System and method of automatically maintaining a line-of-sight communication channel

• US 8,078,207 B2
• Filed: 07/21/2009
• Issued: 12/13/2011
• Est. Priority Date: 07/21/2009
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Burns, Robert, Holmquist, Kurt, Hellickson, Dean R.
• Primary Examiner(s): TRINH, TAN H
• Application Number:
  US12/506,730
• Publication Number:
  US 20110021231A1
• Time in Patent Office: 875 Days
• Field of Search: 455/509, 455/456, 455/435, 455/406, 455/404.2, 455/404.1, 455/456.1, 455/456.3, 455/521, 455/414.2, 455/432, 455/450, 455/451, 455/452.1, 455/419, 455/418, 455/464, 370/352, 370/353, 370/354, 370/355, 370/400
• US Class Current: 455/509
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

One exemplary embodiment is directed to a method of automatically maintaining a line-of-sight communication channel. The method comprises determining information about each communication resource that is accessible in a region through which a mobile system is moving. The method further comprises determining information about the mobile system. The method further comprises performing a line-of-sight (LOS) analysis for each of the communication resources based at least in part on a respective location and a respective elevation for the respective communication resource and the current location of the mobile system and a current elevation for the mobile system. The method further comprises determining if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed and establishing the new communication link if it is determined that the new communication link should be established.

Claims

1. A method of automatically maintaining a line-of-sight communication channel, the method comprising:

determining information about each communication resource that is accessible in a region through which a mobile system is moving, wherein the information about each communication resource includes a respective location for that respective communication resource;

determining information about the mobile system, wherein the information about the mobile system includes a current location for the mobile system;

performing a line-of-sight (LOS) analysis for each of the communication resources based at least in part on the respective location and a respective elevation for the respective communication resource and the current location of the mobile system and a current elevation for the mobile system, wherein the respective elevation for that respective communication resource is obtained from topological information maintained at the mobile system using the respective location for that respective communication resource and the current elevation for the mobile system is obtained from the topological information using the current location for the mobile system; and

determining if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed and establishing the new communication link if it is determined that the new communication link should be established.

2. The method of claim 1, wherein performing a LOS analysis for each of the communication resources comprises determining an optimal setting for establishing a respective communication link with that respective communication resource;

and

wherein the method further comprises determining if a setting for a current communication link that is established with the mobile system should be adjusted based at least on the LOS analyses that were performed and adjusting the setting if it is determined that the setting should be adjusted.

3. The method of claim 1, further comprising outputting information about the communication resources in the region for a user of the mobile system.

4. The method of claim 3, wherein outputting information about the communication resources in the region for the user of the mobile system comprises at least one of:

outputting information about a respective coverage area for each of the communication resources in the region; and

outputting information indicating where the mobile system can move to establish a communication link.

5. The method of claim 1, further comprising updating the information about the communication resources that is maintained at the mobile system.

6. The method of claim 1, wherein the information about the communication resources includes a height of an antenna associated with each communication resource and the information about the mobile system includes a height of an antenna associated with the mobile system;

and

wherein performing a LOS analysis for each of the communication resources comprises performing a LOS analysis for each of the communication resources using the height of the antenna associated with each communication resource and the height of the antenna associated with the mobile system.

7. The method of claim 1, wherein the information about the communication resources includes at least one of:

information about communication capabilities of each communication resource, information about how many hops are required to establish a communication channel using each communication resource, and information about a respective coverage area for each communication resource; and

wherein determining if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed comprises determining if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed and the at least one of the information about the communication capabilities of each communication resource, the information about how many hops are required to establish a communication channel using each communication resource, and the information about the respective coverage area for each communication resource.

8. The method of claim 1, wherein the information about the mobile system comprises at least one of a current direction, a current velocity, and a current acceleration of the mobile system;

wherein determining if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed comprises determining if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed and the at least one of the current direction, the current velocity, and the current acceleration of the mobile system.

9. The method of claim 1, wherein the current location of the mobile system is received from a GPS receiver included in the mobile system.

10. A mobile system for automatically maintaining a line-of-sight communication channel, the system comprising:

a transceiver to establish a line-of-sight communication link;

a global positioning system (GPS) receiver;

a data store to store topological information and information about communication resources that are accessible in a region through which the mobile system is moving;

a programmable processor to execute software, wherein the programmable processor is coupled to the transceiver, the GPS receiver, and the data store;

wherein the software, when executed by the programmable processor, is operable to cause the mobile system to;

determine information about each communication resource that is accessible in a region through which a mobile system is moving, wherein the information about each communication resource includes a respective location for that respective communication resource;

determine information about the mobile system, wherein the information about the mobile system includes a current location for the mobile system;

perform a line-of-sight (LOS) analysis for each of the communication resources based at least in part on the respective location of the respective communication resource and a respective elevation for the respective communication resource and the current location of the mobile system and a current elevation for the mobile system, wherein the respective elevation for that respective communication resource is obtained from the topological information using the respective location for that respective communication resource and the current elevation for the mobile system is obtained from the topological data using the current location for the mobile system; and

determine if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed and establishing the new communication link if it is determined that the new communication link should be established.

11. The mobile system of claim 10, wherein the LOS analysis that is performed for each of the communication resources, as a part thereof, determines an optimal setting for an adjustable setting associated with establishing a respective communication link with each respective communication resource;

and

wherein the software, when executed by the programmable processor, is operable to cause the mobile system to determine if a setting for a current communication link that is established with the mobile system should be adjusted based at least on the LOS analyses that were performed and adjust the setting if it is determined that the setting should be adjusted.

12. The mobile system of claim 10, further comprising at least one output device coupled to the programmable processor, wherein the software, when executed by the programmable processor, is operable to cause the mobile system to output, on the at least one output device, information about the communication resources in the region for a user of the mobile system.

13. The mobile system of claim 12, wherein the information about the communication resources in the region that is output on the at least one output device for the user of the mobile system comprises at least one of:

information about a respective coverage area for each of the communication resources in the region; and

information indicating where the mobile system can move to establish a communication link.

14. The mobile system of claim 10, wherein the software, when executed by the programmable processor, is operable to cause the mobile system to update information about the communication resources that is stored in the data store.

15. The mobile system of claim 10, wherein the information about the communication resources includes a height of an antenna associated with each communication resource and the information about the mobile system includes a height of an antenna associated with the mobile system;

and

wherein the LOS analysis that is performed for each of the communication resources uses the height of the antenna associated with each communication resource and the height of the antenna associated with the mobile system.

16. The mobile system of claim 10, wherein the information about the communication resources includes at least one of:

information about communication capabilities of each communication resource, information about how many hops are required to establish a communication channel using each communication resource, and information about a respective coverage area for each communication resource; and

wherein the software, when executed by the programmable processor, is operable to cause the mobile system to determine if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed and the at least one of the information about the communication capabilities of each communication resource, the information about how many hops are required to establish a communication channel using each communication resource, and the information about the respective coverage area for each communication resource.

17. The mobile system of claim 10, wherein the information about the mobile system comprises at least one of a current direction, a current velocity, and a current acceleration of the mobile system;

wherein the software, when executed by the programmable processor, is operable to cause the mobile system to determine if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed and the at least one of the current direction, the current velocity, and the current acceleration of the mobile system.

18. The mobile system of claim 10, wherein the transceiver comprises at least one of a radio frequency transceiver and a free-space optics transceiver.

19. A program product for automatically maintaining a line-of-sight communication channel using a transceiver included in a mobile system, the program-product comprising a processor-readable medium on which program instructions are embodied, wherein the program instructions are operable, when executed by at least one programmable processor included in the mobile system, to cause the mobile system to:

determine information about each communication resource that is accessible in a region through which the mobile system is moving, wherein the information about each communication resource includes a respective location for that respective communication resource;

determine information about the mobile system, wherein the information about the mobile system includes a current location for the mobile system;

perform a line-of-sight (LOS) analysis for each of the communication resources based at least in part on the respective location of the respective communication resource and a respective elevation for the respective communication resource and the current location of the mobile system and a current elevation for the mobile system, wherein the respective elevation for that respective communication resource is obtained from topological information maintained at the mobile system using the respective location for that respective communication resource and the current elevation for the mobile system is obtained from the topological information using the current location for the mobile system; and

determine if a new communication link should be established with at least one of the communication resources based at least on the LOS analyses that were performed and establishing the new communication link if it is determined that the new communication link should be established.

20. The program product of claim 19, wherein the program instructions are further operable, when executed by at least one programmable processor included in the mobile system, to cause the mobile system to output for a user of the mobile system, on at least one output device coupled to the mobile system, information about the communication resources in the region.