68 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 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 short training field (STF) designs and signaling that support distributed transmissions. A transmitting device that transmits data on a distributed resource unit (dRU) may transmit an STF sequence over a spreading bandwidth of the dRU according to an existing STF tone plan. Each STA allocated a dRU for transmission in a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) maps its STF sequence to one or more spatial streams and may apply one or more global cyclic shift delays (CSDs) to the STF sequence mapped to the one or more spatial streams, respectively. As such, different global CSDs may be assigned to different STAs so that each STA transmits its STF sequence with different amounts of delay.

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.

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 pilot tone designs that support distributed transmission. A transmitting device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) on a number (M) of tones representing a logical RU associated with the legacy tone plan and may further map the M tones to M noncontiguous subcarrier indices associated with a wireless channel. The transmitting device may transmit the PPDU, over the wireless channel, with a number (N) of pilot tones each having a respective location relative to the M tones as mapped to the M noncontiguous subcarrier indices. In some implementations, the relative locations of the N pilot tones may be different than relative locations of a number (K) of pilot tones associated with the logical RU.

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 pilot tone designs that support distributed transmission. A transmitting device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) on a number (M) of tones representing a logical RU associated with the legacy tone plan and may further map the M tones to M noncontiguous subcarrier indices associated with a wireless channel. The transmitting device may transmit the PPDU, over the wireless channel, with a number (N) of pilot tones each having a respective location relative to the M tones as mapped to the M noncontiguous subcarrier indices. In some implementations, the relative locations of the N pilot tones may be different than relative locations of a number (K) of pilot tones associated with the logical RU.

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 short training field (STF) designs and signaling that support distributed transmissions. A transmitting device that transmits data on a distributed resource unit (dRU) may transmit an STF sequence over a spreading bandwidth of the dRU according to an existing STF tone plan. Each STA allocated a dRU for transmission in a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) maps its STF sequence to one or more spatial streams and may apply one or more global cyclic shift delays (CSDs) to the STF sequence mapped to the one or more spatial streams, respectively. As such, different global CSDs may be assigned to different STAs so that each STA transmits its STF sequence with different amounts of delay.

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.

The present disclosure provides methods, devices, and systems for increasing carrier frequency for wireless communications in a wireless local area network (WLAN). Some implementations are more particularly directed to packet designs that support wireless communications on carrier frequencies above 7 GHz. In some aspects, a wireless communication device may map Physical Layer Convergence Protocol (PLCP) Protocol Data Units (PPDUs) to orthogonal subcarriers according to an existing tone plan associated with carrier frequencies below 7 GHz, and the PPDU may be upconverted for transmission on 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 follow an existing PPDU format designed for wireless communications below 7 GHz. In some other implementations, the PPDU may follow a "Green Field" PPDU format optimized for wireless communications on carrier frequencies above 7 GHz.

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 increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to trigger frame and physical layer convergence protocol (PLCP) protocol data unit (PPDU) designs that support distributed transmission. In some implementations, an access point (AP) may transmit a trigger frame soliciting a trigger-based (TB) PPDU from a wireless station (STA), where the trigger frame carries RU allocation information indicating a number (N) of tones allocated for the STA and carries tone distribution information indicating whether the N tones are allocated for a contiguous transmission or a distributed transmission. In some other implementations, an AP or a STA may transmit a PPDU carrying distributed signaling information indicating whether the PPDU is transmitted as a contiguous transmission or a distributed transmission.

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.

Methods, devices and systems are provided for performing for multi-user (MU) transmission. A wireless transmit / receive unit (WTRU) may be configured to receive a frame, decode the received frame and determine whether the received frame is a null data packet (NDP) multi-user (MU) media access control (MAC) physical layer convergence protocol (PLCP) protocol data unit (PPDU) (NDP MU MAC PPDU) based on meeting an NDP condition. The NDP MU MAC PPDU may correspond to an MU transmission and may include a PLCP header which includes an NDP signal (SIG) field having MU control information. Based on the received frame meeting the NDP condition, the WTRU may be further configured to process the NDP SIG field, generate a response based on the NDP SIG field and the MU control information, and transmit the response.

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 present invention discloses a wireless communication method and apparatus. A first station (STA) in a non-access point (non-AP) multi-link device (MLD) having restrictions on simultaneous transmission and reception (TX / RX) on a first link and a second link receives a Physical Layer Convergence Protocol (PLCP) protocol data unit (PPDU) on the first link or the second link. In response to the PPDU satisfying a condition, one or more other STAs in the non-AP MLD are prohibited from performing an operation.

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.

The present disclosure provides systems, methods, and devices for wireless communications. An example device selects a first resource unit (RU) among multiple resource units (RUs) for transmitting a physical (PHY) layer convergence protocol (PLCP) protocol data unit (PPDU) over a wireless medium. The first RU may include a set of contiguous tones occupying a first frequency bandwidth. The multiple RUs may collectively span a second frequency bandwidth greater than the first frequency bandwidth. The device uses a tone mapping vector and a tone mapping offset associated with the first RU to map the contiguous tone set of the first RU to a non-contiguous tone set distributed across a second frequency bandwidth. The device transmits the PPDU over the non-contiguous tone set distributed across the second frequency bandwidth.

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.

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.

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.