METHOD FOR OPTIMIZING UPLINK POWER-CONTROL PARAMETERS IN LTE

• US 20130310102A1
• Filed: 05/18/2012
• Published: 11/21/2013
• Est. Priority Date: 05/18/2012
• Status: Active Grant

• Current Assignee: Honor Device Company Limited
• Original Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Inventors: Nikopour, Hosein, Ma, Jianglei, Chao, Zhijun
• Granted Patent: US 8,977,313 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/38 TPC being performed in particular situations

Abstract

One embodiment of the present invention provides a system for setting uplink power-control parameters for a cell within a wireless network. During operation, the system receives parameters associated with uplink power for a plurality of user devices within the cell over a predetermined time interval, and averages the received parameters over the user devices and the predetermined time interval to obtain an averaged parameter. The system then determines a set of power-control parameters for the cell based on the averaged parameter, and sends the set of power-control parameters to the user devices to allow the user devices to control transmission power using the set of power-control parameters.

Claims

1. A computing system for setting uplink power-control parameters for a cell within a wireless network, the system comprising:

a power-metric determination mechanism configured to determine a power metric for the cell;

a cell-type determination mechanism configured to determine a type for the cell based on the power metric; and

a power-control-parameter determination mechanism configured to determine a set of power-control parameters for the cell based on the cell type.

2. The computing system of claim 1, wherein the wireless network is a Long Term Evolution (LTE) network.

3. The computing system of claim 1, wherein the power-metric is determined based on an uplink path-loss parameter.

4. The computing system of claim 3, wherein the uplink path-loss parameter includes a loss-to-serving-cell portion indicating path-loss between a user device and a base station located in the cell and a loss-to-neighbors portion indicating path-loss between a user device and base stations located at neighboring cells.

5. The computing system of claim 1, wherein the power metric is determined based on an average uplink path-loss parameter calculated over a plurality of user devices, over a pre-determined time interval.

6. The computing system of claim 5, wherein the power metric is determined based on an average path loss to a base station in the cell and an average path loss to a base station in a neighboring cell.

7. The computing system of claim 5, wherein the predetermined time interval is a number of hours, days, or weeks.

8. The computing system of claim 1, further comprising a lookup table indicating mapping between a cell type and a set of power-control parameters.

9. A non-transitory computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method for setting uplink power-control parameters for a cell within a wireless network, the method comprising:

determining a power metric for the cell;

determining a type for the cell based on the power metric; and

transmitting a set of power-control parameters for the cell based on the cell type.

10. The computer-readable storage medium of claim 9, wherein the wireless network is a Long Term Evolution (LTE) network.

11. The computer-readable storage medium of claim 9, wherein the power-metric is determined based on an uplink path-loss parameter.

12. The computer-readable storage medium of claim 11, wherein the uplink path-loss parameter includes a loss-to-serving-cell portion indicating path-loss between the user device and the base station and a loss-to-neighbors portion indicating path-loss between the user device and base stations located at neighboring cells.

13. The computer-readable storage medium of claim 9, wherein the power metric is determined based on an average uplink path-loss parameter calculated over a plurality of user devices, over a pre-determined time interval.

14. The computer-readable storage medium of claim 13, wherein the power metric is determined based on an average path loss to a base station in the cell and an average path loss to a base station in a neighboring cell.

15. The computer-readable storage medium of claim 13, wherein the predetermined time interval is a number of hours, days, or weeks.

16. The computer-readable storage medium of claim 9, wherein the method further comprises looking up a lookup table indicating mapping between a cell type and a set of power-control parameters.

17. A computer-executable method for setting uplink power-control parameters for a cell within a wireless network, the method comprising:

determining a power metric for the cell;

determining a type for the cell based on the power metric; and

transmitting a set of power-control parameters for the cell based on the cell type.

18. The method of claim 17, wherein the wireless network is a Long Term Evolution (LTE) network.

19. The method of claim 17, wherein the power-metric is determined based on an uplink path-loss parameter.

20. The method of claim 19, wherein the uplink path-loss parameter includes a loss-to-serving-cell portion indicating path-loss between the user device and the base station and a loss-to-neighbors portion indicating path-loss between the user device and base stations located at neighboring cells.

21. The method of claim 17, wherein the power metric is determined based on an average uplink path-loss parameter calculated over a plurality of user devices, over a pre-determined time interval.

22. The method of claim 21, wherein the power metric is determined based on an average path loss to a base station in the cell and an average path loss to a base station in a neighboring cell.

23. The method of claim 21, wherein the predetermined time interval is a number of hours, days, or weeks.

24. The method of claim 17, further comprising looking up a lookup table indicating mapping between a cell type and a set of power-control parameters.