Patents by Inventor Stephen Jay Shellhammer

Stephen Jay Shellhammer 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).

  • Publication number: 20200344007
    Abstract: This disclosure provides systems, methods and apparatuses for data retransmissions in a wireless network. In some implementations, a wireless communication device may transmit a first data unit to a receiving device, may receive a first hybrid automatic repeat request (HARQ) feedback frame indicating that a portion of the first data unit was not successfully decoded by the receiving device, may retransmit the indicated portion of the first data unit to the receiving device in response to the first HARQ feedback frame, and may transmit a second data unit, different than the first data unit, to the receiving device concurrently with the retransmission of the indicated portion of the first data unit.
    Type: Application
    Filed: April 22, 2020
    Publication date: October 29, 2020
    Inventors: Jialing Li Chen, Stephen Jay Shellhammer, Alfred Asterjadhi, Dung Ngoc Doan, Bin Tian, Youhan Kim
  • Publication number: 20200344006
    Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a retransmission protocol in a wireless local area network (WLAN). The retransmission protocol may be based on a hybrid automatic repeat request (HARQ) protocol that supports a delayed acknowledgement for a HARQ retransmission based on receiver processing capability. A first WLAN device may determine that a second WLAN device requires more time to process the HARQ retransmission and may transmit a different communication (interlaced within the HARQ process) to either the second WLAN device or a third WLAN device during the time that the second WLAN device is processing the HARQ retransmission.
    Type: Application
    Filed: April 17, 2020
    Publication date: October 29, 2020
    Inventors: Stephen Jay Shellhammer, Jialing Li Chen, Dung Ngoc Doan, Bin Tian, Youhan Kim, Alfred Asterjadhi
  • Publication number: 20200336982
    Abstract: Methods, systems, and devices for wireless communications are described that enable a keep-alive mode for wakeup radio (WUR) operation. A device may determine whether or not at least one keep-alive frame was received at a WUR during an expected on duration of a duty cycle period associated with the WUR. Another device may generate at least one keep-alive frame. The device may output the at least one keep-alive frame for transmission to a WUR of a second wireless node during an expected on duration of a duty cycle period associated with the WUR of the second wireless node.
    Type: Application
    Filed: April 14, 2020
    Publication date: October 22, 2020
    Inventors: Alfred ASTERJADHI, Stephen Jay SHELLHAMMER, Derrick Chu LIN
  • Patent number: 10813049
    Abstract: A method and an apparatus for wireless communication are provided. In one configuration, an apparatus is configured to transmit a wake-up radio (WUR) signal, to determine to transmit a second signal within a SIFS after transmitting the WUR signal to increase medium reuse, and to transmit the second signal within the SIFS after transmitting the WUR signal based on the determination. The second signal may be a data, management, control, ACK, or CF-end frame to enable legacy devices that do not decode the WUR signal to avoid wasted airtime cause by EIFS after the WUR signal. In another configuration, the apparatus is configured to transmit a CTS-to-self frame, to determine to transmit a second signal within a SIFS after transmitting the CTS-to-self frame, and to transmit the second signal based on the determination. The second signal may be a WUR signal or an intermediate signal followed by a WUR signal.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: October 20, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Yanjun Sun, Alfred Asterjadhi, Bin Tian, George Cherian, Stephen Jay Shellhammer, Lochan Verma
  • Publication number: 20200287759
    Abstract: This disclosure provides methods, devices and systems for identifying wake-up signals. Some implementations more specifically relate to PHY preamble designs for wake-up signals such as Wake-Up Radio (WUR) packets conforming to IEEE 802.11ba. In some implementations, the preamble designs can include a combination of modulation schemes, data rate indications and length indications enabling devices capable of receiving and decoding wake-up signals to identify the signals as wake-up signals (for example, WUR packets), while ensuring that devices not capable of receiving and decoding wake-up signals identify the wake-up signals as legacy packets, or otherwise not WUR packets.
    Type: Application
    Filed: March 2, 2020
    Publication date: September 10, 2020
    Inventors: Didier Johannes Richard VAN NEE, Geert Arnout AWATER, Maarten Menzo WENTINK, Albert VAN ZELST, Bin TIAN, Stephen Jay SHELLHAMMER, Nitin RAVINDER, Muhammed Faruk GENCEL
  • Publication number: 20200083983
    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for low density parity check (LDPC)-based incremental redundancy (IR) hybrid automatic repeat request (HARQ) transmission processing. In one aspect, an apparatus for wireless communications is configured to generate a first packet using a LDPC encoding process. The apparatus is further configured to generate coded bits using a second LDPC encoding process if the first packet is not successfully decoded by a wireless device, generate a second packet including at least some of the coded bits generated using the second LDPC encoding process, and output the second packet for transmission.
    Type: Application
    Filed: September 6, 2019
    Publication date: March 12, 2020
    Inventors: Jialing Li CHEN, Dung Ngoc DOAN, Bin TIAN, Lin YANG, Sameer VERMANI, Lochan VERMA, Stephen Jay Shellhammer
  • Publication number: 20200076551
    Abstract: Methods, systems, and devices for wireless communications are described for coordination between multiple access points (APs) for communications within a transmission opportunity (TxOP). A first AP may gain channel access for a TxOP, and may coordinate with at least a second AP to allow both the first AP and the second AP to transmit and receive wireless communications during the TxOP. The first AP, upon gaining channel access following a successful contention-based channel access procedure, may initiate a scheduling phase with the second AP to schedule of resources within the TxOP for the first and second APs. The first AP may initiate a multi-AP coordinated transmission phase following the scheduling phase, during which both the first AP and second AP may communicate with one or more associated STAs.
    Type: Application
    Filed: September 3, 2019
    Publication date: March 5, 2020
    Inventors: George Cherian, Alfred Asterjadhi, Abhishek Pramod Patil, Sameer Vermani, Bin Tian, Stephen Jay Shellhammer, Lochan Verma, Lin Yang, Jialing Li Chen
  • Publication number: 20200076552
    Abstract: Methods, systems, and devices for wireless communications are described. An access point (AP) may transmit, to a second AP and during a first portion of a transmission opportunity (TxOP), a request to participate in a multi-user (MU) transmission. The AP may receive, from the second AP and during the first portion of the TxOP, an indication of intent to participate in the MU transmission during the second portion of the TxOP, the indication of intent including a resource request of the second AP for participation in the MU transmission. The AP may transmit, during an initial period of the second portion of the TxOP, a trigger signal to the second AP indicating a set of one or more resources for the second AP during the MU transmission. The AP may participate, in conjunction with the second AP and during the second portion of the TxOP, in the MU transmission.
    Type: Application
    Filed: September 3, 2019
    Publication date: March 5, 2020
    Inventors: George Cherian, Alfred Asterjadhi, Abhishek Pramod Patil, Sameer Vermani, Bin Tian, Stephen Jay Shellhammer, Lochan Verma, Lin Yang, Jialing Li Chen
  • Patent number: 10576289
    Abstract: Techniques described herein address these and other issues by providing an architecture of antennas capable of generating a relatively even H-field without exceeding exposure limits, while solving communication issues at the same time. More specifically techniques described herein are directed toward the use of multiple antennas that enable an interrogator device of a biological measurement and stimulation system to power different groups of medical implants at different times by creating fields in different regions of the brain. By doing this, the interrogator device can independently power and/or communicate with groups of medical implants in these different regions and create more evenly-distributed fields while doing so.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: March 3, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Osvaldo Alcala, Stephen Jay Shellhammer, William Henry Von Novak, III
  • Publication number: 20200052832
    Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a hybrid automatic repeat request (HARQ) protocol in a wireless local area network (WLAN). A station (STA) may send a HARQ transmission to another STA. The HARQ protocol may support the use of different types of feedback from the receiving STA to control the HARQ retransmission process. This disclosure provides example message formats to support HARQ transmission and HARQ feedback in a WLAN.
    Type: Application
    Filed: August 8, 2019
    Publication date: February 13, 2020
    Inventors: Bin Tian, Hemanth Sampath, Sameer Vermani, Lin Yang, Dung Ngoc Doan, Simone Merlin, Alfred Asterjadhi, Jialing Li Chen, Stephen Jay Shellhammer
  • Patent number: 10484228
    Abstract: Methods, systems, and devices for wireless communication are described. A transmitting device may transmit a wakeup message to another device. The wakeup message may be transmitted using a transmit diversity scheme in accordance with aspects of the present disclosure. The transmit diversity may, for example, include a cyclic shift diversity scheme, a phase rotation scheme, a symbol generation scheme, or combinations thereof. The transmit diversity may in some cases improve a communication range of the wakeup message or otherwise benefit the wireless communications system.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: November 19, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Stephen Jay Shellhammer, Bin Tian
  • Publication number: 20190342828
    Abstract: Methods, systems, and devices for wireless communications are described. An access point (AP) may identify a sequence of on symbols and off symbols for transmission to a wake-up radio (WUR) of a wireless device. The AP may assign a modulation symbol from a set of possible modulation symbol waveforms to at least each on symbol in the sequence. The modulation symbol waveforms may be assigned to sequential on symbols in a random or pseudorandom order, e.g., by applying a random phase rotation to a stored modulation symbol waveform, by applying a random cyclic shift to a stored modulation symbol waveform, or by applying a random or pseudorandom phase-shift keying value to each subcarrier in a multicarrier system to generate a modulation symbol waveform. The AP may transmit the sequence to the WUR based at least in part on the assigned modulation symbol waveforms.
    Type: Application
    Filed: April 29, 2019
    Publication date: November 7, 2019
    Inventors: Stephen Jay Shellhammer, Didier Johannes Richard Van Nee, Bin Tian
  • Publication number: 20190320493
    Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for efficient support of connected discontinuous reception (C-DRX) by using a wireless device (e.g., a user equipment (UE)) with a second receiver. A wireless device with two receivers may place one receiver in a low power mode and take the receiver out of the low power mode in response to a signal received from a serving base station (BS) of the wireless device. A BS may direct a wireless device to enter a low power DRX (LP-DRX) mode or enhanced DRX mode having longer low power cycles than a non-enhanced DRX mode, and the wireless device may place a primary receiver in a low power mode in response to the directive from the BS. Other aspects, embodiments, and features are also claimed and disclosed.
    Type: Application
    Filed: June 26, 2019
    Publication date: October 17, 2019
    Inventors: Peter Pui Lok ANG, Tingfang JI, Joseph Patrick BURKE, Joseph Binamira SORIAGA, Stephen Jay SHELLHAMMER, Krishna Kiran MUKKAVILLI, John Edward SMEE
  • Publication number: 20190273647
    Abstract: Methods, systems, and devices for wireless communication are described. A transmitting device may transmit a wakeup message to another device. The wakeup message may be transmitted using a transmit diversity scheme in accordance with aspects of the present disclosure. The transmit diversity may, for example, include a cyclic shift diversity scheme, a phase rotation scheme, a symbol generation scheme, or combinations thereof. The transmit diversity may in some cases improve a communication range of the wakeup message or otherwise benefit the wireless communications system.
    Type: Application
    Filed: February 11, 2019
    Publication date: September 5, 2019
    Inventors: Stephen Jay Shellhammer, Bin Tian
  • Publication number: 20190247618
    Abstract: A medical system is provided. The medical system includes a guidewire configured to guide a catheter to a target location within a body, the guidewire including a sensor configured to collect sensor data indicative of a location within the body, and an electrical conductor configured to conduct electrical signals representing the sensor data. The medical system further includes a wireless transmitter and a first antenna electrically coupled with the sensor via the electrical conductor and configured to: receive the electrical signals representing the sensor data; generate, from the electrical signals, first wireless signals representing the sensor data; and transmit, via the first antenna, first wireless signals.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 15, 2019
    Inventors: Stephen Jay SHELLHAMMER, Rashid Ahmed Akbar ATTAR, Adam Edward NEWHAM, William Henry VON NOVAK, Osvaldo ALCALA, Jorge GARCIA, Daniel BUTTERFIELD, Ravindra SHENOY
  • Publication number: 20190253296
    Abstract: Methods and apparatuses are disclosed for communicating over a wireless communication network. One such apparatus may include a memory and a processor configured to identify a transmission mode for a transmission of a signal; select a tone plan for transmission of the signal within a 320 MHz total channel bandwidth or a 240 MHz total channel bandwidth, where the tone plan includes a 256 point tone plan, 512 point tone plan, 1024 point tone plane, 2048 point tone plan, 4096 point tone plan, and where the tone plan is selected based on the transmission mode; generate the signal according to the tone plan; and transmit the signal over the 320 MHz total channel bandwidth or over the 240 MHz total channel bandwidth. The selected tone plan may include one or more duplicates of an IEEE 802.11ax 80 MHz (HE80) tone plan which may include one or more null space 26 tone resource units.
    Type: Application
    Filed: February 12, 2019
    Publication date: August 15, 2019
    Inventors: Jialing Li Chen, Bin Tian, Lin Yang, Sameer Vermani, Lochan Verma, Youhan Kim, Stephen Jay Shellhammer
  • Patent number: 10356839
    Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for efficient support of connected discontinuous reception (C-DRX) by using a wireless device (e.g., a user equipment (UE)) with a second receiver. A wireless device with two receivers may place one receiver in a low power mode and take the receiver out of the low power mode in response to a signal received from a serving base station (BS) of the wireless device. A BS may direct a wireless device to enter a low power DRX (LP-DRX) mode or enhanced DRX mode having longer low power cycles than a non-enhanced DRX mode, and the wireless device may place a primary receiver in a low power mode in response to the directive from the BS. Other aspects, embodiments, and features are also claimed and disclosed.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Peter Pui Lok Ang, Tingfang Ji, Joseph Patrick Burke, Joseph Binamira Soriaga, Stephen Jay Shellhammer, Krishna Kiran Mukkavilli, John Edward Smee
  • Publication number: 20190208470
    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for establishing communications with one or more devices. In one aspect, a first device generates a wake-up radio (WUR) frame, the WUR frame including a media access control (MAC) header and a frame check sequence (FCS) having a cyclic redundancy check (CRC) or a message integrity check (MIC). The first device may determine the FCS based, at least in part, on the MAC header and basic service set identifier (BSSID) information associated with the first device. The first device may output the WUR frame for transmission to one or more devices. A second device may receive the WUR frame from the first device and determine whether the WUR frame is directed to the second device based, at least in part, on comparing the FCS of the WUR frame with a calculated FCS.
    Type: Application
    Filed: January 3, 2019
    Publication date: July 4, 2019
    Inventors: Alfred Asterjadhi, George Cherian, Bin Tian, Stephen Jay Shellhammer
  • Publication number: 20190082385
    Abstract: This disclosure provides systems, methods and apparatuses for indicating a data rate of a packet. The transmitting device may select the data rate of a data field of the packet to be transmitted to the receiving device, and may select a pattern to embed within a preamble of the packet based on the selected data rate. In some implementations, the transmitting device may select a first structure including a first number of instances of a sequence or its logical complement if the selected data rate is a low data rate, and may select a second structure including a second number of instances of the sequence or its logical complement if the selected data rate is a high data rate.
    Type: Application
    Filed: August 23, 2018
    Publication date: March 14, 2019
    Inventors: Stephen Jay Shellhammer, Bin Tian, Lochan Verma
  • Publication number: 20190053725
    Abstract: Techniques described herein provide for the detection and capture of neural signals in a manner that compresses data sent from electrodes to controller by several orders of magnitude over current techniques. In particular, embodiments include detecting a threshold amplitude and/or slope of a detected neural signal, and capturing the detected neural signal once these thresholds are met. A threshold timing detector may be implemented as well. Additionally, these thresholds may be configurable to accommodate various factors, such as electrode placement, sensitivity, etc.
    Type: Application
    Filed: August 15, 2017
    Publication date: February 21, 2019
    Inventors: William Henry Von Novak, Osvaldo Alcala, Stephen Jay Shellhammer, Daniel Butterfield