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.

Abstract: A method of operation of an electronic device includes receiving a preamble portion of a packet from an access point using a wakeup receiver of the electronic device and receiving a data portion of the packet from the access point using the wakeup receiver. The preamble portion includes a preamble bit having a preamble bit duration, and the data portion includes a data bit having a data bit duration that is longer than the preamble bit duration.

Abstract: Methods, systems, and devices for data rate adaptation to extend the range of wake-up radio transmissions sent to a wake-up radio of a station (STA). Data rate adaptation procedures may be used to select a data rate for wake-up radio transmission based on one or more identified parameters. An access point may execute one or more different types of rate adaptation procedures to select the appropriate data rate. In some examples, the access point may select a data rate of wake-up radio transmissions based on one or more messages failing to be successfully decoded. In some examples, the access point may select a data rate of wake-up radio transmissions based on a distance between the access point and the station. In some examples, the access point may select a data rate of wake-up radio transmission based on information identified during a training procedure.

Abstract: Techniques provided herein are directed toward providing a robust downlink communication frame that enables medical implants with highly inaccurate LOs to reliably provide uplink communications to an interrogator device. The downlink communication frame can include, among other things, a plurality of uplink trigger subframes that enable timing of uplink communication of the various medical implants with which the interrogator device is communicating. These uplink trigger subframes may be modulated in a special manner as to distinguish them from other subframes.

Abstract: A leader-follower protocol is provided for wireless communication in a BAN. A connection is established between a leader of the BAN and at least one follower in the BAN. The follower refrains from transmitting until a transmission is received from the leader. The transmission from the leader triggers a transmission opportunity at the follower for a window of time. Once the follower receives a transmission from the leader, the follower may then transmit a second transmission to the leader within the window of time. The transmission from the leader that triggers the transmission opportunity for the follower may be a data transmission, a poll transmission, an ACK a sleep mode message, etc. After transmitting a transmission to the a follower, the leader refrains from transmitting for the window of time in order to accommodate the transmission opportunity for the at least one follower.

Abstract: Systems and methods are disclosed for enhancing the power efficiency of low power internet of everything (IOE) devices or user equipments (UEs). A UE or IOE having a low power companion receiver maintains its full power receiver in a sleep state until it receives a wake up indicator from a base station. In response to the wake up signal, the UE or IOE powers up its full power receiver and receives data from the base station. The base station further schedules the wake up signals so as not to collide with control signals expected by UEs or IOEs without low power receivers, or those UEs and IOEs are configured to detect and react to the wake up signals.

Abstract: An access point (AP) may determine a time resolution for values indicative of wakeup signal transmission times based on a wakeup schedule of a station (STA) and a clock drift value for the STA and may transmit, to a primary radio of the STA, an indication of the time resolution. The AP may identify a transmission time of a wakeup signal for the STA and determine a value indicative of the transmission time. The AP may transmit, to a wakeup radio of the STA, the wakeup signal as a packet that includes the value indicative of the transmission time. The STA may determine the transmission time of the wakeup signal based on the wakeup schedule, the indication of the time resolution, and the value indicative of the transmission time and may update a local clock timing based on the transmission time.

Abstract: Techniques provided herein are directed toward providing a robust pulse width modulated (PWM) amplitude modulation scheme that enables medical implants with highly inaccurate LOs to reliably receive downlink communications from an interrogator device by using pulse width to encode data. Synchronization and data fields can comprise pulse pairs, distinguishable by medical implants from a ratio of the duration of a long pulse to the duration of a short pulse within the pulse pair.

Abstract: A communication packet (PHY packet) can include a plurality of subfields with a common symbol sequence that can be used for autocorrelation. The symbol sequence of each subfield may be multiplied by a constant of either +1 or ?1, based on a different bit of a maximal length sequence, which can enable cross-correlation. Thus, this packet design enables packet detection, symbol timing recovery, and carrier frequency offset estimation.

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to ultra low-power paging frames for wake up and discovery. One example apparatus for wireless communications generally includes at least one interface configured to receive via a first radio and a second radio, wherein the at least one interface receives a paging frame from another apparatus via the second radio while the first radio is in a first power state that is lower than a second power state of the second radio; and a processing system configured to take one or more actions based on a command field included in the paging frame.

Abstract: Techniques and apparatus for wake-up radio (WUR) operations are provided. One technique includes communicating with one or more wireless devices via a first radio operating on a first channel. A WUR is operated on a second channel different from the first channel. A wireless device may receive an indication of the second channel to use for monitoring for WUR transmission, and monitor for a WUR transmission on the second channel after receiving the indication.

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.

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.

Abstract: Methods, systems, and devices for wireless communication are described that provide for generating a multicarrier wakeup signal that is modulated using multiple on-off keying (OOK) patterns. In some cases, the OOK pattern may be constructed using one or more of the following techniques: forward error correction (FEC) coding, spreading, encoding (e.g., DC balance encoding such as Manchester encoding), and orthogonal frequency division multiplexing (OFDM) overlay mapping. The resulting signal may serve to increase the sensitivity of the receiver. The OOK patterns may include on portions and off portions that are indicative of different bit values, such as a one bit or a zero bit. The multicarrier wakeup signal may be decoded by a first radio of a wireless device that compares the energy of the signal over different time periods to determine the bit value. Once determined, the wireless device may choose to activate a second radio for communication.

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for wirelessly charging a device having a wireless power receiver with a dead battery. One example method for safely wirelessly charging an implantable device, with an apparatus, generally includes determining that the implantable device has a dead battery; based on the determination, wirelessly transmitting power from the apparatus at an initial level for a first interval; checking for a first signal received from the implantable device during or at an end of the first interval or a period associated with the initial level; and if no first signal is received from the implantable device, increasing the transmitted power to a higher level for a second interval.

Abstract: Methods, systems, and devices for wireless communication are described. An access point (AP) may identify a jitter pattern for a wakeup message. A station may listen using a wakeup radio for a wakeup message during wakeup listening periods according to the identified jitter pattern. A station may receive a preamble having a first bandwidth and a wakeup message having a second bandwidth. An AP may transmit an identifier key to a station, and the station may determine a rotating identifier associated with the AP based on the received identifier key. The station may receive a wakeup message from the AP, compare a sender identifier with the rotating identifier, and power on a second radio. A station may also receive a wakeup message that includes an indication of which station are to be activated.

Abstract: Techniques are described in this disclosure of a physical layer design for wakeup messages having multiple types of wakeup messages. Such designs may include a standard wakeup message having a first bit duration and a low-sensitivity wakeup message having a second bit duration. During operation, the access point (AP) may select which type of wakeup message to use when communicating with a wireless device or a group of wireless devices. Wakeup intervals during a low-power mode of the wireless device may be adjusted based at least in part on which type of wakeup message is being used. Parameter values for the wakeup messages may be determined based at least in part on proximity of the wireless device relative to the AP.

Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for an access point (AP) that may identify a pending communication for a wireless device and transmit a wakeup message comprising a device specific identifier to a wakeup radio of the wireless device. The wakeup message may include a preamble, a signal field, and a data field. In some cases, the wireless device may demodulate the wakeup message using a phase modulated on-off keying (PM-OOK) modulation. After awakening, the wireless device and the AP may exchange data using the primary radio, which may be a wireless local area network (WLAN) transceiver or a wireless wide area network (WWAN) transceiver. The wireless device may receive the wakeup message using the wakeup radio, decode the message to obtain a device specific identifier, and activate a primary radio to communicate with the AP.

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to ultra low power paging frames for wake up and discovery. One example apparatus for wireless communications generally includes at least one interface configured to obtain a frame via a first radio and a second radio, wherein the interface receives a frame from another apparatus via the second radio while the first radio is in a first power state; and a processing system configured to take one or more actions based on a command field included in the frame.

Abstract: A station configured to operate in a wireless network includes low-power protocol circuitry configured to operate according to a low-power protocol coupled to primary protocol circuitry configured to operate according to a first protocol. The low-power protocol circuitry includes a wake-up receiver configured to transition into a receive mode according to a medium access schedule. The wake-up receiver is also configured to receive synchronization signals from a wake-up transmitter of an access point in the wireless network. Each synchronization signal is received according to a slot-skipping transmit schedule of the wake-up transmitter. The low-power protocol circuitry also includes a low-power processor configured to synchronize a clock of the wake-up receiver to a clock of the wake-up transmitter based on at least one of the synchronization signals.