Implementing a 3G Packet Core in a Cloud Computer with Openflow Data and Control Planes

• US 20130054761A1
• Filed: 08/29/2011
• Published: 02/28/2013
• Est. Priority Date: 08/29/2011
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Kempf, James, Beheshti-Zavareh, Neda, Zhang, Ying, Nilsson, Tord K., Johansson, Bengt E., Pettersson, Sten Rune, Luning, Harald
• Granted Patent: US 8,762,501 B2
• Time in Patent Office: Days
• US Class Current: 709/220
• CPC Class Codes: H04L 12/4633 Interconnection of networks using encapsulation techniques, e.g. tunneling
• CPC Class Codes: H04L 12/4666 Operational details on the addition or the stripping of a tag in a frame, e.g. at a provider edge node
• CPC Class Codes: H04L 47/781 Centralised allocation of resources
• CPC Class Codes: H04L 47/825 Involving tunnels, e.g. MPLS
• CPC Class Codes: H04W 76/12 Setup of transport tunnels

Abstract

A method for implementing a general packet radio service (GPRS) tunnel protocol (GTP) in a packet core (PC) of a third generation (3G) network having a split architecture where a control plane of the PC of the 3G network is in a cloud computing system, the cloud computing system including a controller, the controller to execute a plurality of control plane modules, the control plane to communicate with the data plane of the PC through a control plane protocol, the data plane implemented in a plurality of network elements of the 3G network by configuring switches implementing a data plane of the SGSN and GGSN and intermediate switches to establish a first and second GTP tunnel endpoint.

Claims

1. A method for implementing a general packet radio service (GPRS) tunnel protocol (GTP) in a packet core (PC) of a third generation (3G) network having a split architecture where a control plane of the PC of the 3G network is in a cloud computing system, the cloud computing system including a controller, the controller to execute a plurality of control plane modules, the control plane to communicate with the data plane of the PC through a control plane protocol, the data plane implemented in a plurality of network elements of the 3G network, the method comprising the steps of:

receiving a request by the controller to create a GTP tunnel in the PC of the 3G network between a serving GPRS support node (SGSN) and a gateway GPRS support node (GGSN) for a subscriber session;

configuring a switch implementing a data plane of the SGSN, via the control protocol, to encapsulate and decapsulate packets of the subscriber session and to establish a first GTP tunnel endpoint;

configuring at least one switch in a route of the GTP tunnel, via the control plane protocol, to forward packets of the subscriber session according to the GTP tunnel; and

configuring a switch implementing a data plane of the GGSN, via the control plane protocol, to encapsulate and decapsulate the packets of the subscriber session and to establish a second GTP tunnel endpoint.

2. The method of claim 1 wherein receiving the request by the controller to create a GTP tunnel further comprises the step of receiving a protocol data packet (PDP) context creation request from a control plane component of the SGSN.

3. The method of claim 1, wherein receiving the request by the controller to create a GTP tunnel further comprises the step of receiving a GTP routing update request from a control plane component of the GGSN.

4. The method of claim 1, further comprising the steps of:

receiving a request by the controller to modify the GTP tunnel in the PC of the 3G network between the SGSN and GGSN for the subscriber session;

modifying a configuration of the switch implementing the data plane of the SGSN, via the control plane protocol, to encapsulate and decapsulate packets of the subscriber session and to modify the first GTP tunnel endpoint; and

modifying a configuration of the switch implementing the data plane of the GGSN, via the control plane protocol, to encapsulate and decapsulate the packets of the subscriber session and to modify the second GTP tunnel endpoint.

5. The method of claim 4, further comprising the step of removing configuration at the least one switch in the route of the GTP tunnel, via the control plane protocol, to end forwarding of packets of the subscriber session according to the GTP tunnel.

6. The method of claim 5, further comprising the step of configuring a switch in a new route of the GTP tunnel, via the control plane protocol, to forward packets of the subscriber session according to the GTP tunnel.

7. The method of claim 1, further comprising the steps of:

receiving a request by the controller to delete the GTP tunnel in the PC of the 3G network between the SGSN and GGSN for the subscriber session;

removing a configuration of the switch implementing the data plane of the SGSN, via the control plane protocol, to end encapsulation and decapsulation of packets of the subscriber session and to remove the first GTP tunnel endpoint; and

removing a configuration of the switch implementing the data plane of the GGSN, via the control plane protocol, to end encapsulation and decapsulation of the packets of the subscriber session and to remove the second GTP tunnel endpoint.

8. A cloud computing system for managing implementation of a general packet radio service (GPRS) tunnel protocol (GTP) in a packet core (PC) of a third generation (3G) network having a split architecture where a control plane of the PC of the 3G network is in the cloud computing system, the control plane to communicate with a data plane of the PC through a control plane protocol, the data plane implemented in a plurality of network elements of the 3G network, the cloud computing system comprising:

a plurality of servers in communication with one another and in communication with the plurality of network elements implementing the data plane of the PC, the plurality of servers executing,

a controller configured to execute a plurality of control plane modules implementing the control plane of the PC, each control plane module to provide a set of control plane functions for managing the data plane, the controller configured to receive a request to create a GTP tunnel in the PC of the 3G network between a serving GPRS support node (SGSN) and a gateway GPRS support node (GGSN) for a subscriber session, the controller configured to configure a switch implementing a data plane of the SGSN, via the control plane protocol, to encapsulate and decapsulate packets of the subscriber session and to establish a first GTP tunnel endpoint, the controller configured to configure at least one switch in a route of the GTP tunnel, via the control plane protocol, to forward packets of the subscriber session according to the GTP tunnel, and the controller configured to configure a switch implementing a data plane of the GGSN, via the control plane protocol, to encapsulate and decapsulate the packets of the subscriber session and to establish a second GTP tunnel endpoint; and

a cloud manager communicatively coupled to the controller, the cloud manager configured to manage execution of the plurality of control plane modules of the PC.

9. The cloud computing system of claim 8, wherein the controller receives the request to create a GTP tunnel as a protocol data packet (PDP) context creation request from a control plane component of the SGSN.

10. The cloud computing system of claim 8, wherein the controller receives the request to create a GTP tunnel as a GTP routing update request from a control plane component of the GGSN.

11. The cloud computing system of claim 8, wherein the controller is configured to receive a request to modify the GTP tunnel in the PC of the 3G network between the SGSN and GGSN for the subscriber session, the controller is configured to modify configuration of the switch implementing the data plane of the SGSN, via the control plane protocol, to encapsulate and decapsulate packets of the subscriber session and to modify the first GTP tunnel endpoint, and the controller is configured to modify configuration of the switch implementing the data plane of the GGSN, via the control plane protocol, to encapsulate and decapsulate the packets of the subscriber session and to modify the second GTP tunnel endpoint.

12. The cloud computing system of claim 11, wherein the controller is configured to remove configuration of the at least one switch in the route of the GTP tunnel, via the control plane protocol, to end forwarding of packets of the subscriber session according to the GTP tunnel.

13. The cloud computing system of claim 12, wherein the controller is configured to configure a switch in a new route of the GTP tunnel, via the control plane protocol, to forward packets of the subscriber session according to the GTP tunnel.

14. The cloud computing system of claim 8, wherein the controller is adapted to receive a request by the controller to delete the GTP tunnel in the PC of the 3G network between the SGSN and GGSN for the subscriber session, the controller is configured to remove configuration of the switch implementing the data plane of the SGSN, via the control plane protocol, to end encapsulation and decapsulation of packets of the subscriber session and to remove the first GTP tunnel endpoint, and the controller is configured to remove configuration of the switch implementing the data plane of the GGSN, via the control plane protocol, to end encapsulation and decapsulation of the packets of the subscriber session and to remove the second GTP tunnel endpoint.