A method and apparatus for HARQ feedback includes, after receiving a first random access message Msg.A sent by each of at least one terminal, a base station returning a second random access message Msg.B to the at least one terminal. The Msg.B is configured to indicate respective feedback parameters of HARQ feedback terminals in the at least one terminal, and respective HARQ feedback resources of the HARQ feedback terminals are different. The base station receives, on the respective HARQ feedback resources of retransmission terminals, HARQ feedback sent for the Msg.B by the retransmission terminals respectively.

A communication method includes receiving a first message from a first network device, and sending a second message to a terminal device. The first message includes random access related information. The second message indicates a first random access type that is usable in a random access procedure. The first random access type is a 2-step random access channel (RACH) or a 4-step RACH. The random access related information includes at least one of random access indication information useable to indicate the first random access type, random access capability information including information of a random access type supported by the terminal device, random access mode information useable to indicate a contention-based random access mode or contention-free random access mode in the random access procedure, an early downlink-data transmission indication useable to indicate to transmit a downlink data packet in the random access procedure, or a size of the downlink data packet.

A terminal is disclosed including a receiver that receives first downlink control information (DCI) indicating SRS transmission and second DCI indicating a listening condition for PUSCH transmission and a processor that, when contiguous transmissions of the SRS transmission and the PUSCH transmission are scheduled, changes the listening condition for following PUSCH transmission based on a listening result for the SRS transmission. In other aspects, a base station, a radio communication method, and a system are also disclosed.

A system can receive an indication associated with establishing a transmission control protocol (TCP) connection. The system can determine, based on the indication, information that identifies a user device associated with the TCP connection. The system can determine, based on the information that identifies the user device, a predicted congestion level of a base station associated with the TCP connection. The system can select, based on the predicted congestion level, a congestion control algorithm to be implemented for the TCP connection. The system can cause the TCP connection to be established and implement the congestion control algorithm for the TCP connection.

The present invention relates to a wireless communication terminal and a wireless communication method for a multi-user EDCA operation, and more particularly, to a wireless communication terminal and a wireless communication method for performing a combination of a legacy EDCA operation and a multi-user EDCA operation. To this end, provided are a wireless communication terminal including: a communication unit; and a processor configured to control transmission and reception of a wireless signal through the communication unit, wherein the processor updates enhanced distributed channel access (EDCA) parameters for channel access, the EDCA parameters being updated based on an EDCA parameter set selected from a first EDCA parameter set and a second EDCA parameter set, and performs channel access based on the updated EDCA parameters and a wireless communication method using the same.

A random access resource selection method and a terminal device are provided. The random access resource selection method includes: determining a first moment at which a terminal device determines that the reception of a random access response signal is unsuccessful; selecting a delay time according to a received backoff indicator BI value; and selecting a random access resource according to the first moment and the delay time.

A method for a communication protocol that includes wideband access for low latency audio. A source device and a sink device establish a wireless communication link. The protocol for communicating via the wireless communication link includes a frame having a first deterministic portion and a second opportunistic portion. The source device transmits during the first deterministic portion of the frame, first data to the sink device. The source device determines whether a predetermined condition associated with the wireless communication link is satisfied. When the predetermined condition is satisfied, the source device transmits, during the second opportunistic portion of the frame, second data to the sink device.

Disclosed are systems and devices for interfacing media access tuning circuitry that implements collision handling or traffic shaping with a reduced media independent interface (RMII). In some embodiments, an interface circuitry manages emulated signals generated by a media access tuning circuitry in response to detecting that the emulated signals would cause incorrect operation of an RMII. Also disclosed is a physical layer (PHY) device for a multidrop network. In some embodiments the PHY device implements physical layer collision techniques and operable to communicate with a media access control (MAC) device via an RMII, where the MAC is configured for carrier-sense multiple access (CSMA), CSMA with collision detection (CSMA/CD), or CSMA with collision avoidance (CSMA/CA). Also disclosed are processes for managing signaling at a PHY that implements physical layer collision avoidance (PLCA) or traffic shaping, as the case may be.

First transmission power can be determined (1110) for a first PRACH preamble in a 2-step random access procedure based on a first set of power control parameters. The first PRACH preamble can be transmitted (1120) in the 2-step random access procedure based on the first transmission power. A determination can be made (1130) to switch from the 2-step random access procedure to a 4-step random access procedure. Second transmission power can be determined (1140) based on the first set of power control parameters and a second set of power control parameters for a subsequent second PRACH preamble transmission for the 4-step random access procedure. The subsequent second PRACH preamble can be transmitted (1150) in the 4-step random access procedure based on the second transmission power.

Various techniques and approaches described herein may be applied to control congestion at a session management (SM) function (SMF) based on at least one back-off timer maintained at a user equipment (UE). In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE may be configured to establish a protocol data unit (PDU) session with a SMF. The UE may be configured to determine whether a back-off timer associated with the PDU session is terminated. The UE may refrain from sending, to the SMF, data over a control plane associated with the PDU session when the back-off timer is unterminated. The UE may send, to the SMF, the data over the control plane associated with the PDU session when the back-off timer is terminated.