64 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.

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.

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.

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.

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 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.

This disclosure provides methods, components, devices and systems for protection for enhanced long range (ELR) transmissions. Aspects more specifically relate request to send (RTS) and clear to send (CTS) signaling exchanges for configuration of an ELR physical layer protocol data unit (PPDU) that protects ELR RTS / CTS frames from interference. For example, a first wireless device may indicate, via a first frame, a modified network allocation vector (NAV) timeout duration that accounts for a full duration of an ELR frame. In some examples, the modified NAV timeout duration may be calculated to account for a difference in data rate of the ELR frame relative to non-ELR frames. For example, the first wireless device may transmit a first frame prior to an ELR RTS / CTS frame, and the first frame may indicate, via a duration field, the modified NAV timeout duration that is calculated in accordance with the ELR RTS / CTS frame.

The invention provides a communication method and device, a receiving end, a sending end and a relay node, and relates to the technical field of communication. The method is applied to a receiving end, and comprises the following steps: receiving a first request to send frame RTS sent by a sending end, the first RTS carrying position information of the sending end; according to the position information of the sending end, the position information of the receiving end, the first elevation angle estimation value and the first azimuth angle estimation value, determining whether a communicable direct view path in the terahertz frequency band exists between the sending end and the receiving end; the first elevation angle estimation value and the first azimuth angle estimation value are determined according to the first RTS; and when it is determined that a communicable direct-view path in the terahertz frequency band exists between the transmitting end and the receiving end, the antenna array is aligned with the transmitting end, and a first clear transmission frame CTS is broadcasted, and the first CTS carries the position information of the transmitting end and the position information of the receiving end. According to the scheme, the accuracy of visual judgment can be improved, and the problem that judgment errors are likely to be caused is avoided.

Managing the implementation of Distributed Resource Unit (DRU) and Dual Clear to Send (CTS) may be provided. Managing the implementation of DRU and Dual CTS comprises disallowing one or more DRU techniques for a spectrum that has a regulatory power limitation and signaling that the one or more DRU techniques are disallowed. Managing the implementation of DRU and Dual CTS can also comprise enabling one or more allowed DRU techniques.

Various techniques pertaining to a special dual clear-to-send (CTS) mode for improvement in collision avoidance in wireless communications are described. A first station (STA) transmits a request-to-send (RTS) and, in response, receives a first CTS from a second STA. The first STA waits to receive a second CTS from the second STA before transmitting data to the second STA responsive to the first CTS being of a first type and the second CTS being of a second type different from the first type. The first STA then transmits the data to the second STA upon passage of a waiting period.

The invention relates to a communication method executed at an access point (AP) device. The communication method comprises the following steps: receiving information of a client device associated with an expander device from the expander device connected with the AP device; obtaining information of a source device receiving a frame to detect a client device associated with the expander device; and in response to at least one of the client devices associated with the extender device being not detected within a time threshold, enabling a request to send and a send-to-send RTS / CTS mechanism to send data to the extender device. The disclosure also relates to an access point device, a communication method performed at an expander device, an expander device and a computer program product.

An embodiment of the present application discloses a data transmission method, including: sending an Extended Request to Send frame (ERTS) to a target node, so that when the target node sends an Extended Clear to Send frame (ECTS) after receiving the ERTS, a first missed node that receives the ERTS or the ECTS remains silent; sending a Request to Send frame (RTS) to the target node, so that when the target node sends a Clear to Send frame (CTS) after receiving the RTS, a second missed node that receives the RTS or the CTS remains silent; determining whether the CTS is received; if received, transmitting target data to the target node.