Abstract:
The present invention relates to a wireless communication system, and a method and apparatus for controlling channel access in a wireless LAN system. The method for controlling the channel access of a station (STA) of a wireless communication system according to the present invention comprises detecting a short frame transmitted by another STA; and deferring the channel access of the STA by a predetermined length of time. The short frame is a frame that triggers a service period during which the transceiving of a plurality of data frames of the other STA is allowed. The predetermined length of time can be set to the value corresponding to the length of time ranging from the start of the service period to the point in time at which the transceiving of a first data frame from among the plurality of data frames of the other STA is completed.
Abstract:
The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for accessing a channel in a WLAN system. A method for accessing the channel from a station (STA) in the wireless communication system, according to one embodiment of the present invention, comprises receiving from an access point (AP) setting information of a time window, which does not allow channel access of the STA in a traffic indication map (TIM) mode and which is repeatedly set in a cyclic manner; and carrying out the channel access on the basis of the time window, wherein the setting information includes starting point information of a specific time window and cycle information of the time window, wherein the time window is repeatedly set for every cycle that is indicated by the cycle information of the time window.
Abstract:
The present invention relates to a method for transmitting data units in wireless LAN systems. The method includes the steps of generating a short training field (STF) for a first channel, generating a long training field (LTF) for the first channel, duplicating the STF on at least one second channel, duplicating the LTF on at least one second channel, transmitting the STF and the one or more duplicated STFs through a transmission channel, transmitting the LTF and the one or more duplicated LTFs through the transmission channel, and transmitting a data field through the transmission channel.
Abstract:
An apparatus and method for transmitting and receiving persistent scheduling information are provided. A machine-to-machine (M2M) device for receiving persistent scheduling information in a wireless communication system includes a receiver configured to receive, from a BS, a message comprising allocation period information including a persistent allocation period for the M2M device, wherein the message further comprises de-allocation information that indicates whether the de-allocation corresponds to a permanent de-allocation or one-time de-allocation when the allocation period information indicates a de-allocation, and wherein the message does not comprise information about HARQ feedback allocation when the de-allocation information indicates the one-time de-allocation.
Abstract:
According to various embodiments, a multi-link device including a first STA and a second STA may receive, via the first STA, at least one PPDU within a transmission opportunity (TXOP) configured in a first link. While the at least one PPDU is received, the state of the second STA may be set to a doze state. The multi-link device may receive, via the first STA, a first control frame for the truncation of the TXOP. The multi-link device may change the state of the second STA from the doze state to an awake state on the basis of the first control frame.
Abstract:
According to various embodiments, a multi-link device including a first STA and a second STA may receive a first PPDU by means of the first STA. The PPDU may include information about traffic buffered in the second STA operating in a second link. In response to the first PPDU, the multi-link device may change the second STA from a doze state to an awake state, and transmit information about the state of the second STA by means of the second STA.
Abstract:
In a wireless local area network (LAN) system, an STA of a multi-link device (MLD) may transmit MAC addresses of other STAs included in the same MLD as the STA in a link setup step. The MAC addresses of other STAs may be included multi-link address information. The multi-link address information may be included in a Multi-link Element defined in a conventional Management frame such as a Beacon Frame, a Probe Response Frame, an Association Request Frame, and an Association Response Frame.
Abstract:
According to various embodiments, a multi-link device (MLD) operating in a plurality of links including a first link can transmit a request frame to a first AP of an AP MLD through a first STA (station), wherein the request frame includes an information field for requesting every element included in an element set designated for a second link. The MLD can, on the basis of the request frame, receive every element included in the element set designated for the second link.
Abstract:
A transmitting multi-link device (MLD) in a wireless local area network system enables a first station (STA) to perform a back-off operation again without transmitting PPDU, if a second STA is in the middle of receiving even when a back-off counter (BC) of the first STA becomes 0. The first STA and the second STA are included in the same transmitting MLD. The first STA operates on a first link and the second STA operates on a second link. The first and second links are included in a non-simultaneous transmit and receive (NSTR) link pair.
Abstract:
In a wireless local area network (LAN) system, a transmitting station (STA) may transmit a peer-to-peer (P2P) transmission request frame to an access point (AP). The transmitting STA may receive a P2P transmission response frame from the AP. The transmitting STA may receive a trigger frame from the AP. The trigger frame may include information related to whether same is for an uplink, P2P transmission or both an uplink and P2P transmission. The transmitting STA may transmit data to a receiving STA. The transmitting STA and the receiving STA may be non-AP STAs. The transmitting STA may transmit a null data packet announcement (NDPA) frame and a null data packet (NDP) frame to the receiving STA. The transmitting STA may receive, from the receiving STA, a feedback frame including state information for the channel between the transmitting STA and the receiving STA.