48 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.

This disclosure provides systems, methods, and apparatuses for wireless communication that can be used to reduce the peak-to-average power ratio (PAPR) of data transmissions by increasing the degree of randomness with which data is scrambled for transmission over a wireless medium. In some implementations, a transmitting device may determine a scrambler seed value that includes at least 11 bits, where at least one of the 7 least significant bits (LSBs) of the scrambler seed value has a non-zero value. The transmitting device may generate a scrambling sequence based on the scrambler seed value and a polynomial, may construct a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes a multi-user (MU) request-to-send (RTS) frame and the scrambler seed value, may scramble one or more portions of the PPDU based on the scrambling sequence; and may transmit the PPDU over a wireless medium.

An operating method of a first apparatus communicating with a second apparatus in a wireless network includes: receiving, from the second apparatus, a trigger frame including information about a random access frequency band and information about an intermediate transmission time, and transmitting a physical layer convergence procedure (PLCP) service data unit (PSDU) including a short training field (STF) and first data to the second apparatus through the random access frequency band at the intermediate transmission time, wherein the intermediate transmission time is in a physical layer protocol data unit (PPDU) transmission period.

Provided is a wireless communication terminal. The wireless communication terminal includes a transceiver, and a processor. The processor is configured to receive a signaling field of a first PLCP Protocol Data Unit (PPDU) through the transceiver, and access a channel based on information identifying a Basic Service Set (BSS) indicated by the signaling field.

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, 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 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.

A method performed by an apparatus in a wireless local area network (WLAN) is provided. The method comprises: transmitting a first physical layer convergence protocol (PLCP) protocol data unit (PPDU) for a first variant including a first control field and a second PPDU for a second variant including a second control field in A(aggregated)-PPDU, wherein the second PPDU for the second variant is transmitted in duplicate (DUP) mode; and receiving a first response to the first PPDU and a second response to the second PPDU in A-PPDU based on the first control field and the second control field, respectively, wherein the first variant is based on a first protocol standard and the second variant is based on a second protocol standard, and wherein the second protocol standard is beyond version of the first protocol standard.

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.

The invention provides a frame format generation and analysis system and a frame format generation and analysis method. The frame format generation and analysis system comprises a sending device and a receiving device. The transmitting device is configured to interpolate a feature sequence in a physical layer convergence protocol preamble, interpolate a reserved sequence between the feature sequence and a start frame definition, and transmit the physical layer convergence protocol preamble. The receiving device is used for receiving a physical layer convergence protocol preamble and analyzing whether the physical layer convergence protocol preamble comprises a feature sequence, and if the physical layer convergence protocol preamble comprises the feature sequence, the receiving device generates an enabling signal so as to enable a user-defined protocol.

A frame format generation and analysis system includes a transmitting device and a receiving device. The transmitting device is configured to insert a signature sequence in a physical layer convergence protocol (PLCP) preamble, insert a remaining sequence between the signature sequence and a start frame delimiter (SFD), and transmit the PLCP preamble. The receiving device is configured to receive the PLCP preamble, and analyze whether the PLCP preamble includes the signature sequence. If the PLCP preamble includes the signature sequence, the receiving device generates an activating signal for activating a user-defined protocol.

A wireless station (STA) (103A) in a wireless local area network (WLAN) (100) performs a method of avoiding media access control (MAC) padding of physical layer convergence protocol data units (PPDUs), such as trigger-based (TB) PPDUs. This method can reduce the current or power consumption of the STA (103A), which in turn can optimize the STA (103A) and, in some cases, the entire WLAN (100). In one example, the method includes the STA (103A) receiving a trigger frame from an access point (AP) (101). The trigger frame specifies the length of the PPDU. The method further includes the STA (103A) generating a TB PPDU based on the specification in the trigger frame. In particular, the STA (103A) generates a PPDU with a length less than the length specified by the trigger frame. The method also includes the STA (103A) transmitting the generated PPDU to the AP (101).

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.

The present disclosure provides methods, devices, and systems for increasing carrier frequencies for wireless communication in wireless local area networks (WLANs). Some implementations relate more specifically to packet designs that support wireless communication at 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 an existing tone plan associated with a carrier frequency below 7 GHz, and up - clock the PPDU for transmission at a carrier frequency 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 communication. In some other implementations, the PPDU may conform to a “greenfield” PPDU format optimized for wireless communication at carrier frequencies above 7 GHz.

This disclosure describes systems, methods, and devices related to enhanced ICF switching. A device may cause an initial control frame trigger frame (ICF TF) to be transmitted to one or more transmit opportunity (TXOP) responders. The device may identify a first response from at least one of the one or more TXOP responders, where the first response uses a non-high throughput (HT) repetitive physical layer (PHY) convergence protocol data unit (PPDU) format. The device may identify a second response from at least one of the one or more TXOP responders.

Methods and corresponding wireless devices are disclosed for a wireless device to perform media access control (MAC) padding that avoids physical layer convergence protocol data units (PPDUs), such as trigger-based (TB) PPDUs, etc. The method may reduce the current or power consumption of the wireless device, which in turn may optimize the wireless device, and in some cases, may optimize the entire wireless local area network (100). In one example, the method includes a wireless device receiving a trigger frame. The trigger frame specifies a length of the PPDU. The method further includes the wireless device generating a TB PPDU based on the specification in the trigger frame. In particular, the wireless device generates a PPDU having a length less than a length specified by the trigger frame. The method further comprises the STA (103A) transmitting the generated PPDU to the AP (101).

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.

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.

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 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 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 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 provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for physical (PHY) layer control signaling. A first physical layer convergence protocol (PLCP) protocol data unit (PPDU) may precede a second PPDU. The first PPDU may be referred to as a PHY control PPDU and may include a physical layer control signaling field (CNT-SIG) that informs one or more stations (STAs) regarding a physical layer configuration they should use for the second PPDU. The PHY control PPDU may enable dynamic subchannel assignments for one or more identified STAs, legacy STAs, or sub-bandwidth operating devices. The techniques of this disclosure may enable sharing of a wide bandwidth wireless channel by different types of devices or different basic service sets (BSSs) assigned to different subchannels of the wireless channel.

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.

The invention provides a communication apparatus and a communication method. A communication device is a control unit and includes a communication unit that generates a frame including STA information, which is information about STAs, at least one of the STA information being probe NDP information for AI / ML, which is used for artificial intelligence / machine learning, and the NDP being a null data PPDU, which is a null data physical layer convergence process protocol data unit. The communication unit transmits the generated frame.

A device, a system, and a method for power spectrum density (PSD) limited transmissions are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to generate a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) that includes a base modulation frequency unit, where the base modulation frequency unit is duplicated to unpunctured subchannels of the PPDU with a phase rotation, and transmit the PPDU in accordance with a power spectrum density (PSD) limit.

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.