name: CPCH
full_form: Common Packet Channel
context: for 1.28Mcps TDD UE Side Figure -2 (informative): RACH transmission control procedure for FDD UE Side 2) Control of CPCH transmissions (FDD mode) The MAC layer controls the timing of CPCH transmissions on transmission time interval level (i.e. on 10 ms, 20 ms, 40 ms or 80 ms level); the timing on access slot level is controlled by L1. MAC controls the timing of each initial preamble ramping cycle as well as successive preamble ramping cycles. Note that retransmissions in case of erroneously received CPCH message part are under control of higher layers. Figure -3 procedure is used for access to CPCH channel. Figure 4.3.5-4 procedure is used for CPCH Message transmission on the CPCH channel obtained using the access procedure. Figure -3: CPCH transmission control procedure for access (informative) Figure -4: CPCH transmission control procedure for CPCH Message Transmission (informative) 3) Transport format combination selection in UE RRC can control the scheduling of uplink data by
description: The Common Packet Channel (CPCH) is a type of connection used for transmitting packet data in telecommunications networks. It is controlled by the MAC layer, which manages the timing of CPCH transmissions on transmission time interval level.
explanation: CPCH is classified as a Connection because it establishes a pathway for data transfer between devices within a network, similar to other types of connections.
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