49 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.

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.

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.

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.

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.

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.

The present disclosure relates to a method and apparatus for supporting enhanced long range (ELR) transmission in a wireless LAN system. A station (STA) according to the present disclosure may: receive a multi-user request to send (MU-RTS) trigger frame; and on the basis of an information field included in the frame, transmit a clear to send (CTS) frame in an ELR PPDU format. The MU-RTS trigger frame may comprise PPDU format information of the CTS frame and modulation and coding scheme (MCS) information corresponding to an ELR PPDU. This enables the STA to mitigate CTS reception instability due to a difference in transmit power between downlink (DL) and uplink (UL). In addition, a plurality of STAs may reduce the possibility of collisions in a multi-user environment and reduce transmission delay by simultaneously transmitting ELR PPDU-based CTS frames. Therefore, the present technology improves the reliability and protection efficiency of RTS / CTS procedures and provides stable communication quality even in a high-density network environment.

The present application relates to an access point (AP) and an apparatus for use in an AP, where the apparatus includes processor circuitry configured to cause the AP to: receive a single user trigger frame (SU-TF) from a shared AP, where the SU-TF is used to allocate a time within a transmission opportunity (TXOP) of the shared AP to a plurality of communication stations including the AP, and where the SU-TF includes a duration field, where the duration field is configured to receive the SU-TF from the shared AP; the duration field indicates a duration in which contention is allowed, and only the plurality of communication stations are allowed to compete for the communication channel in the duration in which contention is allowed; and transmitting a clear to send (CTS) frame to the shared AP after receiving the SU-TF and before contending for the communication channel, where the CTS frame includes a Receiver Address (RA) field set as a Media Access Control (MAC) address of the shared AP.

A first access point (AP) receives from a second AP, during a transmission opportunity (TXOP) of the second AP, a first frame polling the first AP regarding receiving a first time allocation and a third AP regarding receiving a second time allocation within the TXOP. The first AP transmits to the second AP a second frame in response to the first frame, indicating that the first AP wishes to receive the first time allocation. The first AP receives from the second AP a third frame allocating the first time allocation to the first AP and transmits to the second AP a clear to send (CTS) frame in response to the third frame. Based on the first AP finishing communicating before an end of the first time allocation, the first AP transmits to the second AP a fourth frame, where the fourth frame comprises a TXOP return frame.

Examples described herein relate to a switch circuitry that includes circuitry to determine if a received packet comprises a control packet; circuitry to determine congestion metrics based on receipt of at least one control packet, wherein the at least one control packet comprises a Request To Send (RTS) or Clear To Send (CTS); and circuitry to transmit at least one of the congestion metrics in at least one packet to a sender and / or receiver network interface device.

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.

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.