Qualcomm Incorporated

Srinivasan Rajagopalan

Ashish Shankar Iyer

Vasanth Kumar Ramkumar

Arvind Vardarajan Santhanam

Daniel Amerga

Cheol Hee Park

Deepak Krishnamoorthi

Shailesh Maheshwari

Naveen Kumar Pasunooru

Kuo-Chun Lee

Srinivasan Balasubramanian

Reza Shahidi

Liangchi Hsu

Sivaramakrishna Veerepalli

Ralph Akram Gholmieh

Bao Vinh Nguyen

Prashanth Hosabettu Mohan

Gang Xiao

Amit Mahajan

Scott Hoover

Feng Lu

Subramanya P Rao

KrishnaKumar Vasanthasenan

Muralidharan Murugan

Sean Vincent Maschue

Pankaj Shivcharan Gupta

Raevanth Venkat Annam

Ramchandran Srinivasan

Pratik Kotkar

Alberto Rico Alvarino

Alexei Yurievitch Gorokhov

Shailesh Patil

Tien Viet Nguyen

Muthukumaran Dhanapal

Jon James Anderson

Parthasarathy Krishnamoorthy

Nagaraju Naik

Thadi Manjunath Nagaraj

Hongbo Yan

Chun-Hao Hsu

Feilu Liu

Nitin Pant

Navid Ehsan

Jack Shyh-Hurng Shauh

Dominique Francois Bressanelli

Jeffrey A Niemann

Kiran Patil

Vijay Marwah

Pavan Kaivaram

Abhijit Navalekar

Omesh Kumar Handa

Zhibin Dang

Christopher L Medrano

Thomas James Christol

Mohan Krishna Gowda

Cheng Tan

Praveen Kumar Appani

Nermeen Ahmed Bassiouny

Yuanbo Wang

Hamza Ijaz Abbasi

Srivatsa Venkata Chivukula

Adrian J Prentice

Praveen Kona

Anindya Majumder

Taoufik Tani

Marc Azar

Sagar Kakade

Alexey Semjonovs

Vijay Raman

Anand Chowdhary Kolluri

Brandon Allen Burdge

Vaibhav Singhal

Santosh Kumar Rongala

Giridhar Ramakrishnan

Yunsong Mu

Amisha Sheth

Yax Patel

Kevin Shaokwan Wang

Praveen N Kona

Aparna S Ghorpade

Ning Yin

Sachin Saraswat

Prashanth Mohan

Krishnakumar Vasanthasenan

Pankaj Gupta

Christopher Lee Medrano

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may adjust a basic safety message generation periodicity based at least in part on a semi-persistent scheduling periodicity for transmitting basic safety messages. The UE may generate one or more basic safety messages based at least in part on the adjusted basic safety message generation periodicity. Numerous other aspects are provided.

Techniques for reducing semi-persistent scheduling latency

A method, an apparatus, and a non-transitory computer readable medium for receiving data and one or more redundant equivalent versions of the data from a remote user equipment (UE), buffering the data and the one or more redundant equivalent versions of the data, transmitting the data to a base station, receiving at least one negative acknowledgement, relating to the data, from the base station indicating an unsuccessful reception of the data; and transmitting, in response to receiving the at least one negative acknowledgement, at least one of the one or more redundant equivalent versions of the data to the base station.

Enhanced internet of things relay data re-transmission

Aspects of the present disclosure provide techniques to enable enhanced machine type communication (s) (eMTC) and/or narrowband Internet-of-Things (NB-IoT) devices to transition to idle mode after releasing a connection, such as a radio resource control (RRC) connection, more quickly than with previously known techniques. An example method includes determining, based on an indication received in a narrowband signal on a narrowband region of a bandwidth comprising a plurality of narrowband regions, whether to wait for a delay period, determined based on a configuration received from a network entity, before releasing a radio resource control (RRC) connection and releasing the RRC connection at a time in accordance with the determination.

Enhanced machine type communications quick idle transition after connection release

Aspects directed towards synchronizing out of coverage (OOC) vehicle-to-everything (V2X) communications are disclosed. In one example, a scheduled entity detects a loss of a synchronization signal associated with a V2X communication by detecting when a timing uncertainty value or error value is greater than a threshold value. Packet timing information is then received in response to the loss of the synchronization signal from at least one user equipment (UE) synchronized with the synchronization signal. The scheduled entity then maintains the V2X communication by performing a timing adjustment based on the packet timing information.

Cellular vehicle-to-everything out of coverage synchronization

A method, apparatus, and computer-readable medium at a transmitting user equipment (UE) in a distributed cellular vehicle-to-everything environment are disclosed to determine a schedule for transmissions on subchannels of multiple frequencies based on a set of UE-specific, dynamic, and performance related metrics or criteria. The metrics may include an estimated number of users on a subchannel, a best-bandwidth fit, channel loading conditions, transmission range, and quality requirements of an application, among others. Such a schedule for transmissions on subchannels of multiple frequencies may result in either an improved capacity utilization, an improved communication quality, or both.

Methods and apparatuses for transmission scheduling on multiple frequencies

Methods and apparatus for selection of radio access technology (RAT) based on device usage patterns are provided. A User Equipment (UE) obtains information relating to one or more Quality of Service (QoS) metrics for communication of data by the UE. The UE designates a Radio Access Technology (RAT) from a plurality of available RATs as a preferred RAT for the communication, based on the obtained information.

Radio access technology (RAT) selection based on device usage patterns

Device-to-device operations are scheduled based on receive and transmit pools that may have a conflict in time domain. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for resolving time domain conflict in device-to-device communication are provided. The apparatus may compute a first block rate metric for a first device-to-device communication on a first frequency and a second block rate metric for a second device-to-device communication on a second frequency. The apparatus may detect a time-domain conflict between the first device-to-device communication on the first frequency and the second device-to-device communication on the second frequency. The apparatus may prioritize the first device-to-device communication on the first frequency and the second device-to-device communication on the second frequency based on the first block rate metric and the second block rate metric.

Method and apparatus for resolving time domain conflict in device-to-device communication

Examples described herein relate to managing communications for a first subscription and a second subscription of a wireless communication device, including, but not limited to, determining collision between activities of the first subscription over a first RAT and activities of the second subscription over a second RAT and reselecting from the second RAT to a third RAT for the second subscription.

Collision avoidance in multi-subscriber identity module (SIM) wireless communication devices

Certain aspects of the present disclosure provide techniques for defending against false semi-persistent scheduling (SPS) activation detection and/or missed SPS release. According to certain aspects, a user equipment (UE) may detect one or more conditions for a semi-persistent scheduling (SPS) activation or release are met based on a downlink transmission, generate one or more metrics related to downlink transmission, and determine a valid SPS activation or release has occurred if the one or more metrics satisfy one or more criteria. According to certain aspects, a UE may determine a valid semi-persistent scheduling (SPS) activation has occurred, detect a number of PDSCH CRC failures, and implicitly declare an SPS release based on the detection.

Defense against false detection of semi-persistent scheduling (SPS) activation or release

Embodiments include methods implemented by a processor of a mobile communication device for managing tune-aways by a radio frequency resource supporting a first subscription to support a second subscription. The processor may determine a data loss ratio of the data of a media file that is lost in transmission to the mobile communication device. The processor may compare the data loss ratio of the data to a first data loss ratio threshold and a second data loss ratio threshold, and the processor may block a tune-away event of the radio frequency resource from the first subscription to the second subscription in response to determining that the data loss ratio of the data is greater than the first data loss ratio threshold and less than the second data loss ratio threshold.

Evolved multimedia broadcast multicast service (eMBMS) streaming loss control in a radio sharing concurrent radio access technology (RAT) capable mobile device

Certain aspects of the present disclosure relate to techniques and apparatus for a user equipment (UE) to delay RLC retransmissions (e.g., during off-durations, including CDRX off-durations). According to aspects of the present disclosure, a UE may delay triggering an RLC retransmission of an RLC PDU until after a next opportunity for the UE to receive an RLC ACK of the RLC PDU. By delaying RLC retransmissions, a UE may be prevented from waking up from one or more CDRX off-durations and using power associated with waking up from the one or more CDRX off-durations.

Delaying radio link control retransmissions

In device-to-device (D2D) communication in a licensed spectrum, selection of a transmit pool and distribution of codes to be transmitted to the transmit pools for more efficient transmission is desired, for a given period. The apparatus may a user equipment (UE) for D2D communication in a licensed spectrum. The UE sets a discovery epoch to a shortest discovery period among discovery periods of a plurality of transmit resource pools, each transmit resource pool of the plurality of transmit resource pools associated with a respective frequency. The UE estimates a channel utilization of each transmit resource pool of the plurality of transmit resource pools based on one or more previous transmissions on each transmit resource pool of the plurality of transmit resource pools. The UE selects a transmit resource pool among the plurality of transmit resource pools for a D2D transmission within the discovery epoch based on the estimated channel utilizations.

Methods for TxPool selection for LTE-D code transmission

Techniques for optimized cell acquisition for long term evolution (LTE) time division duplex (TDD) systems or closed subscriber group (CSG)/evolved Multicast Broadcast Multimedia Service (eMBMS) capable user equipments (UEs) are disclosed. A UE obtains configuration information, CSG capability information, and/or eMBMS capability information for a cell. The UE also stores the obtained information for the cell in a cell information database. In some aspects, the UE may employ the CSG and/or eMBMS capability information to select a weaker cell, during initial frequency scan at power up of the UE, based on cell capability. Additionally or alternatively, the UE may employ the configuration information to determine an initial mutual information (Mi) hypothesis value for physical hybrid-automatic repeat request (HART) indicator channel (PHICH) group mapping of the cell. Additionally or alternative, radio link failures and/or out of synch events may be predicted and proactive responses employed based on previously obtained solutions.

Optimized cell acquisition for LTE TDD systems or CSG/eMBMS capable UEs

Methods, systems, and devices are described for managing power of a user equipment (UE). A UE modem may determine the state of charge of the battery to determine that the battery is in one of two or more charge state levels, and may invoke one or more modem power saving modes based on the charge state level. Power saving modes may include, for example, reducing a number of available receive chains in a UE, initiating a time delay between one or more frequency scan requests performed by the UE, reducing a rate of neighbor search requests performed by the UE, providing a buffer status report (BSR) parameter that indicates a reduced amount of buffer data relative to an actual amount of buffer data for the UE, and/or adjusting a maximum transmit power level for an uplink channel.

Methods and apparatus for reducing modem power based on a present state of charge of battery

Growing community of inventors

San Diego, CA, United States of America

Srinivasan Rajagopalan