Methods, system and access point of a WLAN for handling a wireless device connected to an access point

Patent metadata

Field	Value
Publication number	US-12418844-B2
Application number	US-202018023153-A
Country	US
Kind code	B2
Filing date	Aug 25, 2020
Priority date	Aug 25, 2020
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

Disclosed is a method performed by an access point, AP ( 120 ), of a WLAN ( 125 ), for handling a wireless device ( 140 ) connected to the AP ( 120 ). The method comprises obtaining information on signal quality of signals sent between the AP ( 120 ) and the wireless device ( 140 ), and when the obtained information on signal quality reveals that the signal quality is below a signal quality threshold, determining a current value of a wireless device characteristic. The method further comprises obtaining, from a pre-emptive handover system ( 150 ), an estimation of a likelihood of the wireless device ( 140 ) disconnecting from the WLAN for the current value of the wireless device characteristic, wherein the likelihood was determined from statistical information of earlier handling of the wireless device ( 140 ) by the AP ( 120 ) for different values of the wireless device characteristics. Further, when the received estimation of likelihood is above a likelihood threshold, accelerating a handover process of the wireless device ( 140 ) connection from the AP ( 120 ) to a network node ( 130 ) of a cellular communication network ( 100 ).

First claim

The invention claimed is:

1. A method performed by an access point (AP) of a wireless local area network (WLAN) for handling a wireless device connected to the AP, the method comprising:
obtaining information on signal quality of signals sent between the AP and the wireless device;
when the obtained information on signal quality reveals that the signal quality is below a signal quality threshold, determining a current value of a wireless device characteristic;
sending, to a pre-emptive handover system, a request for information on likelihood of the wireless device disconnecting from the WLAN for the current value of the wireless device characteristic;
receiving, from the pre-emptive handover system and in response to the request, an estimation of the likelihood of the wireless device disconnecting from the WLAN for the current value of the wireless device characteristic, wherein the likelihood was determined from statistical information of earlier handling of the wireless device by the AP for different values of the wireless device characteristics; and
when the received estimation of likelihood is above a likelihood threshold, anticipating WLAN regular procedures for a faster handover process of the wireless device connection from the AP to a network node of a cellular communication network.

2. The method of claim 1 , further comprising, before the obtaining of information on signal quality:
sending, at a plurality of occasions, WLAN connection characteristics for the wireless device together with a current value of the wireless device characteristic to the pre-emptive handover system so that the pre-emptive handover system can determine the likelihood of the wireless device disconnecting from the WLAN, the WLAN connection characteristics indicating whether the WLAN connection for the wireless device was kept or lost in connection with the value of the wireless device characteristics.

3. The method of claim 2 , wherein the occasions when the WLAN connection characteristics are sent are when the signal quality of signals sent between the AP and the wireless device are below a second threshold.

4. The method of claim 1 , wherein the wireless device characteristic is one or more of: time of day, wireless device download rate, wireless device upload rate, usage of a communication channel between the communication device and the AP, usage of AP communication resources, AP band steering events, signal quality degradation over time.

5. The method of claim 1 , wherein the anticipating of WLAN regular procedures for a faster handover process of the wireless device connection from the AP to the cellular network node comprises stopping sending acknowledgement messages to the wireless device, sending a message to the wireless device instructing the wireless device to handover to the cellular communication network, or avoiding moving the wireless device from a first WLAN radio frequency to a second WLAN radio frequency that is different from the first WLAN radio frequency.

6. A method performed by a pre-emptive handover system for determining a likelihood of a wireless device connected to an access point (AP) of a wireless local-area network (WLAN) disconnecting from the WLAN, the method comprising:
receiving, from the AP at each of a plurality of occasions, a value of a wireless device characteristic for the wireless device together with WLAN connection characteristics indicating whether the WLAN connection of the wireless device was lost or kept in connection with the value of the wireless device characteristic,
determining the likelihood of the wireless device disconnecting from the WLAN for different values of the wireless device characteristic, based on the received WLAN connection characteristics and the values of the wireless device characteristic, and
in response to a request from the AP regarding a certain value of the wireless device characteristic, sending to the AP, information on the determined likelihood of the wireless device disconnecting from the WLAN for the certain value.

7. The method of claim 6 , wherein the wireless device characteristic is one or more of: time of day; wireless device download rate; wireless device upload rate; usage of a communication channel between the communication device and the AP; usage of AP communication resources; AP band steering events, signal quality degradation over time.

8. The method of claim 6 , further comprising receiving, from other APs at each of a plurality of occasions, a value of a wireless device characteristic for other wireless devices together with WLAN connection characteristics indicating whether the WLAN connection of the other wireless devices were lost or kept in connection with the value of the wireless device characteristic, and wherein the determining of the likelihood of the wireless device disconnecting from the WLAN for different values of the wireless device characteristic, is based also on the received WLAN connection characteristics and the values of the wireless device characteristic of the other wireless devices.

9. An access point (AP) operable in a wireless local-area network (WLAN), configured for handling a wireless device connected to the AP, the AP comprising a processing circuitry and a memory, said memory containing instructions executable by said processing circuitry, whereby the AP is configured to:
obtain information on signal quality of signals sent between the AP and the wireless device;
when the obtained information on signal quality reveals that the signal quality is below a signal quality threshold, determine a current value of a wireless device characteristic;
send, to a pre-emptive handover system, a request for information on likelihood of the wireless device disconnecting from the WLAN for the current value of the wireless device characteristic;
receive, from the pre-emptive handover system and in response to the request, an estimation of the likelihood of the wireless device disconnecting from the WLAN for the current value of the wireless device characteristic, wherein the likelihood was determined from statistical information of earlier handling of the wireless device by the AP for different values of the wireless device characteristics; and
when the received estimation of likelihood is above a likelihood threshold, anticipate WLAN regular procedures for a faster handover process of the wireless device connection from the AP to a network node of a cellular communication network.

10. The AP of claim 9 , further configured to, before the obtaining of information on signal quality:
send, at a plurality of occasions, WLAN connection characteristics for the wireless device together with a current value of the wireless device characteristic to the pre-emptive handover system so that the pre-emptive handover system can determine the likelihood of the wireless device disconnecting from the WLAN, the WLAN connection characteristics indicating whether the WLAN connection for the wireless device was kept or lost in connection with the value of the wireless device characteristics.

11. The AP of claim 10 , wherein the plurality of occasions are when the signal quality of signals sent between the AP and the wireless device are below a second threshold.

12. The AP of claim 9 , wherein the wireless device characteristic is one or more of: time of day, wireless device download rate, wireless device upload rate, usage of a communication channel between the communication device and the AP, usage of AP communication resources, AP band steering events, signal quality degradation over time.

13. The AP of claim 9 , wherein the AP is configured to anticipate the WLAN regular procedures f

Assignees

• Ericsson Telefon Ab L M

Inventors

• Nascimento Junior Amadeu
• Marquezini Maria Valéria
• Cavalcante André Mendes

Classifications

• H04W36/302

  due to low signal strength · CPC title

• H04W36/00838

  Resource reservation for handover · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W36/08

  Reselecting an access point · CPC title