Achieving better performance in l + l modems

Patent metadata

Field	Value
Publication number	US-2018167984-A1
Application number	US-201615378429-A
Country	US
Kind code	A1
Filing date	Dec 14, 2016
Priority date	Dec 14, 2016
Publication date	Jun 14, 2018
Grant date	—

Abstract

A method for reestablishing a radio resource control (RRC) connection on a second subscription upon completion of a voice call on a first subscription for a multi-subscriber identity module (SIM) multi-standby (MSMS) mobile communication device, includes: starting a voice call timer at the start of the voice call on the first subscription; stopping the voice call timer upon completion of the voice call on the first subscription; determining an elapsed time of the voice call on the first subscription based on a value of the voice call timer; and determining whether the elapsed time of the voice call on the first subscription is greater than a value of a network connectivity timer.

First claim

What is claimed is:

1 . A method for reestablishing a radio resource control (RRC) connection on a second subscription upon completion of a voice call on a first subscription for a multi-subscriber identity module (SIM) multi-standby (MSMS) mobile communication device, the method comprising:
starting a voice call timer at the start of the voice call on the first subscription; stopping the voice call timer upon completion of the voice call on the first subscription; determining an elapsed time of the voice call on the first subscription based on a value of the voice call timer; and determining whether the elapsed time of the voice call on the first subscription is greater than a value of a network connectivity timer.

2 . The method of claim 1 , further comprising:
in response to determining that the elapsed time of the voice call on the first subscription is not greater than the value of the network connectivity timer, performing a radio link failure (RLF) recovery procedure on the second subscription.

3 . The method of claim 1 , further comprising:
in response to determining that the elapsed time of the voice call on the first subscription is greater than the value of the network connectivity timer, performing a radio resource control (RRC) connection release procedure on the second subscription.

4 . The method of claim 3 , further comprising:
determining whether the first subscription and the second subscription communicate on a same public land mobile network (PLMN) or a roaming partner of the same PLMN; and in response to determining that the first subscription and the second subscription communicate on the same PLMN or a roaming partner of the same PLMN, performing a targeted acquisition procedure.

5 . The method of claim 4 , wherein the targeted acquisition procedure comprises:
performing an RRC connection procedure on the second subscription using the physical cell identification (PCI) and frequency used by the first subscription.

6 . The method of claim 1 , further comprising:
determining the value of the network connectivity timer from one or more predetermined network connectivity timer values stored in a memory of the MSMS mobile communication device.

7 . The method of claim 1 , further comprising:
determining the value of the network connectivity timer via dedicated or broadcast signaling received from a communication network.

8 . The method of claim 1 , further comprising:
determining the value of the network connectivity timer by estimating the value of the network connectivity timer.

9 . The method of claim 8 , wherein the estimating the value of the network connectivity timer comprises:
setting an upper limit for an estimated value for the inactivity time; determining if the elapsed time of the voice call on the first subscription is greater than the estimated value for the inactivity time; and in response to determining that the elapsed time of the voice call on the first subscription is not greater than the estimated value for the inactivity time, storing the elapsed time of the voice call on the first subscription as the estimated value for the inactivity time.

10 . A multi-subscriber identity module (SIM) multi-standby (MSMS) mobile communication device, comprising:
a communication unit configured to communicate with one or more communication networks; a memory operably connected to the communication unit; a timing unit configured to implement one or more timers; and a control unit operably connected to the communication unit, the memory, and the timing unit, the control unit configured to:
control the timing unit to start a voice call timer at the start of a voice call on a first subscription;
control the timing unit to stop the voice call timer upon completion of the voice call on the first subscription;
determine an elapsed time of the voice call on the first subscription based on a value of the voice call timer; and
determine whether the elapsed time of the voice call on the first subscription is greater than a value of a network connectivity timer.

11 . The MSMS mobile communication device of claim 10 , wherein the control unit is further configured to:
in response to determining that the elapsed time of the voice call on the first subscription is not greater than the value of the network connectivity timer, control the communication unit to perform a radio link failure (RLF) recovery procedure on the second subscription.

12 . The MSMS mobile communication device of claim 10 , wherein the control unit is further configured to:
in response to determining that the elapsed time of the voice call on the first subscription is greater than the value of the network connectivity timer, control the communication unit to perform a radio resource control (RRC) connection release procedure on the second subscription.

13 . The MSMS mobile communication device of claim 12 , wherein the control unit is further configured to:
determine whether the first subscription and the second subscription communicate on a same public land mobile network (PLMN) or a roaming partner of the same PLMN; and in response to determining that the first subscription and the second subscription communicate on the same PLMN or a roaming partner of the same PLMN, control the communication unit to perform a targeted acquisition procedure.

14 . The MSMS mobile communication device of claim 13 , wherein the targeted acquisition procedure comprises:
controlling the communication unit to perform an RRC connection procedure on the second subscription using the physical cell identification (PCI) and frequency used by the first subscription.

15 . The MSMS mobile communication device of claim 10 , wherein the control unit is further configured to:
determine the value of the network connectivity timer from one or more predetermined network connectivity timer values stored in the memory of the MSMS mobile communication device.

16 . The MSMS mobile communication device of claim 10 , wherein the control unit is further configured to:
control the communication unit to receive dedicated or broadcast signaling received from a communication network; and determine the value of the network connectivity timer via the dedicated or broadcast signaling.

17 . The MSMS mobile communication device of claim 10 , wherein the control unit is further configured to:
determine the value of the network connectivity timer by estimating the value of the network connectivity timer.

18 . The MSMS mobile communication device of claim 17 , wherein the control unit is further configured to estimate the value of the network connectivity timer by:
accessing an upper limit for an estimated value for the inactivity time from the memory; determining if the elapsed time of the voice call on the first subscription is greater than the estimated value for the inactivity time; and in response to determining that the elapsed time of the voice call on the first subscription is not greater than the estimated value for the inactivity time, storing the elapsed time of the voice call on the first subscription as the estimated value for the inactivity time.

19 . A non-transitory computer readable medium having stored thereon instructions for causing one or more processors to perform a method for reestablishing a radio resource control (RRC) connection on a second subscription upon completion of a voice call on a first subscription for a multi-subscriber identity module (SIM) multi-standby (MSMS) mobile communicati

Assignees

• Qualcomm Inc

Inventors

• Krishnamoorthy Parthasarathy
• Kitabi Ammar
• Bathija Jayesh
• Appani Praveen Kumar
• Mohan Prashanth
• Dhanapal Muthukumaran
• Raghunathan Shravan Kumar
• Marwah Vijay
• Bansal Hargovind Prasad
• Shah Sagar Bharatkumar
• Annam Raevanth Venkat
• Pasunooru Naveen Kumar
• Ramkumar Vasanth Kumar

Classifications

• H04W88/06

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

• H04W76/38

  triggered by timers · CPC title

• H04W84/042

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

• H04B1/3816 Primary

  Mechanical arrangements for accommodating identification devices, e.g. cards or chips; with connectors for programming identification devices · CPC title

• H04W76/19 Primary

  Connection re-establishment · CPC title