Cellular extension of wireless local area networks

• US 8,554,945 B1
• Filed: 08/29/2003
• Issued: 10/08/2013
• Est. Priority Date: 08/29/2003
• Status: Active Grant

• Current Assignee: T-Mobile Innovations LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Cook, Fred S., Satapathy, Durga P.
• Primary Examiner(s): DOAN, DUYEN MY
• Application Number:
  US10/652,284
• Time in Patent Office: 3,693 Days
• Field of Search: 709/238, 370/401
• US Class Current: 709/238
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/16 Gateway arrangements
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

A wireless local area network (WLAN) is linked with a remote LAN to transport data packets therebetween. The WLAN includes a cellular-enabled WLAN device for communicating with a cellular network and the cellular network includes a bridge. A bridge identifier associated with the bridge is established within the cellular network. The cellular-enabled WLAN device and the remote LAN are interconnected with the bridge in response to the cellular-enabled device signaling the cellular network with the bridge identifier. The cellular-enabled WLAN device echoes WLAN network packets originating in the WLAN to the bridge. The remote LAN receives the echoed WLAN network packets from the bridge. Packets originating in the remote LAN are echoed by the bridge to the cellular-enabled WLAN device. The cellular-enabled WLAN device receives the echoed remote LAN network packets from the bridge and transmits them within the WLAN.

Claims

1. A method of interfacing a first local area network (LAN) with a remote LAN, wherein said first LAN includes a cellular-enabled LAN device for communicating with a cellular network, and wherein said cellular network includes a core data network including a bridge, said method comprising the steps of:

establishing a bridge identifier to identify said bridge within said core data network within said cellular network;

said cellular-enabled LAN device originating a call to said bridge by dialing said bridge identifier;

interconnecting said remote LAN with said bridge in response to said bridge identifier;

said cellular-enabled LAN device monitoring destination addresses in first LAN network packets originating in said first LAN and echoing to said bridge only first LAN network packets having a destination address outside said first LAN;

said remote LAN receiving said echoed first LAN network packets from said bridge;

echoing remote LAN network packets originating in said remote LAN from said bridge to said cellular-enabled LAN device; and

said cellular-enabled LAN device receiving said echoed remote LAN network packets from said bridge and transmitting them within said first LAN.

2. The method of claim 1 wherein said cellular-enabled LAN device comprises a switching hub for echoing LAN packets to said bridge.

3. The method of claim 1 wherein said first LAN comprises a wireless LAN.

4. The method of claim 1 wherein said remote LAN comprises a wireless LAN.

5. The method of claim 1 wherein said cellular network includes a packet-switched core data network, said method further comprising the step of:

establishing a virtual private network within said core data network corresponding to said bridge identifier.

6. The method of claim 5 wherein said virtual private network is established in response to activation of said bridge by an originating caller to said cellular network from said first LAN using said cellular-enabled LAN device.

7. The method of claim 6 further comprising the step of:

said core data network obtaining confirmation of a VPN set-up from said originating caller prior to establishing said virtual private network.

8. The method of claim 6 further comprising the step of:

generating a visual indication on said cellular-enabled LAN device when said virtual private network is activated.

9. The method of claim 6 further comprising the steps of:

said remote LAN associating to said bridge identifier via a respective call within said cellular network; and

configuring said virtual private network to route network packets between said first LAN and said remote LAN.

10. The method of claim 9 further comprising the step of:

configuring said virtual private network to route network packets between said first LAN and a fixed IP gateway.

11. The method of claim 6 further comprising the steps of:

said originating caller signaling said cellular network to terminate said bridge;

removing said configured routing of said virtual private network; and

notifying said remote LAN of said termination.

12. The method of claim 1 further comprising the step of:

encrypting said first LAN network packets prior to echoing to said bridge.

13. Network apparatus comprising:

a cellular system for wirelessly exchanging data with mobile transceivers; and

a core data network having a plurality of data interfaces for exchanging data packets with said cellular system, wherein said core data network includes a bridge controller for establishing routes for data packets corresponding to respective bridge identifiers when requested by at least one of said mobile transceivers;

wherein said cellular system is configured to receive a call from a plurality of cellular-enabled LAN devices to associate with a respective one of said bridge identifiers, and wherein said core data network is configured to echo data packets received from one of the cellular-enabled LAN devices to other cellular-enabled LAN devices associated with said respective bridge identifier.

14. The network apparatus of claim 13 wherein said established routes are each comprised of a virtual private network set up by said bridge controller to interconnect mobile transceivers associating to a respective bridge identifier.

15. The network apparatus of claim 14 wherein said core data network further comprises an IP gateway and wherein said virtual private network includes a link to an IP address via said IP gateway.

16. The network apparatus of claim 13 wherein said bridge controller transmits a status signal to said interconnected mobile transceivers.

17. An integrated cellular phone and wireless local area network (WLAN) portable device for interconnecting with a remote LAN via a cellular network, wherein said cellular network includes a core data network, comprising:

a WLAN node for exchanging local data packets within a wireless LAN;

voice apparatus for separately conducting a voice call within said cellular network;

a cellular modem for exchanging remote data packets with said cellular network;

a user interface including a predetermined key for initiating a bridge request;

a processor coupled to said WLAN node and said cellular modem for requesting a bridge within said core data network to a remote LAN by transmitting a bridge identifier to said cellular network in response to activation of said predetermined key and for causing at least a portion of said local data packets to be forwarded to said bridge via said cellular modem; and

a LAN bridge indicator for generating a visual display when said bridge is active.

18. The integrated cellular phone and WLAN device of claim 17 wherein said processor comprises a switching hub for selectively forwarding to said bridge only local data packets addressed to a destination outside said wireless LAN.

19. The integrated cellular phone and WLAN device of claim 17 wherein remote data packets received from said cellular system are transmitted as local data packets by said WLAN node.