According to one embodiment, a wireless communication device includes: a receiver that configured to receives a first frame; and a transmitter that configured to transmits a second frame including a first identifier and acknowledgement information on the first frame, the first identifier being extracted from a predetermined field of the first frame and being different from a source address of the first frame.

Wireless communication device

Disclosed are a method and an apparatus for receiving a frame. A method for receiving a frame in a wireless LAN comprises the steps of: an AP transmitting, to a plurality of STAs, a downlink PPDU including downlink data for each of the plurality of STAs, through a plurality of channels; and the AP receiving, from each of the plurality of STAs, a plurality of block ACK frames transmitted based on a block ACK transmission control field, wherein the downlink PPDU includes the block ACK transmission control field, and wherein each of the plurality of block ACK frames may include ACK information related to downlink data.

Method and apparatus for receiving frame

Provided is an access method comprising: transmitting a first frame carrying uplink transmission demand information to an access point; if a second frame carrying information about an uplink transmission resource is received from the access point within an appointed time, transmitting uplink multi-user transmission data to the access point, wherein the uplink multi-user transmission data is transmitted on the uplink transmission resource; and if the second frame is not received within the appointed time, a station accessing a channel in a contention access way based on carrier listening CSMA/CA. By means of the method provided in the embodiment of the present invention, the channel access can be managed, thereby reducing the degree of congestion of a system and improving channel utilization.

Access method and apparatus

An access point (AP) may prioritize the allocation of uplink resources between multiple basic service sets (BSSs). In some aspects, the AP may select one of a plurality of BSSs, may allocate one or more random resource units (RUs) to only the selected BSS, and may transmit a frame indicating the allocation of the one or more random RUs to the selected BSS. Wireless devices belonging to the selected BSS may contend for access to the random RUs allocated by the frame, and then transmit uplink data using the random RUs.

Random access resource unit allocation for a multiple BSSID network

Embodiments of a station (STA), access point (AP) and method for aggregation of data packets are generally described herein. The AP may transmit a trigger frame (TF) to an STA that indicates an access class (AC) constraint parameter and a traffic identifier (TID) aggregation limit parameter. The STA may select a group of aggregate TIDs from which medium access control (MAC) protocol data units (MPDUs) may be aggregated into an aggregated MPDU (A-MPDU). The AC constraint parameter may indicate a recommended AC from which at least a portion of the aggregate TIDs are to be selected. The TID aggregation limit parameter may indicate a number of TIDs to be selected for the group of aggregate TIDs.

Station (STA), access point (AP) and method for aggregation of data packets for uplink transmission

A transmitting node obtains a plurality of frames including first-type frames associated with an acknowledgment policy requiring acknowledgment and second-type frames associated with an acknowledgment policy requiring no acknowledgment. The transmitting node aggregates the frames of the obtained plurality of frames into an aggregated frame 450 including at least one leading frame of second type and frames subsequent thereto, in an order depending on their associated acknowledgment policies. The transmitting node then sends the aggregated frame to a receiving node and sends a block acknowledgment request (BAR) frame 410 to the receiving node to request it to acknowledge 420 receipt of only subsequent frames of the aggregated frame. May be used in Mac Service Data Unit (MSDU) Aggregation (A-MSDU) and Message Protocol Data Unit (MPDU) aggregation (A-MPDU) schemes with block ACK. Improves bandwidth usage and reduces head-of-line blocking, and thus latency.

Method and device for data communication in a communication network

In an 802.11ax network with an access point, a trigger frame offers random resource units to nodes for data uplink communication to the access point. To dynamically adapt the contention mechanism used by the nodes to access the random resource units, the AP updates a correcting TBD parameter at each new TXOP and includes the updated adjusting parameter in the trigger frame for the next TXOP. The nodes use the TBD parameter to generate a local random RU backoff value from a contention window range, for contending for access to the random resource units. The TBD parameter may directly impact the contention window size CWO or boundaries values of a selection range from which CWO is selected.

Improved contention mechanism for access to random resource units in an 802.11 channel

The invention relates to wireless network comprising an access point and non-AP stations. The station has traffic queues and associated a backoff counters which are decremented over time upon continuously sensing the medium as free during more than respective AIFS durations. To compensate additional opportunities provided by OFDMA RUs, a queue switches to an MU mode upon transmitting its data in an RU provided by the AP. To restore dynamicity of the backoff counters, frozen in the MU mode in the known techniques, embodiments provide the following at each expiry of one of the queue backoff counters: the current mode of the expiring traffic queue is determined; in case of legacy mode, the station accesses the channel to transmit data from the queue; whereas in case of MU mode, a new backoff value is drawn to reset the expiring backoff counter, without having data from the queue being transmitted.

QoS management for multi-user EDCA transmission mode in 802.11ax networks

The invention relates to improve use of resource units in MU transmissions of an 802.1 1ax network. An un-associated station may receive data frames over a downlink resource unit, RU, assigned to an AID, e.g. 2045, reserved for stations not associated with the AP, The AP may use a downlink RU sharing an allocation scheme feature of an uplink RU previously used by the un-associated station. The AP may also aggregated data frames addressed to several stations within the same downlink RU, for instance to acknowledge frames previously received from the stations. The aggregated data frames may signal which respective response RUs the addressee stations should use for a next multi-user uplink transmission to respond to the AP. These approaches particularly applies to the exchange of management frames for instance to speed up the association procedure of un-associated stations.

Resource units for unassociated stations and grouped multi-user transmissions in 802.11ax networks

An Access Point AP sends a trigger frame triggering a Multi-User MU transmission made of Resource Units RUs (in an IEEE 802.11ax wireless network). The trigger frame allocates one random resource unit to a specific group of stations by specifying the corresponding Basic Service Set Identifier BSSID or BSS index in an AID12 subfield associated, within the trigger frame, with the random resource unit. The stations of this group thus contend for access to this specific random RU and can then send, over the random resource unit, a data frame. The first data frame includes a receiver address, RA, subfield set to the BSSID of the first group to allow the AP to efficiently process it. Responsive to receiving the data frame, the AP sends an acknowledgment frame. The latter includes a transmitter address, TA, subfield set to the BSSID of the specific group, thereby allowing the transmitting station to efficiently check whether the data frame has been correctly received. Each group may be managed by a virtual access point VAP implemented in the physical access point.

Viger Pascal

Papers

Method and device for data communication in a communication network

Improved contention mechanism for access to random resource units in an 802.11 channel

QoS management for multi-user EDCA transmission mode in 802.11ax networks

Resource units for unassociated stations and grouped multi-user transmissions in 802.11ax networks

Improved access to random resource units by a plurality of BSSs