Qualcomm Incorporated

Feng Lu

Arvind Vardarajan Santhanam

Subramanya P Rao

Cheol Hee Park

Ashish Shankar Iyer

Anil Kumar Goteti

Parvathanathan Subrahmanya

Je Woo Kim

Scott Hoover

Prashant Udupa Sripathi

Jittra Jootar

Aditya Dua

Yuanbo Wang

Wei Zhang

Gang Xiao

Harish Venkatachari

Amit Butala

Srinivasan Rajagopalan

Yi Su

Mouaffac Ambriss

Uzma Khan Qazi

Hongsan Sheng

Thomas James Christol

Taoufik Tani

Yunsong Mu

Sudhir Kumar Baghel

Liang Zhao

Shailesh Patil

Raghu Narayan Challa

Aziz Gholmieh

Farhad Meshkati

Danlu Zhang

Sivaramakrishna Veerepalli

Joel Linsky

Ralph Akram Gholmieh

Yongle Wu

Youngjae Kim

Francis M Ngai

Feilu Liu

Nate Chizgi

Sharif Ahsanul Matin

Lei Xiao

Sundaresan Tambaram Kailasam

Krishna Chaitanya Mukkera

Sivaram Srivenkata Palakodety

Ting Kong

Gokhan Mergen

Sean Vincent Maschue

Vignesh Sethuraman

An-Swol Clement Hu

Jyothi Kiran Vattikonda

Guang Xie

Joshua Tennyson MacDonald

Hemanth Kumar Rayapati

Wei-Jei Song

Abhijit Navalekar

Young Geun Cho

Praveen Kumar Appani

Cheng Tan

Ravi Gopalan

Abhinav Gupta

Praveen Peruru

Haiqin Liu

Subramanya P N Rao

Tao Cui

Mutaz Shukair

Santosh Kumar Rongala

Giridhar Ramakrishnan

Satish Pavan Kumar Nichanametla

Li Sheng

Jimmy C Chui

Yax Patel

Scott Allan Hoover

Joshua Tennyson Macdonald

Wireless communications systems and methods related to wireless communications in a system are provided. A user equipment (UE) may determine a plurality of antenna configurations for a plurality of channel frequencies. The UE may determine a set of signal strengths for at least one beam received at one or more antenna configurations of the plurality of antenna configurations for at least one of the channel frequencies. The UE may select, based on the set of signal strengths, a first antenna configuration of the plurality of antenna configurations. After selection of the first antenna configuration, the UE may communicate with a base station, in one or more channel frequencies based on the first antenna configuration.

Antenna configuration selection for user equipment

Methods, systems, and devices for wireless communications are described. A user equipment (UE) and another device (e.g., another UE) may transmit messages on a shared channel accessed in a half-duplex manner (e.g., within a vehicle-to-everything (V2X) network). The UE and the other device may transmit messages on semi-persistently scheduled (SPS) resources. A message of the UE and a transmission of the other device may collide (e.g., be transmitted in the same subframe). The UE may employ muting and measuring, in which the UE may refrain from transmitting on a SPS resource and may detect the transmission of the other device. Upon detection of other transmissions, the UE may perform resource reselection. During resource selection or resource reselection, the UE may exclude an entire subframe of candidate resources if one of the candidate resources of the subframe is mapped to a resource associated with a transmission from another device.

Collision avoidance of half-duplex resource selection

Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to mechanisms for enhancing pedestrian to vehicle (P2V) communications. For example, a pedestrian user equipment (P-UE) may detect a change in at least one of: location or motion of the UE adjust, based on the detection, behavior of one or more features of the UE related to P2V transmissions.

Enhancements to pedestrian to vehicles (P2V) communications

Aspects of the present disclosure implement techniques that allow a vehicle performing V2X communications to provide more accurate S-RSSI measurements and CBR calculations for use in channel selection and congestion control. Techniques may include measuring a sidelink received signal strength indicator (S-RSSI) for each of a plurality of sub-channels, determining one or more signal impairment adjustment factors based on the S-RSSI for each of the plurality of sub-channels, calculating a channel busy ratio (CBR) for the plurality of sub-channels based on the one or more signal impairment adjustment factors, and initiating communication with at least one of the plurality of sub-channels based on at least the CBR.

Sidelink signal measurement and resource selection in vehicle-to-everything communications

Aspects of the disclosure relate to mechanisms for a user equipment for indicating resources having limited wireless wide area network (WWAN) transmission capability. In some examples, a user equipment indicates a sidelink transmission pattern to a WWAN, receives one or more uplink transmission grants for the WWAN based on at least the sidelink transmission pattern, and transmits at least one of first data to a second user equipment on a sidelink channel based on the sidelink transmission pattern or second data to the WWAN based on the one or more uplink transmission grants. In some examples, the user equipment transmits a sidelink transmission configuration to the WWAN, the sidelink transmission configuration including one or more sidelink transmission patterns. In some examples, the user equipment selects a sidelink transmission pattern from among the one or more sidelink transmission patterns based on expected sidelink transmissions.

Communication of sidelink transmission pattern to wireless wide area network (WWAN)

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

Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a limit on a number of resource blocks (RBs) permitted to be used for a vehicle-to-everything (V2X) transmission by the UE; may determine, based at least in part on the limit, one or more parameters for the V2X transmission, wherein the one or more parameters include at least one of a modulation and coding scheme (MCS) for the V2X transmission, a number of transport blocks (TBs) for the V2X transmission, a number of RBs per TB for the V2X transmission, or a retransmission configuration for the V2X transmission; and may transmit the V2X transmission based at least in part on the one or more parameters. Numerous other aspects are provided.

Techniques and apparatuses for autonomous resource selection for vehicle-to-everything (V2X) transmissions

Cell reselection for transitioning a user device from a macro cell to a small cell may be performed by comparing a first reselection candidate small cell and a second reselection candidate small cell based on reselection criteria, and selecting a final reselection candidate based on the comparison.

Inter-RAT and intra-RAT small cell reselection

Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive sidelink control information (SCI) associated with a remote vehicle; identify a threat metric associated with the remote vehicle based at least in part on one or more characteristics of the remote vehicle, wherein the one or more characteristics are determined based at least in part on vehicle information received in one or more transport blocks corresponding to prior SCI associated with the remote vehicle and received prior to the SCI; and process the SCI based at least in part on the threat metric. Numerous other aspects are provided.

Techniques and apparatuses for prioritizing vehicle-to-everything (V2X) communication messages based on threat level estimation

Aspects of the disclosure are directed to estimating a signal to interference ratio. A signal energy estimate corresponding to a received data transmission is generated. A noise to interference ratio estimate corresponding to the received data transmission is generated. A bias, corresponding to the noise to interference ratio estimate, is subtracted from the signal energy estimate. A signal to interference ratio estimate is determined corresponding to the signal energy estimate less the bias, and the noise to interference ratio estimate.

Apparatus and method for sire bias compensation

A wireless user equipment device transmits a control channel and a data channel. Each of the control channel and the data channel include a plurality of time slots. The control channel is configured to transmit control information and includes both transmission time slots and non-transmission time slots. The data channel is configured to transmit data packets. The device further includes a processor configured to schedule at least one data packet for transmission in at least one data channel time slot that is concurrent to at least one control channel transmission time slot, and a transmission module configured to transmit the at least one data packet in the at least one data channel time slot that is concurrent to the at least one control channel transmission time slot.

Transmission scheduling optimization method and wireless user equipment device

Methods and apparatus for wireless communications are described. A method of wireless communications includes determining an energy for a first signal received at a first finger of a rake receiver after a reference signal is received at a second finger of the rake receiver, determining an energy for a second signal received at a third finger of a rake receiver before the reference signal is received at the second finger of the rake receiver, and selecting the first signal as a new reference signal when the energy of the first signal exceeds the energy of the second signal by a predefined threshold amount. In another aspect, a method includes assigning a signal received at a rake receiver to a finger of the rake receiver, and deassigning the finger if the signal has an energy level below a preselected lock threshold energy for a predefined time.

On cell/finger assignment for reduced cell delay spread

At least one feature pertains to a method of communication that comprises aligning a measurement task that utilizes a resource within a user equipment, such that at least a portion of the measurement task is performed during a time that the resource is enabled in the user equipment, and executing the measurement task during the time that the resource is enabled in the user equipment. In one example, the measurement task may be a searcher task, the resource may comprise receiver circuitry, and the time that the resource is enabled corresponds to a DRX monitoring interval of a downlink channel, such as a high speed shared control channel. By aligning and executing the searcher task during the time that the resource is enabled in the user equipment, searcher overhead may be reduced. Reducing searcher overhead allows the user equipment to save power by disabling the receiver circuitry.

System and method for reducing overhead of searcher tasks for discontinuous reception

An apparatus and method for mitigation of receive power imbalance including estimating input power levels on two diversity receive branches in a receiver; computing a power imbalance between the two diversity receive branches and determining a weaker receive branch; setting a weakRX parameter based on the weaker receive branch; computing an intercept parameter cfor a switching curve based on the weakRX parameter; computing a threshold T based on the intercept parameter; and determining a switching decision for the receiver based on the threshold T.

Apparatus and method for mitigation of receive power imbalance on equalizer performance

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Santa Clara, CA, United States of America

Feng Lu