	US 12,408,101 B2
	Informing an upper layer of barring alleviation for multiple access classes
Teming Chen, Taipei (TW)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 17/286,481
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Nov. 25, 2019, PCT No. PCT/US2019/062948 § 371(c)(1), (2) Date Apr. 18, 2021, PCT Pub. No. WO2020/112606, PCT Pub. Date Jun. 4, 2020.
Claims priority of provisional application 62/773,123, filed on Nov. 29, 2018.
Prior Publication US 2021/0392569 A1, Dec. 16, 2021
Int. Cl. H04W 48/16 (2009.01); H04W 68/00 (2009.01); H04W 76/10 (2018.01)

CPC H04W 48/16 (2013.01) [H04W 68/005 (2013.01); H04W 76/10 (2018.02)]

20 Claims

1. A method for informing an upper layer of a user equipment of barring alleviation for multiple access classes, the method comprising the user equipment performing operations including:

receiving, at a radio resource control layer from the upper layer, a first request message associated with a fourth access class that is different from a first access class and a second access class;

determining, at the radio resource control layer, that the fourth access class is barred;

providing, from the radio resource control layer to the upper layer, a second barring message that indicates barring of the fourth access class;

starting a first specific bar timer with a first wait time;

determining, at the radio resource control layer of the user equipment, that the first access class is not barred;

sending, by the radio resource control layer, a first connection request message to a network, the first connection request message requesting permission to establish a first wireless connection associated with the first access class;

receiving, at the radio resource control layer, a rejection message from the network, the rejection message denying the request to establish the first wireless connection;

responsive to the receiving of the rejection message, providing, from the radio resource control layer to the upper layer, a first barring message that indicates barring of the first access class and the second access class;

responsive to receiving the rejection message, activating, at the radio resource control layer, a common bar timer associated with the access classes identified in the first barring message;

responsive to the common bar timer becoming inactive, determining whether or not respective specific bar timers associated with the first access class and the second access class are inactive;

responsive to determining that the respective specific bar timers associated with the first access class and the second access class are inactive, determining that the barring of the first access class and the second access class is alleviated;

providing, from the radio resource control layer to the upper layer, a first alleviation message that indicates alleviation of the barring of the first access class and the second access class; and

if the first wait time causes the first specific bar timer to expire after the common bar timer becomes inactive, and responsive to an expiration of the first specific bar timer, providing, from the radio resource control layer to the upper layer, a second alleviation message that indicates alleviation of the barring of the fourth access class.