Patents by Inventor Tamer A. Kadous

Tamer A. Kadous 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: 20190313260
    Abstract: Wireless communications systems and methods related to on-demand cell coverage extension for broadcast signals are provided. A first wireless communication device communicates, with a second wireless communication device, a first extended cell coverage request. The first wireless communication device communicates, with the second wireless communication device, a first broadcast communication signal in an extended cell coverage mode in response to the first extended cell coverage request. The first broadcast communication signal includes a system information block repeated in at least one of a time domain or a frequency domain.
    Type: Application
    Filed: April 2, 2019
    Publication date: October 10, 2019
    Inventors: Xiaoxia Zhang, Zhifei Fan, Jing Sun, Andrei Dragos Radulescu, Srinivas Yerramalli, Tamer Kadous
  • Publication number: 20190313419
    Abstract: Methods, systems, and devices for wireless communications are described. In systems supporting multiple communication protocol types (e.g., ultra-reliable low-latency communication and enhance mobile broadband communication), a user equipment may implement multiplexing rules for handling overlapping transmissions of different communication protocols. For example, if lower latency data supports multiplexing with higher latency data and a lower latency resource overlaps (either partially or completely) with a higher latency resource, a number of options can be taken to control multiplexing. Similarly, if low latency uplink control information supports multiplexing with a slot-based physical uplink shared channel, and the physical uplink shared channel has its own uplink control information, a number of options can be taken to control multiplexing.
    Type: Application
    Filed: April 2, 2019
    Publication date: October 10, 2019
    Inventors: Seyed Ali Akbar Fakoorian, Jing Sun, Xiaoxia Zhang, Srinivas Yerramalli, Tamer Kadous
  • Publication number: 20190312763
    Abstract: Flexible waveform synthesis is disclosed for new radio (NR) shared spectrum (NR-SS) networks. In order to accommodate variable transmission resources, a transmitter may construct an M×N grid to model a resource element (RE) map of transmission resources available to the transmitter within a shared communication channel, where M corresponds to a number of symbols for a scheduled physical signal and N corresponds to a number of tones of a transmission bandwidth for the transmitter. The transmitter may then map the M×N grid to the RE map and puncture one or more REs associated with the subbands unavailable for transmission in the transmission resources. The transmitter may then transmit a transmission according to the unpunctured REs of the RE map.
    Type: Application
    Filed: March 12, 2019
    Publication date: October 10, 2019
    Inventors: Jing Lei, Srinivas Yerramalli, Tamer Kadous
  • Publication number: 20190312671
    Abstract: Methods, systems, and devices for wireless communications are described. In accordance with the described techniques, communicating devices (e.g., an encoder and decoder) may apply an orthogonal cover code to a polar codeword to reduce cross-correlation between different codewords. For example, such techniques may reduce power consumption at a decoding device by providing for earlier decoding termination (e.g., as a result of the reduced cross-correlation). Techniques for generating the cover codes (e.g., on a per-aggregation level basis) and applying the cover codes (e.g., within a search space) are described. Additionally or alternatively, the described techniques may relate to seeding of reference signals used to support decoding of the codewords. Improved orthogonality between reference signal seeds may further suppress codeword recipient ambiguity.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 10, 2019
    Inventors: Jamie Menjay Lin, Siddhartha Mallik, Tamer Kadous
  • 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: 20190306881
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform a transmission detection procedure on each base station before combining control information. The UE may use demodulation reference signals (DMRS) as a detection mechanism. If the UE detects a DMRS from a base station, the UE may determine that a control resource set associated with the base station is valid for combining. If the UE does not detect DMRS from the base station, the UE may refrain from combining control information from the base station. In another example, base stations that pass a listen-before-talk (LBT) pr6ocedure may transmit a preamble before transmitting control information. A preamble may carry a preamble sequence associated with a specific control resource set. The UE may identify a preamble sequence and determine that the corresponding control resource set is valid for control information combining.
    Type: Application
    Filed: March 26, 2019
    Publication date: October 3, 2019
    Inventors: Seyed Ali Akbar Fakoorian, Xiaoxia Zhang, Srinivas Yerramalli, Chih-Hao Liu, Tamer Kadous
  • Patent number: 10433179
    Abstract: Wireless communications systems and methods related to SDMA operations across multiple network operating entities are provided. A first wireless communication device transmits a communication indicating a reservation for one or more spatial layers in a transmission opportunity (TXOP) of a shared spectrum. The shared spectrum is shared by a first network operating entity and a second network operating entity. The first wireless communication device is associated with the first network operating entity. The first wireless communication device communicates, with a second wireless communication device, data over the one or more spatial layers during the TXOP. The second wireless communication device is associated with the first network operating entity.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: October 1, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Xiaoxia Zhang, Taesang Yoo, Siddhartha Mallik, Tamer Kadous, Vikas Jain, Ahmed Sadek
  • 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
  • Patent number: 10411795
    Abstract: Described techniques provide for switching a user equipment (UE) between different coverage enhancement (CE) modes, such as between a non-CE mode and a CE mode. A UE may determine that a CE mode switch is to be performed and may initiate the mode switching. The UE may compare signal qualities of signals from one or more base stations against one or more threshold values and determine that a switch from a CE mode to a non-CE mode, or from a non-CE to CE mode, is to be performed. In some cases, a UE may be in idle mode and switch between CE modes, or may perform a cell reselection to a different base station. In other cases, a UE may be in connected mode and may declare a radio link failure to initiate a mode switch. A base station may initiate mode switching based on radio link monitoring of UEs.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: September 10, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Chih-Hao Liu, Srinivas Yerramalli, Tamer Kadous
  • 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
  • Patent number: 10404434
    Abstract: Methods, systems, and devices for wireless communication are described that involve determining multiple beamformed transmission beams for transmission of an opportunistic or multi-beam discovery reference signal (DRS) over a shared radio frequency spectrum band. The base station may determine a contention exempt transmission (CET) period for the shared spectrum band and transmit the DRS using multiple transmission beams during CET period or the base station may perform a listen before talk (LBT) procedure, and transmit, based on the LBT procedure, the DRS over a shared radio frequency spectrum band. The base station may transmit an indication of the type of DRS transmission, a subframe offset, random access configurations, and/or error correcting codes to enable a user equipment to discover, connect to, and acquire timing information associated with the network.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: September 3, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Arumugam Chendamarai Kannan, Andrei Dragos Radulescu, Chirag Sureshbhai Patel, Tamer Kadous
  • Patent number: 10405335
    Abstract: Soft channel reservation in shared spectrum networks is discussed. In network areas where multiple wireless nodes, whether from the same or different network operators, share spectrum using a channel reservation signaling form of contention resolution, an aggressor transmitter listens for a neighbor receiver's receiver channel reservation signal to the neighbor transmitter the neighbor receiver is in communication with. The receiver channel reservation signal includes channel condition information that the aggressor transmitter can use to estimate an interference impact at the neighbor receiver should the aggressor transmitter performs its transmissions to its own receivers. Based on whether this estimated interference impact exceeds or remains within a particular threshold, the aggressor transmitter may decide whether or not to back off of its transmissions until a later time.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: September 3, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Sanaz Barghi, Jing Sun, Mohammad Naghshvar, Tamer Kadous
  • Patent number: 10404509
    Abstract: Methods, systems, and devices for wireless communication are described for slot structures using guard intervals in a single carrier waveform. Techniques provide for generating a first waveform for control information or reference signal transmissions in a first subset of symbols, and generating a second waveform for data to be transmitted in a second subset of symbols. A combination waveform may be generated based on the first and second waveforms that is transmitted to a receiver, such as by concatenating the first and second waveforms. The first waveform may be generated by appending a guard interval (GI) sequence to a reference signal or control information, and performing a discrete Fourier transform spread frequency division multiplexing (DFT-s-FDM) procedure. The second waveform may be generated by appending the GI to data to be transmitted in each symbol of the second subset of symbols, and performing the DFT-s-FDM procedure.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: September 3, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jing Sun, Xiao Feng Wang, Tao Luo, Tamer Kadous, Sony Akkarakaran, Juan Montojo, Jing Lei
  • Patent number: 10405262
    Abstract: Techniques are described for wireless communication. A method for wireless communication at a user equipment (UE) includes receiving an instance of a discovery reference signal (DRS) on a beam over a shared radio frequency spectrum band; determining a public land mobile network identifier (PLMN ID) based at least in part on a time-frequency location of the instance of the DRS; and selectively performing a random access procedure based at least in part on the determined PLMN ID. A method for wireless communication at a base station includes transmitting an instance of a DRS on a beam over a shared radio frequency spectrum band; and transmitting a PLMN ID based at least in part on a time-frequency location of the DRS.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: September 3, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Arumugam Chendamarai Kannan, Andrei Dragos Radulescu, Chirag Patel, Tamer Kadous
  • Patent number: 10405228
    Abstract: Configurations of system information blocks providing cell access information supporting wideband coverage enhancement in wireless communication networks are disclosed. Embodiments encode and transmit information elements for both a legacy system information block and a wideband coverage enhancement system information block in a multiple subframe discovery reference signal configuration. For example, embodiments may utilize a two subframe CR-DRS configuration in which a WCE SIB-MF1 message payload is encoded and transmitted independently with respect to a legacy SIB-MF1 message payload. Additionally, or alternatively, embodiment may utilize a two subframe CR-DRS configuration in which both a legacy SIB-MF1 message payload and a WCE SIB-MF1 message payload share the same DRS subframe payload by jointly encoding the legacy SIB-MF1 and WCE SIB-MF1 messages.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: September 3, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Chih-Hao Liu, Srinivas Yerramalli, Andrei Dragos Radulescu, Tamer Kadous
  • Publication number: 20190268933
    Abstract: Over-the-air (OTA) dynamic time division duplex (TDD) is disclosed with a channel use indicator (CUI) receiver (CUI-R) signal multiplexed in uplink transmissions. According to various aspects, a user equipment (UE) may receive a downlink grant from a serving base station, in which the downlink grant identifies downlink transmissions in one or more subsequent communication slots. The UE may identify a trigger for transmission of a channel usage signal associated with the grant that may be received by neighboring UEs that may potentially interfere. The UE transmits the channel usage signal in a next scheduled uplink region and then receives downlink data from the serving base station according to the downlink grant. If the neighboring UE receives a conditional uplink grant, then it may proceed with uplink transmissions when it fails to detect the channel usage signal from the UE.
    Type: Application
    Filed: February 21, 2019
    Publication date: August 29, 2019
    Inventors: Jing Sun, Xiaoxia Zhang, Kapil Bhattad, Ananta Narayanan Thyagarajan, Tamer Kadous
  • Publication number: 20190268907
    Abstract: Wireless communications systems and methods related to scheduling and communicating in a frequency spectrum using interlaced frequency resources are provided. A first wireless communication device communicates, with a second wireless communication device, a first interlace configuration indicating a first set of interlaced frequency resources in a frequency band based on a power spectral density (PSD) parameter. The first wireless communication device communicates, with the second wireless communication device, a first frequency resource exclusion configuration. The first wireless communication device communicates, with the second wireless communication device, a first allocation including at least some frequency resources from the first set of interlaced frequency resources based on the first frequency resource exclusion configuration. The first wireless communication device communicates, with the second wireless communication device, a first communication signal based on the first allocation.
    Type: Application
    Filed: February 7, 2019
    Publication date: August 29, 2019
    Inventors: Kapil Bhattad, Ananta Narayanan Thyagarajan, Xiaoxia Zhang, Jing Sun, Tamer Kadous
  • Publication number: 20190261354
    Abstract: Techniques and apparatus for enhancing uplink grant-free transmissions and/or downlink semi-persistent scheduling (SPS) transmissions for uplink ultra-reliable low latency communications (URLLC) are described. One technique includes receiving a first configuration for a first grant-free communication and a second configuration for at least one second grant-free communication. Grant-free communications are performed based on at least one of the first configuration or the second configuration.
    Type: Application
    Filed: February 21, 2019
    Publication date: August 22, 2019
    Inventors: Seyed Ali Akbar FAKOORIAN, Srinivas YERRAMALLI, Xiaoxia ZHANG, Jing SUN, Tamer KADOUS
  • Publication number: 20190253219
    Abstract: Methods, systems, and devices for wireless communications are described. One method may include receiving, by a user equipment (UE) from a base station, a resource allocation indicator corresponding to a total number of resource elements to allocate for uplink control information within a resource allocation of a shared data channel. The UE may determine anchor resources within the resource allocation, and determine a plurality of transmission parameters for an autonomous uplink transmission based on the total number of resource elements. The UE may transmit, to the base station, the uplink control information within the anchor resources to indicate the plurality of transmission parameters for the autonomous uplink transmission.
    Type: Application
    Filed: January 7, 2019
    Publication date: August 15, 2019
    Inventors: Zhifei Fan, Xiaoxia Zhang, Jing Sun, Tamer Kadous, Qingjiang Tian
  • Publication number: 20190246410
    Abstract: Synchronization signal block (SSB) multiplexing and remaining material system information (RMSI) monitoring in new radio unlicensed (NR-U) networks are disclosed. For SSB multiplexing, a user equipment (UE) receives an SSB configuration for a discovery signal detection window having a plurality of communication slots, wherein, based on the SSB configuration, UE identifies random access resource and time and frequency locations to monitor remaining minimum system information (RMSI) configured for each SSB. The UE further receives an SSB transmission indicator that reflects a listen before talk (LBT) result, which it may use with the SSB configuration to map one or more SSB for rate matching in selected slots. The UE can then rate match any data transmissions around the identified SSBs in those identified slots regardless of LBT result. The UE may further leverage the SSB configuration and indication of LBT result to monitor SSB transmissions for control resource set (CORESET) transmissions.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 8, 2019
    Inventors: Xiaoxia Zhang, Jing Sun, Tamer Kadous