Methods, systems, and devices for wireless communications are described. In some systems, radio signals may reach a receiving antenna at a user equipment by two or more paths, which can cause interference (e.g., destructive multipath interference, constructive multipath interference, etc.). To reduce the interference, the user equipment may perform interference suppression, shaping, or both based on choosing radar waveform patterns that are varied across chirps. In one aspect, the user equipment (e.g., a vehicle) may identify waveform patterns selected by nearby vehicles based on side channel or centralized signaling and may suppress or shape interference by selecting waveform parameters based on this information. In one aspect, the pattern of waveform parameters is chosen from a codebook of patterns. The selected pattern can be broadcasted to the other vehicles using a side-communication channel.

Provided are a method and an apparatus for transmitting downlink control information in a wireless communication system configured with a plurality of serving cells. The method generates downlink control information scheduling frequency division duplex (FDD) cells by means of FDD frames (DCI_FDD) and downlink control information scheduling time division duplex (TDD) cells by means of TDD frames (DCI_TDD), and transmits the DCI_FDD and the DCI_TDD, wherein parts of the fields of DCI_FDD and DCI_TDD are generated to have equal bit sizes, and if the FDD or TDD cell is used exclusively, then said parts of the fields in the FDD and TDD cells have mutually different bit sizes.

Some aspects described herein relate to configuring user equipment (UE) for performing sidelink (SL) random access (RA) procedures, which may include assistance from a base station or other network component. One or more parameters for performing a random access procedure with a second UE over a sidelink can be received from a base station. A first random access message can be transmitted to the second UE as part of the random access procedure over the sidelink. A second random access message can be received, from the second UE, in response to transmitting the first random access message, and as part of the random access procedure over the sidelink, where at least one of transmitting the first random access message or receiving the second random access message are based on the one or more parameters.

Apparatus, methods, and computer-readable media for coexistence of multiple uplink control channel formats for wireless communication with power spectral density limitation are disclosed herein. A user equipment (UE) may communicate, with a base station (BS) over a random access channel on a first set of random access resources or a second set of random access resources, a random access request based on a comparison between an intended transmit power of the random access request and a reference transmit power threshold. The UE may communicate, on a first set of uplink resources, a control message for initial network access when the random access request is communicated on the first set of random access resources. The UE also may communicate, on a second set of uplink resources, the control message when the random access request is communicated on the second set of random access resources.

Wireless extension of a wired network through the use of strand-mounted access nodes. In some aspects, private network addresses may be assigned to wireless devices, and corresponding data traffic may be routed to a centralized management/provisioning platform for further network access.

A method for transmitting an uplink signal in an unlicensed band in a wireless communication system according to an embodiment of the present invention, which is performed by a terminal, may comprises the steps of: performing channel sensing for transmitting data and a sounding reference signal in a first time interval; transmitting the sounding reference signal in a second time interval immediately following the first time interval when a channel is in a non-occupied state according to a result of the channel sensing and transmission of the sounding reference signal is scheduled; and transmitting a preliminary signal or transmitting uplink data in the second time interval immediately following the first time interval when a channel is in a non-occupied state according to a result of the channel sensing and only transmission of the uplink data is scheduled.

Provided are a wireless communication method, a terminal device, and a network device. The method includes determining, by a terminal device based on a first timer and a first counter, whether a persistent listen before talk (LBT) failure event occurs on a first resource pool. The first resource pool is a resource pool associated with a first transmission resource. The first transmission resource is a transmission resource used by the terminal device for sidelink transmission. The first timer is a timer corresponding to the first resource pool. The first counter is configured to count the number of LBT failures occurring on the first resource pool during operation of the first timer.

Uplink synchronization establishment in a base station which operates a plurality of component carriers according to one embodiment of the present description, is performed in that the base station is connected to a user equipment, sets component carrier aggregation information, generates an uplink timing groups in the set component carrier aggregation, and transmits information on the thus-generated uplink timing groups to the user equipment.

A method in a base station for controlling a Random Access, RA, procedure is provided. The base station initiates (201) an RA procedure on a Secondary Cell, SCell, in a User Equipment, UE, by sending to the UE a Physical Downlink Control Channel, PDCCH, order for a RA procedure on the SCell. At initiation of RA, the base station starts (202) a timer in the base station. The timer is a timer for random access failure detection associated with said initiated RA procedure. If the RA procedure has not been completed before expiry of said timer, the base station sends (205) a command to the UE, commanding the UE to deactivate the SCell, and thereby stopping the RA procedure on the SCell.

A wireless access network node receives, from a coordinating network node, configuration information relating to a configuration of an uplink signal comprising a given uplink sequence selected by a user equipment (UE) from a plurality of uplink sequences and to be transmitted by the UE, the configuration information to enable the wireless access network node to monitor for the uplink signal, the plurality of uplink sequences mapped to respective power levels. The wireless access network node monitors for the uplink signal according to the configuration while the wireless access network node is in an off state, and determines a power level of the uplink signal based on the given uplink sequence in the uplink signal detected by the wireless access network node.