Dual band wireless communication having high availability and high bandwidth

• US 7,394,988 B1
• Filed: 07/09/2002
• Issued: 07/01/2008
• Est. Priority Date: 07/09/2002
• Status: Expired due to Fees

• Current Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Johnson, Harold W., Pan, James J., Evans, Mark
• Primary Examiner(s): TRAN, DZUNG D
• Application Number:
  US10/191,240
• Time in Patent Office: 2,184 Days
• Field of Search: 398/46, 398/74, 398/115, 398/116, 398/118, 398/120, 398/135
• US Class Current: 398/115
• CPC Class Codes: H04B 10/1125 using a single common optical path

Abstract

A communication system receives information from a first communication link. The communication system transfers a free-space optical signal carrying the information and transfers a high-GHz wireless signal carrying the information. The communication system receives the free-space optical signal carrying the information and receives the high-GHz wireless signal carrying the information. The communication system assesses communication performance for the free-space optical signal and the high-GHz wireless signal, and based on the communication performance, selects between the free-space optical signal and the high-GHz wireless signal to provide the information. The communication system transfers the information to a second communication link based on the selection.

Claims

1. A method of operating a communication system comprising:

receiving information from a first communication link;

transferring a free-space optical signal carrying the information and transferring a high-GHz wireless signal carrying the information;

receiving the free-space optical signal carrying the information and receiving the high-GHz wireless signal carrying the information;

selecting a first one of the free-space optical signal and the high-GHz wireless signal as a primary receive signal, wherein the remaining one of the free-space optical signal and the high-GHz wireless signal comprises a secondary receive signal, and wherein the primary receive signal initially provides the information to a second communication link;

assessing communication performance for the primary receive signal and the secondary receive signal;

while the primary receive signal provides the information to the second communication link, switching to the secondary receive signal based upon a first comparison between the communication performance for the primary receive signal and a first threshold, and a second comparison between the communication performance for the secondary receive signal and a second threshold; and

while the secondary receive signal provides the information to the second communication link, switching to the primary receive signal based upon a third comparison between the communication performance of the primary receive signal and a third threshold, without considering the communication performance for the secondary receive signal.

2. The method of claim 1 wherein the communication performance comprises bit errors.

3. The method of claim 1 wherein the communication performance comprises severe bit error seconds.

4. The method of claim 1 wherein the communication performance comprises framing errors.

5. The method of claim 1 wherein the communication performance comprises time without bit errors.

6. The method of claim 1 wherein the communication performance comprises time without severe bit error seconds.

7. The method of claim 1 wherein the communication performance comprises time without framing errors.

8. The method of claim 1 wherein the high-GHz wireless signal comprises a local multipoint distribution signal.

9. The method of claim 1 wherein the high-GHz wireless signal comprises one of a V-band signal and a W-band signal.

10. The method of claim 1 wherein:

selecting the primary receive signal comprises allowing a user to select the primary receive signal; and

wherein the method further comprises allowing the user to select performance assessment metrics and the first, second, and third thresholds.

11. A communication system comprising:

a line interface configured to receive first information from a communication link and transfer second information to the communication link;

a free-space optical interface configured to receive the first information from the line interface and transfer a first free-space optical signal carrying the first information, and to receive a second free-space optical signal carrying the second information and transfer the second information;

a high-GHz wireless interface configured to receive the first information from the line interface and transfer a first high-GHz wireless signal carrying the first information, and to receive a second high-GHz wireless signal carrying the second information and transfer the second information; and

a control system configured to;

select a first one of the second free-space optical signal and the second high-GHz wireless signal as a primary receive signal, wherein the remaining one of the second free-space optical signal and the second high-GHz wireless signal comprises a secondary receive signal, and wherein the primary receive signal initially provides the second information to the line interface for transfer to the communication link;

assess communication performance for the primary receive signal and the secondary receive signal;

while the primary receive signal provides the second information to the line interface, switch to the secondary receive signal based upon a first comparison between the communication performance for the primary receive signal and a first threshold, and a second comparison between the communication performance for the secondary receive signal and a second threshold; and

while the secondary receive signal provides the second information to the line interface, switch to the primary receive signal based upon a third comparison between the communication performance of the primary receive signal and a third threshold, without considering the communication performance for the secondary receive signal.

12. The communication system of claim 11 wherein the communication performance comprises bit errors.

13. The communication system of claim 11 wherein the communication performance comprises severe bit error seconds.

14. The communication system of claim 11 wherein the communication performance comprises framing errors.

15. The communication system of claim 11 wherein the communication performance comprises time without bit errors.

16. The communication system of claim 11 wherein the communication performance comprises time without severe bit error seconds.

17. The communication system of claim 11 wherein the communication performance comprises time without framing errors.

18. The communication system of claim 11 wherein the first high-GHz wireless signal and the second high-GHz wireless signal comprise local multipoint distribution signals.

19. The communication system of claim 11 wherein the first high-GHz wireless signal and the second high-GHz wireless signal comprise V-band signals or W-band signals.

20. The communication system of claim 11 wherein the control system includes a user interface configured to allow a user to select the primary receive signal, performance assessment metrics, and the first, second, and third thresholds.