Frequency allocation for shared spectrum transmitter based on location

• US 5,794,151 A
• Filed: 12/22/1995
• Issued: 08/11/1998
• Est. Priority Date: 12/22/1995
• Status: Expired due to Term

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Ruthenberg, Ross E., D'Amico, Thomas V., McDonald, James A., Freeburg, Thomas A.
• Primary Examiner(s): Vo, Nguyen
• Assistant Examiner(s): Kincaid, Lester G.
• Application Number:
  US08/577,318
• Time in Patent Office: 963 Days
• Field of Search: 455/33.1, 455/34.1, 455/34.2, 455/62, 455/63, 455/426, 455/446, 455/448, 455/450, 455/454, 455/456, 455/507, 379/59, 379/60, 370/329, 342/352, 342/357
• US Class Current: 455/454
• CPC Class Codes: G01S 1/045 Receivers
• CPC Class Codes: H04W 16/16 for PBS [Private Base Station] arrangements
• 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 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A shared spectrum communications unit and system provides communications without interfering with incumbent point-to-point receivers. This system includes a transmitter (e.g., of a PCS device) and a geographical location device which is operatively associated with the transmitter. The geographical locating device determines the position of the transmitter, and provides position information to a frequency authorization device. Geographical information pertaining to the PCS device is compared with the locations of the incumbent point-to-point receivers, using a database of the frequency authorization device including the locations of the point-to-point receivers, and a frequency allocation/authorization is generated to the PCS device when the PCS device is located outside of a predetermined range associated with local point-to-point receivers. An authorized frequency is stored and employed by the frequency authorization device for control of the operating frequency of the PCS device.

Claims

1. A communications device, for radio communication with a shared spectrum communications system, which avoids interfering with point-to-point receivers of another communication system, said device comprising:

a device transmitter, within said device;

a geographical locating device physically coupled to said device transmitter for determining the geographical position of said device transmitter;

means, within said device, physically coupled to and in communication with said geographical locating device for generating a frequency authorization, said frequency authorization generating means including a database within said device of locations of incumbent point-to-point receivers, said frequency authorization generating means receiving information from said geographical locating device and comparing the location of said device transmitter operatively associated with said geographical locating device to the locations of incumbent point-to-point receivers and automatically generating a frequency authorization within said device when said device is located outside of a predetermined zone associated with local incumbent point-to-point receivers;

means, within said device, in communication with said frequency authorization generating means for storing a frequency which is authorized by said frequency authorization generating means, said frequency storing means maintaining and employing said frequency authorized by said frequency authorization means for the control of the operating frequency of said device; and

means, within said device, for transferring said frequency authorization from said frequency authorization generating means to said frequency storing means.

2. The system of claim 1, said geographical locating device comprising a global positioning system receiver.

3. The system of claim 1, said geographical locating device comprising a Loran-C device.

4. The system of claim 1, said geographical locating device comprising a manual authorization device.

5. The system of claim 1, said geographical locating device comprising a broadcast signal receiver.

6. The system of claim 1, said geographical locating device comprising a radio frequency communications device.

7. The system of claim 1, further comprising means for polling a geographical position of the device transmitter.

8. The system of claim 7, wherein the means for polling comprises means for detecting a change in the geographical position of said geographical locating device.

9. The system of claim 8, wherein the means for detecting is selected from a group consisting of:

a proximity sensor;

an accelerometer;

a pendulum;

a gyroscope;

mechanical interlocks; and

electrical interlocks.

10. The system of claim 9, wherein the means for detecting is further operable for disconnecting the transmitter from a power source.

11. The system of claim 10, wherein the means for detecting is further operable for disconnecting from a power source selected from a group consisting of:

a telephone line; and

alternating current power.

12. The system of claim 8, wherein the means for detecting said change in the geographical position of said geographical locating device operatively associated with said device transmitter includes means for disabling the device transmitter.

13. The system of claim 12, wherein the means for disabling the device transmitter includes means for reaquiring a geographical position of the device transmitter in order to reauthorize said frequency.

14. The system of claim 1, wherein the geographical locating device is further operable for re-evaluating the position of the device transmitter.

15. The system of claim 14, wherein the geographical locating device is further operable for detecting a change in the geographical position of said geographical locating device.

16. The system of claim 1, wherein the means for generating is further operable for relaying the frequency authorization via a predetermined number of wireless links in the communications system.

17. A communications unit which avoids interfering with incumbent point-to-point receivers, said communications unit comprising;

a transmitter within said unit;

a global positioning system (GPS) receiver for determining the geographical position of said communications unit;

a processor within said unit, physically connected to and in communication with the transmitter and GPS receiver, operable as a frequency authorization generator operatively associated with a database, within said unit, of locations of incumbent point-to-point receivers, said frequency authorization generator receiving information from said GPS receiver for comparing the location of said transmitter to incumbent locations of point-to-point receivers and automatically generating a frequency authorization when said communications unit is outside of any predetermined region associated with said point-to-point receivers; and

a frequency store, within said unit, coupled to said frequency authorization generator for storing a frequency which is authorized by said frequency authorization generator, said frequency store maintaining and employing said frequency authorized by said frequency authorization generator for the control of the operating frequency of said communications unit.

18. A method of operating a shared spectrum communications unit which avoids interfering with incumbent point-to-point receivers, said method comprising the steps of:

providing, within said communications unit, a communications system transmitter;

providing a geographical locating device physically and operatively associated with said communications unit;

providing, within said communications unit, a database of locations of incumbent point-to-point receivers;

determining, within said communications unit, the geographical position of said communications unit using said geographical locating device;

comparing, within said communications unit, said geographical position with said database of locations of incumbent point-to-point receivers;

authorizing, within said communications unit, an operating frequency also used by an incumbent point-to-point receiver for use by said communications system transmitter based on the comparison of said geographical location of said communications unit when the geographical location of said communications unit is outside of a predetermined region associated with said point-to-point receiver; and

storing, within said communications unit, the operating frequency authorized for use by said communications system transmitter.

19. The method of claim 18, further comprising the step of:

using a global positioning system receiver for determining the geographic location of said communications unit.

20. The method of claim 18, further comprising the step of:

using a Loran-C device for determining the geographic location of said communications unit.

21. The method of claim 18, further comprising the step of:

using a manual authorization device for determining the geographic location of said communications unit.

22. The method of claim 18, further comprising the step of:

using a broadcast signal receiver for determining the geographic location of said communications unit.

23. The method of claim 18, further comprising the step of:

using a radio frequency communications device for determining the geographic location of said communications unit.