type of the file.

16. The user system of claim 13 wherein the control system determines whether to transfer the file to the second user system via the direct point-to-point wireless communication link or via the access point based at least in part on a priority of the file.

17. The user system of claim 13 wherein the control system further determines whether to transfer the file to the second user system via the direct point-to-point wireless communication link or via the access point based on at least a history of performance for the first and second local wireless interfaces.

18. The user system of claim 11 wherein in order to determine whether to transfer the file to the second user system via the direct point-to-point wireless communication link or via the access point, the control system further determines whether bandwidth is available for the direct point-to-point wireless communication link.

20. The user system of claim 11 wherein the control system further comprises:

an application that initiates the file transfer; and

a protocol stack switch controlled by the cross-layer agent to couple the application to the first local wireless interface when the cross-layer agent determines that the file is to be transferred via the access point and to couple the application to the second local wireless interface when the cross-layer agent determines that the file is to be transferred via the direct point-to-point wireless communication link.

21. The user system of claim 11 wherein the user system and the second user system are personal video recorders.