Abstract: This disclosure provides methods, devices and systems for radio frequency (RF) sensing in wireless communication systems. In some implementations, a transmitter device transmits sounding sequences configured for channel estimation over a wireless channel to a receiver device. The transmitter device also transmits or receives non-sounding frames associated with a channel report of the receiver device. The transmitter device transmits a frame soliciting the channel report from the receiver device. The transmitter device receives the channel report, which may include channel state information (CSI) of the wireless channel responsive to at least the sounding sequences. Some types of channel reports may take longer to generate than other types of channel reports. Transmitting or receiving the non-sounding frames during the time period may prevent other devices from accessing the wireless channel when the receiver device needs additional time to generate a certain type of channel report.

Abstract: In some implementations, an initiator device establishes a measurement session with each of a plurality of responder devices based at least in part on their capabilities. The initiator device negotiates, with each of the responder devices, a respective set of one or more sensing parameters based at least in part on the capabilities of the initiator device and the capabilities of the respective responder device, the respective sets of sensing parameters associated with the responder devices being identified by a unique Measurement Setup identifier (ID). The initiator device performs one or more measurement instances with the responder devices based on the respective sets of sensing parameters, each measurement instance identified by a unique Measurement Instance ID and the respective Measurement Setup ID. The initiator device obtains, from each responder device, one or more measurement reports indicating channel state information (CSI) based on the one or more respective measurement instances.

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for radio frequency (RF) sensing in the millimeter-wave frequency spectrum that can be performed over multiple phases. During a session setup phase, a radar initiator identifies one or more wireless stations (STAs) that are capable of radar ranging and sets up a radar measurement session that includes at least one of the identified STAs. During a measurement negotiation phase, the radar initiator performs a respective beamforming training operation with each STA and indicates, to each STA, one or more parameters associated with the radar measurement session. During a radar measurement phase, the radar initiator transmits radar setup information to, and receives ranging information from, each STA. In some aspects, the radar initiator may perform an object detection operation that indicates a location of an object associated with the ranging information received from each radar STA.

Abstract: Various aspects of the disclosure relate to co-existence of millimeter wave (mmW) communication and radar. In some aspects, a device that supports mmW communication and radar operations may determine whether or when to conduct radar operations based on information obtained about a nearby mmW network. For example, prior to sending radar signals, the device may monitor for mmW communication signals. As another example, the device may send at least one mmW communication signal to reserve a communication medium for subsequent radar operations. As yet another example, the device may conduct radar operations during idle or allocated time periods defined by the mmW network.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for accommodating immediate response to frames transmitted under time division multiplexed (TDM) access. Certain aspects of the present disclosure also provide methods and apparatus for indicating a frame is transmitted under time division multiplexed (TDM) access.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for enhancing a beamforming training procedure.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for signaling a receive antenna mode to use during beamforming training procedure. For example, an apparatus for wireless communications, may generally include a processing system configured to generate a first frame having one or more beamforming training fields to be output for transmission to a wireless device using a directional transmit antenna mode and an indication whether the wireless device is to be in an Omni-directional receive antenna mode to receive the one or more beamforming training fields, and a first interface configured to output the first frame for transmission.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for spatial reuse for neighboring nodes of distribution networks, so they may transmit without causing interference to nodes of the distribution network.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for generating frames with dual mode channel estimation fields (CEFs) that may accommodate devices with different processing capabilities. In some examples, a frame that is generated comprises a first portion for transmission on separate channels, and a second portion for transmission using channel bonding. The second portion has a training field including first complementary sequences, a first channel estimation field (CEF) including second complementary sequences, and a second CEF including one of the first complementary sequences of the training field and a subset of the second complementary sequences of the first CEF.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for enhancing a sector sweep. The apparatus generally includes a processing system configured to generate a first set of frames and a second set of frames. The apparatus also includes a first interface configured to output the first set of frames for transmission to a wireless node via a first set of beams, wherein each beam of the first set is wider in a first dimension than a second dimension, and output the second set of frames for transmission to the wireless node via a second set of beams, wherein each beam of the second set is wider in the second dimension than the first dimension.

Abstract: A technique is disclosed for reducing interference in a communication system including a plurality of wireless devices. A first device transmits a frame (e.g., an RTS frame or a CTS frame) to a second device, the frame including information from which a non-target third device may use to estimate potential interference at the first device based on a proposed transmission to a fourth device. The information includes at least one of an interference and sensitivity factor (ISF), transmit power, and reciprocity factor (a difference between an antenna receive gain and an antenna transmit gain). Using the information in the frame to estimate the potential interference at the first device, the third device may choose to proceed with the proposed transmission if the estimated potential interference is less than a threshold; or withdraw or modify the proposed transmission if the estimated potential interference is greater than or equal to a threshold.

Abstract: A first apparatus may identify a first set of antenna settings and a second set of antenna settings based on beamforming training with a second apparatus, and the first set of antenna settings may correspond to a first path that is different from a second path with the second apparatus corresponding to the second set of antenna settings. The first apparatus may generate a first request frame including an indication to use the first path for at least one first field of a first measurement frame, and may output the first request frame for transmission to the second apparatus. The first apparatus may obtain, from the second apparatus, a first measurement frame via the first set of antenna settings for reception of at least one first field and via the second set of antenna settings for reception of one or more second fields of the first measurement frame.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for providing secure network association services to a device seeking to join a distribution network.

Abstract: This disclosure provides methods, apparatuses, wireless nodes and computer-readable mediums for wireless communications. In one aspect, wireless, or WiFi, sensing involves a device transmitting WiFi signals, while another device, or devices, use reflections of those signals to map and measure the environment. WiFi sensing may be used to obtain rough dimensions of a room, identify stationary objects in a room, or detect objects (such as people) moving into, out of, or within a room. Multi-static WiFi sensing can occur when two devices are simultaneously transmitting and receiving WiFi signals.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for enhancing a beamforming training procedure. For example, an apparatus for wireless communications may include a processing system configured to generate a first transmit beamforming refinement frame, a first interface configured to output the first transmit beamforming refinement frame for transmission to a wireless node, wherein a first portion of the first transmit beamforming refinement frame is output for transmission via a first transmit beamforming sector and further wherein training fields of the first transmit beamforming refinement frame are output for transmission via two or more second transmit beamforming sectors, and a second interface configured to obtain a first feedback frame from the wireless node indicating one of the second transmit beamforming sectors. The apparatus may be configured to use the indicated second transmit beamforming sector for communication with the wireless node.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for enhancing a beamforming training procedure.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for spatial reuse for neighboring nodes of distribution networks, so they may transmit without causing interference to nodes of the distribution network.

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, systems and methods for a link margin procedure that accommodates reporting link parameters, such as link margin, for multiple streams.

Abstract: Receive operations at a receiver may be improved by performing one or more estimations before receiving data. For example, the time between the end of the header transmission and the start of the data transmission may be used to send patterns to be used for an estimation. In some implementations, sequences of pilot repetitions may be used to adapt the operation of a receiver. In some implementations, short training fields may be used to adapt the operation of a receiver.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for enhancing a sector sweep. The apparatus generally includes a processing system configured to generate a first set of frames and a second set of frames. The apparatus also includes a first interface configured to output the first set of frames for transmission to a wireless node via a first set of beams, wherein each beam of the first set is wider in a first dimension than a second dimension, and output the second set of frames for transmission to the wireless node via a second set of beams, wherein each beam of the second set is wider in the second dimension than the first dimension.