Methods, systems, and computer readable media for preventing traffic congestion within a long term evolution (LTE) multi-user equipment (multi-UE) simulator device

• US 9,172,626 B2
• Filed: 03/12/2012
• Issued: 10/27/2015
• Est. Priority Date: 03/12/2012
• Status: Active Grant

• Current Assignee: Keysight Technologies Singapore (Holdings) Pte. Limited. (Keysight Technologies, Inc.)
• Original Assignee: Ixia (Keysight Technologies, Inc.)
• Inventors: Campbell, Damon Lee, Hammond, David, Hough, William Clarry, Wilke, Eric Hugh
• Primary Examiner(s): Weidner, Timothy J
• Application Number:
  US13/418,076
• Publication Number:
  US 20130235727A1
• Time in Patent Office: 1,324 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 43/10 Active monitoring, e.g. heartbeat, ping or trace-route
• CPC Class Codes: H04L 43/12 Network monitoring probes
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04W 24/06 Testing, supervising or monitoring using simulated traffic

Abstract

Methods, systems, and computer readable media for preventing traffic congestion in a long term evolution (LTE) multi-user equipment (multi-UE) simulator device are disclosed. In one example, a method includes transmitting, from a first module to a second module over a shared bus, one of a plurality of LTE subframe signal portions at the beginning of a first transmission interval. The method further includes sending, from the first module to a third module over the shared bus, a trigger signal upon completing the transmission of the LTE signal portion. The method also includes forwarding, from the third module to the second module over the shared bus, decoded control information associated with at least one of the plurality of LTE subframe signal portions during an idle time period defined by the receipt of the trigger signal and the beginning of a second transmission interval.

Claims

1. A method comprising:

in a long term evolution (LTE) multi-user equipment (multi-UE) simulator device,

receiving, at a first module, LTE downlink data from a radio interface;

dividing the LTE downlink data into a plurality of LTE subframe signal portions;

transmitting, from a first module to a second module over a shared bus, one of the plurality of LTE subframe signal portions at the beginning of a first transmission interval;

sending, from the first module to a third module over the shared bus, a trigger signal upon completing the transmission of the LTE signal portion; and

forwarding, from the third module to the second module over the shared bus during an idle time period within the first transmission interval and after the completed transmission of the LTE signal portion, decoded control information associated with at least one of the plurality of LTE subframe signal portions, wherein the idle time period is defined by the sending of the trigger signal and the beginning of a second transmission interval initiated at the end of the first transmission interval, and wherein the trigger signal and the decoded control information are communicated separately from the plurality of LTE subframe signal portions.

2. The method of claim 1 comprising sending, from the second module to the third module over the shared bus, encoded downlink information to be processed into the decoded control information.

3. The method of claim 1 wherein the first module includes a common public radio interface (CPRI) field programmable gate array (FPGA).

4. The method of claim 1 wherein the second module includes a downlink signal chain field programmable gate array (FPGA).

5. The method of claim 1 wherein the third module includes a control digital signal processor (DSP).

6. The method of claim 1 wherein the LTE signal portion includes an orthogonal frequency division multiplexing (OFDM) symbol.

7. The method of claim 1 wherein the shared bus includes a Serial Rapid Input/Output (SRIO) bus.

8. The method of claim 1 wherein the trigger signal includes a Serial Rapid Input/Output (SRIO) write command.

9. The method of claim 1 wherein the decoded control information includes decoded downlink control information (DCI).

10. A system comprising:

a long term evolution (LTE) multi-user equipment (multi-UE) simulator device comprising,

a first module configured for receiving LTE downlink data from a radio interface, dividing the LTE downlink data into a plurality of LTE subframe signal portions, transmitting one of a plurality of the LTE subframe signal portions at the beginning of a first transmission interval, and for transmitting a trigger signal upon completing the transmission of the LTE subframe signal portion;

a second module configured for receiving the one of the plurality of LTE subframe signal portions over a shared bus; and

a third module configured for receiving the trigger signal over the shared bus and for forwarding, during an idle time period within the first transmission interval and after the completed transmission of the LTE signal portion, decoded control information associated with at least one of the LTE subframe signal portions to the second module, wherein the idle time period is defined by the sending of the trigger signal and the beginning of a second transmission interval initiated at the end of the first transmission interval, and wherein the trigger signal and the decoded control information are communicated separately from the plurality of LTE subframe signal portions.

11. The system of claim 10 wherein the second module is further configured for sending, to the third module over the shared bus, encoded downlink information to be processed into the decoded control information.

12. The system of claim 10 wherein the first module includes a common public radio interface (CPRI) field programmable gate array (FPGA).

13. The system of claim 10 wherein the second module includes a downlink signal chain field programmable gate array (FPGA).

14. The system of claim 10 wherein the third module includes a control digital signal processor (DSP).

15. The system of claim 10 wherein the LTE signal portion includes an orthogonal frequency division multiplexing (OFDM) symbol.

16. The system of claim 10 wherein the shared bus includes a Serial Rapid Input/Output (SRIO) bus.

17. The system of claim 10 wherein the trigger signal includes a Serial Rapid Input/Output (SRIO) write command.

18. The system of claim 10 wherein the decoded control information includes decoded downlink control information (DCI).

19. A non-transitory computer readable medium comprising computer executable instructions embodied in a computer readable medium that when executed by a processor of a computer control the computer to perform steps comprising:

in a long term evolution (LTE) multi-user equipment (multi-UE) simulator device,

receiving, at a first module, LTE downlink data from a radio interface;

dividing the LTE downlink data into a plurality of LTE subframe signal portions;

transmitting, from a first module to a second module over a shared bus, one of the plurality of LTE subframe signal portions at the beginning of a first transmission interval;

sending, from the first module to a third module over the shared bus, a trigger signal upon completing the transmission of the LTE signal portion; and

forwarding, from the third module to the second module over the shared bus during an idle time period within the first transmission interval and after the completed transmission of the LTE signal portion, decoded control information associated with at least one of the plurality of LTE subframe signal portions, wherein the idle time period is defined by the sending of the trigger signal and the beginning of a second transmission interval initiated at the end of the first transmission interval, and wherein the trigger signal and the decoded control information are communicated separately from the plurality of LTE subframe signal portions.