Automatic return path switching for a signal conditioning device

• US 8,179,814 B2
• Filed: 06/12/2009
• Issued: 05/15/2012
• Est. Priority Date: 03/30/2009
• Status: Expired due to Fees

• Current Assignee: PPC Broadband Incorporated (Belden Inc.)
• Original Assignee: John Mezzalingua Associates Incorporated
• Inventors: Shafer, Steven K., Lawrence, Michael E.
• Primary Examiner(s): SINKANTARAKORN, PAWARIS
• Application Number:
  US12/483,794
• Publication Number:
  US 20100251320A1
• Time in Patent Office: 1,068 Days
• Field of Search: 370/252, 370/253, 370/464, 370/465, 725/118, 725/119, 725/121, 725/122, 725/127, 725/128
• US Class Current: 370/252
• CPC Class Codes: H04N 21/437 Interfacing the upstream path of the transmission network, e.g. for transmitting client requests to a VOD server flow control in data networks H04L47/10; streaming protocols, e.g. RTP or RTCP, H04L65/65; scheduling or organising the servicing of application requests in data packet switching networks H04L67/60
• CPC Class Codes: H04N 7/102 Circuits therefor, e.g. noise reducers, equalisers, amplifiers H04N7/108 takes precedence

Abstract

A premise signal conditioning device is provided that can be inserted into a signal transmission line of a CATV system on a premise of a user. The device includes at least a first diplexer set, each diplexer set including a supplier side diplexer and a premise side diplexer creating a return path for an upstream bandwidth and a forward path for a downstream bandwidth there between. The device further includes a detector configured to measure a level of signals present in a first segment of frequencies between the upstream bandwidth and the downstream bandwidth. The device further includes a switch controller configured to alter a width of the return path from a first width to a second width in response to a level of the signals exceeding a predetermined threshold level.

Claims

1. A premise signal conditioning device that can be inserted into a signal transmission line of a CATV system on a premise of a user, said device comprising:

at least a first diplexer set, each diplexer set comprising a supplier side diplexer and a premise side diplexer creating a return path for an upstream bandwidth and a forward path for a downstream bandwidth there between;

a detector configured to measure a level of signals present in a first segment of frequencies between the upstream bandwidth and the downstream bandwidth, wherein the detector comprises an adjustment mechanism configured to selectively adjust a predetermined threshold level; and

a switch controller configured to alter a width of the return path from a first width to a second width in response to a level of the signals exceeding the predetermined threshold level.

2. The device of claim 1 further comprising:

a second diplexer set; and

a plurality of switches, each switch comprising first and second positions, the first position corresponding to the first diplexer set and the second position corresponding to the second diplexer set,

wherein the switch controller is configured to actuate the switches from the first position to the second position in response to a level of the signals exceeding the predetermined threshold level.

3. The device of claim 1, wherein the first diplexer set is adjustable such that the width of the return path can be adjusted between the first position and the second position.

4. The device of claim 1, wherein the switch controller is configured to alter the width of the upstream bandwidth from a first width to a second width in response to the level of the signals exceeding the predetermined threshold for a predetermined length of time.

5. The device of claim 4, wherein the predetermined amount of time is less than one minute.

6. The device of claim 4, wherein the predetermined amount of time is greater than one minute.

7. The device of claim 1 further comprising a signal amplifier mounted within the forward path.

8. The device of claim 1 further comprising:

a housing having a supplier side and a premise side; and

a signal transmission line between the supplier side and the supplier side diplexer sets, wherein the detector is connected to the signal transmission line, and

wherein the diplexer set, the detector, and the controller are located in the housing.

9. The device of claim 8, wherein the signals pass from the signal transmission line to the detector through a band-pass filter.

10. The device of claim 9, wherein the band-pass filter is configured to pass the first segment of frequencies between the upstream bandwidth and the downstream bandwidth.

11. The device of claim 1, wherein the predetermined threshold is greater than a level of spurious signals within the first segment of frequencies.

12. The device of claim 1, wherein the predetermined threshold is similar to a level of desired frequencies within the upstream bandwidth.

13. The device of claim 1, wherein the predetermined threshold is greater than the level of desired frequencies within the upstream bandwidth.

14. A method for conditioning signals of a downstream bandwidth, the method comprising:

providing at least a first diplexer set, each diplexer set comprising a supplier side diplexer and a premise side diplexer creating a return path for an upstream bandwidth and a forward path for a downstream bandwidth there between;

detecting a level of signals from a first segment of frequencies between the upstream bandwidth and the downstream bandwidth;

selectively adjusting a predetermined threshold level;

changing the width of the return path after the level of the signals exceeds predetermined threshold level.

15. The method of claim 14 further comprising:

providing a second diplexer set; and

providing a plurality of switches, each switch comprising first and second positions, the first position corresponding to the first diplexer set and the second position corresponding to the second diplexer set,

wherein changing the width of the return path comprises actuating the switches from the first position to the second position.

16. The method of claim 14, wherein the step of changing the width of the return path is made after the level of the signals exceed the predetermined threshold for a predetermined amount of time.

17. The method of claim 16, wherein the predetermined amount of time is less than one minute.

18. The method of claim 16, wherein the predetermined amount of time is greater than one minute.

19. The method of claim 14 further comprising amplifying the downstream bandwidth in the forward path.

20. The method of claim 14 further comprising providing a housing to contain at least the first diplexer set, the housing having a supplier side and a premise side.

21. The method of claim 14 wherein the level of signals from the first segment of frequencies is detected in a signal transmission line arranged between the supplier side and the supplier side diplexer set.

22. The method of claim 21, wherein the signals passing from the signal transmission line to the detector pass through a band-pass filter.

23. The method of claim 22, wherein the band-pass filter is configured to pass the first segment of frequencies between the upstream bandwidth and the downstream bandwidth.

24. The method of claim 14, wherein the predetermined threshold is greater than a level of spurious signals within the first segment of frequencies.

25. The method of claim 14, wherein the predetermined threshold is similar to a level of desired frequencies within the upstream bandwidth.

26. The method of claim 14, wherein the predetermined threshold is greater than a level of desired frequencies within the upstream bandwidth.