Qualcomm Incorporated

Suresh Sanka

Sathish Krishnamoorthy

Mukesh Kumar

Vishnu Namboodiri Karakkad Kesavan Namboodiri

Anand Rajurkar

Subbarayudu Mutya

Masato Kitazoe

Daniel Amerga

Parthasarathy Krishnamoorthy

Shashidhar Vummintala

Srividhya Krishnamoorthy

Kiran Patil

Janga Reddy Alimineti

Ajit Gupta

Sanjay Kenchareddy

Kiran KishanRao Patil

Kishore Kumar Yannakula

Preeti Srinivas Rao

Venkata Appala Naidu Babbadi

Kuo-Chun Lee

Srinivasan Balasubramanian

Aziz Gholmieh

Reza Shahidi

Sitaramanjaneyulu Kanamarlapudi

Mungal Singh Dhanda

Liangchi Hsu

Prashanth Hosabettu Mohan

Chetan Chakravarthy

Bhaskara Viswanadham Batchu

Ansah Ahmed Sheik

Raghavendra Shyam Ananda

KrishnaKumar Vasanthasenan

Priyangshu Ghosh

Uttam Pattanayak

Hemanth Kumar Rayapati

Bhanu Kiran Janga

Deepti Mani

Rajiv R Nambiar

Ankur Srivastava

Chinmaya Padhy

Aravinth Rajendran

Rajesh Gopala Krishnan

Vagish Gupta

Karthik Dumpala

Ajay Venkatsuresh

Theeksha Athoor Perumal

Himanshu Dutta

Ravi Kishore Paruchuru

Nikhil Challa

Rakesh Surapaneni

Sahas Sathyanarayana

Arun Agarwal

Kamalpreet Singh Padam

Vinoth Palaniappan

Asimava Bera

Embodiments include systems and methods that may be performed by a processor of a multi-subscription wireless device for managing beam selection. Various embodiments may include determining a rotation angle between an orientation of a first beam of a first subscription and an orientation of a second beam of the first subscription, applying the rotation angle to a first beam of a second subscription to identify a second beam of the second subscription, and performing a tune-away operation comprising tuning a radio frequency (RF) resource of the multi-subscription wireless device to the second subscription and configuring spatial filter parameters of an antenna array to communicate via the identified second beam of the second subscription.

Managing beam selection for a multi-subscription wireless device

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first subscriber identity module (SIM) of a user equipment (UE) may detect that the UE is operating in a high mobility environment. The first SIM of the UE may transmit, to a second SIM operating in an idle mode, an indication that the UE is operating in the high mobility environment and an indication of a first frequency error estimation associated with the first SIM. The second SIM of the UE may operate in a high mobility mode using a second frequency error estimation that is based at least in part on the first frequency error estimation associated with the first SIM. Numerous other aspects are described.

Optimized multiple subscriber identity module mode in high mobility environments

Certain aspects of the present disclosure relate to methods and apparatus for saving power while performing radio access technology measurements. An exemplary method that may be performed by user equipment (UE) includes obtaining a configuration indicating a measurement gap for the UE to measure one or more non-serving cells, wherein the UE does not receive data transmissions from a serving cell during the measurement gap, deciding not to measure the non-serving cells during a period including at least a portion of the measurement gap, and deactivating a receive chain of the UE during the period.

Intelligent power saving during active voice/data call

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may receive a priority list associated with preferred radio frequencies from a serving base station. In certain aspects, each radio frequency of the preferred radio frequencies associated with a first set of base station may operate on a first RAT. In certain other aspects, the apparatus may determine if the UE is able to reselect to the first RAT. In certain other aspects, the apparatus may perform a rank-based cell reselection procedure based on signal strength when the UE is unable to reselect to the first RAT.

Switching from a priority-based reselection mechanism to a rank-based reselection mechanism

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may measure a power value for each beam from one or more cells and calculate an average beam power for each cell. The UE may transmit these calculated averages to a base station in a report, and the base station may select a cell for communications based on the measurement report. The UE may also include a number indicating how many beams are used when calculating an average beam power, a ratio between a maximum and minimum beam power for each cell, two average beam powers based on two defined thresholds, or a combination of these measurements, in the transmitted report. The UE may add a bias to the average beam power for a particular cell to indicate a preference for that cell over the other candidate cells.

Cell quality measurement reporting for cells with mismatched beam numbers

Minimizing conflicts between different radio access technologies (RATs) is disclosed herein which include monitoring, by a user equipment (UE), a first use of a UE Radio Frequency (RF) resource by a first Radio Access Technology (RAT). The UE monitors a second use of the UE resource by a second RAT. The UE is served by a current serving cell in the second RAT. The UE may also determine a percentage of conflict between a first use of a UE resource by a first RAT and the second use of the UE resource by the second RAT over a predefined period of time, and initiating, by the UE, a cell reselection attempt to one or more neighboring cells of a plurality of neighboring cells serving the second RAT based on the determined percentage of conflict exceeding a predetermined threshold.

Method and apparatus for minimizing/avoiding conflicts between different radio access technologies serving user equipment

A method for authenticating a circuit switched (CS) call on a virtual subscriber identity module (VSIM) includes: authenticating the VSIM for a packet switched (PS) call connection using authentication information obtained from a remote server through a software subscriber identity module (soft-SIM) connection to the remote server; initiating a call connection on a CS radio access technology (RAT) between the VSIM and a first communication network; and authenticating the VSIM CS call connection to the first communication network through the VSIM PS connection in response to an authentication request for the call connection on the CS RAT.

Optimal tune away scheme for circuit switched calls on virtual subscriber identity module

Methods and apparatuses are provided for synchronizing security parameters between access terminals and a wireless network. An access terminal and network entity can conduct a security mode procedure where the access terminal sends a security mode complete message to the network entity. On receipt of the security mode complete message, the network entity may update to new security parameters. The access terminal may initiate a mobility procedure while the security mode procedure is ongoing and may, as a result, abort the security mode procedure and revert back to the old security parameters. The access terminal can send a mobility update message to the network entity including a dedicated status indicator adapted to inform the network entity that the access terminal has reverted back to the old security parameters. In response to the mobility update message, the network entity may revert back to the old security parameters.

Methods and apparatuses facilitating synchronization of security configurations

Examples described herein relate to managing communications on a first subscription and a second subscription of a multi-Subscriber Identity Module (SIM) wireless communication device via a Radio Frequency (RF) resource, including, but not limited to, tuning the RF resource away from the second subscription to the first subscription, detecting a network-set activation state of a secondary cell associated with the first subscription, and adjusting the activation state of the secondary cell based on the network-set activation state.

HS-SCCH order recovery in multi-subscriber identity module (SIM) wireless communication devices

Disclosed are methods and apparatus for detecting mismatch of ciphering parameters, such as Count-C, in a wireless device and recovery therefrom. The methods and apparatus for detection include examining a predefined ciphered field, such as a Length Indicator field, in one or more received Radio Link Control (RLC) Protocol Data Units (PDUs). Next, a determination of when the field is invalid over a predetermined sample number of PDUs is performed. Mismatch of ciphering parameters can then be determined when a predetermined number of samples of the field detected as invalid exceed a predetermined threshold. Additionally, recovery of PDUs after mismatch detections is disclosed using a range of Hyper-Frame Numbers (HFNs) to decipher buffered PDUs, and then check which of the HFNs eliminate the parameter mismatch by again determining if parameter mismatch occurs using the methods and apparatus for detection.

Mechanisms for detection of and recovery from ciphering parameter mismatch on communication networks

Various embodiments for conducting a public land mobile network (PLMN) search for a plurality of radio access technologies (RATs) on a mobile communication device may include profiling a frequency space to identify one or more frequency bands that may be utilized by one of the plurality of RATs and determining, according to a priority ordering of the plurality of RATs, a RAT that utilizes each identified frequency band. The mobile communication device may add, for each RAT in the plurality of RATs, the identified frequency bands utilized by each RAT to exclude lists associated with other RATs in the plurality of RATs. The mobile communication device may then conduct a PLMN search for each RAT in the plurality of RATs utilizing the exclude lists associated with each RAT.

Conducting public land mobile network (PLMN) searches in a multi-radio access technology (RAT) environment

A method for improving data throughput on a subscription includes: filtering data traffic throughput on a first subscription; comparing the filtered data traffic throughput to a threshold data rate; determining if the filtered data traffic throughput is greater than a threshold data rate value; and in response to a determination that the filtered data traffic throughput is equal to or less than the threshold data rate value, determining whether a tune away (TA) mode different than a first TA mode increases data traffic throughput on the first subscription.

Enhanced mechanism to achieve better throughput in X+GSM MSMS devices

A method includes receiving a dormancy request from an application executing at a communication device. In response to the dormancy request, a message is sent from the communication device to a radio network controller. The message indicates that a data session has ended. After expiration of a time period following sending of the message, state information is provided to the application. The state information indicates whether the communication device is in a low-power state.

User device dormancy

Various embodiments include methods for scheduling reception activities on a wireless communication device having a first receive chain and a second receive chain. Various embodiments may include identifying a first reception activity and a second reception activity of a first subscription scheduled on the first receive chain, in which a duration of the second reception activity is longer than a duration of the first reception activity. The wireless communication device may determine whether the first reception activity and the second reception activity can be performed concurrently on the first receive chain, and schedule the second reception activity on the second receive chain in response to determining that the first reception activity and the second reception activity cannot be performed concurrently on the first receive chain.

Scheduling receive chain activities on a mobile device

An apparatus and a method are provided for improving user experience in a multi-radio access bearer (multi-RAB) wireless communication system. After a user equipment establishes a circuit-switched communication link and a packet-switched communication link with a core network, it may receive an indication of an error associated with the packet-switched communication link. Here, if the value of a timer such as the RAB re-establishment timer T314 has a predetermined value (e.g., 0), the user equipment may release the packet-switched communication link, and maintain the circuit-switched communication link. The packet-switched communication link may then be re-established. In this fashion, errors that may occur on the data call need not interrupt a voice call.

Apparatus and method for maintaining a circuit-switched voice call in a multi-RAB wireless communication system in an area of weak coverage

Growing community of inventors

Hyderabad Telangana, India

Suresh Sanka