name: FPACH
full_form: Fast Physical Access Channel
context: reported Tm parameter has a resolution of 1 chip and a range of 0 .. 38399. The Tm shall always be sent by the UE. Five different cases are discerned related to the determination of the Tm value by the UE: 1. The UE changes from common channel state to dedicated channel state: 1 RL. In this case the Tm will be zero. 2. The UE changes from common channel state to dedicated channel state: several RL's. Tm is in this case defined as being the time difference between the received PCCPCH path of the source cell and the received PCCPCH paths of the other target cells. Again the UE sets Tm to zero for the cell to which the UE sends an UL RRC message (cell #1). For cells #2 to n, the UE sets Tm to the time difference of the PCCPCH reception timing of cell#2,n from the PCCPCH reception timing of cell#1. 3. The UE adds another RL in dedicated channel state (macro-diversity). Tm is in this case defined as being the time difference between "TUETX â To" and the earliest received PCCPCH path of the
description: The Fast Physical Access Channel (FPACH) is a physical channel used for fast access in cellular networks. It is defined by the UpPCH signature (SYNC_UL) code and is set up based on the FPACH number, which is calculated using the signature number and the number of FPACHs defined in a cell. The FPACH can be set up on the secondary frequency indicated by the UARFCN IE, and its configuration and activation are controlled by the Node B.
explanation: FPACH is classified as a Channel because it is described as a physical channel used for communication in cellular networks. Its role is to facilitate fast access, and its setup, configuration, and control highlight its function within the network infrastructure.
section_title: 8.2.1.2	Successful Operation
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