US 11,751,274 B2
Method for managing a communication channel
Florent Raby, Rueil Malmaison (FR)
Assigned to SAGEMCOM BROADBAND SAS, Rueil-Malmaison (FR)
Appl. No. 16/973,300
Filed by SAGEMCOM BROADBAND SAS, Rueil Malmaison (FR)
PCT Filed Jun. 18, 2019, PCT No. PCT/EP2019/065946
§ 371(c)(1), (2) Date Dec. 8, 2020,
PCT Pub. No. WO2020/002037, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 1855710 (FR), filed on Jun. 26, 2018.
Prior Publication US 2021/0251035 A1, Aug. 12, 2021
Int. Cl. H04W 76/19 (2018.01); H04W 76/23 (2018.01); H04W 76/14 (2018.01); H04L 5/06 (2006.01); H04W 88/04 (2009.01); H04W 84/12 (2009.01)
CPC H04W 76/23 (2018.02) [H04L 5/06 (2013.01); H04W 76/14 (2018.02); H04W 76/19 (2018.02); H04W 88/04 (2013.01); H04W 84/12 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for managing a communication channel used by a plurality of Wi-Fi devices of a Wi-Fi network of the backhaul type in order to implement a backhaul network in said Wi-Fi network, wherein the method is executed by a first Wi-Fi device in the plurality and comprises:
a) detecting that a second Wi-Fi device in the plurality connected directly to the first Wi-Fi device has disconnected from an initial channel of an initial sub-band by detecting that no Wi-Fi connection maintenance frame has been received, on the initial channel, coming from the second Wi-Fi device, during a predefined period, the initial channel being used by the plurality of Wi-Fi devices for implementing the backhaul network;
b) following this detection, listening on each communication channel of a predefined sub-band, referred to as a backup sub-band, to which the second Wi-Fi device is able to migrate in order to implement the backhaul network in the event of detection, by the second Wi-Fi device, of a radar signal on the initial channel, the initial and backup sub-band being different;
in the event of reception on a channel of the backup sub-band, referred to as a backup channel, by the first Wi-Fi device of a frame containing an identifier of the second device:
causing the first Wi-Fi device to migrate to the backup channel;
verifying whether the second Wi-Fi device has reconnected to the initial channel;
in the case where the second Wi-Fi device has reconnected to the initial channel, causing the first Wi-Fi device to connect the second Wi-Fi device on the backup channel;
otherwise, waiting during a predefined period and repeating said verifying; and
otherwise, remaining on the initial channel in the case where the first Wi-Fi device determines that the second Wi-Fi device has reconnected to the initial channel, and, otherwise, repeating b).