9 results about "Inter frame space" patented technology

A first station (STA) receives, from a second STA, a block acknowledgement request (BAR) frame: soliciting a block acknowledgement (BA) frame from the first STA, initiating a transmit opportunity (TXOP), and indicating whether the first STA is required to perform a carrier sense (CS) operation during a short inter frame space (SIFS) duration after receiving the BAR frame. Based on the BAR frame indicating that the first STA is required to perform the CS operation, the first STA performs the CS operation during the SIFS duration after receiving the BAR frame. Based on a result of the CS operation indicating idle, the first STA transmits, to the second STA and in response to the BAR frame, the BA frame.

A method for enforcing Quality of Service (QoS) requirements in a WiFi communication network of a vehicle or other host system with one or more wireless sensors, i.e., WiFi or WiFi-enabled sensors, involves capturing wireless traffic on one or more channels of the network as captured WiFi traffic using a central coordinator (CC). O ) node of the network. The procedure involves identifying an access category (AC) of the captured traffic as corresponding to the sensor traffic, i.e., sensor operations of the wireless sensors. The CC OThe node assigns a higher priority to WiFi sensor traffic than to other wireless traffic on the channel(s). One or more QoS parameters can be changed, including an Arbitrary Inter-Frame Space Number (AIFSN), a wait window (CW) size, a transmit opportunity (TXOP) value, and / or a respective threshold for a Request-to-Send (RTS) frame and a Clear-to-Send (CTS) frame for the captured sensor traffic.

To ensure fairness of an SL entity in channel contention.SOLUTION: A communication method is applied to an ML entity, the ML entity supporting a primary link and at least one nonprimary link. A backoff counter is disposed on the primary link, and no backoff counter is disposed on the nonprimary link. The communication method includes a step in which the ML entity performs a backoff procedure of the primary link based on the backoff counter of the primary link; and a step in which when a count value of the backoff counter is 0, the ML entity sends a first PPDU on each first link in K first links, the K first links including the primary link and K-1 first nonprimary links, and the first nonprimary link being in an idle state in a first inter-frame space before a time point at which the count value of the backoff counter decreases to 0.SELECTED DRAWING: Figure 5

The present invention discloses methods and apparatuses for a UE and its serving base station in a 5G NR system to signal channel scanning or channel sensing, thereby allowing for Channel Occupancy Time (COT) sharing prior to transmission. The COT sharing can be initiated either by the base station or by the UE through assertion of the CCA indication to enable channel sensing by the UE or the base station. When the UE receives and decodes the asserted CCA indication during a downlink transmission, the UE can perform channel sensing during the Short Inter-Frame Space (SIFS) between the downlink transmission and the scheduled uplink transmission. When the UE detects that the sensed RF energy on the expected transmission band is greater than the energy detection threshold, the UE can refrain from transmitting during the scheduled uplink transmission. Otherwise or when the CCA indication is de-asserted, the UE can transmit during the scheduled uplink transmission without performing channel sensing.

In a channel listening method, a non-simultaneous transmit and receive multi-link device (NSTR MLD) receives a first response frame on a first link and a second response frame on a second link, wherein an end time of the first response frame is later than an end time of the second response frame, and the first link and the second link belong to a NSTR link pair. The NSTR MLD determines that at least one of the first response frame and the second response frame fails to be received. In response to the determination, the NSTR MLD performs channel listening in a first interframe space after the first response frame ends, wherein a duration of the first interframe space is less than or equal to a duration of a point coordination function interframe space (PIFS).

The present disclosure relates to a method and device for retransmitting an initial control response in a wireless LAN system. A method performed by an electronic device operating as a first station (STA) in a wireless LAN network according to an embodiment of the present disclosure comprises the steps of: receiving an initial control frame (ICF) from a second STA; transmitting a first initial control response (ICR) to the second STA after a short inter frame space (SIFS) from a time point at which reception of the ICF is completed; and transmitting a second ICR corresponding to the first ICR to the second STA when a wireless medium (WM) is in an idle state until after a point coordination function inter frame space (PIFS) from a time point at which transmission of the first ICR is completed, and ICR retransmission is activated.

A host system and method implementing quality of service requirements for a WIFI sensing application. A method for enforcing Quality of Service (QoS) requirements in a WiFi communication network of a vehicle or another host system having one or more wireless sensors, WiFi or WiFi-enabled sensors, includes detecting, using a central coordinator (CCo) node of the network, wireless traffic over one or more channels of the network as detected WiFi traffic. The method includes identifying an access category (AC) of the detected traffic as corresponding to sensed traffic, i.e., sensing operation of the wireless sensor. The CCo node assigns a higher priority to the WiFi sense traffic relative to other wireless traffic on the channel (s). One or more QoS parameters may be modified, including any inter-frame space number (AIFSN), contention window (CW) size, transmission opportunity (TXOP) value, and / or respective thresholds for request to send (RTS) frames and allowed to send (CTS) frames for detected sensed traffic.

A station (STA) receives from an access point (AP) a beacon frame indicating a value of a multi-user (MU) enhanced distributed channel access (EDCA) timer, where the MU EDCA timer indicates a duration of time during which the STA uses MU EDCA parameters for channel access. The STA starts the MU EDCA timer and switches from a primary channel (PCH) to a non-primary channel access (NPCA) PCH based on determining that a physical layer (PHY) protocol data unit (PPDU) being received via the PCH comprises an inter-basic service set (inter-BSS) PPDU. After switching to the NPCA PCH, the STA sets an arbitration interframe space number (AIFSN) for an access category (AC) to zero and suspends EDCA on the NPCA PCH, based on the AIFSN being equal to zero, until the MU EDCA timer reaches a value of zero.

This communication device acquires a transmission opportunity (TXOP) for transmitting a radio frame. The communication device uses a first radio frame to ensure a first TXOP period. The communication device uses a Trigger frame to allocate a second TXOP period within the first TXOP period to another communication device. During the second TXOP period, the communication device receives a prescribed control frame indicating that the second TXOP period will end. When the communication device receives the prescribed control frame during the second TXOP period, the communication device performs control so as to transmit a second radio frame after the passage of a prescribed Inter Frame Space (IFS) time from the reception. The communication device performs control so as to transmit the second radio frame on the basis of a prescribed condition.