# US 8,542,666 B2 · Method and apparatus for power efficient idle operation in a dual SIM CDMA EVDO mobile station

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- Number: US 8,542,666 B2
- Document ID: US8542666B2
- Status: Granted
- Kind: B2
- Application number: 12/846,518
- Filed: 2010-07-29
- Published: 2012-02-02
- Granted: 2013-09-24
- Earliest claimed: 2010-07-29
- Assignees: QUALCOMM Incorporated
- Applicants: Tom Chin; Guangming Shi; Kuo-Chun Lee
- Inventors: Tom Chin; Guangming Shi; Kuo-Chun Lee
- Web page: https://patentgrep.com/patent/US8542666B2

## CPC

- H04W 68/00: User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Methods and apparatus for configuring and scheduling paging intervals for a mobile station (MS) having multiple subscriber identity modules (SIMs) to be aligned are provided. The MS having multiple SIMs may operate in a network via a particular radio access technology (RAT), such as Code Division Multiple Access (CDMA) EVDO (Evolution-Data Optimized). By having aligned paging intervals, the MS may wake up only once during the paging cycles for the various SIMs rather than waking up multiple times, thereby reducing power consumption of the MS during idle mode compared to a conventional MS with multiple SIMs.

## Claims

### Claim 1

A method for communicating with a mobile station (MS) in a network via a radio access technology (RAT), comprising:
configuring a first paging interval for a first subscriber identity of the mobile station; configuring a second paging interval for a second subscriber identity of the mobile station; and
selecting a same paging interval parameter for the first subscriber identity and the second subscriber identity, such that the first and second paging intervals are aligned.

### Claim 2 (depends on 1)

The method of claim 1, further comprising monitoring for a paging message for either the first or the second subscriber identity during the aligned first and second paging intervals.

### Claim 3 (depends on 2)

The method of claim 2, further comprising entering an idle state outside the aligned first and second paging intervals, wherein the monitoring for the paging message comprises waking up from the idle state.

### Claim 4 (depends on 1)

The method of claim 1, wherein the RAT comprises Code Division Multiple Access (CDMA) Evolution-Data Optimized (EVDO) and the aligned first and second paging intervals comprise the same control channel cycle (CCC).

### Claim 5 (depends on 4)

The method of claim 4, wherein the CCC has an index C and the paging interval parameter comprises a parameter R satisfying (C+R)mod 12=0 according to EVDO Rev 0 or (C+R)mod P=0 according to EVDO Rev A, wherein P=Period 3/256, and wherein Period3 is a sleep period specified in EVDO Rev A.

### Claim 6 (depends on 5)

The method of claim 5, wherein the configuring the first paging interval comprises performing a first EVDO registration for the first subscriber identity and wherein the configuring the second paging interval comprises performing a second EVDO registration for the second subscriber identity based on the same parameter R from the first EVDO registration.

### Claim 7 (depends on 6)

The method of claim 6, wherein the configuring the first paging interval comprises performing the first EVDO registration for the first subscriber identity using a random number SessionSeed to generate the parameter R and wherein the configuring the second paging interval comprises performing the second EVDO registration for the second subscriber identity by transmitting a Configuration Request with a Preferred Control Channel Cycle set to the parameter R.

### Claim 8 (depends on 6)

The method of claim 6, wherein the configuring the first paging interval comprises performing the first EVDO registration for the first subscriber identity by:
selecting the parameter R; and
transmitting a first Configuration Request with a first Preferred Control Channel Cycle set to the selected parameter R; and
wherein the configuring the second paging interval comprises performing the second EVDO registration for the second subscriber identity by transmitting a second Configuration Request with a second Preferred Control Channel Cycle set to the same selected parameter R.

### Claim 9 (depends on 1)

The method of claim 1, wherein the configuring the first paging interval and the configuring the second paging interval are both performed by the MS.

### Claim 10

An apparatus for communicating in a network via a radio access technology (RAT), comprising:
means for configuring a first paging interval for a first subscriber identity;
means for configuring a second paging interval for a second subscriber identity; and
means for selecting a same paging interval parameter for the first subscriber identity and the second subscriber identity, such that the first and second paging intervals are aligned.

### Claim 11 (depends on 10)

The apparatus of claim 10, further comprising means for monitoring for a paging message for either the first or the second subscriber identity during the aligned first and second paging intervals.

### Claim 12 (depends on 11)

The apparatus of claim 11, further comprising means for entering an idle state outside the aligned first and second paging intervals, wherein the means for monitoring for the paging message is configured to wake up from the idle state.

### Claim 13 (depends on 10)

The apparatus of claim 10, wherein the RAT comprises Code Division Multiple Access (CDMA) Evolution-Data Optimized (EVDO) and the aligned first and second paging intervals comprise the same control channel cycle (CCC).

### Claim 14 (depends on 13)

The apparatus of claim 13, wherein the CCC has an index C and the paging interval parameter comprises a parameter R satisfying (C+R)mod 12=0 according to EVDO Rev 0 or (C+R)mod P=0 according to EVDO Rev A, wherein P=Period 3/256, and wherein Period3 is a sleep period specified in EVDO Rev A.

### Claim 15 (depends on 14)

The apparatus of claim 14, wherein the means for configuring the first paging interval is configured to perform a first EVDO registration for the first subscriber identity and wherein the means for configuring the second paging interval is configured to perform a second EVDO registration for the second subscriber identity based on the same parameter R from the first EVDO registration.

### Claim 16 (depends on 15)

The apparatus of claim 15, wherein the means for configuring the first paging interval is configured to perform the first EVDO registration for the first subscriber identity using a random number SessionSeed to generate the parameter R and wherein the means for configuring the second paging interval is configured to perform the second EVDO registration for the second subscriber identity by transmitting a Configuration Request with a Preferred Control Channel Cycle set to the parameter R.

### Claim 17 (depends on 15)

The apparatus of claim 15, wherein the means for configuring the first paging interval is configured to perform the first EVDO registration for the first subscriber identity by:
selecting the parameter R; and
transmitting a first Configuration Request with a first Preferred Control Channel Cycle set to the selected parameter R; and
wherein the means for configuring the second paging interval is configured to perform the second EVDO registration for the second subscriber identity by transmitting a second Configuration Request with a second Preferred Control Channel Cycle set to the same selected parameter R.

### Claim 18 (depends on 10)

The apparatus of claim 10, wherein the apparatus comprises a mobile station (MS).

### Claim 19

An apparatus for communicating in a network via a radio access technology (RAT), comprising:
at least one processor adapted to:
configure a first paging interval for a first subscriber identity;
configure a second paging interval for a second subscriber identity; and
select a same paging interval parameter for the first subscriber identity and the second subscriber identity, such that the first and second paging intervals are aligned; and
a memory coupled to the at least one processor.

### Claim 20 (depends on 19)

The apparatus of claim 19, wherein the at least one processor is adapted to monitor for a paging message for either the first or the second subscriber identity during the aligned first and second paging intervals.

### Claim 21 (depends on 20)

The apparatus of claim 20, wherein the at least one processor is adapted to enter an idle state outside the aligned first and second paging intervals, wherein the at least one processor is adapted to monitor for the paging message by waking up from the idle state.

### Claim 22 (depends on 19)

The apparatus of claim 19, wherein the RAT comprises Code Division Multiple Access (CDMA) Evolution-Data Optimized (EVDO) and the aligned first and second paging intervals comprise the same control channel cycle (CCC).

### Claim 23 (depends on 22)

The apparatus of claim 22, wherein the CCC has an index C and the paging interval parameter comprises a parameter R satisfying (C+R)mod 12=0 according to EVDO Rev 0 or (C+R)mod P=0 according to EVDO Rev A, wherein P=Period 3/256, and wherein Period3 is a sleep period specified in EVDO Rev A.

### Claim 24 (depends on 23)

The apparatus of claim 23, wherein the at least one processor is adapted to configure the first paging interval by performing a first EVDO registration for the first subscriber identity and wherein the at least one processor is adapted to configure the second paging interval by performing a second EVDO registration for the second subscriber identity based on the same parameter R from the first EVDO registration.

### Claim 25 (depends on 24)

The apparatus of claim 24, wherein the at least one processor is adapted to configure the first paging interval by performing the first EVDO registration for the first subscriber identity using a random number SessionSeed to generate the parameter R and wherein the at least one processor is adapted to configure the second paging interval by performing the second EVDO registration for the second subscriber identity by transmitting a Configuration Request with a Preferred Control Channel Cycle set to the parameter R.

### Claim 26 (depends on 24)

The apparatus of claim 24, wherein the at least one processor is adapted to configure the first paging interval by performing the first EVDO registration for the first subscriber identity by:
selecting the parameter R; and
transmitting a first Configuration Request with a first Preferred Control Channel Cycle set to the selected parameter R; and
wherein the at least one processor is adapted to configure the second paging interval by performing the second EVDO registration for the second subscriber identity by transmitting a second Configuration Request with a second Preferred Control Channel Cycle set to the same selected parameter R.

### Claim 27 (depends on 19)

The apparatus of claim 19, wherein the apparatus comprises a mobile station (MS).

### Claim 28

A computer-program product for communicating with a mobile station (MS) in a network via a radio access technology (RAT), the computer-program product comprising:
a non-transitory computer-readable medium comprising code for:
configuring a first paging interval for a first subscriber identity of the mobile station;
configuring a second paging interval for a second subscriber identity of the mobile station; and
selecting a same paging interval parameter for the first subscriber identity and the second subscriber identity, such that the first and second paging intervals are aligned.

### Claim 29 (depends on 28)

The computer-program product of claim 28, further comprising code for monitoring for a paging message for either the first or the second subscriber identity during the aligned first and second paging intervals.

### Claim 30 (depends on 29)

The computer-program product of claim 29, further comprising code for entering an idle state outside the aligned first and second paging intervals, wherein monitoring for the paging message comprises waking up from the idle state.

### Claim 31 (depends on 28)

The computer-program product of claim 28, wherein the RAT comprises Code Division Multiple Access (CDMA) Evolution-Data Optimized (EVDO) and the aligned first and second paging intervals comprise the same control channel cycle (CCC).

### Claim 32 (depends on 31)

The computer-program product of claim 31, wherein the CCC has an index C and the paging interval parameter comprises a parameter R satisfying (C+R)mod 12=0 according to EVDO Rev 0 or (C+R)mod P=0 according to EVDO Rev A, wherein P=Period 3/256, and wherein Period3 is a sleep period specified in EVDO Rev A.

### Claim 33 (depends on 32)

The computer-program product of claim 32, wherein the configuring the first paging interval comprises performing a first EVDO registration for the first subscriber identity and wherein the configuring the second paging interval comprises performing a second EVDO registration for the second subscriber identity based on the same parameter R from the first EVDO registration.

### Claim 34 (depends on 33)

The computer-program product of claim 33, wherein the configuring the first paging interval comprises performing the first EVDO registration for the first subscriber identity using a random number SessionSeed to generate the parameter R and wherein the configuring the second paging interval comprises performing the second EVDO registration for the second subscriber identity by transmitting a Configuration Request with a Preferred Control Channel Cycle set to the parameter R.

### Claim 35 (depends on 33)

The computer-program product of claim 33, wherein the configuring the first paging interval comprises performing the first EVDO registration for the first subscriber identity by:
selecting the parameter R; and
transmitting a first Configuration Request with a first Preferred Control Channel Cycle set to the selected parameter R; and
wherein the configuring the second paging interval comprises performing the second EVDO registration for the second subscriber identity by transmitting a second Configuration Request with a second Preferred Control Channel Cycle set to the same selected parameter R.

### Claim 36 (depends on 28)

The computer-program product of claim 28, wherein the configuring the first paging interval and the configuring the second paging interval are both performed by the MS.