Method and system for increasing data transmission rates

• US 7,751,778 B1
• Filed: 08/30/2005
• Issued: 07/06/2010
• Est. Priority Date: 08/30/2005
• Status: Active Grant

• Current Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Ngan, John C. W.
• Primary Examiner(s): FERGUSON, KEITH
• Application Number:
  US11/216,248
• Time in Patent Office: 1,771 Days
• Field of Search: 455/11.1, 455/7, 4554141-4144, 455/13.4, 455/24, 455/466, 455/9, 455/16, 455/500, 455/517, 455/422.1, 455/403, 455/426.1, 455/426.2, 4554561-457, 370/315, 370/316, 370/310, 370/322, 370/328, 375/211
• US Class Current: 455/11.1
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 64/003 locating network equipment
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

Methods and systems are disclosed for improving data transmission rates in a wireless communication system. An example method may be implemented in a wireless communication system including a plurality of base stations defining a plurality of wireless coverage areas in which a mobile station can engage in radio frequency (RF) communication with the base stations where the method includes determining a location of the mobile station. Based on the determined location of the mobile station, the method further includes determining whether activating an inactive signal repeater would increase a rate at which data is able to be communicated from the base stations to the mobile station. In the event that that it is determined that activating the signal repeater would increase the rate at which data is able to be communicated, the method still further includes activating the signal repeater.

Claims

1. In a wireless communication system comprising a plurality of base stations defining a plurality of wireless coverage areas in which a mobile station can engage in radio frequency (RF) communication with the base stations, a method comprising:

determining a location of the mobile station;

based on the determined location of the mobile station, determining whether activating an inactive signal repeater would increase a rate at which data is able to be communicated from the base stations to the mobile station, wherein the inactive signal repeater is disabled from transmitting wireless signals; and

in the event that activating the signal repeater would increase the rate at which data is able to be communicated;

activating the inactive signal repeater.

2. The method of claim 1, wherein activating the signal repeater comprises:

communicating an activation message to the signal repeater from a base station of the plurality of base stations that is serving data communication for the mobile station; and

responsive to the activation message, enabling transceivers of the signal repeater to receive and retransmit RF signals from the base station serving data communication for the mobile station.

3. The method of claim 1, wherein determining the location of the mobile station comprises using a global positioning system to determine the location of the mobile station.

4. The method of claim 1, wherein determining whether activating the inactive signal repeater would increase the rate at which data is able to be communicated comprises:

determining a distance between the mobile station and a first base station of the plurality of base stations, wherein the first base station is currently serving data communication for the mobile station;

determining a distance between the mobile station and a second base station of the plurality;

determining a distance between the mobile station and the repeater; and

determining whether activating the inactive signal repeater would increase the rate at which data is able to be communicated based on the distances of the mobile station to (i) the first base station, (ii) the second base station and (iii) the repeater.

5. The method of claim 4, wherein the distance between the mobile station and the first base station where activating the signal repeater would increase the rate at which data is able be communicated is (i) equal to or greater than one-third of a distance from the first base station to the second base station and (ii) equal to or less than two-thirds of the distance from the first base station to the second base station.

6. The method of claim 1, wherein determining that activating the inactive signal repeater would increase the rate at which data is able to be communicated comprises:

determining a distance between the mobile station and a first base station of the plurality along a path from the first base station toward a second base station of the plurality, wherein the first base station is currently serving data communication for the mobile station; and

determining that the distance between the mobile station and the first base station exceeds a threshold.

7. The method of claim 1, wherein data traffic is communicated from a serving base station of the plurality to the mobile station using time-division multiplexing at substantially full transmission power of the serving base station.

8. The method of claim 1, wherein determining that activating the inactive signal repeater would increase the rate at which data is able to be communicated comprises:

determining a distance between the mobile station and a first base station of the plurality of base stations along a path from the first base station toward a second base station of the plurality, wherein the first base station is currently serving data communication for the mobile station; and

determining that (i) the distance between the mobile station and the first base station exceeds a first threshold and (ii) the distance between the mobile station and the first base station is less than a second threshold,

wherein the signal repeater is located approximately midway between the first base station and the second base station and is responsively activated based on the determination that the distance between the mobile station and the first base station (i) exceeds the first threshold and (ii) is less than the second threshold.

9. The method of claim 8, further comprising:

determining that the mobile station has moved a distance along the path from the first base station toward the second base station that is greater than the second threshold;

responsive to the determination that the mobile station has moved the distance greater than the second threshold;

deactivating the signal repeater; and

handing off a data call associated with the mobile station from the first base station to the second base station.

10. The method of claim 9, wherein the first threshold corresponds with a first distance that is approximately one-third of the distance between the first base station and the second base station and the second threshold corresponds with a second distance that is approximately two-thirds of the distance between the first base station and the second base station.

11. In a wireless communication system comprising a plurality of base stations defining a plurality of wireless coverage areas in which a mobile station can engage in radio frequency (RF) communication with the base stations, a method comprising:

determining a location of the mobile station;

based on the determined location of the mobile station, determining whether deactivating an active signal repeater would increase a rate at which data is able to be communicated from the base stations to the mobile station; and

in the event that deactivating the signal repeater would increase the rate;

deactivating the signal repeater so that the signal repeater is disabled from transmitting wireless signals.

12. The method of claim 11, wherein determining that deactivating the active signal repeater would increase the rate at which data is able to be communicated comprises:

determining that the mobile station is within a threshold distance of a first base station of the plurality, wherein the first base station is currently serving data communication for the mobile station.

13. The method of claim 11, wherein determining that deactivating the active signal repeater would increase the rate at which data is able to be communicated comprises:

determining that the mobile station is greater than a threshold distance from a first base station of the plurality, wherein the first base station is currently serving data communication for the mobile stations, and

responsive to the determination that the mobile station is greater than the threshold distance from the first base station, the method further comprises handing off a data call associated with the mobile station from the first base station to a second base station.

14. The method of claim 11, wherein deactivating the signal repeater comprises:

communicating a deactivation message to the signal repeater from a base station of the plurality of base stations that is serving data communication for the mobile station; and

responsive to the deactivation message, disabling transceivers of the signal repeater that are used to receive and retransmit RF signals from the base station that is serving data communication for the mobile station.

15. The method of claim 11, wherein determining whether deactivating the active signal repeater would increase the rate at which data is able to be communicated comprises:

determining a distance between the mobile station and a first base station of the plurality of base stations, wherein the first base station is currently serving data communication for the mobile station;

determining a distance between the mobile station and a second base station of the plurality;

determining a distance between the mobile station and the repeater;

determining whether deactivating the active signal repeater would increase the rate at which data is able to be communicated based on the distances of the mobile station to (i) the first base station, (ii) the second base station and (iii) the repeater.

16. The method of claim 11, wherein determining that deactivating the active signal repeater would increase the rate at which data is able to be communicated comprises:

determining a distance between the mobile station and a first base station of the plurality along a path from the first base station toward a second base station of the plurality, wherein the first base station is serving data communication for the mobile station and the signal repeater is located approximately midway between the first base station and the second base station along the path; and

determining that (i) the distance between the mobile station and the first base station is less than a first threshold or (ii) the distance between the mobile station and the first base station exceeds a second threshold,

wherein in the event the distance between the mobile station and the first base station exceeds the second threshold, the method further comprises handing off a data call associated with the mobile station from the first base station to the second base station.

17. A wireless communication system for providing communication services to a mobile station, the system comprising:

a first base station and a second base station for providing wireless data communication to the mobile station, the first base station initially serving a data call for the mobile station; and

a signal repeater that is controllable by the first base station, the signal repeater being initially disabled,

wherein the system contains service logic that, when executed, collectively provides for;

determining a location of the mobile station;

based on the determined location of the mobile station, determining whether activating the signal repeater would increase a rate at which data is able to be communicated from the first base station to the mobile station, wherein the inactive signal repeater is disabled from transmitting wireless signals; and

in the event that activating the signal repeater would increase the rate at which data is able to be communicated;

activating the inactive signal repeater.

18. The system of claim 17, wherein the service logic provides for activating the signal repeater by:

communicating an activation message from the first base station to the signal repeater; and

responsive to the activation message, enabling transceivers of the signal repeater to receive and retransmit RF signals from the first base station.

19. The system of claim 17, wherein the service logic provides for determining whether activating the signal repeater would increase the rate at which data is able to be communicated by:

determining a distance between the mobile station and the first base station;

determining a distance between the mobile station and the second base station;

determining a distance between the mobile station and the repeater; and

determining whether activating the signal repeater would increase the rate at which data is able to be communicated based on the distances of the mobile station to (i) the first base station, (ii) the second base station and (iii) the repeater.

20. A wireless communication system for providing communication services to a mobile station, the system comprising:

a mobile station;

a first base station and a second base station for providing wireless data communication to the mobile station, the first base station initially serving a data call for the mobile station; and

a signal repeater that is controllable by the first base station, the signal repeater being initially enabled,

wherein the system contains service logic that, when executed, collectively provides for;

determining a location of the mobile station;

based on the determined location of the mobile station, determining whether deactivating the signal repeater would increase a rate at which data is able to be communicated from the first base station to the mobile station; and

in the event that deactivating the signal repeater would increase the rate;

deactivating the signal repeater so that the signal repeater is disabled from transmitting wireless signals.

21. The system of claim 20, wherein the service logic provides for determining that deactivating the active signal repeater would increase the rate at which data is able to be communicated by:

determining a distance between the mobile station and the first base station along a path from the first base station toward the second base station, wherein the signal repeater is located approximately midway between the first base station and the second base station along the path;

determining that (i) the distance between the mobile station and the first base station is less than a first threshold or (ii) the distance between the mobile station and the first base station exceeds a second threshold,

wherein in the event the distance between the mobile station and the first base station exceeds the second threshold, the method further comprises handing off a data call associated with the mobile station from the first base station to the second base station.