A method of wireless communication includes receiving, by a user equipment (UE) from a base station, a control message associated with a plurality of listen before talk (LBT) threshold values including a first LBT threshold value and a second LBT threshold value. The first LBT threshold value is associated with a first frequency spectrum, and the second LBT threshold value is associated with a second frequency spectrum different than the first frequency spectrum. The method further includes performing an LBT operation based on the first LBT threshold value and the second LBT threshold value. The method further includes, based on the LBT operation, performing a transmission by the UE using one or both of the first frequency spectrum or the second frequency spectrum.

The present specification relates to a method for performing uplink transmission in a wireless communication system. More specifically, a method performed by a terminal comprises the steps of: transmitting, to a base station, a plurality of PRACH preambles related to a plurality of transmission units indicating a physical layer resource set; receiving, from the base station, a plurality of random access responses (RARs) corresponding to the plurality of PRACH preambles, wherein each of the plurality of RARs comprises a temporary cell (TC)-RNTI; and transmitting, to the base station, a plurality of uplink signals on the basis of the plurality of RARs, wherein the uplink signals comprise information on overlapped TC-RNTIs.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine whether an uplink communication for a first radio access technology (RAT) has been dynamically scheduled or semi-statically configured, wherein the UE is in a dual connectivity mode using the first RAT and a second RAT. The UE may identify an uplink subframe for transmission of the uplink communication based at least in part on whether the uplink communication has been dynamically scheduled or semi-statically configured, and based at least in part on a downlink-reference uplink-downlink configuration. The UE may transmit the uplink communication in the identified uplink subframe. Numerous other aspects are provided.

A network node is configured with a common preamble format for a shared spectrum comprising a first Radio Access Technology (RAT) and a second RAT. The RACH procedure is common for the first and second RAT. The network node configures the network node with a common preamble location in time and frequency for the first and second RAT. The network node configures the UE with a preamble group comprising a number of preambles distributed between the first and second RAT for the common preamble format. When receiving from the UE, a first RACH message comprising a first preamble at the common preamble location according to the UE configuring, the network node decides whether the first RAT, the second RAT, or both the first and second RAT, shall be used for a second RACH message to be sent to the UE.

The present disclosure provide a method and terminal for counting preamble retransmission in a random access procedure. The method includes: in a random access procedure, when detecting that no Random Access Response (RAR) is received or contention resolution fails, counting a number of times of retransmission of a preamble and/or a number of times of power ramping of transmission of the preamble according to a configured counter/counters.

A system and method for signaling design and configuration are disclosed herein. In one embodiment, the system and method are configured to transmit, by a wireless communication node to a first wireless communication device, configuration information, wherein the first wireless communication device is a reduced capability user equipment device, and wherein the configuration information includes a Physical Random Access Channel configuration.

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may belong to a group of UEs and may identify a channel sensing schedule for the group of UEs. The channel sensing schedule may include sensing windows and resource reservation windows corresponding to each UE of the group of UEs. The channel sensing schedule may establish a pattern for the sensing windows and resource reservation windows such that the UEs may take turns performing sensing and resource selection. During a sensing window associated with the UE, the UE may sense a set of resources of a sidelink communication link to identify candidate resources. The UE may transmit, to the other UEs of the group, a message indicating results of the sensing, such as an indication of resource reservations, candidate resources, or the like. The other UEs may identify and select candidate resources based on the message.

A communication method and system for converging a 5.sup.th generation (5G) communication system for supporting higher data rates beyond a 4.sup.th generation (4G) system with a technology for Internet of things (IoT) are provided. The communication method and system includes intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The method includes receiving and selectively applying at least one of a first set of random access prioritization parameters, a second set of random access prioritization parameters, or a third set of random access prioritization parameters, based on whether a random access procedure is initiated for beam failure recovery or handover.

A base station according to an embodiment of the present invention may determine multiple different RA-RNTIs, and transmit message 2 for a random access response on the basis that: the base station supports not only a random access procedure of a first type terminal having a first maximum terminal bandwidth, but also a random access procedure of a second type terminal having a second maximum terminal bandwidth smaller than the first maximum terminal bandwidth; message 1 including a PRACH preamble has been detected on a PRACH resource shared between the first type terminal and the second type terminal; and at least one of PRACH preamble sequences for the first type terminal is reused for the second type terminal.

A method and a device for configuring a contention free random access resource are provided. The method includes: transmitting target resource indication information to a user equipment based on a pre-defined mapping relationship; where the target resource indication information is used to determine a physical random access channel transmission occasion (RO) resource, the target resource indication information includes at least one of a physical random access channel (PRACH) mask index or an RO resource index, and the pre-defined mapping relationship includes a correspondence between a value range of the target resource indication information and the RO resource.