Patents by Inventor Andrei Dragos Radulescu

Andrei Dragos Radulescu 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: 20180288738
    Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for enhanced paging to a UE being served by a cell over a shared frequency band. The enhanced paging may include multiple paging intervals for each paging cycle. The UE may enable reception for a paging interval and determine whether the UE receives a downlink transmission. The UE may lengthen a paging interval or enable reception during a second paging interval based in part on determining whether the UE receives a downlink transmission. In some examples, the UE may receive a paging queue status indication indicating that paging information will be transmitted during a paging interval or a later interval, or indicating that no paging information is present at a serving cell.
    Type: Application
    Filed: June 6, 2018
    Publication date: October 4, 2018
    Inventors: Jing Sun, Juan Montojo, Taesang Yoo, Siddhartha Mallik, Andrei Dragos Radulescu, Chirag Sureshbhai Patel, Chengjin Zhang
  • Patent number: 10091789
    Abstract: Techniques for managing re-contention on a shared communication medium are disclosed. In order to facilitate re-contending for access to the communication medium, an access point may adjust one or more uplink transmission parameters associated with a triggering condition for invoking a contention timer. In addition or as an alternative, the access point may mute transmission on the communication medium during one or more symbol periods designated for transmission. In addition or as an alternative, the access point may configure a timing advance to create a re-contention gap.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: October 2, 2018
    Assignee: QUALCOMM, Incorporated
    Inventors: Nachiappan Valliappan, Ahmed Kamel Sadek, Peter Gaal, Tamer Adel Kadous, Andrei Dragos Radulescu
  • Publication number: 20180249496
    Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for wireless communication are provided. The apparatus may be a base station. The apparatus may transmit an uplink grant to a UE during a first transmit opportunity. The apparatus may signal, during a second transmit opportunity, a grant trigger to the UE to trigger operations associated with the uplink grant that are uncompleted after the first transmit opportunity. The grant trigger may be associated with a set of UEs that includes the UE. The set of UEs may be a subset of the UEs having pending transmissions. The apparatus may instruct the UE regarding whether to keep or discard resources granted by the uplink grant when the UE switches to a different beam during or prior to the second transmit opportunity.
    Type: Application
    Filed: September 5, 2017
    Publication date: August 30, 2018
    Inventors: Andrei Dragos RADULESCU, Chirag PATEL, Arumugam CHENDAMARAI KANNAN, Tamer KADOUS, Tao LUO, Jing SUN
  • Patent number: 10064186
    Abstract: Techniques are described for wireless communication at a wireless communication device. One method includes obtaining a plurality of signal strength samples for a first wireless channel during a measurement period; determining a loading parameter of the first wireless channel based at least in part on a distribution of the signal strength samples for the first wireless channel among a set of predefined signal strength bins; and selecting a wireless operating channel based at least in part on the determined loading parameter of the first wireless channel.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: August 28, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Mohammad Naghshvar, Ahmed Sadek, Andrei Dragos Radulescu
  • Publication number: 20180242348
    Abstract: A method for wireless communication at a user equipment (UE) includes receiving timing information and a time-frequency resource configuration for an uplink subframe; selecting at least a first set of time-frequency resources of the uplink subframe on which to transmit; and transmitting a grantless transmission on at least the first set of time-frequency resources. The time-frequency resource configuration identifies a correspondence between at least one receive beam in a set of one or more receive beams and at least one set of time-frequency resources in one or more sets of time-frequency resources of the uplink subframe. The first set of time-frequency resources is selected based at least in part on a transmit beam of the UE, a correspondence of the transmit beam to a receive beam in the set of one or more receive beams, and a correspondence of the receive beam to the selected first set of time-frequency resources.
    Type: Application
    Filed: February 19, 2018
    Publication date: August 23, 2018
    Inventors: Arumugam Chendamarai Kannan, Andrei Dragos Radulescu, Chirag Sureshbhai Patel, Tamer Kadous
  • Publication number: 20180241526
    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: Application
    Filed: February 19, 2018
    Publication date: August 23, 2018
    Inventors: Arumugam Chendamarai Kannan, Andrei Dragos Radulescu, Chirag Sureshbhai Patel, Tamer Kadous
  • Publication number: 20180242223
    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: Application
    Filed: August 16, 2017
    Publication date: August 23, 2018
    Inventors: Arumugam Chendamarai Kannan, Andrei Dragos Radulescu, Chirag Patel, Tamer Kadous
  • Publication number: 20180160328
    Abstract: Techniques for access terminal radio link monitoring on a shared communication medium are disclosed. In an aspect, an access terminal detects a missed reference signal event associated with a radio link established on the shared communication medium, wherein detecting the missed reference signal event comprises determining that the access terminal did not detect a reference signal for measuring a quality of the radio link transmitted during a reference signal configuration window, assigns an error metric to the missed reference signal event based on reference signal monitoring capabilities of the access terminal, and triggers a radio link failure based on the assigned error metric. In an aspect, the missed reference signal event may be a missed Discovery Reference Signaling (DRS) event, the error metric may be a Block Error Rate (BLER) weight, and the reference signal for measuring the quality of the radio link comprises a Cell-specific Reference Signal (CRS).
    Type: Application
    Filed: November 30, 2017
    Publication date: June 7, 2018
    Inventors: Arumugam CHENDAMARAI KANNAN, Andrei Dragos RADULESCU, Chirag Sureshbhai PATEL, Tamer Adel KADOUS, Ashok MANTRAVADI, Aamod KHANDEKAR
  • Publication number: 20180124820
    Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit, using a first base station beam, a first message to a user equipment (UE). The first message may include a pre-grant communication and a plurality of downlink beam refinement reference signals (D-BRRSs). The base station may receive a second message from the UE in response to the first message. The second message may include a pre-grant acknowledgement and a plurality of uplink beam refinement reference signals (U-BRRSs). The base station may transmit, using a second base station beam, a third message to the UE. A width of the second base station beam may be less than a width of the first base station beam.
    Type: Application
    Filed: November 1, 2017
    Publication date: May 3, 2018
    Inventors: Jing Sun, Tamer Kadous, Juan Montojo, Peter Pui Lok Ang, Xiaoxia Zhang, Taesang Yoo, Ahmed Kamel Sadek, Sanaz Barghi, Akula Reddy, Andrei Dragos Radulescu, Junyi Li
  • Publication number: 20180115933
    Abstract: Techniques are provided for efficient handover of a user equipment (UE) between base stations that operate using different radio access technologies (RATs). A handover message to a UE may indicate that the UE is to be handed over from a source base station operating according to a first RAT to a target base station operating according to a second RAT. The handover message may be configured to be transmitted using the first RAT and include embedded information, that is transparent to the first RAT, for the handover to the target base station using the second RAT.
    Type: Application
    Filed: October 18, 2017
    Publication date: April 26, 2018
    Inventors: Andrei Dragos Radulescu, Aziz Gholmieh, Tamer Kadous, Chirag Sureshbhai Patel
  • Patent number: 9924368
    Abstract: Apparatus and methods of wireless communications are described for determining one or more bands (e.g., guard bands in wireless local area networks (WLANs)) in unused portions of an unlicensed spectrum, positioning one or more carriers for cellular communication (e.g., long term evolution (LTE) or LTE advanced communication) in the one or more bands, and performing the cellular communication over the unlicensed spectrum using the one or more carriers. In some non-limiting example aspects, the cellular communication may be in a standalone mode and the one or more carriers may include a primary component carrier (PCC) that is positioned in a Wi-Fi guard band. In these non-limiting example aspects, the apparatus and methods may further include allocating one or more secondary component carriers (SCCs) in Wi-Fi guard bands or in Wi-Fi channels, where the one or more SCCs are opportunistically tuned or turned ON/OFF based on cell loading or backhaul constraints.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: March 20, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Nachiappan Valliappan, Tamer Adel Kadous, Ahmed Kamel Sadek, Andrei Dragos Radulescu
  • Patent number: 9913239
    Abstract: Disclosed are system and method for classifying location of a mobile device in a femtocell. In an aspect, the system and method are configured to receive, by a femtocell, location measurement information and performance measurement reports from a mobile device; classify location of the mobile device as indoors or outdoors based on the received location measurement information; and adjust a coverage area, transmit power, and/or radio frequency (RF) channel/band of the femtocell based on the location classification of the mobile device and performance measurements reports.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: March 6, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Peerapol Tinnakornsrisuphap, Damanjit Singh, Andrei Dragos Radulescu, Chirag Sureshbhai Patel
  • Publication number: 20180054780
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and a base station operating in unlicensed spectrum may temporarily increase a paging opportunity window (POW) size, or reduce a time between POWs, in order to meet performance metrics or account for time periods when a base station is unable to win access to the wireless medium during a POW. In some cases, a UE may identify a failed listen-before-talk procedure and autonomously update the POW size. In other examples, a base station may initiate a change in POW size or increase a number of paging opportunities in order to meet achieve one or more key performance indicators (KPIs). After a predetermined period, or after a triggering condition is no longer present, the UE and the base station may reset the POW size or the number of paging opportunities to a nominal amount to conserve power.
    Type: Application
    Filed: June 26, 2017
    Publication date: February 22, 2018
    Inventors: Andrei Dragos Radulescu, Alexei Yurievitch Gorokhov, Chengjin Zhang, Chirag Sureshbhai Patel, Tamer Kadous
  • Publication number: 20170311316
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor for discovery reference signal (DRS) transmissions, physical downlink shared channel (PDSCH) transmissions, or combinations thereof within a DRS transmission window. The UE may attempt to decode DRS or PDSCH transmissions for a subframe based on detection of DRS transmissions, prioritization of DRS transmissions relative to PDSCH transmissions, locations of subframes within a radio frame, overlapping of the DRS transmission window with a paging opportunity, or any combination thereof. In some cases, one or more radio link monitoring (RLM) parameters may be adjusted based on decoding of PDSCH or DRS transmissions.
    Type: Application
    Filed: April 20, 2017
    Publication date: October 26, 2017
    Inventors: Arumugam Chendamarai Kannan, Andrei Dragos Radulescu, Chirag Patel, Tao Luo, Tamer Kadous
  • Publication number: 20170280382
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may attempt to access a network at a local area network access point without prior context information. The access point may be a hotspot operating in unlicensed spectrum according to a Long Term Evolution (LTE)-based standard. The UE may be unable to determine if it is authorized to access the network, so the UE may attempt to obtain system information that provides a list of service providers supported by the network. The UE may then determine whether it has credentials for a supported service provider, and the UE may access the network using those credentials when a supported service provider is recognized. Other broadcast messages may provide information about system information for supported service providers. A UE that is unable to access the network using stored credentials may attempt access using a random access channel procedure.
    Type: Application
    Filed: March 21, 2017
    Publication date: September 28, 2017
    Inventors: Andrei Dragos Radulescu, Tao Luo, Chirag Patel, Miguel Griot, Manu Sharma, Tamer Kadous, Rajat Prakash
  • Publication number: 20170265195
    Abstract: Techniques are described for wireless communication at a wireless communication device. One method includes obtaining a plurality of signal strength samples for a first wireless channel during a measurement period; determining a loading parameter of the first wireless channel based at least in part on a distribution of the signal strength samples for the first wireless channel among a set of predefined signal strength bins; and selecting a wireless operating channel based at least in part on the determined loading parameter of the first wireless channel.
    Type: Application
    Filed: March 7, 2017
    Publication date: September 14, 2017
    Inventors: Mohammad Naghshvar, Ahmed Sadek, Andrei Dragos Radulescu
  • Publication number: 20170223651
    Abstract: Techniques for intra- and inter-operator coordination on a shared communication medium are disclosed. A central coordination server may send an operating mode information message to coordinate operation of different points on the communication medium. An access point may receive such an operating mode information message and adjust one or more communication parameters. An access point may determine a level of timing synchronization with neighboring access points and send a synchronization advertisement message to an access terminal. An access terminal may receive a synchronization advertisement message and perform one or more measurements of the neighboring access points.
    Type: Application
    Filed: January 31, 2017
    Publication date: August 3, 2017
    Inventors: Chirag Sureshbhai PATEL, Tao LUO, Andrei Dragos RADULESCU, Ahmed Kamel SADEK, Tamer Adel KADOUS
  • Publication number: 20170223737
    Abstract: Techniques for intra- and inter-operator coordination on a shared communication medium are disclosed. A central coordination server may send an operating mode information message to coordinate operation of different points on the communication medium. An access point may receive such an operating mode information message and adjust one or more communication parameters. An access point may determine a level of timing synchronization with neighboring access points and send a synchronization advertisement message to an access terminal. An access terminal may receive a synchronization advertisement message and perform one or more measurements of the neighboring access points.
    Type: Application
    Filed: January 31, 2017
    Publication date: August 3, 2017
    Inventors: Chirag Sureshbhai PATEL, Tao LUO, Andrei Dragos RADULESCU, Ahmed Kamel SADEK, Tamer Adel KADOUS
  • Patent number: 9713057
    Abstract: Techniques are described for selected internet protocol traffic offload (SIPTO) support at an assisting eNodeB. A connection may be established between a first eNodeB and a UE, and it may be determined whether a connection exists or is pending between the UE and a second eNodeB. A message may be transmitted to a mobility management entity (MME), the message associating a network address of the second eNodeB with SIPTO connectivity for the UE.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: July 18, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Gavin Bernard Horn, Andrei Dragos Radulescu, Ozcan Ozturk
  • Patent number: 9686714
    Abstract: Detecting local cell identifier collision by a base station may be achieved by receiving, at a first base station from a user device, a dedicated identifier associated with a second base station. The dedicated identifier may include or otherwise map to a user device identifier associated with the second base station and a local cell identifier associated with the second base station. Based on the dedicated identifier, it may be determined, at the first base station, that there is a local cell identifier collision between the first base station and the second base station.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: June 20, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Andrei Dragos Radulescu, Rajat Prakash