Abstract:
A method performed by a wireless device operating in a wireless network. The method includes generating a physical layer protocol data unit (PPDU) that includes a preamble portion and a data portion, wherein the preamble portion includes a signal field, wherein the signal field includes a bit that is set to binary '0' to indicate that the data portion of the PPDU includes a wake-up receiver preamble and wake-up receiver data. The method further includes wirelessly transmitting the PPDU.
Abstract:
A first wireless device may determine a bandwidth for transmitting a frame, calculate two or more Spatial Reuse (SR) parameter values for the bandwidth, set, using the SR parameter values, first and second SR fields of the frame based on the bandwidth and a channel center frequency in which the bandwidth is carried, and transmit the frame to a second wireless device on the bandwidth. The first and second SR fields may be set to a first value when the bandwidth is a 40 MHz bandwidth and the channel center frequency is in a 2.4 GHz band. The first and second SR fields may be set to the first value when the bandwidth is an 80+80 MHz bandwidth and the channel center frequency is in a 5 GHz band. The first value may be a minimum of SR parameter values for first and second bandwidths in the bandwidth.
Abstract:
In wireless communications for multi-users, an access point may generate a first frame for allocating resources to a plurality of stations. The first frame may contain an indication as to whether a station(s) is allocated at least one of a set of resource units (RUs) of a plurality of RUs, such as a center 26-tone RU. The set of resource units may be based on a channel bandwidth of the wireless communications. The indication may be contained in a common block field of signal fields, such as a common block field of high efficiency (HE) signal content channel(s) of an HE signal field. The station(s) may receive the first frame and determine whether the one of the set of RUs is allocated. The station(s) may transmit a second frame to the access point based on resource allocation information in the first frame. Other methods, apparatus, and computer-readable media are also disclosed.
Abstract:
A method implemented by a station (STA) in a Wireless Local Area Network (WLAN) to acknowledge a downlink (DL) multi-user (MU) physical layer (PHY) Protocol Data Unit (PPDU) transmitted by an access point (AP). The method includes receiving the DL MU PPDU, decoding a frame from the DL MU PPDU, where the frame includes an indication requesting the STA to provide a trigger-based immediate acknowledgement, determining whether trigger information for an uplink (UL) MU transmission has been obtained from the DL MU PPDU, responsive to a determination that the trigger information has been obtained from the DL MU PPDU, transmitting a trigger-based immediate acknowledgement frame to the AP during the UL MU transmission, according to the trigger information, and responsive to a determination that the trigger information has not been obtained from the DL MU PPDU, refraining from transmitting the trigger-based immediate acknowledgement frame to the AP.
Abstract translation:一种由无线局域网(WLAN)中的站(STA)实现以确认由接入点(AP)发送的下行链路(DL)多用户(MU)物理层(PHY)协议数据单元(PPDU) 。 该方法包括接收DL MU PPDU,解码来自DL MU PPDU的帧,其中帧包括请求STA提供基于触发的立即确认的指示,确定是否已经有针对上行链路(UL)MU传输的触发信息 从DL MU PPDU获得的响应于从DL MU PPDU获得的触发信息的确定,根据触发信息在UL MU传输期间向AP发送基于触发的即时确认帧,并响应于 确定没有从DL MU PPDU获得触发信息,避免向AP发送基于触发的即时确认帧。
Abstract:
In wireless communications, a high-efficiency (HE) physical layer protocol data unit (PPDU) includes an HE signal-B (SIG-B) field. In order to prevent undesirably large peak-to-average power ratio (PAPR) transmissions caused by repeated information in the HE SIG-B field, the HE SIG-B field may be scrambled. Scrambling of the HE SIG-B field may include scrambling of modulated data tones of each of one or more HE SIG-B field channels of the HE SIG-B field. This scrambling may include applying a phase rotation to the modulated data tones within each of the one or more HE SIG-B field channels. This scrambling (or phase rotation) is performed in addition to a phase rotation applied to each entire HE SIG-B field channel that is commonly referred to as a gamma rotation.
Abstract:
A wireless device receives a Multi-User Request-To-Send (MU-RTS) frame, descrambles first scrambled data in the MU-RTS frame using a first scrambling sequence, generates second scrambled data using a second scrambling sequence, and transmits a Clear-to-Send (CTS) frame including the second scrambled data in response to receiving the MU-RTS frame. The second scrambling sequence is an N-bit left cyclic shift of the first scrambling sequence. Another wireless device generates first scrambled data using a first scrambling sequence and transmits an MU-RTS frame including the first scrambled data. The wireless device receives a CTS frame transmitted in response to the MU-RTS frame, and descrambles second scrambled data in the CTS frame using a second scrambling sequence. The second scrambling sequence is an N-bit left cyclic shift of the first scrambling sequence. In either device, N may be 7, and lengths of the first and second scrambling sequences may be 127 bits.
Abstract:
A method is implemented by a station (STA) in a Wireless Local Area Network (WLAN) to update a Network Allocation Vector (NAV) maintained by the STA. The method includes receiving a first Physical Layer Protocol Data Unit (PPDU), determining whether a duration indicated in a control field of a preamble portion of the first PPDU is greater than a current NAV value, determining whether the first PPDU is received as an immediate response to a second PPDU previously transmitted by the STA, and updating the NAV maintained by the STA using the duration in response to a determination that the duration is greater than the current NAV value and the first PPDU is not received as an immediate response to the second PPDU previously transmitted by the STA.
Abstract:
Methods and devices are described that facilitate uplink multi-user acknowledgment transmissions. In particular, acknowledgment information may be located in a media access control (MAC) header of a payload section of a MAC Protocol Data Unit within a downlink multi-user frame. The acknowledgment information may be present in each resource unit of the downlink multi-user frame to indicate to each corresponding station properties/characteristics of a subsequent acknowledgment transmission. The properties may include one or more of (1) whether the acknowledgement transmission is multi-user or single user, (2) whether the acknowledgement transmission is transmitted immediately following receipt of the downlink multi-user frame or upon receipt of a multi-user block acknowledgement request frame, and (3) resource scheduling information for an uplink multi-user acknowledgement transmission.
Abstract:
A wireless device is described that may selectively include resource allocation information in a frame to be transmitted to one or more other wireless devices. The resource allocation may indicate channel/sub-channel assignment for each wireless device. The wireless devices may each utilize this received resource allocation information to determine the appropriate segment/sub-band of the transmission that is intended for their receipt/consumption. A first signaling field (e.g., HE-SIG-A) may indicate whether the resource allocation information is present in a second signaling field (e.g., HE-SIG-B) of the frame. For example, a single bit may be toggled to indicate the presence of the second signaling field and therefore the presence of the resource allocation information. Alternatively, multiple bits may be used to indicate the length of the second signaling field (e.g., a length of zero indicates the absence of the second signaling field and accordingly the absence of the resource allocation information).
Abstract:
According to an aspect of the present invention, a method for processing a physical layer protocol data unit (PPDU) by a station (STA) in a wireless LAN may be provided. The method may comprise the steps of: determining whether the PPDU is transmitted by a basic service set (BSS) different from a BSS to which the STA belongs or by a BSS identical to the BSS to which the STA belongs; and processing the PPDU using a first type of clear channel assessment (CCA) threshold value when it is determined that the PPDU is transmitted by a BBS different from the BSS to which the STA belongs. The first type of CCA threshold value may be higher than a second type of CCA threshold value which is used when it is determined that the PPDU is transmitted by a BSS identical to the BSS to which the STA belongs.