86 results about "Clear to send" patented technology

Methods and apparatuses for operating in multi-access point (AP) wireless networks are described herein. A method performed by an AP may include transmitting, using a set of resources, a multi-AP ready-to-send (RTS) frame to at least one other AP and a plurality of stations (STAs). The method may include transmitting another frame using a portion of the set of resources. The method may include receiving, using the portion of the set of resources, a clear-to-send (CTS) frame from at least one STA of the plurality of STAs in response to the another frame. The method may include transmitting, using the portion of the set of resources, a data frame to the at least one STA. The multi-AP RTS frame may include resource allocation information for the at least one other AP and the plurality of STAs.

This disclosure describes systems, methods, and devices related to enhanced channel access. A device may send a Multi-User Request to Send (MU-RTS) frame on a basic service set (BSS) primary channel to an overlapping basic service set (OBSS). The device may receive a Clear to Send (CTS) frame in response to the MU-RTS frame on the BSS primary channel. The device may initiate a switch to a non-primary channel access (NPCA) primary channel upon detection of a physical (PHY) preamble. The device may maintain NPCA operation on the NPCA primary channel until a network allocation vector (NAV) expires. The device may announce a location and bandwidth of the NPCA primary channel to associated stations (STAs).

A first station (STA) receives from a second STA, on a sub-7 GHz link, a cross-link Request to Send (XRTS) frame for reserving a mmWave link for transmission of a data frame by the second STA. In response to the XRTS frame, and based on the mmWave link being unavailable for transmission of the data frame by the second STA, first STA transmits to the second STA a response frame comprising one of: an acknowledgment of the XRTS frame; a denial to transmit on the mmWave link; or a grant of a service period (SP) on the mmWave link for transmission of the data frame by the second STA.

This disclosure provides methods, components, devices and systems for enhancements to request to send (RTS) and clear to send (CTS) exchanges. A first wireless device may receive a beacon frame indicating for the first wireless device to monitor a first channel for a first frame that schedules communication via one or more channels. The first wireless device may receive, from a second wireless device, the first frame indicating a channel bandwidth and a puncturing pattern of multiple available puncturing patterns for the channel bandwidth. The puncturing pattern may be associated with a first subset of a set of multiple channels of the channel bandwidth. The first wireless device may transmit, to the second wireless device, a second frame indicating that a second subset of channels is available and may receive one or more data packets via the second subset of channels.

In a Wireless Local Area Network system, a reception STA can receive a request to send (RTS) frame. The RTS frame may include bandwidth information. The reception STA can perform clear channel assessment (CCA) on the basis of the bandwidth information. The reception STA can determine a transmission channel on the basis of the result of the CCA and information about preset multiple resource units (MRUs). The reception STA can transmit a clear to send (CTS) frame through the transmission channel. The transmission channel is one of the preset MRUs and may be a channel in which the CCA result is idle. The preset MRUs may include a first MRU composed of a first 996 tone RU, a second 996 tone RU, a third 996 tone RU, and a 484 tone RU.

A method and apparatus may be used to support coordinated and cooperative sectorized transmissions. Power control and clear channel assessment for sectorized transmissions may be used, along with sectorized beacon and associated procedures. Transmissions in a network may be protected by a first access point (AP) sending an omni-directional transmission and a beamformed or sectorized transmission to a station (STA), an overlapping basic service set (OBSS) confirming a spatially orthogonal (SO) condition based on the omni-directional transmission, and a second AP monitoring the omni-directional transmission and confirming the SO condition. The STA may be configured to receive a request-to-send (RTS) frame indicating data is available for transmission, and transmit a cooperative sectorized (CS) clear-to-send (CTS) frame indicating an ability for multiple AP reception.

Methods and apparatus for transmitting data (e.g., low latency data) by a wireless device. In a method, a wireless device determines to transmit a buffered data frame, and further determines that one or more conditions are met for utilizing Prioritized Enhanced Distributed Channel Access (P-EDCA) parameters to transmit the buffered data frame. The P-EDCA parameters include shortened backoff parameters in relation to legacy EDCA backoff parameters. The method additionally includes transmitting a defer signal (e.g., a Clear to Send frame) to initiate a P-EDCA contention window, and transmitting the data frame in accordance with the P-EDCA parameters for reception by a second wireless device. In certain embodiments, the P-EDCA contention window includes an RTS / CTS frame exchange with a second wireless device using the P-EDCA parameters.

This disclosure provides methods, components, devices and systems for enhancements to request to send (RTS) and clear to send (CTS) exchanges. A first wireless device may receive a beacon frame indicating for the first wireless device to monitor a first channel for a first frame that schedules communication via one or more channels. The first wireless device may receive, from a second wireless device, the first frame indicating a channel bandwidth and a puncturing pattern of multiple available puncturing patterns for the channel bandwidth. The puncturing pattern may be associated with a first subset of a set of multiple channels of the channel bandwidth. The first wireless device may transmit, to the second wireless device, a second frame indicating that a second subset of channels is available and may receive one or more data packets via the second subset of channels.

A method for performing communications via a channel by a wireless communication device includes: in response to a physical layer protocol data unit (PPDU) with high priority traffic being expected to be transmitted, detecting whether the channel is idle; after detecting that the channel remains idle for an arbitration interframe space (AIFS), starting to perform a first backoff procedure; in response to a first backoff counter for the first backoff procedure reaching zero and the channel still being detected to be idle, transmitting a first request to send (RTS) frame via the channel, wherein a preamble of the first RTS frame is generated based on parameters dedicated to high-priority traffic; and in response to a clear to send (CTS) frame corresponding to the first RTS frame being received, transmitting the PPDU with the high priority traffic via the channel.

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.

Methods and apparatus for wireless channel reservation using extended range Request to Send (RTS) / Clear to Send (CTS) procedures to minimize collisions with OBSS devices. In a method, a first wireless device transmits an extended range RTS frame and receives, in response, a non-extended range CTS frame from a second wireless device. The first wireless device then transmits an extended range physical layer protocol data unit (PPDU) for reception by the second wireless device. This method may further include fragmenting the extended range PPDU into a plurality of extended range fragments, transmitting a first extended range fragment, receiving a non-extended range acknowledgement (ACK) from the second wireless device, and transmitting a second extended range fragment.

Methods and an apparatus are disclosed for orthogonal frequency division multiplexing (OFDM) and / or single carrier (SC) based multiple input multiple output (MIMO) hybrid beamforming (HBF) including determining the capabilities of a station (STA) such as the capability for hybrid beamforming, single user MIMO (SU-MIMO), and multi user MIMO (MU-MIMO). An announcement frame with a control trailer may be transmitted to signal a transmission configuration. The announcement frame may be a grant frame or a request to send (RTS) frame if the STA is SU-MIMO capable or a RTS frame or a DMG clear to send (CTS)-self frame if the STA is MU-MIMO capable. One or more directional multi-gigabit (DMG) antennas may be configured based on the announcement frame. One or more sounding symbols may be transmitted and feedback may be provided based on the sounding symbols. An HBF signal may be transmitted based on the sounding symbol(s) and / or feedback.

The present invention discloses a method for selecting a MIMO receiving path at the AP end of a wireless local area network: If there is a data frame to be sent currently, switch to the available transmitting antenna group, send the data and clear the sending status; If there is no data frame to be sent currently, switch to the optimal receiving antenna group, and the AP is in the listening state. If a received data frame is detected, set the receiving status to "1"; If the current receiving status is "1", clear the receiving status and update the terminal uplink service network quality dependence prediction matrix; If the receiving status is "0", or after updating the terminal uplink service network quality dependence prediction matrix, check the training status; If the current training status is "1", traverse all MIMO paths formed by the antenna groups and the terminal, perform AP transmission MIMO path optimization to update the antenna group - terminal MIMO transmission path status matrix, and obtain the updated antenna group receiving MIMO path weight matrix. The present invention also discloses a corresponding device for selecting a MIMO receiving path at the AP end of a wireless local area network.

An access point includes a first interface that wirelessly communicates using a first band; a second interface that wirelessly communicates using a second band; and a controller that selects one type of request to send (RTS) / clear to send (CTS) control from among three mutually different types using at least one of the first interface and the second interface, and carries out the selected one type of RTS / CTS control with a terminal.

Methods and apparatuses are described herein for multiple access schemes for Wireless Local Area Network (WLAN) with full-duplex radios. For example, an access point (AP), in response to receiving a request to send (RTS) from a first station (STA), may transmit a full-duplex clear to send (FD CTS) to the first STA and a full-duplex request to send (FD RTS) to a second STA. In response to transmitting the FD RTS to the second STA, the AP may receive a clear to send (CTS) from the second STA. The AP may transmit, to both the first STA and the second STA, a FD trigger frame that includes scheduling information to enables FD communication with the first STA for uplink (UL) data and the second STA for downlink (DL) data at a same time. The scheduling information may include timing information and channel information for the FD communication.

Technology disclosed herein may include an access point (AP) which may include a processing device. The processing device may transmit, at the access point, a first transmission in a first basic service set (BSS1) transmit opportunity (TXOP) in a first shared TXOP; send, from the access point to an additional access point, a first TXOP sharing request to send trigger frame; and receive, at the access point from the additional access point, a first clear to send (CTS) message.

This application is a divisional application of 202180078714.2. An access point, a station and a wireless communication method are disclosed. The wireless communication method includes: the access point transmits a multi-user ready-to-send trigger frame to multiple stations, wherein the multi-user ready-to-send trigger frame indicates whether a clear-to-send frame response will be transmitted by each of the multiple stations on a primary 20MHz channel, a primary 40MHz channel, a primary 80MHz channel, a primary 160MHz channel or a 320MHz channel, and at least one 20MHz channel is punctured in the primary 80MHz channel, the primary 160MHz channel or the 320MHz channel. It can solve the problems in the prior art, improve transmission opportunity protection, and provide a multi-user ready-to-send trigger / clear-to-send frame exchange process to protect transmission opportunities in an effective manner, achieve extremely high throughput, provide good communication performance, and / or provide high reliability.

Embodiments of the present disclosure relate to a communication method, a communication device, and a communication system. The communication method comprises: a station device determines a clear to send (CTS) frame, the CTS frame being sent in response to a multi-user request to send (MU-RTS) frame, and the CTS frame indicating whether the station device has a non-periodic communication service of other wireless communication media; and sends the CTS frame. Mutual interference between a Wi-Fi communication service and services of other wireless communication media is prevented, thereby improving system throughput and causing a system to be suitable for UHR transmission requirements.

This disclosure provides methods, components, devices and systems for medium protection for shared access points in coordinated time division multiple access. Some aspects more specifically relate to enhancing the likelihood that a shared access point (AP) is able to receive a message from a sharing AP that shares a portion of a transmit opportunity (TXOP) that has been obtained by the sharing AP. In some examples, shared AP may perform medium management to reduce the likelihood that one or more other wireless communication devices will occupy the wireless medium at an expected transmission time of the message from the sharing AP. Medium management performed by the shared AP may include, for example, one or more of implementing short TXOP durations, enabling ready-to-send (RTS) and clear-to-send (CTS) exchanges, scheduling of uplink access for associated wireless communication devices, or terminating one or more intra basic service set (BSS) transmissions.

Network Allocation Vector (NAV) protection in a relay may be provided. Providing NAV protection in a relay can include determining a frame sequence for sending a data signal to a destination Station (dSTA). A Multi-User Request to Send (MU-RTS) is transmitted, the MU-RTS comprising a MU-RTS user information field with a plurality of available bits, the plurality of available bits including one or more frame sequence bits of indicating the frame sequence. One or more Clear to Send (CTS) signals is received, and the data signal is transmitted in response to receiving the CTS. One or more acknowledge signals are received based on the frame sequence.

An access point includes a first interface that wirelessly communicates using a first band; a second interface that wirelessly communicates using a second band; and a controller that selects one type of request to send (RTS) / clear to send (CTS) control from among three mutually different types using at least one of the first interface and the second interface, and carries out the selected one type of RTS / CTS control with a terminal.

A station may receive a frame transmitted to a plurality of stations (STAs). The frame may indicate a first frequency resource allocated for the STA and a second frequency resource allocated for another STA of the plurality of STAs. The STA may transmit a data frame using the first frequency resource and receive an acknowledgement frame that acknowledges receipt of the data frame. The STA may receive a multi-user request to send (MU RTS) frame transmitted to the plurality of STAs and may subsequently transmit a clear to send (CTS) frame in response to receipt of the MU RTS frame. The RTS / CTS transmissions may occur prior to transmission of the data frame.

Network Allocation Vector (NAV) protection in a relay may be provided. Providing NAV protection in a relay can include determining a frame sequence for sending a data signal to a destination Station (dSTA). A Multi-User Request to Send (MU-RTS) is transmitted, the MU-RTS comprising a MU-RTS user information field with a plurality of available bits, the plurality of available bits including one or more frame sequence bits of indicating the frame sequence. One or more Clear to Send (CTS) signals is received, and the data signal is transmitted in response to receiving the CTS. One or more acknowledge signals are received based on the frame sequence.

A method and system including: transmitting, by an access point (AP), a multi-user request to send (MU-RTS) frame requesting a non-AP station (non-AP STA) to respond with a clear to send (CTS) frame on one or more 20 MHz non-primary subchannels; and receiving, by the AP, a CTS frame from the non-AP STA on the one or more 20 MHz non-primary subchannels.

A first station (STA) receives a Cross Link Request to Send (XRTS) frame from a second STA over a less than 7 GHz link for reserving a millimeter wave link for the second STA to transmit data frames. In response to the XRTS frame and based on the millimeter wave link being unavailable for the second STA to transmit the data frame, the first STA transmits a response frame to the second STA, the response frame comprising one of: an acknowledgement of the XRTS frame; a rejection of transmission on the millimeter wave link; or granting a service period (SP) on the millimeter wave link for the second STA to transmit the data frame.

The application relates to a channel competition method and device, which can limit the station from frequently initiating competition, thereby reducing interference on other devices. In the method, a station acquires a channel competition rule and performs channel competition according to the channel competition rule, and the channel competition rule is a first rule, a second rule, a third rule or a fourth rule. The first rule comprises that the number of RTS frames sent during the running of each competition timer in a plurality of competition timers is less than or equal to a first threshold value; the second rule comprises that channel competition is performed after a target time length; the third rule comprises that the station is prohibited from sending a clear to send (CTS) frame with a destination address of the station; and the fourth rule comprises that the station transmits an RTS frame as an initial frame to start a TXOP before the MSD timer expires, and the number of started TXOPs is less than or equal to a second threshold value. The fourth rule further comprises at least one of the following: a CCA-ED threshold before the MSD timer expires is dot11OFDMEDThreshold, or a condition for resetting the MSD timer to 0 is not set.

The present disclosure provides systems, methods, and apparatus, for wireless communications that can be used to establish a restricted target wake time (TWT) session over a wireless medium. In some implementations, an access point (AP) establishes a restricted TWT session for one or more wireless stations (STAs) associated with latency-sensitive traffic, the restricted TWT session including a restricted TWT service period (SP) during which the AP reserves access to the wireless medium for only the one or more STAs associated with the latency-sensitive traffic. The AP transmits a clear to send (CTS) frame at the start of each restricted TWT SP, the CTS frame indicating to other STAs that the wireless medium is unavailable for the duration of the corresponding restricted TWT SP. The AP transmits latency-sensitive data to or receives latency-sensitive data from the one or more STAs during at least one restricted TWT SP.

Methods and apparatuses are described herein for increasing reliability in IEEE 802.11 networks. A first station (STA) may generate a set of configurations that meets reliability requirements of a traffic flow associated with a frame. Each of the set of configurations may comprise a number of replications of the frame, a channel bandwidth, and a modulation and coding scheme (MCS). The first STA may transmit, to a second STA, a plurality of request to send (RTS) frames over a plurality of channels. The first STA may receive, from the second STA, a plurality of clear to send (CTS) frames indicating whether the plurality of channels are available. The first STA may then select, based on the number of available channels, a first configuration from the set of configurations. The first STA may transmit, based on the first configuration, a plurality of copies of the frame simultaneously over the available channels.

The embodiment of the invention relates to a communication method, communication equipment and a communication system. The communication method comprises the following steps: station equipment determines to clear to send a CTS frame; wherein the CTS frame is sent in response to a multi-user request to send an MU-RTS frame; the CTS frame identifies whether aperiodic communication services of other wireless communication media exist in the station equipment or not; and sending the CTS frame, so that mutual interference between a Wi-Fi communication service and services of other wireless communication media is avoided, and the system vomiting amount is improved, so that the system is suitable for the UHR transmission requirement.

A method in a communication system including an access point and a plurality of stations, includes: selecting, at the access point, a quasi-omni-directional beam for use in transmitting and receiving control frames to and from the stations; selecting, at each station, one of a plurality of directional beams for use in transmitting and receiving control frames to and from the access point; at each of the stations, pausing transmission of Request To Send (RTS) control frames responsive to detecting (i) a RTS control frame from the access point to any one of the stations, or (ii) a Clear to Send (CTS) control frame from the access point to any one of the stations; wherein pausing transmission of RTS control frames is for a duration of time provided in the detected RTS control frame or CTS frame.