Patents by Inventor Rajesh Pazhyannur

Rajesh Pazhyannur 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: 10846192
    Abstract: A request is received from a client device to connect to a wireless network associated with a cloud computing device. A first notification is received to indicate that a first client transaction has started. Using a first timer, a first timestamp associated with a start time of the first client transaction is identified. A first data frame having the first client transaction and the first timestamp is generated. A second notification indicating that the first client transaction has completed is received. Using the first timer, a second timestamp associated with an end time of the first client transaction is identified. Using the second timestamp, the first data frame is updated using the second timestamp. The first data frame is sent to the cloud computing device.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: November 24, 2020
    Assignee: Cisco Technology, Inc.
    Inventors: Kedar K. Gaonkar, Rajesh Pazhyannur, Aruna Nukala
  • Publication number: 20200133815
    Abstract: A request is received from a client device to connect to a wireless network associated with a cloud computing device. A first notification is received to indicate that a first client transaction has started. Using a first timer, a first timestamp associated with a start time of the first client transaction is identified. A first data frame having the first client transaction and the first timestamp is generated. A second notification indicating that the first client transaction has completed is received. Using the first timer, a second timestamp associated with an end time of the first client transaction is identified. Using the second timestamp, the first data frame is updated using the second timestamp. The first data frame is sent to the cloud computing device.
    Type: Application
    Filed: October 31, 2018
    Publication date: April 30, 2020
    Inventors: Kedar K. Gaonkar, Rajesh Pazhyannur, Aruna Nukala
  • Patent number: 10375582
    Abstract: A mobile device transmits data over a shared spectrum in an uplink channel to a base station in a contention-based access scheme. The mobile device obtains data to be wirelessly transmitted over the shared spectrum in the uplink channel to the base station. The uplink channel is formatted with a frame/subframe structure with a predetermined timing. The mobile device determines whether the shared spectrum is free for transmission according to a listen before transmit procedure. When the shared spectrum is free for transmission, the mobile device contends with other mobile device to gain access to the uplink channel. After gaining access to the uplink channel, the mobile device transmits the data over the shared spectrum in the uplink channel to the base station.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: August 6, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Vikram Chandrasekhar, Kedar Shirali, Qing Zhao, Rajesh Pazhyannur
  • Patent number: 10356627
    Abstract: An access point (AP) transmits Wi-Fi transmit frames according to a Wi-Fi protocol and Long-Term Evolution-Unlicensed (LTE-U) transmit frames according to an LTE-U protocol in a shared channel bandwidth that encompasses unlicensed channel bandwidth associated with the LTE-U protocol. The AP assigns a Wi-Fi access category to each Wi-Fi transmit frame and assigns to each LTE-U transmit frame an LTE-U access category. The AP schedules Wi-Fi and LTE-U transmit opportunities for the Wi-Fi transmit frames and the LTE-U transmit frames, respectively, in the shared channel bandwidth based on the Wi-Fi and LTE-U access categories. The scheduling includes, for each scheduled LTE-U transmit opportunity: constructing a Wi-Fi quiet message commanding Wi-Fi clients of the AP not to transmit in the shared channel bandwidth during the LTE-U transmit opportunity; and scheduling the Wi-Fi quiet message for transmission to the Wi-Fi clients.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: July 16, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Ahmadreza Hedayat, Rajesh Pazhyannur
  • Patent number: 10219178
    Abstract: Data to be transmitted to a user device may be received at a network device. It may be determined that the user device has network connectivity to the network device via a wide area wireless network connection and that the user device also separately has connectivity to the network device via a local area wireless network connection to an access point. The data may be split so that some portion of the data is to be transmitted by the wide area wireless network connection and another portion of the data is to be transmitted by the local area wireless network connection.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: February 26, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Rajesh Pazhyannur, Vivek Jha
  • Patent number: 10142951
    Abstract: An LAA-LTE wireless device obtains data to be transmitted in subframes over a shared spectrum. The wireless device transmits a reservation message over the shared spectrum. The reservation message indicates that an initial synchronization message will be retransmitted a specified number of times at specified intervals, such as with a predetermined number of subframes between each retransmitted synchronization message. The wireless device transmits the initial synchronization message over the shared spectrum.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: November 27, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Raymond Yuk Chor Kwan, Peter Keevill, James Paul Seymour, Rajesh Pazhyannur, Patrick Georges Venceslas Charriere
  • Patent number: 10104689
    Abstract: A first wireless device determines the duration of a clear channel assessment interval based on feedback signals before transmitting data to a second wireless device. The first wireless device receives feedback signals, such as acknowledgement (ACK) and negative acknowledgement (NAK) signals, from one or more second wireless devices. The first wireless device determines a ratio of NAK/ACK signals in the feedback signals for a predetermined amount of time. The first wireless device determines whether the wireless medium is free by monitoring for wireless signals during a clear channel assessment interval. The duration of the clear channel assessment interval is based on the ratio of NAK/ACK signals. If the wireless medium is free for the duration of the clear channel assessment, the first wireless device wirelessly transmits data to at least one of the second wireless devices.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: October 16, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Rajesh Pazhyannur, Vikram Chandrasekhar, Raymond Yuk Chor Kwan
  • Publication number: 20180288625
    Abstract: A mobile device transmits data over a shared spectrum in an uplink channel to a base station in a contention-based access scheme. The mobile device obtains data to be wirelessly transmitted over the shared spectrum in the uplink channel to the base station. The uplink channel is formatted with a frame/subframe structure with a predetermined timing. The mobile device determines whether the shared spectrum is free for transmission according to a listen before transmit procedure. When the shared spectrum is free for transmission, the mobile device contends with other mobile device to gain access to the uplink channel. After gaining access to the uplink channel, the mobile device transmits the data over the shared spectrum in the uplink channel to the base station.
    Type: Application
    Filed: May 29, 2018
    Publication date: October 4, 2018
    Inventors: Vikram Chandrasekhar, Kedar Shirali, Qing Zhao, Rajesh Pazhyannur
  • Patent number: 10028151
    Abstract: A mobile device obtains data to be wirelessly transmitted over a shared spectrum in an uplink channel to a base station. The uplink channel is formatted with a frame/subframe structure with a predetermined timing. The mobile device determines whether the shared spectrum is free for transmission according to a Listen Before Transmit procedure. When the shared spectrum is free for transmission, the mobile device selects a start time in the uplink channel that mitigates interference from other mobile devices in proximity to the mobile device. Beginning at the start time, the mobile device transmits the data over the shared spectrum in the uplink channel to the base station.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: July 17, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Vikram Chandrasekhar, Kedar Shirali, Qing Zhao, Rajesh Pazhyannur
  • Patent number: 10014991
    Abstract: Modifications to frame/subframe structure are presented herein so that a wireless device can transmit its data within a fraction of a subframe. The device obtains data to be transmitted in an unlicensed spectrum and determines whether an entire subframe is required to completely communicate the data. If the data is small enough to not require the entire subframe, then the device generates a burst transmission to minimize the time period of the subframe used to communicate the data. The device transmits the burst transmission and a parameter indicating the duration of the burst transmission.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: July 3, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Vikram Chandrasekhar, James Seymour, Rajesh Pazhyannur, Andrew Myles
  • Publication number: 20180176791
    Abstract: An access point (AP) transmits Wi-Fi transmit frames according to a Wi-Fi protocol and Long-Term Evolution-Unlicensed (LTE-U) transmit frames according to an LTE-U protocol in a shared channel bandwidth that encompasses unlicensed channel bandwidth associated with the LTE-U protocol. The AP assigns a Wi-Fi access category to each Wi-Fi transmit frame and assigns to each LTE-U transmit frame an LTE-U access category. The AP schedules Wi-Fi and LTE-U transmit opportunities for the Wi-Fi transmit frames and the LTE-U transmit frames, respectively, in the shared channel bandwidth based on the Wi-Fi and LTE-U access categories. The scheduling includes, for each scheduled LTE-U transmit opportunity: constructing a Wi-Fi quiet message commanding Wi-Fi clients of the AP not to transmit in the shared channel bandwidth during the LTE-U transmit opportunity; and scheduling the Wi-Fi quiet message for transmission to the Wi-Fi clients.
    Type: Application
    Filed: February 15, 2018
    Publication date: June 21, 2018
    Inventors: Ahmadreza Hedayat, Rajesh Pazhyannur
  • Patent number: 9967771
    Abstract: Presented herein are mechanisms to reduce collisions in deployments with Wi-Fi and Shared Access LTE (SAC-LTE) equipment as well SAC-LTE equipment from multiple operators. The mechanisms enhance the baseline energy detection mechanism by incorporating methods to decode cross-technology physical layer elements and media access control (MAC) layer elements in the Wi-Fi system to elements in the SAC-LTE system. The methods described improve the detection potential for transmitters, thereby reducing chances of cross-technology collisions.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: May 8, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Rajesh Pazhyannur, Brian Hart, Andrew Myles, Vikram Chandrasekhar
  • Patent number: 9942901
    Abstract: A method is provided for minimizing cross-technology interference with data transmissions from a wireless device in a shared spectrum. The wireless device obtains data to be wirelessly transmitted in a transmission burst in a first radio access technology (RAT) format over a shared spectrum. The wireless device generates a preamble comprising assistance information related to the transmission burst. The preamble comprises a first preamble portion in the first RAT format and a second preamble portion in a second RAT format. The wireless device transmits the preamble followed by the transmission burst.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: April 10, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Vikram Chandrasekhar, James Seymour, Rajesh Pazhyannur, Andrew Myles
  • Patent number: 9930535
    Abstract: A wireless access point (AP) configured to operate in accordance with both Wi-Fi and Long-Term Evolution (LTE-U) standards/protocols jointly schedules transmit opportunities for Wi-Fi and LTE-U frames. The AP assigns one of multiple, prioritized, Wi-Fi access categories to each Wi-Fi transmit frame based on a type of data in the transmit frame. The AP also assigns to each LTE-U transmit frame an LTE-U access category prioritized relative to the Wi-Fi access categories. The AP schedules Wi-Fi and LTE-U transmit opportunities for the Wi-Fi transmit frames and the LTE-U transmit frames, respectively, in the shared channel bandwidth based on the prioritized Wi-Fi and LTE-U access categories.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: March 27, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Ahmadreza Hedayat, Rajesh Pazhyannur
  • Patent number: 9894535
    Abstract: A wireless device accesses a shared spectrum equitably in a self-organizing manner by determining success indices and adjusting courtesy parameters. The wireless device transmits wireless transmissions in a frame subframe structure over a shared spectrum, each of the subframes bounded by subframe boundaries at predetermined time intervals. The success index represents a measure of success in transmitting wireless transmissions in the shared spectrum. The wireless device performs a clear channel assessment to determine whether the shared spectrum is available at the end of the clear channel assessment time interval. The wireless device determines a gap interval between the end of the clear channel assessment time interval and the next subframe boundary and transmits the success index during the gap interval.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: February 13, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Raymond Yuk Chor Kwan, Peter Keevill, James Paul Seymour, Rajesh Pazhyannur
  • Patent number: 9832808
    Abstract: A first network device may operate as a base station in a wireless wide area network (WWAN) and may establish a WWAN connection with a user device. A media access control (MAC) address of the user device may be obtained and sent to a second network device which operates an access point for a wireless local area network (WLAN). An acknowledgement containing a first service set identifier of the WLAN may be received from the second network device and sent to the user device to set up a secondary connection. An identifier for ordered data communication may used to enable in order communication through both the first and the second network devices. Data to be transmitted to the user device may be split into a first portion and a second portion, and transmitted through the WWAN connection and to the second network device for transmission to the user device via the WLAN respectively.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: November 28, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Rajesh Pazhyannur, Vivek Jha
  • Publication number: 20170325184
    Abstract: An LAA-LTE wireless device obtains data to be transmitted in subframes over a shared spectrum. The wireless device transmits a reservation message over the shared spectrum. The reservation message indicates that an initial synchronization message will be retransmitted a specified number of times at specified intervals, such as with a predetermined number of subframes between each retransmitted synchronization message. The wireless device transmits the initial synchronization message over the shared spectrum.
    Type: Application
    Filed: May 5, 2016
    Publication date: November 9, 2017
    Inventors: Raymond Yuk Chor Kwan, Peter Keevill, James Paul Seymour, Rajesh Pazhyannur, Patrick Georges Venceslas Charriere
  • Publication number: 20170325098
    Abstract: A wireless device accesses a shared spectrum equitably in a self-organizing manner by determining success indices and adjusting courtesy parameters. The wireless device transmits wireless transmissions in a frame subframe structure over a shared spectrum, each of the subframes bounded by subframe boundaries at predetermined time intervals. The success index represents a measure of success in transmitting wireless transmissions in the shared spectrum. The wireless device performs a clear channel assessment to determine whether the shared spectrum is available at the end of the clear channel assessment time interval. The wireless device determines a gap interval between the end of the clear channel assessment time interval and the next subframe boundary and transmits the success index during the gap interval.
    Type: Application
    Filed: May 5, 2016
    Publication date: November 9, 2017
    Inventors: Raymond Yuk Chor Kwan, Peter Keevill, James Paul Seymour, Rajesh Pazhyannur
  • Patent number: 9807821
    Abstract: Systems and methods for providing host-neutral small cells include communicating with a first User Equipment (UE) at a small cell. The first UE communicates with the small cell via a first Evolved Node B (eNodeB) base station associated with a first Evolved Packet Core (EPC). The small cell further communicates with a second UE. The second UE communicates with the small cell via a second eNodeB base station associated with a second EPC. Although a different wireless carrier may be associated with each of the first and second UEs, they may both communicate with the host-neutral small cell.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: October 31, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Vivek Jha, Rajesh Pazhyannur, Maulik Vaidya
  • Patent number: 9686688
    Abstract: A Long-Term Evolution-Unlicensed (LTE-U) access point (AP) is configured to operate wirelessly on any of multiple RF channels in an unlicensed frequency band. The AP detects other LTE-U APs and Wi-Fi APs operating on active ones of the multiple channels. The AP determines AP channel statistics for each detected AP. The AP determines, for each active channel, a per-channel metric based on the AP channel statistics. The AP ranks the active channels according to the corresponding per-channel metrics, and selects a best channel on which to transmit in the unlicensed frequency band from among the ranked active channels based on the rankings.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: June 20, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Ahmadreza Hedayat, Rajesh Pazhyannur