Patents by Inventor Aleksandar Damnjanovic

Aleksandar Damnjanovic 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: 10757728
    Abstract: Methods, systems, and devices for wireless communication are described. Different transmission time interval (TTI) durations may be supported and configured to coexist with one another. A set of TTIs with a relatively short duration may overlap in time with longer duration TTIs. Boundaries of TTIs with a relatively short duration may be configured to align with boundaries of relatively longer duration TTIs. For example, TTIs that are a Long Term Evolution (LTE) subframe, an LTE slot, and a duration of two LTE symbol periods may be supported. Two-symbol period TTIs may align with or be embedded within slot-duration TTIs, which, in turn, may align with or be embedded within a subframe. In some examples, one or more symbol periods of a subframe may be designated as a gap between two-symbol TTIs within the subframe, or such symbols may be merged with a two-symbol TTI within the subframe.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: August 25, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Jing Sun, Wanshi Chen, Peter Gaal, Shimman Arvind Patel, Aleksandar Damnjanovic, Hao Xu, Juan Montojo
  • Publication number: 20200267745
    Abstract: Methods, systems, and devices for wireless communications are described. A User equipment (UE) may identify a set of semi-persistent scheduled resources configured for uplink transmissions by the UE. The UE may receive, from a base station, a resource grid that indicates scheduled uplink communications for one or more other UEs. The UE may determine a set of uplink resources for the UE based on the set of semi-persistent scheduled resources and the resource grid. The UE may then transmit an uplink message to the base station via the set of uplink resources. In some cases, the UE may identify resources for the scheduled uplink communications based on the resource grid and determine a set of conditional resources available for the UE based on the resources for the scheduled uplink communications, where the set of uplink resources includes at least a portion of the set of conditional resources.
    Type: Application
    Filed: February 13, 2020
    Publication date: August 20, 2020
    Inventors: Aleksandar Damnjanovic, Xiaoxia Zhang, Junyi Li, Seyed Ali Akbar Fakoorian
  • Publication number: 20200267583
    Abstract: Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine a measurement regarding a plurality of bandwidth parts of a carrier of the user equipment based at least in part on a measurement object associated with the measurement; determine a cell quality regarding the plurality of bandwidth parts based at least in part on the measurement object; and/or transmit a measurement report identifying the measurement and/or the cell quality based at least in part on the measurement object. Numerous other aspects are provided.
    Type: Application
    Filed: September 21, 2018
    Publication date: August 20, 2020
    Inventors: Peng CHENG, Masato KITAZOE, Aleksandar DAMNJANOVIC, Sumeeth NAGARAJA, Keiichi KUBOTA, Wanshi CHEN, Valentin Alexandru GHEORGHIU, Peter GAAL, Juan MONTOJO
  • Patent number: 10750494
    Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may establish a configuration for at least one carrier based on multiple transmission time interval (TTI) lengths. Several TTI lengths may be associated in a TTI group, and aspects of the configuration may be the same for all TTIs having a TTI length in the TTI group. The device may then communicate using the carrier configuration based on the TTI group. In some cases, a second TTI group with different TTI lengths from the first group may also be identified, and the device may communicate using TTI from the second group using a different TTI group configuration. Aspects of a TTI group configuration may include a common control channel format, resource allocation granularity, hybrid automatic repeat request (HARQ) process, HARQ timing, soft buffer size, channel state information (CSI) reporting configuration, or an uplink control channel.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: August 18, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Peter Gaal, Shimman Arvind Patel, Hao Xu, Aleksandar Damnjanovic
  • Publication number: 20200260292
    Abstract: A method, apparatus, and computer-readable medium that enable and disable autonomous downlink transmission (ADT) capability at a user equipment (UE) or a gNB are disclosed. The ADT capability is enabled when a triggering event occurs. The ADT capability is realized in part via initiating a listen before talk (LBT) procedure of a first LBT type to obtain an uplink (UL) transmission opportunity (TxOP) after determining that the UE does not have any UL data to transmit, transmitting uplink control information (UCI) with a limited amount of data to request for a resource grant of the TxOP for pending DL data; and receiving the pending DL data, wherein resources for receiving the pending DL data is dynamically configured via the UCI or semi-statically configured through a radio resource control (RRC) protocol message.
    Type: Application
    Filed: February 6, 2020
    Publication date: August 13, 2020
    Inventors: Yisheng XUE, Jing Sun, Aleksandar Damnjanovic, Xiaoxia Zhang, Yongbin Wei
  • Publication number: 20200260399
    Abstract: Management of re-synchronization procedures for long term evolution (LTE)/LTE-Advanced (LTE-A) systems with unlicensed spectrum is disclosed. In managing re-synchronization procedures, a base station selects and sends out an enablement indication of the uplink and/or downlink re-synchronization procedure selected. The base station may select the re-synchronization procedures by itself or in coordination with neighboring base stations. Once the indication for the uplink re-synchronization procedure is received at a user equipment (UE), the UE performs its extended clear channel assessment (ECCA) check, but, when the ECCA check is successful, the UE will delay data transmission until the next re-synchronization boundary defined by the selected uplink re-synchronization procedure. With the delayed transmission, the UE performs a clear channel assessment (CCA) check prior to the re-synchronization boundary in order to determine whether the channel is still clear for transmission after the idle period.
    Type: Application
    Filed: April 28, 2020
    Publication date: August 13, 2020
    Inventors: Tao Luo, Wanshi Chen, Aleksandar Damnjanovic
  • Publication number: 20200252820
    Abstract: A configuration to enable a UE to obtain access to an unlicensed frequency channel of the unlicensed frequency spectrum in the event of channel access failures. The apparatus performs a radio link monitoring (RLM) for a first unlicensed frequency channel of an unlicensed frequency spectrum for a transmission from a first base station. The apparatus determines that the first unlicensed frequency channel is unavailable for the transmission based on a comparison of one or more of a reference signal received power (RSRP), a reference signal received quality (RSRQ), a received signal strength indicator (RSSI), a signal to interference plus noise ratio (SINR), a signal to noise ratio (SNR), or a channel occupancy or interference metric to a corresponding threshold. The apparatus sends a report to the first base station indicating a failure of the transmission upon determining that the first unlicensed frequency channel is unavailable for the transmission.
    Type: Application
    Filed: January 29, 2020
    Publication date: August 6, 2020
    Inventors: Ozcan OZTURK, Xiaoxia ZHANG, Aleksandar DAMNJANOVIC, Jing SUN
  • Publication number: 20200252977
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify that the UE is configured to use a two-step random access channel (RACH) procedure. The two-step RACH procedure may include an uplink request message and a downlink response. The UE may transmit the uplink request message as part of the two-step RACH procedure, and the uplink request message may include a preamble portion that is one of a set of predefined sequences and a payload portion that includes a physical uplink shared channel waveform. The UE may receive the downlink response as part of the two-step RACH procedure and in response to the uplink request message.
    Type: Application
    Filed: April 21, 2020
    Publication date: August 6, 2020
    Inventors: Xiaoxia Zhang, Srinivas Yerramalli, Jing Sun, Aleksandar Damnjanovic, Ozcan Ozturk, Tao Luo, Yongbin Wei
  • Patent number: 10728928
    Abstract: Wireless communications systems and methods related to performing random backoff over multiple spatial dimensions in spatial listen-before-talk (LBT) procedures are provided. A first wireless communication device determines a first backoff counter for contending for a transmission opportunity (TXOP) in a communication medium over a first spatial subspace. The first wireless communication device detects a transmission in the TXOP within the first spatial subspace. The first wireless communication device determines a second backoff counter for contending for the TXOP over a second spatial subspace that is different from the first spatial subspace based on the detecting. The second spatial subspace is part of the first spatial subspace and the detected transmission is in a different spatial subspace than the second spatial subspace.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: July 28, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Xiaoxia Zhang, Taesang Yoo, Siddhartha Mallik, Aleksandar Damnjanovic, Tamer Kadous
  • Patent number: 10727983
    Abstract: Methods, systems, and apparatuses for enabling and utilizing variable length transmission time intervals (TTI) are described. Latency for communications between base stations and user equipment (UEs) may be reduced by flexibly and dynamically adapting to data traffic needs. TTI for a given UE may be dynamically adjusted according to UE or system requirements and the configuration of uplink and downlink TTI. A base station may utilize dynamic grants to schedule resources within a system. A UE may receive a grant in a first portion of a variable TTI. The UE may determine a duration of the variable TTI based on the grant, and the UE may communicate accordingly. The UE may receive a subsequent grant in the variable TTI—either in the first portion or another portion—and may respond or alter its operation accordingly.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: July 28, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Jelena Damnjanovic, Aleksandar Damnjanovic, Madhavan Srinivasan Vajapeyam
  • Patent number: 10728852
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor a narrowband (e.g., a single carrier, anchor carrier, etc.) for a control message that includes a grant for downlink data transmissions. The narrowband containing the control message may be a portion of a system bandwidth. The UE may then monitor a wideband (e.g., all or multiple carriers of the system bandwidth) for data according to the control message. Monitoring the wideband may include additional or alternate circuitry being powered (e.g., receiver circuit switching) to enable reception on an increased range of frequency spectrum. In some examples, a gap or narrowband data transmission may be scheduled between the control message and the grant to allow grant processing and receiver circuitry switching at the UE. In some cases, the control message and data transmission may be received in the same or different transmission time intervals (TTIs).
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: July 28, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Xiaoxia Zhang, Wei Zhang, Aleksandar Damnjanovic, Juan Montojo
  • Publication number: 20200236558
    Abstract: Wireless communications systems and methods related to automatic frequency coordination (AFC) for spectrum sharing among multiple network operating entities are provided. A first wireless communication device transmits, to a spectrum access coordination entity, a spectrum access request. The first wireless communication device receives, from the spectrum access coordination entity in response to the spectrum access request, a configuration including at least a medium access protocol parameter for performing a medium access procedure in a spectrum shared by a plurality of network operating entities.
    Type: Application
    Filed: January 21, 2020
    Publication date: July 23, 2020
    Inventors: Aleksandar Damnjanovic, Yongbin Wei
  • Patent number: 10721770
    Abstract: The disclosure provides for control plane measurements in a wireless device. The wireless device may measure, across multiple sub-frames received over an unlicensed spectrum, received cell-specific reference signals (CRS) from a cell to obtain CRS measurements. The wireless device may identify one or both of a first subset of the CRS measurements associated with a first subset of the sub-frames including opportunistic transmissions and a second subset of the CRS measurements associated with a second subset of the sub-frames including guaranteed transmissions. The wireless device may compute one or both of a first signal to interference plus noise ratio (SINR) value for the first subset of the CRS measurements and a second SINR value for the second subset of the CRS measurements. The wireless device may monitor a radio link condition of the wireless device based at least in part on the first SINR value or the second SINR value.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: July 21, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Madhavan Srinivasan Vajapeyam, Aleksandar Damnjanovic, Tao Luo, Yongbin Wei, Durga Prasad Malladi
  • Patent number: 10721628
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may determine that a communication is to be transmitted on a shared spectrum during a channel access interval not reserved for the communication. The transmitter device may determine, based at least in part on determining that the communication is to be transmitted, that a detection power of a listen-before-talk (LBT) operation satisfies a threshold. The transmitter device may transmit, after a coordinated rate control region and based at least in part on the detection power of the LBT operation satisfying the threshold, a reservation request signal associated with the communication. The transmitter device may transmit the communication before an end of the channel access interval based at least in part on a response to the reservation request signal. Numerous other aspects are provided.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: July 21, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Yisheng Xue, Aleksandar Damnjanovic, Yongbin Wei, Tamer Kadous, Xiaoxia Zhang, Jing Sun
  • Patent number: 10721720
    Abstract: Dynamic cell mode indication and reporting channel state information for dormant cells in a dual connectivity carrier aggregation environment. UEs may be configured for carrier aggregation of cells associated with non-collocated eNBs, which may include a master eNB (MeNB) and one or more secondary eNBs (SeNB), each supporting multiple carrier frequencies. Indicators of cell mode for secondary cells of the MeNB or SeNB are periodically sent using a broadcast mechanism and may configure active or dormant sub-periods within the indicated periods. The indicators may be transmitted by a primary cell for the MeNB or special secondary cell for the SeNB. Alternatively, the indicators may be transmitted by the secondary cell. When CSI measurements occur for a dormant cell, the UE may report CSI for the dormant periods, suppress CSI reporting for the dormant periods, or report some types of CSI and not others for the dormant periods.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: July 21, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Aleksandar Damnjanovic, Jelena Damnjanovic, Peter Gaal, Wanshi Chen, Madhavan Srinivasan Vajapeyam
  • Patent number: 10721743
    Abstract: Uplink control channel management is disclosed for LTE/LTE-A communication systems with unlicensed spectrum in which two or more physical resource blocks (PRBs) are allocated for uplink control channel transmission. The uplink control information (UCI) payload may be determined based on clear channel assessment (CCA) information associated with carriers scheduled for transmission of the UCI data. With the UCI payload determined, two or more uplink control channel messages may be generated according to at least one control channel format, wherein uplink control channel messages include the UCI payload. These generated uplink control channel messages may then be transmitted over the allocated PRBs.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: July 21, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Aleksandar Damnjanovic, Srinivas Yerramalli, Tao Luo, Peter Gaal
  • Publication number: 20200229219
    Abstract: Autonomous uplink (AUL) for wideband new radio (NR) unlicensed (NR-U) operations is disclosed. For user equipments (UEs) that have been configured for AUL transmissions and have received an activation signal to activate the AUL capabilities, further indications may be used to enable AUL transmissions on AUL transmission opportunities (TxOPs) that overlap the timing of a current TxOP reserved by a serving base station, but that are allocated outside of the resources reserved for the current TxOP. A UE that identifies a desired, next AUL TxOP that overlaps the current base station-initiated TxOP duration, but is allocated for resources outside of the current TxOP resources determines whether it has obtained an enablement indication either directly from the serving base station or implicitly, based on current conditions at the UE. When the UE determines that it has obtained an enabling indication, it may then perform AUL transmissions via the overlapping AUL TxOP.
    Type: Application
    Filed: January 9, 2020
    Publication date: July 16, 2020
    Inventors: Yisheng Xue, Aleksandar Damnjanovic, Jing Sun, Xiaoxia Zhang, Yongbin Wei
  • Publication number: 20200229116
    Abstract: Methods, systems, and devices for wireless communication are described that provide for discovery of resources in a wireless communications system. The wireless communications system supports operations for multiple network operating entities that share a radio frequency spectrum. To discover and perform synchronization with the wireless communications system, a common preamble may be transmitted by nodes associated with multiple network operating entities. The common preamble may include information common to each of the multiple network operating entities which may be used by a device to identify neighboring wireless nodes, available network operating entities, or sub-intervals designated for prioritized or opportunistic use by one or more network operating entities.
    Type: Application
    Filed: March 23, 2020
    Publication date: July 16, 2020
    Inventors: Michael Mingxi Fan, Juan Montojo, Naga Bhushan, Aleksandar Damnjanovic, Ahmed Kamel Sadek
  • Publication number: 20200228996
    Abstract: Certain aspects of the present disclosure provide techniques for protecting overhead and common channel transmissions in a NR shared spectrum system. A BS of a first operator may receive information regarding at least one overhead transmission associated with a wireless device of a second operator and may protect one or more overhead signal transmissions of the wireless device based, at least in part, on the received information. A UE may detect information associated with at least one overhead transmission from a wireless device associated with a first operator and may transmit the information regarding the detected overhead transmission to a BS associated with a second operator. A UE served by a BS associated with a first operator may detect a wireless device (e.g., another UE or a BS) associated with a second operator. The UE may report an identification of the wireless device to the BS.
    Type: Application
    Filed: April 1, 2020
    Publication date: July 16, 2020
    Inventors: Aleksandar DAMNJANOVIC, Juan MONTOJO, Siddhartha MALLIK
  • Patent number: 10716129
    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: May 17, 2019
    Date of Patent: July 14, 2020
    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