Methods and apparatus for cell verification under UE eDRX

Patent metadata

Field	Value
Publication number	US-10548181-B2
Application number	US-201716074347-A
Country	US
Kind code	B2
Filing date	Jan 31, 2017
Priority date	Feb 1, 2016
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

Systems and methods for cell verification for a wireless device configured to operate under extended Discontinuous Reception (eDRX) are disclosed. In some embodiments, a method of operation of a wireless communication device configured to operate with an eDRX cycle comprises acquiring a first identifier of at least one first cell during a time associated with a first paging time window of the eDRX cycle with which the wireless communication device is configured and acquiring a second identifier of at least one second cell during a time associated with a second paging time window of the eDRX cycle. The method further comprises performing a first type of wireless communication device radio operations if the first identifier is the same as the second identifier and performing a second type of wireless communication device radio operations if the first identifier is different than the second identifier.

First claim

What is claimed is:

1. A method of operation of a wireless communication device configured to operate with an extended Discontinuous Reception, eDRX, cycle, comprising:
acquiring a first identifier of at least one first cell during a time associated with a first paging time window of the eDRX cycle with which the wireless communication device is configured;
acquiring a second identifier of at least one second cell during a time associated with a second paging time window of the eDRX cycle with which the wireless communication device is configured, the second paging time window occurring subsequent to the first paging time window and the at least one second cell being at least one strongest cell as measured by the wireless communication device;
performing a first type of wireless communication device radio operations if the first identifier is the same as the second identifier; and
performing a second type of wireless communication device radio operations if the first identifier is different than the second identifier;
wherein the first identifier of the at least one first cell is a first Cell Global Identifier, CGI, of the at least one first cell and the second identifier of the at least one second cell is a second CGI of the at least one second cell.

2. The method of claim 1 wherein the at least one first cell is at least one serving cell of the wireless communication device.

3. The method of claim 1 wherein the time associated with the first paging time window is one of a time during the first paging time window, a time immediately before the first paging time window, and a time immediately after the first paging time window.

4. The method of claim 1 wherein the time associated with the second paging time window is one of a time during the second paging time window and a time immediately before the second paging time window.

5. The method of claim 1 wherein:
the at least one first cell is at least one serving cell of the wireless communication device; and
the first type of wireless communication device radio operations are wireless communication device radio operations performed on the at least one second cell that are the same as those performed by the wireless communication device on the at least one serving cell when the wireless communication device was served by the at least one serving cell during the first paging time window.

6. The method of claim 1 wherein the at least one first cell is at least one serving cell of the wireless communication device, and performing the first type of wireless communication device radio operations if the first identifier is the same as the second identifier comprises performing one or more radio measurements on signals of the at least one second cell.

7. The method of claim 1 wherein the at least one first cell is at least one serving cell of the wireless communication device, and performing the first type of wireless communication device radio operations if the first identifier is the same as the second identifier comprises performing one or more radio measurements on signals of one or more neighbor cells.

8. The method of claim 1 wherein the at least one first cell is at least one serving cell of the wireless communication device, and performing the first type of wireless communication device radio operations if the first identifier is the same as the second identifier comprises performing, on the at least one second cell, one or more tasks related to a serving cell of the wireless communication device.

9. The method of claim 1 wherein the at least one first cell is at least one serving cell of the wireless communication device, and performing the first type of wireless communication device radio operations if the first identifier is the same as the second identifier comprises performing at least one of a group consisting of:
performing Radio Link Monitoring, RLM, on signals of the at least one second cell;
receiving of one or more control channels of the at least one second cell;
transmitting signals to and/or receiving signals from the at least one second cell based on scheduling information received from a network node; and
sending an indication to a network node that informs the network node that the at least one first cell and the at least one second cell are the same.

10. The method of claim 1 wherein the at least one first cell is at least one serving cell of the wireless communication device, and performing the second type of wireless communication device radio operations if the first identifier is different than the second identifier comprises performing at least one of a group consisting of:
refraining from performing RLM on signals of the at least one second cell;
ignoring any scheduling grant received from the at least one second cell;
refraining from transmitting any data in an uplink on the at least one second cell;
entering idle mode if the wireless communication device is in a connected state;
determining whether the wireless communication device needs to change a tracking area or registration area of the wireless communication device based on whether the at least one second cell belongs to a different tracking area or registration area as compared to that of the at least one first cell;
performing a tracking area update if the at least one second cell does not belong to a previous tracking area of the wireless communication device;
initiating a connection reestablishment to re-establish a connection to the at least one second cell as at least one new serving cell of the wireless communication device;
sending an indication to a network node that informs the network node that the at least one first cell and the at least one second cell are different; and
sending measurement results of measurements performed on the at least one second cell to a network node.

11. The method of claim 1 further comprising:
acquiring a third identifier of a first transmitter associated with the at least one first cell during a time associated with the first paging time window of the eDRX cycle with which the wireless communication device is configured;
acquiring a fourth identifier of a second transmitter associated with the at least one second cell during a time associated with the second paging time window of the eDRX cycle with which the wireless communication device is configured;
performing a third type of wireless communication device radio operations if the third identifier is the same as the fourth identifier; and
performing a fourth type of wireless communication device radio operations of the third identifier is different than the fourth identifier.

12. The method of claim 11 wherein:
the at least one first cell is at least one first shared cell having a plurality of first transmit points, and the first transmitter is a transmit point from among the plurality of first transmit points that satisfies a first predefined criteria; and
the at least one second cell is at least one second shared cell having a plurality of second transmit points, and the second transmitter is a transmit point from among the plurality of second transmit points that satisfies a second predefined criteria.

13. The method of claim 12 wherein:
the first predefined criteria is being a strongest transmit point as measured by the wireless communication device from among the plurality of first transmit points or not being weaker than a first predefined threshold; and
the second predefined criteria is being a strongest transmit point as measured by the wireless communication device from among the plurality of second transmit points or not being weaker than a second predefined threshold.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Siomina Iana
• Kazmi Muhammad

Classifications

• H04W48/16 Primary

  Discovering, processing access restriction or access information · CPC title

• H04W76/28 Primary

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• Y02D30/70

  in wireless communication networks · CPC title