A first next-generation
radio access network (NG-RAN) and its
wireless communication method are provided. The method of the first next-generation
radio access network (NG-RAN) includes: the first NG-RAN performing non-
public network (NPN)
cell identification at the access layer (AS) level for downlink (DL), wherein the first NG-RAN performing NPN
cell identification at the AS level for DL includes at least one of the following: wherein the NPN
cell can transmit a synchronization sequence for NPN in one or more
synchronization signal blocks (SSBs) on the initial bandwidth portion (BWP), wherein an NPN identifier (ID) is present in NPN access-related information elements (IEs) in
broadcast system information about the DL BWP, wherein the DL BWP for NPN is used to transmit SSBs and related
system information, or wherein access level permission is transmitted in the
system information on the DL BWP for NPN access permission.