Patents by Inventor Anastasios Stamoulis
Anastasios Stamoulis 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: 10716129Abstract: 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: GrantFiled: May 17, 2019Date of Patent: July 14, 2020Assignee: QUALCOMM IncorporatedInventors: 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
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Patent number: 10681733Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) or base station communicating in an unlicensed radio frequency spectrum band may transmit a signal (e.g., a request-to-send (RTS) or clear-to-send (CTS) signal) in a licensed radio frequency spectrum band to decrease the likelihood that neighboring devices will transmit interfering communications. Specific resources may be designated in the licensed radio frequency spectrum band for transmitting these signals, and these resources may be associated with specific unlicensed channels. Signaling in the licensed radio frequency spectrum band may also carry an indication of the unlicensed channel being used or other information relevant to the unlicensed communication. The RTS/CTS signaling in licensed radio frequency spectrum band may be transmitted during a downlink transmit opportunity or an uplink transmit opportunity, or both.Type: GrantFiled: July 13, 2017Date of Patent: June 9, 2020Assignee: QUALCOMM IncorporatedInventors: Siddhartha Mallik, Taesang Yoo, Jing Sun, Anastasios Stamoulis, Aleksandar Damnjanovic, Juan Montojo
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Patent number: 10602545Abstract: Methods, systems, and devices for wireless communication are described that provide for detection and management of hidden node interference. A user equipment (UE) may provide measurement reports to a serving transmitting device to help identify the hidden node interferer in response to detecting hidden node interference. The serving transmitting device may collaborate with one or more neighboring transmitting devices, such as other transmitting devices of an operator of a wireless communications system, to identify one or more of the neighboring transmitting devices that are within an energy detect or preamble detect radius of the hidden node. The serving transmitting device may coordinate with the neighboring transmitting device(s) to determine when the hidden node may transmit, to transmit coordinated preamble transmissions to prevent the hidden node from transmitting during a transmission, or to identify a modulation and coding scheme for the transmission.Type: GrantFiled: May 10, 2017Date of Patent: March 24, 2020Assignee: Qualcomm IncorporatedInventors: Siddhartha Mallik, Taesang Yoo, Anastasios Stamoulis, Jing Sun, Aleksandar Damnjanovic, Juan Montojo
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Patent number: 10542556Abstract: Certain aspects of the present disclosure provide techniques for MCS and/or rank selection for UE jointly served by BSs in a CoMP cluster. As described herein, MCS and/or rank selection may be based, at least in part, on the inter-cluster interference and intra-cluster interference experienced by the UE. According to aspects, a CoMP scheduler may assign a UE served by BSs in a CoMP cluster to one of a first group of UEs or a second group of UEs based, at least in part, on inter-cluster and intra-cluster interference experienced by the UE. The scheduler may assign at least one of a MCS or rank selection to the UE based, at least in part, on the assigned group. The scheduler may provide an indication, to one or more BSs in the CoMP cluster, of the at least one MCS or rank selection assigned to the UE.Type: GrantFiled: September 19, 2017Date of Patent: January 21, 2020Assignee: QUALCOMM IncorporatedInventors: Siddhartha Mallik, Anastasios Stamoulis, Juan Montojo
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Publication number: 20190274157Abstract: 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: ApplicationFiled: May 17, 2019Publication date: September 5, 2019Inventors: 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
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Patent number: 10356807Abstract: 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: GrantFiled: July 6, 2015Date of Patent: July 16, 2019Assignee: QUALCOMM IncorporatedInventors: 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
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Publication number: 20180092110Abstract: Certain aspects of the present disclosure provide techniques for MCS and/or rank selection for UE jointly served by BSs in a CoMP cluster. As described herein, MCS and/or rank selection may be based, at least in part, on the inter-cluster interference and intra-cluster interference experienced by the UE. According to aspects, a CoMP scheduler may assign a UE served by BSs in a CoMP cluster to one of a first group of UEs or a second group of UEs based, at least in part, on inter-cluster and intra-cluster interference experienced by the UE. The scheduler may assign at least one of a MCS or rank selection to the UE based, at least in part, on the assigned group. The scheduler may provide an indication, to one or more BSs in the CoMP cluster, of the at least one MCS or rank selection assigned to the UE.Type: ApplicationFiled: September 19, 2017Publication date: March 29, 2018Inventors: Siddhartha MALLIK, Anastasios STAMOULIS, Juan MONTOJO
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Publication number: 20180035463Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) or base station communicating in an unlicensed radio frequency spectrum band may transmit a signal (e.g., a request-to-send (RTS) or clear-to-send (CTS) signal) in a licensed radio frequency spectrum band to decrease the likelihood that neighboring devices will transmit interfering communications. Specific resources may be designated in the licensed radio frequency spectrum band for transmitting these signals, and these resources may be associated with specific unlicensed channels. Signaling in the licensed radio frequency spectrum band may also carry an indication of the unlicensed channel being used or other information relevant to the unlicensed communication. The RTS/CTS signaling in licensed radio frequency spectrum band may be transmitted during a downlink transmit opportunity or an uplink transmit opportunity, or both.Type: ApplicationFiled: July 13, 2017Publication date: February 1, 2018Inventors: Siddhartha Mallik, Taesang Yoo, Jing Sun, Anastasios Stamoulis, Aleksandar Damnjanovic, Juan Montojo
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Publication number: 20180035462Abstract: Methods, systems, and devices for wireless communication are described that provide for detection and management of hidden node interference. A user equipment (UE) may provide measurement reports to a serving transmitting device to help identify the hidden node interferer in response to detecting hidden node interference. The serving transmitting device may collaborate with one or more neighboring transmitting devices, such as other transmitting devices of an operator of a wireless communications system, to identify one or more of the neighboring transmitting devices that are within an energy detect or preamble detect radius of the hidden node. The serving transmitting device may coordinate with the neighboring transmitting device(s) to determine when the hidden node may transmit, to transmit coordinated preamble transmissions to prevent the hidden node from transmitting during a transmission, or to identify a modulation and coding scheme for the transmission.Type: ApplicationFiled: May 10, 2017Publication date: February 1, 2018Inventors: Siddhartha Mallik, Taesang Yoo, Anastasios Stamoulis, Jing Sun, Aleksandar Damnjanovic, Juan Montojo
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Publication number: 20170332338Abstract: Synchronization techniques for wireless nodes in a shared radio frequency spectrum band may include performing a listen before talk (LBT) procedure (e.g., a clear channel assessment (CCA) procedure) at identified resynchronization boundaries and initiating transmissions following successful LBT procedures. In the event that a node loses synchronization between resynchronization boundaries, such as due to an unsuccessful LBT procedure, the node becomes unsynchronized and may initiate an LBT procedure separate from the other nodes of the set of nodes. At a subsequent resynchronization boundary, the unsynchronized node may perform a resynchronization procedure in order to again become synchronized with other nodes of the set of nodes. In cases where the resynchronization procedure is unsuccessful, a parameter associated with the resynchronization procedure may be adapted to increase an interval for performing the resynchronization procedure.Type: ApplicationFiled: April 13, 2017Publication date: November 16, 2017Inventors: Siddhartha Mallik, Anastasios Stamoulis, Aleksandar Damnjanovic, Juan Montojo
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Patent number: 9706572Abstract: Techniques are described for wireless communication. One method includes implementing, at a first node, a first access protocol to contend for access to a wireless communication medium shared by a plurality of nodes; determining whether a triggering event has occurred; and implementing, at the first node, a second access protocol to contend for access to the wireless communication medium based at least in part on a determination that the triggering event has occurred.Type: GrantFiled: February 10, 2015Date of Patent: July 11, 2017Assignee: QUALCOMM IncorporatedInventors: Naga Bhushan, Durga Prasad Malladi, Ahmed Kamel Sadek, Kiran Kumar Somasundaram, Anastasios Stamoulis, Aleksandar Damnjanovic, Yongbin Wei, Dexu Lin
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Patent number: 9531494Abstract: Techniques are described for wireless communication. A first method may include transmitting a reference signal from an access point over a shared spectrum to a user equipment (UE), and receiving a measurement of the reference signal from the UE. A second method may include receiving at a UE over a shared spectrum a reference signal from an access point, and transmitting a measurement of the reference signal to the access point. In each of the first and second methods, the measurement may indicate interference with the shared spectrum from outside of a clear channel assessment (CCA) range of the access point.Type: GrantFiled: February 24, 2015Date of Patent: December 27, 2016Assignee: QUALCOMM IncorporatedInventors: Kiran Kumar Somasundaram, Dexu Lin, Naga Bhushan, Aleksandar Damnjanovic, Wanshi Chen, Peter Gaal, Anastasios Stamoulis, Gavin Bernard Horn, Onkar Dabeer, Yongbin Wei, Durga Prasad Malladi, Tingfang Ji, Hao Xu
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Publication number: 20160057770Abstract: 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: ApplicationFiled: July 6, 2015Publication date: February 25, 2016Inventors: 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
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Patent number: 9265047Abstract: Aspects of the present disclosure relate to techniques for activating opportunistic relays. A combination of uplink and downlink pilots may be used to switch on user equipment relays (UeNBs) in an effort to make more accurate measurements in an effort to enable handovers. According to aspects of the present disclosure, a relay may evaluate one or more channel conditions, determine whether or not to transmit downlink reference signals to a UE based on the evaluation, and transmit downlink reference signals to the UE based on the determination. According to aspects, a relay may determine a set of resources reserved for transmission of uplink pilots by UEs, monitor the set of resources to detect transmission of uplink pilots, and report, to an eNB, a power at which the uplink pilots were received.Type: GrantFiled: March 14, 2013Date of Patent: February 16, 2016Assignee: QUALCOMM IncorporatedInventors: Siddhartha Mallik, Naga Bhushan, Aleksandar Damnjanovic, Kiran Somasundaram, Anastasios Stamoulis
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Patent number: 9204428Abstract: Systems and methods are described that facilitate evaluating conditions of nodes (e.g., access points, access terminals, etc.) in a wireless communication environment to determine a level of disadvantage for a given node relative to other nodes. A first node may receive a resource utilization message (RxRUM) and may determine a level of disadvantage for a node that sent the RxRUM. The first node may then compare its own level of disadvantage to the sending node in order to permit a determination of an appropriate course of action in response to the RxRUM.Type: GrantFiled: October 26, 2006Date of Patent: December 1, 2015Assignee: QUALCOMM IncorporatedInventors: Rajarshi Gupta, Ashwin Sampath, David Jonathan Julian, Gavin Horn, Anastasios Stamoulis, Nikhil Jain, Husheng Li, Rajat Prakash
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Publication number: 20150319784Abstract: Techniques are described for wireless communication. One method includes implementing, at a first node, a first access protocol to contend for access to a wireless communication medium shared by a plurality of nodes; determining whether a triggering event has occurred; and implementing, at the first node, a second access protocol to contend for access to the wireless communication medium based at least in part on a determination that the triggering event has occurred.Type: ApplicationFiled: February 10, 2015Publication date: November 5, 2015Inventors: Naga Bhushan, Durga Prasad Malladi, Ahmed Kamel Sadek, Kiran Kumar Somasundaram, Anastasios Stamoulis, Aleksandar Damnjanovic, Yongbin Wei, Dexu Lin
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Publication number: 20150280847Abstract: Techniques are described for wireless communication. A first method may include transmitting a reference signal from an access point over a shared spectrum to a user equipment (UE), and receiving a measurement of the reference signal from the UE. A second method may include receiving at a UE over a shared spectrum a reference signal from an access point, and transmitting a measurement of the reference signal to the access point. In each of the first and second methods, the measurement may indicate interference with the shared spectrum from outside of a clear channel assessment (CCA) range of the access point.Type: ApplicationFiled: February 24, 2015Publication date: October 1, 2015Inventors: Kiran Kumar Somasundaram, Dexu Lin, Naga Bhushan, Aleksandar Damnjanovic, Wanshi Chen, Peter Gaal, Anastasios Stamoulis, Gavin Bernard Horn, Onkar Dabeer, Yongbin Wei, Durga Prasad Malladi, Tingfang Ji, Hao Xu
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Publication number: 20150270925Abstract: A modulation and coding scheme (MCS) is selected for one or more transmissions from a first wireless device to a second wireless device, based at least in part on interference at the second wireless device during a time period. The interference excludes wireless signals present at the second wireless device at first times during the time period when the first wireless device is transmitting and at second times during the time period when the first wireless device detects transmissions.Type: ApplicationFiled: March 18, 2014Publication date: September 24, 2015Applicant: QUALCOMM IncorporatedInventors: Dexu Lin, Jelena Damnjanovic, Anastasios Stamoulis, Yongbin Wei, Kiran K. Somasundaram, Shi Cong Yang
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Patent number: 9137802Abstract: Techniques for scheduling UEs are described. In one design, a scheduler (e.g., for a cell) may receive channel direction information (CDI) and channel strength information (CSI) from a plurality of UEs. In one design, the CDI from each UE may include at least one eigenvector, and the CSI from each UE may include at least one singular value corresponding to the at least one eigenvector. The scheduler may schedule at least one UE among the plurality of UEs for data transmission based on the CDI and CSI from the plurality of UEs. The scheduler may select the at least one UE based on a metric related to signal-to-leakage ratio (SLR), or spectral efficiency, etc. In one design, the scheduler may evaluate the performance of different sets of UEs to determine whether to schedule one UE for single-user MIMO or multiple UEs for multi-user MIMO.Type: GrantFiled: August 16, 2010Date of Patent: September 15, 2015Assignee: QUALCOMM IncorporatedInventors: Stefan Geirhofer, Amir Farajidana, Tingfang Ji, Alexei Yurievitch Gorokhov, Anastasios Stamoulis
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Patent number: 9078270Abstract: Systems and methodologies are described that facilitate providing opportunistic relay node communication based on scheduling of other communications in a wireless network. In particular, a relay node can maintain a backhaul link with an access point and an access link with a mobile device to facilitate communicating information therebetween. Time slots during which the backhaul link is active can be determined and avoided during scheduling access link communications with the mobile device. Furthermore, resource assignments from the access point to the mobile device can be monitored and decoded such that time slots associated therewith can also be determined and avoided. Thus, the relay node can communicate with mobile devices in time slots where the backhaul link is inactive and/or the mobile devices are not occupied communicating directly with the access point.Type: GrantFiled: June 11, 2009Date of Patent: July 7, 2015Assignee: QUALCOMM IncorporatedInventors: Tingfang Ji, Kambiz Azarian Yazdi, Dexu Lin, Anastasios Stamoulis, Arnab Chakrabarti