Method and system for controlling the transmission power of at least one node in a wireless network

• US 20060268787A1
• Filed: 05/24/2005
• Published: 11/30/2006
• Est. Priority Date: 05/24/2005
• Status: Abandoned Application

• Current Assignee: MeshNetworks, Inc. (Motorola Solutions, Inc.)
• Original Assignee: MeshNetworks, Inc. (Motorola Solutions, Inc.)
• Inventors: Ramachandran, Shyamal, Strutt, Guenael T.
• Application Number:
  US11/138,241
• Publication Number:
  US 20060268787A1
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]
• CPC Class Codes: H04W 52/46 in multi hop networks, e.g. wireless relay networks

Abstract

A method for controlling packet transmission power by a node in a wireless communication network, the method comprising: determining respective values for a number of sample data rates collected; determining a target data rate, wherein the target data rate is a weighted average of the respective values; and adjusting packet transmission power based on a result of a comparison of an average data rate in current traffic and channel conditions to the target data rate.

Claims

1. A method for controlling packet transmission power by a node in a wireless communication network, the method comprising:

determining respective values for a number of sample data rates collected;

determining a target data rate, wherein the target data rate is a weighted average of the respective values; and

adjusting packet transmission power based on a result of a comparison of an average data rate to the target data rate.

2. The method of claim 1, further comprising decreasing packet transmission power if the weighted average is substantially equal to the target data rate.

3. The method of claim 1, further comprising increasing packet transmission power if the average data rate is lower than the target data rate.

4. The method of claim 1, further comprising increasing packet transmission power if the average data rate is higher than the target data rate, and adjusting the target data rate.

5. The method of claim 1, wherein the comparison of the average data rate and the target data rate comprises comparing a transition counter value to maximum and minimum transition counter threshold values.

6. The method of claim 5, wherein the average data rate is determined to be substantially equal to the target data rate when a predetermined number of samples has been collected, before the transition counter value becomes lower than the minimum transition counter threshold value or higher than the maximum transition counter threshold value.

7. The method of claim 5, wherein the average data rate is determined to be lower than the target data rate when the transition counter value is lower than the minimum transition counter threshold value.

8. The method of claim 5, wherein the average data rate is determined to be higher than the target data rate when the transition counter value is higher than the minimum transition counter threshold value.

9. The method of claim 5, wherein the transition counter is determined by the sum of the normalized data rate discrepancies between the sample data rates and the target data rate.

10. The method of claim 5, wherein the maximum and minimum transition counter threshold values are the product of a predetermined number of sample data rates and a data rate variation tolerance value.

11. A node, adapted for use in a wireless communication network, and which is adapted to control its packet transmission power, the node comprising:

a controller, adapted to determine the respective values for a number of sample data rates collected, determine a target data rate, wherein the target data rate is a weighted average of the respective values, and adjust packet transmission power based on a result of a comparison of an average data rate to the target data rate.

12. The node of claim 11, wherein the node is further capable of decreasing packet transmission power if the weighted average is substantially equal to the target data rate.

13. The node of claim 11, wherein the node is further capable of increasing packet transmission power if the average data rate is lower than the target data rate.

14. The node of claim 11, wherein the node is further capable of increasing packet transmission power if the average data rate is higher than the target data rate, and adjusting the target data rate.

15. The node of claim 11, wherein the comparison of the average data rate and the target data rate comprises comparing a transition counter value to maximum and minimum transition counter threshold values.

16. The method of claim 15, wherein the average data rate is determined to be substantially equal to the target data rate when a predetermined number of samples has been collected, before the transition counter value becomes lower than the minimum transition counter threshold value or higher than the maximum transition counter threshold value.

17. The node of claim 15, wherein the average data rate is determined to be lower than the target data rate when the transition counter value is lower than the minimum transition counter threshold value.

18. The node of claim 15, wherein the average data rate is determined to be higher than the target data rate when the transition counter value is higher than the minimum transition counter threshold value.

19. The node of claim 15, wherein the transition counter is determined by the sum of the normalized data rate discrepancies between the sample data rates and the target data rate.

20. The node of claim 15, wherein the maximum and minimum transition counter threshold values are the product of a predetermined number of sample data rates and a data rate variation tolerance value.