Integrated environmental control and management system for free-space optical communication systems

• US 6,889,009 B2
• Filed: 04/16/2001
• Issued: 05/03/2005
• Est. Priority Date: 04/16/2001
• Status: Expired due to Fees

• Current Assignee: LightPointe Communications, Inc.
• Original Assignee: LightPointe Communications, Inc.
• Inventors: Willebrand, Heinz
• Primary Examiner(s): Phan, Hanh
• Application Number:
  US09/835,866
• Publication Number:
  US 20020149811A1
• Time in Patent Office: 1,478 Days
• Field of Search: 398/115, 398/118, 398/119, 398/120, 398/135, 398/17, 398/10, 398/13, 398/20, 398/22, 398/23, 398/24, 398/5, 398/121, 398/122, 398/124, 398/128, 398/129, 398/130, 398/131, 398/136, 455/103, 455/74, 455/428, 455/452, 455/427, 455/12.1, 455/13.1, 455/13.4, 370/338, 370/228, 370/216, 370/225, 370/226, 370/351, 370/352, 370/468
• US Class Current: 398/115
• CPC Class Codes: H04B 10/07 Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
• CPC Class Codes: H04B 10/1125 using a single common optical path

Abstract

A method of managing a free-space optical network includes monitoring environmental and weather conditions in the vicinity of one or more free-space optical links in the network. Data is gathered by environmental condition instruments, such as visibility meters, and is used to assess whether atmospheric conditions have deteriorated to the point where operation of one or more free-space links might be in jeopardy. If data from an environmental condition instrument falls below a predetermined level, network data traffic is routed over an alternate communication path, which may include radio frequency (RF) paths, fiber optic cables, wire cables, or other free-space links.

Claims

1. A method of managing a free-space optical network, comprising the steps of:

directing network data traffic over one or more free-space optical links in the free-space optical network;

monitoring one or more environmental conditions in a vicinity of at least one of the one or more free-space optical links; and

routing the network data traffic through an non-wireless alternate communication path in response to data obtained from the step of monitoring one or more environmental conditions in a vicinity of at least one of the one or more free-space optical links;

wherein the step of monitoring one or more environmental conditions comprises the step of collecting data indicative of at least one of the one or more environmental conditions with an instrument located in the vicinity of the at least one of the one or more free-space optical links;

wherein the step of monitoring one or more environmental conditions further comprises the step of;

sending an alarm over the free-space optical network in response to the data indicative of at least one of the one or more environmental conditions.

2. A method in accordance with claim 1, wherein the step of routing the network data traffic through an alternate communication path is performed in response to the alarm.

3. A method of managing a free-space optical network, comprising the steps of:

directing network data traffic over one or more free-space optical links in the free-space optical network;

monitoring one or more environmental conditions in a vicinity of at least one of the one or more free-space optical links;

sending an alarm over the free-space optical network in response to data obtained from the step of monitoring one or more environmental conditions in a vicinity of at least one of the one or more free-space optical links;

routing the network data traffic through a non-wireless alternate communication path in response to the alarm; and

rerouting the network data traffic over the one or more free-space optical links in the free-space optical network in response to additional data obtained from monitoring one or more environmental conditions in a vicinity of at least one of the one or more free-space optical links.

4. A system in accordance with claim 3, wherein the alternate communication path comprises more than one mode of communication.

7. A method in accordance with claim 3, wherein the step of routing the network data traffic through an alternate communication path further comprises the step of:

selecting the alternate communication path.

5. A method of managing a free-space optical network, comprising the steps of:

directing network data traffic over one or more free-space optical links in the free-space optical network;

monitoring one or more environmental conditions in a vicinity of at least one of the one or more free-space optical links;

sending an alarm over the free-space optical network in response to data obtained from the step of monitoring one or more environmental conditions in a vicinity of at least one of the one or more free-space optical links;

selecting an alternate communication path for the network data traffic in response to the alarm;

routing the network data traffic through the alternate communication path;

re-evaluating the alternate communication path selection; and

rerouting the network data traffic over the one or more free-space optical links in the free-space optical network in response to additional data obtained from monitoring one or more environmental conditions in a vicinity of at least one of the one or more free-space optical links.

6. A system in accordance with claim 5, wherein the alternate communication path comprises more than one mode of communication.