ess information needed to connect to the RAN. Paging Control Channel (PCCH)-used to page UEs for whom the location in the network is not known. Common Control Channel (CCCH)-used for signaling control information to and from pools of UEs, for example, including initial access-related control information, Dedicated Control Channel (DCCH)-used for signaling control information between a single UE. Dedicated Transport Channel (DTCH)-used for carrying user payload between the RAN and the UE. Uplink: Broadcast Control Channel (BCCH)-used in DL only to transmit MIB that includes basic information required by the client to detect the cell site and the SI blocks that contain more RAN-related information, including frame and radio access information needed to connect to the RAN. Paging Control Channel (PCCH)-used to page UEs for whom the location in the network is not known. Common Control Channel (CCCH)-used for signaling control information to and from pools of UEs, for example, including initial access-related control information, Dedicated Control Channel (DCCH)-used for signaling control information between a single UE. Dedicated Transport Channel (DTCH)-used for carrying user payload between the RAN and the UE. Transport channels (presented by Physical Layer to MAC) are as follows: Downlink: Shared Channel (DLSCH)-used for bulk data transfer from the gNB to the UE. Broadcast Channel (BCH)-used for transmission of parts of the BCCH SI, more specifically the so-called MIB. Paging Channel (PCH)-used for transmission of paging information. Uplink: Shared Channel (ULSCH)-used for bulk data transfer from the UE to the gNB. Random Access Channel (RACH)-used for initiating access by the UE to the gNB. Physical channels (presented by lower Physical Layer to the Upper Physical Layer) are: Downlink: Physical Downlink Control Channel (PDCCH)-main responsibilities include transmission of control information that communicates to the UEs the scheduling information for both the downlink and the uplink shared channels. 72 Open Radio