Optimization of full-power broadcast beamforming

• US 10,135,509 B1
• Filed: 08/23/2016
• Issued: 11/20/2018
• Est. Priority Date: 08/23/2016
• Status: Active Grant

• Current Assignee: T-Mobile Innovations LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Marupaduga, Sreekar, Wurtenberger, Andrew Mark, Narendran, Rajveen, Dreiling, Ryan Patrick
• Primary Examiner(s): Zhao, Wei
• Application Number:
  US15/244,842
• Time in Patent Office: 819 Days
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04H 20/38 Arrangements for distribution where lower stations, e.g. receivers, interact with the broadcast
• CPC Class Codes: H04H 60/51 of receiving stations
• CPC Class Codes: H04L 47/29 using a combination of thresholds
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/0205 at the air interface dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/0226 based on location or mobility handoff or reselection H04W36/00; mobile application services making use of the location of users or terminals H04W4/02
• CPC Class Codes: H04W 4/025 using location based information parameters
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 52/322 Power control of broadcast channels
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

Systems, methods, and computer-readable media for dynamically optimizing the use of full-power broadcast beamforming within a wireless communication network are provided herein. Though full-power broadcast beamforming may result in increased interference and decrease throughput, the increased coverage area provided by full-power broadcast beamforming is favored under certain conditions, including the locations of user devices within a network cell. Accordingly, location data may be received from user devices within a network cell utilizing a plurality of beams, and the locations of each of the user devices may be used to determine whether to enable full-power broadcast beamforming where each beam within plurality of beams is at a maximum signal strength. Upon determining to enable full-power broadcast beamforming, a signal weight for one or more of the beams may be adjusted to full power.

Claims

1. One or more non-transitory computer-readable storage media having computer-executable instructions embodied thereon that, when executed, perform a method for optimizing full-power broadcast beamforming within a network cell, the method comprising:

at a base station having a plurality of beams, receiving location data from a first set of user devices comprising one or more user devices within the network cell, wherein the location data indicates a location of each user device within the first set of user devices;

based on the location data, determining whether to enable full-power broadcast beamforming where a signal for each beam within the plurality of beams is at maximum signal strength; and

upon determining to enable full-power broadcast beamforming, adjusting a signal weight for one or more beams within the plurality of beams to full power, the adjusting causes an increase in a geographic coverage area of the network cell for at least one of the first set of user devices.

2. The media of claim 1, wherein the location of each user device within the first set of user devices comprises one of cell center, cell middle, and cell edge, wherein:

cell center comprises a region within the network cell adjacent to the base station,

cell middle comprises a region within the network cell between cell center and cell edge, and

cell edge comprises a region forming a periphery of the network cell.

3. The media of claim 2, wherein determining whether to enable full-power broadcast beamforming comprises determining a number of user devices within cell edge exceeds a threshold number of cell edge user devices.

4. The media of claim 2, wherein determining whether to enable full-power broadcast beamforming comprises:

determining a ratio of a number of user devices within cell edge to a number of user devices within cell center and cell middle; and

determining the ratio exceeds a threshold ratio.

5. The media of claim 1, wherein the method further comprises receiving throughput data from the first set of user devices and wherein determining whether to enable full-power broadcast beamforming is further based on the throughput data.

6. The media of claim 5, wherein determining whether to enable full-power broadcast beamforming based on the throughput data comprises determining a throughput value exceeds a throughput threshold.

7. The media of claim 6, wherein the throughput value comprises one of an average throughput for the first set of user devices or a throughput for a sector within the network cell.

8. The media of claim 2, further comprising:

when full-power broadcast beamforming is enabled, receiving additional location data from a second set of user devices within the network cell, the additional data indicating a location of each user device within the second set of user devices;

determining whether to disable full-power broadcast beamforming based on the additional location data; and

upon determining whether to disable full-power broadcast beamforming, adjusting the signal weight for one or more beams within the plurality of beams to less than the maximum signal strength.

9. The media of claim 8, wherein determining whether to disable full-power broadcast beamforming comprises determining a number of user devices within cell edge does not exceed a threshold number of cell edge user devices.

10. A method for optimizing full-power broadcast beamforming at a base station within a network cell, the method comprising:

at a base station having a plurality of beams, receiving location data from a first set of user devices comprising one or more user devices within the network cell, wherein the location data indicates a location of each user device within the first set of user devices, the location for each user device being one of cell center, cell middle, and cell edge, wherein;

cell center comprises a region within the network cell adjacent to the base station,

cell middle comprises a region within the network cell between cell center and cell edge, and

cell edge comprises a region forming a periphery of the network cell;

based on the location of each user device within the first set of user devices, determining whether to enable full-power broadcast beamforming where a signal for each beam within the plurality of beams is at maximum signal strength; and

upon determining to enable full-power broadcast beamforming, adjusting a signal weight for one or more beams within the plurality of beams to full power, the adjusting causes an increase in a geographic coverage area of the network cell for at least one of the first set of user devices.

11. The method of claim 10, wherein cell center, cell middle, and cell edge are each defined by a distance from the base station and an outer boundary, wherein the distance between the base station and an outer boundary of cell center is less than the distance between the base station and an outer boundary of cell middle, which is less than the distance between the base station and an outer boundary of cell edge.

12. The method of claim 11, wherein the distance defining each of cell center, cell middle, and cell edge is based on at least one of radio frequency conditions and a type of geographical environment within the network cell.

13. The method of claim 10, wherein determining whether to enable full-power broadcast beamforming comprises:

determining a ratio of a number of user devices within cell edge to a number of user devices within cell center and cell middle; and

determining the ratio exceeds a threshold ratio.

14. The method of claim 10 further comprising:

when full-power broadcast beamforming is enabled, receiving additional location data from a second set of user devices comprising one or more user devices within the network cell, the additional location data indicating a location of each user device within the second set of user devices;

determining whether to disable full-power broadcast beamforming based on the location of each user device within the second set of user devices; and

upon determining to disable full-power broadcast beamforming, adjusting the signal weight for one or more beams within the plurality of beams to less than maximum signal strength.

15. A system for optimizing full-power broadcast beamforming at a base station within a network cell, the system comprising:

one or more processors associated with a base station having a plurality of beams; and

one or more computer storage media storing computer-executable instructions that, when executed by the one or more processors, implement a method comprising;

receiving location data from a first set of user devices comprising one or more user devices within the network cell, wherein the location data indicates a location of each user device within the first set of user devices;

based on the location of each user device, determining whether to enable full-power broadcast beamforming where a signal for each beam within the plurality of beams is at maximum signal strength; and

upon determining to enable full-power broadcast beamforming, adjusting a signal weight for one or more beams within the plurality of beams to full power, the adjusting causes an increase in a geographic coverage area of the network cell for at least one of the first set of user devices.

16. The system of claim 15, wherein the location of each user device comprises one of cell center, cell middle, and cell edge, wherein:

cell center comprises a region within the network cell adjacent to the base station,

cell middle comprises a region within the network cell between cell center and cell edge, and

cell edge comprises a region forming a periphery of the network cell.

17. The system of claim 16, wherein determining whether to enable full-power broadcast beamforming comprises:

determining a ratio of a number of user devices within cell edge to a number of user devices within cell center and cell middle; and

determining the ratio exceeds a threshold ratio.

18. The system of claim 16, wherein determining whether to enable full-power broadcast beamforming is further based on a total number of user devices within the network cell, wherein full-power broadcast beamforming is enabled when the total number of user devices does not exceed a threshold number of user devices.

19. The system of claim 15, wherein the method further comprises:

when full-power broadcast beamforming is enabled, receiving additional location data from a second set of user devices comprising one or more user devices within the network cell, the additional data indicating a location of each user devices within the second set of user devices;

determining whether to enable tapered beamforming based on the additional location data; and

upon determining to enable tapered beamforming, adjusting the signal weight for one or more beams within the plurality of beams to less than the maximum signal strength.

20. The system of claim 19, wherein when tapered beamforming is enabled, one or more beams within the plurality of beams utilize different signal weights.