Collision Elimination Through Forced Reselection of Cells in Multi-SIM Mobile Devices

Patent metadata

Field	Value
Publication number	US-2015141017-A1
Application number	US-201314082324-A
Country	US
Kind code	A1
Filing date	Nov 18, 2013
Priority date	Nov 18, 2013
Publication date	May 21, 2015
Grant date	—

Abstract

The various embodiments provide methods for implementing a forced reselection strategy after causing colliding subscriptions to perform reselection to neighboring cells. In various embodiments, the MSMS communication device may undo the effects of forced reselection in certain situations when continuing to employ forced reselection may be ineffective. In other embodiments, the MSMS communication device may force reselecting subscriptions to reselect to neighboring cells in a paging group based on the page timings of the neighboring cells. Thus, the various embodiments may increase the performance of the colliding subscriptions and may enhance the user's overall experience.

First claim

What is claimed is:

1 . A method of managing forced reselections for multiple colliding subscriptions on a multi-SIM-multi-standby communication device comprising a plurality of subscriptions, comprising:
forcing a reselecting subscription in the multiple colliding subscriptions to perform reselection when persistent collisions among the multiple colliding subscriptions are detected; and implementing a forced reselection strategy after forcing the reselecting subscription to perform reselection.

2 . The method of claim 1 , wherein implementing a forced reselection strategy comprises:
determining whether a camped subscription in the multiple colliding subscriptions has reselected to another cell; and forcing the reselecting subscription to fall back to its original cell in response to determining that the camped subscription has reselected to the another cell.

3 . The method of claim 1 , wherein implementing a forced reselection strategy comprises:
determining whether the reselecting subscription has set up a call on a neighboring cell; determining whether the reselecting subscription's original cell is preferable to the neighboring cell in response to determining that the reselecting subscription has set up the call on the neighboring cell; and forcing the reselecting subscription to fall back to its original cell in response to determining that its original cell is preferable to the neighboring cell.

4 . The method of claim 3 , further comprising sending fabricated measurement reports to the neighboring cell to facilitate handoff of the call to the reselecting subscription's original cell.

5 . The method of claim 3 , further comprising:
determining whether the call is over; and forcing the reselecting subscription to reselect back to the neighboring cell in response to determining that the call is over.

6 . The method of claim 1 , wherein implementing a forced reselection strategy comprises:
initially setting a reselection counter for each of the plurality of subscriptions; determining whether the reselection counter for the reselecting subscription is greater than a reselection threshold when persistent collisions are detected among the multiple colliding subscriptions; forcing the reselecting subscription to perform reselection to a neighboring cell in response to determining that the reselection counter for the reselecting subscription is not greater than the reselection threshold; incrementing the reselection counter of the reselecting subscription after forcing the reselecting subscription to perform reselection; and performing page collision arbitration for the reselecting subscription in response to determining that the reselection counter for the reselecting subscription is greater than the reselection threshold.

7 . The method of claim 6 , further comprising resetting the reselection counter for each of the plurality of subscriptions when persistent collisions are not detected among the multiple colliding subscriptions.

8 . The method of claim 6 , further comprising:
determining whether a camped subscription has reselected to another cell; forcing the reselecting subscription to fall back to its original cell in response to determining that the camped subscription has reselected to the another cell; and resetting the reselection counter for each of the plurality of subscriptions after forcing the reselecting subscription to fall back to its original cell.

9 . The method of claim 6 , further comprising forcing the reselecting subscription to fall back to its original cell in response to determining that the reselection counter for the reselecting subscription is greater than the reselection threshold.

10 . The method of claim 1 , wherein forcing a reselecting subscription to perform reselection comprises:
selecting a potential neighboring cell for the reselecting subscription; determining a page timing for the potential neighboring cell; determining whether the page timing of the potential neighboring cell conflicts with another cell's page timing, wherein a subscription in the plurality of subscriptions is currently camped on the another cell; and forcing the reselecting subscription to reselect to the potential neighboring cell in response to determining that the page timing of the potential neighboring cell does not conflict with the another cell's page timing.

11 . The method of claim 10 , further comprising:
determining whether another potential neighboring cell is available for the reselecting subscription in response to determining that the page timing of the potential neighboring cell does conflict with the another cell's page timing; selecting the another potential neighboring cell in response to determining that the another potential neighboring cell is available; and forcing the reselecting subscription to reselect to the potential neighboring cell in response to determining that the another potential neighboring cell is not available.

12 . The method of claim 10 , wherein determining a page timing for the potential neighboring cell comprises:
starting a timer; receiving information over a broadcast control channel; determining a common control channel group (CCCH_GROUP) parameter based on the received information; determining a paging group (PAGING_GROUP) parameter based on the received information; and determining an arrival time of page bursts on the potential neighboring cell based the CCCH_GROUP parameter, the PAGING_GROUP parameter, and the timer.

13 . A multi-SIM-multi-standby communication device, comprising:
means for forcing a reselecting subscription in multiple colliding subscriptions in a plurality of subscriptions operating on the multi-SIM-multi-standby communication device to perform reselection when persistent collisions among the multiple colliding subscriptions are detected; and means for implementing a forced reselection strategy after forcing the reselecting subscription to perform reselection.

14 . The multi-SIM-multi-standby communication device of claim 13 , wherein means for implementing a forced reselection strategy comprises:
means for determining whether a camped subscription in the multiple colliding subscriptions has reselected to another cell; and means for forcing the reselecting subscription to fall back to its original cell in response to determining that the camped subscription has reselected to the another cell.

15 . The multi-SIM-multi-standby communication device of claim 13 , wherein means for implementing a forced reselection strategy comprises:
means for determining whether the reselecting subscription has set up a call on a neighboring cell; means for determining whether the reselecting subscription's original cell is preferable to the neighboring cell in response to determining that the reselecting subscription has set up the call on the neighboring cell; and means for forcing the reselecting subscription to fall back to its original cell in response to determining that its original cell is preferable to the neighboring cell.

16 . The multi-SIM-multi-standby communication device of claim 15 , further comprising means for sending fabricated measurement reports to the neighboring cell to facilitate handoff of the call to the reselecting subscription's original cell.

17 . The multi-SIM-multi-standby communication device of claim 15 , further comprising:
means for determining whether the call is over; and means for forcing the reselecting subscription to reselect back to the neighboring cell in response to determining that the ca

Assignees

• Qualcomm Inc

Inventors

• Krishnamoorthy Parthasarathy
• Rajurkar Anand
• Ananda Manjunatha Subbamma
• Anand Raghavendra
• Nimishakavi Sanjeev Ramachandra

Classifications

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W36/08

  Reselecting an access point · CPC title

• H04W36/0066 Primary

  of control information between different types of networks in order to establish a new radio link in the target network · CPC title

• H04W36/0072

  of resource information of target access point · CPC title

• H04W68/02

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