Packet forwarding in wireless networks

• US 9,596,641 B2
• Filed: 04/23/2016
• Issued: 03/14/2017
• Est. Priority Date: 01/04/2012
• Status: Active Grant

• Current Assignee: Ofinno, LLC
• Original Assignee: Ofinno Technologies, LLC (Ofinno, LLC)
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Chriss, Andrew
• Assistant Examiner(s): KIRILLOVA, ELLEN A
• Application Number:
  US15/136,918
• Publication Number:
  US 20160242097A1
• Time in Patent Office: 325 Days
• Field of Search: 370/328
• US Class Current: 1/1
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 45/50 using label swapping, e.g. multi-protocol label switch [MPLS]
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04W 36/144 over a different radio air interface technology
• CPC Class Codes: H04W 40/00 Communication routing or communication path finding
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

A wireless network site comprises a base station and a cell site gateway. The cell site gateway comprises a first interface connected to the base station, a second interface connected to a packet network gateway, a forwarding layer, and a third interface connected to a control server to exchange control plane information. The forwarding layer transmits and receive packets. The control plane information comprises at least one first label value for transmitting a first plurality of packets to the base station and at least one second label value for transmitting a second plurality of packets to the packet network gateway.

Claims

1. A wireless network site comprising:

(a) a first base station, the first base station;

(i) communicating employing a wireless technology with at least one wireless device; and

(ii) communicating with a cellular network gateway through a cell site gateway; and

(b) the cell site gateway, the cell site gateway comprising;

(i) a first interface connected to the first base station;

(ii) a second interface connected to a packet network gateway;

(iii) a third interface connected to a control server to exchange control plane information to program a forwarding layer, the control plane information comprising at least one first label value and at least one second label value,

wherein the control server exchanges the control plane information with the packet network gateway; and

(iv) the forwarding layer for;

(1) transmitting a second plurality of packets to the packet network gateway employing the second interface;

(2) receiving a first plurality of packets from the packet network gateway employing the second interface;

(3) attaching at least one of the at least one second label to the second plurality of packets; and

(4) removing at least one of the at least one first label from the first plurality of packets.

2. The wireless network site of claim 1, wherein the forwarding layer further comprises swapping label on a third plurality of packets.

3. The wireless network site of claim 1, wherein the cell site gateway comprises of a path computation engine.

4. The wireless network site of claim 1, wherein the cell site gateway exchanges the control plane information employing RSVP-TE via the third interface.

5. The wireless network site of claim 1, wherein the cell site gateway exchanges the control plane information employing MPLS-TP.

6. The wireless network site of claim 1, wherein the cell site gateway exchanges the control plane information employing a label distribution mechanism via the third interface.

7. The wireless network site of claim 1, wherein the cell site gateway comprises of routing functionality supporting a link state routing protocol.

8. A wireless network site comprising:

(a) a first base station, the first base station;

(i) communicating employing a wireless technology with at least one wireless device;

(ii) communicating with a second base station through a first cell site gateway; and

(iii) communicating with a cellular network gateway through the first cell site gateway; and

(b) the first cell site gateway, the first cell site gateway comprising;

(i) a first interface connected to the first base station;

(ii) a second interface communicating;

(1) with a packet network gateway; and

(2) with the second base station through a second cell site gateway;

(iii) a third interface connected to a control server to exchange control plane information to program a forwarding layer, the control plane information comprising at least one first label value, at least one second label value, and at least one parameter characterizing the second interface; and

(iv) the forwarding layer for;

(1) transmitting a second plurality of packets to the packet network gateway employing the second interface;

(2) receiving a first plurality of packets from the packet network gateway employing the second interface;

(3) attaching at least one of the at least one second label to the second plurality of packets; and

(4) removing at least one of the at least one first label from the first plurality of packets.

9. The wireless network site of claim 8, wherein the forwarding layer further swaps at least one third label from a third plurality of packets forwarded to the second cell site gateway.

10. The wireless network site of claim 8, wherein the packet network gateway is connected to the cellular network gateway.

11. The wireless network site of claim 8, wherein the second plurality of packets are transmitted to the packet network gateway via at least one intermediate network node.

12. The wireless network site of claim 8, wherein the at least one first label and the at least one second label comprising:

a) a label value;

b) a class of service; and

c) bottom of label stack flag.

13. The wireless network site of claim 8, wherein the cellular network gateway is an LTE Serving Gateway.

14. The wireless network site of claim 8, wherein the cellular network gateway is connected to an LTE Serving Gateway.

15. The wireless network site of claim 8, wherein the first base station forwards at least one of the first plurality packets received from the cell site gateway to the second base station during the handover procedure.

16. The wireless network site of claim 8, wherein the first base station forwards at least one of the first plurality of packets received from the cell site gateway to the first cell site gateway during the handover procedure.

17. A wireless network site comprising:

(a) a first base station, the first base station;

(i) communicating employing a wireless technology with at least one wireless device; and

(ii) communicating with a cellular network gateway through a cell site gateway; and

(b) the cell site gateway, the cell site gateway comprising;

(i) a first interface connected to the first base station;

(ii) a second interface connected to a packet network gateway;

(iii) a third interface connected to a control server to exchange control plane information to program a forwarding layer, the first control plane information employed to program at least;

(1) a first flow entry comprising a first match field; and

(2) a second flow entry comprising a second match field; and

wherein the control server exchanges second control plane information with the packet network gateway; and

(iv) the forwarding layer for;

(1) transmitting, to the first base station via the first interface, a first plurality of packets if the first plurality of packets matches the first match field; and

(2) transmitting, to the packet network gateway via the second interface, a second plurality of packets if the second plurality of packets matches the second match field.

18. The wireless network site of claim 17, wherein the control server is an off-line management server.

19. The wireless network site of claim 17, wherein the control server is an off-line network controller.

20. The wireless network site of claim 17, wherein the control server exchanges information with the cell site gateway employing the following:

a) signaling mechanisms for hardware programming;

b) signaling mechanism for forwarding tables; and

c) signaling mechanism for device management and monitoring.