KR100547720B1 - Reverse transmission power control apparatus and method in code division multiple access mobile communication system - Google Patents

Abstract

The present invention relates to an apparatus and method for reverse power control in a mobile communication system using a channel for forward high-speed packet data service, particularly among a code division multiple access mobile communication system. In addition, the present invention proposes an apparatus and method for enabling a base station to reliably interpret a reverse control channel for a forward fast packet data service. An advantage of the scheme proposed by the present invention is that the control channel for the forward fast packet data service and the power control for the other channels can be performed together.

CDMA, HSDSCH, DPDCH, P-DPCCH, S-DSCCH, TTI, UP-LINK, Power Control

Description

TECHNICAL FIELD AND METHOD AND APPARATUS FOR TRANSMISSION POWER CONTROL FOR USER EQUIPMENT IN CDMA MOBILE COMMUNICATION SYSTEM}

1 is a diagram illustrating a forward and reverse channel relationship between a plurality of cells and a mobile terminal when a mobile terminal is located in a cell overlap region in a conventional code division multiple access mobile communication system.

2A to 2C are diagrams illustrating the structure of a forward channel in a code division multiple access mobile communication system supporting a conventional fast forward packet access scheme.

3A to 3B are diagrams illustrating a structure of a reverse channel in a code division multiple access mobile communication system supporting a conventional fast forward packet access scheme.

4 is a diagram illustrating an example of an apparatus for transmitting a base station according to an exemplary embodiment of the present invention.

5 is a diagram illustrating an example of a receiving apparatus of a base station according to an exemplary embodiment of the present invention.

6 is a diagram illustrating an example of an apparatus for transmitting a mobile terminal according to an exemplary embodiment of the present invention.

7 is a view showing an example of a receiver of a mobile terminal according to an embodiment of the present invention.

8A through 8D illustrate examples of a reverse channel structure according to an embodiment of the present invention.

9 is a diagram illustrating a control flow performed by a base station according to one embodiment of the present invention.

10 is a view showing a control flow performed by a mobile terminal according to an embodiment of the present invention.

11 illustrates examples of a reverse channel structure according to another embodiment of the present invention.

12 illustrates another example of an apparatus for transmitting a mobile terminal according to an embodiment of the present invention.

13 is a view showing another example of a receiving apparatus of a base station according to an embodiment of the present invention.

14 is a view showing a control flow performed by a mobile terminal according to another embodiment of the present invention.

15 is a view showing a control flow performed by a mobile terminal according to another embodiment of the present invention.

The present invention relates to an apparatus and method for controlling reverse transmission power of a code division multiple access communication system, and more particularly, to an apparatus and method for power control of a reverse dedicated physical channel.

In general, HSDPA (High Speed Down Link Packet Accees) is referred to as a High Speed Downlink Shared Channel (HS-DSCH) for supporting high speed forward packet transmission in a third generation asynchronous mobile communication system. The related control channels and data channels are collectively referred to. Three new technologies have been introduced in the HSDPA to support forward high speed packet transmission. First, Adaptive Modulation and Coding (hereinafter referred to as AMC) is applied to a channel state between a base station or a cell and a terminal or user equipment (hereinafter referred to as UE). Accordingly, the modulation scheme and the coding scheme of the forward data channel are determined to enable high-speed packet transmission to the UE, thereby increasing the data rate of the entire cell. The combination of the modulation scheme and the coding scheme is called a modulation and coding scheme (hereinafter referred to as MCS), and a plurality of MCSs can be defined from level 1 to level n. The AMC refers to a method of adaptively determining a level of the MCS according to a channel state between a user and a cell, thereby increasing overall data transmission efficiency.

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Secondly, a new technique used for HSDPA is described as n-channel Stop And Wait Hybrid Automatic Retransmission Request (hereinafter referred to as n-channel SAW HARQ).

In the conventional automatic retransmission scheme, an acknowledgment (ACK) and a retransmission packet are exchanged by signaling an upper layer between a UE and a base station controller (referred to in 3GPP as a radio network controller_radio netwrok controller (RNC)). However, in HSDPA, some of the functions of medium access control (hereinafter referred to as MAC) in the conventional RNC are moved to the base station (called node B in 3GPP) and MAC HS- of n UEs and the base station. The ACK and the retransmission packet are exchanged through the physical channel between the DSCHs.Some of the MAC functions transferred to the base station are called MAC-HSDSCH.

Also, by configuring n logical channels, it is possible to transmit several packets without receiving ACK. This will be described below. In traditional Stop and Wait ARQ schemes, an acknowledgment (hereinafter referred to as ACK) or a negative acknowledgment (No Acknowledgment) for a packet is received after one packet transmission. After that, it was possible to send another packet or retransmit the packet. The conventional stop-standby automatic retransmission scheme is simple to operate, and although a terminal or a base station can transmit a packet, there is a disadvantage in that a case of waiting for a response of an ACK or a NACK may occur. In n-channel SAW HARQ used in HSDPA, by setting n logical channels between a UE and a base station and identifying the channels by a specific time or an explicit channel number, the receiving UE is responsible for the packet received by the UE. In addition to transmitting an ACK or NACK, it is possible to receive other packets from a base station or a cell. The UE can know which channel the packet received at any point in time by prior appointment with the base station or cell, and reconstruct the packets in the order transmitted by the base station or cell after reception.

Lastly, a fast cell selection (hereinafter referred to as FCS) which is a technology introduced will be described. When a UE receiving HSDPA enters a soft handover region, it selects a cell or base station that maintains the best channel state, receives a packet only from the cell or base station, and provides a high data rate. This is a technique for reducing overall interference by combining a transmitting base station or a cell of HSDSCH.

In order to apply the techniques introduced in the HSDPA as described above, the following new control signals are exchanged between the UE and the base station (or cell). The information to be transmitted from the base station (or cell) to the UE includes information on channel codes on which the HS-DSCH is transmitted, the MCS level used for the HS-DSCH, and the HS-DSCH after the reception of the HS-DSCH. Information related to decoding, such as code unit information, information about packets transmitted by the HS-DSCH, and the like, must be transmitted. The information about the channel codes is information required as the HS-DSCH basically uses a multi code transmission scheme for high speed transmission. In addition, the information on the packets may be HARQ information related to which channel of the received packet is which packet, initial transmission or retransmission. The information to be transmitted from the UE to the base station (or cell) includes ACK or NACK information on the received packets, and measurement information on channel conditions between the UE and the base station (or cell) for supporting AMC and FCS. In addition, when the cell having the best channel condition is changed in the FCS, the UE transmits the information to the base station (or cell) so that the optimal cell can correctly transmit the HS-DSCH to the UE.

 1 is a diagram illustrating a forward and a reverse channel relationship between a plurality of cells and a UE when the UE is located in a cell overlap region. In FIG. 1, the number of cells in the cell overlapping region is limited to two for convenience of description. However, even when the number of cells in the cell overlapping region is two or more, the problem described in the description of FIG. 1 may occur.

Referring to FIG. 1, cell # 1 101 is a cell for transmitting the HS-DSCH to the UE 111 and is called a primary cell. Downlink dedicated physical channels (hereinafter, referred to as DL DPCHs) and high speed physical downlink shared channels (hereinafter referred to as DL DPCHs) as the forward channels between the cell # 1 101 and the UE 111. HS-PDSCH) is transmitted, and as the reverse channel, a first reverse dedicated physical channel (hereinafter referred to as P_UL DPCH) and a second reverse dedicated physical control channel (hereinafter referred to as S_UL_DPCCH) Is called). Cell # 2 103 is a cell that transmits a DL DPCH to the UE 111 as a neighbor cell of the cell # 1 101 and receives a UL DPCCH.

2A to 2C are diagrams illustrating the structure of the forward channels in FIG. 1, and FIGS. 3A and 3B are diagrams illustrating the structures of the reverse channels in FIG.

FIG. 2A illustrates a structure of an HS-PDSCH transmitted by the cell # 1 101 of FIG. 1 to the UE 111. The HS_PDSCH is transmitted based on three time slots having a length of 0.67 ms, and the transmission rate is determined by the MCS level used and how many channel codes are used. The channel code is a channel used for distinguishing different up / down channels in an asynchronous mobile communication system and has a length defined from 4 to 512. The length of each channel code means the spread rate of data.

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FIG. 2B is a diagram illustrating the structure of the DL_DPCH transmitted from the cell # 1 101 and the cell # 2 103 of FIG. 1 to the UE 111. The DL_DPCH is composed of a downlink dedicated physical data channel (hereinafter, referred to as DL_DPDCH) and a reverse dedicated physical control channel (hereinafter, referred to as DL_DPCCH). In the structure of the DL_DPCH, user data such as higher layer signaling or voice data is transmitted through the first data area 212 and the second data area 215 corresponding to the DL_DPDCH. In the structure of the DL_DPCH, the DL_DPCCH has a TPC (Transmit Power Control Command) field 213, a Transmitted Format Combination Indicator (TFCI) field 214, and a pilot field. (216). The TPC field 213 is a field for transmitting a power control command for power control of a reverse transport channel from the UE to the cell. The TFCI is information required for transmission rates, channel configuration types, and channel decoding of the first data area 212 and the second data 215. The pilot field 216 is a field used by the UE to estimate a downlink transmission channel environment from the cell to the UE. From the first data area 212 to the pilot field 216 is composed of one time slot having a length of 2560 chips, and 15 times slots form one radio frame having a length of 10 ms. The radio frame is the most basic physical transmission unit used in 3GPP, an asynchronous standard. The DL_DPCH is a channel that all cells (or base stations) in the cell overlap region transmit to the UE when the UE is located in the cell overlap region. For example, the channel of FIG. 1 is a channel transmitted from the cell # 1 101 and the cell # 3 103 to the UE 111.

2C is a diagram illustrating a structure of a highspeed shared control channel (hereinafter referred to as HS-SCCH). The HS-SCCH is a channel for transmitting control information required for reception of the HS_DSCH transmitted from the cell # 1 101 to the UE 111, and is alternately received by UEs in the corresponding base station (or cell) serving the HSDPA service. It is a shared channel. The HS-SCCH may transmit control information necessary for reception of the HS-DSCH to one UE or a plurality of UEs at any time. The HS-SCCH has three time slots 221 as a basic unit, and during the three time slots 221, a transmitted format resource indicator (hereinafter referred to as TFRI) 223 and HARQ. Send information 225. The TFRI 223 contains the MCS level used for the HS_DSCH, the number and type of channel codes, and information necessary for decoding the HS-DSCH. The HARQ information 225 indicates the number of channels to be transmitted in the HSDPA using the n-channel STW HARQ scheme and whether the packet to be transmitted through the HS_PDSCH is an initial transmission packet or a packet that is retransmitted due to an error. Indicates whether or not. The HS-SCCH is a channel transmitted only to the UE receiving the HSDPA from the cell transmitting the HSDPA, and is a channel only received from the cell transmitting the HSDPA even if the UE is located in a cell overlap region. Referring to FIG. 1, only cell # 1 101 transmitting the HS_DSCH transmits the HS-SCCH to the UE 111.

3A to 3B are diagrams illustrating structures of reverse channels corresponding to forward channels shown in FIGS. 2A to 2C. 3A is an uplink dedicated physical channel (hereinafter, referred to as UL_DPCH), and an uplink dedicated physical data channel (hereinafter, referred to as UL_DPDCH) and an uplink dedicated physical control channel (uplink dedicated physical control channel). Channel: hereafter referred to as UL_DPCCH). The UL_DPDCH is a channel through which reverse control information or user information is transmitted from the UE to at least one cell, and the UL_DPCCH is a channel through which physical control information is transmitted. The function of each field is basically the same as the DL_DPCCH described above. The UL_DPCCH and UL_DPDCH are channel coded through different channel codes, and are transmitted through I and Q channels of Quadrature Phase Shift Keying (QPSK). The basic transmission unit of the UL_DPCH is a 10 ms radio frame, and the 10 ms radio frame consists of 15 timeslots. The timeslot consists of a pilot field 312, a TFCI field 313, an FBI field 314, and a TPC field 315. The pilot field 312 serves to allow at least one cell receiving the UL_DPCH to estimate the reverse channel environment from the UE to the cell. The TFCI field 313 is a channel for transmitting the transmission combination type indicator of the UL_DPDCH, and indicates a channel code and transmission rate used for the UL_DPDCH, information necessary for decoding, or a type of data transmitted through the UL_DPDCH. The fed back information (FBI) field 314 transmits control information for the closed-loop antenna scheme when the forward transmission scheme uses the closed-loop antenna scheme. In addition, when the UE located in the cell overlap region uses a Site Selection Diversity Transmission (hereinafter referred to as SSDT) for receiving UL_DPDCH only from one base station having a good forward channel environment, supporting the SSDT. This field is used to transmit control information. The SSDT is a technology newly developed in the HSDPA by being developed with a function called FCS. The TPC field 315 is a channel for transmitting a power control command for controlling the transmission power of the forward channels from the base station or cell. The UL-DPCH shown in FIG. 3A is a channel that all cells in the cell overlap region receive when the UE exists in the cell overlap region. Referring to FIG. 1 as an example, both the cell # 1 101 and the cell # 2 103 receive the UL_DPCH transmitted by the UE 111.

S-UL_DPCCH shown in FIG. 3B is a channel for transmitting control information from a UE using HSDPA. As described above, the UE using the HSDPA may transmit channel measurement information for selecting an MCS level or an optimal cell together with ACK or NACK information on a packet received by a base station or a cell transmitting the HSDPA. The above information is transmitted through the S-UL_DPCCH, and only ACK / NACK information 323 may be transmitted during one time slot or three timeslots. Measurement report information 325 may also be transmitted during one or three timeslots. The ACK or NACK information and the measurement report information are information that can be transmitted only when the UE needs to transmit, and when the UE does not need to transmit, the ACK or NACK information and measurement report information are generally processed by DTX (Discontinuous Transmission). The use of the S-UL_DPCCH is for compatibility with 3GPP communication systems that do not support the conventional HSDPA by introducing a new channel without touching the structure of the conventional UL_DPCH according to the introduction of the HSDPA service. The S_UL_DPCCH is a channel transmitted only to a cell transmitting HSDPA, and is transmitted only to a cell (or base station) transmitting HSDPA even if the UE is located in a cell overlap region. Referring to FIG. 1 as an example, the UE 111 transmits S_UL_DPCCH only to cell # 1 101 and does not transmit to cell # 2 103.

2A to 2C and 3A to 3B, the conventional power control method in a cell overlap region in transmitting and receiving the above-described channels uses a power control method in a cell overlap region which is commonly used. have. The power control method in the conventional cell overlap region will be described with reference to FIG. 1 as an example. After the cell # 1 101 and the cell # 2 103 receive the UL_DPCH transmitted by the UE 111, The RNC controlling the cells 101 and 103 interprets the power control command. Accordingly, if the received signal in any one of the cell # 1 101 and the cell # 2 103 exceeds the appropriate value, the cell overlapping area due to the excessive transmission power of the UE in the cell where the received signal exceeds the appropriate value In order to suppress the occurrence of interference noise within the UE 111 to transmit a command to lower the reverse transmission power. Meanwhile, since the UE 111 simultaneously receives the DL_DPCH transmitted from the cell # 1 101 and the cell # 2 103 with respect to the forward received signal, if the magnitude of the received signal of the DL_DPCH exceeds the appropriate line, the cell overlap region In order to suppress the occurrence of interference noise in the cell, a command to lower forward transmission power is transmitted to the cells in the cell overlap region. The cell and the UE using HSDPA for the up / down power control command also adjust and transmit HS_PDSCH and S_UL_DPCCH, which are not transmitted to other base stations in the cell overlap region, in the same manner as the change trend of the transmission power of DL_DPCH and UL_DPCH, respectively.

When the power control method in the conventional cell overlap region as described above is used for reverse transmission power control of a UE using HSDPA, there are the following problems.

The UL_DPCH transmitted by the UE 111 of FIG. 1 to cell # 1 101 and cell # 2 103 is received in two cells of cell # 1 101 and cell # 2 103, and is then transmitted to the RNC. Since it is interpreted, the UL_DPCH is typically transmitted with a smaller transmission power than when transmitting to one cell. However, since S_UL_DPCCH is information necessary only for cell # 1 101 transmitting HSDPA, and cell # 2 103 is not received, if S_UL_DPCCH transmits using the transmit power applied to the UL_DPCH, the cell # 1 101 transmits the S_UL_DPCCH. May not be interpreted correctly. If the information of the S_UL_DPCCH is not correctly received by the cell # 1 101, the HSDPA itself may not operate correctly because the HARQ mechanism and the MCS level selection or the optimal cell selection in the FCS cannot operate correctly.

Accordingly, in the present invention, when the UE receiving the HSDPA is located in the cell overlap, the present invention proposes a method for separately controlling the transmission power of the UL_DPCH and S_UP_DPCCH to solve the above problems. In addition, in the present invention, when the UE receiving the HSDPA is located in the cell overlap, a base station can correctly estimate the S_UL_DPCCH channel while maintaining the existing power control method to solve the above-mentioned problem significantly.

An object of the present invention is to provide an apparatus and method for separately controlling transmission power for each channel when two or more channels exist in the reverse direction in a mobile communication system using a code division multiplexing scheme.
It is still another object of the present invention to provide an apparatus and method for enabling a base station to reliably interpret a reverse control channel for fast forward packet access.

Another object of the present invention is to provide an apparatus and method for separately controlling power of reverse control channels in a mobile communication system supporting downlink high speed packet transmission.

Another object of the present invention is to provide an apparatus and method for power control of reverse channels when a UE receiving the downlink high speed packet transmission is located in a cell overlap region in a mobile communication system supporting downlink high speed packet transmission. have.

Another object of the present invention is to provide an apparatus and method for separately generating an uplink transmit power control command for UL_DPCH and an uplink transmit power control command for S_UL_DPCCH for the power control method presented in the present invention.

It is still another object of the present invention to provide an apparatus and method for measuring signal transmission power by placing a pilot field in S_UL_DPCCH in addition to the pilot field of UL_DPCH for the power control method proposed in the present invention.

Another object of the present invention is to provide an apparatus and method for separately transmitting an uplink transmit power control command for UL_DPCH and an uplink transmit power control command for S_UL_DPCCH for the power control method proposed in the present invention.

It is still another object of the present invention to provide a method for preventing excessive generation of signal interference noise in an overlapping region of an uplink transmission power of S_UL_DPCCH determined by the power control method proposed in the present invention. .

Another object of the present invention is to provide a separate pilot channel for each channel by providing a separate pilot for each channel when there are two or more channels in the reverse direction in a mobile communication system using a code division multiplexing scheme It is to provide an apparatus and method that can be performed.

Still another object of the present invention is to provide a pilot for each channel separately for reverse channels in a mobile communication system supporting downlink high-speed packet transmission so that a base station can perform separate channel compensation for the channels. And providing a method.

It is still another object of the present invention to provide an apparatus and method for channel compensation of reverse channels separately when a UE receiving the downlink high speed packet transmission is located in a cell overlap region in a mobile communication system supporting downlink high speed packet transmission. In providing.

Another object of the present invention is to provide an apparatus and method for separately estimating and compensating for a power control method according to the present invention by putting a pilot field in S_UL_DPCCH in addition to the pilot field of UL_DPCH.
In the present invention for achieving the above object, the power control method of the mobile terminal, the dedicated data and the high-speed packet data through the high-speed data sharing channel from the first base station through the forward dedicated physical channel at the same time service, When there is a mobile terminal in a soft handover area where dedicated data through a forward dedicated physical channel is served from at least one second base station adjacent to a base station, a reverse dedicated data channel is transmitted from the mobile terminal to the first base station and the second base station. Transmits dedicated data through the first reverse dedicated control channel and transmits control information including pilot information and transmission power control information necessary for receiving the dedicated data, and transmits the high speed packet through a second reverse dedicated control channel. Confirmation information indicating whether data is received and the first base station In a code division multiple access mobile communication system for transmitting forward channel state information between the mobile stations, a method for performing power control of the second reverse dedicated control channel separately from power control of the first reverse dedicated control channel And the second reverse dedicated control channel has a subframe consisting of three slots, allocating and transmitting pilot bit information to at least one of the slots, and corresponding to the pilot bit information from the first base station. And receiving the transmission power control information through the forward dedicated physical channel, and controlling the transmission power for the second reverse dedicated control channel by the transmission power control information.
In the present invention for achieving the above object, the power control method of the base station, the dedicated data and the high-speed packet data through the high speed data sharing channel from the first base station through the forward dedicated physical channel at the same time, the first base station When there is a mobile terminal in a soft handover area where dedicated data is serviced from at least one second base station adjacent to a forward dedicated physical channel, the mobile station from the mobile terminal to the first base station and the second base station through a reverse dedicated data channel. Transmits dedicated data and transmits control information including pilot bit information and transmission power control information necessary for receiving the dedicated data through a first reverse dedicated control channel, and transmits the high speed packet through a second reverse dedicated control channel. Confirmation information indicating whether data is received and the first base In a code division multiple access mobile communication system for transmitting forward channel state information between a station and the mobile terminal, the power of the second reverse dedicated control channel is separated by the first base station separately from power control of the first reverse dedicated control channel. In the method for performing control, the second reverse dedicated channel has a subframe consisting of three slots, the second secondary corresponding to the pilot bit information transmitted through at least one of the slots Generating second transmission power control information for power control of a reverse dedicated control channel, and transmitting the second transmission power control information through the forward dedicated physical channel at the time of transmission of the second transmission power control information; Characterized in that it comprises a.
In the present invention for achieving the above object, the power control apparatus of the mobile terminal, the dedicated data and the high-speed packet data through the high-speed data sharing channel from the first base station through the forward dedicated physical channel at the same time service, When there is a mobile terminal in a soft handover area where dedicated data through a forward dedicated physical channel is served from at least one second base station adjacent to a base station, a reverse dedicated data channel is transmitted from the mobile terminal to the first base station and the second base station. Pilot bit required for transmitting dedicated data through the first dedicated dedicated control channel and transmitting the dedicated data Control information including information and transmission power control information, and confirming information indicating whether the high-speed packet data is received through a second reverse dedicated control channel, and forward channel state information between the first base station and the mobile terminal. In a code division multiple access mobile communication system transmitting, In the apparatus for performing power control of the second reverse dedicated control channel separately from the power control of the first reverse dedicated control channel, the second reverse dedicated control channel has a subframe consisting of three slots. And a transmission apparatus for allocating and transmitting pilot bit information to at least one of the slots, receiving transmission power control information corresponding to the pilot bit information from the first base station through the forward dedicated physical channel, and transmitting the transmission power. And a receiving apparatus for controlling the transmission power for the second reverse dedicated control channel by control information.

In the present invention for achieving the above object, the power control apparatus of the base station, the dedicated data and the high-speed packet data through the high-speed data sharing channel from the first base station through the forward dedicated physical channel at the same time, the first base station When there is a mobile terminal in a soft handover area where dedicated data is serviced from at least one second base station adjacent to a forward dedicated physical channel, the mobile station from the mobile terminal to the first base station and the second base station through a reverse dedicated data channel. Transmits dedicated data and transmits control information including pilot bit information and transmission power control information necessary for receiving the dedicated data through a first reverse dedicated control channel, and transmits the high speed packet through a second reverse dedicated control channel. Confirmation information indicating whether data is received and the first base In a code division multiple access mobile communication system for transmitting forward channel state information between a station and the mobile terminal, the first base station In the apparatus for performing power control of the second reverse dedicated control channel separately from the power control of the first reverse dedicated control channel, the second reverse dedicated control channel has a subframe consisting of three slots. And a receiver for obtaining a second channel estimation result in response to pilot bit information transmitted through at least one of the slots, and controlling power of the second reverse dedicated control channel based on the second channel estimation result. And a transmitter for generating second transmission power control information for transmitting the second transmission power control information through the forward dedicated physical channel at the time of transmission of the second transmission power control information.

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Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

For convenience of description of the present invention to be described below, HSDPA in 3GPP, which is a standard of the third generation asynchronous mobile communication system, is described as an example, but other other methods of simultaneously controlling power of two or more reverse channels are provided. The present invention can be equally applied to a communication system. On the other hand, in the present invention to be described later in performing power control of the forward and reverse dedicated physical control channels for HSDPA, a conventional mobile communication terminal and base station and a mobile communication terminal supporting the HSDPA service that does not support the HSDPA service And a method of separately performing power control of UL-DPCCHs to maintain compatibility between base stations.

8A to 8D show examples of a slot structure of S_UL_DPCCH proposed to separately control transmission power of UL_DPCH and S_UL_DPCH according to the present invention, and assume the length of S_UL_DPCCH as three timeslots. However, even when the length of the S_UL_DPCCH is not three timeslots, it is possible to use the present invention to be described later. 8A to 8D, ACK / NACK information, measurement report information, and the position and length of a pilot may be changed. In addition, only ACK / NACK information and pilot may be transmitted as needed, and ACK / NACK information, measurement report information, and pilot may be transmitted. The ACK / NACK information and the measurement report information may be transmitted as the information itself, may be transmitted after being repeatedly a predetermined length or more, and may be transmitted after being encoded through a separate encoding process.

FIG. 8A illustrates a structure in which the ACN / NACK field 803 and the ACK / NACK field 805 are transmitted once or repeatedly three times in three time slot periods 801. The ACK / NACK field is an area in which a UE sends a positive response or a negative response to an n-channel SAW packet received through HS_PDSCH. In the case of the acknowledgment, the cell receiving the same transmits the next packet corresponding to the n channel, and in the case of the negative response, the cell receiving the acknowledgment retransmits the previously transmitted packet. The pilot field 805 is a field for estimating the size and channel environment of the received signal of the S_UL_DPCCH. The pilot pattern used for the UL_DPCCH may be used again, and in the simplest form, an all 1 sequence may be transmitted by an advance appointment of a base station and a terminal. In addition, a pattern different from the pilot pattern of UL_DPCCH for performance improvement may be set and transmitted. In addition, the same pilot pattern may be transmitted for each time slot, and different pilot patterns may be used to distinguish the order between time slots. Whatever the type of pilot is, using a predefined value between the base station and the UE may be most preferably used to estimate the reverse transport channel environment and signal size of the S_UL_DPCCH. If a value not previously promised is transmitted, only a pilot signal size of the S_UL_DPCCH can be measured, so that a slight performance degradation may be brought.

8B illustrates a structure of S_UL_DPCCH in which measurement report information 817 is transmitted in time division in addition to the ACK / NACK field 813 and the pilot field 815 of FIG. 8A. The ACK / NACK field 813 and the pilot field 815 have the same functions as the ACK / NACK field 803 and the pilot field 805 of FIG. 8A. The S_UL_DPCCH having the structure of FIG. 8B may be transmitted only to one time slot among three time slots, or may be repeatedly transmitted during three time slots.

FIG. 8C illustrates a structure in which an ACK / NACK field 823 and a pilot field 825 are transmitted using all three timeslots 821 as S_UL_DPCCH, and FIG. 8D illustrates an ACK / NACK field 831 and a pilot. The field 833 and the measurement report information 835 are transmitted using all three timeslots 831. The functions and configuration methods of the fields of FIGS. 8C and 8D may be the same as the functions and the configuration methods of the fields of FIGS. 8A and 8B.

4 is an example of a base station transmitter according to an embodiment of the present invention.

Referring to FIG. 4, the controller 401 inputs a first pilot channel estimation result 451 which is a pilot field of UL_DPCCH and a second pilot channel estimation result 452 which is a pilot field of S_UL_DPCCH, received through a base station receiver. A TPC command to be applied to the UL_DPCCH and a TPC command to be applied to the S_UL_DPCCH are generated. The controller 401 inputs the TPC command applied to the UL_DPCH and the TPC command applied to the S_UL_DPCCH, respectively, to the multiplexer 420 at a suitable time point.

In the method of determining a transmission time point of the TPC for UL_DPCH and TPC for S_UL_DPCCH in the controller 401, various matters as follows may be considered. First, data transmission rate, channel status, signal size and importance of UL_DPDCH transmitted by the UE, second, channel status and signal size of S_UL_DPCCH, third, power control ratio of UL_DPCH and S_UL_DPCCH, transmission length of S_UL_DPCCH, and the like. For convenience of description of the present invention, it is assumed that the TPC command for S_UL_DPCCH is transmitted once after the TPC command for UL_DPCH is transmitted twice in FIGS. 4 and 7. As described above, the transmission rate of the TPC command for the UL_DPCH and the transmission rate of the TPC command for S_UL_DPCCH may be adjusted according to circumstances. The adjustment ratio may be transmitted to the UE through an upper layer signaling message or a physical channel control message, or may be changed by an advance appointment between the base station and the UE.

The multiplexer 420 configures DL_DPCH and configures DL_DPCCH by inputting TPC 402, pilot 403, and TFCI 404 as inputs. After the user data 411 or higher signaling control information is convolutionally coded or turbo coded through the encoder 412, the rate matching unit 413 is processed into a form suitable for transmission through a physical channel, and then the output signal is input. DL_DPDCH is configured.

The DL_DPCH output from the multiplexer 420 is channel encoded by the channel code used for the DL_DPCH in the spreader 421 and then multiplied by the channel gain value applied to the transmit power of the DL_DPCH in the multiplier 422. The channel compensated DL_DPCH is input to a summer 460 and summed with other forward transport channels. The channel gain value applied to the transmission power of the DL_DPCH may be set in consideration of the transmission rate of the DL_DPCH and a TPC command received in the reverse channel.

The i-th user data 431 to be transmitted through the HS_PDSCH is encoded using an appropriate channel encoding method in the encoder 432 and then processed into a form suitable for transmission on a physical channel in the rate matching unit 433. The processed user data is channel coded at spreader 434, multiplied by the appropriate channel gain at multiplier 435, and then input to summer 460 to be combined with other forward channels. As described above, the spreader 434 may have a plurality of channel codes. The spreader 434 may increase the speed of forward data transmission by using the channel codes.

The TFRI information 441 is information indicating a channel code used for the HS_PDSCH, an MCS level, and values applied to the HS-DSCH in the rate matching unit 433 so that the UE can correctly interpret the HS-DSCH. Can be. The HARQ information 442 is information that indicates to the UE whether the packet transmitted through the HS_PDSCH is an initial transmission packet or a retransmission packet. The information on the characteristics of the packet transmitted to the currently received HS-PDSCH is provided through the information. Each can be identified and used for a proper purpose. In the case of a packet that has been retransmitted, the appropriate purpose may be reproduced as an appropriate signal in combination with a packet in which a previously received error occurs.

The TFRI information 441 and the HARQ information 442 are encoded in an appropriate manner through the encoder 443 and the encoder 444, respectively, and are input to the multiplexer 445. The TFRI information 441 and the HARQ information 442 may be transmitted in the form of simple information, or may be transmitted by a separate coding method or simply repeated to increase reliability. The multiplexer 445 configures the SHCCH by using the outputs of the encoder 443 and the encoder 444 and then outputs the SHCCH. The call from the multiplexer 445 is inputted to the powerful scene spreader 446, spread to the channel code for the SHCCH, and then multiplied by the channel gain for the HS-SCCH in the multiplier 447 and then adder 460. ).

The summer 460 sums the DL_DPCH, the HS-PDSCH, the HS-SCCH, and the forward common channels for transmitting control signals of the base station and channels of other users not described in FIG. 4. Since the channel codes are multiplied so that the forward channels can be distinguished from each other, the UE can properly interpret only the signals received through the forward channel desired by the UE. The signals output from the summer 460 are mixed with the scrambling code used by the base station in the multiplier 461 and then input to the modulator 462 and modulated. The modulated signal is raised to the carrier band by the RF unit 463 and then transmitted to the UE through the antenna 464. The scrambling code used in the multiplier 461 is used to distinguish the downlink signal between each base station or cells.

5 is an example of a base station receiver according to an embodiment of the present invention.

The signal of the UE received through the antenna 501 is converted to the baseband in the RF unit 502 and then demodulated in the demodulator 503. The demodulated signal is demixed using the scrambling code used by the UE in multiplier 504 again. The scrambling code used by the UE serves to distinguish signals between a plurality of UEs received by the base station. The signal of the UE output from the multiplier 504 is input to the despreader 510, the despreader 520, and the despreader 530, respectively, and is divided into UL_DPCCH, UL_DPDCH, and S_UL_DPCCH. The despreader 510, the despreader 520, and the despreader 530 multiply the channel codes used for the UL_DPCCH, UL_DPDCH, and S_UL_DPCCH, respectively, to perform the despreading process. The UL_DPCCH output from the despreader 510 is separated from only the pilot field 512 by the demultiplexer 511 and input to the channel estimator 513. The pilot field 512 is used to estimate the reverse channel environment. After the size of the pilot signal is estimated, the base station uses the size of the pilot signal to generate a TPC command for power control of UL_DPCH. The UL_DPCCH input to the multiplier 514 is corrected by the channel estimator estimated by the channel estimator 513 and input to the demultiplexer 515 to demultiplex the TPC 516, the TFCI 517, and the FBI 518. do.

The UL_DPDCH output from the despreader 520 is corrected using the channel estimator value of the channel estimator 513 in the multiplier 521 and then input to the decoder 522 to recover the i-th user data or the higher layer signaling message. do. The decoder 522 is defined as performing inverse rate matching.

In the S-UL_DPCCH output from the despreader 530, the pilot field 540 is separated from the demultiplexer 532. The pilot 540 separated from the S_UL_DPCCH is inputted to the channel estimator 522, estimated by the channel, and then transmitted to the controller 550.

The S-UL-DPCCH channel corrected by the multiplier 533 is input to the demultiplexer 535, separated into ACK / NACK and channel report information, and then input to the decoder 536 and decoder 538, respectively. Channel measurement information 537 and ACK / NACK are recovered. The decoder 536 and the decoder 538 are defined as decoders having a decoding function for code and repetitive transmission in the same manner used by the UE.

The controller 550 inputs a signal estimation result of the pilot field of the UL-DPCCH estimated by the channel estimator 513 and a channel estimation result of the pilot field of the S-UL-DPCCH estimated by the channel estimator 534, Generate a TPC instruction for each channel. Multiplier 533 by controlling a switch 551 connected to the channel estimator 513 and a switch 552 connected to the channel estimator 534 to enable separate channel estimation for the channels to which the TPC is applied. To change the estimated channel value. That is, when receiving a signal transmitted by applying the TPC for UL_DPCCH, the channel estimation value of the S-UL-DPCCH can be corrected by using the channel estimation value using the pilot field of the UL_DPCCH. When the S-UL-DPCCH to which the S-UL-DPCCH is applied is received, the S-UL-DPCCH can be channel-corrected using the channel estimation value using the pilot field of the S-UL-DPCCH. . If the controller 550 is transmitted to only one UE but estimates each channel for channels having different channel measurement data and performs channel correction with the estimated values, the channel correction gain becomes better. You can get it. In addition, regardless of the type of TPC transmitted from the base station while the S-UL-DPCCH is transmitted, if the S-UL-DPCCH is separately measured and the channel correction is performed, it may have a better effect on improving the performance of the S-UL-DPCCH. Could be.

6 is an example of a terminal transmitter corresponding to the base station receiver of FIG. 4.

The controller 601 applies the channel gain 651 applied to the UL-DPCH, the first pilot 611 applied to the UL-DPCCH, the channel gain 652 applied to the S-UL-DPCCH, and the S-UL-DPCCH. It is responsible for generating and controlling the second pilot 621, etc. to be applied. The controller 601 receives a plurality of TPCs transmitted from a base station. A channel gain 652 and a channel gain 651 are generated using the TPC for the S-UL-DPCCH and the TPC for the UL-DPCH, respectively. The channel gain 652 may be directly determined using a TPC received by a base station transmitting an HSDPA, and another signal generated by the S-UL-DPCCH in a cell overlap region because the channel gain to which the received TPC is applied is too high. If the amount of the interference signal for is too large, it may be determined as a specific threshold. The specific threshold may be determined by the ratio of the relative transmit power to the UL-DPCH or may also be determined by the magnitude of the absolute transmit power. The ratio of the relative transmission power or absolute transmission power relative to the UL-DPCH may be a value transmitted from the base station to the UE by using higher layer signaling or a physical layer signal or previously promised by the base station and the UE. .

The multiplexer 615 receives the first pilot 611, TFCI 613, and FBI 614 outputted from the TPC 612 and the controller 601 for the control of the forward transmission power to configure the UL-DPCCH. do. The UL-DPCCH output from the multiplexer 615 is spread by the channel code applied to the UL-DPCCH in the spreader 616 and then multiplied by the channel gain 615 in the multiplier 617 and input to the summer 640. do.

The user data 631 or higher layer signaling information is encoded by an appropriate code in the encoder 632, and then processed by the rate matching unit 633 to be suitable for the physical channel transmission type. The signal output from the rate matching unit 633 is input to the spreader 634 to become UL_DPDCH, and then multiplied by the multiplier 635 to the UL-DPDCH channel gain and input to the summer 640. The channel gain applied by the multiplier 635 may be determined by the difference in transmission rates between UL_DPCCH and UL_DPDCH with respect to the channel gain applied by the multiplier 617.

The multiplexer 627 inputs a value in which ACK / NACK 625, which is control information for N-channel HARQ, is encoded by the encoder 626 and a value in which channel measurement information 623 is encoded by the encoder 624. In addition, the second pilot 621 determined by the controller 601 is received as an input to configure the S-Ul-DPCCH. As described above, the second pilot 621 may use the same pattern as the first pilot, and a pattern different from the first pilot may be used.

The summer 640 sums up the input reverse signals and outputs the summed signals to the multiplier 641. Since the uplink signals summed by the summer 640 can be distinguished by different channel codes, the base station receiving the signals can reproduce appropriate signals. The multiplier 641 uses a reverse scrambling code used by the UE to perform a mixing process to distinguish the backward signals from the UE from reverse signals of other UEs. The signals output from the multiplier 641 are input to the modulator 642, modulated, and then input to the RF unit 643, and then transmitted to the base station through the antenna 644 as a signal of a carrier band.

FIG. 7 is a diagram illustrating the number of cells in a cell overlap area where a UE is located as an example of a UE receiver corresponding to the base station transmitter of FIG.

The forward signal received through the antenna 701 is converted into a baseband signal by the RF unit 702 and then demodulated by the demodulator 703 and input to the multiplier 704. The multiplier 704 performs a demixing process on the forward signals using the same forward scrambling code used at the base station. The demixed forward signals are input to the despreader 710, the despreader 730, the despreader 740, and the despreader 750, respectively, to receive DL_DPCH and HS from other base stations that do not transmit DL_DPCH and HS-DSCH. -Divided into PDSCH and SHCCH.

The DL_DPCCH of the base station transmitting the HS-DSCH output from the despreader 710 is input to the demultiplexer 711 and separated from the TPC 721. The DL_DPCCH of the base station that does not transmit the HS-DSCH output to the despreader 730 is input to the demultiplexer 731 and separated from the TPC 723. The TPC 721 and the TPC 723 are input to the controller 760 and used to determine the uplink transmission power of the UL_DPCH and the S-UL-DPCCH of the UE.

The outputs of the demultiplexer 711 and the demultiplexer 731 are input to the summer 712 and summed. The summed signals are input to the demultiplexer 770 so that only the pilot 771 is distinguished and input to the channel estimator 720. The channel estimation result of the pilot signals 771 input to the channel estimator 720 is input to the controller 760 and used to generate a TPC command for forward transmission power control of base stations communicating with the UE. The channel estimation result of the channel estimator 720 is input to the multiplier 713 and used for channel compensation of the DL_DPCH output from the summer 712. The channel compensated DL_DPCH is inputted to the demultiplexer 717 to distinguish the TFCI 717 and the DL_DPDCH. The DL_DPDCH output from the demultiplexer 715 is decoded by the decoder 718 and then restored to user data 719 or higher layer signaling information. The decoder 718 is assumed to be a decoder capable of performing inverse rate matching.

The HS_PDSCH output from the despreader 740 is input to the multiplier 741, channel compensated for the channel estimation result of the channel estimator 720, and then output to the decoder 742. In FIG. 7, the channel estimation result of the channel estimator 720 is assumed to be one channel estimation result after the sum of DL_DPCHs to the UE. However, if the pilot signals of the DL_DPCHs are distinguished from each other and channel estimation is performed, The applied channel estimate value may be replaced with an estimated value of a channel signal of a pilot field of DL_DPCCH from the base station transmitting the HS-PDSCH. The HS-DSCH output from the multiplier 741 is decoded and deinterleaved by the decoder 742 and then returned to user data. In the present invention, a detailed N-Channel SAW HARQ is not described for convenience of description, but the HS-DSCH decoded by the decoder 742 may be used for the operation of the N-channel SAW HARQ as described above.

The SHCCH output from the despreader 750 is channel compensated by the channel estimation result output from the channel estimator 720 in the multiplier 751. The channel estimate value used in the multiplier 751 is also similar to the channel estimate value output from the multiplier 741. If the pilot signals of the DL-DPCHs are distinguished from each other, the pilot field of the DL_DPCH of the base station transmitting the SHCCH is determined. The analyzed values can be used as channel estimation results.

The channel compensated SHCCH in the multiplier 751 is input to the demultiplexer 752 and separated into TFRI information and HARQ information, and the TFRI information and HARQ information are respectively decoded through the decoder 753 and the decoder 754. 755 and HARQ information 756, and then used for each purpose.

The controller 760 receives a signal estimation result of all TPCs and a pilot field of the DL_DPCCH received by the UE to determine the uplink transmit power of the UL-DPCH and the uplink transmit power of the S-DL-DPCCH. If the TPC command transmitted from the base station transmitting the HSDPA to the UE using the receiver of FIG. 7 was for the UL-DPCCH, the transmission power of the UL-DPCH may be determined including the TPC command. If the TPC command for the S-UL-DPCCH is not received at the time of transmission of the S-UL-DPCCH after receiving the TPC command, the transmission of the S-UL-DPCCH is applied by applying a constant power offset to the transmission power of the UL-DPCH. Power can also be determined. In addition, if the TPC transmitted from the base station transmitting the HSDPA is a TPC for the S-UL-DPCCH, the transmission power of the UL-DPCH is determined by using other TPC commands in a situation other than the TPC, and the S-UL-DPCCH The transmit power can be determined using the TPC for the S-UL_DPCCH.

An example of an operation flowchart of a base station controller and an example of a terminal controller operation flowchart of the reverse power control method according to the present invention are shown in FIGS. 9 and 10, respectively. For convenience of explanation of the present invention, it will be described assuming the situation shown in FIG.

9 is an example of an algorithm of a base station controller according to the present invention.

Referring to FIG. 9, in step 900, the base station determines whether a UE receiving an HS-DSCH from the base station is in a cell overlap region. The determination of whether the UE is in the cell overlap area is performed by the base station after allowing the UE to communicate with other base stations in the cell overlap area after receiving size information on signals of other base stations measured by the UE. Since it is controlled, the base station can sufficiently determine the result. In step 901, the base station receives a pilot field of P_UL_DPCCH, a TPC command, and a pilot field of S-UL-DPCCH from the UE. In step 901, P_UL_DPCCH transmits control information of a forward dedicated channel, and S-UL-DPCCH transmits reverse control information for HSDPA. In step 901, when the base station receives the S-UL_DPCCH from the reverse direction, the structure of the S-UL-DPCCH when the UE is located in the cell overlap region and when the UE is not located in the cell overlap region may be different. That is, when the UE is not located in the cell overlap region, since the base station transmitting and receiving with the UE is only one base station transmitting the HS-DSCH, the UE may perform S-UL for controlling transmission power of the S-UL-DPCCH. No need to send pilot information to DPCCH. Therefore, when the UE is not located in the cell overlap region, the form of the S-UL-DPCCH may be possible without the pilot field in various forms shown in FIG. 8 of the present invention. However, in the description of FIG. 9, it is assumed that the UE always uses the same slot type of S-UL_DPCCH. An advantage of the UE always using the same slot type of the S-UL-DPCCH may be to reduce unnecessary signaling between the base station and the UE transmitting the HSDSCH for changing the slot type of the S-UL-DPCCH. have. The disadvantage is that if the UE is not located in the cell overlap region, the UE consumes unnecessary signals, thereby increasing the battery consumption of the UE. As a solution to the drawback of increasing the battery consumption of the UE, when the UE is not located in the cell overlap region, the DTX (D-PCH) without transmitting the pilot field portion of the S-UL-DPCCH of the UE Discrete Transmission Off) may be a method.

In step 902, the base station determines whether the pilot field of S_UL_DPCCH is correctly received. If it is determined in step 902 that the pilot field of the S-UL-DPCCH has not been received, in step 911, the pilot field of the P_UL_DPCCH is interpreted to generate a TPC command to be applied to the P_UL_DPCCH.

If the base station confirms reception of the S_UL_DPCCH pilot field in step 902, it analyzes the pilot field of P_UL_DPCCH and the pilot field of S_UL_DPCCH in step 903. The pilot field of P_UL_DPCCH and the pilot field of S_UL_DPCCH interpreted in step 903 are used to generate a TPC command to be applied to P_UL_DPCCH and a TPC command to be applied to S_UL_DPCCH in step 904.

In step 905, the base station determines whether the transmission time of the TPC for the S_UL_DPCCH. Whether to determine the transmission time of the TPC for the S_UL_DPCCH may be determined in consideration of various matters as follows. The importance of data transmitted through the UL-DPDCH, the power control period of the UL-DPCH according to the movement speed of the UE, the received signal quality of the P_UL_DPCH, the received signal quality of the S-UL-DPCCH may be considered. If the importance of the data transmitted on the UL_DPDCH is not high, the TPC for the S_UL_DPCCH may be transmitted more frequently in order to receive the backward control information for the HSDSCH more correctly. On the other hand, if it is okay to lower the speed of the power control cycle of the UL-DPCH according to the movement speed of the UE, the TPC for the S-UL-DPCCH can be transmitted more frequently, and the received signal quality of the P-UL-DPCH is good, If the channel environment from the UE to the base station is not severely changed, the TPC for S-UL-DPCCH may be transmitted more frequently. Finally, if the signal quality and the channel environment of the S-UL-DPCCH are small, the TPC for the S-UL-DPCCH may be transmitted more frequently.

In the above description, when the UE is located in the cell overlap region, the UL-DPCH and the S_UL-DPCH have different transmission powers of signals. In addition, since the UL-DPCH is located in the cell overlap region, the base stations in the cell overlap region receive all the UL-DPCH of the UE, so that the signal quality and the UL-DPCH and the S-UL-DPCH transmitted from one UE may be reduced. The channel environment may be sufficiently different.

 If it is determined in step 905 that it is not the time of TPC transmission for S_UL-DPCCH, in step 906, it is determined to transmit the TPC command for P_UL_DPCCH. In step 905, if it is determined that it is the time of TPC transmission for S_UL-DPCCH, in step 907 Determines TPC command transmission for S_UL_DPCCH. Although the TPC determined in step 906 is for the UL_DPCCH, the UL_DPCCH and the UL_DPDCH may be applied to the UL-DPDCH because only the transmission rate is different and all other environments are the same.

In step 908, the downlink transmission power is determined according to the forward power control command received in step 901, and then the corresponding TPC command is transmitted together with other forward signals transmitted from the base station to the UE.

In step 909, it is determined whether the UE communicating with the base station is out of the cell overlap region or whether the transmission of the HS-DSCH to the UE is completed. If the UE is out of the cell overlap region or the HS-DSCH transmission to the UE is completed, in step 910, the reverse transmission power of the UE is controlled through a normal power control algorithm that controls only the reverse transmission power of the UL-DPCH. If not, the process is repeated from step 901.

The description of the operation algorithm of the base station controller illustrated in FIG. 9 assumes whether to perform the operations of steps 901 to 908 according to whether the terminal is in a cell overlap region. That is, when the terminal is located in the cell overlap region, the terminal should transmit the pilot field in S_UL_DPCCH for every S_UL_DPCCH subframe of 2ms units in order for the base station to always perform the operations of step 901 to 908. This may increase interference with a base station that does not transmit HS-DSCH data to the terminal.

Therefore, as another example of reducing the interference, the terminal is located in a cell overlap region, and the ACK / NACK information and the channel report message can be correctly received by the HSDPA base station only when it is scheduled to receive HS-DSCH data. Suggest a solution. Because of this. The terminal transmits a pilot field to S_UL_DPCCH, and correspondingly, the HSDPA base station may control the S_UL_DPCCH transmission power and the P_UL_DPCCH transmission power separately by performing the operation of FIG. 9.

More specifically, when the terminal is located in a cell overlap region, the HSDPA base station schedules transmission of HS-DSCH data to the terminal and transmits control information necessary for receiving HS-DSCH data through the SHCCH. The terminal transmits a pilot field to S_UL_DPCCH by the operation of FIG. 10 after receiving the SHCCH until transmitting ACK / NACK information for the HS-DSCH data. Meanwhile, the HSDPA base station separately controls the S_UL_DPCCH transmission power and the P_UL_DPCCH transmission power by the operation of FIG. 9 while the S_UL_DPCCH pilot field is transmitted by the terminal.

As described above, when the terminal is located in the cell overlap region, transmission of the S_UL_DPCCH pilot field is determined according to whether the SHCCH control information (ie, HS-DSCH data) is received. If the S_UL_DPCCH pilot field is not transmitted, a pilot field may be used among various forms of the S_UL_DPCCH structure shown in FIGS. 8A to 8D as described above. Alternatively, when the UE is located in the cell overlap region, the SHCCH control information is not received while the S_UL_DPCCH is always transmitted in the form of the pilot field, and thus the S_UL_DPCCH pilot is not actually transmitted, the DTX transmission may be processed as described above.

FIG. 10 is a flowchart illustrating an operation of the terminal controller of FIG. 9.

Referring to FIG. 10, in step 1001, a terminal receives a TPC command from a base station. In step 1002, it is determined whether the TPC command received in step 1001 is a TPC for S_UL_DPCCH. If it is determined that the TPC command received in step 1002 is a TPC for S_UL_DPCCH, in step 1003, the TPC command for S_UL_DPCCH and the P_UL_DPCCH TPC received from other base stations are separated and interpreted. In step 1003, the transmission power for the S_UL_DPCCH and the transmission power for the P_UL_DPCCH are determined using the TPCs analyzed separately in step 1003. If the S_UL_DPCCH TPC is frequently transmitted in the determination of the transmit power for the S_UL_DPCCH, the transmit power of the S-UL-DPCCH may be determined by setting the relative value of the transmit power to which the TPC is applied as a small value, and the TPC for the S_UL_DPCCH. If the transmission period of is very long, the transmission power of the S-UL_DPCCH may be determined by setting a relative value of the transmission power to which the TPC is applied as a large value. As a simple example, if the TPC for the S-UL-DPCCH is transmitted 1000 times per second, the UE receiving the TPC may adjust the transmit power of the S-UL-DPCCH by setting the power setting step to about 1 dB, and the TPC is 1 If only 500 transmissions per second are received, the UE receiving the TPC may adjust the transmit power of the S-UL-DPCCH by setting the power setting level to about 2 dB.

In step 1005, it is determined whether the transmission time of the S-UL-DPCCH. If it is necessary to determine whether the transmission time of the S-UL-DPCCH in step 1005 is necessary, one time slot in the case of FIGS. 8A and 8B illustrating the slot structures of the S-UL-DPCCH proposed in the present invention. Since the reverse control information for the HSDPA may be transmitted using the above-described case, the above-described case is considered. If the S-UL-DPCCHs are transmitted in the same format every slot or during the total period of the S-UL-DPCCH, the determination process of step 1005 is unnecessary.

If it is determined in step 1005 that the transmission time of the S_UL_DPCCH, it is determined in step 1006 whether the transmission power for the S_UL_DPCCH determined in step 1004 does not exceed the threshold. The threshold value used in step 1006 is that the transmission power of the S-UL-DPCCH to which the TPC for the S-UL-DPCCH transmitted from the base station is applied is determined too much, thus causing excessive interference to other UEs located in the cell overlap region. This value is used to prevent the signal.

If the transmission power of the S-UL-DPCCH determined in step 1004 does not exceed the threshold in step 1006, after generating a pilot signal for S_UL_DPCCH and a pilot signal for P_UL_DPCCH in step 1007, and in step 1008, the transmission determined in step 1004. P_UL_DPCCH and a corresponding UL-DPDCH are transmitted with power, and S_UL_DPCCH is transmitted with the transmission power determined in step 1004.

If it is determined in step 1006 that the transmit power of the S_UL_DPCCH exceeds the threshold, in step 1021, the transmit power of the S_UL_DPCCH is determined by applying the threshold for the S_UL_DPCCH. In the present invention, the threshold for the S_UL_DPCCH is applied for convenience of description, but in general, the threshold for the sum of the transmission powers of all reverse channels of S_UL_DPCCH, UL_DPCCH, and UL_DPDCH is applied. That is, if the sum of the transmission powers of all the reverse channels is greater than or equal to the threshold, the transmission power is lowered at the same rate for each channel so that the transmission power of the channels does not become greater than or equal to the threshold. Since the information transmitted through the S_UL_DPCCH for the HSDPA service is very important information for the HSDPA service, the ratio of lowering the UL_DPCCH, UL_DPDCH and S_UL_DPCCH transmission powers may be set differently when the sum of the transmission powers of the reverse channels is greater than or equal to the threshold. That is, the ratio of lowering the transmission power of the UL_DPCCH and UL_DPDCH may be greater than S_UL_DPCCH so that the base station can reliably receive the S_UL_DPCCH channel. In step 1007, a pilot signal for S_UL_DPCCH is generated, a pilot signal for P_UL_DPCCH is generated, and in step 1008, P_UL_DPCCH and a corresponding UL_DPDCH are transmitted at the transmission power determined in step 1004, and S- at the transmission power determined in step 1004. Send the UL-DPCCH.

If it is determined in step 1002 that the TPC for S_UL_DPCCH has not been received, the TPC for P_UL_DPCCH is analyzed in step 1011, and then, in step 1012, the transmission power to be applied to the P_UL_DPCCH is determined. Step 1013 may be the next process of step 1012, and may be the next process when it is determined in step 1005 that it is not the transmission time of the S_UL_DPCCH. In step 1013, a pilot signal for P_UL_DPCCH is generated, and in step 1014, P_UL_DPCCH and a corresponding UL_DPDCH are transmitted at the transmission power determined in step 1012 or 1004.

In step 1009, it is determined whether the UE is out of the cell overlap region or whether the UE is located in the cell overlap region but there is no more HS-DSCH to receive. If it is determined that the HS-DSCH is out of the cell overlap region or no longer received, the normal power control algorithm for the forward dedicated channel and the reverse dedicated channel is performed in step 1010. If the soft handover is not terminated in step 1009 or there is more HS-DSCH to be received in the cell overlap region, the process is repeated from step 1001.

In the second embodiment of the present invention, when the terminal is located in the cell overlap region, the base station transmits a separate pilot to the reverse dedicated control channel so that the base station can correctly receive the reverse dedicated control channel for HSDPA, and the base station transmits the separate pilot. A method for performing channel estimation on the reverse dedicated control channel using a pilot is provided. In this case, it is assumed that the conventional power control method for the UL_DPCCH is used and no separate power control for the S_UL_DPCCH is performed. Even if the UE is not located in the cell overlap region, a separate pilot may be transmitted to the S_UL_DPCCH, but for convenience of description of the present invention, it is assumed that a separate pilot is transmitted to the S_UL_DPCCH channel only in the cell overlap region.

When the UE is located in the cell overlap region, a separate pilot for channel estimation of the S_UL_DPCCH may be located in the form as shown in FIGS. 8A to 8D. If the UE is not located in the cell overlap region, it will have the S_UL_DPCCH channel structure as shown in FIG. 3B. Typically, the base station estimates a channel using a separate pilot transmitted on the S_UL_DPCCH channel and performs channel compensation on information in three slots, ACK or NACK, and Channel Quality Indicator (CQI) information, which are subframes of the S_UL_DPCCH. To perform. In the present invention, the base station may perform a conventional channel compensation method using a separate pilot of the S_UL_DPCCH channel, or may perform a modified channel compensation method described below. Since the separate pilot is for channel compensation for the ACK / NACK information or the CQI information, the pilot should be transmitted only when one of the two pieces of information is transmitted.

11A to 11C are detailed diagrams illustrating a channel estimation method of S_UL_DPCCH according to the position of the pilot. First, FIG. 11A illustrates an S_UL_DPCCH structure when the separate pilot is located between ACK / NACK and CQI information in an S_UL_DPCCH subframe. The transmission power of the separate pilot, ACK / NACK, and CQI information may be set differently. In general, the transmission power of the information may be determined as a ratio with respect to the transmission power of the UL_DPCCH channel. When the base station receives the S_UL_DPCCH having the structure as shown in FIG. 11A, the base station first receives a separate pilot HS-Pilot 1101 and estimates the channel, and performs channel compensation for the ACK / NACK or CQI using this. 11A corresponds to a conventional method of performing channel compensation in one subframe. However, in the case of the ACK / NACK, since the base station can perform channel compensation for the ACK / NACK only after receiving the HS-Pilot 1101, a time delay before extracting the ACK / NACK information may occur. This ACK / NACK information extraction time delay may be a big factor in reducing the scheduling time of the next HSDPA packet to be transmitted to the base station.

11B and 11C illustrate another S_UL_DPCCH structure for minimizing channel compensation delay for the ACK / NACK. In FIG. 11B, the first structure shows an example in which an HS-Pilot is transmitted at the end of the S_UL_DPCCH subframe, and the second structure corresponds to a case in which the UE transmits only ACK / NACK information in subframe N of S_UL_DPCCH. An example of transmitting a NACK and a CQI is shown. In the second structure, the UE transmits the HS-Pilot 1102 of the subframe N-1 instead of the pilot of the subframe N to compensate for the channel for the ACK / NACK. In the above-described method, since the base station receives the HS-Pilot 1102 and estimates the channel, the base station can immediately perform channel compensation for ACK / NACK. Thus, the time delay problem as described in the first structure does not occur. If the UE is located in the cell overlap region from the S_UL_DPCCH subframe N, the HS-Pilot 1102 may not be transmitted in the subframe N-1 because it is not a structure for transmitting the HS-Pilot in the subframe N-1. . In this case, the terminal transmits the ACK / NACK and the HS-Pilot 1103 in the subframe N. Then, the base station performs channel compensation using the HS-Pilot 1103 after receiving the ACK / NACK of the subframe N. Finally, the third structure shows an example of the S_UL_DPCCH structure when the UE transmits only CQI information in subframe N of the S_UL_DPCCH channel. Even if a time delay such as ACK / NACK occurs when a base station extracts the CQI information, there is no effect on HSDPA packet scheduling. Therefore, the UE may transmit the CQI and the HS-Pilot 1104 of the subframe N, and the base station may perform the channel estimation and the compensation by using the HS-Pilot 1104 after receiving the CQI information.

The first structure of FIG. 11 is a diagram illustrating a structure in which the HS-Pilot is transmitted in the first part of the S_UL_DPCCH subframe. In the second structure of FIG. 11C, an example of the structure of S_UL_DPCCH when the UE transmits only ACK / NACK information in subframe N of the S_UL_DPCCH channel and transmits ACK / NACK and CQI together is shown. This is the same structure as the first structure, and the base station receives the HS-Pilot 1105 and estimates the channel, and then receives ACK / NACK or ACK / NACK and CQI to compensate for the channel. The third structure of FIG. 11C shows an example of an S_UL_DPCCH structure when the UE transmits only CQI information in subframe N of the S_UL_DPCCH channel. As a general method, there is a method of transmitting the HS-Pilot 1106 of the S_UL_DPCCH subframe N and the CQI information. If the UE wants to avoid discontinuous transmission, there may be a scheme for transmitting the CQI information and the HS-Pilot 1107 of the subframe N + 1.

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11b and 11c, the terminal may transmit the ACK / NACK or the CQI together with the HS-Pilot of the subframe N. In this case, the base station will perform normal channel estimation and compensation as shown in FIG. 11a.

12 is an example of a terminal transmitter according to a second embodiment of the present invention.

Referring to FIG. 12, the controller 1201 includes a channel gain 1251 applied to the UL-DPCH, a first pilot 1211 applied to the UL-DPCCH, a channel gain 1252 applied to the S-UL-DPCCH, and S. It is responsible for generating and controlling a second pilot 1221 to be applied to the UL-DPCCH. The controller 1201 receives a plurality of TPCs transmitted from the base station and generates a channel gain 1252 and a channel gain 1251 using the TPCs, respectively.

The multiplexer 1215 receives a TPC 1212 and a first pilot 1211, TFCI 1213, and FBI 1214 outputted from the controller 1201 as inputs for UL-DPCCH. Configure Ul-DPCCH output from the multiplexer 1215 is spread by the channel code applied to the Ul-DPCCH in the spreader 1216, and then multiplied by the channel gain 1251 in the multiplier 1217 and input to the summer 1240. do.

The user data 1231 or higher layer signaling information is encoded by an appropriate code in the encoder 1232, and then processed by the rate matching unit 1233 so as to be suitable for a physical channel transmission type. The signal output from the rate matcher 1233 is input to the spreader 1234 to become UL_DPDCH, multiplied by the multiplier 1235 to the channel gain for UL-DPDCH, and then input to the summer 1240. The channel gain applied by the multiplier 1235 may be determined by the difference in transmission rates between UL_DPCCH and UL_DPDCH with respect to the channel gain applied by the multiplier 1217.

The multiplexer 1227 is a controller together with a value in which the ACK / NACK 1225, which is control information for N-channel HARQ, is encoded in the encoder 1226, and a value in which the channel measurement information CQI 1223 is encoded in the encoder 1224. The second pilot 1221 determined at 1201 is multiplexed to configure S-Ul-DPCCH. The second pilot 1221 may use the same pattern as the first pilot or may use a different pattern from the first pilot. If the terminal is located in the cell overlap region, the controller 1201 applies the HS-Pilot 1221 as an input of the multiplexer 1227, and if the terminal is not located in the cell overlap region, the HS-Pilot 1221. Is not applied to the input of the multiplexer 1227.

As described above, when the multiplexing controller 1202 sets different transmission powers for the ACK / NACK 1225, the CQI 1223, and the HS-Pilot 1221, the multiplexing controller 1227 controls the multiplexer 1227 to set different power gains. It is an apparatus for doing this. In addition, the multiplexing controller 1202 is an apparatus for controlling a multiplexer for configuring the S_UL_DPCCH structure as shown in FIGS. 11A to 11C. The multiplexer 1227 may multiplex the S_UL_DPCCH in units of subframes. When the terminal uses the modified channel compensation scheme as illustrated in FIGS. 11A to 11C, the multiplexing controller 1202 multiplexes with the HS-Pilot when the terminal transmits only CQI, ACK / NACK or ACK / NACK. In case of transmitting CQI and CQI together, adjust the multiplexing method with HS-Pilot. For example, when the terminal transmits ACK / NACK, ACK / NACK, or CQI, the multiplexing controller 1202 controls the multiplexer 1227 to configure S_UL_DPCCH as shown in the second structure of FIG. 11 and transmits only CQI information. As shown in the third structure of FIG. 11, a control may be made to configure a channel.

The summer 1240 sums the input reverse signals and outputs the summed signals to the multiplier 1241. Since the uplink signals summed by the adder 1240 may be distinguished by multiplying different channel codes, the base station receiving the signals may reproduce appropriate signals. The multiplier 1241 uses a reverse scrambling code used by the UE to perform a mixing process to distinguish backward signals from the UE from reverse signals of other UEs. The signals output from the multiplier 1241 are input to the modulator 1242, modulated, and then input to the RF unit 1243 to be a signal of a carrier band, and then transmitted to the base station through the antenna 1244.

13 is an example of a base station receiver according to a second embodiment of the present invention.

Referring to FIG. 13, a signal of a UE received through the antenna 1301 is converted into a baseband by the RF unit 1302, and then demodulated by a demodulator 1303, and a scrambling code used by the UE in a multiplier 1304. Use again to demix. The scrambling code used by the UE serves to distinguish signals between a plurality of UEs received by the base station. Signals of the UE output from the multiplier 1304 are input to the despreader 1310, the despreader 1320, and the despreader 1330, respectively, and are classified into UL_DPCCH, UL_DPDCH, and S_UL_DPCCH. The despreader 1310, the despreader 1320, and the despreader 1330 multiply the channel codes used for UL_DPCCH, UL_DPDCH, and S_UL_DPCCH, respectively, to perform the despreading process. The UL_DPCCH output from the despreader 1310 is separated from only the pilot field 1312 by the demultiplexer 1311 and input to the channel estimator 1313 to be used to estimate a reverse channel environment from the UE to the base station. After the size of the pilot signal is estimated, the base station uses the size of the pilot signal to generate a TPC command for power control of UL_DPCH. The controller 1350 generates a TPC command for the UL_DPCH by inputting the signal estimation result of the pilot field of the UL-DPCCH estimated by the channel estimator 1313. The UL_DPCCH input to the multiplier 1314 is corrected by the channel estimator estimated by the channel estimator 1313 and input to the demultiplexer to demultiplex the TPC 1316, the TFCI 1317, and the FBI 1318.

The UL_DPDCH output from the despreader 1320 is corrected using the channel estimator value of the channel estimator 1313 at the multiplier 1321, and then input to the decoder 1322 to be restored to the i-th user data or a higher layer signaling message. . The decoder 1322 is also defined as performing inverse rate matching.

In the S-UL_DPCCH output from the despreader 1330, the pilot field is separated in the demultiplexer 1332. In this case, it is assumed that the demultiplexer 1332 also performs a role of detecting whether the HS-Pilot is transmitted. Since the HS-Pilot according to the present invention is for estimation of a separate channel of the S_UL_DPCCH, the base station may need to detect whether the HS-Pilot is transmitted because only the information is transmitted to the S_UL_DPCCH. Meanwhile, as shown in FIG. 11A, when the BS performs normal channel estimation and compensation, the multiplexer 1332 may detect the HS-Pilot in subframe units. However, when the base station needs to perform the modified channel estimation and compensation as shown in FIGS. 11B and C, the multiplexer 1332 must also detect the HS-Pilot from the adjacent subframe. For example, when the UE transmits ACK / NACK, ACK / NACK, or CQI as shown in the second structure of FIG. 11B, the multiplexer 1332 may detect an HS-Pilot of subframe N-1 and perform channel estimation therefrom. It should be. When the UE transmits only CQI information as shown in the third structure of FIG. 11B, the multiplexer 1332 must detect the HS-Pilot of the subframe N and perform channel estimation therefrom.

The HS-Pilot of the S_UL_DPCCH 1340 is input to the channel estimator 1334 to estimate the channel. The S-UL-DPCCH channel corrected by the multiplier 1333 is input to the demultiplexer 1335, separated into an ACK / NACK and a channel report message, and then input to the decoder 1336 and decoder 1338, respectively. Measurement information 1335 and ACK / NACK 1339 are recovered. The decoder 1336 and the decoder 1338 are defined as decoders having a decoding function for code and repetitive transmission in the same manner used by the UE.

A switch 1352 connected to the channel estimator 1313 and a switch 1352 connected to the channel estimator 1334 to enable separate channel estimation for the S_UL_DPCCH according to whether the terminal is located in a cell overlap region. ) To change the channel estimation value input to the multiplier 1333. That is, when the UE is not located in the cell overlap region, the channel estimate value of the S-UL-DPCCH may be corrected using the channel estimate value using the pilot field of the UL_DPCCH. When the UE is located in the cell overlap region, it plays a role of performing channel correction on the S-UL-DPCCH using a channel estimation value using the pilot field of the S-UL-DPCCH. Although the S-UL-DPCCH HS-Pilot is measured separately and the channel correction is performed even though the power control for the channel is not performed while the S-UL-DPCCH is transmitted, the performance of the S-UL-DPCCH will be improved. Could be.

14 is a diagram illustrating an operation flow of a terminal controller according to a second embodiment of the present invention.

Referring to FIG. 14, in step 1401, a terminal receives a TPC command from a base station. In step 1402, the UE interprets the TPC and determines transmission power for UL_DPCCH and S_UL_DPCCH, which are reverse channels, in step 1403. In general, the transmit power of the S_UL_DPCCH will be determined as a ratio to the transmit power of the UL_DPCCH. If it is determined that the transmission time of the S_UL_DPCCH in step 1404, and generates a pilot signal for the S_UL_DPCCH and P_UL_DPCCH in step 1407. In step 1408, the UL_DPCCH and the corresponding UL-DPDCH are transmitted using the transmission power determined in step 1403, and the S_UL_DPCCH is transmitted using the transmission power determined in step 1403. If it is determined in step 1404 that it is not the transmission time of the S_UL_DPCCH may be the next process. In step 1404, a pilot signal for UL_DPCCH is generated, and in step 1406, P_UL_DPCCH and a corresponding UL_DPDCH are transmitted at the transmission power determined in step 1403.

In step 1409, it is determined whether the UE is out of the cell overlap region or whether the UE is located in the cell overlap region but there is no more HS-DSCH to receive. If it is determined that the HS-DSCH is out of the cell overlap region or there is no more reception, in step 1410, S_UL_DPCCH and UL_DPCCH not including the HS-Pilot are transmitted to perform normal channel compensation for the reverse dedicated channel. If the soft handover is not terminated in step 1410 or there is more HS-DSCH to be received in the cell overlap region, the process is repeated from step 1401.

15 is an example of an algorithm of a base station controller according to the second embodiment of the present invention.

Referring to FIG. 15, in step 1500, the base station determines whether a UE receiving an HS-DSCH from the base station is in a cell overlap region. The determination of whether the UE is in the cell overlap area is to allow the UE to communicate with other base stations in the cell overlap area after receiving information about the size of signals of other base stations measured by the UE. Since it is controlled by the base station, it can be sufficiently determined by the base station. In step 1501, the base station receives a pilot field of UL_DPCCH, a TPC command, and a pilot field of S-UL-DPCCH from the UE. In step 1501, when the base station receives the S-UL_DPCCH from the reverse direction, the structure of the S-UL-DPCCH when the UE is located in the cell overlap region and when the UE is not located in the cell overlap region may be different. That is, when the UE is not located in the cell overlap region, since the base station transmitting and receiving with the UE is only one base station transmitting the HS-DSCH, the UE may perform S-UL for controlling transmission power of the S-UL-DPCCH. No need to send pilot information to DPCCH. Therefore, when the UE is not located in the cell overlap region, the form of the S-UL-DPCCH may be possible without the pilot field in various forms shown in FIGS. 8A to 8D. Alternatively, the structure of the S_UL_DPCCH may have the same structure regardless of whether the UE is located in a cell overlap region.

In step 1502, the base station determines whether the pilot field of S_UL_DPCCH is correctly received. If it is concluded that the pilot field of the S-UL-DPCCH has not been received in step 1502, the pilot field of the UL_DPCCH is interpreted in step 1509 to generate a TPC command to be applied to the UL_DPCCH in step 1510.

If the base station confirms reception of the S_UL_DPCCH pilot field in step 1502, the pilot field analysis of P_UL_DPCCH and the pilot field of S_UL_DPCCH are interpreted in step 1503. In step 1503, the pilot field of the UL_DPCCH is interpreted to generate a TPC command to be applied to the UL_DPCCH, and used for channel estimation for the UL_DPCCH and UL_DPDCH reverse channels. The pilot of S_UL_DPCCH is used for channel estimation for channel compensation of S_UL_DPCCH. If a channel is estimated from each pilot received from the UL_DPCCH and S_UL_DPCCH, channel compensation for each channel is performed in step 1503.

In step 1504, the TPC command is generated from the UL_DPCCH pilot in step 1503. In step 1506, the downlink transmission power is determined according to the forward power control command received in step 1501. Thereafter, the base station transmits a corresponding TPC command together with other downlink signals transmitted from the base station to the UE.

In step 1507, it is determined whether the UE communicating with the base station is out of the cell overlap region or whether the transmission of the HS-DSCH to the UE is completed. If the UE is out of the cell overlap region or the HS-DSCH transmission to the UE is completed, in step 1508, the normal channel compensation algorithm for the reverse dedicated channel using only the pilot of the UL_DPCCH channel is performed. .

According to the present invention, in the reverse power control method of a base station and a mobile station communicating using HSDPA, a reverse power control is performed on a reverse dedicated physical channel for a conventional forward dedicated channel and a secondary reverse dedicated physical control channel for transmitting reverse control information of HSDPA. To perform them separately. Accordingly, an apparatus and method for correctly receiving the secondary reverse dedicated physical control channel at the base station receiving the secondary reverse dedicated physical control channel have been proposed. In the method for channel compensation or power control of the reverse dedicated physical channel and the secondary reverse dedicated physical control channel separately, a pilot field is introduced to a secondary reverse dedicated physical control channel, and the base station transmits the reverse dedicated physical channel and the secondary reverse dedicated channel. An apparatus and method for separately generating a channel compensation value or a power control command for a physical control channel are presented.

Claims (32)

delete delete delete delete delete delete Dedicated data and high-speed packet data through the high-speed data sharing channel are simultaneously serviced through the forward dedicated physical channel from the first base station, and dedicated data through the forward dedicated physical channel is provided from at least one second base station adjacent to the first base station. When there is a mobile terminal in the soft handover area, the dedicated data is transmitted from the mobile terminal to the first base station and the second base station through a reverse dedicated data channel and the dedicated data is received through a first reverse dedicated control channel. Control information including pilot bit information and transmission power control information required for transmission is transmitted, and confirmation information indicating whether the high-speed packet data is received through a second reverse dedicated control channel, and a forward direction between the first base station and the mobile terminal. Code Division Multiple Access for Transmitting Channel Status Information In a communication system, a method in which the mobile station performs power control of the second uplink dedicated control channel separate from the power control for the first uplink dedicated control channel, The second reverse dedicated control channel has a subframe consisting of three slots, the process of allocating and transmitting pilot bit information to at least one of the slots; Receiving transmission power control information corresponding to the pilot bit information from the first base station through the forward dedicated physical channel, and controlling transmission power for the second reverse dedicated control channel by the transmission power control information; The method characterized in that it comprises a. The transmission power control information of claim 7, wherein the transmission power control information is received at a predetermined transmission time point, and transmission power control information corresponding to pilot bit information transmitted through the first reverse dedicated control channel is transmitted at a transmission time other than the transmission time point. Receiving said method. 8. The method as claimed in claim 7, wherein the pilot bit information transmitted through the second reverse dedicated control channel is discontinuously transmitted when the mobile station is not in a soft handover region. 8. The method of claim 7, wherein the transmission power for the second reverse dedicated control channel when the transmission power for the second reverse dedicated control channel controlled by the transmission power control information exceeds a predetermined threshold. Said method as determined by the value. The method as claimed in claim 7, wherein the pilot bit information is transmitted between the acknowledgment information and the forward channel state information in the subframe. The method as claimed in claim 7, wherein the pilot bit information is transmitted in a last predetermined period of a previous subframe of the subframe in which the acknowledgment information and the forward channel information are transmitted. The method as claimed in claim 7, wherein the pilot bit information is transmitted in priority over the acknowledgment information and the forward channel state information in the subframe. Dedicated data and high-speed packet data through the high-speed data sharing channel are simultaneously serviced through the forward dedicated physical channel from the first base station, and dedicated data through the forward dedicated physical channel is provided from at least one second base station adjacent to the first base station. When there is a mobile terminal in the soft handover area, the dedicated data is transmitted from the mobile terminal to the first base station and the second base station through a reverse dedicated data channel and the dedicated data is received through a first reverse dedicated control channel. Control information including pilot bit information and transmission power control information required for transmission is transmitted, and confirmation information indicating whether the high-speed packet data is received through a second reverse dedicated control channel, and a forward direction between the first base station and the mobile terminal. Code Division Multiple Access for Transmitting Channel Status Information In a communication system, a method of the first base station performs a power control for the first uplink dedicated control channel, the second uplink dedicated control channel separate from the power control, The secondary reverse dedicated control channel has a subframe consisting of three slots, and controls power of the secondary reverse dedicated control channel in response to pilot bit information transmitted through at least one of the slots. Generating second transmission power control information for; And transmitting the second transmission power control information through the forward dedicated physical channel at the time of transmission of the second transmission power control information. 15. The method of claim 14, wherein the first transmission power control information for power control of the first reverse dedicated control channel is generated in response to pilot bit information transmitted through the first reverse dedicated control channel, and the second And transmitting the first transmission power control information through the forward dedicated physical channel at a transmission time other than the transmission time of the transmission power control information. The method as claimed in claim 15, wherein the forward transmission physical channel is controlled by transmission power control information transmitted through the first reverse dedicated control channel. 15. The method of claim 14, wherein the pilot bit information is transmitted between the acknowledgment information and the forward channel state information when the pilot bit information is transmitted through the subframe. The method as claimed in claim 14, wherein the pilot bit information is transmitted in the last predetermined period of the previous subframe of the subframe in which the confirmation information and the forward channel information are transmitted. The method as claimed in claim 14, wherein the pilot bit information is transmitted in preference to the confirmation information and the forward channel state information when the pilot bit information is transmitted through the subframe. Dedicated data and high-speed packet data through the high-speed data sharing channel are simultaneously serviced through the forward dedicated physical channel from the first base station, and dedicated data through the forward dedicated physical channel is provided from at least one second base station adjacent to the first base station. When there is a mobile terminal in the soft handover area, the dedicated data is transmitted from the mobile terminal to the first base station and the second base station through a reverse dedicated data channel and the dedicated data is received through a first reverse dedicated control channel. Control information including pilot bit information and transmission power control information required for transmission is transmitted, and confirmation information indicating whether the high-speed packet data is received through a second reverse dedicated control channel, and a forward direction between the first base station and the mobile terminal. Code Division Multiple Access for Transmitting Channel Status Information In the communication system, an apparatus for the mobile terminal performs the power control for the first uplink dedicated control channel, the second uplink dedicated control channel separate from the power control, The secondary reverse dedicated control channel has a subframe consisting of three slots, and a transmitter for allocating and transmitting pilot bit information to at least one of the slots; Receiving transmission power control information corresponding to the pilot bit information from the first base station through the forward dedicated physical channel, and controlling transmission power for the second reverse dedicated control channel by the transmission power control information; Said device comprising a device. 21. The apparatus of claim 20, wherein the receiving device receives the transmission power control information at a predetermined transmission time point and transmits corresponding to the pilot bit information transmitted through the first reverse dedicated control channel at transmission points other than the transmission time point. And receiving power control information. 21. The apparatus as claimed in claim 20, wherein the transmitting apparatus discontinuously processes the pilot bit information transmitted through the second reverse dedicated control channel when the mobile terminal is not in a soft handover region. 21. The apparatus of claim 20, wherein the transmitting device transmits power for the second reverse dedicated control channel when the transmit power for the second reverse dedicated control channel controlled by the transmit power control information exceeds a predetermined threshold. The apparatus as claimed in claim 2, wherein the predetermined threshold is determined. 21. The apparatus of claim 20, wherein the transmitting device transmits the pilot bit information between the confirmation information and the forward channel state information in transmitting the subframe. The apparatus as claimed in claim 20, wherein the transmitter transmits the pilot bit information in a last predetermined period of a previous subframe of the subframe in which the confirmation information and the forward channel information are transmitted. 21. The apparatus of claim 20, wherein the transmitting device transmits the pilot bit information in preference to the confirmation information and the forward channel state information in transmitting the subframe. Dedicated data and high-speed packet data through the high-speed data sharing channel are simultaneously serviced through the forward dedicated physical channel from the first base station, and dedicated data through the forward dedicated physical channel is provided from at least one second base station adjacent to the first base station. When there is a mobile terminal in the soft handover area, the dedicated data is transmitted from the mobile terminal to the first base station and the second base station through a reverse dedicated data channel and the dedicated data is received through a first reverse dedicated control channel. Control information including pilot bit information and transmission power control information required for transmission is transmitted, and confirmation information indicating whether the high-speed packet data is received through a second reverse dedicated control channel, and a forward direction between the first base station and the mobile terminal. Code Division Multiple Access for Transmitting Channel Status Information In the communication system, wherein said first base station performs power control of the second uplink dedicated control channel separate from the power control for the first uplink dedicated control channel, The secondary reverse dedicated control channel has a subframe consisting of three slots, the receiving apparatus for obtaining a second channel estimation result in response to pilot bit information transmitted through at least one of the slots; Generate second transmission power control information for power control of the second reverse dedicated control channel based on the second channel estimation result, and generate the second transmission power control information at the time point of transmitting the second transmission power control information. And a transmitting device for transmitting through the forward dedicated physical channel. 28. The apparatus of claim 27, wherein the receiving apparatus obtains a first channel estimation result corresponding to pilot bit information transmitted through the first reverse dedicated channel, and the transmitting apparatus obtains the first channel estimation result based on the first channel estimation result. Generate first transmission power control information for power control of a first reverse dedicated control channel, and transmit the first transmission power control information to the forward dedicated physical channel at a transmission time other than a transmission time of the second transmission power control information. The device, characterized in that for transmitting through. 28. The apparatus as claimed in claim 27, wherein the transmitting device controls the forward transmission physical channel by transmission power control information transmitted through the first reverse dedicated control channel. 28. The apparatus of claim 27, wherein the pilot bit information is transmitted between the acknowledgment information and the forward channel state information when the pilot bit information is transmitted through the subframe. The apparatus as claimed in claim 27, wherein the pilot bit information is transmitted in a last predetermined period of a previous subframe of the subframe in which the confirmation information and the forward channel information are transmitted. 28. The apparatus of claim 27, wherein the pilot bit information is transmitted in preference to the confirmation information and the forward channel state information when the pilot bit information is transmitted through the subframe.

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