TAILIEUCHUNG - Adaptive WCDMA (P17)

UMTS standard: WCDMA/FDD Layer 1 TRANSPORT CHANNELS AND PHYSICAL CHANNELS (FDD) Transport channels In the terminology used in wireless communications, ‘transport channels’ are the services offered by Layer 1 to the higher layers. The purpose of this section is to introduce basic terminology and abbreviations used in practice. For more details, see . We start with the definition of the channels. • Dedicated transport channel DCH – Dedicated Channel DCH is a downlink or uplink transport channel that is used to carry user or control information between the network and mobile station. DTCH – Dedicated Traffic Channel. SDCCH – Stand-Alone. | Adaptive WCDMA Theory And Practice. Savo G. Glisic Copyright 2003 John Wiley Sons Ltd. ISBN 0-470-84825-1 17 UMTS standard WCDMA FDD Layer 1 TRANSPORT CHANNELS AND PHYSICAL CHANNELS FDD Transport channels In the terminology used in wireless communications transport channels are the services offered by Layer 1 to the higher layers. The purpose of this section is to introduce basic terminology and abbreviations used in practice. For more details see . We start with the definition of the channels. Dedicated transport channel DCH - Dedicated Channel DCH is a downlink or uplink transport channel that is used to carry user or control information between the network and mobile station. DTCH - Dedicated Traffic Channel. SDCCH - Stand-Alone Dedicated Control Channel. ACCH - Associated Control Channel defined within ITU-R . The DCH is transmitted over the entire cell or over only a part of the cell using lobe-forming antennas. Common transport channels BCCH - Broadcast Control Channel. BCCH is a downlink transport channel that is used to broadcast system and cell-specific information. The BCCH is always transmitted over the entire cell. FACH - Forward Access Channel. FACH is a downlink transport channel that is used to carry control information to a mobile station when the system knows the location cell of the mobile station. The FACH may also carry short user packets. The FACH is transmitted over the entire cell or over only a part of the cell using lobe-forming antennas. PCH - Paging Channel. PCH is a downlink transport channel that is used to carry control information to a mobile station when the system does not know the location cell of the mobile station. The PCH is always transmitted over the entire cell. 592 UMTS STANDARD WCDMA FDD LAYER 1 RACH - Random-Access Channel. RACH is an uplink transport channel that is used to carry control information from a mobile station. The RACH may also carry short user packets. The RACH is always received

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