Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020112606 - INFORMING AN UPPER LAYER OF BARRING ALLEVIATION FOR MULTIPLE ACCESS CLASSES

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

What is claimed is:

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:

determining, at a radio resource control layer of the user equipment, that a 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 at least the first access class and a second access class;

responsive to receiving the rejection message, activating, at the radio resource control layer, a common bar timer;

responsive to the common bar timer becoming inactive, determining that the barring of at least the first access class and the second access class is alleviated based on respective specific bar timers associated with at least the first access class and the second access class being inactive; and

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

2. The method of claim 1, wherein:

the first barring message indicates barring of at least the first access class, the second access class, and a third access class;

the determining that the barring of at least the first access class and the second access class is alleviated comprises determining that the barring of at least the first access class, the second access class, and the third access class is alleviated based on the respective specific bar timers associated with at least the first access class, the second access class, and the third access class being inactive; and

the first alleviation message indicates alleviation of the barring of at least the first access class, the second access class, and the third access class.

3. The method of claim 1 or claim 2, further comprising:

prior to the determining that the first access class is not barred, receiving, at the radio resource control layer from the upper layer, a first request message associated with a fourth access class that is different from the first access class and the 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 that 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.

4. The method of claim 1 or claim 2, further comprising:

prior to the determining that the first access class is not barred, receiving, at the radio resource control layer from the upper layer, a first request message associated with a fourth access class that is different from the first access class and the 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; and

responsive to the first specific bar timer expiring prior to the common bar timing becoming inactive, determining that the barring of the fourth access class is alleviated, wherein the first alleviation message indicates alleviation of the barring of at least the first access class, the second access class, and the fourth access class.

5. The method of claim 3 or claim 4, wherein the fourth access class and the first access class are associated with a same access category type and have different access category numbers.

6. The method of any preceding claim, further comprising:

determining, after the sending of the first barring message, that a fifth access class is not barred at the radio resource control layer, the fifth access class being different than the first access class and the second access class;

sending a second connection request message from the radio resource control layer to the network to request establishment of a second wireless connection associated with the fifth access class;

receiving, from the network at the radio resource control layer, a grant message that approves the second connection request message; and

responsive to the receiving of the grant message, stopping the common bar timer.

7. The method of any preceding claim, further comprising:

prior to the determining that the first access class is not barred, receiving, at the radio resource control layer from the upper layer, a second request message associated with the second access class;

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

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

starting a second specific bar timer with a second wait time that causes the second specific bar timer to expire after the common bar timer expires; and

responsive to the common bar timer becoming inactive, stopping the second specific bar timer prior to the determining that the barring of at least the first access class and the second access class is alleviated.

8. The method of any of claims 1 to 6, further comprising:

prior to the determining that the first access class is not barred, receiving, at the radio resource control layer from the upper layer, a second request message associated with the second access class;

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

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

starting a second specific bar timer with a second wait time that causes the second specific bar timer to expire before the common bar timer expires.

9. The method of any preceding claim, further comprising:

selecting, prior to the determining that the first access class is not barred, a first cell; performing, after the providing the first barring message, a cell selection procedure that selects a second cell different than the first cell; and

responsive to selecting the second cell, stopping the common bar timer.

10. The method of any preceding claim, wherein:

the first barring message indicates that at least one exempt access class is not barred; and

the at least one exempt access class is associated with at least one of the following access category types:

a mobile-terminated access type; or

an emergency type.

11. The method of any preceding claim, further comprising:

performing a unified access control procedure at the radio resource control layer of the user equipment,

wherein the determining that the first access class is not barred is based on the unified access control procedure.

12. The method of any preceding claim, wherein:

the rejection message includes a third wait time indicating a duration for which the first access class and the second access class are temporarily barred; and

the activating the common bar timer comprises starting the common bar timer with the third wait time.

13. The method of any preceding claim, wherein the common bar timer becomes inactive based on the common bar timer expiring or the common bar timer stopping.

14. The method of any preceding claim, wherein the first access class and the second access class are non-exempt access classes.

15. A user equipment comprising:

a radio-frequency transceiver; and

a processor and memory system configured to perform the method of any of cl ims 1-14.

16. A processor-readable medium having instructions stored thereon that, when executed by a processor, cause the processor to perform the method of any of claims 1-14.