Apparatus and method for transmitting TFCI used for DSCH in a W-CDMA mobile communication system

A method for determining transmission power of a second TFCI (Transmit Format Combination Indictor) bit indicating transport format information of data on a downlink shared channel transmitted from a selected Node B to a UE (User Equipment) in a mobile communication system including the UE existing in a handover region and a plurality of Node Bs in an active set indicating Node Bs capable of communicating with the UE, comprising the steps of:

• the Node Bs transmitting dedicated channel data including a first TFCI bit to the UE over dedicated channels, wherein a first Node B among the Node Bs transmits dedicated channel data including the first TFCI bit and the second TFCI bit over a dedicated channel and transmitting downlink shared channel data over the downlink shared channel;
• and
• the first Node B determining a transmission power level of the second TFCI bit to be higher than a ratio of transmission power of the dedicated channel data from a Node B transmitting only the dedicated channel data to transmission power of the first TFCI bit;
• wherein a dedicated channel frame from the first Node B has a plurality of time slots, each of the time slots including a transmission data field and a TFCI field indicating transport format information of the transmission data, each of the TFCI fields including a first field where the first TFCI bit indicating transport format information of the dedicated channel data transmitted over the dedicated channels is located and a second field where the second TFCI bit indicating transport format information of the downlink shared channel data transmitted over the dedicated shared channel is located.

A method for determining transmission power of a second TFCI (Transmit Format Combination Indictor) bit indicating transport format information of data on a downlink shared channel transmitted from a selected Node B to a UE (User Equipment) in a mobile communication system including the UE existing in a handover zone and a plurality of Node Bs in an active set indicating Node Bs capable of communicating with the UE, comprising the steps of:

• the Node Bs transmitting dedicated channel data including a first TFCI bit to the UE over dedicated channels;
• a first Node B among the Node Bs transmitting dedicated channel data including the first TFCI bit and the second TFCI bit over a dedicated channel and transmitting downlink shared channel data over the downlink shared channel;
• and
• the UE determining a power offset of the second TFCI bit by comparing a sum of dedicated channel signals received from the Node Bs with reception power of the downlink shared channel and then transmitting the power offset to the first Node B;
• wherein a dedicated channel frame from the first Node B has a plurality of time slots, each of the time slots including a transmission data field and a TFCI field indicating transport format information of the transmission data, each of the TFCI fields including a first field where the first TFCI bit indicating transport format information of the dedicated channel data transmitted over the dedicated channels is located and a second field where the second TFCI bit indicating transport format information of the downlink shared channel data transmitted over the dedicated shared channel is located.

A method for determining transmission power of a second TFCI (Transmit Format Combination Indictor) bit indicating transport format information of data on a downlink shared channel transmitted from a selected Node B to a UE (User Equipment) in a mobile communication system including the UE existing in a handover zone and a plurality of Node Bs in an active set indicating Node Bs capable of communicating with the UE, comprising the steps of:

• the Node Bs transmitting dedicated channel data including a first TFCI bit to the UE over dedicated channels;
• a first Node B among the Node Bs transmitting dedicated channel data including the first TFCI bit and the second TFCI bit over a dedicated channel and transmitting downlink shared channel data over the downlink shared channel;
• and
• a controller of the first Node B determining a power offset larger in level than transmission power of the first TFCI bit according to a number of active sets of the UE and transmitting the determined power offset to the first Node B;
• wherein a dedicated channel frame from the first Node B has a plurality of time slots, each of the time slots including a transmission data field and a TFCI field indicating transport format information of the transmission data, each of the TFCI fields including a first field where the first TFCI bit indicating transport format information of the dedicated channel data transmitted over the dedicated channels is located and a second field where the second TFCI bit indicating transport format information of the downlink shared channel data transmitted over the dedicated shared channel is located.

A method for data transmission, comprising the steps of:

• transmitting over a first channel at least a first TFCI (Transmit Format Combination Indictor) bit for indicating transport format information of a second channel by a plurality of cells;
• and
• transmitting over a third channel at least a second TFCI bit for indicating transport format information of a fourth channel by a primary cell selected among the plurality of cells;
• wherein a transmission power of the first TFCI bit is set using a first offset, and a transmission power of the second TFCI bit is set using a second offset.

A method for data transmission, comprising the steps of:

• transmitting over a DPDCH (Dedicated Physical Data Channel) and a DPCCH(Dedicated Physical Control Channel) at least a first TFCI (Transmit Format Combination Indictor) bit for indicating transport format information of the DPDCH by a plurality of cells;
• and
• transmitting over the DPDCH, a DSCH (Downlink Shared Channel) and a DPCCH including a first TFCI bit for indicating transport format information of the DPDCH and a second TFCI bit for indicating transport format information of the DSCH by a primary cell selected among the plurality of cells;
• wherein a transmission power of the first TFCI bit is set using a first offset, and a transmission power of the second TFCI bit is set using a second offset.

A method for data transmission in a communication system, comprising the steps of:

• transmitting over a first channel at least data for a UE (User Equipment) by at least one cell among a plurality of cells;
• transmitting over a second channel at least the data for the UE by the at least one cell among the plurality of cells;
• and
• transmitting over a third channel at least one of a first TFCI (Transmit Format Combination Indictor) bit for indicating transport format information of the first channel and a second TFCI bit for indicating transport format information of the second channel by the at least one cell among the plurality of cells;
• wherein a transmission power of the first TFCI bit is set using a first offset, and a transmission power of the second TFCI bit is set using a second offset.

A method for data transmission, comprising the steps of:

• selecting a cell among a plurality of cells as a primary cell by a UE (User Equipment);
• transmitting information of the primary cell to the plurality of cells;
• receiving over a first channel at least data for the UE from the primary cell;
• receiving over a second channel at least the data for the UE from the primary cell;
• and
• receiving over a third channel including at least one of a first TFCI (Transmit Format Combination Indictor) bit for indicating transport format information of the first channel and a second TFCI bit for indicating transport format information of the second channel from the primary cell;
• wherein a transmission power of the first TFCI bit is set using a first offset, and a transmission power of the second TFCI bit is set using a second offset.

A system for data transmission, comprising the steps of:

• a plurality of cells for transmitting over a first channel at least a first TFCI (Transmit Format Combination Indictor) bit for indicating transport format information of a second channel;
• a primary cell selected among the plurality of cells for transmitting a third channel including at least a second TFCI bit for indicating transport format information of a fourth channel;
• and
• a UE (User Equipment) for receiving the first channel, the second channel, the third channel, and the fourth channel, and for selecting the primary cell among the plurality of cells;
• wherein a transmission power of the first TFCI bit is set using a first offset, and a transmission power of the second TFCI bit is set using a second offset.

A system for data transmission, comprising the steps of:

• a plurality of cells for transmitting over a DPDCH (Dedicated Physical Data Channel) and a DPCCH (Dedicated Physical Control Channel);
• a primary cell for transmitting over the DPDCH, a DSCH (Downlink Shared Channel), and a DPCCH a first TFCI bit for indicating transport format information of the DPDCH and a second TFCI bit for indicating transport format information of the DSCH;
• and
• a UE (User Equipment) for receiving over the first channel, the second channel, the third channel, and the fourth channel, selecting the primary cell among the plurality of cells, and transmitting information of the primary cell to the plurality of cells;
• wherein a transmission power of the first TFCI bit is set using a first offset, and a transmission power of the second TFCI bit is set using a second offset.