Disclosed are method for transmitting and receiving frame in wireless local area network and apparatus for the same. A communication method performed in a first station, the communication method comprises receiving, through a channel from an access point, a first frame notifying a first period for transmission or reception of a frame; and processing the first frame, wherein a second period exists between the first frame and the first period, and wherein the second period is a contention period during which stations are allowed to contend for the channel. Therefore, performance of WLAN can be enhanced.

Systems, apparatus and methods for wireless local area network (WLAN) communication which support real-time application (RTA) packets. The access point (AP) schedules multiple-user (MU) multiple-input-multiple-output (MIMO) transmissions for uplink (UL) or downlink (DL) for RTA packets by allocating resources to packet transmissions before RTA packet arrival. The AP contends for channel access before the expected time of arrival of the RTA packet in the DL or UL direction. The operations reduce RTA packet latency on the WLAN.

Systems, apparatus and methods for wireless local area network (WLAN) communication which support real-time application (RTA) packets. The access point (AP) schedules multiple-user (MU) multiple-input-multiple-output (MIMO) transmissions for uplink (UL) or downlink (DL) for RTA packets by allocating resources to packet transmissions before RTA packet arrival. The AP contends for channel access before the expected time of arrival of the RTA packet in the DL or UL direction. The operations reduce RTA packet latency on the WLAN.

The present disclosure provides a random access method and a terminal device. The method includes: reserving a first MAC PDU buffered in a HARQ buffer or buffering a second MAC PDU in a HARQ buffer if a random access procedure is successful, where the first MAC PDU is a PDU that is buffered in a Msg3 buffer in a contention random access procedure, the second MAC PDU is a PDU that includes at least data content of the first MAC PDU and is buffered in a target buffer, and the target buffer and the Msg3 buffer are different buffers.

The present disclosure provides a random access method and a terminal device. The method includes: reserving a first MAC PDU buffered in a HARQ buffer or buffering a second MAC PDU in a HARQ buffer if a random access procedure is successful, where the first MAC PDU is a PDU that is buffered in a Msg3 buffer in a contention random access procedure, the second MAC PDU is a PDU that includes at least data content of the first MAC PDU and is buffered in a target buffer, and the target buffer and the Msg3 buffer are different buffers.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a discovery reference signal from a base station on an anchor channel. The UE may perform a first random or pseudorandom frequency hopping procedure to identify a plurality of downlink carriers for a first time period. The UE may perform a second random or pseudorandom frequency hopping procedure within the plurality of downlink carriers to select one of the plurality of downlink carriers as the uplink channel for a second time period. The UE may then transmit an uplink communication during the second time period on the selected uplink channel. In some examples, the uplink communication may be transmitted based at least in part on time division multiplexing (TDM) information.

Conditional handover (CHO) configurations may include random access channel (RACH) configuration information (e.g., beam quality thresholds, beam quality threshold offsets, one or more beams associated with configured contention free random access (CFRA) resources, one or more beams associated with configured contention based random access (CBRA) resources, or some combination thereof). A user equipment (UE) may, upon detection that a handover condition in a CHO configuration has been satisfied, select a target cell beam for transmission of a random access request based on the RACH configuration information included in the CHO configuration. In various examples, the selected beam may correspond to a highest quality beam with a highest quality beam measurement value above the beam quality threshold, a beam with an earliest configured CFRA resource or an earliest configured CBRA resource (e.g., if a corresponding beam measurement at least falls within the beam quality threshold offset), etc.

According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first frame including first information required for uplink multi-user transmission without receiving a transmission request for the first information; and a receiver configured to receive a second frame.

According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first frame including first information required for uplink multi-user transmission without receiving a transmission request for the first information; and a receiver configured to receive a second frame.

Embodiments of systems and methods for operating wireless communication devices (e.g., User Equipments (UEs)) as initiating and responding devices in a Frame-Based Equipment (FBE) New Radio (NR) Unlicensed (NR-U) network are disclosed. The proposed methods allow operating the NR-U network as an FBE system in a flexible manner that supports a wide range of deployments not limited to the UE operating as a responding device. In some embodiments, methods to operate UEs as initiating and responding devices in a FBE-based NR-U network are disclosed.