Patents by Inventor Durga Prasad Malladi

Durga Prasad Malladi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190246422
    Abstract: Techniques are described for wireless communication. A first method includes transmitting a first signal to indicate accessing a first channel in a radio frequency spectrum band, and transmitting information with the first signal in the radio frequency spectrum band. A second method includes winning contention to access a radio frequency spectrum band, and after the winning contention to access the radio frequency spectrum band, transmitting a first signal to align a starting point of a second signal with a reference boundary associated with the radio frequency spectrum band. A third method includes winning contention to access a radio frequency spectrum band during a first frame period, the first frame selected from a plurality of different frame periods, and transmitting a signal at a periodicity during one or more subframes of the first frame period for each of the plurality of different frame periods.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 8, 2019
    Inventors: Tao Luo, Shimman Arvind Patel, Wanshi Chen, Naga Bhushan, Yongbin Wei, Hao Xu, Aleksandar Damnjanovic, Tingfang Ji, Durga Prasad Malladi, Srinivas Yerramalli, Peter Gaal
  • Patent number: 10375713
    Abstract: A framework to manage coexistence of multiple technologies over multiple channels is desired. The apparatus may be a user equipment (UE). The UE detects whether a second technology different from a first communication technology utilized by the UE is active on a first channel. The UE performs, based on the detection, an action associated with assigning the first communication technology to at least one of the first channel or a second channel.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: August 6, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Kapil Gulati, Gaurav Gupta, Shailesh Patil, Durga Prasad Malladi, Sudhir Kumar Baghel, Marco Papaleo
  • Publication number: 20190239227
    Abstract: Techniques are described for wireless communication. A first method includes winning a contention for access to an unlicensed radio frequency spectrum band, and transmitting at least a portion of a channel usage beacon signal (CUBS) over the unlicensed radio frequency spectrum band. The at least portion of the CUBS is transmitted in a number of frequency interlaces of the unlicensed radio frequency spectrum band. A second method includes winning a contention for access to an unlicensed radio frequency spectrum band; determining whether the contention is won within a threshold time before a next symbol period boundary; and transmitting at least a portion of a CUBS over the unlicensed radio frequency spectrum band. The at least portion of the CUBS is transmitted during a preamble including a fractional period of a first symbol period. The at least portion of the CUBS may be based at least in part on the determining.
    Type: Application
    Filed: April 12, 2019
    Publication date: August 1, 2019
    Inventors: Peter Gaal, Srinivas Yerramalli, Durga Prasad Malladi, Naga Bhushan, Yongbin Wei, Tao Luo, Hao Xu, Wanshi Chen, Shimman Arvind Patel, Aleksandar Damnjanovic, Xiaoxia Zhang
  • Patent number: 10368374
    Abstract: Improvements to signaling procedures for use in physical random access channel (PRACH)-based proximity detection are disclosed. Signaling and signaling processes from a serving base station may trigger a more efficient and reliable transmission of PRACH from related user equipment (UE). At the dynamic power nodes (DPNs) monitoring for such PRACH-based proximity, features are disclosed which establish neighbor lists for more efficient management of detection and proximity activation.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: July 30, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Hao Xu, Vikas Jain, Durga Prasad Malladi, Awaiz Ahmad Khan, Samatha Kotla, Balwinderpal Sachdev
  • Patent number: 10368353
    Abstract: Methods and apparatuses for adaptive subcarrier spacing in wireless communication networks are described. For example, the described aspects include transmitting, from the UE to a network entity, a first PRACH transmission with a first subcarrier spacing; determining, by the UE, that the first PRACH transmission to the network entity is not successful; and transmitting, from the UE, a second PRACH transmission with a second subcarrier spacing in response to determining that the first PRACH transmission is not successful, wherein the first subcarrier spacing is different from the second subcarrier spacing.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: July 30, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Hung Ly, Hao Xu, Wanshi Chen, Peter Gaal, Tingfang Ji, Durga Prasad Malladi
  • Patent number: 10362487
    Abstract: Long term evolution (LTE)/LTE-Advanced (LTE-A) deployments with unlicensed spectrum leverage more efficient LTE communication aspects over unlicensed spectrum, such as over WIFI radio access technology. In order to accommodate such communications, various downlink procedures may be modified in order to handle communications between licensed and unlicensed spectrum with LTE/LTE-A deployments with unlicensed spectrum.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: July 23, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Peter Gaal, Durga Prasad Malladi, Tao Luo, Aleksandar Damnjanovic, Naga Bhushan, Tingfang Ji, Yongbin Wei
  • Patent number: 10362575
    Abstract: Techniques for wireless communications over a shared radio frequency spectrum band, may include techniques for transmitting uplink data transmissions using allocated uplink resources. Allocated uplink resources may include an uplink channel comprising a number of allocated interlaces of resource blocks (RBs) for use by a user equipment (UE). An incoming data stream may be processed and data separated into each of the allocated interlaces of RBs for the UE. Such separation may be through demultiplexing the data stream to obtain data for the allocated interlaces of RBs. The demultiplexed data may be mapped onto associated resource elements associated with the allocated interlaces of RBs, and transmitted. Different types of uplink channels, such as a physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH) and/or a physical random access channel (PRACH) may be allocated to interlaces of RBs in one or more subframes of a transmitted radio frame.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: July 23, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Yongbin Wei, Durga Prasad Malladi, Tao Luo, Srinivas Yerramalli, Aleksandar Damnjanovic, Hao Xu, Peter Gaal, Wanshi Chen
  • Patent number: 10356807
    Abstract: Techniques are described for wireless communication. A first method may include inserting, in a first transmission using a first radio access technology (RAT), a channel occupancy identifier for a second transmission using a second RAT. The first method may also include transmitting the first transmission having the channel occupancy identifier over an unlicensed radio frequency spectrum band. A second method may include receiving, at a receiver operated using a first RAT, a channel occupancy identifier for a transmission using a second RAT. The channel occupancy identifier may be received over an unlicensed radio frequency spectrum band. The second method may also include decoding the channel occupancy identifier to identify a backoff period, and refraining from accessing the unlicensed radio frequency spectrum band using the first RAT based at least in part on the identified backoff period.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Yerramalli, Aleksandar Damnjanovic, Kiran Kumar Somasundaram, Tao Luo, Onkar Jayant Dabeer, Durga Prasad Malladi, Naga Bhushan, Yongbin Wei, Peter Gaal, Wanshi Chen, Anastasios Stamoulis, Hao Xu, Xiaoxia Zhang
  • Patent number: 10349403
    Abstract: In wireless communication systems that support 5G or NR protocols, subframes used for communication may have different numerology options. Numerology options may refer to the characteristics of the subframe such as a tone spacing within each symbol of the subframe, a symbol duration for each symbol of the subframe, a number of symbols in the subframe, etc. A subframe may include a control channel (e.g., the PDCCH) and a data channel (e.g., the PDSCH). In an aspect, the control channel and the data channel within the subframe may have different numerologies. As such, a need exists to signal the numerology of the subframe to users and to determine whether and how to multiplex the control channel and the data channel into the subframe.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: July 9, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Navid Abedini, Tao Luo, Sundar Subramanian, Muhammad Nazmul Islam, Bilal Sadiq, Ashwin Sampath, Juergen Cezanne, Junyi Li, Krishna Kiran Mukkavilli, Durga Prasad Malladi, Ozge Koymen, Atul Maharshi
  • Patent number: 10341914
    Abstract: Antenna selection and reassignment in multiple radio access technology (RAT) communication systems with unlicensed spectrum is disclosed. Aspects include a user equipment (UE) monitoring for a channel reserving signal in each frame from multiple transmission sources. If no channel reserving signal is detected, then the UE reassigns one or more of the antennas previously assigned to the transmission sources with no activity detected. Additional aspects include base stations that determine a clear channel assessment (CCA) status for each of unlicensed carrier designated for transmission to a UE. The base station will transmit a receive antenna usage adjustment signal to the UE based on the determined CCA status.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: July 2, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Tao Luo, Durga Prasad Malladi, Xiliang Luo, Yongbin Wei
  • Patent number: 10341890
    Abstract: Channel state information (CSI) feedback in long term evolution (LTE) and LTE-Advanced (LTE-A) networks including contention-based shared unlicensed spectrum is disclosed in which a user equipment (UE) identifies at least one carrier utilizing a contention based radio frequency spectrum. The UE detects a transmission signal indicative of clear channel assessment (CCA) result information for the carrier and determines whether a reference signal for channel state information measurement is present in a subframe based on the detected transmission signal. The UE would transmit a measurement report based on this presence determination of the reference signal.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: July 2, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Tao Luo, Peter Gaal, Durga Prasad Malladi, Srinivas Yerramalli, Yongbin Wei, Hao Xu, Tingfang Ji, Naga Bhushan, Aleksandar Damnjanovic
  • Patent number: 10341042
    Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may use a sampling rate that is less than a default sampling rate associated with a wireless carrier. The device may operate in a narrowband portion of a system bandwidth, and the sampling rate may be less than that used by devices monitoring the whole bandwidth. Multiple sampling rates may be used so that a portion of signal processing may be associated with one sampling rate and another portion of the signal processing may be associated with another sampling rate. The size of a cyclic prefix (CP) may be adjusted based on the sampling rate to align subframe timing boundaries for signals of different sampling rates. In some cases, each symbol of a signal may include both a CP and a postfix such that the postfix for each symbol overlaps the prefix of the next symbol.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: July 2, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jing Lei, Hao Xu, Yongbin Wei, Durga Prasad Malladi, Peter Gaal
  • Patent number: 10342043
    Abstract: Methods, systems, and devices are described contention-based channel access procedures that may enhance efficiency in communications using unlicensed spectrum. A time period may be identified during which base stations perform contention-based downlink channel access procedures for access to a channel in an unlicensed spectrum. The base stations may be coordinated such that different base stations may seek channel access during different time intervals during the time period. Contention-based uplink channel access procedures for UEs may then be modified to favor one or more UEs that are associated with a base station that has won channel access.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: July 2, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Naga Bhushan, Aleksandar Damnjanovic, Tingfang Ji, Peter Gaal, Durga Prasad Malladi
  • Publication number: 20190199564
    Abstract: Certain aspects of the present disclosure provide techniques for hierarchical communication for device-to-device (D2D) communications. In certain aspects, a method generally includes determining user equipment (UE) data comprising at least one of one or more parameters about the UE, one or more parameters about objects near the UE, or raw sensor data. The method further includes determining a first level for transmitting a first portion of the UE data based on content of the first portion of the UE data. The method further includes determining a first modulation coding scheme associated with the first level based on a mapping of a plurality of levels to a plurality of modulation coding schemes. The method further includes encoding the first portion of the UE data using the first modulation coding scheme and transmitting the first portion of the UE data from the UE to at least one second UE directly.
    Type: Application
    Filed: December 17, 2018
    Publication date: June 27, 2019
    Inventors: Libin JIANG, Sudhir Kumar BAGHEL, Kapil GULATI, Tien Viet NGUYEN, Shailesh PATIL, Junyi LI, Durga Prasad MALLADI
  • Publication number: 20190199504
    Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may identify a set of power configurations for a plurality of communications with at least one target device. The set of power configurations may be based at least in part on a type of signal, a type of channel, a parameter of the wireless device, a parameter of the target device, or a combination thereof. The wireless device may then determine a duplexing mode for the plurality of communications based at least in part on the set of power configurations. The duplexing mode may be, for example, a full duplex mode or a half-duplex mode. The wireless device may then transmit the plurality of communications to and/or receive the plurality of communications from the at least one target device according to the set of power configurations and the selected duplexing mode.
    Type: Application
    Filed: February 28, 2019
    Publication date: June 27, 2019
    Inventors: Navid Abedini, Sundar Subramanian, Junyi Li, Durga Prasad Malladi, Karl Georg Hampel, Muhammad Nazmul Islam
  • Publication number: 20190199786
    Abstract: Techniques for performing peer discovery in a wireless network are described. A device may perform peer discovery to detect and identify other devices of interest. In an aspect, the device may perform peer discovery based on a hybrid mode that includes autonomous peer discovery and network-assisted peer discovery. In another aspect, the device may perform peer discovery based on a push mode and a pull mode. For the push mode, the device may occasionally transmit and/or receive a peer detection signal. For the pull mode, the device may transmit and/or receive a peer discovery request when triggered. In yet another aspect, the device may perform event-triggered peer discovery (e.g., for the pull mode). In yet another aspect, the device may perform peer discovery using both a downlink spectrum and an uplink spectrum. In yet another aspect, the device may transmit a peer detection signal in a manner to improve detection and/or increase payload.
    Type: Application
    Filed: March 1, 2019
    Publication date: June 27, 2019
    Inventors: Siddhartha MALLIK, Ravi PALANKI, Durga Prasad MALLADI, Naga BHUSHAN
  • Patent number: 10326577
    Abstract: Methods, systems, and apparatuses are described for wireless communications. In one method, a sequence number corresponding to a data frame and one or more data subframes of the data frame may be transmitted over an unlicensed spectrum to a user equipment (UE), and hybrid automatic repeat request (HARQ) feedback for the one or more data subframes may be received over the unlicensed spectrum, from the UE, when the sequence number corresponding to the data frame is received by the UE in a specified order. In another method, a sequence number corresponding to a data frame and HARQ feedback may be transmitted over an unlicensed spectrum to a UE, and one or more data subframes may be received over the unlicensed spectrum, from the UE, in response to the HARQ feedback when the sequence number corresponding to the data frame is received by the UE in a specified order.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: June 18, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Aleksandar Damnjanovic, Naga Bhushan, Wanshi Chen, Durga Prasad Malladi, Yongbin Wei, Tao Luo, Tingfang Ji, Peter Gaal
  • Patent number: 10321392
    Abstract: Techniques are described for configuring wireless service for a user equipment (UE) in a wireless communications network in which the UE may be served over one or more of multiple available cells. Wireless service for the UE may be configured based on parameters associated with each of the multiple cells, such as, for example, a primary/secondary cell designation of a cell, whether the cell operates using a licensed or an unlicensed radio frequency spectrum band, a radio access technology associated with a cell, and/or an operating frequency band of a cell. Based on the parameters for each cell, one or more cell configurations for serving the UE may be provided. The cell configurations may identify, for example, a set of rules that control how much and/or what type of traffic is sent on different cells.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: June 11, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Miguel Griot, Gavin Bernard Horn, Durga Prasad Malladi
  • Publication number: 20190174532
    Abstract: Methods, systems, and devices for wireless communication are described. A base station may employ a multiplexing configuration based on latency and efficiency considerations. The base station may transmit a resource grant, a signal indicating the length of a downlink (DL) transmission time interval (TTI), and a signal indicating the length of a subsequent uplink (UL) TTI to one or more user equipment (UEs). The base station may dynamically select a new multiplexing configuration by, for example, setting the length of an UL TTI to zero or assigning multiple UEs resources in the same DL TTI. Latency may also be reduced by employing block feedback, such as block hybrid automatic repeat request (HARQ) feedback. A UE may determine and transmit HARQ feedback for each transport block (TB) of a set of TBs, which may be based on a time duration of a downlink TTI.
    Type: Application
    Filed: January 11, 2019
    Publication date: June 6, 2019
    Inventors: Jelena Damnjanovic, Taesang Yoo, Siddhartha Mallik, Aleksandar Damnjanovic, Arumugam Chendamarai Kannan, Madhavan Srinivasan Vajapeyam, Durga Prasad Malladi, Yongbin Wei, Tao Luo
  • Patent number: 10313916
    Abstract: Methods, systems, and devices are described for decreasing user plane latency in a wireless communication system. This may include routing a portion of bearer traffic to or from a UE through a local or serving gateway, or within or between base stations, rather than via the core network. In some examples, techniques for selected internet protocol flow ultra-low latency (SIPFULL) for systems in which users may have subscribed to enhanced services may be employed. The network may, for instance, authorize SIPFULL functionalities for UEs per access point name (APN) based on individual services subscribed by the UE to improve overall quality of service (QoS). In some examples, a UEs latency requirements or SIPFULL authorizations may affect mobility operations.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: June 4, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jun Wang, Ozcan Ozturk, Miguel Griot, Ravindra Manohar Patwardhan, Onkar Jayant Dabeer, Madhavan Srinivasan Vajapeyam, Jelena Damnjanovic, Aleksandar Damnjanovic, Taesang Yoo, Yongbin Wei, Durga Prasad Malladi