Granted Patent B2

US 9,185,058 · App. 13/835,821 · Granted Nov 10, 2015

Abstract

Claims (40)

1. A method of processing general packet radio service (GPRS) tunneling protocol user plane traffic, the method comprising:

receiving packets from a source node at a termination endpoint of a destination node via a GPRS tunneling protocol user plane (GTP-U) tunnel;

filtering ingress GTP-U packets from other types of packets received at the destination node using an open-source operating system filtering module within an operating system kernel;

forwarding a respective ingress GTP-U packet with a public destination IP address to a first queue if a destination IP address matches a defined GTP-U public IP address for the destination node;

extracting one or more ingress GTP-U packets from the first queue and forwarding the one or more ingress GTP-U packets to a user-land operating system process for inspection;

performing network address translation (NAT) of the destination IP address on the one or more ingress GTP-U packets, wherein the performing NAT includes load balancing across a plurality of radio bearers;

placing at least one of the one or more ingress GTP-U packets that have an internal IP address that identifies with a particular radio bearer into a second queue;

forwarding the at least one of the one or more ingress GTP-U packets via the particular radio bearer within a network for processing using an IP forwarding capability of the operating system kernel;

performing network address translation of a source IP address of egress GTP-U packets from a radio bearer via the open-source operating system filtering module before forwarding the egress GTP-U packets to an external network.

2. The method of claim 1 , wherein the source node comprises a serving GPRS support node.

3. The method of claim 1 , wherein the destination node comprises a radio network controller.

4. The method of claim 1 , wherein the operating system comprises an open-source operating system.

5. The method of claim 4 , wherein the open-source operating system comprises Linux.

6. A system for processing GPRS tunneling protocol user plane traffic, the system comprising:

one or more servers configured to:

receive packets from a source node at a termination endpoint of a destination node via a GPRS tunneling protocol user plane (GTP-U) tunnel;

filter ingress GTP-U packets from other types of packets received at the destination node using an open-source operating system filtering module within an operating system kernel;

forward a respective ingress GTP-U packet with a public destination IP address to a first queue if a destination IP address matches a defined GTP-U public IP address for the destination node;

extract one or more ingress GTP-U packets from the first queue and forwarding the one or more ingress GTP-U packets to a user-land operating system process for inspection;

perform network address translation (NAT) of the destination IP address on the one or more ingress GTP-U packets, wherein the performing NAT includes load balancing across a plurality of radio bearers;

place at least one of the one or more ingress GTP-U packets that have an internal IP address that identifies with a particular radio bearer into a second queue;

forward the at least one of the one or more ingress GTP-U packets via the particular radio bearer within a network for processing using an IP forwarding capability of the operating system kernel;

perform network address translation of a source IP address of egress GTP-U packets from a radio bearer via the open-source operating system filtering module before forwarding the egress GTP-U packets to an external network.

7. The system of claim 6 , wherein the source node comprises a serving GPRS support node.

8. The system of claim 6 , wherein the destination node comprises a radio network controller.

9. The system of claim 6 , wherein the operating system comprises an open-source operating system.

10. The system of claim 9 , wherein the open-source operating system comprises Linux.

11. A non-transitory computer-usable data carrier storing instructions that, when executed by a computer, cause the computer to perform a method comprising:

receiving packets from a source node at a termination endpoint of a destination node via a GPRS tunneling protocol user plane (GTP-U) tunnel;

filtering ingress GTP-U packets from other types of packets received at the destination node using an open-source operating system filtering module within an operating system kernel;

forwarding a respective ingress GTP-U packet with a public destination IP address to a first queue if a destination IP address matches a defined GTP-U public IP address for the destination node;

extracting one or more ingress GTP-U packets from the first queue and forwarding the one or more ingress GTP-U packets to a user-land operating system process for inspection;

performing network address translation (NAT) of the destination IP address on the one or more ingress GTP-U packets, wherein the performing NAT includes load balancing across a plurality of radio bearers;

placing at least one of the one or more ingress GTP-U packets that have an internal IP address that identifies with a particular radio bearer into a second queue;

forwarding the at least one of the one or more ingress GTP-U packets via the particular radio bearer within a network for processing using an IP forwarding capability of the operating system kernel;

performing network address translation of a source IP address of egress GTP-U packets from a radio bearer via the open-source operating system filtering module before forwarding the egress GTP-U packets to an external network.

12. The non-transitory computer-usable data carrier of claim 11 , wherein the source node comprises a serving GPRS support node.

13. The non-transitory computer-usable data carrier of claim 11 , wherein the destination node comprises a radio network controller.

14. The non-transitory computer-usable data carrier of claim 11 , wherein the operating system comprises an open-source operating system.

15. The non-transitory computer-usable data carrier of claim 14 , wherein the open-source operating system comprises Linux.

Assignments (7)