Apparatus and method for allocating ovsf codes and i/q channels for reducing peak-to-average power ratio in transmitting data via enhanced up-link dedicated channels in wcdma systems

An apparatus for receiving enhanced packet data in a mobile communication system, the apparatus comprising:

• a receiver for receiving information indicating a transport channel condition from a user equipment (UE), and receiving a first enhanced dedicated physical data channel (E-DPDCH) through an in-phase (I) channel and a second E-DPDCH through a quadrature-phase (Q) channel if high speed downlink packet access (HSDPA) is set, and receiving the first E-DPDCH through the Q channel and the second E-DPDCH through the I channel if HSDPA is not set, and an enhanced dedicated physical control channel (E-DPCCH) through the I channel;
• and
• a transmitter for transmitting scheduling allocation information indicating data rate information of an enhanced dedicated physical data channel (E-DPDCH) to the UE;
• and
• a controller for controlling the transmitter and the receiver.

A method for transmitting enhanced packet data in a mobile communication system, the method comprising the steps of:

• generating a dedicated physical control channel (DPDCH) using an Orthogonal Variable Spreading Factor (OVSF) code (256,0) and a quadrature-phase (Q) channel;
• generating a dedicated physical data channel (DPDCH) using an OVSF code (SFDPDCH, SFDPDCH/4) and an in-phase (I) channel, where SFDPDCH denotes a spreading factor of the DPDCH;
• generating an E-DPCCH using an OVSF code (SFE-DPCCH, 1) and the I channel, where SFE-DPDCH denotes a spreading factor of an OVSF code to be allocated to a dedicated control channel (E-DPCCH) for supporting transmission of enhanced uplink packet data;
• and
• generating an E-DPDCH using an OVSF code (SFE-DPDCH, SFE-DPDCH/2) and the Q channel, where SFE-DPDCH denotes a spreading factor of an OVSF code to be allocated to a dedicated data channel (E-DPDCH) for supporting transmission of the enhanced uplink packet data.

An apparatus for transmitting enhanced packet data in a mobile communication system, the apparatus comprising:

• a controller for allocating an orthogonal variable spreading factor (OVSF) code (256, 0) and a quadrature-phase (Q) channel to a dedicated physical control channel (DPCCH), allocating an OVSF code (SFDPDCH, SFDPDCH/4) and an in-phase (I) channel to a dedicated physical data channel (DPDCH), where SFDPDCH denotes a spreading factor of the DPDCH, allocating an enhanced dedicated physical control channel (E-DPCCH) to an OVSF code (SFE-DPCCH, 1) and the I channel, where SFE-DPCCH denotes a spreading factor of an OVSF code to be allocated to the E-DPCCH for supporting transmission of enhanced uplink packet data, and allocating an enhanced dedicated physical data channel (E-DPDCH) to an OVSF code (SFE-DPDCH, SFE-DPDCH/2) and the Q channel, where SFE-DPDCH denotes a spreading factor of an OVSF code to be allocated to the E-DPDCH for supporting transmission of the enhanced uplink packet data;
• a spreader for spreading the E-DPDCH and the E-DPCCH according to a control signal from the controller;
• a summer for summing up the spread E-DPDCH and E-DPCCH;
• and
• a transmitter for transmitting the summed signal.

A method for receiving enhanced packet data in a mobile communication system, the method comprising the steps of:

• receiving information indicating a transport channel condition from a user equipment (UE);
• transmitting scheduling allocation information indicating data rate information of an enhanced dedicated physical data channel (E-DPDCH) to the UE;
• receiving a dedicated physical control channel (DPCCH) using an orthogonal variable spreading factor (OVSF) code (256, 0) and a quadrature-phase (Q) channel;
• receiving a dedicated physical data channel (DPDCH) using an OVSF code (SFDPDCH, SFDPDCH/4) and an in-phase (I) channel, where SFDPDCH denotes a spreading factor of the DPDCH;
• receiving an enhanced dedicated physical control channel (E-DPCCH) using an OVSF code (SFE-DPCCH, 1) and the I channel, where SFE-DPCCH denotes a spreading factor of an OVSF code to be allocated to the E-DPCCH for supporting transmission of enhanced uplink packet data;
• and
• receiving an E-DPDCH using an OVSF code (SFE-DPDCH, SFE-DPDCH/2) and the Q channel, where SFE-DPDCH denotes a spreading factor of an OVSF code to be allocated to the E-DPDCH for supporting transmission of the enhanced uplink packet data.

An apparatus for receiving enhanced packet data in a mobile communication system, the apparatus comprising:

• a receiver for receiving information indicating a transport channel condition from a user equipment (UE), receiving a dedicated physical control channel (DPCCH) using an orthogonal variable spreading factor (OVSF) code (256, 0) and a quadrature-phase (Q) channel, receiving a dedicated physical data channel (DPDCH) using an OVSF code (SFDPDCH, SFDPDCH/4) and an in-phase (I) channel, where SFDPDCH denotes a spreading factor of the DPDCH, receiving an enhanced dedicated physical control channel (E-DPCCH) using an OVSF code (SFE-DPCCH, 1) and the I channel, where SFE-DPCCH denotes a spreading factor of an OVSF code to be allocated to the E-DPCCH for supporting transmission of enhanced uplink packet data, and receiving an enhanced dedicated physical data channel (E-DPDCH) using an OVSF code (SFE-DPDCH, SFE-DPCCH/2) and the Q channel, where SFE-DPDCH denotes a spreading factor of an OVSF code to be allocated to the E-DPDCH for supporting transmission of the enhanced uplink packet data;
• a transmitter for transmitting scheduling allocation information indicating data rate information of the E-DPDCH to the UE;
• and
• a controller for controlling the receiver and the transmitter.