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).
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Patent number: 11197166Abstract: Synchronous communications mode detection is disclosed for unlicensed spectrum communications. To detect synchronous mode communications, an observing node monitors on-off transitions of communication transmissions on a shared communication spectrum. The observing node detects the on-off transition spacing of the on-off transitions over a sliding window of a detection period duration. The node may determine the number of candidate synchronous on-off transition spacings of the detected on-off transition spacings that are equal to an integer multiple of a synchronization period. If the number of candidate synchronous on-off transition spacings exceeds a threshold value the observing node will declare detection of a synchronous operation mode of the shared communication spectrum.Type: GrantFiled: May 11, 2020Date of Patent: December 7, 2021Assignee: QUALCOMM IncorporatedInventors: Aleksandar Damnjanovic, Andrei Dragos Radulescu, Yongbin Wei
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Patent number: 11190234Abstract: Techniques providing opportunistic frequency switching for frame based equipment (FBE), such as may be configured to minimize opportunistic frequency switching delay in FBE new radio (NR) unlicensed (NR-U) networks and/or to provide frequency diversity FBE access based on offset sequences of medium sensing occasions for the carrier frequencies are disclosed. Within the FBE mode network, a base station may configure a pattern of sensing locations in each frame for each frequency transmission unit of the plurality of frequency transmission units, wherein an inter-unit delay of sensing locations between a first frequency transmission unit and a next adjacent frequency transmission unit and between a last frequency transmission unit and the first frequency transmission unit is a fixed duration.Type: GrantFiled: April 16, 2019Date of Patent: November 30, 2021Assignee: QUALCOMM IncorporatedInventors: Aleksandar Damnjanovic, Srinivas Yerramalli, Xiaoxia Zhang, Tamer Kadous, Yongbin Wei, Jing Sun, Andrei Dragos Radulescu
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Patent number: 11153826Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit procedure-specific uplink power parameters to one or more user equipments (UEs) in a cell. A UE may determine a procedure including one or more uplink transmissions. The UE may determine a transmit power level corresponding to the procedure based at least in part on the procedure-specific uplink power parameters. The UE may transmit the one or more uplink transmissions using the determined transmit power level.Type: GrantFiled: July 11, 2018Date of Patent: October 19, 2021Assignee: QUALCOMM IncorporatedInventors: Sumeeth Nagaraja, Andrei Dragos Radulescu, Tao Luo, Sony Akkarakaran, Makesh Pravin John Wilson, Xiao Feng Wang, Shengbo Chen
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Patent number: 11115161Abstract: Scheduling around frame based equipment (FBE) idle periods reduces the flexibility of scheduling and partitioning. This leads to a latency caused by waiting for the next downlink scheduling opportunity and skipping over unused uplink scheduling slots. According to certain aspects, to reduce overhead caused by idle time and ensure full downlink scheduling, a base station (BS) alternates between idle periods and channel occupancy time every fixed frame period with one or more other synchronized BSs, between components carriers of the BS, or both. Thus, a BS can always schedule downlink on a carrier during an idle period scheduled for a different BS and/or a different carrier.Type: GrantFiled: May 1, 2019Date of Patent: September 7, 2021Assignee: QUALCOMM IncorporatedInventors: Andrei Dragos Radulescu, Srinivas Yerramalli, Xiaoxia Zhang, Aleksandar Damnjanovic, Tamer Kadous, Jing Sun, Yongbin Wei
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Publication number: 20210250779Abstract: 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: ApplicationFiled: April 28, 2021Publication date: August 12, 2021Inventors: Xiaoxia Zhang, Zhifei Fan, Andrei Dragos Radulescu, Srinivas Yerramalli, Tamer Kadous
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Patent number: 11089575Abstract: In various aspects, a base station and user equipment (UE) exchange an indication of UE capabilities and a monitoring schedule for the UE to monitor an integer M frequency band partitions for a predetermined signal. The base station performs one or more successful clear carrier assessments (CCAs) on an integer N frequency band partitions of the M frequency band partitions, wherein N<M, and maps one or more downlink transmissions to only the N frequency band partitions. Based on the mapping, the base station transmits the predetermined signal on only the N frequency band partitions, followed by a downlink signal during a transmission opportunity (TXOP). The UE cycles through the M frequency band partitions while monitoring for the predetermined signal according to the monitoring schedule, detects the predetermined signal on only the integer N frequency band partitions, and tunes to receive the downlink signal during the TXOP.Type: GrantFiled: April 10, 2019Date of Patent: August 10, 2021Assignee: QUALCOMM IncorporatedInventors: Srinivas Yerramalli, Aleksandar Damnjanovic, Xiaoxia Zhang, Tamer Kadous, Chih-Hao Liu, Seyed Ali Akbar Fakoorian, Andrei Dragos Radulescu
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Publication number: 20210211886Abstract: Methods, systems, and devices for wireless communications are described in which wireless nodes may use licensed shared radio frequency spectrum band for communications and one or more neighboring networks may use a same licensed shared radio frequency spectrum band. A second network of the one or more neighboring networks may have priority of use of the licensed shared radio frequency spectrum band within a particular geographic area. Disclosed techniques provide that nodes of each network may indicate an identification of the network, a network priority, or both, in over-the-air signaling. Wireless nodes may determine if another neighboring network is present based on the over-the-air signaling, may determine whether the other network has a higher priority, and may adjust one or more transmissions in the event that a higher priority network is identified, such as through reducing transmission power.Type: ApplicationFiled: January 7, 2021Publication date: July 8, 2021Inventors: Aleksandar Damnjanovic, Andrei Dragos Radulescu, Xiaoxia Zhang
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Patent number: 11019504Abstract: 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: GrantFiled: April 2, 2019Date of Patent: May 25, 2021Assignee: QUALCOMM IncorporatedInventors: Xiaoxia Zhang, Zhifei Fan, Jing Sun, Andrei Dragos Radulescu, Srinivas Yerramalli, Tamer Kadous
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Publication number: 20210153144Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may transmit, and a user equipment (UE) may receive, a bitmap that includes a bit sequence to indicate a synchronization signal block (SSB) transmission pattern. The UE may perform rate matching around one or more candidate SSB positions in an initial portion of a window in which SSB transmission is expected, based at least in part on the bitmap, a first parameter indicating a quantity of initial candidate SSB positions in the window subject to rate matching, and a second parameter indicating a quantity of initial bits in the bit sequence that define the SSB transmission pattern. Numerous other aspects are provided.Type: ApplicationFiled: November 13, 2020Publication date: May 20, 2021Inventors: Andrei Dragos RADULESCU, Jing SUN, Xiaoxia ZHANG
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Publication number: 20210144755Abstract: In an aspect, the present disclosure includes a method, apparatus, and computer readable medium for wireless communications for receiving, from a network entity, a configured grant associated with a listen-before-talk (LBT) procedure; determining a transmission priority on the configured grant associated with the LBT procedure; and determining a logical channel based on the transmission priority on the configured grant, wherein determining the logical channel further comprises determining that a scheduled transmission includes one or more signaling data transmissions on the configured grant, the one or more signaling data transmissions corresponding to at least one of a signaling radio bearer 0 (SRB0), SRB1, and SRB3; adjusting a priority level for the one or more signaling data transmissions to a highest priority level corresponding to a higher channel access priority class; and transmitting, to the network entity, on the configured logical channel of the configured grant after successfully performing the LBType: ApplicationFiled: November 5, 2020Publication date: May 13, 2021Inventors: Ozcan OZTURK, Jing SUN, Xiaoxia ZHANG, Andrei Dragos RADULESCU
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Publication number: 20210144760Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a bandwidth part (BWP) to switch to after identifying consistent uplink listen-before-talk (LBT) failures on a first BWP based on parameters indicated by a base station. For example, the base station may transmit a switching parameter to the UE that the UE then uses to switch to a second BWP based on identifying the consistent uplink LBT failures on the first BWP. Subsequently, after selecting the second BWP, the UE may attempt to use the second BWP for uplink transmissions (e.g., after performing a random access procedure). Additionally, the UE may indicate the consistent uplink LBT failures to a base station associated with the failed BWP based on a type of cell that is using that failed BWP.Type: ApplicationFiled: November 5, 2020Publication date: May 13, 2021Inventors: Ozcan Ozturk, Xiaoxia Zhang, Jing Sun, Andrei Dragos Radulescu
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Publication number: 20210119748Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station serving the UE in a first network, a power control configuration and a reference signal measurement configuration. The UE may receive, based at least in part on the reference signal measurement configuration, a reference signal from at least one wireless device of a second network. The UE may determine, based at least in part on the power control configuration and the received reference signal, an interference level for the second network introduced by the first network. The UE may adjust a transmission power limit for the UE based at least in part on the determined interference level and the power control configuration. The UE may transmit signals to the base station according to the adjusted transmission power limit.Type: ApplicationFiled: October 15, 2020Publication date: April 22, 2021Inventors: Aleksandar Damnjanovic, Andrei Dragos Radulescu, Seyed Ali Akbar Fakoorian
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Publication number: 20210091851Abstract: Disclosed are techniques for determining a distance (or range) between a first wireless entity and a second wireless entity. In an aspect, the first wireless entity transmits a first positioning reference signaling (PRS) signal to the second wireless entity at a first time, where the first PRS signal is received by the second wireless entity at a second time, and receives a second PRS signal from the second wireless entity at a third time, where the second PRS signal is transmitted by the second wireless entity at a fourth time. The first wireless entity enables the distance to be determined by a location computing entity, for example, by a location server, based on the first, second, third, and fourth times. The first wireless entity may be a mobile device or a base station and the second wireless entity may be the other of the mobile device or base station.Type: ApplicationFiled: December 10, 2020Publication date: March 25, 2021Inventors: Andrei Dragos RADULESCU, Hem AGNIHOTRI, Stephen William EDGE, Sven FISCHER, Bapineedu Chowdary GUMMADI, Venkata A Naidu BABBADI
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Publication number: 20210092627Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) and base station may communicate in on a wireless channel of an unlicensed radio frequency spectrum band. The base station may transmit synchronization signal blocks (SSBs) in a discovery reference signal (DRS) slot. The base station may multiplex a channel state information (CSI) reference signal (CSI-RS). The base station may multiplex an aperiodic CSI-RS or a periodic CSI-RS with the SSBs in the DRS slot. For an aperiodic CSI-RS, the base station may separately trigger the CSI-RS measurement and CSI-RS reporting. For periodic CSI-RS, the base station may transmit an indication of whether the periodic CSI-RS is present.Type: ApplicationFiled: September 17, 2020Publication date: March 25, 2021Inventors: Andrei Dragos Radulescu, Jing Sun, Kapil Bhattad, Xiaoxia Zhang
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Patent number: 10959267Abstract: Random access channel (RACH) configurations for new radio (NR) shared spectrum (NR-SS) networks are disclosed. A base station may perform a listen before talk (LBT) procedure on a shared communication channel at a beginning of a discovery measurement timing configuration (DMTC) window. In response to a successful LBT, the base station may transmit synchronization signals over a plurality of directional beams according to a predetermined sequence. The user equipment (UE) may determine the predetermined sequence through the detected synchronization signals. The base station may signal configuration of additional random access resources when the LBT procedure delays beyond dedicated random access resources. The base station may then monitor for UEs to transmit random access signals from each direction corresponding to directional beams within the additional random access resources according to the predetermined sequence.Type: GrantFiled: July 26, 2018Date of Patent: March 23, 2021Assignee: QUALCOMM IncorporatedInventors: Aleksandar Damnjanovic, Andrei Dragos Radulescu, Tamer Kadous, Srinivas Yerramalli
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Patent number: 10952142Abstract: 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: GrantFiled: June 26, 2017Date of Patent: March 16, 2021Assignee: QUALCOMM IncorporatedInventors: Andrei Dragos Radulescu, Alexei Yurievitch Gorokhov, Chengjin Zhang, Chirag Sureshbhai Patel, Tamer Kadous
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Publication number: 20210068106Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a plurality of semi-persistent scheduling (SPS) configurations corresponding to a plurality of SPS occasions for reception of a physical downlink shared channel (PDSCH) in a slot; decode a first SPS occasion, of the plurality of SPS occasions, to attempt to receive the PDSCH in the slot; and selectively decode a second SPS occasion, of the plurality of SPS occasions, to attempt to receive the PDSCH in the slot. Numerous other aspects are provided.Type: ApplicationFiled: July 31, 2020Publication date: March 4, 2021Inventors: Aleksandar DAMNJANOVIC, Seyed Ali Akbar FAKOORIAN, Andrei Dragos RADULESCU
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Patent number: 10887005Abstract: Disclosed are techniques for determining a distance (or range) between a first wireless entity and a second wireless entity. In an aspect, the first wireless entity transmits a first positioning reference signaling (PRS) signal to the second wireless entity at a first time, where the first PRS signal is received by the second wireless entity at a second time, and receives a second PRS signal from the second wireless entity at a third time, where the second PRS signal is transmitted by the second wireless entity at a fourth time. The first wireless entity enables the distance to be determined by a location computing entity, for example, by a location server, based on the first, second, third, and fourth times. The first wireless entity may be a mobile device or a base station and the second wireless entity may be the other of the mobile device or base station.Type: GrantFiled: September 27, 2019Date of Patent: January 5, 2021Assignee: QUALCOMM IncorporatedInventors: Andrei Dragos Radulescu, Hem Agnihotri, Stephen William Edge, Sven Fischer, Bapineedu Chowdary Gummadi, Venkata A Naidu Babbadi
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Patent number: 10869239Abstract: Methods, systems, and devices for wireless communications are described that provide for mobility between base stations for a UE that may be in a coverage extension (CE) mode or a non-CE mode. A serving base station may provide a UE with an indication of one or more neighboring base stations within a same public mobile land network (PLMN). The UE may then prioritize base stations in the same PLMN ahead of other neighboring base stations within a same frequency priority in a reselection procedure. In some cases, a base station may allocate PLMN-specific CE mode random access resources and transmit CE mode broadcast transmissions upon request from a UE within the PLMN. In some cases, a UE operating in CE mode may use contention-based random access resources for random access requests rather than dedicated random access resources.Type: GrantFiled: May 8, 2019Date of Patent: December 15, 2020Assignee: QUALCOMM IncorporatedInventors: Zhifei Fan, Xiaoxia Zhang, Jing Sun, Andrei Dragos Radulescu
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Publication number: 20200374702Abstract: Synchronous communications mode detection is disclosed for unlicensed spectrum communications. To detect synchronous mode communications, an observing node monitors on-off transitions of communication transmissions on a shared communication spectrum. The observing node detects the on-off transition spacing of the on-off transitions over a sliding window of a detection period duration. The node may determine the number of candidate synchronous on-off transition spacings of the detected on-off transition spacings that are equal to an integer multiple of a synchronization period. If the number of candidate synchronous on-off transition spacings exceeds a threshold value the observing node will declare detection of a synchronous operation mode of the shared communication spectrum.Type: ApplicationFiled: May 11, 2020Publication date: November 26, 2020Inventors: Aleksandar Damnjanovic, Andrei Dragos Radulescu, Yongbin Wei