Method And Apparatus For Handling Problem Cell In Mobile Communications

Patent metadata

Field	Value
Publication number	US-2018343689-A1
Application number	US-201815989880-A
Country	US
Kind code	A1
Filing date	May 25, 2018
Priority date	May 26, 2017
Publication date	Nov 29, 2018
Grant date	—

Abstract

Various solutions for problem cell handling with respect to user equipment in mobile communications are described. An apparatus may transmit user equipment (UE) capability information to a cell. The apparatus may determine the cell as a problem cell in response to no service received from the cell. The apparatus may reduce a size of the UE capability information. The apparatus may further transmit the reduced UE capability information to the problem cell.

First claim

What is claimed is:

1 . A method, comprising:
determining, by a processor of an apparatus, a cell as a problem cell; reducing, by the processor, a size of user equipment (UE) capability information; and transmitting, by the processor, the reduced UE capability information to the problem cell.

2 . The method of claim 1 , wherein the reducing comprises removing at least one carrier aggregation (CA) band combination from the UE capability information.

3 . The method of claim 1 , wherein the reducing comprises carrying pre-determined carrier aggregation (CA) band combinations in the UE capability information.

4 . The method of claim 1 , wherein the reducing comprises turning off at least one carrier aggregation (CA) capability.

5 . The method of claim 1 , wherein the reducing comprises removing at least one UE supported feature from the UE capability information.

6 . The method of claim 1 , further comprising:
transmitting, by the processor, UE capability information to the cell; and receiving, by the processor, a connection release message from the cell, wherein the determining comprises determining the cell as the problem cell in response to receiving the connection release message.

7 . The method of claim 1 , further comprising:
transmitting, by the processor, UE capability information to the cell; and receiving, by the processor, a detach request message from the cell, wherein the determining comprises determining the cell as the problem cell in response to receiving the detach request message.

8 . The method of claim 1 , further comprising:
transmitting, by the processor, UE capability information to the cell; and initiating, by the processor, a timer, wherein the determining comprises determining the cell as the problem cell in response to expiration of the timer.

9 . The method of claim 1 , further comprising:
transmitting, by the processor, UE capability information to the cell, wherein the determining comprises determining the cell as the problem cell in response to no response received from the cell.

10 . The method of claim 1 , wherein the determining comprises determining the cell as the problem cell according to pre-stored information.

11 . The method of claim 10 , wherein the pre-stored information comprises at least one of a mobile country code (MCC), a mobile network code (MNC), a public land mobile network (PLMN) or cell information.

12 . The method of claim 1 , further comprising:
storing, by the processor, cell information of the problem cell.

13 . The method of claim 1 , further comprising:
initiating, by the processor, a timer for the problem cell; and determining, by the processor, the problem cell as a normal cell in response to expiration of the timer.

14 . A method, comprising:
transmitting, by a processor of an apparatus, user equipment (UE) capability information to a cell; determining, by the processor, the cell as a problem cell in response to no service received from the cell; and performing, by the processor, a reaction to the problem cell.

15 . The method of claim 14 , wherein the performing comprises performing local release of a connection with the problem cell.

16 . The method of claim 14 , wherein the performing comprises adjusting a priority of the problem cell.

17 . The method of claim 14 , wherein the performing comprises barring the problem cell.

18 . The method of claim 14 , further comprising:
re-transmitting, by the processor, the UE capability information to the problem cell; and determining, by the processor, the problem cell as a normal cell in response to receiving service from the problem cell.

19 . The method of claim 14 , further comprising:
triggering, by the processor, a UE capability transfer procedure in response to reselecting or handover to a normal cell.

20 . The method of claim 19 , wherein the triggering comprises performing at least one of detaching from and attaching to the normal cell, switching on and switching off a flight mode, or powering off and powering on.

Assignees

• Mediatek Inc

Inventors

• Wu Meng-Hau
• Liao Shih-Chieh
• Su Tsan-Kuang

Classifications

• H04W76/34 Primary

  Selective release of ongoing connections · CPC title

• H04W76/27

  Transitions between radio resource control [RRC] states · CPC title

• H04W76/19

  Connection re-establishment · CPC title

• H04W76/38

  triggered by timers · CPC title

• H04W84/042

  Public Land Mobile systems, e.g. cellular systems · CPC title