n of relative strength of a cell. In the FDD mode, identification of timing relation between cells to support asynchronous soft handover; other measurement procedures are: preparation for HO to GSM900/1800/1900; UE procedures before random access process; and procedures for Dynamic Channel Allocation (DCA) in the TDD mode. DEDICATED AND COMMON TRANSPORT CHANNELS Transport channels are defined by how and with what features data is transferred over the air interface. The generic classification of transport channels includes two groups, i.e. dedicated and common channels. The first group uses inherent UE addressing, while the second uses explicit UE addressing when addressing is required. 4.2.1 Dedicated Transport Channels There is primarily one transport Dedicated Channel (DCH) for up- or downlink in the FDD and TDD modes, which is used to carry user or control information between the UTRAN and a UE. The DCH is transmitted over the entire cell or over only a part of the cell using, e.g. beam-forming antennas. 4.2.2 Common Transport Channels While the intrinsic function of each common transport channel may not necessarily be identical in the FDD and TDD modes, both sets have basically the same function and acronym. Table 4.3 summarizes the essential definitions for the two modes. Table 4.3 Summary of Common Transport Channels FDD mode TDD mode BCH - Broadcast Channel BCH - Broadcast Channel Downlink transport channel that is used to broadcast system- and cell-specific information. The BCH is always transmitted over the entire cell and has a single transport format. FACH - Forward Access Channel FACH - Forward Access Channel(s) Downlink transport channel used to carry control information to a mobile station when the system knows the cell location of the mobile station. In the FDD, it can be transmitted over the entire cell or over only a part of the cell using, e.g. beam-forming antennas, and it can also be transmitted using slow power control. In the TDD may carry short user packets. PCH - Paging Channel PCH - Pagin