ctor reduction and format A by all other transmission time reduction methods. Table 4.17 shows the DPCCH pilot bit patterns (order left to right), where shadowed columns define the Frame Synchronization Word (FSW) part, which can be used to confirm frame synchronization. All other non-FSW pilot bit pattern columns contain '11' for each slot. The downlink compressed-mode through 'spreading factor reduction' has double the number of bits in the TPC and pilot fields, where symbol repetition fills up the fields when necessary. In the normal mode we denote the bits in one of these fields by X1, X2, X3, ,XX, while in the compressed mode we denote the corresponding field as X1, X2, X1, X2, X3, X4, X3, X4, ,XX, Table 4.17 Pilot Bit Patterns for Downlink DPCCH with Npilot = 2, 4, 8 and 16 Npilot Npilot Npilot=8b Npilot=16c a Pattern does not apply to slot formats 2B and 3B. b Pattern does not apply to slot formats OB, 1B, 4B, 5B, 8B, and 9B. Pattern does not apply to slot formats 6B, 7B, 10B, 11B, 12B, and 13B. The UTRA Physical Layer Design For the other slot formats, symbol repetition shall be applied to the pilot bit pattern with the half size. In compressed mode through spreading factor reduction, symbol repetition is ap- plied to the symbol patterns described in Table 4.12. Table 4.18 illustrates the relationship between the TPC symbol and the transmitter power control command. Table 4.18 TPC Bit Pattern TPC Bit Pattern Transmitter power NTPC = 2 NTPC = 4 NTPC = 8 control command 11111111 00000000 4.3.8.2 Multi-Code Transmission Multi-code transmission in the downlink, i.e. the Coded Composite Transport Channel (CCTrCH) is mapped onto several parallel downlink DPCHs using the same spreading factor. As illustrated in Figure 4.17, the Layer 1 control information is transmitted only on the first downlink DPCH. DTX bits are transmitted during the corresponding time period for the additional downlink DPCHs. When there are several CCTrCHs mapped to different DPCHs transmitted to the same UE, different spreading factors can