Transmit power control method, device, and wireless controller

Patent metadata

Field	Value
Publication number	US-10244485-B2
Application number	US-201715845869-A
Country	US
Kind code	B2
Filing date	Dec 18, 2017
Priority date	Dec 20, 2016
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

A transmit power control method is disclosed. An example method includes obtaining a path loss between a to-be-adjusted wireless device and each of multiple wireless devices. A transmit power of the to-be-adjusted wireless device is adjusted according to a neighbor path loss and a target power. The neighbor path loss is a function of a neighbor path loss set. The neighbor path loss set is a set of path losses of a neighbor wireless device set. The neighbor wireless device set is a set of at least two wireless devices among the multiple wireless devices, where path losses between the at least two wireless devices and the to-be-adjusted wireless device are lowest. A layer closest to the to-be-adjusted wireless device is used as a reference to adjust the transmit power, and interference between wireless devices is reduced.

First claim

What is claimed is:

1. A transmit power control method, comprising:
obtaining a path loss between a to-be-adjusted wireless device and each of multiple wireless devices; and
adjusting a transmit power of the to-be-adjusted wireless device according to a neighbor path loss and a target power, wherein the transmit power of the to-be-adjusted wireless device is, after attenuating according to the neighbor path loss, the target power;
wherein the neighbor path loss is a function of a neighbor path loss set, and wherein the neighbor path loss set is a set of path losses between the to-be-adjusted wireless device and wireless devices in a neighbor wireless device set; and
wherein the neighbor wireless device set is a set of at least two wireless devices among the multiple wireless devices, wherein path losses between the at least two wireless devices and the to-be-adjusted wireless device are lowest, and wherein a difference between any two closest path losses other than a lowest path loss in the neighbor path loss set is less than or equal to a first threshold.

2. The method according to claim 1 , wherein that the neighbor path loss is a function of a neighbor path loss set comprises:
the neighbor path loss is an average of path losses in the neighbor path loss set.

3. The method according to claim 1 , wherein that the neighbor path loss is a function of a neighbor path loss set comprises:
the neighbor path loss is a median of path losses in the neighbor path loss set.

4. The method according to claim 1 , wherein the method further comprises:
checking, according to an ascending order of path losses of the multiple wireless devices, whether a stop condition is satisfied;
adding a to-be-checked path loss into the neighbor path loss set; and
stopping checking a next path loss when the stop condition is satisfied.

5. The method according to claim 4 , wherein the stop condition comprises:
a condition wherein a quantity of elements in the neighbor path loss set is two or more, and a difference between the to-be-checked path loss and an unchecked lowest path loss is greater than the first threshold.

6. The method according to claim 4 , wherein the stop condition comprises:
a condition wherein a quantity of elements in the neighbor path loss set is equal to a second threshold.

7. A wireless controller, comprising at least one processor and a physical interface, wherein the at least one processor is configured to:
obtain a path loss between a to-be-adjusted wireless device and each of multiple wireless devices;
instruct, using the physical interface, the to-be-adjusted wireless device to adjust a transmit power of the to-be-adjusted wireless device according to a neighbor path loss and a target power, wherein the transmit power of the to-be-adjusted wireless device is, after attenuating according to the neighbor path loss, the target power;
wherein the neighbor path loss is a function of a neighbor path loss set, and wherein the neighbor path loss set is a set of path losses between the to-be-adjusted wireless device and wireless devices in a neighbor wireless device set; and
wherein the neighbor wireless device set is a set of at least two wireless devices among the multiple wireless devices, wherein path losses between the at least two wireless devices and the to-be-adjusted wireless device are lowest, and wherein a difference between any two closest path losses other than a lowest path loss in the neighbor path loss set is less than or equal to a first threshold.

8. The wireless controller according to claim 7 , wherein that the neighbor path loss is a function of a neighbor path loss set comprises:
the neighbor path loss is an average of path losses in the neighbor path loss set.

9. The wireless controller according to claim 7 , wherein that the neighbor path loss is a function of a neighbor path loss set comprises:
the neighbor path loss is a median of path losses in the neighbor path loss set.

10. The wireless controller according to claim 7 , wherein the at least one processor is configured to:
check, according to an ascending order of path losses of the multiple wireless devices, whether a stop condition is satisfied;
add a to-be-checked path loss into the neighbor path loss set; and
stop checking a next path loss when the stop condition is satisfied.

11. The wireless controller according to claim 10 , wherein the stop condition comprises:
a condition wherein a quantity of elements in the neighbor path loss set is two or more, and a difference between the to-be-checked path loss and an unchecked lowest path loss is greater than the first threshold.

12. The wireless controller according to claim 10 , wherein the stop condition comprises:
a condition wherein a quantity of elements in the neighbor path loss set is equal to a second threshold.

13. A wireless device, comprising at least one processor and a wireless physical interface, wherein the at least one processor is configured to:
measure, using the wireless physical interface, strengths of signals from multiple wireless devices to obtain a path loss between the wireless device and each of the multiple wireless devices; and
adjust a transmit power of the wireless device according to a neighbor path loss and a target power, wherein the transmit power of the wireless device is, after attenuating according to the neighbor path loss, the target power;
wherein the neighbor path loss is a function of a neighbor path loss set, and wherein the neighbor path loss set is a set of path losses between the wireless device and wireless devices in a neighbor wireless device set; and
wherein the neighbor wireless device set is a set of at least two wireless devices among the multiple wireless devices, wherein path losses between the at least two wireless devices and the wireless device are lowest, and wherein a difference between any two closest path losses other than a lowest path loss in the neighbor path loss set is less than or equal to a first threshold.

14. The wireless device according to claim 13 , wherein that the neighbor path loss is a function of a neighbor path loss set comprises:
the neighbor path loss is an average of path losses in the neighbor path loss set.

15. The wireless device according to claim 13 , wherein that the neighbor path loss is a function of a neighbor path loss set comprises:
the neighbor path loss is a median of path losses in the neighbor path loss set.

16. The wireless device according to claim 13 , wherein the at least one processor is configured to:
check, according to ascending order of path losses of the multiple wireless devices, whether a stop condition is satisfied;
add a to-be-checked path loss into the neighbor path loss set; and
stop checking a next path loss when the stop condition is satisfied.

17. The wireless device according to claim 16 , wherein the stop condition comprises:
a condition wherein a quantity of elements in the neighbor path loss set is two or more, and a difference between the to-be-checked path loss and an unchecked lowest path loss is greater than the first threshold.

18. The wireless device according to claim 16 , wherein the stop condition comprises:
a condition wherein a quantity of elements in the neighbor path loss set is equal to a second threshold.

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Wei
• Zhen Peng
• Jiang Xingfeng

Classifications

• H04B17/347

  Path loss · CPC title

• H04B17/318

  Received signal strength · CPC title

• H04W52/327

  Power control of multicast channels · CPC title

• H04W52/12

  Outer and inner loops · CPC title

• H04W52/242 Primary

  taking into account path loss · CPC title