Patents by Inventor Nachiappan VALLIAPPAN

Nachiappan VALLIAPPAN 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: 10405242
    Abstract: Techniques for managing channel reservation on a shared communication medium are disclosed. An access point or an access terminal contending for access to a communication medium shared between a first Radio Access Technology (RAT) and a second RAT, for example, may encode a first portion of a channel reservation message defined by the first RAT with a transmission opportunity duration associated with the second RAT and also encode a second portion of the channel reservation message with the transmission opportunity duration. The access point or the access terminal may then transmit, over the communication medium, the channel reservation message including the first and second portions to reserve the communication medium based on the contending.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: September 3, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Tamer Adel Kadous, Nachiappan Valliappan
  • Publication number: 20190268779
    Abstract: A method for detecting coverage problems is provided. The method includes receiving, at data processing hardware, from at least one user equipment (UE), observations. Each observation includes a signal measurement of a signal emitted from a base station and a corresponding location of the signal measurement. The method also includes generating, by the data processing hardware, a coverage map for the base station based on the received observations, the coverage map indicating a signal characteristic of the emitted signal about the base station. The method further includes determining, by the data processing hardware, an estimated characteristic of the base station by feeding the coverage map into a neural network configured to output the estimated characteristic of the base station.
    Type: Application
    Filed: February 23, 2018
    Publication date: August 29, 2019
    Applicant: Google LLC
    Inventors: James Peroulas, Sharath Ananth, Nachiappan Valliappan
  • Patent number: 10374777
    Abstract: Techniques for communication are disclosed. A method may include selecting from a subframe two or more resource elements for control signaling, wherein the subframe includes a plurality of symbol periods and each symbol period includes a plurality of resource elements, wherein the selected two or more resource elements are associated with a concurrent symbol period, and transmitting a resource allocation message to an access terminal, wherein the resource allocation message indicates that the selected two or more resource elements are allocated for control signaling.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: August 6, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Tamer Adel Kadous, Chirag Sureshbhai Patel, Ahmed Kamel Sadek, Nachiappan Valliappan, Tao Luo, Alexei Yurievitch Gorokhov
  • Publication number: 20190239243
    Abstract: Techniques for managing access to a shared communication medium are disclosed. Scheduling grants may be sent to different access terminals for different sets of resources for uplink transmission on the communication medium. A series of re-contention gaps may be scheduled for access terminal contention within or between the different sets of resources. Uplink and downlink transmission on the communication medium may be silenced during each of the series of re-contention gaps. Moreover, an access terminal may receive a scheduling grant that allocates a set of resources to the access terminal for uplink transmission on a communication medium and contend for access to the communication medium based on the scheduling grant. The access terminal may then selectively transmit uplink traffic over the allocated set of resources based on the contending.
    Type: Application
    Filed: April 12, 2019
    Publication date: August 1, 2019
    Inventors: Ahmed SADEK, Nachiappan VALLIAPPAN, Tamer KADOUS, Chirag PATEL, Tao LUO
  • Patent number: 10356816
    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: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Nachiappan Valliappan, Ahmed Kamel Sadek, Peter Gaal, Tamer Adel Kadous, Andrei Dragos Radulescu
  • Patent number: 10356623
    Abstract: Aspects for reducing interference between networks are provided. A signal transmitted by a first network over a communications medium using an unlicensed frequency spectrum is decoded to determine one or more parameters of a packet in the signal. A level of utilization of the communications medium by the first network can be estimated based at least in part on a signal strength of the signal and the one or more parameters. A time for communicating in a second network over the communications medium using the unlicensed frequency spectrum can be adjusted based at least in part on the level of utilization of the communications medium by the first network.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Ahmed Kamel Sadek, Mohammad Naghshvar, Nachiappan Valliappan
  • Patent number: 10334546
    Abstract: Techniques for synchronization on a shared communication medium are disclosed. An access point may select, for example, a common sequence, frequency, and time for a first synchronization signal that is coordinated with one or more other access points. The access point may then transmit the first synchronization signal in accordance with the common sequence, frequency, and time. An access terminal may receive, from an access point, a first synchronization signal having a first sequence and a second synchronization signal having a second sequence. The access terminal may then determine an offset in time between the first synchronization signal and the second synchronization signal, and determine a cell identifier group associated with the access point based on the offset.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: June 25, 2019
    Assignee: Qualcomm Incorporated
    Inventors: Arumugam Chendamarai Kannan, Tao Luo, Ahmed Kamel Sadek, Nachiappan Valliappan, Chirag Sureshbhai Patel, Mingxi Fan, Tamer Adel Kadous
  • Patent number: 10299284
    Abstract: Techniques for managing access to a shared communication medium are disclosed. Scheduling grants may be sent to different access terminals for different sets of resources for uplink transmission on the communication medium. A series of re-contention gaps may be scheduled for access terminal contention within or between the different sets of resources. Uplink and downlink transmission on the communication medium may be silenced during each of the series of re-contention gaps. Moreover, an access terminal may receive a scheduling grant that allocates a set of resources to the access terminal for uplink transmission on a communication medium and contend for access to the communication medium based on the scheduling grant. The access terminal may then selectively transmit uplink traffic over the allocated set of resources based on the contending.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: May 21, 2019
    Assignee: QUALCOMM, Incorporated
    Inventors: Ahmed Kamel Sadek, Nachiappan Valliappan, Tamer Adel Kadous, Chirag Sureshbhai Patel, Tao Luo
  • Patent number: 10291379
    Abstract: Techniques for managing contention on a shared communication medium are disclosed. Various techniques are provided to facilitate aspects such as reference signaling, downlink medium access, uplink medium access, resource reuse, channel structures, acknowledgment schemes, fairness, acquisition, random access, paging, mobility, inter-operator mitigation, and so on for a frame structure implemented on the shared communication medium.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: May 14, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Tamer Adel Kadous, Nachiappan Valliappan, Ahmed Kamel Sadek, Andrei Dragos Radulescu
  • Patent number: 10219300
    Abstract: Techniques for reservation coordination on a shared communication medium are disclosed. An access point, for example, may contend for access to a communication medium, and transmit a channel reservation message in accordance with a first Radio Access Technology (RAT) to reserve the communication medium for a transmission opportunity (TXOP) duration based on the contending. The access point may then transmit, during the reserved TXOP duration, a reservation coordination signal in accordance with a second RAT to convey reservation coordination information associated with the reserved TXOP duration.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: February 26, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Alexei Gorokhov, Peter Gaal, Nachiappan Valliappan, Chirag Patel, Ahmed Sadek, Brian Banister, Tao Luo, Tamer Kadous
  • Patent number: 10201014
    Abstract: Techniques for managing contention on a shared communication medium are disclosed. Various techniques are provided to facilitate aspects such as reference signaling, downlink medium access, uplink medium access, resource reuse, channel structures, acknowledgment schemes, fairness, acquisition, random access, paging, mobility, inter-operator mitigation, and so on for a frame structure implemented on the shared communication medium.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: February 5, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Tamer Adel Kadous, Nachiappan Valliappan, Ahmed Kamel Sadek, Andrei Dragos Radulescu
  • Patent number: 10153970
    Abstract: Systems and methods for co-existence between wireless Radio Access Technologies (RATs) employing channel reservation on a shared communication medium are disclosed. One or more channel reservation messages defined for a first RAT may be received to reserve the communication medium for a reservation duration, with the communication medium comprising a plurality of component channels. A first component channel may be determined among the plurality of component channels to be protected for operation of a second RAT in accordance with the one or more channel reservation messages. Communication via the first RAT may nevertheless proceed on a second component channel among the plurality of component channels during the reservation duration.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: December 11, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Nachiappan Valliappan, Ahmed Kamel Sadek
  • Patent number: 10110337
    Abstract: Aspects for reducing interference between networks are provided. A signal transmitted by one or more devices in a first network over a communications medium using an unlicensed frequency spectrum is decoded to determine one or more parameters of a packet in the signal. A level of utilization of the communications medium by the one or more devices in the first network can be estimated based at least in part on a signal strength of the signal and the one or more parameters. A period of time for communicating in a second network over the communications medium using the unlicensed frequency spectrum can be adjusted based at least in part on the level of utilization of the communications medium by the first network.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: October 23, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Mohammad Naghshvar, Ahmed Kamel Sadek, Nachiappan Valliappan
  • 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
  • Patent number: 10080159
    Abstract: Systems and methods for dynamic bandwidth management for load-based equipment in unlicensed spectrum are disclosed. In an aspect, the disclosure provides a method for dynamic bandwidth management. The method includes obtaining training data by monitoring a plurality of channels in an unlicensed spectrum during a training period. The method further includes determining that at least a first channel of the plurality of channels is available for a transmission. The method also includes determining, based on the training data, whether to wait for an additional channel of the plurality of channels to become available for the transmission. Determining whether to wait may be based on either training data including probabilities that no additional channel is to become available within a transmission opportunity or a machine learning classification of a current state of the backoff counters based on training data including samples of previous states of backoff counters.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: September 18, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Nachiappan Valliappan, Kiran Somasundaram, Ahmed Kamel Sadek
  • Patent number: 9986574
    Abstract: Techniques for channel selection and related operations in a shared spectrum environment are disclosed. In one example, a channel selector or the like may be used to select one of a number of available channels as an operating channel based on a comparison of cost functions for each of the available channels, with the cost functions being based on separate utility and penalty metrics. In another example, a channel scanner or the like may be used to trigger a channel scan in response to a channel quality metric indicating poor service for a threshold number or proportion of access terminals. In another example, an operating mode controller may be used to trigger a Time Division Multiplexing (TDM) mode on an operating channel in response to a utilization metric being above a threshold. The TDM mode may cycle operation between activated and deactivated periods in accordance with a TDM communication pattern.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: May 29, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Ping Xia, Ahmed Kamel Sadek, Nachiappan Valliappan
  • Patent number: 9967833
    Abstract: Adaption of a Basic Service Set (BSS) Basic Rate Set for a Wireless Local Area Network (WLAN) Access Point (AP) may be achieved by, for example, determining a transmission power metric for one or more Subscriber Stations (STAs) associated with the AP, modifying one or more data rates in the BSS Basic Rate Set for the AP based on the transmission power metric, and transmitting the modified BSS Basic Rate Set to the one or more STAs.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: May 8, 2018
    Assignee: QUALCOMM, Incorporated
    Inventors: Nachiappan Valliappan, Ahmed Kamel Sadek
  • Patent number: 9955482
    Abstract: Systems and methods for improved interference management by Wi-Fi devices are disclosed. The interference management may be achieved by monitoring, by the Wi-Fi device, signaling energy on a communication channel in a frequency band associated with the Wi-Fi device, comparing the monitored signal energy with a known waveform signature corresponding to Long Term Evolution (LTE) operation, and identifying a presence of an LTE interferer on the communication channel in the frequency band associated with the Wi-Fi device based on the comparison.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: April 24, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Nachiappan Valliappan, Ahmed Kamel Sadek
  • 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
  • Publication number: 20180054762
    Abstract: Techniques for managing channel reservation on a shared communication medium are disclosed. An access point or an access terminal contending for access to a communication medium shared between a first Radio Access Technology (RAT) and a second RAT, for example, may encode a first portion of a channel reservation message defined by the first RAT with a transmission opportunity duration associated with the second RAT and also encode a second portion of the channel reservation message with the transmission opportunity duration. The access point or the access terminal may then transmit, over the communication medium, the channel reservation message including the first and second portions to reserve the communication medium based on the contending.
    Type: Application
    Filed: September 8, 2016
    Publication date: February 22, 2018
    Inventors: Tamer Adel KADOUS, Nachiappan VALLIAPPAN