Elevated communication hub and method of operation therefor

• US 6,151,308 A
• Filed: 12/30/1996
• Issued: 11/21/2000
• Est. Priority Date: 12/30/1996
• Status: Expired due to Term

• Current Assignee: CDC Propriete Intellectuelle
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Aguirre, Sergio, Kapoor, Vijay, Ibanez-Meier, Rodrigo
• Primary Examiner(s): TON, DANG T
• Application Number:
  US08/774,764
• Time in Patent Office: 1,422 Days
• Field of Search: 370/316, 370/216, 370/324, 370/350, 370/508, 370/519, 370/310, 370/318, 370/334, 370/338, 370/351, 370/352, 375/268, 375/298, 375/362, 342/359, 342/352, 342/356, 342/353, 342/357, 455/3.2, 455/3.3, 455/5.1, 455/427, 455/428, 455/429, 455/430, 455/431
• US Class Current: 370/316
• CPC Class Codes: G01S 3/02 using radio waves
• CPC Class Codes: H04B 7/18508 with satellite system used as relay, i.e. aeronautical mobile satellite service

Abstract

A method and apparatus for communicating between wireless communication devices (120, 131, 140) uses a high-altitude communication platform (110) to provide an interface between the devices. The platform (110) enables multiple signals from multiple sources to be combined into one signal which is sent to a ground device (120). The ground device (120) can send a combined signal to the platform (110) which the platform (110) can then separate and send to multiple destinations. The platform (110) can be used as a bridge between satellites (1310, 1312) which are incapable of direct communication, thus enabling a fully connected network to exist without full coverage from satellites.

Claims

1. A communication platform which communicate with a satellite, the communication platform comprising:

a first signal interface suitable to communicate with the satellite over a first link which carries first signals;

a second signal interface suitable to communicate with a communication device located proximate to a surface of the earth at a location over a second link which carries second signals;

a processor, coupled to the first signal interface and the second signal interface, the processor suitable to provide an interface between the satellite and the communication device by processing the first signals and the second signals;

a third signal interface, coupled to the processor, suitable to receive third signals from a signal source; and

wherein the processor is further suitable to receive the third signals from the third signal interface and to combine the first signals with the third signals to form the second signals, and provide the second signals to the communication device using the second signal interface; and

wherein the communication platform is non-orbiting and is suitable for positioning substantially above the location on the surface of the earth.

2. The communication platform as claimed in claim 1, wherein the third signal interface is suitable to receive the third signals from a second satellite.

3. The communication platform as claimed in claim 1, wherein the third signal interface is suitable to receive the third signals from a device located proximate to the surface of the earth.

4. The communication platform as claimed in claim 1, wherein the processor is further suitable to demultiplex the first signals and the third signals and suitable to multiplex the second signals.

5. A communication platform which communicates with a satellite, the communication platform comprising:

a first signal interface suitable to communicate with the satellite over a first link which carries first signals;

a second signal interface suitable to communicate with a communication device located proximate to a surface of the earth at a location over a second link which carries second signals;

a processor, coupled to the first signal interface and the second signal interface, the processor suitable to provide an interface between the satellite and the communication device by processing the first signals and the second signals;

a third signal interface, coupled to the processor, suitable to send third signals to a destination device; and

wherein the processor is further suitable to receive the second signals from the second signal interface and to separate the second signals into the first signals and the third signals, send the first signals to the satellite using the first signal interface, and send the third signals to the destination device using the third signal interface; and

wherein the communication platform is non-orbiting and is suitable for positioning substantially above the location on the surface of the earth.

6. The communication platform as claimed in claim 5, wherein the processor is further suitable to demultiplex the second signals, determine toward which destinations to route the first signals and the third signals, multiplex the first signals and the third signals, and send the first signals and the third signals toward the destinations.

7. A communication platform which communicates with a satellite, the communication platform comprising:

a first signal interface suitable to communicate with the satellite over a first link which carries first signals;

a second signal interface suitable to communicate with a communication device located proximate to a surface of the earth at a location over a second link which carries second signals; and

a processor, coupled to the first signal interface and the second signal interface, the processor suitable to provide an interface between the satellite and the communication device by processing the first signals and the second signals;

wherein;

the first signal interface is suitable to receive the first signals which were transmitted by the satellite at a power level which is sufficient for reception by the non-orbiting communication platform but is insufficient for reception by the communication device, and the non-orbiting communication platform is positioned at an altitude which enables reception of the first signals;

the processor is suitable to prepare the first signals for retransmission to the communication device, resulting in the second signals;

the second signal interface is suitable to send the second signals to the communication device; and

the communication platform is non-orbiting and is suitable for positioning substantially above the location on the surface of the earth.

8. The communication platform as claimed in claim 7, wherein:

the processor prepares the first signals by changing at least one parameter which defines transmission characteristics of the first signals, resulting in the second signals.

9. The communication platform as claimed in claim 7, wherein:

the processor prepares the first signals by coordinating amplification of the first signals, resulting in the second signals.

10. A communication platform which communicates with a satellite, the communication platform comprising:

a first signal interface suitable to communicate with the satellite over a first link which carries first signals;

a second signal interface suitable to communicate with a communication device located proximate to a surface of the earth at a location over a second link which carries second signals; and

a processor, coupled to the first signal interface and the second signal interface, the processor suitable to provide an interface between the satellite and the communication device by processing the first signals and the second signals;

wherein;

the second signal interface is suitable to receive the second signals from the communication devices, wherein the communication devices transmitted the second signals at a power level which is sufficient for reception by the non-orbiting communication platform but is insufficient for reception by the satellite, and the non-orbiting communication platform is positioned at an altitude which enables reception of the second signals;

the processor is suitable to prepare the second signals for retransmission to the satellite, resulting in the first signals;

the first signal interface is suitable to send the first signals to the satellite; and

the communication platform is non-orbiting and is suitable for positioning substantially above the location on the surface of the earth.

11. The communication platform as claimed in claim 10, wherein:

the processor prepares the second signals by changing at least one parameter which defines transmission characteristics of the second signals, resulting in the first signal.

12. The communication platform as claimed in claim 10, wherein:

the processor prepares the second signals by coordinating amplification of the second signals, resulting in the first signals.

13. A remote sensing device comprising:

a receiver suitable to receive information from a control facility;

a sensor suitable to sense physical phenomenon and to generate data describing the physical phenomenon;

a processor, coupled to the sensor, suitable to process the data; and

a control facility transmitter, coupled to the processor, suitable to send the data to a control facility, wherein the remote sensing device is positioned on a non-orbiting communications platform and the communication platform is suitable for positioning above the earth at a high altitude;

wherein the sensor is suitable to sense data related to fires and to generate data describing the fires; and

wherein the signal transmitter is suitable to send the data to the control facility so that the control facility can distribute the data as needed in order for the fires to be controlled.

14. A remote sensing device comprising:

a receiver suitable to receive information from a control facility;

a sensor suitable to sense physical phenomenon and to generate data describing the physical phenomenon;

a processor, coupled to the sensor, suitable to process the data; and

a control facility transmitter, coupled to the processor, suitable to send the data to a control facility, wherein the remote sensing device is positioned on a non-orbiting communications platform and the communication platform is suitable for positioning above the earth at a high altitude;

wherein the sensor is suitable to sense data related to pollution and to generate data describing the pollution; and

wherein the signal transmitter is suitable to send the data to the control facility so that the control facility can distribute the data in order to give notice of pollution levels.

15. A method for communicating between a satellite and a communication device located proximate to a surface of the earth, the method comprising the steps of:

establishing a first link with the satellite, wherein first signals are communicated over the first link and the first link is established by a non-orbiting communication platform which is suitable for positioning above the earth at an altitude which is substantially above a location on a surface of the earth;

establishing, by the non-orbiting communication platform, a second link with the communication device, wherein second signals are communicated over the second link;

providing, by the non-orbiting communication platform, an interface between the satellite and the communication device by processing the first signals and the second signals;

establishing a third link with a destination device;

receiving the second signals;

separating the second signals into the first signals and the third signals;

sending the first signals to the satellite; and

sending the third signals to the destination device using the third signal interface.

16. A method for communicating between a satellite and a communication device located proximate to a surface of the earth, the method comprising the steps of:

establishing a first link with the satellite, wherein first signals are communicated over the first link and the first link is established by a non-orbiting communication platform which is suitable for positioning above the earth at an altitude which is substantially above a location on a surface of the earth;

establishing, by the non-orbiting communication platform, a second link with the communication device, wherein second signals are communicated over the second link;

providing, by the non-orbiting communication platform, an interface between the satellite and the communication device by processing the first signals and the second signals;

receiving low-power signals over the first link, wherein the low-power signals were transmitted by the satellite at a power level which is sufficient for reception by the non-orbiting communication platform but is insufficient for reception by the communication device, and the non-orbiting communication platform is positioned at an altitude which enables reception of the low-power signals; and

wherein the step of providing the interface comprises the steps of preparing the low-power signals for retransmission to the communication device, resulting in the second signals, and sending the second signals to the communication device.

17. A method for communicating between a satellite and a communication device located proximate to a surface of the earth, the method comprising the steps of:

establishing a first link with the satellite, wherein first signals are communicated over the first link and the first link is established by a non-orbiting communication platform which is suitable for positioning above the earth at an altitude which is substantially above a location on a surface of the earth;

establishing, by the non-orbiting communication platform a second link with the communication device, wherein second signals are communicated over the second link;

providing, by the non-orbiting communication platform, an interface between the satellite and the communication device by processing the first signals and the second signals;

receiving low-power signals over the second link, wherein the low-power signals were transmitted by the communication devices at a power level which is sufficient for reception by the non-orbiting communication platform but is insufficient for reception by the satellite, and the non-orbiting communication platform is positioned at an altitude which enables reception of the second signals; and

wherein the step of providing the interface comprises the steps of preparing the low-power signals for retransmission to the satellite, resulting in the first signals, and sending the first signals to the satellite.