IP Library Granted Patent US 9,549,328
Granted Patent B2
US 9,549,328 · App. 14/250,730 · Granted Jan 17, 2017

Method to optimize the communication parameters between an access point and at least one client device

Inventors: Julien Herzen (Mezieres, CH); Ruben Merz (Berlin, DE); Patrick Thiran (Belmont-Lausanne, CH)
Assignee: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)
H04W24/02H04W36/30H04W36/06
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Quick Facts
Patent No.
US 9,549,328
App. No.
14/250,730
Granted
Jan 17, 2017
Kind
B2
Abstract

A method to optimize the communication on a channel between an access point and at least one client device, said channel being characterized by a center frequency and a bandwidth, comprises: establishing a connection on a first channel according to a first center frequency and a first bandwidth; exchanging data through this first channel between the access point and the client device; monitoring a first interference level on the first channel; the access point, while the data are exchanged, executes: informing the client device to switch to a second channel having a different center frequency and/or a different bandwidth; determining a second interference level on the second channel; comparing the first interference level with the second interference level; deciding to switch back or keep the second channel based on the comparison.

Claims (40)

1. A method to optimize communications on a channel between an access point and a plurality of client devices, said channel being characterized by a center frequency and a bandwidth, said method comprising:

establishing by the access point a connection with the client devices on a first channel having a first center frequency and a first bandwidth;

exchanging by the access point data through the first channel with the client devices;

monitoring by the access point a first interference level on the first channel;

reviewing compatibility levels to the access point from the client devices, a compatibility level for a client device defining whether the client device is able to dynamically switch from the first channel to another second channel having a different center frequency and if the client device will change channels in response to an instruction from the access point;

instructing the client devices to switch to a second channel having a different center frequency and/or a different bandwidth only if all compatibility levels for all client devices indicate that all client devices are able to dynamically switch from the first channel to the second channel;

determining by the access point a second interference level on the second channel;

comparing by the access point the first interference level with the second interference level; and

deciding by the access point whether to switch back to the first channel based on the comparison.

2. The method of claim 1 , wherein the second center frequency is different than the first center frequency, and the second bandwidth is the same as the first bandwidth.

3. The method of claim 1 , wherein the second center frequency is the same as the first center frequency, and the second bandwidth is different than the first bandwidth.

4. The method of claim 1 , wherein the second center frequency is different than the first center frequency, and the second bandwidth is different than the first bandwidth.

5. The method according to claim 1 , further comprising obtaining a compatibility level from each of the client devices.

6. A method to optimize communications on a channel between an access point and a plurality of client devices, said channel being characterized by a center frequency and a bandwidth, said method comprising:

establishing by the access point a connection to the client devices on a first channel having to a first center frequency and a first bandwidth;

exchanging by the access point data with the client devices through the first channel;

monitoring by the access point a first interference level on the first channel;

reviewing compatibility levels to the access point from the client devices, a compatibility level for a client device defining whether the client device is able to dynamically switch from the first channel to another second channel having a different center frequency and if the client device will change channels in response to an instruction from the access point;

temporarily switching by the access point to a second channel having a different center frequency and/or a different bandwidth only if all compatibility levels for all client devices indicate that all client devices are able to dynamically switch from the first channel to the second channel;

determining by the access point a second interference level on the second channel;

comparing the first interference level with the second interference level; and

if the second interference level is lower than the first interference level, informing the client devices to switch to the second channel and switching the communication to the second channel.

7. The method of claim 6 , wherein the second center frequency is different than the first center frequency, and the second bandwidth is the same as the first bandwidth.

8. The method of claim 6 , wherein the second center frequency is the same as the first center frequency, and the second bandwidth is different than the first bandwidth.

9. The method of claim 6 , wherein the second center frequency is different than the first center frequency, and the second bandwidth is different than the first bandwidth.

10. The method according to claim 6 , further comprising obtaining a compatibility level from each of the client devices.

11. An access point comprising:

a processor;

a wireless transceiver connected to the processor;

wherein the processor is configured to

establish via the transceiver communications with at least one client device on a first channel, said channel being characterized by a first center frequency and a first bandwidth;

exchange data with the at least one client device via the transceiver through the first channel;

monitor a first interference level on the first channel;

review a compatibility level to the access point from the at least one client device, a compatibility level for a client device defining whether the client device is able to dynamically switch from the first channel to another second channel having a different center frequency and if the client device will change channels in response to an instruction from the access point;

instruct the transceiver to change from the first channel to a second channel having a different center frequency and/or a different bandwidth;

determine a second interference level according to the second channel;

compare the first interference level with the second interference level;

if the second interference level is lower than the first interference level and if the compatibility level for the at least one client device indicates that the at least one client device is able to dynamically switch from the first channel to the second channel, instruct the at least one client device to change from the first channel to the second channel and instruct the transceiver to change from the first channel to the second channel.

12. The access point of claim 11 , wherein the processor is configured to select the second channel with a different center frequency than the first center frequency, the second bandwidth being the same as the first bandwidth.

13. The access point of claim 11 , wherein the processor is configured to select the second channel with a different bandwidth than the first bandwidth, the second center frequency being the same as the first center frequency.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 4, 2026
From: RP INTELLECTUAL PARTNERS LLC
To: ARC LINK LLC
Reel/Frame 074845/0439 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 15, 2024
From: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)
To: IP3 2023, SERIES 923 OF ALLIED SECURITY TRUST I
Reel/Frame 066121/0013 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 18, 2014
From: HERZEN, JULIEN; MERZ, RUBEN; THIRAN, PATRICK
To: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)
Reel/Frame 033343/0764 →
Continuity (2)
Provisional Application 61810790 · Apr 11, 2013
Related Publication 20140307571A1 · Oct 16, 2014