A channel access method, a terminal device, and a network device are provided. The method includes: monitoring a request to send-downlink control channel according to first configuration information of the request to send-downlink control channel; and determining, according to a monitoring result from monitoring the request to send-downlink control channel, whether to perform channel access.

Embodiments of this application provide a communication method and a communication apparatus. According to the method, a terminal device receives configuration information from a network device. The terminal device determines, in a first parameter set based on the configuration information, a parameter corresponding to a random access preamble. The terminal sends the random access preamble to the network device based on the parameter corresponding to the random access preamble and the configuration information.

A transmission acknowledgment method, a terminal device, and a transmission node are provided. The transmission acknowledgment method is performed by a first terminal. The method includes: monitoring a first physical control channel based on monitoring configuration information of the first physical control channel; obtaining first control information transmitted by a transmission node on the first physical control channel, where the first control information includes RTS information for a plurality of target terminal devices, and the plurality of target terminal devices include the first terminal; and sending CTS information on a second physical control channel based on the RTS information.

The technology of this application relates to a random access method, applied to the communication field. The method includes a terminal device sends, to a network device, a first message used to establish a wireless connection, the terminal device receives, a connection response sent by the network device, where the connection response includes information about a first polarization parameter, and when accessing the network device based on the connection response, the terminal device determines, based on the information about the first polarization parameter included in the connection response, whether the terminal device is qualified to access the network device. A dimension, namely, a polarization parameter, is introduced into a random access procedure, so that a preamble capacity is increased, a problem that the network device cannot identify a colliding terminal device is alleviated, and efficiency of establishing a communication connection between the terminal device and the network device is improved.

Provided are an initial access method, a controlled device and a controlling device, which can realize initial access in short-range communication without depending on a PRACH preamble. The initial access method comprises: a controlled device acquiring an initial access resource; the controlled device sending, on the initial access resource, initial access information to a controlling device; and the controlled device monitoring access feedback information sent by the controlling device, wherein the access feedback information is used for indicating that the controlled device has successfully accessed the controlling device.

Methods, systems, and devices for wireless communications are described. A base station may determine to operate in accordance with an energy saving mode in which the base station only transmits remaining minimum system information (RMSI) on-demand or reduces transmission of RMSI with respect to when the base station is operating outside of the energy saving mode. A user equipment (UE) may detect the base station that is operating in an energy saving mode. The UE may transmit a request for the base station to transmit the RMSI to the UE, where the UE may transmit the request to the energy saving base station or to a serving base station of the UE. The UE may receive, from the base station operating in the energy saving mode and responsive to the request, a message including the remaining minimum system information.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating at least one of: a configuration for requesting repetition for an uplink shared channel transmitted after receiving a contention-free random access (CFRA) message, or a configuration for dropping one or more repetitions of the uplink shared channel. The UE may request the repetition for the uplink shared channel if the configuration information indicates the configuration for requesting repetition. The UE may transmit the uplink shared channel based at least in part on the configuration information. Numerous other aspects are described.

This disclosure provides systems, methods and apparatus for a signaling mechanism associated with activating a secondary cell (SCell) for uplink control information (UCI), including under circumstances in which the SCell is deactivated and belongs to a timing advance group (TAG) lacking a valid timing advance (TA) value. In one aspect, a user equipment (UE) and one or more components of a network entity may employ a signaling mechanism for establishing an SCell as a PUCCH-SCell in scenarios in which the PUCCH-SCell belongs to a secondary TAG (sTAG) lacking a valid TA value. The signaling mechanism may include signaling to directly provide the network entity with beam measurement information associated with one or more SCells of the sTAG or may include singling that the network entity may use to derive the beam measurement information associated with the one or more SCells of the sTAG.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive first information indicating a first set of parameters associated with repetition of a second random access message (RAM) associated with a random access channel (RACH) procedure. The UE may transmit, using the first set of parameters, an initial RAM in association with the RACH procedure. Numerous other aspects are described.

According to an embodiment of the present disclosure, a user equipment (UE) may receive downlink control information (DCI) in a first fixed frame period (FFP) for frame based equipment (FBE) from a base station (BS), and perform a channel access procedure for a scheduled uplink (UL) transmission based on the DCI. In a first state in which it is indicated that the scheduled UL transmission is related to channel occupancy initiated by the BS, and the UE should perform channel sensing for the scheduled UL transmission, the UE may perform the channel access procedure for the scheduled UL transmission based on whether a resource for the scheduled UL transmission allocated by the DCI is confined within the first FFP in which the DCI is received.