Qualcomm Incorporated

Subbarayudu Mutya

Mungal Singh Dhanda

Simon James Walke

Venkata Raji Reddy Kanthala

Bhanu Kiran Janga

Nigel Phillip Robinson

Ajit Gupta

Suresh Sanka

Sathish Krishnamoorthy

Chih-Ping Hsu

Debesh Kumar Sahu

Ankit Maheshwari

Shawn C Morrison

Venkata Appala Naidu Babbadi

Akash Kumar

Divaydeep Sikri

Dhananjaya Sarma Ponukumati

Raghavendra Shyam Anand

Shivank Nayak

Ling Hang

Hemanth Kumar Rayapati

Deepti Mani

Revathi Sundara Raghavan

Qijia Liu

Niranjan Kumar Vadlamudi

Ashish Malik

Venkata Krishna Murthy Jayavarapu

Nikhil Challa

Rakesh Surapaneni

Parthiban Rajendran

Vvd Subrahmanyam Kalepu

Certain aspects of the present disclosure generally relate to wireless communication. A wireless communication device may determine a plurality of differential back-off values based at least in part on at least one of a set of parameter values relating to one or more of a plurality of uplink carriers associated with uplink carrier aggregation or any uplink grants associated with the plurality of uplink carriers. The plurality of differential back-off values may relate to a specific absorption rate (SAR) back-off or a thermal back-off of the wireless communication device. The wireless communication device may apply the plurality of differential back-off values to a respective plurality of transmit powers associated, respectively, with the plurality of uplink carriers.

Techniques and apparatuses for differential back-off for long term evolution advanced (LTE-A) uplink carrier aggregation (ULCA)

Exemplary embodiments are directed to operation of a device supporting multiple SIMs. A method may include detecting a paging collision scenario between a first subscription and at least a second subscription. The method may further include modifying a page reading operation of at least one of the first subscription and the at least a second subscription to avoid a paging collision between the first subscription and the at least a second subscription. Other aspects, embodiments, and features are also claimed and described in the application.

Operation of devices supporting multiple SIMs

A wireless communication device includes: a first communications unit configured to communicate with a first communication network; a second communications unit configured to communicate with a second communication network; a control unit configured to control operation of the wireless communication device; and one or more temperature sensors configured to sense operating temperatures of the first communications unit and the second communications unit and provide temperature signals to the control unit. In response to a determination that an operating temperature of the first communications unit conducting a first call exceeds a predetermined threshold temperature and an operating temperature of the second communications unit does not exceed the predetermined threshold temperature, the control unit is configured to cause the first call on the first communications unit to be switched from a first transceiver chain in the first communications unit to a second transceiver chain in the second communications unit.

Temperature control at power amplifier with transceiver switching

Various embodiments enable a multi-SIM multi-active (MSMA) communication device to operate a power amplifier in a power saving envelope tracking mode when a first radio frequency (RF) resource is supporting data transmission to a communication network associated with a first SIM and a second RF resource is supporting a voice call in discontinuous transmission mode. A MSMA communication device processor may monitor the second RF resource supporting the voice call for silence periods, the power amplifier of the first RF resource may operate in a first power-saving mode during silence periods on the voice call, and the power amplifier of the first RF resource may operate in a second power-saving mode when the voice call on second RF resource is not in a period of silence. Periods of silence may be determined by monitoring a protocol stack of the second RF resource for silence descriptor (SID) frames scheduled for transmission.

System and methods for improving opportunistic envelope tracking in a multi-subscriber identity module (SIM) wireless communication device

Methods and devices are disclosed for enabling improved performance for page decodes on a SIM of a multi-SIM wireless communication device in which a shared radio frequency (RF) resource is used to read system information for a different SIM. After determining that a first SIM is using the shared RF resource to decode SIBs, the wireless device may receive information about an upcoming page decode time for monitoring a paging channel associated with the second SIM. The wireless device may obtain system information block (SIB) scheduling information associated with the first SIM, and may create a RF resource release gap during the system information read period based on the SIB scheduling information and the upcoming page decode time. Control of the RF resource may be released from the modem stack associated within the first SIM, and gained by a modem stack associated with the second SIM during the RF resource release gap.

System and methods for improving page decode performance during reading of system information on a multi-SIM wireless communication device

A method for receiving cell broadcast messages is described. The method includes communicating with a first cell. The method also includes switching to communicating with a second cell. A cell broadcast channel is read after switching cells. The method further includes switching from a dedicated mode to a packet idle mode. The cell broadcast channel is reread once after switching from a dedicated mode to a packet idle mode. Other aspects, embodiments and features are also claimed and described.

Receiving cell broadcast (CB) messages

Methods and apparatus of tune away in wireless communications include receiving a master information block (MIB) from a first subscription network entity on a first subscription in a user equipment (UE). The method further includes determining system information block (SIB) scheduling information associated with the first subscription network entity. Moreover, the method includes tuning away from the first subscription to a second subscription.

Methods and apparatuses for optimization of multiple subscription device performance

Systems, methods, and devices providing a framework which reduces the amount of switching required by single transceiver hardware chain mobile devices operating multiple cellular technology and/or service stacks. The various embodiments enable two or more service stacks on the mobile device of various cellular technologies (e.g., 3GPP GSM, UMTS, LTE, WCDMA, etc), to share information, such as network measurements. The various embodiments may also enable one service stack to perform procedures for and provide information to another service stack.

Performing neighbor cell activities in a multi-stack device

A particular method includes receiving first data via a first network at a device that is configured to receive the first data via the first network based on a first wireless communication subscription and is configured to receive second data via a second network based on a second wireless communication subscription. The method also includes while receiving the first data, determining that a tuneaway period associated with the second network has passed, where the tuneaway period is longer than a discontinuous reception (DRX) cycle length associated with the second network. The method further includes tuning a receiver of the device to a paging channel of the second network in response to passing of the tuneaway period.

Mobile device tune away periods

A particular method includes sending a request from a mobile device associated with a plurality of subscriptions to a wireless communication network. The request indicates a time period requested by the mobile device as a non-communication time period of the wireless communication network with respect to the mobile device.

Mobile device requests of non-communication time periods to a wireless communication network

Aspects of the present disclosure relate to wireless communications and techniques for determining a power save duration for an out of service subscription based, at least in part, on a detected mobility status change of a mobile device. Aspects generally include a mobile device, that shares a single radio resource for establishing connections with a first and second subscription, using a detected mobility status change to determine a power saving duration for an out of service subscription.

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Hyderabad Telangana, India

Subbarayudu Mutya