KR101084149B1 - Transmission power control apparatus in wireless communication system and method thereof - Google Patents

Abstract

The present invention provides an apparatus and method for separately controlling the transmit power of an R-CQICH (reverse-channel status indication channel) and an R-ACKCH (reverse-acknowledgement channel). The present invention receives a first parameter corresponding to the R-CQICH and a second parameter corresponding to the R-ACKCH through an overhead message from the base station, and uses the first and second parameters to determine the R-CQICH and R-ACKCH. Separately determining the transmit power.

R-CQICH, R-ACKCH, overhead message, transmit power, separate control

Description

Transmission power control apparatus and method thereof of a wireless communication system {TRANSMISSION POWER CONTROL APPARATUS IN WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF}

The present invention relates to a power control method applied to a mobile communication system, and more particularly, to an apparatus and method for controlling transmission power using a reverse channel state indicator and an acknowledgment indicator.

In wireless communication, the channel environment changes with the movement of the location of the mobile terminal. Therefore, it is desirable that the modulation and coding scheme be changed for each position to match the channel state.

For modulation schemes, when channel conditions are good (i.e., when there is little interference), the communication system performs modulation that enables high-speed data transfer such as Quadrature Amplitude Modulation (QAM) and M-ary Phase Shift Keying (PSK). Can be used. However, in the case of poor channel conditions, modulation such as Binary Phase Shift Key (BPSK) resistant to interference can be used.

For setting the coding scheme, code redundancy can be reduced when the channel condition is good (and therefore high coding rate), and thus data can be transmitted with a higher data rate. However, when the channel environment is poor, channel coding is performed with more code additions (lower coding rates) so that data can be transmitted at lower data rates.

In order to appropriately change the modulation and coding scheme according to the change in the channel state, information on the current channel state is required. The forward channel state is measured by the mobile terminal and transmitted to the base station through the reverse channel state indication channel (R-CQICH). The term reverse channel refers to communication that originates from a mobile terminal and is transmitted to a network, such as a base station.

Hybrid-Automatic Repeat Request (H-ARQ) is a method of improving reliability and data throughput by combining Automatic Repeat Request (ARQ) and Forward Error Correction (FEC). ARQ is a method of improving transmission reliability by requiring retransmission of the same information until error-free information is received when there is an error in the transmitted information. FEC is also a method of improving reliability by correcting errors that occur during transmission.

During good channel conditions, the error frequency in the received information is low. Thus, retransmission is requested using ARQ, so that the reliability of the received information can be maintained. However, during poor channel conditions, the error frequency in the received information is high. If ARQ is used without FEC, the number of retransmissions may be increased. Thus, the data throughput of the system is reduced because ARQ does not have any error-correction function.

Since such problem can be solved by FEC, H-ARQ system using ARQ and FEC has been proposed. As a kind of H-ARQ, there is an incremental redundancey (IR) system. In this IR scheme, the transmitting side initially transmits data encoded at a high coding rate with a small amount of extra bits. If the receiving side receives data with an error, it requests retransmission. In response to this request, the sender sends an additional append bit encoded at a low rate.

The receiving side combines to decode the already received data and spare bits. In doing so, the retransmitted bits compensate for packets that have already been sent.

In a HARQ system of a wireless communication system, a mobile terminal decodes a received packet to check for an error and feed back an acknowledgment (ACK) or negative acknowledgment (NAK) signal to a base station according to a check result. The base station with the received NAK signal retransmits the packet. By combining to decode the retransmitted packet and the initially transmitted packet, the mobile terminal has diversity or coding gain. The ACK / NAK signal transmitted from the mobile station to the base station is transmitted to the base station through a reverse acknowledgment channel (R-ACKCH).

In a typical wireless communication system, the nominal attribute gain for the R-ACKCH is set to -3 dB. During execution, it was determined that this gain was set too low for proper ACK operation. In other words, the current nominal attribute gain for R-ACKCH is too high for false alarm probability (the likelihood that the base station receiver detects an ACK even when the transmitter is transmitting nothing on the R-ACKCH) resulting in a significant number of RLP retransmissions.

To confirm this problem, a simulation was performed with the current nominal tuning gain for R-ACKCH under AWGN channel. This simulation was performed with 9600bps R-FCH at the top of the R-ACKCH. The pilot level was power controlled so that 1% FER could be performed for R-FCH.

In Fig. 1, line 2 indicates the CDF of the demodulator output when the ACK signal is transmitted. Line 4 is the complementary CDF of the demodulator that is output when the transmitter transmits nothing. Line 6 is the complementary CDF of the demodulator output when the NAK signal is transmitted.

For convenience of explanation, the following possibilities may be defined.

P _AN : The likelihood that the ACK signal will be detected incorrectly as a NAK.

P _NA : Possibility of NAK signal to be falsely detected as ACK.

P _No-A : The likelihood that the receiver will detect the ACK signal even when the mobile station transmits nothing on the R-ACKCH.

In this example, one threshold is given at the output of the base station demodulator to ensure that the base station detects an ACK or NAK. It can be seen that the 'no signal' does not need to be differentiated from the 'NAK' because the base station operation may be the same in these two cases. The criterion used to determine the threshold level is to keep P _AN and P _NA below a certain level. This level should be chosen according to the implementation. However, a P _AN of 0.01 may be a reasonable choice. In Figure 1, for this threshold P _NA is 0.001, which seems very reasonable. However, P _No-A is 0.3, which shows that one bit is high for proper operation. High P _No-A can cause some error results.

The error result due to this false alarm in the R-ACKCH can be described as follows. When the mobile terminal completely misses a given forward packet data control channel, the mobile terminal does not transmit any signal on the R-ACKCH. In about 30% of these situations, the base station erroneously determines that the ACK signal was sent from the mobile terminal and proceeds to a new packet for that ARQ channel, eventually causing an RLP layer retransmission for that packet. Therefore, the channel gain (ie, transmit power) for the R-ACKCH needs to be modified to solve this problem.

The transmit power of the R-CQICH is determined using the R-CQICH power adjustment gain and the R-ACKCQICH gain for the pilot power (RLGAIN_ACKCQICH_PILOT). The R-CQICH power adjustment gain is transmitted separately from the base station to each mobile terminal. In addition, the R-ACKCQICH gain for pilot power is commonly transmitted from the base station to all mobile terminals.

Similarly, the transmit power of the R-ACKCH is determined using the R-ACKCH power adjustment gain and the R-ACKCQICH gain (RLGAIN_ACKCQICH_PILOT) for the pilot power. The R-ACKCH power adjustment gain is transmitted separately from the base station to each mobile terminal. In addition, the R-ACKCQICH gain for pilot power is commonly transmitted from the base station to all mobile terminals.

As mentioned in the foregoing description, in determining each of the R-CQICH and R-ACKCH transmit power, the R-ACKCQICH gain (RLGAIN_ACKCQICH_PILOT) for pilot power is commonly used. However, since the common factor (RLGAIN_ACKCQICH_PILOT) is used to determine the R-CQICH and R-ACKCH transmit power, the following problems are indispensable.

For all mobile terminals in the cell, the transmit power of the R-ACKCH needs to be increased but the transmit power of the R-CQICH may need to be maintained. In such a case, the R-ACKCH power adjustment gain must be transmitted to every mobile terminal in the cell individually.

This is because when the R-ACKCQICH gain (RLGAIN_ACKCQICH_PILOT) for the pilot power is transmitted to all mobile terminals in the cell using the overhead message, the transmit power of the R-ACKCH as well as the transmit power of the R-ACKCH are increased.

For example, in ACK / NAK detection, the base station performs threshold detection using the received power of the R-ACKCH. Thus, if the transmit power of the R-ACKCH is too small, the base station may incorrectly detect the No-signal as a NAK. If the R-ACKCQICH gain (RLGAIN_ACKCQICH_PILOT) for the pilot power is transmitted to all mobile terminals to solve the above problem, the transmit power of the R-CQICH is unnecessarily increased and becomes inefficient. When the base station transmits the R-ACKCH power adjustment gain to each of the mobile terminals, the message load transmitted to the mobile terminal increases, and the corresponding transmission process becomes very complicated.

Accordingly, the present invention provides a method for controlling transmit power of R-CQICH (reverse-channel status indication channel) and R-ACKCH (reverse-acknowledgement channel) which substantially avoids one or more problems caused by the limitations and disadvantages of the related invention. It is about.

One object of the present invention is to provide an apparatus and method for independently controlling the transmit power of an R-CQICH (reverse-channel status indication channel) and an R-ACKCH (reverse-acknowledgement channel).

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows, and in part will be obvious to those skilled in the art upon examination of the section, or may be learned by practice of the invention. The objects and other advantages of the present invention can be understood and appreciated by the structure particularly pointed out in the written description and claims as well as the accompanying drawings.

As embodied and broadly described herein, a method of controlling transmit power in a mobile communication system for achieving the above and other advantages and in accordance with the object of the present invention is to receive packet data from a network and verify that the packet data is received correctly. Determining a value, receiving a first gain value (e.g., RLGAIN_ACKCH_PILOT) and a second gain value (e.g., RLGAIN_CQICH_PILOT) from the network, and at least a nominal reverse acknowledgment channel attribute gain and the first gain. Determining the acknowledgment channel power by using the value. Wherein the first gain value is associated with control transmission power for transmitting data acknowledgment information (ACK), and the second gain value is control transmission power for transmitting channel state information separate from the first gain value. And the first and second gain values may be received by a plurality of mobile terminals associated with the network.

According to one aspect of the invention, the method further comprises determining channel state indication channel power by using at least a nominal reverse channel state indication channel attribute gain and the second gain value.

According to another feature of the invention, at least one of the first gain value and the second gain value is received via an overhead message from the network, the overhead message being at least one controlled by the network. It may be received by a mobile terminal in a cell. Preferably, the overhead message includes at least one of an Extended System Parameters Message (ESPM) and an MC-RR Parameters Message (MCRRPM). The first and second gain values are transmitted using at least one of a universal handoff direction message (UHDM) and an extended channel assignment message (ECAM).

According to another feature of the invention, the acknowledgment channel power is determined by

Acknowledgment channel power = mean pilot channel output power + Y

* (Nominal_Reverse_Acknowledgement_Channel_Attribute_Gain

+ Reverse_Channel_Adjustment_Gain for an acknowledgment channel

-Multiple_Channel_Adjustment_Gain for the acknowledgment channel

+ first gain value),

Here, the average pilot channel output power is the average power value of the reverse pilot channel, Y is a constant, Nominal_Reverse_Acknowledgement_Channel_Attribute_Gain is a gain value already known to the network and the mobile terminal, and Reverse_Channel_Adjustment_Gain is a signal that the network notifies each mobile terminal through a message. A gain value, Multiple_Channel_Adjustment_Gain is a gain value used when at least two code channels are assigned to the mobile terminal as well as the reverse pilot channel, and the Y value is preferably 0.125.

According to one aspect of the invention, the method further includes determining channel state indication channel power by using at least a nominal reverse channel state indication channel attribute gain and a second gain value.

According to another feature of the invention, the channel state indication channel power is determined by

Channel Status Indication Channel Power = mean pilot channel output power + Y

* (Nominal_Reverse_Channel_Quality_Indicator_Channel_Attribute_Gain

+ Reverse_Channel_Quality_Indicator_Channel_Attribute_Adjustment_Gain

+ Reverse_Channel_Adjustment_Gain for a channel quality indicator channel

-Multiple_Channel_Adjustment_Gain for the channel quality indicator channel + second gain value),

Where mean pilot channel output power is the average power of the reverse pilot channel, Y is a constant,

Nominal_Reverse_Channel_Quality_Indicator_Channel_Attribute_Gain is a gain value already known to the network and the mobile terminal,

Reverse_Channel_Quality_Indicator_Channel_Attribute_Adjustment_Gain is a gain value that the network informs each mobile terminal through a message,

Reverse_Channel_Adjustment_Gain is a gain value that the network informs each terminal through a message,

Multiple_Channel_Adjustment_Gain is a gain value used when at least two code channels are assigned to the mobile terminal as well as the reverse pilot channel. The Y value is preferably 0.125.

The mobile terminal for controlling the transmission power of the mobile communication system comprises: means for receiving packet data from a network and determining whether the packet data is received correctly; means for receiving a first gain value and a second gain value from the network; Means for determining acknowledgment channel power by using at least a nominal reverse acknowledgment channel attribute gain and the first gain value. Wherein the first gain value is associated with control transmission power for transmitting data acknowledgment information, and the second gain value is associated with control transmission power for transmitting channel state information separate from the first gain value. The first and second gain values may be received by a plurality of mobile terminals associated with the network.

According to yet another embodiment of the present invention, a method for controlling transmit power includes transmitting packet data to a mobile terminal, transmitting a first gain value and a second gain value to the mobile terminal, and at least a nominal reverse acknowledgment. Receiving the data acknowledgment information from the mobile terminal via an acknowledgment channel transmitted at an acknowledgment channel power determined by the mobile terminal using the channel attribute gain and the first gain value. Wherein the first gain value is associated with control transmit power for transmitting data acknowledgment information, and the second gain value is associated with control transmit power for transmitting channel state information separate from the first gain value. The first and second gain values may be received by a plurality of mobile terminals associated with the network.

According to one aspect of the invention, the network is capable of providing a channel state indication channel transmitted by the mobile terminal having a channel state indication channel power determined using at least a nominal reverse channel state indication channel attribute gain and the second gain value. And receiving a channel status indication via.

Therefore, the present invention can effectively control the transmission power of the R-CQICH and the R-ACKCH. The present invention also reduces the overhead messages transmitted from the base station to the mobile terminal.

The foregoing general description and the following detailed description of the invention are exemplary and are intended to provide further description of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the present disclosure, are intended to explain the principles of the invention and, together with the description, to provide a better understanding of the invention. In the drawings,

Figure 1 is a simulation result with R-ACKCH nominal attribute of -3dB.

2 is a flowchart of a transmission power control method of R-CQICH.

3 is a flowchart of a method of controlling transmit power of an R-ACKCH.

4 is an exemplary diagram of an overhead message format including RLGAIN_CQICH_PILOT and RLGAIN_ACKCH_PILOT values.

5 illustrates a mobile communication device according to an embodiment of the present invention.

Reference is made in detail to preferred embodiments of the invention, which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like parts. Although the present invention has been illustrated with respect to a mobile terminal, the present invention is deemed to be applicable to the present invention whenever it is required to provide a new delivery configuration for establishing a connection between a mobile communication device and a network (also called a base station).

2 is a flowchart of a transmission power control method for R-CQICH. Referring to FIG. 2, the mobile terminal receives a signal transmitted from the base station S11 and measures the current forward channel state (S12). In addition, the mobile terminal calculates the R-CQICH transmission power using the CQICH power gain for the reverse pilot power value RLGAIN_CQICH_PILOT received from the base station (S13, S14). It can be seen that step S12 of measuring the current forward channel state and step S13 of receiving RLGAIN_CQICH_PILOT from the base station can be interchanged.

Preferably, the transmit power of the R-CQICH is calculated using Equation 1.

P _RCQICH = mean pilot channel output power + 0.125

* (Nominal_Reverse_Channel_Quality_Indicator_Channel_Attribute_Gain

+ Reverse_Channel_Quality_Indicator_Channel_Attribute_Adjustment_Gain

+ Reverse_Channel_Adjustment_Gain [R-CQICH]

Multiple_Channel_Adjustment_Gain [R-CQICH] + RLGAIN_CQICH_PILOT).

In Equation 1, the average pilot channel output power is an average power value of a reverse pilot channel, and Nominal_Reverse_Channel_Quality_Indicator_Channel_Attribute_Gain is a gain value already known to the base station and the mobile terminal,

Reverse_Channel_Quality_Indicator_Channel_Attribute_Adjustment_Gain is a gain value that the base station notifies each mobile terminal of a message if necessary,

Reverse_Channel_Adjustment_Gain [R-CQICH] is a gain value that the base station notifies each terminal through a message if necessary.

Multiple_Channel_Adjustment_Gain [R-CQICH] is a gain value used when at least two code channels are assigned to the mobile terminal as well as the reverse pilot channel, and RLGAIN_CQICH_PILOT is a reverse direction in which the base station informs all mobile terminals in the cell via an overhead message. The gain of the R-CQICH power over the pilot channel power.

3 is a flowchart of a transmission power control method for an R-ACKCH. Referring to Fig. 3, data is preferably transmitted at a high data rate between the base station and the mobile terminal in the following manner.

The base station sends a packet to the mobile terminal. In addition, the mobile terminal having the received packet S21 performs decoding thereon (S22).

If the decoding succeeds (S22) (ie, there is no error in the decoded data), the mobile terminal sends an acknowledgment (ACK) signal to the base station to inform successful decoding. The base station with the received ACK signal transmits the next packet.

If the decoding fails (S22), the mobile terminal sends a non-acknowledge (NAK) signal to the base station to inform the decoding failure (S25). The base station with the received NAK signal retransmits the packet.

The ACK / NAK signal is transmitted on the R-ACKCH. The transmit power of the R-ACKCH is calculated using the ACKCH power gain for the reverse pilot power value RLGAIN_ACKCH_PILOT received from the base station (S23, S24). The ACK / NAK signal is transmitted to the base station at the calculated transmission power (S25).

Preferably, the transmit power of the R-ACKCH is calculated using Equation 2.

P _ACKCH = mean pilot channel output power + 0.125

* (Nominal_Reverse_Acknowledgement_Channel_Attribute_Gain

+ Reverse_Channel_Adjustment_Gain [R-ACKCH]

Multiple_Channel_Adjustment_Gain [R-ACKCH] + RLGAIN_ACKCH_PILOT).

In Equation 2, the average pilot channel output power is the average power value of the reverse pilot channel, Nominal_Reverse_Acknowledgement_Channel_Attribute_Gain is a gain value already known to the base station and the mobile terminal, and Reverse_Channel_Adjustment_Gain [R-ACKCH], if necessary, indicates that each base station moves through a message. Gain value to inform the terminal,

Multiple_Channel_Adjustment_Gain [R-ACKCH] is a gain value used when at least two code channels are assigned to the mobile terminal as well as the reverse pilot channel.

RLGAIN_ACKCH_PILOT is a gain value of the R-ACKCH power for the reverse pilot channel power that the base station informs all mobile terminals in the cell through an overhead message.

4 is an exemplary diagram of an overhead message format including RLGAIN_CQICH_PILOT and RLGAIN_ACKCH_PILOT values. Such a message is sent from a base station residing in a cell controlled by such a base station to a mobile station.

Referring to FIG. 4, the RLGAIN_CQICH_PILOT and RLGAIN_ACKCH_PILOT values for calculating the transmit power of the R-CQICH and the R-ACKCH are, respectively, Extended Systme Parameters Message (ESPM), MC-RR Parameters Message (MCRRPM), and Universal Handoff Direction (UDMM). Message) and ECAM (Extended Channel Assignment Message) may be transmitted using one or more fields. ESPM and MCRRPM are common channel messages provided to a plurality of mobile terminals in a cell. On the other hand, UHDM and ECAM are dedicated messages provided to specific mobile terminals in a cell.

Therefore, the present invention efficiently controls the transmit power of each of the R-CQICH and the R-ACKCH. In addition, the present invention reduces the amount of data transmitted from the base station to the mobile terminal.

Referring to Fig. 5, a block diagram of a mobile communication device 400 of the present invention is shown, for example a mobile phone for carrying out the method of the present invention. The mobile communication device 400 includes a processing device 410 such as a microprocessor or digital signal processor, an RF module 435, a power management module 405, an antenna 440, a battery 455, a display 415, a keypad. 420, flash memory, ROM, or storage device 430, such as SRAM, speaker 445, microphone 450, and, optionally, SIM card 425.

The user enters indication information such as a telephone number, for example, by pressing a button on the keypad 420 or by voice activation using the microphone 450. The processing device 410 receives and processes the indication information in order to perform an appropriate function such as dialing a telephone number. The operation data may be retrieved to the storage device 430 to perform the function. In addition, the processing device 410 may display instructions and operation information on the display 415 for the user's reference and convenience.

The processing device 410 sends the indication information to the RF section 435 to initialize the communication, for example by transmitting a radio signal containing voice communication data. RF module 435 includes a receiver and a transmitter for receiving and transmitting wireless signals. Antenna 440 facilitates the transmission and reception of wireless signals. Upon receiving the wireless signal, the RF module 435 may forward and convert the signal to baseband frequency for processing by the processing device 410. The processed signal may be converted into an audible or readable information output, for example, via speaker 445.

Those skilled in the art will appreciate that the steps described in Figures 2-4 can be readily performed, for example, using processing unit 410 or other data or digital processing unit, alone or in combination with external support logic. .

Although the present invention has been described based on mobile communication, the present invention may be used in any wireless communication system using a mobile device, such as a PDA and a laptop computer with a wireless communication function. Moreover, using any terminology to describe the invention should not limit the scope of the invention to any kind of wireless communication system, such as CDMA. The invention may also be applied to other wireless communication systems using different air interfaces and / or physical layers, such as, for example, TDMA, FDMA, WCDMA, UMTS, and the like.

Preferred embodiments may be implemented as a method, apparatus or article of manufacture using standard programming and / or engineering techniques to produce software, firmware, hardware, or any combination thereof. As used herein, the term " article of manufacture " refers to code or logic (e.g., integrated circuit chips, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs, etc.), or computer readable media executed in hardware logic. (E.g. magnetic storage media such as hard disk drives, floppy disks, tapes), optical storage devices (CD-ROMs, optical disks, etc.), volatile and nonvolatile memory devices (e.g. EEPROMSs, ROMs, PROMs, RAMs, DRAMs, SRAMs, firmware, programmable logic, etc.)

In computer readable media, code is accessed and executed by a processor. In addition, the code in which the preferred embodiment is executed may be accessed from a file server through a transmission medium or over a network. In such a case, the article of manufacture on which the code is executed may include a transmission medium such as a network transmission line, a wireless transmission medium, a signal propagating through space, a radio wave, an infrared signal, or the like. Of course, one of ordinary skill in the art appreciates that many variations are possible in this configuration without departing from the scope of the present invention, and that the article of manufacture may comprise any information storage medium known in the art.

The logic executions illustrated in the specific operations shown in the figures occur in a specific order. In alternative embodiments, certain logic operations may be performed in a different order, modified or removed, and to implement preferred embodiments of the present invention. Furthermore, steps may be added to the above described logic and these steps may be adapted to embodiments of the invention.

Those skilled in the art will appreciate that many variations and modifications are possible within the present invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (18)

A mobile terminal for controlling transmission power of a mobile communication system, Receiving packet data from a network; And A first gain value associated with power control of an acknowledgment channel for transmission of acknowledgment information for the packet data from the network, power control of a channel state indication channel for transmission of channel state information, and Receiving an associated second gain value; Determining transmission power (acknowledgment channel power) of the acknowledgment channel using the first gain value; Transmitting the acknowledgment channel to the acknowledgment channel power; The mobile terminal determines the acknowledgment channel power by Acknowledgment channel power = mean pilot channel output power + Y * (Nominal_Reverse_Acknowledgement_Channel_Attribute_Gain + Reverse_Channel_Adjustment_Gain for an acknowledgment channel-Multiple_Channel_Adjustment_Gain for the acknowledgment channel + first gain value), Where mean pilot channel output power is an average power value of a reverse pilot channel, Y is a constant, Nominal_Reverse_Acknowledgement_Channel_Attribute_Gain is a gain value already known to the mobile terminal, and Reverse_Channel_Adjustment_Gain is a gain value that the network informs each mobile terminal through a message. Multiple_Channel_Adjustment_Gain is a gain value used when at least two code channels are assigned to the mobile terminal as well as a reverse pilot channel. Transmission power control method. The method of claim 1, Determining a transmission power (channel state indication channel power) of the channel state indication channel by using the second gain value, The mobile terminal determines the channel state indication channel power by Channel status indicator channel power = mean pilot channel output power + Y * Where mean pilot channel output power is an average power value of a reverse pilot channel, Y is a constant, Nominal_Reverse_Channel_Quality_Indicator_Channel_Attribute_Gain is a gain value already known to the mobile terminal, and Reverse_Channel_Quality_Indicator_Channel_Attribute_Adjustment_Gain is a gain value that the network notifies each mobile terminal through a message. Reverse_Channel_Adjustment_Gain is a gain value that the network informs each terminal through a message, and Multiple_Channel_Adjustment_Gain is a gain value used when at least two code channels are assigned to the mobile terminal as well as the reverse pilot channel. Transmission power control method. The method according to claim 1 or 2, The mobile terminal receives at least one of the first gain value and the second gain value via an overhead message, which is transmitted to all mobile terminals in at least one cell controlled by the network. Transmission power control method. The method according to claim 1 or 2, Y is 0.125,  Transmission power control method. In the base station for controlling the transmission power of the mobile communication system, Transmitting packet data to a mobile terminal; And A first gain value associated with power control of an acknowledgment channel for transmission of acknowledgment information for the packet data, and a second gain associated with power control of a channel status indication channel for transmission of channel state information; Transmitting a second gain value to the mobile terminal; And Receiving, from the mobile terminal, an acknowledgment channel transmitted by the mobile terminal to the base station with an acknowledgment channel power determined using the first gain value, The acknowledgment channel power is determined by the mobile terminal according to: Acknowledgment channel power = mean pilot channel output power + Y * (Nominal_Reverse_Acknowledgement_Channel_Attribute_Gain + Reverse_Channel_Adjustment_Gain for an acknowledgment channel-Multiple_Channel_Adjustment_Gain for the acknowledgment channel + first gain value), Where mean pilot channel output power is an average power value of a reverse pilot channel, Y is a constant, and Nominal_Reverse_Acknowledgement_Channel_Attribute_Gain is a gain value already known to the mobile terminal, and Reverse_Channel_Adjustment_Gain [R-ACKCH] is a base station for each movement through a message. A gain value informing the terminal, and Multiple_Channel_Adjustment_Gain is a gain value used when at least two code channels are assigned to the mobile terminal as well as a reverse pilot channel, Transmission power control method. The method of claim 5, Receiving, from the mobile terminal, a channel state indication channel transmitted by the mobile terminal to the base station at a channel state indication channel power determined using the second gain value, The channel state indication channel power is determined by the mobile terminal according to: Channel status indication channel power = mean pilot channel output power + Y * Where mean pilot channel output power is the average power value of the reverse pilot channel, Y is a constant, Nominal_Reverse_Channel_Quality_Indicator_Channel_Attribute_Gain is a gain value already known to the mobile terminal, and Reverse_Channel_Quality_Indicator_Channel_Attribute_Adjustment_Gain is a gain value that the base station informs each mobile terminal through a message. Reverse_Channel_Adjustment_Gain is a gain value that the base station informs each terminal through a message, and Multiple_Channel_Adjustment_Gain is a gain value used when at least two code channels are assigned to the mobile terminal as well as the reverse pilot channel. Transmission power control method. The method according to claim 5 or 6, The base station transmits at least one of the first gain value and the second gain value through an overhead message transmitted to all mobile terminals in at least one cell controlled by the base station. Transmission power control method. The method according to claim 5 or 6, Y is 0.125, Transmission power control method. delete delete delete delete delete delete delete delete delete delete

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