Method and apparatus for managing channel in WLAN system

Patent metadata

Field	Value
Publication number	US-11096151-B2
Application number	US-201816006127-A
Country	US
Kind code	B2
Filing date	Jun 12, 2018
Priority date	Jun 12, 2017
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

Embodiments of the disclosure relate to a fifth generation (5G) or pre-5G communication system for supporting a higher data transmission rate beyond the fourth generation (4G) communication system, such as long term evolution (LTE) are provided. The method for managing a channel in a wireless local area network (WLAN) system includes detecting a radar signal and determining an optimal channel based on history information of a channel and the detected radar signal.

First claim

What is claimed is:

1. A method for managing a channel on an access point (AP) in a wireless local area network (WLAN) system, the method comprising:
receiving advertisement information informing a presence of a channel monitor responsible for managing the AP and detecting a radar signal, the advertisement information including information related to access to the channel monitor;
identifying whether the channel monitor is accessible based on the advertisement information;
in case that the channel monitor is accessible:
send a request for channel information to the channel monitor,
receive the channel information indicating a channel switch of the AP,
select one from a first channel in a non-dynamic frequency selection (non-DFS) band and a second channel that is available in a DFS band based on the channel information, and
transmit information on the selected channel to the channel monitor; and

in case that the channel monitor is not accessible:
select the first channel available for communicating with a client device in a non-DFS band,

wherein the channel information includes information of available second channel in the DFS band and channel availability check time information for channels that are currently unavailable in the DFS band, and priority information for each of the at least one second channel, and
wherein the DFS band is a WLAN band available for transmission of the radar signal and the non-DFS band is a WLAN band not overlapping with the DFS band.

2. The method of claim 1 , wherein the channel information is determined based on ambient channel information.

3. The method of claim 2 , wherein the ambient channel information includes a channel number.

4. The method of claim 1 , wherein the channel information is determined based on a DFS channel having the radar signal and another DFS channel lacking the radar signal.

5. A method for managing a channel on a channel monitor in a wireless local area network (WLAN) system, the method comprising:
transmitting advertisement information informing a presence of a channel monitor responsible for managing an access point (AP) and detecting a radar signal, the advertisement information including information related to access to the channel monitor;
receiving a request for channel information from the AP;
transmitting the channel information indicating a channel switch of the AP to the AP; and
receiving, from the AP, information on a selected channel based on the channel information, the selected channel being one from a first channel in a non-dynamic frequency selection (non-DFS) band and a second channel in a DFS band,
wherein the first channel is a channel available in the non-DFS band, and the second channel is a channel available in the DFS band,
wherein the channel information includes information of available second channel in the DFS band and channel availability check time information for channels that are currently unavailable in the DFS band, and priority information for each of the at least one second channel, and
wherein the DFS band is a WLAN band available for transmission of the radar signal and the non-DFS band is a WLAN band not overlapping with the DFS band.

6. The method of claim 5 , wherein the channel information is determined based on ambient channel information.

7. The method of claim 6 , wherein the ambient channel information includes a channel number.

8. The method of claim 5 , wherein the channel information is determined based on a DFS channel having the radar signal and another DFS channel lacking the radar signal.

9. An apparatus for managing a channel on an access point (AP) in a wireless local area network (WLAN) system, the apparatus comprising:
a transceiver configured to transmit or receiver data; and
at least one processor configured to:
receive, through the transceiver, advertisement information informing a presence of a channel monitor responsible for managing the AP and detecting a radar signal, the advertisement information including information related to access to the channel monitor;
identify whether the channel monitor is accessible based on the advertisement information; and
in case that the channel monitor is accessible:
send a request for channel information to the channel monitor,
receive the channel information indicating a channel switch of the AP,
select one from a first channel in a non-dynamic frequency selection (non-DFS) band and a second channel that is available in a DFS band, based on the channel information, and
transmit, through the transceiver, information on the selected channel to the channel monitor, and

in case that the channel monitor is not accessible:
select a first channel available for communicating with a client device in a non-DFS band,

wherein the channel information includes information of available second channel in the DFS band and channel availability check time information for channels that are currently unavailable in the DFS band, and priority information for each of the at least one second channel, and
wherein the DFS band is a WLAN band available for transmission of the radar signal and the non-DFS band is a WLAN band not overlapping with the DFS band.

10. The apparatus of claim 9 ,
wherein the channel information is determined based on ambient channel information, and
wherein the ambient channel information includes a channel number.

11. The apparatus of claim 9 ,
wherein the channel information is determined based on a DFS channel having the radar signal and another DFS channel lacking the radar signal.

12. An apparatus for managing a channel on a channel monitor in a wireless local area network (WLAN) system, the apparatus comprising:
a transceiver configured to transmit or receiver data; and
at least one processor configured to:
transmit, through the transceiver, advertisement information informing a presence of a channel monitor responsible for managing an access point (AP) and detect a radar signal, the advertisement information including information related to access to the channel monitor,
receive a request for channel information from the AP,
transmit, through the transceiver, the channel information indicating a channel switch of the AP to the AP, and
receive, through the transceiver from the AP, information on a selected channel based on the channel information, the selected channel being from of a first channel in a non-dynamic frequency selection (non-DFS) band and a second channel in a DFS band,

wherein the first channel is a channel available in the non-DFS band, and the second channel is a channel available in the DFS band,
wherein the channel information includes information of available second channel in the DFS band and channel availability check time information for channels that are currently unavailable in the DFS band, and priority information for each of the at least one second channel, and
wherein the DFS band is a WLAN band available for transmission of the radar signal and the non-DFS band is a WLAN band not overlapping with the DFS band.

13. The apparatus of claim 12 ,
wherein the channel information is determined based on ambient channel information, and
wherein the ambient channel information includes a channel number.

14. The apparatus of claim 12 , wherein the channel information is determined based on a dynamic frequency selection (DFS) channel having the radar signal and another DFS channel lacking the radar signal.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jung Ha-Kyung
• Kim Jin-Hyoung
• Lee Jin-Ho

Classifications

• G01S7/023

  Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques (auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36) · CPC title

• H04B1/1027 Primary

  assessing signal quality or detecting noise/interference for the received signal · CPC title

• H04W72/04 Primary

  Wireless resource allocation · CPC title

• H04K3/20

  Countermeasures against jamming (in radar G01S7/36; interference suppression in receivers H04B1/10) · CPC title

• H04K3/226

  Selection of non-jammed channel for communication (spectrum sharing arrangements H04W16/14; selection of wireless resources by user or terminal H04W72/02) · CPC title