Tracking area update management systems and method for aerial user equipment over wireless communcation networks

Patent metadata

Field	Value
Publication number	US-2025350344-A1
Application number	US-202418659103-A
Country	US
Kind code	A1
Filing date	May 9, 2024
Priority date	May 9, 2024
Publication date	Nov 13, 2025
Grant date	—

Abstract

Aspects of the subject disclosure may include, for example, detecting that an operation state of an aerial user equipment (UE) is hovering in one or more tracking areas including a terrestrial tracking area and an aerial tracking area; detecting that a number of TAU messages, having sent to a network counterpart over a predetermined period of time, exceeds a first threshold count, where the TAU messages exceeding the first threshold count, represent a ping-pong condition between cells present at least in the terrestrial tracking area and the aerial tracking area; notifying the network counterpart of cell identifiers (cell IDs) of the cells in the ping-pong condition; forcing the aerial UE to enter into a TAU hold stage; and forcing the aerial UE not to transmit a TAU message during the TAU hold stage. Other embodiments are disclosed.

First claim

What is claimed is:

1 . A device, comprising:
a processing system including a processor; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, the operations comprising: receiving, from an aerial user equipment (UE), a plurality of tracking area update (TAU) messages exceeding a threshold count of TAU messages set over a predetermined period of time, wherein the plurality of TAU messages exceeding the threshold count is indicative of an idle mode of the aerial UE, wherein, in the idle mode, the aerial UE is involved in a repeated cell reselection at least between a first tracking area and a second tracking area, the first tracking area having a cluster of terrestrial cells and the second tracking area having a cluster of aerial cells, and wherein the aerial UE was registered to one of the cluster of aerial cells during an initial attachment, receiving, from the aerial UE, a notification of cell identifiers (cell IDs) of cells, among the cluster of terrestrial cells and the cluster of aerial cells, that have been associated with the aerial UE through the repeated cell reselection; and receiving no TAU message for a first extended period of time greater than the predetermined period of time.

2 . The device of claim 1 , wherein the operations further comprise:
sending or receiving no data, to or from the aerial UE, over a second extended period of time greater than the predetermined period of time; and receiving, from the aerial UE, a first notification of the idle mode and an identity of a last cell to which the aerial UE was attached.

3 . The device of claim 2 , wherein the operations further comprise:
upon arrival of relevant data, transmitting one or more paging messages to the aerial UE using the received identity of the last cell to which the aerial UE was attached to notify that the relevant data have been received for the aerial UE.

4 . The device of claim 3 , wherein the operations further comprise:
receiving, from the aerial UE, a confirmation message in response to the one or more paging messages and an identity of a current cell that the aerial UE is camped on; upon the receipt of the confirmation message, sending the relevant data to the aerial UE; and upon receipt of no confirmation message, resending the one or more paging messages to a plurality of neighboring cells around the last cell to which the aerial UE was attached, wherein the plurality of neighboring cells and the last cell are in a same tracking area.

5 . The device of claim 1 , wherein the operations further comprise:
sending or receiving no data to or from the aerial UE over a second extended period of time greater than the predetermined period of time; and receiving, from the aerial UE, a tracking area update message identifying a current cell in a different tracking area on which the aerial UE is camped.

6 . The device of claim 1 , wherein the operations further comprise receiving from the aerial UE, a second notification the aerial UE has entered into a TAU hold stage.

7 . The device of claim 1 , wherein the operations further comprise:
receiving an identifier of the aerial UE; and determining that the aerial UE is an autonomous aerial vehicle.

8 . The device of claim 1 , wherein the operations further comprise:
subsequent to a passage of the second extended period of time, receiving a series of TAU messages from the aerial UE; and estimating a location of the aerial UE based on the received series of TAU messages.

9 . A non-transitory, machine-readable medium, comprising executable instructions that, when executed by a processing system of an aerial user equipment including a processor, facilitate performance of operations, the operations comprising:
detecting that an operation state of an aerial user equipment (UE) is hovering in two or more tracking areas, wherein the two or more tracking areas comprise a terrestrial tracking area and an aerial tracking area; detecting that a number of TAU messages, having sent to a network counterpart over a predetermined period of time, exceeds a first threshold count, wherein the TAU messages exceeding the first threshold count, represent a ping-pong condition between cells present at least in the terrestrial tracking area and the aerial tracking area; notifying the network counterpart of cell identifiers (cell IDs) of the cells related to the ping-pong condition; forcing the aerial UE to enter into a TAU hold stage; and forcing the aerial UE to transmit no TAU message during the TAU hold stage.

10 . The machine-readable medium of claim 9 , wherein the operations further comprise, upon detection that the operation state of the aerial UE is no longer hovering, releasing the aerial UE from the TAU hold stage.

11 . The machine-readable medium of claim 9 , wherein then forcing the aerial UE to transmit no TAU message further comprises transmitting no TAU message when the aerial UE is attached to a different cell during the TAU hold stage.

12 . The machine-readable medium of claim 9 , wherein the detecting that the operation state of the aerial UE is hovering further comprises detecting variations of latitude, longitude, altitude or a combination thereof of the aerial UE, by a predetermined degree smaller than a second threshold degree.

13 . The machine-readable medium of claim 9 , wherein the operations further comprise:
detecting that the operation state of the aerial UE has entered into an idle mode; sending, to the network counterpart, a first notification of the idle mode and an identity of a last cell to which the aerial UE was attached at the time that the aerial UE has entered into the idle mode; receiving, from the network counterpart, a paging message via the last cell to which the aerial UE was attached; and sending, to the network counterpart, a confirmation message to the paging message and an identity of a first current cell where the aerial UE is camped, when the first current cell and the last cell are in a same tracking area; or sending, to the network counterpart, a TAU message identifying a second current cell in a different tracking area and to which the aerial UE is currently attached.

14 . The machine-readable medium of claim 9 , wherein, in the ping-pong condition between cells, the aerial UE is switched to the terrestrial tracking area from the aerial tracking area and switched back to the terrestrial tracking area.

15 . A method, comprising:
detecting, by a processing system of an unmanned aerial vehicle including a processor, that an operation state of the unmanned aerial vehicle (UAV) has entered into an idle mode; detecting, by the processing system, that a number of TAU messages, having sent to a network counterpart over a predetermined period of time, exceeds a first threshold count, wherein the TAU messages exceeding the first threshold count indicate a hovering condition of the UAV at least between a first tracking area and a second tracking area, the first tracking area having a cluster of terrestrial cells and the second tracking area having a cluster of aerial cells, and wherein the UAV was registered to one of the cluster of aerial cells during an initial attachment; notifying, by the processing system, the network counterpart of the detected idle mode of the UAV; transmitting, by the processing system, cell identifiers (cell IDs) of cells that the UAV has been connected in the hovering condition; activating, by the processing system, a TAU hold mode; and blocking, by the processing system, a TAU message from being sent

Assignees

• At&T Technical Services Company Inc

Inventors

• Vivanco Daniel

Classifications

• H04B7/18502 Primary

  Airborne stations · CPC title

• H04W68/02 Primary

  Arrangements for increasing efficiency of notification or paging channel · CPC title