Patents by Inventor Kapil Bhattad

Kapil Bhattad 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).

  • Patent number: 10469158
    Abstract: There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine a bandwidth for narrowband communications. The apparatus may determine a narrowband TDD frame structure for the narrowband communications. In one aspect, the narrowband TDD frame structure may include at least one of two or more contiguous downlink subframes, or one or more flexible subframes that can be configured as either a downlink subframe or an uplink subframe. The apparatus may communicate with a UE using the narrowband TDD frame structure determined for the narrowband communications.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: November 5, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Arvind Sridharan, Kapil Bhattad, Manikandan Chandrasekar, Gowrisankar Somichetty, Alberto Rico Alvarino, Xiao feng Wang
  • Patent number: 10469159
    Abstract: There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine a TDD mode for narrowband communications. The apparatus may determine a TDD frame structure for the narrowband communications from a group of narrowband TDD frame structures. In one aspect, at least one common subframe in each narrowband TDD frame structure in the group of narrowband TDD frame structures may be configured as a downlink subframe. The apparatus may transmit a PSS using the at least one common subframe in the narrowband TDD frame structure determined for the narrowband communications.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: November 5, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Arvind Sridharan, Kapil Bhattad, Manikandan Chandrasekar, Gowrisankar Somichetty, Alberto Rico Alvarino, Xiao feng Wang
  • Patent number: 10462629
    Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may receive a scheduling indicator on a first instance of a control channel. The wireless device may determine that a data transmission is scheduled for the wireless device based at least in part on the received scheduling indicator. The wireless device may identify a first frequency band associated with the data transmission and a second frequency band associated with a second instance of the control channel. The wireless device may identify a third frequency band to monitor based at least in part on the first and second frequency bands and a bandwidth capability of the wireless device. The third frequency band includes the first frequency band. The third frequency band comprises an associated bandwidth that is based at least in part on the bandwidth capability of the wireless device.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: October 29, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Kapil Bhattad, Gowrisankar Somichetty, Alberto Rico Alvarino, Hao Xu
  • Publication number: 20190327735
    Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine a TDD frame structure of a group of TDD frame structures for narrowband communications. The apparatus may transmit a series of repetitions of a narrowband physical downlink channel using the narrowband TDD frame structure. In one aspect, a first portion of repetitions from the series of repetitions may be transmitted in one or more first sets of downlink subframes using a first scrambling sequence. In one aspect, a second portion of repetitions from the series of repetitions may be transmitted in one or more second sets of downlink subframes using a second scrambling sequence.
    Type: Application
    Filed: July 2, 2019
    Publication date: October 24, 2019
    Inventors: Gowrisankar SOMICHETTY, Kapil BHATTAD, Alberto RICO ALVARINO, Xiao Feng WANG, Manikandan CHANDRASEKAR
  • Patent number: 10454658
    Abstract: There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In one aspect, the apparatus may receive information associated with a narrowband TDD frame structure for narrowband communications, the narrowband TDD frame structure including a set of contiguous uplink subframes. The apparatus may also determine an orthogonal sequence length associated with a reference signal (RS) based on at least one of a number of uplink subframes or a number of slots in the set of contiguous uplink subframes. In addition, the apparatus may transmit the RS using the determined orthogonal sequence length.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: October 22, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Kapil Bhattad, Xiao feng Wang, Alberto Rico Alvarino, Hao Xu
  • Patent number: 10454657
    Abstract: There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine a narrowband TDD frame structure for narrowband communications. The apparatus may also determine a PUSCH format of a group of PUSCH formats for allocating at least one RU to a UE for a NPUCCH. In addition, the apparatus may allocate the at least one RU to the UE using the determined PUSCH format. In one aspect, the RU may include one or more subcarriers in each of one or more slots.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: October 22, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Kapil Bhattad, Xiao feng Wang, Alberto Rico Alvarino, Hao Xu
  • Patent number: 10454659
    Abstract: There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may receive information associated with a narrowband TDD frame structure for narrowband communications. The apparatus may transmit a first symbol group of a first narrowband physical random access channel (NPRACH) preamble to a base station. In one aspect, a first length of the first symbol group may be associated with the narrowband TDD frame structure.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: October 22, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Kapil Bhattad, Xiao feng Wang, Alberto Rico Alvarino, Hao Xu
  • Patent number: 10454520
    Abstract: Coverage enhancements and coverage mode switching related optimizations are discussed for user equipments (UEs) that may switch between various coverage extension (CE) and non-CE modes of operation. In such enhancements, paging uncertainty and delays may be reduced by sending pages either simultaneously or using historical information over multiple coverage modes available to UEs. Random access procedures may be improved by providing CE mode random access procedures that are available when normal mode random access attempts fail and before declaring radio link failure. Additional aspects include improvements for more advanced UEs to improve coverage within normal mode operations by leveraging techniques used for narrowband CE mode operations, including transmission repetition and gapless transmission scheduling over hopped narrowband frequencies.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: October 22, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Kapil Bhattad, Hao Xu, Alberto Rico Alvarino, Peter Gaal, Masato Kitazoe, Sharad Sambhwani
  • Publication number: 20190319698
    Abstract: A UE may determine a frame structure for narrowband communications, the frame structure corresponding to one frame structure from a group of TDD frame structures of different downlink and uplink subframe configurations. The UE receives configuration information indicating a first carrier to monitor for a BCH and/or a SIB1. Then, the UE receives a PSS, an SSS, and the BCH and/or the SIB1 using the frame structure determined for the narrowband communications. The first carrier that is used to receive the BCH and/or the SIB1 may be different from a second carrier used to receive one or more of the PSS or the SSS.
    Type: Application
    Filed: June 26, 2019
    Publication date: October 17, 2019
    Inventors: Arvind SRIDHARAN, Kapil BHATTAD, Manikandan CHANDRASEKAR, Gowrisankar SOMICHETTY, Alberto RICO ALVARINO, Xiao Feng WANG
  • Patent number: 10448421
    Abstract: Methods, systems, and devices for wireless communication are described for cross-carrier scheduling for wireless devices. In an example, a wireless device may monitor a control channel on a first carrier of a plurality of carriers to obtain a grant allocating resources to the wireless device within a shared data channel. In some cases, a time duration between the grant and the allocated resources within the shared data channel is based at least in part on which carrier of the plurality of carriers transports the shared data channel. The wireless device may transmit or receive over the shared data channel using the allocated resources and based at least in part on the time duration.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: October 15, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Kapil Bhattad, Alberto Rico Alvarino, Hao Xu
  • Publication number: 20190313409
    Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a base station transmitting to a user equipment (UE) a partial bandwidth configuration for uplink transmissions, where the partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth, for example, for autonomous uplink (AUL) transmissions. The base station may also transmit to the UE an AUL configuration including a group identifier. The UE may determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission based on the group identifier. In some cases, different UEs may be grouped into groups of UEs allocated non-overlapping resources, and UEs allocated overlapping resources may have different starting offsets to begin transmitting. According to the determined starting offset, the UE may perform the partial bandwidth transmission over the channel interlace and the portion of the channel bandwidth.
    Type: Application
    Filed: April 3, 2019
    Publication date: October 10, 2019
    Inventors: Qingjiang Tian, Xiaoxia Zhang, Jing Sun, Kapil Bhattad, Srinivas Yerramalli, Chih-Hao Liu
  • Patent number: 10439782
    Abstract: Certain aspects of the present disclosure provide techniques for implicitly linking aperiodic channel state information (A-CSI) reports to CSI-reference signal (CSI-RS) resources. In an aspect, the UE may be instructed to report on specific CSI-RS resource(s) via explicit signaling in the UE grant. Other aspects disclose techniques for implicit CSI-RS resource selection by the UE that require fewer signaling resources. Instead of explicitly signaling CSI-RS resources to the UE, the UE may implicitly select CSI-RS resource for CSI feedback reporting based on information known to the UE, e.g. a subframe on which a reporting request is received. This may reduce the impact of the additional signaling in the UE grant.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: October 8, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Stefan Geirhofer, Tao Luo, Wanshi Chen, Peter Gaal, Hao Xu, Kapil Bhattad, Tingfang Ji
  • Publication number: 20190306878
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) and a base station may communicate in an unlicensed spectrum (e.g., a shared radio frequency spectrum band). As such, the UE may determine a codebook size for transmitting hybrid access request (HARQ) acknowledgement (ACK) feedback with respect to the unlicensed spectrum. Accordingly, the UE may base the HARQ ACK codebook size on a number of HARQ processes with which the UE has been configured. Additionally or alternatively, the UE may base the HARQ ACK codebook size on a number and/or duration of downlink channel monitoring occasions indicated by the base station. In some cases, the UE may base the HARQ ACK codebook size on a combination of the techniques described herein.
    Type: Application
    Filed: February 21, 2019
    Publication date: October 3, 2019
    Inventors: Xiaoxia Zhang, Zhifei Fan, Kapil Bhattad, Jing Sun, Tamer Kadous, Srinivas Yerramalli
  • Publication number: 20190297579
    Abstract: Wireless communications systems and methods related monitoring the start of a transmission opportunity (TXOP) in unlicensed or shared frequency bands are provided. In one embodiment, a first wireless communication device communicates, with a second wireless communication device, a first configuration including a set of first control channel monitoring periods outside of a TXOP. The first wireless communication device communicates, with the second wireless communication device, a communication signal during the TXOP based on a second control channel monitoring period longer than each of the first control channel monitoring periods. In one embodiment, a first wireless communication device communicates, with a second wireless communication device, a configuration including a first search space for a control channel monitoring outside of a TXOP and a second search space for a control channel monitoring within the TXOP, the second search space being partially-overlapped with the first search space.
    Type: Application
    Filed: March 25, 2019
    Publication date: September 26, 2019
    Inventors: Kapil Bhattad, Jing Sun, Xiaoxia Zhang, Ananta Narayanan Thyagarajan
  • Patent number: 10420102
    Abstract: There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine to transmit a narrowband physical downlink channel in a subframe in a narrowband TDD frame structure of a plurality of narrowband TDD frame structures for narrowband communications. In addition, the apparatus may determine whether the subframe is a special subframe or a downlink subframe when the narrowband TDD frame structure includes one or more special subframes. Further, the apparatus may determine how to transmit a narrowband physical downlink channel based on the determination whether the subframe is a special subframe or a downlink subframe. Additionally, the apparatus may transmit the narrowband physical downlink channel.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: September 17, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Gowrisankar Somichetty, Kapil Bhattad, Alberto Rico Alvarino, Xiao feng Wang, Manikandan Chandrasekar
  • Publication number: 20190280836
    Abstract: Beam-specific autonomous uplink (AUL) resources may be configured with an associated reference signal for beam management. For example, a base station may configure respective sets of AUL resources that are specific to one or more base station receive beams. These sets of beam-specific AUL resources may be configured to be associated (e.g., quasi co-located (QCL)) with a reference signal, such as a channel state information reference signal (CSI-RS), a synchronization signal burst (SSB), or the like. The base station may periodically transmit the reference signals that are associated with the AUL resources. A user equipment (UE), upon detecting one or more of the reference signals, may identify which set of AUL resources are available for an AUL transmission of uplink data. In such cases, the UE may select a set of AUL resources based on a signal strength of the reference signal associated with that set of AUL resources.
    Type: Application
    Filed: March 4, 2019
    Publication date: September 12, 2019
    Inventors: Kapil Bhattad, Jing Sun, Xiaoxia Zhang, Srinivas Yerramalli, Tamer Kadous, Yongbin Wei, Tao Luo
  • Publication number: 20190280839
    Abstract: A method for wireless communication is disclosed which includes selecting a first resource pattern comprising resource elements that are non-colocated with a second resource pattern and allocating the first resource pattern to a plurality of antennas for transmitting a channel state information reference signal.
    Type: Application
    Filed: May 30, 2019
    Publication date: September 12, 2019
    Inventors: Amir FARAJIDANA, Alexei Yurievitch Gorokhov, Juan Montojo, Kapil Bhattad
  • Publication number: 20190274137
    Abstract: Wireless communications systems and methods related to scheduling and communicating in an uplink direction over a medium shared by multiple network operating entities are provided. A first wireless communication device transmits, to a second wireless communication device, a message indicating an uplink allocation in a transmission slot, the uplink allocation including an allocation size based on an allowable listen-before-talk (LBT) delay in the transmission slot. The first wireless communication device receives, from the second wireless communication device, an uplink communication signal in the transmission slot, the uplink communication signal including an uplink data portion based on the allocation size and a filler portion associated with an LBT delay in the transmission slot.
    Type: Application
    Filed: February 26, 2019
    Publication date: September 5, 2019
    Inventors: Kapil Bhattad, Xiaoxia Zhang, Jing Sun, Ananta Narayanan Thyagarajan
  • Publication number: 20190274162
    Abstract: Wireless communications systems and methods related to communicating in a frequency band based on bandwidth parts are provided. A first wireless communication device communicates with a second wireless communication device, a first configuration indicating a plurality of bandwidth parts in a frequency band, the plurality of bandwidth parts based on an expected channel access pattern associated with a listen-before-talk (LBT) in the frequency band. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in a first bandwidth part of the plurality of bandwidth parts based on an LBT result.
    Type: Application
    Filed: February 27, 2019
    Publication date: September 5, 2019
    Inventors: Xiaoxia Zhang, Tamer Kadous, Kapil Bhattad, Jing Sun
  • Publication number: 20190274155
    Abstract: In some aspects, a wireless node, such as a user equipment (UE), may measure a reference signal (RS) on a first group of RS resource sets, wherein each RS resource set in the first group of RS resource sets is associated with a different set of wireless nodes; may detect interference on a first RS resource set in the first group of RS resource sets, wherein the first RS resource set is associated with a first set of wireless nodes; and may measure RS on a second group of RS resource sets based at least in part on detecting the interference, wherein the second group of RS resource sets is determined based at least in part on the first RS resource set, and wherein each RS resource set of the second group of RS resource sets is associated with a subset of the first set of wireless nodes.
    Type: Application
    Filed: February 21, 2019
    Publication date: September 5, 2019
    Inventors: Kapil BHATTAD, Ananta Narayanan THYAGARAJAN, Xiaoxia ZHANG, Jing SUN