Interworking gateway for mobile nodes

• US 8,064,909 B2
• Filed: 10/27/2008
• Issued: 11/22/2011
• Est. Priority Date: 10/25/2007
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Spinelli, Vincent, Rangan, Mohan, Dahod, Ashraf M., Depietro, John, Kathuria, Vijay, Ramankutty, Rajesh, Radhakrishnan, Shaji E., Puthiyandyil, Sanil Kumar, Ghai, Rajat
• Primary Examiner(s): Patel; Ajit
• Application Number:
  US12/259,266
• Publication Number:
  US 20090156213A1
• Time in Patent Office: 1,121 Days
• Field of Search: None
• US Class Current: 455/436
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04M 15/66 Policy and charging system
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 36/36 by user or terminal equipment
• CPC Class Codes: H04W 36/362 Conditional handover
• CPC Class Codes: H04W 64/003 locating network equipment
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 84/105 PBS [Private Base Station] network H04W84/12 - H04W84/16 take precedence
• CPC Class Codes: H04W 88/16 Gateway arrangements
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

Systems and methods are provided that allow inter-working between communication networks for the delivery of service to mobile nodes. A gateway is provided that communicates with a femto cell to extend service to an area that otherwise does not receive coverage from a service provider. The femto cell is a small scale base station used to provide coverage over a small area (such as a home or business), and connect to a home or enterprise network. The femto cell provides service for a mobile node and a gateway permits communication over a broadband network. The gateway integrates the mobile nodes connecting via a femto cell into the service provider'"'"'s network. The gateway also allows provisioning of services and applications, control of service levels, and provides seamless handoffs to macro base stations and other types of access technologies such as Wi-Fi.

Claims

1. A gateway in a communications network comprising:

a femto gateway functionality residing in the gateway and for communicating with a plurality of femto cells that acts as a proxy for each femto cell with which the gateway communicates by aggregating communications from the plurality of femto cells and communicating as a proxy with a core network on behalf of the plurality of femto cells; and

a security gateway functionality residing in the gateway that provides a secure connection and tunnels different protocols over a broadband network between each femto cell and the gateway;

the proxy of the femto gateway functionality for communicating with other radio access network equipment to provide for a handoff of a mobile node and for hiding individual femto cells from the network.

2. The gateway of claim 1, further comprising an interworking function residing in the gateway that receives communications in a first protocol and changes the communications to a second protocol to provide interoperability between networks in conjunction with the proxy of the femto gateway functionality.

3. The gateway of claim 1, further comprising a serving gateway functionality to provide connectivity to an evolved UMTS terrestrial radio access network (E-UTRAN) from a mobile node communicating through a femto cell.

4. The gateway of claim 1, further comprising a management functionality residing in the gateway that provides plug-and-play capabilities for each femto cell.

5. The gateway of claim 1, wherein the secure connection uses IP security (IPSec) to establish a secure tunnel.

16. The gateway of claim 1, wherein two femto nodes may communicate via the gateway without transiting the core network.

19. The gateway of claim 1, further comprising an interworking function.

6. A method of providing access to a communications network comprising:

receiving a communication from a first femto cell to establish connectivity to a gateway;

establishing a secure connection from the gateway to the first femto cell using a security gateway functionality in the gateway, wherein the secure connection provides a secure connection and tunnels different protocols over a broadband network between each femto cell and the gateway;

aggregating communications from the first and a second femto cell at the gateway and communicating as a proxy with a core network on behalf of the first and second femto cell, so that the first and second femto cell are not directly exposed to the core network; and

communicating with other radio access network equipment to provide for a handoff of a mobile node.

7. The method of claim 6, further comprising receiving communications in a first protocol at the gateway and changing the communications to a second protocol to provide interoperability between networks.

8. The method of claim 6, further comprising providing connectivity to an evolved UMTS terrestrial radio access network (E-UTRAN) from a mobile node communicating through a femto cell.

9. The method of claim 6, further comprising providing plug-and-play capabilities for the femto cell.

10. The method of claim 6, wherein the secure connection is established with IP security (IP Sec).

17. The method of claim 6, wherein two femto nodes may communicate via the gateway without transiting the core network.

20. The method of claim 6, further comprising interworking data from a first signaling protocol to a second signaling protocol.

11. Logic encoded in one or more non-transient media that includes code for execution and when executed by a processor is operable to perform operations comprising:

receiving a communication from a first femto cell to establish connectivity to a gateway;

establishing a secure connection from the gateway to the first femto cell using a security gateway functionality in the gateway, wherein the secure connection provides a secure connection and tunnels different protocols over a broadband network between each femto cell and the gateway;

aggregating communications from the first and a second femto cell at the gateway and communicating as a proxy with a core network on behalf of the first and second femto cell, so that the first and second femto cell are not directly exposed to the core network; and

communicating with other radio access network equipment to provide for a handoff of a mobile node.

12. The logic of claim 11, the operations further comprising receiving communications in a first protocol at the gateway and changing the communications to a second protocol to provide interoperability between networks.

13. The logic of claim 11, the operations further comprising providing connectivity to an evolved UMTS terrestrial radio access network (E-UTRAN) from a mobile node communicating through a femto cell.

14. The logic of claim 11, the operations further comprising providing plug-and-play capabilities for the femto cell.

15. The logic of claim 11, wherein the secure connection is established with IP security (IPSec).

18. The logic of claim 11, wherein two femto nodes may communicate via the gateway without transiting the core network.