Disclosed in various embodiments are a method for transmitting/receiving a signal in a wireless communication system, and a device supporting same. More particularly, disclosed in various embodiments are a method for transmitting/receiving a synchronization signal block (SSB) in an unlicensed band, and a device supporting same.

This communication device comprises: a control unit that sets information relating to multiband and/or multichannel communication in an extended field of a beacon signal; and a communication unit that transmits the beacon signal.

This communication device comprises: a control unit that sets information relating to multiband and/or multichannel communication in an extended field of a beacon signal; and a communication unit that transmits the beacon signal.

Proposed is a method for performing wireless communication by a first device. The method may comprise the steps of: receiving a plurality of sidelink-synchronization signal blocks (S-SSBs) from a plurality of synchronization sources, wherein each of the plurality of S-SSBs includes a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), and a physical sidelink broadcast channel (PSBCH); selecting any one of the plurality of synchronization sources on the basis of a reference signal received power (RSRP) associated with each of the plurality of S-SSBs and a sidelink synchronization signal (SLSS) ID associated with each of the plurality of S-SSBs; performing synchronization on the basis of the S-SSB associated with the selected synchronization source; and transmitting a PSCCH or PSSCH to a second device on the basis of the synchronization. For example, the SLSS ID associated with each of the plurality of S-SSBs may be a criterion for selecting any one of the plurality of synchronization sources, on the basis of the fact that a RSRP value associated with each of the plurality of S-SSBs is greater than or equal to a minimum RSRP threshold value.

The present disclosure relates to a communication method, system, base station, and terminal. The method includes: sending, by a first BS, a broadcast message, wherein the broadcast message comprising: one or more CAG IDs and one or more PLMN IDs supported by the first BS; receiving, by the first BS, a connection request sent from a terminal; establishing, by the first BS, a RRC connection with the terminal according to the connection request; receiving, by the first BS, a RRC connection setup complete message sent from the terminal, wherein the RRC connection setup complete message carries a CAG ID and a PLMN ID, which correspond to a CAG cell that the terminal selects to access; and allowing, by the first BS, the terminal to access the CAG cell that the terminal selects to access, according to the RRC connection setup complete message.

The present disclosure relates to a communication method, system, base station, and terminal. The method includes: sending, by a first BS, a broadcast message, wherein the broadcast message comprising: one or more CAG IDs and one or more PLMN IDs supported by the first BS; receiving, by the first BS, a connection request sent from a terminal; establishing, by the first BS, a RRC connection with the terminal according to the connection request; receiving, by the first BS, a RRC connection setup complete message sent from the terminal, wherein the RRC connection setup complete message carries a CAG ID and a PLMN ID, which correspond to a CAG cell that the terminal selects to access; and allowing, by the first BS, the terminal to access the CAG cell that the terminal selects to access, according to the RRC connection setup complete message.

One embodiment according to the present specification relates to a method for performing low-latency communication. A receiving STA can receive information about an access type from a transmitting STA. The receiving STA can identify a transmittable access category on the basis of information about the access type. The receiving STA can transmit data about the transmittable access category to the transmitting STA.

One embodiment according to the present specification relates to a method for performing low-latency communication. A receiving STA can receive information about an access type from a transmitting STA. The receiving STA can identify a transmittable access category on the basis of information about the access type. The receiving STA can transmit data about the transmittable access category to the transmitting STA.

A method performed by an apparatus in a wireless local area network (WLAN) is provided. The method includes: transmitting a first NDP Announcement frame for a first variant and a second NDP Announcement frame for a second variant in A-PPDU transmission, wherein the first NDP Announcement frame for the first variant and the second NDP Announcement frame for the second variant have a same time duration and are transmitted in different frequency bands; and transmitting at least one Sounding NDP for the first variant for both at least one first STA for the first variant and at least one second STA for the second variant, wherein the first variant is based on a first protocol standard and the second variant is based on a second protocol standard, and wherein the second protocol standard is beyond version of the first protocol standard.

A method performed by an apparatus in a wireless local area network (WLAN) is provided. The method includes: transmitting a first NDP Announcement frame for a first variant and a second NDP Announcement frame for a second variant in A-PPDU transmission, wherein the first NDP Announcement frame for the first variant and the second NDP Announcement frame for the second variant have a same time duration and are transmitted in different frequency bands; and transmitting at least one Sounding NDP for the first variant for both at least one first STA for the first variant and at least one second STA for the second variant, wherein the first variant is based on a first protocol standard and the second variant is based on a second protocol standard, and wherein the second protocol standard is beyond version of the first protocol standard.