Patents by Inventor Krishna D. Sitaram

Krishna D. 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: 11146315
    Abstract: A wireless communication network configured to share a wireless resource block that comprises a same time interval and a same radio subcarrier. The wireless communication network comprises network circuitry and transceiver circuitry. The network circuitry determines UE locations and determines UE correlation factors between the UEs based on the UE locations. The network circuitry associates the UE correlation factors with Three-Dimensional (3D) geographic containers based on the first UE locations and generates container correlation factors for the Three-Dimensional (3D) geographic containers responsive to the associations. The network circuitry selects UEs for the shared wireless resource block. The transceiver circuitry wirelessly transfers user data to the selected UEs over the shared wireless resource block that comprises the same time interval and the same radio subcarrier.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: October 12, 2021
    Assignee: Sprint Communications Company L.P.
    Inventors: Krishna D. Sitaram, Hemanth Balaji Pawar, Shilpa Kowdley Srinivas
  • Publication number: 20200403662
    Abstract: A wireless communication network configured to share a wireless resource block that comprises a same time interval and a same radio subcarrier. The wireless communication network comprises network circuitry and transceiver circuitry. The network circuitry determines UE locations and determines UE correlation factors between the UEs based on the UE locations. The network circuitry associates the UE correlation factors with Three-Dimensional (3D) geographic containers based on the first UE locations and generates container correlation factors for the Three-Dimensional (3D) geographic containers responsive to the associations. The network circuitry selects UEs for the shared wireless resource block. The transceiver circuitry wirelessly transfers user data to the selected UEs over the shared wireless resource block that comprises the same time interval and the same radio subcarrier.
    Type: Application
    Filed: July 30, 2020
    Publication date: December 24, 2020
    Inventors: Krishna D. Sitaram, Hemanth Balaji Pawar, Shilpa Kowdley Srinivas
  • Patent number: 10771128
    Abstract: A wireless communication network uses Multi-User Multiple Input Multiple Output (MU-MIMO). Network circuitry stores geographic data that indicates geographic containers. Transceiver circuitry wirelessly receives network signaling from User Equipment (UEs) located in the geographic containers. The network circuitry processes the network signaling to determine UE MU-MIMO correlation factors between the UEs and associate the UE MU-MIMO correlation factors with the geographic containers. The network circuitry processes the UE MU-MIMO correlation factors associated with the geographic containers to determine container MU-MIMO correlation factors between the geographic containers. The network circuitry selects UEs for MU-MIMO based on their container MU-MIMO correlation factors. The transceiver circuitry wirelessly transfers MU-MIMO signals to the UEs that were selected based on their container MU-MIMO correlation factors.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: September 8, 2020
    Assignee: Sprint Communcations Company L.P.
    Inventors: Krishna D. Sitaram, Hemanth Balaji Pawar, Shilpa Kowdley Srinivas
  • Patent number: 10681598
    Abstract: A wireless communication network serve User Equipment (UEs) over Fifth Generation New Radio (5GNR) and Long Term Evolution (LTE). A 5GNR access node receive user data for wireless delivery to the UEs and splits the user data into LTE and 5GNR portions. The 5GNR access node transfers the 5GNR portion to the UEs over 5GNR links and transfers the LTE portion to an LTE access node over X2 links. The LTE access node transfers the LTE portion to the UEs over LTE links. The 5GNR access node identifies X2 link quality. When the X2 link experiences low quality, the 5GNR access node transfers user data to the UEs over 5GNR links without splitting the data to LTE. When the X2 link status has adequate quality, then the 5GNR access node starts splitting user data to LTE again.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: June 9, 2020
    Assignee: Sprint Communications Company L.P.
    Inventors: Krishna D. Sitaram, Shilpa Kowdley Srinivas, Hemanth Balaji Pawar
  • Patent number: 10439787
    Abstract: A Long Term Evolution (LTE) access node to serve User Equipment (UEs) with a wireless Carrier Aggregation (CA) data communication service. A data processing system schedules CA Primary Component Carriers (PCCs), CA intra-band Secondary Component Carriers (SCCs) and CA inter-band SCCs for the UEs. A wireless transceiver wirelessly exchanges user data with the UEs based on the scheduling to serve the UEs with the CA PCCs, the CA intra-band SCCs, and the CA inter-band SCCs. The data processing system detects that a number of the UEs exceeds a UE threshold, and in response, identifies the UEs that use an LTE channel for their CA inter-band SCCs but not for their CA PCCs. The data processing system disables the LTE channel for the UEs that use the LTE channel for their CA inter-band SCCs but not for their CA PCCs.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: October 8, 2019
    Assignee: Sprint Communications Company L.P.
    Inventors: Chunmei Liu, Hemanth Balaji Pawar, Pratik Kothari, Krishna D. Sitaram
  • Patent number: 10212755
    Abstract: A wireless access point controls Discontinuous Reception (DRX) parameters for User Equipment (UE). The wireless access point wirelessly exchanges wireless communications with a plurality of UEs comprising High Power UEs (HPUEs) and non-HPUEs. The wireless access point determines a number of the HPUEs and determines a number non-HPUEs experiencing RF interference above an RF interference threshold. The wireless access point compares the number of non-HPUEs experiencing RF interference above the RF interference threshold to the number of HPUEs and when the number of non-HPUEs experiencing RF interference above the RF interference threshold exceeds the number of HPUEs, then the wireless access point modifies the DRX parameters for the HPUEs to a low DRX parameter setting. The wireless access point wirelessly transmits an instruction to the HPUEs indicating the modification of the DRX parameters for the HPUEs to the low DRX parameter setting.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: February 19, 2019
    Assignee: Sprint Communications Company L.P.
    Inventors: Hemanth Balaji Pawar, Krishna D. Sitaram, Shilpa Kowdley Srinivas
  • Patent number: 10091784
    Abstract: An Orthogonal Frequency Division Multiplexing (OFDM) communication network controls Device-to-Device (D2D) scheduling. The OFDM access point wirelessly exchanges wireless communications with a plurality of individual User Equipment (UEs) using scheduled UE resources in a shared resource range. The OFDM access point wirelessly receives a first D2D communication request for a first D2D UE and responsively schedules D2D resources for the first D2D communication request in the shared resource range. The OFDM access point detects D2D interference for one of the plurality of individual UEs and determines that the D2D interference exceeds a D2D interference threshold. The OFDM access point wirelessly receives a second D2D communication request for a second D2D UE and responsively schedules D2D resources for the second D2D communication request in a D2D dedicated resource sub-range.
    Type: Grant
    Filed: December 31, 2016
    Date of Patent: October 2, 2018
    Assignee: Sprint Communications Company L.P.
    Inventors: Chunmei Liu, Krishna D. Sitaram, Hemanth Balaji Pawar, Pratik Kothari
  • Patent number: 9986513
    Abstract: A wireless access point dynamically controls Device-to-Device (D2D) transmission power. The wireless access point exchanges wireless communications with a plurality of User Equipment (UEs) comprising Device-to-Base Station (D2BS) UEs and D2D UEs, determines geographical locations for each of the D2BS UEs and the D2D UEs, and processes the geographical locations for each of the D2BS UEs and the D2D UEs with a neighbor distance threshold to identify which of the D2BS UEs neighbors the D2D UEs and which of the D2BS UEs do not neighbor the D2D UEs. The wireless access point monitors a Radio Frequency (RF) interference for the neighbor D2BS UEs and the non-neighbor D2BS UEs, determines that a difference between the RF interference of the neighbor UEs and the non-neighbor D2BS UEs is above an RF interference threshold, and transmits an instruction to the D2D UEs neighboring the neighbor D2BS UEs to decrease a transmission power amount.
    Type: Grant
    Filed: December 31, 2016
    Date of Patent: May 29, 2018
    Assignee: Sprint Communications Company L.P.
    Inventors: Chunmei Liu, Pratik Kothari, Krishna D. Sitaram, Hemanth Balaji Pawar
  • Publication number: 20180084552
    Abstract: A Long Term Evolution (LTE) access node to serve User Equipment (UEs) with a wireless Carrier Aggregation (CA) data communication service. A data processing system schedules CA Primary Component Carriers (PCCs), CA intra-band Secondary Component Carriers (SCCs) and CA inter-band SCCs for the UEs. A wireless transceiver wirelessly exchanges user data with the UEs based on the scheduling to serve the UEs with the CA PCCs, the CA intra-band SCCs, and the CA inter-band SCCs. The data processing system detects that a number of the UEs exceeds a UE threshold, and in response, identifies the UEs that use an LTE channel for their CA inter-band SCCs but not for their CA PCCs. The data processing system disables the LTE channel for the UEs that use the LTE channel for their CA inter-band SCCs but not for their CA PCCs.
    Type: Application
    Filed: November 27, 2017
    Publication date: March 22, 2018
    Inventors: Chunmei Liu, Hemanth Balaji Pawar, Pratik Kothari, Krishna D. Sitaram
  • Patent number: 9860898
    Abstract: A Long Term Evolution (LTE) network wirelessly exchanges data over an LTE channel with a plurality of User Equipment (UE) by using Carrier Aggregation with at least some of the UEs. The LTE network compares a number of the UEs using the LTE channel to an admission threshold, and if the number of UEs exceeds the admission threshold, then identifying individual ones of the UEs that are using the LTE channel for a Carrier Aggregation Secondary Component Carrier but not for a Carrier Aggregation Primary Component Carrier. The LTE network disables the LTE channel for the individual ones of the UEs that are using the LTE channel for their Secondary Component Carrier but not for their Primary Component Carrier.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: January 2, 2018
    Assignee: Sprint Communications Company L.P.
    Inventors: Chunmei Liu, Hemanth Balaji Pawar, Pratik Kothari, Krishna D. Sitaram
  • Publication number: 20160330731
    Abstract: Examples disclosed herein provide systems, methods, and software to dynamically provide multi-user multiple-input and multiple-output format to wireless communication devices. In one example, a method includes receiving uplink communication signals from wireless communication devices using single user MIMO format. The method further provides identifying uplink data requirements for the wireless communication devices, and determining whether the uplink data requirements meet uplink criteria. The method also includes, if the data requirements meet the uplink criteria, initiating a transition from the single user MIMO format to the multi-user MIMO format.
    Type: Application
    Filed: May 4, 2015
    Publication date: November 10, 2016
    Inventors: Chunmei Liu, Krishna D. Sitaram, Hemanth Balaji Pawar, Pratik Kothari
  • Patent number: 9439238
    Abstract: A method and system for setting a hold-timer duration is disclosed. The method involves a first network initially serving a UE by providing the UE with data service, wherein serving the UE includes allocating at least one resource to the UE and using the at least one resource to serve the UE. The method further involves, setting a hold-timer duration for a hold-timer for release of the at least one resource that the first network allocated to the UE, wherein setting the hold-timer duration comprises (i) making at least one determination selected from the group consisting of (a) a determination of a network load of the first network, (b) a determination of a data-service type of the data service, and (c) a determination of an estimated call duration for the UE and (ii) using the at least one determination as a basis to set the hold-timer duration.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: September 6, 2016
    Assignee: Sprint Spectrum L.P.
    Inventors: Krishna D. Sitaram, Daniel Vivanco, Chunmei Liu
  • Patent number: 9392533
    Abstract: Methods and systems for determining how much time a user equipment (UE) device should spend scanning for base station signals and how often the UE device should provide reports to a position determining equipment (PDE) device regarding the scanned base station signals so as to determine an accurate position of the UE device, especially while the UE device is in motion or within areas of low base station density, are described. Selecting the rate to scan base station signals for a given frequency band can be based, at least in part, on the availability of the given frequency band in proximity to the UE device and to a throughput value associated with an application executing on the UE device. Selecting the rate to provide scanning reports can be based, at least in part, on a speed of the UE device and a network topology, such as base station density.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: July 12, 2016
    Assignee: Sprint Spectrum L.P.
    Inventors: Daniel Vivanco, Krishna D. Sitaram, Chunmei Liu
  • Patent number: 9258754
    Abstract: Systems and methods of operating multimode 3G/4G communications devices in an overlapping 3G/4G coverage area (e.g., WiMAX or LTE/CDMA EvDO) include determining if a number associated with temporarily-disabled sectors of an available sector set of the multimode device while the device is operational with a 3G base station is at least equal to a threshold number. If the number is at least equal to the threshold number, a scan for a sector in the 4G network to handover the operation of the multimode device from the 3G base station associated with the 3G coverage to a 4G base station associated with the 4G coverage is initiated. A scan for a fixed period of time for a new available sector in the 3G network to be added in the available sector set may be initiated; and, if a new available sector is added to the sector set, it may be redetermined if the number associated with the temporarily-disabled sectors is at least equal to the threshold number, before initiating the scan for a sector in the 4G network.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: February 9, 2016
    Assignee: Clearwire IP Holdings LLC
    Inventors: Hemanth Balaji Pawar, Krishna D. Sitaram, Daniel Vivanco
  • Patent number: 9155034
    Abstract: A Wireless Communication Device (WCD) and method for hand-up from a less-capable communication protocol of a wireless access node to a more-capable communication protocol of the wireless access node are provided. The WCD in one example embodiment includes a communication transceiver configured to exchange wireless communications and receive a control signal from the wireless access node, with the control signal including a hand-up field, and a processing system coupled to the communication transceiver and configured to process the hand-up field to determine if the WCD can hand-up from the less-capable communication protocol to the more-capable communication protocol, set a hand-up state according to the hand-up field, and scan for the availability of the more-capable communication protocol if the more-capable communication protocol is indicated by the hand-up state.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: October 6, 2015
    Assignee: Sprint Communications Company L.P.
    Inventors: Wen Xue, Krishna D. Sitaram, Rajat Kumar, Jay Douglas Cole
  • Patent number: 8738063
    Abstract: A wireless device associated with a first profile is communicated with using a first multi-antenna mode. Communication is received from a plurality of wireless devices associated with a second profile. The plurality of wireless devices are determined to be located within a defined area of the wireless device. Based on the determination that the plurality of wireless devices are located within the defined area of the wireless device, at least one of the plurality of wireless devices is sent at least one control message that instructs the at least one of the plurality of wireless devices to transmit a future communication at a lower power level.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: May 27, 2014
    Assignee: Sprint Communications Company L.P.
    Inventors: Hemanth Balaji Pawar, Swati Tiwari, Krishna D. Sitaram, Jong-hak Jung, Esmail Hejazi Dinan
  • Publication number: 20140024373
    Abstract: Systems and methods of operating multimode 3G/4G communications devices in an overlapping 3G/4G coverage area (e.g., WiMAX or LTE/CDMA EvDO) include determining if a number associated with temporarily-disabled sectors of an available sector set of the multimode device while the device is operational with a 3G base station is at least equal to a threshold number. If the number is at least equal to the threshold number, a scan for a sector in the 4G network to handover the operation of the multimode device from the 3G base station associated with the 3G coverage to a 4G base station associated with the 4G coverage is initiated. A scan for a fixed period of time for a new available sector in the 3G network to be added in the available sector set may be initiated; and, if a new available sector is added to the sector set, it may be redetermined if the number associated with the temporarily-disabled sectors is at least equal to the threshold number, before initiating the scan for a sector in the 4G network.
    Type: Application
    Filed: March 11, 2013
    Publication date: January 23, 2014
    Applicant: Clearwire IP Holdings LLC
    Inventors: Hemanth Balaji PAWAR, Krishna D. Sitaram, Daniel Vivanco
  • Patent number: 8571558
    Abstract: A mobile communication device wirelessly transfers user communications to a first wireless base station. The mobile communication device determines a first metric based on a load indicator for the first base station. The mobile communication device identifies a second wireless base station and determines a second metric based on a load indicator for the second base station. If the second metric is superior to the first metric, the mobile communication device determines if the second base station has sufficient performance characteristics for communication with the device. If the performance is sufficient, the mobile communication device initiates a hand-off from the first base station to the second base station. The mobile communication device may use additional factors to determine the first and second metrics.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: October 29, 2013
    Assignee: Clearwire IP Holdings LLC
    Inventors: Esmail Hejazi Dinan, Jong-hak Jung, Swati Tiwari, Hemanth Balaji Pawar, Krishna D. Sitaram
  • Patent number: 8542653
    Abstract: A mobile communication device wirelessly transfers user communications to a first wireless base station. The mobile communication device identifies a second wireless base station that has sufficient performance characteristics for wireless communication with the mobile communication device and that has a higher communication priority than the first wireless base station. In response, the mobile communication device initiates a hand-off from the first wireless base station to the second wireless base station. In response to the hand-off, the mobile communication device stops the wireless transfer of the user communications to the first wireless base station and wirelessly transfers additional user communications to the second wireless base station.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: September 24, 2013
    Assignee: Clearwire IP Holdings LLC
    Inventors: Esmail Hejazi Dinan, Jong-hak Jung, Swati Tiwari, Hemanth Balaji Pawar, Krishna D. Sitaram
  • Patent number: 8423068
    Abstract: A method of operating a communication system is disclosed. A first wireless device associated with a first profile is communicated with using a first multi-antenna mode. A second wireless device associated with a second profile is communicated with using the first multi-antenna mode. A network resource utilization is determined. It is determined that the network resource utilization satisfies a criteria. Based on the network resource utilization satisfying the criteria, at least one control message is sent that instructs the second wireless device to use a second multi-antenna mode.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: April 16, 2013
    Assignee: Clearwire IP Holdings LLC
    Inventors: Swati Tiwari, Krishna D. Sitaram, Hemanth Balaji Pawar, Jong-hak Jung, Esmail Hejazi Dinan