23 results about "Physical Layer Convergence Protocol" patented technology

This disclosure provides systems, methods, and apparatuses for wireless communication. An example apparatus selects a resource unit (RU) for a physical (PHY) layer convergence protocol (PLCP) protocol data unit (PPDU). The selected RU includes a set of contiguous tones spanning a bandwidth. The apparatus maps the set of contiguous tones to a set of non-contiguous tones distributed across the frequency spectrum, and transmits the PPDU over the set of non-contiguous tones. Another example apparatus selects an RU of a group of RUs that collectively span a frequency spectrum, and formats a PPDU based on a first frequency bandwidth wider than the selected RU's bandwidth. The apparatus parses the contiguous tones of the selected RU to a set of non-contiguous tones spanning a unique segment of a second frequency bandwidth wider than the first frequency bandwidth, and schedules a transmission of the PPDU over the set of non-contiguous tones.

A wireless communication method for determining data includes: receiving, by a first communication device from a second communication device, a physical layer convergence protocol (PLCP) protocol data unit (PPDU) format and decoding, by the first communication device, the PPDU format, where the PPDU format includes a preamble with spreading and a media access control protocol data unit (MPDU).

This disclosure provides methods, components, devices and systems for techniques for tone mapping for 60 MHz distribution bandwidth. Some aspects more specifically relate to techniques for tone mapping for the 60 MHz distribution bandwidth that support distributed transmissions. In some examples, the wireless device may transmit obtain data for transmission in a physical layer convergence protocol (PLCP) protocol data unit (PPDU) over a PPDU bandwidth that exceeds 80 megahertz (MHz) and comprises an 80 MHz distributed transmission subblock, and the 80 MHz distributed transmission subblock may be punctured providing a 60 MHz distribution bandwidth. Tones of the 60 MHz distribution bandwidth may be shifted by tone shift values to align with a boundary of valid tones defined in the punctured 80 MHz distributed transmission subblock of the PPDU bandwidth.

This disclosure provides methods, devices and systems for increasing carrier frequencies for wireless communications in wireless local area networks (WLANs). Some implementations more specifically relate to packet designs that support wireless communications on carrier frequencies above 7 GHz. In some aspects, a wireless communication device may map a physical layer convergence protocol (PLCP) protocol data unit (PPDU) to orthogonal subcarriers according to existing tone plans associated with carrier frequencies below 7 GHz and may up-clock the PPDU for transmission on carrier frequencies above 7 GHz (such as by increasing the frequency of a clock signal used to convert the PPDU between the frequency domain and the time domain). In some implementations, the PPDU may conform to an existing PPDU format designed for sub-7 GHz wireless communications. In some other implementations, the PPDU may conform to a “green field” PPDU format optimized for wireless communications on carrier frequencies above 7 GHz.

This disclosure describes systems, methods, and devices related to physical layer (PHY) convergence protocol data unit (PPDU) early termination. A device may generate a frame comprising a header portion and one or more fields to carry information associated with one or more station devices (STAs). The device may encode the frame with an indication to at least one of the one or more STAs of a response behavior based on carly termination of the frame. The device may cause to send the frame to the one or more STAs.

This disclosure provides systems, methods, and apparatuses for wireless communication. An example apparatus selects a resource unit (RU) for a physical (PHY) layer convergence protocol (PLCP) protocol data unit (PPDU). The selected RU includes a set of contiguous tones spanning a bandwidth. The apparatus maps the set of contiguous tones to a set of non-contiguous tones distributed across the frequency spectrum, and transmits the PPDU over the set of non-contiguous tones. Another example apparatus selects an RU of a group of RUs that collectively span a frequency spectrum, and formats a PPDU based on a first frequency bandwidth wider than the selected RU's bandwidth. The apparatus parses the contiguous tones of the selected RU to a set of non-contiguous tones spanning a unique segment of a second frequency bandwidth wider than the first frequency bandwidth, and schedules a transmission of the PPDU over the set of non-contiguous tones.

This disclosure describes systems, methods, and devices related to optimized reliability. A device may determine a basic rate from an ultra-high reliability modulation and coding scheme (UHR-MCS) defined in a parameter set. The device may locate a non-HT reference rate by referencing a predetermined table based on the modulation and coding rate. The device may select a non-HT basic rate as a highest rate in a BSS basic rate parameter that is less than or equal to the non-HT reference rate. The device may map a plurality of new code rates for QPSK, 16-QAM, and 256-QAM to corresponding non-HT reference rates according to a predefined mapping procedure, wherein the device is operable to transmit a response frame to the UHR PPDU with the non-HT or non-HT duplicate PPDU and the rate determined by the non-HT basic rate.

This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to signaling in a trigger frame to support distributed transmissions via distributed resource units (dRUs). In some implementations, an access point (AP) may transmit a trigger frame soliciting a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) from a wireless station (STA), where the trigger frame carries RU allocation information identifying a distributed resource unit (dRU) allocated for the STA and carries tone mapping information indicating a selected spreading bandwidth design for the wireless channel or subchannel. The AP can support channel puncturing by selecting a particular spreading bandwidth design that controls how dRUs are mapped to non-contiguous tones spanning respective spreading bandwidths.

This disclosure provides methods, devices and systems for reducing PAPR in wireless communications. Some implementations more specifically relate to single-carrier frequency-division multiplexing (SC-FDM) techniques that can be used for wireless communications in wireless local area networks (WLANs). In some aspects, a wireless communication device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) as a series of symbols in the time domain and may transform a subset of the time-domain symbols into a number (Q) of frequency-domain samples based on a Q-point discrete Fourier transform (DFT). The wireless communication device maps the Q frequency-domain samples to a number (N) of orthogonal subcarriers (representing an orthogonal frequency-division multiplexing (OFDM) symbol), where N>Q, and transforms the N subcarriers into N time-domain samples, based on an inverse fast Fourier transform (IFFT), for transmission over a wireless channel.

A replicated Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU) transmission for a wireless device is described, the transmission having a reduced Peak to Average Power Ratio (PAPR). One example includes obtaining a first sub-PPDU from a PPDU including a data field having data content. A second sub-PPDU may also be obtained by copying the PPDU that includes data content of the PPDU. At least one of a phase rotation, a phase offset, or a phase ramp is applied to at least a portion of a second set of subcarriers of the broadband channel. A first sub-PPDU is transmitted on a first set of subcarriers of a broadband channel, and a second sub-PPDU is transmitted on a second set of subcarriers of the broadband channel.

The present disclosure provides for interpretation of reservation states in wireless packets, particularly methods, devices, and systems for interpreting reservation bits and values associated with different versions of a wireless communication protocol. In some implementations, a wireless communication device may determine whether to terminate or continue access of a physical layer protocol convergence protocol (PLCP) protocol data unit (PPDU) in the event it detects reserved bits in a physical layer preamble set to an unsupported value, such as a value different from a value defined by a version or issuance of a wireless communication protocol supported by the wireless communication device and harvesting. In some other aspects, a wireless communication device may determine whether to terminate or continue reception of a PPDU if it detects a field in a physical layer preamble that is set to a retention value, such as a value defined by a version or publication of a wireless communication protocol supported by the wireless communication device.

This disclosure provides methods, components, devices and systems for techniques for tone mapping for 60 MHz distribution bandwidth. Some aspects more specifically relate to techniques for tone mapping for the 60 MHz distribution bandwidth that support distributed transmissions. In some examples, the wireless device may obtain data for transmission in a physical layer convergence protocol (PLCP) protocol data unit (PPDU) over an 80 megahertz (MHz) distribution bandwidth. The 80 MHz distribution bandwidth may be punctured providing a 60 MHz distribution bandwidth. A first 20 MHz dRU tone plan, a second 20 MHz dRU tone plan, and a third 20 MHz dRU tone plan may be interleaved over the 60 MHz distribution bandwidth.

An apparatus and method are provided for allocating multiple resource units (RUs) to users in a wireless local area network (WLAN) system. The transmitting device of the WLAN system includes: a transceiver that generates a Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU) including a preamble and a payload, and transmits the generated PPDU to at least one receiving device; and a processor that controls the transceiver. The preamble includes multiple training fields and multiple signaling fields. Resource unit (RU) allocation information regarding the at least one receiving device is included in one of the multiple signaling fields. The RU allocation information includes a first subfield and a second subfield, the first subfield indicating the arrangement of RUs in the frequency domain corresponding to the PPDU, and the second subfield indicating a portion of the RUs to be combined to form multiple RUs.

A method for wireless communication performed by a wireless communication device and a wireless communication device are described. The method comprising mapping a first portion of a physical layer, PHY, preamble of a PHY protocol data unit, PPDU, to a first number of data subcarriers in accordance with a first sub-7 GHz PPDU tone plan that comprises N subcarriers including the first number of data subcarriers, the first portion including a legacy short training field, L-STF, a legacy long training field, L-LTF, and one or more signal, SIG, fields, transforming the N subcarriers into a first time-varying signal using an N-point inverse Fourier transform, IFFT, and a sampling rate, fs, that is equal to a bandwidth, BW, associated with transmission of the PPDU on a carrier frequency above 7 GHz such that a first subcarrier spacing, SCS, associated with the first portion of the PHY preamble is greater than 1.2 MHz and transmitting the PPDU including the first time-varying signal on the carrier frequency that is above 7 GHz.

This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to signaling in a trigger frame to support distributed transmissions via distributed resource units (dRUs). In some implementations, an access point (AP) may transmit a trigger frame soliciting a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) from a wireless station (STA), where the trigger frame carries RU allocation information identifying a distributed resource unit (dRU) allocated for the STA and carries tone mapping information indicating a selected spreading bandwidth design for the wireless channel or subchannel. The AP can support channel puncturing by selecting a particular spreading bandwidth design that controls how dRUs are mapped to non-contiguous tones spanning respective spreading bandwidths.

This disclosure provides methods, devices, and systems for wireless communications. The present implementations more specifically relate to trigger frame designs that support early validation of trigger frames. In some aspects, an AP may transmit a trigger frame soliciting a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) from one or more wireless stations (STAs), where the trigger frame includes one or more user information fields, an early frame check sequence (eFCS) following the user information fields, a series of padding bits following the eFCS, and a frame check sequence (FCS) following the series of padding bits. Each STA associated with the AP may receive and validate a first portion of the trigger frame based on the eFCS. Any non-solicited STAs that receive the trigger frame may enter a low power mode in response to validating the first portion of the trigger frame, without receiving the padding bits.

This disclosure provides methods, devices and systems for reducing PAPR in wireless communications. Some implementations more specifically relate to single-carrier frequency-division multiplexing (SC-FDM) techniques that can be used for wireless communications in wireless local area networks (WLANs). In some aspects, a wireless communication device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) as a series of symbols in the time domain and may transform a subset of the time-domain symbols into a number (Q) of frequency-domain samples based on a Q-point discrete Fourier transform (DFT). The wireless communication device maps the Q frequency-domain samples to a number (N) of orthogonal subcarriers (representing an orthogonal frequency-division multiplexing (OFDM) symbol), where N>Q, and transforms the N subcarriers into N time-domain samples, based on an inverse fast Fourier transform (IFFT), for transmission over a wireless channel.

This disclosure provides methods, devices and systems for wireless communications over a 320 MHz bandwidth. Some implementations more specifically relate to signaling techniques for indicating the bandwidth of a physical layer convergence protocol (PLCP) protocol data unit (PPDU) transmitted in a secondary 160 MHz channel of the 320 MHz bandwidth. In some implementations, an access point (AP) may transmit an aggregated PPDU (A-PPDU) that includes a first sub-PPDU transmitted within a primary 160 MHz channel and a second sub-PPDU transmitted within a secondary 160 MHz channel. In such implementations, the first sub-PPDU may carry bandwidth information indicating the bandwidth of the first sub-PPDU within the primary 160 MHz channel and the second sub-PPDU may carry bandwidth information indicating the 320 MHz bandwidth.

This disclosure describes systems, methods, and devices related to defer signal scrambling. A device may receive a packet queued for transmission using a predictable latency access category during a contention period. The device may transmit a defer signal at a fixed time offset from a start of the contention period, wherein the defer signal is transmitted using a physical layer convergence protocol data unit (PPDU) having a service field with a scrambler initialization set to a predefined bit sequence. The device may detect that other stations have not transmitted a defer signal and that their clear channel assessment indicates a busy channel. The device may decrement a backoff counter and contend for medium access based on contention parameters associated with the predictable latency access category.

Systems, methods, and instrumentalities are disclosed for range extension, basic service set (BSS) color labeling, and multi-user (MU) fragmentation and control in WLANs. A range extension notification / enablement scheme, a clear channel assessment (CCA), a headroom indication, and / or power scaling may be provided for a range extension mode. BSS color may be provided for multiple-BSSs under an access point (AP). Uplink (UL) transmission may be provided with different fragmentation capabilities. A high-efficiency (HE) trigger-based UL NDP physical layer convergence protocol (PLCP) protocol data unit (PPDU) frame may be provided. A station (STA) may receive a trigger frame comprising a null data packet (NDP) indication and a trigger type. The STA may determine that the STA is an intended recipient of the trigger frame. The STA may prepare an NDP PPDU for a control frame and / or a management frame based on the trigger type.

The invention relates to triggering of UL trigger-based replica physical layer convergence protocol data units. This disclosure describes systems, methods, and devices related to trigger-based replication. A device may generate a variant trigger frame that includes one or more fields for carrying information associated with a plurality of station devices (STAs). The apparatus may include scheduling of a trigger-based transmission of an uplink (UL) (TB) physical layer (PHY) convergence protocol data unit (PPDU) for the plurality of STAs. The device may cause transmission of the variant trigger frame to the plurality of STAs.

A wireless communication method for determining data includes: a first communication device receiving a Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU) format from a second communication device; and the first communication device decoding the PPDU format, where the PPDU format includes a spread spectrum preamble and a media access control protocol data unit (MPDU).

This disclosure provides methods, components, devices and systems for techniques for tone mapping for 60 MHz distribution bandwidth. Some aspects more specifically relate to techniques for tone mapping for the 60 MHz distribution bandwidth that support distributed transmissions. In some examples, the wireless device may obtain data for transmission in a physical layer convergence protocol (PLCP) protocol data unit (PPDU) over an 80 megahertz (MHz) distribution bandwidth. The 80 MHz distribution bandwidth may be punctured providing a 60 MHz distribution bandwidth. Cyclic shift delays (CSDs) are respectively applied to a plurality of distribution resource units (dRUs) of the PPDU in accordance with a first CSD index pattern defined for a first 60 MHz or a second 60 MHz of a 80 MHz distribution bandwidth or a second CSD index pattern defined for a first 40 MHz and a second 40 MHz of the 80 MHz distribution bandwidth.