Transmit power control design for make-before-break roaming deployments

Patent metadata

Field	Value
Publication number	US-12550080-B2
Application number	US-202318177041-A
Country	US
Kind code	B2
Filing date	Mar 1, 2023
Priority date	Mar 1, 2023
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

Systems and techniques for performing transmit power control for facilitating multi-band make-before-break (MBB) roaming are described. An example technique includes identifying a first access point communicating on a first band within a first cell. A second access point communicating on a second band within a second cell neighboring the first cell is identified. A target overlap between the first band and the second band is created.

First claim

We claim:

1 . A computer-implemented method comprising:
identifying a first access point communicating on a first band within a first cell; identifying a second access point communicating on a second band within a second cell neighboring the first cell; and creating a target overlap between the first band and the second band, wherein creating the target overlap comprises adjusting a size of the first cell based at least in part on (i) a first transmission power determined for the first access point based on a transmit power control performed for the first band and (ii) at least one predicted second transmission power for the second access point that will meet the target overlap between the first band and the second band.

2 . The computer-implemented method of claim 1 , wherein adjusting the size of the first cell comprises assigning a maximum of the first transmission power and the at least one predicted second transmission power to the first access point.

3 . The computer-implemented method of claim 1 , wherein the at least one predicted second transmission power comprises a respective predicted second transmission power that will meet the target overlap for each radio of the second access point.

4 . The computer-implemented method of claim 1 , wherein creating the target overlap further comprises adjusting a size of the second cell.

5 . The computer-implemented method of claim 3 , wherein adjusting the size of the second cell comprises:
determining a first transmission power for the second access point, based on performing transmit power control for the second band; predicting a second transmission power for the first access point that will meet the target overlap between the first band and the second band; and assigning a maximum of the first transmission power for the second access point and the second transmission power for the first access point to the second access point.

6 . The computer-implemented method of claim 1 , wherein creating the target overlap comprises adjusting the size of the first cell and a size of the second cell at a same time.

7 . The computer-implemented method of claim 1 , wherein creating the target overlap further comprises:
performing channel assignment for the first band in the first cell, based at least in part on an operating mode of the second access point; after performing the channel assignment, performing transmit power control for the first access point communicating on the first band in the first cell; and performing transmit power control for the second access point communicating on the second band in the second cell, based in part on the transmit power control for the first access point.

8 . The computer-implemented method of claim 7 , wherein performing the channel assignment comprises:
determining a signal strength of the second access point when the operating mode of the second access point is low power indoor (LPI) mode; and selecting one or more channels in the first band, based in part on the signal strength.

9 . The computer-implemented method of claim 7 , wherein performing the transmit power control for the first access point comprises:
determining an in-band transmission power for the first access point; predicting a transmission power of the second access point that, when combined with the in-band transmission power, will achieve the target overlap between the first band and the second band; and saving the predicted transmission power.

10 . The computer-implemented method of claim 9 , wherein performing the transmit power control for the second access point comprises:
determining an in-band transmission power for the second access point; and assigning a higher of the in-band transmission power for the second access point and the predicted transmission power of the second access point to the second access point.

11 . The computer-implemented method of claim 1 , wherein the target overlap is based on a type of client device being served by at least one of the first access point or the second access point.

12 . The computer-implemented method of claim 11 , wherein the type of client device is one of a plurality of client types comprising a single radio multi-link device, a simultaneous transmission and reception (STR) multi-link device, and a non-STR multi-link device.

13 . A system comprising:
a memory; and a processor communicatively coupled to the memory, the processor being configured to perform an operation comprising: identifying a first access point communicating on a first band within a first cell; identifying a second access point communicating on a second band within a second cell neighboring the first cell; and creating a target overlap between the first band and the second band, wherein creating the target overlap comprises adjusting a size of the first cell based at least in part on (i) a first transmission power determined for the first access point based on a transmit power control performed for the first band and (ii) at least one predicted second transmission power for the second access point that will meet the target overlap between the first band and the second band.

14 . The system of claim 13 , wherein adjusting the size of the first cell comprises assigning a maximum of the first transmission power and the at least one predicted second transmission power to the first access point.

15 . The system of claim 13 , wherein creating the target overlap further comprises:
performing channel assignment for the first band in the first cell, based at least in part on an operating mode of the second access point; after performing the channel assignment, performing transmit power control for the first access point communicating on the first band in the first cell; and performing transmit power control for the second access point communicating on the second band in the second cell, based in part on the transmit power control for the first access point.

16 . The system of claim 15 , wherein performing the channel assignment comprises:
determining a signal strength of the second access point when the operating mode of the second access point is low power indoor (LPI) mode; and selecting one or more channels in the first band, based in part on the signal strength.

17 . The system of claim 16 , wherein:
performing the transmit power control for the first access point comprises:
determining an in-band transmission power for the first access point;
predicting a transmission power of the second access point that, when combined with the in-band transmission power, will achieve the target overlap between the first band and the second band; and
saving the predicted transmission power; and
performing the transmit power control for the second access point comprises:
determining an in-band transmission power for the second access point; and
assigning a higher of the in-band transmission power for the second access point and the predicted transmission power of the second access point to the second access point.

18 . A non-transitory computer-readable storage medium comprising computer executable code, which when executed by one or more processors, performs an operation comprising:
identifying a first access point communicating on a first band within a first cell; identifying a second access point communicating on a second band within a second cell neighboring the first cell; and creating a target overlap between the first band and the second band, wherein creating the target overlap comprises adjusting a size of the first cel

Assignees

• Cisco Tech Inc

Inventors

• Monajemi Pooya
• Desai Vishal S
• Smith Malcolm M

Classifications

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title

• H04W16/24 Primary

  Cell structures · CPC title

• H04W72/54

  based on quality criteria · CPC title

• H04W52/223

  predicting future states of the transmission · CPC title

• H04W52/38 Primary

  TPC being performed in particular situations · CPC title