Patents by Inventor Krishna Sitaram

Krishna Sitaram 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: 10075268
    Abstract: Systems and methods are described for performing carrier aggregation for a wireless device proximate to an antenna system. An uplink signal may be received at an access node from a wireless device in communication with the access node. It may be detected that the wireless device is proximate to an antenna system, wherein the antenna system does not comprise the access node. It may be then determined that carrier aggregation should be triggered for the wireless device based on the detecting. And carrier aggregation may be performed for the wireless device by transmitting data from the access node to the wireless device over a primary carrier and a secondary carrier.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: September 11, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth Pawar, Krishna Sitaram, Pratik Kothari, Chunmei Liu
  • Patent number: 10070340
    Abstract: Example methods and an example controller for controlling a bit rate at which a media server streams media content to a UE are provided. The example controller includes at least one processing unit and data storage having instructions executable by the processing unit to carry out operations. The operations include determining an extent to which the UE provides wireless backhaul connectivity between its serving base station and at least one device other than the UE. Further, the operations include, based on the determined extent, (i) establishing the bit rate and (ii) causing the media server to stream a portion of media content to the UE at the established bit rate.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: September 4, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth B. Pawar, Shilpa K. Srinivas, Krishna Sitaram, Chunmei Liu
  • Patent number: 10064166
    Abstract: According to aspects of the disclosure, a method and system are provided for managing signaling in a wireless communication network. In accordance with the disclosure, a base station serves a plurality of user equipment devices (UEs) via an air interface extending between the base station and the UEs. The base station also receives, on an uplink of the air interface, a report from each UE indicating channel state information (CSI). The base station periodically receives the report from each UE according to a CSI reporting rate specified by the base station for the UE. The base station may determine that a level of loading on the uplink is greater than a threshold load value. Responsive to such determination, the base station selects a subset of the plurality of UEs and reduces the CSI reporting rate for the selected subset of the plurality of UEs to reduce congestion on the uplink.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: August 28, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Chunmei Liu, Pratik Kothari, Hemanth B. Pawar, Krishna Sitaram
  • Patent number: 10045359
    Abstract: A method and system for dynamically controlling when a base station will provide a UE with carrier aggregation service rather than serving the UE on just a single carrier. The base station dynamically invokes carrier aggregation service for the UE in response to detecting simultaneous voice and data communication by the UE. And the base station dynamically discontinues providing carrier aggregation service for the UE, and transitions to serving the UE on just a single carrier, in response to detecting that the UE's simultaneous voice and data communication has ended and that the UE is engaged in just voice communication or just data communication.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: August 7, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Krishna Sitaram, Chunmei Liu, Hemanth B. Pawar, Pratik Kothari
  • Patent number: 10044426
    Abstract: Transmission mode selection operations include determining that a first wireless device out of a plurality of wireless devices connected to an access node qualifies for a beamforming transmission mode, determining that a pair of wireless devices out of the plurality of wireless devices qualifies for a multi-user multiple-input multiple-output (MU-MIMO) transmission mode, prioritizing each of the first wireless device and the pair of wireless devices based on one or more of a content type, a device type, or a device capability, and selecting one downlink transmission mode from the beamforming transmission mode and the MU-MIMO transmission mode based on the prioritizing.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: August 7, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth Pawar, Chunmei Liu, Krishna Sitaram, Pratik Kothari
  • Patent number: 10045151
    Abstract: Systems and methods are described for triggering transmission bundling for participant wireless devices of an antenna system. An uplink signal may be received at an access node from a wireless device in communication with the access node. It may be detected that the wireless device is proximate to an antenna system in communication with one or more participant wireless devices, wherein the antenna system does not comprise the access node. It may be then determined that transmission bundling should be triggered for the participant wireless device based on the detecting. And the participating wireless devices may be instructed to perform transmission bundling.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: August 7, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth Pawar, Shilpa Kowdley, Krishna Sitaram, Chunmei Liu
  • Patent number: 10034292
    Abstract: Allocating resources in a wireless network includes monitoring usage of each of a control channel and a data channel, determining that at least the usage of the data channel exceeds a capacity of the data channel, determining a usage of each of the control channel and the data channel operating in MU-MIMO mode, determining that the usage of the control channel in the MU-MIMO mode exceeds a first capacity of the control channel, determining a usage of each of the control channel and the data channel operating in both the MU-MIMO mode and an enhanced control mode, and adjusting a size of the portion of resources of the data channel allocated for control information upon determining that the second usage of one of the control channel or the data channel exceeds a second capacity of one of the control channel or the data channel.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: July 24, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Chunmei Liu, Krishna Sitaram, Hemanth Pawar, Pratik Kothari
  • Patent number: 10028107
    Abstract: Systems and methods for operating a wireless communication system are provided. A network node can determine a number of access nodes transmitting data using a first multimedia broadcast multicast services (MBMS) mode. A number of retransmission requests received at each access node transmitting data using the first MBMS mode can be determined. At least one access node can be reconfigured to transmit data from the first MBMS mode to a second MBMS mode based on the number of retransmission requests received from each access node.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: July 17, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Daniel Vivanco, Krishna Sitaram
  • Patent number: 10028260
    Abstract: A wireless device is configured to function as a relay on behalf of a donor access node. The wireless device requests to send a buffer status report to the donor access node. The donor access node grants this request with an allocation of air-interface resources. The wireless device responds to the grant by sending a short buffer status report. This short buffer status report is associated with a logical channel group that indicates the buffer status report is communicating the status of the wireless device as a relay, and thus is not asking for additional resource allocations. The buffer size field of the short buffer status report may also, or alternatively, be used to indicate the status of the wireless device functioning as a relay, or other information such as the number of other wireless devices being relayed by the wireless device.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: July 17, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth Pawar, Pratik Kothari, Chunmei Liu, Krishna Sitaram
  • Publication number: 20180199252
    Abstract: Systems and methods are described for performing handover of a wireless device to a target Access Node (AN) sector. Beam-form capable sectors of one or more target ANs may be selected from a pool of candidate sectors. At least one of the selected sectors may be prioritized (e.g., over the other sectors) based on an open beam-form seat. Handover of the wireless device from a first AN to the prioritized sector may be performed.
    Type: Application
    Filed: January 29, 2018
    Publication date: July 12, 2018
    Inventors: Hemanth PAWAR, Krishna SITARAM, Pratik KOTHARI
  • Patent number: 10021693
    Abstract: A base station will determine both that a served device's power headroom is threshold low and that the device's downlink receive signal strength is threshold low. In response to at least determining both that the device's power headroom is threshold low and that the device's downlink receive signal strength is threshold low, the base station will then begin applying an uplink coverage boosting process for the device, including limiting or reducing the number of frequency blocks that the base station allocates to the device for uplink transmission per transmission time interval, to help increase the device's per-frequency-block transmission power and thus the device's uplink communication quality. This could be usefully carried out with respect to voice over Long Term Evolution (VoLTE) uplink coverage boosting (VUCB) for instance, to help improve voice communication quality.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: July 10, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth B. Pawar, Shilpa K. Srinivas, Krishna Sitaram
  • Patent number: 10015811
    Abstract: Systems and methods are described for coordinating transmissions from a multiple access nodes in a communication network. A relay-capable status of wireless devices connected to an access node may be determined. Relay capable wireless devices are dynamically selected from the connected wireless devices for assignment of coordinated transmissions from an access node. Scheduling between the selected relay capable wireless devices and the access node is conducted.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: July 3, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth Pawar, Shilpa Kowdley, Krishna Sitaram, Chunmei Liu
  • Patent number: 10009915
    Abstract: Systems and methods are described for cross scheduling transmissions from an access node. Data may be communicated between an access node and a wireless device over a first frequency band. A first application and a second application associated with the wireless device may be determined, where each of the applications comprises an application type. Based on the application type one of the first frequency band and a second frequency band may be selected for the first application and the second application, where the selected frequency bands are different. Transmissions associated with the first application may then be scheduled over the frequency band selected for the first application and transmissions associated with the second application may then be scheduled over the frequency band selected for the second application.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: June 26, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Chunmei Liu, Hemanth Pawar, Krishna Sitaram, Daniel Vivanco
  • Patent number: 9986460
    Abstract: Carrier aggregation may occur in wireless networks when multiple carriers from either contiguous frequency bands or non-contiguous frequency bands are aggregated together as component carriers. Wireless computing devices (WCDs) may use these aggregated component carriers as a single, logical channel for wireless communication. Such a WCD may determine that an amount of carrier aggregation used by a wireless interface of the WCD has increased. The WCD may receive data packets from a correspondent device by way of the wireless interface, and the WCD may transmit, in response to receiving the data packets, acknowledgment packets to the correspondent device by way of the wireless interface. Possibly based on the amount of carrier aggregation increasing, the WCD may reduce an extent of the acknowledgment packets transmitted to the correspondent device.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: May 29, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Chunmei Liu, Pratik Kothari, Hemanth B. Pawar, Krishna Sitaram
  • Patent number: 9948376
    Abstract: Transmission mode selection operations include determining that a first wireless device out of a plurality of wireless devices connected to an access node qualifies for a beamforming transmission mode, determining that a pair of wireless devices out of the plurality of wireless devices qualifies for a multi-user multiple-input multiple-output (MU-MIMO) transmission mode, comparing a first total throughput of the access node using the beamforming transmission mode with a second total throughput of the access node using the MU-MIMO transmission mode, and selecting the downlink transmission mode from the first total throughput and the second total throughput that has a highest total throughput.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: April 17, 2018
    Assignee: Sprint Spectrum LP.
    Inventors: Hemanth Pawar, Chunmei Liu, Krishna Sitaram, Pratik Kothari
  • Patent number: 9942814
    Abstract: Systems and methods are described for performing handover of a wireless device to a target Access Node (AN) sector. Beam-form capable sectors of one or more target ANs may be selected from a pool of candidate sectors. At least one of the selected sectors may be prioritized (e.g., over the other sectors) based on an open beam-form seat. Handover of the wireless device from a first AN to the prioritized sector may be performed.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: April 10, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth Pawar, Krishna Sitaram, Pratik Kothari
  • Publication number: 20180076877
    Abstract: Exemplary embodiments described herein include systems, methods, and nodes for selecting a donor for a relay wireless device. Signal levels corresponding to signals received at a relay wireless device from a plurality of access points are determined. Signal information is received from the plurality of access points, wherein the signal information comprises a group identification for each access point. The signal information for the access points may then be compared to a donor criteria. And the access point corresponding to the greatest signal level that also comprises signal information that meets the donor criteria may be selected as the donor for the relay wireless device.
    Type: Application
    Filed: September 13, 2016
    Publication date: March 15, 2018
    Inventors: Chunmei LIU, Hemanth Pawar, Krishna SITARAM, Pratik Kothari
  • Patent number: 9918282
    Abstract: Systems and methods are described for determining a power option for an access node. Application requirements for a first plurality of wireless devices in communication with a first access node may be identified for each wireless device. The number of wireless devices that comprise a met application requirement may then be determined. When that number meets a first criteria, a plurality of power options for transmitting a first signal may be determined. For each power option, a second number of the first plurality of wireless devices and a third number of wireless devices in communication with a second access node may be estimated. Based on the estimated numbers for the determined power options, a power option may be selected and the first access node may transmit the first signal according to the selected power option.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: March 13, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Daniel Vivanco, Chunmei Liu, Krishna Sitaram
  • Patent number: 9913190
    Abstract: One or more factors are determined for a target cell, the one or more factors being at least one of a morphology, a band class, a loading, and a MIMO type. A modified target cell signal strength threshold for the target cell is set using the one or more factors. The modified target cell signal strength threshold is utilized to initiate a transfer of the wireless device from the serving cell to the target cell.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: March 6, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Krishna Sitaram, Chunmei Liu, Hemanth Pawar, Pratik Kothari
  • Patent number: 9913187
    Abstract: Example methods and an example controller for controlling a bit rate at which a media server streams media content to a UE are provided. The example controller includes at least one processing unit and data storage having instructions executable by the processing unit to carry out operations. The operations include determining an extent to which the UE is configured to tune away from a first RAN to a second RAN to check for pages. Further, the operations include, based on the determined extent, (i) establishing the bit rate and (ii) causing the media server to stream the media content to the UE at the established bit rate.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: March 6, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Hemanth B. Pawar, Shilpa K. Srinivas, Krishna Sitaram, Chunmei Liu