KR20020060823A - Device and method for transmitting and receiving walsh space indicator in a mobile communication system - Google Patents

Abstract

PURPOSE: A Walsh space indicator transmitting and receiving apparatus and method of a mobile communication system are provided to transmit Walsh space information to be assigned to a packet data service variably for every 20 msec by a circuit service in a system which simultaneously performs the packet data service and the circuit service. CONSTITUTION: WSI(Walsh Space Indicator) and bits obtained for other functions are inputted to a frame quality indicator adding unit(111). The frame quality indicator adding unit(111) adds a frame quality indicator to the WSI and the bits and transits them. A tail bit adding unit(112) adds a tale bit to the output of the frame quality indicator adding unit(111) to facilitate a coding operation. An encoder(113) encodes bits output from the tale bit adding unit(112). A symbol repetition/puncturing unit(114) performs a symbol repetition and puncturing process so as to have the same number of coded symbols as the predetermined size of an interleaver. An interleaver(115) interleaves the output of the symbol repetition/puncturing unit(114). A signal point mapping unit(116) maps '0' to '+1' and '1' to '-1' among the output signals of the interleaver(115). An output of the signal pint mapping unit(116) is applied to one input terminal of a time division multiplexer(125) and '0' is inputted to the other input terminal thereof. The time division multiplexer(125) inputs and outputs an output of the signal point mapping unit(116) as long as a slot 'L' to which the WSI has been inputted, and does not performs inputting and outputting of the output of the signal point mapping unit(116) during the remaining slots(16-L). A Walsh cover unit(126) covers an output of the time division multiplexer(126). A gain controller(127) multiplies a signal covered by the Walsh cover unit(126) by a pre-set channel gain and outputs it as a Q channel signal component. An encoder(121) encodes a quality matching indicator. A signal mapping unit(122) maps '0' to '+1' and '1' to '-1' among output signals of the encoder(121). A Walsh cover unit(123) covers an output of the signal mapping unit(122). A gain controller(124) multiplies a signal covered by the Walsh cover unit(123) by a pre-set channel gain and outputs it as an I channel signal component.

Description

Device and method for transmitting and receiving Walsh space indicator in mobile communication system {DEVICE AND METHOD FOR TRANSMITTING AND RECEIVING WALSH SPACE INDICATOR IN A MOBILE COMMUNICATION SYSTEM}

The present invention relates to a mobile communication system, and more particularly, to an apparatus and method for transmitting an error presence or absence of a Walsh space indicator and Walsh space indicator frame in a mobile communication system for simultaneous transmission of high-speed packet data and voice data.

With the rapid development of mobile communication technology, mobile communication service is developing from a method of providing only voice to a method of providing data for video communication and the Internet as well as voice service. For the efficiency of the services, the mobile communication system divides a transport channel into a circuit channel for a voice service and a packet channel for a data service, and performs a service accordingly.

The mobile communication system capable of simultaneously supporting the packet service and the voice service, that is, the mobile communication system in which the packet data and the circuit data exist at the same time, stores the channel power, Walsh code, and time allocated to the system for the packet service and the circuit service, respectively. Use separately. Of these, in the case of Walsh codes assigned for each service, the particular Walsh code allocated for the circuit service is used until the service is terminated. Alternatively, several Walsh codes may be used simultaneously as a specific Walsh code allocated for a packet service, and the number of Walsh codes used may continuously change. At this time, if the number of Walsh codes available for the packet service is reduced by the number of Walsh codes used for the circuit service, the number of Walsh symbols that can be transmitted per unit time is reduced. It may be considered to use Walsh codes of variable length to maximize the use of Walsh codes. In this case, the base station needs to continuously inform the terminal of the Walsh length information and the available Walsh code information (hereinafter, referred to as "walsh space information") used for the packet service at regular intervals.

On the other hand, if an error of Walsh space information received by the terminal occurs, even if a lot of power is allocated, an error occurs in the packet bit according to the packet data decoding result. As a result, the performance of the mobile communication system is reduced. Therefore, when an error occurs in the Walsh space information received from the terminal it is necessary to inform the base station to receive the service only if the Walsh space information is correctly received.

Accordingly, an object of the present invention is to provide an apparatus and method for transmitting Walsh length information to be used in a mobile communication system that simultaneously supports packet service and voice service, and information representing Walsh codes usable accordingly.

Another object of the present invention is to provide an apparatus and method for transmitting Walsh space information in a mobile communication system supporting packet service and voice service at the same time, and detecting an error of the transmitted Walsh space information.

Another object of the present invention is to provide an apparatus and method for transmitting information indicating the presence or absence of errors in Walsh space information in a mobile communication system supporting packet service and voice service simultaneously.

According to an embodiment of the present invention, a length of a Walsh code for a packet service is variable according to a Walsh code allocated for the voice service in a predetermined frame unit in a mobile communication system that simultaneously supports a voice service and a packet service. And a base station for transmitting to the terminal Walsh space information that is determined and indicates the length of the determined Walsh code and the available Walsh code information corresponding to the length.

A base station (forward link transmitting apparatus) according to an embodiment of the present invention includes an encoder that encodes Walsh spatial information and outputs an encoded Walsh spatial information symbol. A symbol repetition / remover is a transmission determined corresponding to the Walsh length. Repeat / remove the Walsh space information symbol according to a parameter (symbol repeat / remove number). The Walsh spreader spreads the output of the symbol repeater / rejector for a predetermined slot within the frame and outputs for transmission. The base station further includes a CRC adding unit for adding a frame performance indicator (CRC) of the number of bits determined corresponding to the Walsh length to the Walsh space information.

According to an embodiment of the present invention, the terminal (reverse link receiving device) includes a demodulator for demodulating the Walsh despread received signal. A sequence adder sequence sums demodulation symbols by the demodulator according to a reception parameter (symbol repetition / removal number) determined corresponding to the Walsh length. The decoder decodes the output of the sequence summer, and outputs the Walsh space information from the decoding result. The decoder determines whether there is an error in the Walsh space information of each frame in accordance with a frame performance indicator (CRC) of the bit number determined corresponding to the Walsh length from the decoding result. The determination result is transmitted to the base station through the reverse ACK channel, the DRQ channel or the SSI channel.

1 is a block diagram of a Walsh space indicator transmission apparatus according to an embodiment of the present invention.

2 is a diagram illustrating a configuration of a Walsh space indicator transmission parameter determiner according to an exemplary embodiment of the present invention.

FIG. 3 is a diagram illustrating a configuration of a base station which performs orthogonal spreading and high frequency (RF) band transition processing to transmit a Walsh space indicator from the Walsh space indicator transmitting apparatus shown in FIG. 1 to a terminal.

4A is a view illustrating an example of a channel structure by the Walsh space indicator transmission device shown in FIG.

4B is a view showing another example of a channel structure by the Walsh space indicator transmission device shown in FIG.

FIG. 5A illustrates parameters used when transmitting a Walsh space indicator for 16 slots in accordance with an embodiment of the present invention. FIG.

FIG. 5B shows parameters used when transmitting a Walsh space indicator during L slot in accordance with another embodiment of the present invention. FIG.

6 is a diagram illustrating a processing flow of a Walsh space indicator transmission operation according to an embodiment of the present invention.

7 is a diagram illustrating a configuration of a terminal for processing baseband frequency transition and band despreading when a Walsh space indicator is transmitted from a base station according to an exemplary embodiment of the present invention.

8 is a diagram illustrating a configuration of an apparatus for receiving a Walsh space indicator and generating an error of a received Walsh space indicator frame according to an embodiment of the present invention.

9 is a view showing the configuration of the Walsh space indicator receiving parameter output unit.

10 is a flowchart illustrating a processing flow of an operation of generating a Walsh space indicator and generating an error of a received Walsh space indicator frame according to an embodiment of the present invention.

FIG. 11 is a diagram illustrating a configuration of an apparatus for transmitting error information of a Walsh space indicator frame according to a first embodiment of the present invention. FIG.

12 is a block diagram of an apparatus for transmitting information on whether an error exists in a Walsh space indicator frame according to a second embodiment of the present invention.

FIG. 13 is a diagram illustrating a configuration of an apparatus for transmitting error information of a Walsh space indicator frame according to a third embodiment of the present invention. FIG.

FIG. 14 is a diagram illustrating a configuration of an apparatus for transmitting error information of a Walsh space indicator frame according to a fourth embodiment of the present invention. FIG.

FIG. 15 is a diagram illustrating a configuration of an apparatus for transmitting error presence information of a Walsh space indicator frame according to a fifth embodiment of the present invention. FIG.

FIG. 16 is a diagram illustrating a configuration of a terminal that performs orthogonal spreading and high frequency transition processing so as to be suitable for transmitting error presence information of Walsh space indicators transmitted by the transmitting apparatuses shown in FIGS. 11 to 15 to a base station.

FIG. 17 illustrates mapping of one of the DRQ symbols transmitted in the backward direction to the error presence information of the Walsh space indicator frame when the reverse DRQ channel is used to transmit error information of the Walsh space indicator frame according to an embodiment of the present invention. Drawing showing relationship.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the same reference numerals and the same elements among the drawings are represented by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram illustrating an apparatus for transmitting a Walsh space indicator in a mobile communication system for high speed packet data transmission according to an exemplary embodiment of the present invention. This Walsh space indicator transmission apparatus corresponds to a configuration for transmitting the Walsh space indicator from the forward link, that is, the base station to the mobile station in the mobile communication system.

Referring to FIG. 1, a Walsh Space Indicator (WSI) is used by a base station to transmit data of a packet channel to a mobile station (MS) located in a sector, and this Walsh. Walsh space information indicating Walsh codes available according to length. The Walsh space indicator is composed of n bits and is transmitted from the base station to the terminal through a common channel together with 1 bit reserved for reverse activity indicator and m bits reserved for use. . The reverse activity indicator is information broadcast by the base station to the terminals to adjust the traffic load of the reverse link. Since the Walsh space indicator is transmitted from the base station to the terminal, the terminal despreads the packet data Walsh symbol to be transmitted on the next 20ms frame boundary using the information contained in the Walsh space indicator.

Bits reserved for other functions than the Walsh space indicator are input to the frame quality indicator adding unit 111. The frame performance indicator adder 111 adds and outputs a frame performance indicator to bits reserved for the other functions than the Walsh space indicator. Since the base station transmits the frame performance indicator attached to the Walsh space indicator, the terminal may know whether or not the received Walsh space indicator has an error, and thus may not use the Walsh space indicator with the error. As the frame performance indicator, a Cyclic Redundancy Code (CRC) may be used and has a different number of bits depending on the Walsh length used. The tail bits adder 112 adds tail bits to the output of the frame performance indicator adder 111 to facilitate subsequent encoding operations. 8 bits of tail bits may be used as the tail bits. The encoder 113 encodes the bits output from the tail bit adding unit 112. As the encoder 113, a convolutional or turbo encoder may be used. The symbol repetition / puncturing 114 performs symbol repetition or removal on the coded symbols such that the number of symbols is equal to the size of a predetermined interleaver. An interleaver 115 interleaves the output of the symbol repeater / remover 114. A block interleaver 115 may be used as the interleaver 115. The signal point mapper 116 maps “0” to “+1” and “1” to “-1” in the output signal of the interleaver 115. The output of the signal point mapper 116 is applied to one input terminal of a time division multiplexer (TDM) 125, and a signal of "0" is input to the other input terminal. The time division multiplexer 125 performs an operation of inputting and outputting the output of the signal point mapper 116 as long as the slot Walsh space indicator is allocated, and outputting the signal point mapper 116 for the remaining (16-L) slots. Does not perform input and output. That is, the signal point mapper 116 inputs and outputs a signal of "0" during the (16-L) slot. The Walsh cover 126 spreads the output of the time division multiplexer 125 by, for example, the Walsh code W _i ⁶⁴ having a length of 64. The gain controller 127 multiplies the signal spread by the Walsh spreader 126 by a predetermined channel gain and outputs the Q channel signal component.

FIG. 1 illustrates a case where a Walsh space indicator is transmitted through a Q channel as an example. A forward quality matching indicator (F-QMI) is transmitted to the I channel corresponding to the Q channel. The performance matching indicator is information for representing a performance matching technique used to ensure different performance for each data service. The encoder 121 encodes the performance match indicator. The performance matching indicator may consist of 7 bits per slot, and the encoder 121 may use a (24,7) block code. The signal mapper 122 maps "0" to "+1" and "1" to "-1" in the output signal of the encoder 121. The Walsh spreader 123 spreads the output of the signal mapper 122 by, for example, a Walsh code W _i ⁶⁴ having a length of 64. The gain controller 124 multiplies the signal spread by the Walsh spreader 123 by a predetermined channel gain and outputs the I channel signal component.

The Walsh space indicator transmission apparatus according to an embodiment of the present invention as shown in FIG. 1 attaches and encodes different frame performance indicator bits according to Walsh length, and then performs symbol repetition / removal process on codeword symbols. Characterized in that. It should be noted that the operation of symbol repetition / removal is performed to fit the interleaver size, and is performed differently depending on the Walsh length.

2 is a diagram illustrating a configuration of a Walsh space indicator transmission parameter determiner according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the Walsh space indicator transmission parameter determiner includes a parameter storage 101 and a transmission parameter determiner 102. The parameter storage unit 101 stores Walsh space indicator transmission parameters according to Walsh lengths, as shown in FIGS. 5A and 5B. The memory 101 may be implemented as a look-up table. The transmission parameter determiner 102 determines parameters suitable for transmitting Walsh space information corresponding to the Walsh length to be transmitted every predetermined time unit (20 msec frame unit). In this determination, the transmission parameter determiner 102 uses the parameter storage unit 101. The determining operation of the Walsh space transmission parameter will be described in detail with reference to FIGS. 5A and 5B described below.

FIG. 3 is a diagram illustrating a configuration of a base station that performs orthogonal spreading and radio frequency (RF) band transition processing so as to be suitable for transmitting a Walsh space indicator from the Walsh space indicator transmitting apparatus shown in FIG. 1 to a terminal.

Referring to FIG. 3, the quadrature spreader 131 inputs the signal component B of the I channel and the signal component C of the Q channel shown in FIG. 1, and outputs the input signals by orthogonally spreading them. . The quadrature spreader 131 may be implemented as a complex multiplier. The low pass filter 132 low pass filters the signal components of the I channel orthogonally spread by the quadrature spreader 131. The low pass filter 133 low pass filters the signal components of the Q channel orthogonally spread by the quadrature spreader 131. The frequency shifter 134 outputs the I-channel signal transitioned to the RF band by multiplying the I-channel signal output from the low pass filter 132 by the first carrier cos (2? Fct). The frequency shifter 135 outputs the Q channel signal transitioned to the RF band by multiplying the Q channel signal output from the low pass filter 133 by the second carrier sin (2? Fct). Summer 136 sums the output signals of the frequency shifters 134 and 135. The summation result signal by the summer 136 is radiated into the air through an antenna (not shown).

4A is a diagram illustrating an example of a channel structure by the Walsh space indicator transmission device shown in FIG. 1. This channel structure corresponds to an example in which Walsh space indicator codeword symbols output through the time division multiplexer 125 shown in FIG. 1 are transmitted for a predetermined L slot.

Referring to FIG. 4A, a frame, which is a basic unit of circuit data transmitted during a circuit service, is made of 20 msec, one frame is made of 16 slots, and one slot is made of 1.25 msec. Since the Walsh length and Walsh space information are changed by the frame unit allocation or release of the circuit service, the Walsh space indicator is transmitted in 20msec frame units. At this time, the Walsh space indicator frame is transmitted for L slots within one frame of 16 slots.

FIG. 4B is a diagram illustrating another example of a channel structure by the Walsh space indicator transmission device illustrated in FIG. 1.

Referring to FIG. 4B, the Walsh space indicator is transmitted to the 14th slot based on the 20msec frame boundary, and the Walsh space indicator is not transmitted during the remaining 2 slots. Unlike the example shown in FIG. 4A, this channel structure shows a structure for transmitting the Walsh space indicator before a predetermined slot offset. For example, the channel structure shows a structure for transmitting the Walsh space indicator from two slots of a 20 msec frame. That is, the Walsh space indicator may transmit an M slot offset for a length of 16 slots, or an M slot offset for an L slot (L = 16-M).

5A is a diagram illustrating various parameters used when transmitting a Walsh space indicator for 16 slots according to an embodiment of the present invention.

Referring to FIG. 5A, the parameters used to transmit the Walsh space indicator include Frame Quality Indicator Bits or CRC Bits, Data Rate, Code Rate, Symbol Repetition / Puncturing Factor, Interleaver Size (Symbols) and Symbol Rate. These Walsh space indicator transmission parameters are determined by the Walsh space information transmission parameter determiner shown in FIG. 2 according to Walsh length. The determined parameters are used in each block constituting the Walsh space indicator transmission device shown in FIG.

5A is an example of the present invention, a Walsh length 16 (16-ary Walsh), Walsh length 32 (32-ary Walsh), Walsh length 64 (64-ary Walsh), and Walsh length 128 (128-ary Walsh) ) Shows four examples of Walsh lengths. It also shows an example where the Walsh space indicator is transmitted only on one of the I or Q channels and the output symbols are spread by a Walsh code of 64 chips.

When 16-ary Walsh is used, the frame performance indicator adder 111 of FIG. 1 adds 6 bits of the frame performance indicator to the Walsh space indicator, and the tailbit adder 112 outputs tail bits to the output of the frame performance indicator adder 111. FIG. Add. The encoder 113 encodes the output signal of the tail bit adder 112 at a code rate of 1/2. The symbol repeater / reducer 114 multiplies the codeword symbol by 5.6471 times so that the codeword symbol by the encoder 113 has the same size as the size 384 of the interleaver 115. The interleaver 115 interleaves and transmits the output symbols of the symbol repeater / remover 114.

When 32-ary Walsh is used, the frame performance indicator adder 111 of FIG. 1 adds the frame performance indicator 8 bits to the Walsh space indicator, and the tailbit adder 112 outputs tail bits to the output of the frame performance indicator adder 111. FIG. Add. The encoder 113 encodes the output signal of the tail bit adder 112 at a code rate of 1/2. The symbol repeater / retractor 114 multiplies the codeword symbol by 3.66923 times so that the codeword symbol by the encoder 113 has the same size as the size 384 of the interleaver 115. The interleaver 115 outputs the symbol repeater / remover 114. Transmit after symbol interleaving.

In the case of using 64-ary Walsh, the frame performance indicator adding unit 111 of FIG. 1 adds 12 bits of the frame performance indicator to the Walsh space indicator, and the tail bit adding unit 112 outputs tail bits to the output of the frame performance indicator adding unit 111. FIG. Add. The encoder 113 encodes the output signal of the tail bit adder 112 at a code rate of 1/2. The symbol repeater / reducer 114 multiplies the codeword symbol by 2.1818 to ensure that the codeword symbol by the encoder 113 has the same size as the size 384 of the interleaver 115. The interleaver 115 interleaves and transmits the output symbols of the symbol repeater / remover 114.

In the case of using a 128-ary Walsh, the frame performance indicator adding unit 111 of FIG. 1 adds the frame performance indicator 16 bits to the Walsh space indicator, and the tail bit adding unit 112 outputs tail bits to the output of the frame performance indicator adding unit 111. FIG. Add. The encoder 113 encodes the output signal of the tail bit adder 112 at a code rate of 1/2. The symbol repeater / remover 114 multiplies the codeword symbol by 1.2308 to make the codeword symbol by the encoder 113 the same size as the size 384 of the interleaver 115. The interleaver 115 interleaves and transmits the output symbols of the symbol repeater / remover 114.

FIG. 5B is a diagram illustrating various parameters used when transmitting a Walsh space indicator during an L slot according to another embodiment of the present invention.

5B illustrates four types of Walsh lengths, such as 16-ary Walsh, 32-ary Walsh, 64-ary Walsh, and 128-ary Walsh, as shown in FIG. 5A, where the Walsh space indicator is transmitted only during the L slot. Shows the parameters used in. Even when the Walsh space indicator is transmitted during the L slot, the frame performance indicator bit number and the code rate of the encoder 113 are equally used as shown in FIG. 5A. In the case where the Walsh space indicator output symbol is Walsh spread by the Walsh spreader 126 of FIG. It is as many as number. That is, from the interleaver 115 of FIG. Symbols are output and transmitted. In the case of 16-ary Walsh, 32-ary Walsh, 64-ary Walsh, and 128-ary Walsh length, the amount of Walsh space information corresponding to each Walsh length is different. The number is different. The symbol repetition / removal operation is performed by the symbol repetition / remover 114 of FIG. 1 to ensure that the interleaver size is the same for each Walsh length having a different number of codeword symbols.

When using 16-ary Walsh, the symbol repeater / remover 114 Perform double symbol repetition / removal operation. If 32-ary Walsh is used, the symbol repeater / remover 114 Perform double symbol repetition / removal operation. If you use 64-ary Walsh, the symbol iterator / remover 114 Perform double symbol repetition / removal operation. When using 128-ary Walsh, the symbol iterator / remoter 114 Perform double symbol repetition / removal operation.

6 is a diagram illustrating a processing flow of a Walsh space indicator transmission operation according to an embodiment of the present invention.

Referring to FIG. 6, the base station allocates a Walsh code resource (or Walsh resource) allocated or released on a 20msec frame basis for a packet data service for a circuit service (or a circuit call service). As such, since the Walsh resource for the circuit service is allocated or released in units of 20msec frame, the Walsh space information (Walsh space indicator) for the packet data service may also be changed in units of 20msec. In order to use more Walsh resources for packet data service according to the Walsh resources allocated for the circuit service, the base station must change the Walsh length used and transmit Walsh space information corresponding to the Walsh length to the terminal. . The base station first checks the Walsh resources used for the circuit service every 20msec frame unit, and determines the Walsh resources to be used for the packet data service from the remaining Walsh resources except the checked Walsh resources (step 151). That is, the base station determines available Walsh space information according to the Walsh length to be used and the corresponding Walsh length.

When the Walsh length to be used is determined, an operation of determining the Walsh space information transmission parameter is performed as shown in FIGS. 5A and 5B. If the 128-ary Walsh length information is determined to be used (step 152), the 128-ary Walsh spatial information transmission parameters are determined and used (step 153). If the 64-ary Walsh length is determined to be used (step 154), the 64-ary Walsh spatial information transmission parameters are determined and used (step 155). If the 32-ary Walsh length is determined to be used (YES in step 156), the 32-ary Walsh spatial information transmission parameters are determined and used (step 157). If it is determined that the 16-ary Walsh length is to be used (NO in step 156), the 16-ary Walsh spatial information transmission parameters are determined and used (step 158). Transmission parameter determination of Walsh spatial information according to each Walsh length is performed by the transmission parameter determining unit 102 using the Walsh parameter storage unit 101 as shown in FIG. After the transmission parameters are determined, an operation of processing Walsh spatial information and transmitting for a given L slot is performed according to the determined transmission parameters (step 159).

When the Walsh used as described above is changed to 128-ary Walsh, 64-ary Walsh, 32-ary Walsh or 16-ary Walsh, the amount of transmission information is changed corresponding to the Walsh length. The apparatus of FIG. 1 assigns channel power differently according to the amount of transmission information by varying the number of times of symbol repetition / removal according to the change of the amount of transmission information. That is, according to the present invention, since the symbol repetition by the symbol repetition / remover 114 of FIG. 1 increases as the amount of transmission information decreases, the present invention has an advantage in that the power for transmitting the Walsh space indicator may be reduced.

7 is a diagram illustrating a configuration of a terminal for processing baseband frequency transition and band despreading when a Walsh space indicator is transmitted from a base station according to an embodiment of the present invention.

Referring to FIG. 7, an RF forward signal transmitted from a base station is input to a receiver through an antenna (not shown) of a forward link receiver (terminal). The received signal is input to mixers 211 and 212, respectively. The mixer 211 mixes the received signal with a carrier cos (2πfct) to convert a received signal in a high frequency band to down converting, that is, a baseband signal. The baseband filter 213 inputs the signal output from the mixer 211 to filter the baseband, and outputs the filtered signal to a quadrature despreading (despreader) 215. The mixer 212 mixes the received signal with a carrier sin (2πfct) to convert a received signal in a high frequency band into down-converting, that is, a baseband signal. The baseband filter 214 inputs the signal output from the mixer 212 to filter the baseband, and outputs the filtered signal to the quadrature despreader 215. The orthogonal despreader 215 inputs the signal output from the baseband filter 213 and orthogonally despreads and separates the signal of another base station and the signals of another path and outputs the I-channel signal component (X). In addition, the orthogonal despreader 215 inputs the signal output from the baseband filter 214 and orthogonal despreads to separate the signals of other base stations and the signals of other paths and output the signals as Q-channel signal components (Y).

FIG. 8 is a diagram illustrating a configuration of an apparatus for receiving a Walsh space indicator and generating a presence or absence of an error of a received Walsh space indicator frame according to an embodiment of the present invention. And perform a decoding operation. This receiving device is for demodulating the forward performance matching indicator (F-QMI) and the Walsh space indicator (WSI) from the orthogonal despreading signal as described in FIG.

Referring to FIG. 8, the input I and Q signals refer to I (X) and Q (Y) signals despread by the quadrature despreader 215 through the baseband filters 213 and 214 of FIG. 7, respectively. A Walsh despreader 221 despreads the I, Q signals by the Walsh code of the Performance Match Indicator / Walsh Space Indicator channel. In this case, the despread signal output from the Walsh despreader 221 is a signal output in symbol units. The channel compensator 222 removes or compensates for a distortion component generated as a signal is transmitted through a wireless channel environment, and outputs channel compensated I and Q signals. The I-channel component signal output from the channel compensator 222 is a performance match indicator channel signal component. The demodulator 223 demodulates BPSK (BPSK demodulation) as an example of the I channel component signal. The block decoder 224 blocks the output of the demodulator 223 and outputs the decoding result as a final performance matching indicator (F-QMI).

The Q channel component signal output from the channel compensator 222 is a Walsh space indicator channel signal component. The demodulator 225 demodulates BPSK demodulation of the Q channel component signal as an example. The deinterleaver 226 deinterleaves the input signal. The sequence combiner 227 adds the sequence using symbol repetition and removal parameters according to the Walsh length. Decoder 228 decodes the output of the sequence summer 227. As the decoder 228, a convolutional decoder or a turbo decoder may be used. In this case, the decoder 228 outputs WSI frame ACK / NACK information and Walsh space indicator decoding bits (WSI information) of a frame decoded using a frame performance indicator (CRC) having a different number of bits depending on the Walsh length. do.

9 is a view showing the configuration of the Walsh space indicator receiving parameter output unit according to an embodiment of the present invention.

Referring to FIG. 9, the Walsh space indicator receiving parameter output unit includes a parameter storage unit 201 and a parameter output unit 202. The parameter storage unit 201 is a component corresponding to the parameter storage unit 101 illustrated in FIG. 2 and stores various parameters corresponding to each of Walsh lengths as illustrated in FIG. 5A and FIG. 5B. The parameter storage unit 201 may be implemented as a lookup table. The parameter output unit 202 outputs the parameters corresponding to each Walsh length using the contents stored in the parameter storage unit 201-the number of CRC bits and the repetition / puncture factor. do. The parameters output from the parameter output unit 202 are provided to the sequence summer 227 and the decoder 228 of FIG. 8 to be used in the Walsh space indicator reception processing operation.

FIG. 10 is a flowchart illustrating a processing flow of receiving a Walsh space indicator and generating an error presence of a received Walsh space indicator frame according to an embodiment of the present invention.

Referring to FIG. 10, the Walsh despreader 221 of the terminal as illustrated in FIG. 8 classifies a channel of a Walsh space indicator frame into a corresponding Walsh code, and the channel compensator 222 is a channel separated Walsh space indicator (walsh space information). Channel compensation is performed on the frame, and the demodulator 225 performs symbol demodulation on the channel compensated Walsh space indicator frame (step 251). The deinterleaver 226 performs deinterleaving on the demodulation symbol during the Walsh space indicator frame. At this time, the terminal transmits Walsh space information for 128-ary Walsh length, Walsh space information for 64-ary Walsh length, Walsh space information for 32-ary Walsh length, or 64- It is not known whether Walsh spatial information for ary Walsh length has been sent. Therefore, the Walsh space indicator receiving parameter output unit 202 shown in FIG. 9 sequentially outputs the parameters for each of the four cases to the sequence adder 227 and the decoder 228 corresponding to each other. Then, the decoder 228 determines whether the CRC check result corresponding to each parameter is good, and outputs WSI frame ACK / NACK information indicating the determination result.

First, the Walsh space indicator receiving parameter output unit 202 assumes that the base station has transmitted the information about the 128-ary Walsh length, and outputs the corresponding parameters from the parameter storage unit 201. Then, the sequence adder 227 sums the number of symbol repetitions / removals according to the 128-ary Walsh information transmission scheme with respect to the deinterleaved symbol, and the decoder 228 adds the sequence using the number of frame performance indicator (CRC) bits. In step 252, it is determined whether there is an error in the output frame. If no error occurred (CRC_GOOD), since the Walsh space indicator information transmitted by the base station is correctly received, the received Walsh space information is used to determine data demodulation and data rate during a predetermined use period ( Step 257). In contrast, if an error occurs (CRC_BAD), it is assumed that information on a 64-ary Walsh length is transmitted.

The Walsh space indicator receiving parameter output unit 202 assumes that the base station has transmitted information on the 64-ary Walsh length, and outputs corresponding parameters from the parameter storage unit 201. Then, the sequence adder 227 sums the number of symbol repetitions / removals according to the 64-ary Walsh information transmission scheme with respect to the deinterleaved symbol, and the decoder 228 adds the sequence using the frame performance indicator (CRC) bit number. In step 253, it is determined whether there is an error in the output frame. If no error occurred (CRC_GOOD), since the Walsh space indicator information transmitted by the base station is correctly received, the received Walsh space information is used to determine data demodulation and data rate during a predetermined use period ( Step 257). In contrast, if an error occurs (CRC_BAD), it is assumed that information on a 32-ary Walsh length is transmitted.

The Walsh space indicator receiving parameter output unit 202 assumes that the base station has transmitted information about the 32-ary Walsh length, and outputs corresponding parameters from the parameter storage unit 201. Then, the sequence adder 227 adds the symbol repetition / removal number according to the 32-ary Walsh information transmission scheme to the deinterleaved symbol, and the decoder 228 adds the sequence using the frame performance indicator (CRC) bit number. In step 254, it is determined whether or not an error is detected in the output frame. If no error occurred (CRC_GOOD), since the Walsh space indicator information transmitted by the base station is correctly received, the received Walsh space information is used to determine data demodulation and data rate during a predetermined use period ( Step 257). In contrast, if an error occurs (CRC_BAD), it is assumed that information on a 16-ary Walsh length is transmitted.

The Walsh space indicator receiving parameter output unit 202 assumes that the base station has transmitted information about the 16-ary Walsh length, and outputs corresponding parameters from the parameter storage unit 201. Then, the sequence adder 227 sums the number of symbol repetitions / removals according to the 16-ary Walsh information transmission scheme with respect to the deinterleaved symbol, and the decoder 228 adds the sequence using the frame performance indicator (CRC) bit number. In step 255, it is determined whether there is an error in the output frame. If no error occurred (CRC_GOOD), since the Walsh space indicator information transmitted by the base station is correctly received, the received Walsh space information is used to determine data demodulation and data rate during a predetermined use period ( Step 257). In contrast, if an error occurs (CRC_BAD), the decoder 228 outputs NACK information indicating that an error has occurred in the Walsh space information.

If it is determined that an error of the Walsh space indicator frame does not occur during the execution of any one of the above four transmission methods, the terminal informs the base station through the ACK that it correctly received Walsh space information. On the contrary, if an error of the Walsh space indicator frame occurs even after performing all four transmission schemes, the terminal informs the base station that the received Walsh space information error has occurred through the NACK. Then, the base station does not allocate packet data to the terminal having an error in the Walsh space information during the corresponding time period. In this case, the terminal does not demodulate data symbols during 20 msec in which the received Walsh space information is used.

11 to 16 are diagrams illustrating configurations of a transmission apparatus for informing a base station of information indicating whether an error of a Walsh space indicator frame transmitted from a base station is received as illustrated in FIG. 10.

FIG. 11 is a diagram illustrating a configuration of an apparatus for transmitting error presence information of a Walsh space indicator frame according to a first embodiment of the present invention. This device transmits error information of Walsh space indicator frame according to output symbol repetition type of reverse ACK channel and reverse DRQ channel.

Referring to FIG. 11, a reverse acknowledgment (ACK) channel is a channel for determining whether there is an error by decoding data including up to four frame performance indicators in a forward direction, and spreading Walsh spread information to a base station. . The reverse ACK channel signal may consist of 4 bits in every slot. The reverse ACK channel signal is input to the block encoder 311 and is block coded (12, 4). The signal mapper 312 maps "0" to "+1" and "1" to "-1" in the output of the block encoder 311. The Reverse Data Rate Request (DRQ) channel is a channel in which a terminal measures a channel condition to determine a variable data rate and requests the determined data rate to a base station. The reverse DRQ channel signal may consist of 4 bits in every slot. The reverse DRQ channel signal is input to the block encoder 321 and block coded (12,4). The signal mapper 322 maps "0" to "+1" and "1" to "-1" in the output of the block encoder 321. The reverse ACK channel signal from the signal mapper 312 is applied to the time division multiplexer 330 via the Walsh spreader 313. The reverse DRQ channel signal from the signal generator 322 is applied to the time division multiplexer 330 via the Walsh spreader 323. The time division multiplexer 330 time divisions the reverse ACK channel signal and the reverse DRQ channel signal by 1: 1 and outputs the signal as (D).

Error information of the Walsh space indicator frame (WSI Frame ACK / NACK Indicator) may be transmitted using a 2-ary Walsh function. That is, error information of the Walsh space indicator frame is applied to the Walsh spreaders 313 and 323 of the uplink ACK channel and the uplink DRQ channel. At this time, the Walsh spreaders 313 and 323 select one of the 2-ary Walsh functions according to the value of the presence / absence information of the Walsh space indicator frame, and Walsh spread the output symbols of the signal mappers 312 and 313 according to the selected value. Table 1 below shows the signal mapping relationship of the 2-ary Walsh function.

division 2-ary Walsh function Signal Point Mapping There are no errors in the Walsh space indicator frame. W ₀ ² ++ There is an error in the Walsh space indicator frame. W ₁ ² +-

Referring to Table 1, 2-ary Walsh function W ₀ ² is represented by two consecutive positive signals (+1 +1), and 2-ary Walsh function W ₁ ² is a continuous one. It is represented by two signals (+1 -1) of positive (+) and negative (-). The Walsh spreaders 313 and 323 multiply an input signal symbol (or sequence) by a 2-ary Walsh function W ₀ ² when there is no error in the Walsh space indicator frame, and output an input signal symbol when there is an error in the Walsh space indicator frame. (Or sequence) multiplies the 2-ary Walsh function W ₁ ² and outputs it.

If there is no error in the Walsh space indicator frame, the output symbols of the reverse ACK channel signal mapper 312 are input to the Walsh spreader 313, and the output symbols of the signal mapper 322 of the reverse DRQ channel are input to the Walsh spreader 323, respectively. Walsh spread in symbol units by the ary Walsh function W ₀ ² . When the output symbols of the signal mappers 312 and 322 are "+1", Walsh spreaders (+ 1 + 1) are output from Walsh spreaders 313,323 as Walsh spread occurs in symbol units by the Walsh function W ₀ ² 2. do. If there is an error in the Walsh space indicator frame, the output symbols of the reverse ACK channel signal mapper 312 are input to the Walsh spreader 313, and the output symbols of the signal mapper 322 of the reverse DRQ channel are input to the Walsh spreader 323, respectively. Walsh spread in symbol units by the ary Walsh function W ₁ ² . When the output symbols of the signal mappers 312 and 322 are " + 1 ", Walsh spreaders are output from the Walsh spreaders 313 and 323 as Walsh spread occurs in symbol units by the Walsh function W ₁ ² . . The time division multiplexer 330 time divisionally outputs the output symbols of the Walsh spreaders 313 and 323 at 1: 1.

In FIG. 11, the error information of the Walsh space indicator frame is illustrated and transmitted by using both the reverse ACK channel and the reverse DRQ channel. However, the error information of the Walsh space indicator frame may be stored in the ACK channel and the DRQ channel. It can be transmitted using only one channel.

FIG. 12 is a diagram illustrating a configuration of an apparatus for transmitting error information of a Walsh space indicator frame according to a second embodiment of the present invention. The device transmits error information of the Walsh space indicator frame according to the output symbol repetition type of the backward Selected Sector Indicator (SSI) channel. In this case, the reverse SSI channel measures the received signal-to-noise ratio (SNR) of a signal received from each base station, and then selects the best base station selected to receive data in the reverse direction. The channel to transmit.

Referring to FIG. 12, the reverse SSI channel signal may consist of 3 bits per slot. The block encoder 341 blocks (12,3) the backward SSI channel signal. The signal mapper 342 maps "0" to "+1" and "1" to "-1" in the output of the block encoder 341. The output symbol of the signal mapper 342 is input to a Walsh spreader 343. The Walsh spreader 343 spreads the output symbols of the signal mapper 342 in symbol units according to a Walsh function determined by error information (WSI Frame ACK / NACK Indicator) of the Walsh space indicator frame. The Walsh spreader 343 spreads the output symbols of the signal mapper 342 in symbol units using the Walsh function W ₀ ² when an error of the Walsh space indicator frame does not occur, and the Walsh function W ₁ ² when an error occurs. By using to spread the output symbol of the signal mapper 342 in symbol units. The spread signal by the Walsh spreader 343 is output as the (E) signal.

As illustrated in FIGS. 11 and 12, it is possible to transmit error information of a Walsh space indicator frame through a reverse DRQ channel, a reverse ACK channel, and a reverse SSI channel to output the block encoders 311, 321, and 341 in the three channels. This is because only one iteration of the symbol is made and transmitted. The signals of the three channels are spread by a 32 chip long Walsh code during half slots (768 chips), with the number of symbols coming into the input of the Walsh spreaders 313, 323, 343 being 24. In addition, since the information of the three channels passes through the block encoders 311, 321, and 341 generating 12 output symbols, there should be a repetition of the symbols in each symbol unit. Such symbol repetition may be performed by using a 2-ary Walsh function, and one bit of error information of a Walsh space indicator frame may be transmitted to the 2-ary Walsh function. In this way, there is an advantage that the 1-bit information can be performed without allocating the Walsh channel without allocating the channel power. Information indicating whether an error of the Walsh space indicator frame may be transmitted from the terminal to the base station through one of a reverse DRQ channel, a reverse ACK channel, or a reverse SSI channel.

FIG. 13 is a diagram illustrating a configuration of an apparatus for transmitting error information of a Walsh space indicator frame according to a third embodiment of the present invention. This device transmits error information of Walsh space indicator frame according to output sequence repetition type of reverse ACK channel and reverse DRQ channel.

Referring to FIG. 13, an apparatus for transmitting an error information of a Walsh space indicator frame includes a block encoder 311 and a signal mapper 312 for processing a reverse ACK channel signal in the same manner as the apparatus shown in FIG. 11, and a reverse DRQ channel. A block encoder 321 and a signal mapper 322 for processing the signal. However, unlike the apparatus shown in FIG. 11, error information on the Walsh space indicator frame is transmitted according to the output sequence repetition type of the reverse ACK channel and the reverse DRQ channel.

The reverse ACK channel signal is input to the block encoder 311 and block coded (12,4). The signal mapper 312 maps "0" to "+1" and "1" to "-1" in the output of the block encoder 311. The reverse DRQ channel signal is input to the block encoder 321 and block coded (12,4). The signal mapper 322 maps "0" to "+1" and "1" to "-1" in the output of the block encoder 321. The reverse ACK channel signal from the signal mapper 312 is applied to the time division multiplexer 331 via a Walsh spreader 315. The reverse DRQ channel signal from the signal mapper 322 is applied to the time division multiplexer 331 via the Walsh spreader 325. The time division multiplexer 331 time-divides the reverse ACK channel signal and the reverse DRQ channel signal by 1: 1 and outputs the signal as (D).

If there is no error in the Walsh space indicator frame, the output sequence of the signal mapper 312 of the reverse ACK channel is input to the Walsh spreader 315, and the output sequence of the signal mapper 322 of the reverse DRQ channel is input to the Walsh spreader 325, respectively. -ary Walsh spread by sequence Walsh function W ₀ ² . That is, the 12 symbols output from the signal mappers 312 and 322 after passing through the block encoders 311 and 321 constitute one sequence. The Walsh spreaders 315 and 325 of the sequence unit multiply "+1" by the first 12 symbols. "+1" is also multiplied by the second 12 symbol sequence.

If there is an error in the Walsh space indicator frame, the output sequence of the signal mapper 312 of the reverse ACK channel is input to the Walsh spreader 315, and the output sequence of the signal mapper 322 of the reverse DRQ channel is input to the Walsh spreader 325, respectively. -ary Walsh spreads in sequence by the Walsh function W ₁ ² . That is, the 12 symbols output from the signal mappers 312 and 322 after passing through the block encoders 311 and 321 constitute one sequence. The Walsh spreaders 315 and 325 of the sequence unit multiply "+1" by the first 12 symbols. The second 12 symbol sequence is multiplied by "-1" and output.

In FIG. 13, the error information of the Walsh space indicator frame is transmitted and transmitted using both the reverse ACK channel and the reverse DRQ channel. However, error information of the Walsh space indicator frame may be transmitted using only one of an ACK channel and a DRQ channel.

FIG. 14 is a diagram illustrating a configuration of an apparatus for transmitting error presence information of a Walsh space indicator frame according to a fourth embodiment of the present invention. This device transmits information on the presence or absence of a Walsh space indicator frame according to the output sequence repetition type of the reverse SSI channel.

Referring to FIG. 14, the backward SSI channel signal is input to the block encoder 341 and is block coded (12, 3). The signal mapper 342 maps "0" to "+1" and "1" to "-1" in the output of the block encoder 341. The output symbol of the signal mapper 342 is input to a Walsh diffuser 345. The Walsh spreader 345 spreads the output symbols of the signal mapper 342 in sequence units according to a Walsh function determined by error information (WSI Frame ACK / NACK Indicator) of the Walsh space indicator frame. The Walsh spreader 345 spreads the output symbol of the signal mapper 342 in sequence units using the Walsh function W ₀ ² when no Walsh space indicator frame error occurs, and the Walsh function W ₁ ² when an error occurs. Spreads the output symbols of the signal mapper 342 in sequence units. The spread signal by the Walsh spreader 345 is output as the (E) signal.

13 and 14 may transmit information on the presence or absence of the Walsh space indicator frame using a reverse DRQ channel, an ACK channel or an SSI channel including sequence repetition as shown in FIGS. 11 and 12. That is, the terminal can transmit the presence or absence information of the 1-bit Walsh space indicator frame to the base station without allocating the channel power without additionally allocating the Walsh channel.

FIG. 15 is a diagram illustrating a configuration of an apparatus for transmitting error information of a Walsh space indicator frame according to a fifth embodiment of the present invention. This device transmits the information on the presence or absence of Walsh space indicator frame by time division multiplexing with the reverse SSI channel.

Referring to FIG. 15, a 3-bit reverse SSI channel signal is input to the block encoder 341 and block-coded (12, 3). The signal mapper 342 maps "0" to "+1" and "1" to "-1" in the output of the block encoder 341. The output symbol of the signal mapper 342 is input to the time division multiplexer 360. Information indicating the presence or absence of an error in the Walsh space indicator frame (WSI Frame ACK / NACK Indicator) is allocated to 1 bit, and this information is input to the bit iterator 351. The bit repetition unit 351 repeats information indicating whether there is an error in the Walsh space indicator frame 12 times. At this time, the bit repetition parameter of the bit repeater 351 is set to 768. The signal mapper 352 maps "0" to "+1" and "1" to "-1" in the output of the bit repeater 351. The output symbol of the signal mapper 352 is input to the time division multiplexer 360. The time division multiplexer 360 transmits the outputs of the signal mappers 342 and 352 by 1: 1 time division multiplexing.

FIG. 16 is a diagram illustrating a configuration of a terminal that performs orthogonal spreading and high frequency transition processing so as to be suitable for transmitting error presence information of Walsh space indicator frames transmitted by the transmitting apparatuses shown in FIGS. 11 to 15 to the base station.

Referring to FIG. 16, the Walsh channel gain 371 receives the (D) signal and multiplies and outputs an appropriate gain. The Walsh channel gain 372 receives the (E) signal and multiplies it by the appropriate gain to output it. The Walsh channel gain 373 receives the (F) signal and multiplies it by the appropriate gain. The (D) signal is a spread signal output from the apparatus shown in Figs. 11 and 13, and the (E) signal is a spread signal output from the apparatus shown in Figs. The Walsh Chip Summer 374 adds the output signals of the Walsh channel gains 371 to 373 in units of chips, and outputs the sum result as an I-channel signal.

Quadrature Spreader 375 inputs an I-channel signal from Walsh chip summer 374, and inputs a Q-channel signal to perform quadrature spreading. The signals orthogonally spread by the quadrature spreader 375 are output as I channel signal components and Q channel signal components. Lowpass filter 376 lowpass filters the I-channel signal from quadrature spreader 375. The low pass filter 377 low pass filters the Q channel signal from the quadrature spreader 377. The frequency shifter 378 outputs the I-channel signal transitioned to the RF band by multiplying the I-channel signal output from the low pass filter 376 by the first carrier cos (2? Fct). The frequency shifter 379 outputs the Q channel signal transitioned to the RF band by multiplying the Q channel signal output from the low pass filter 377 by the second carrier sin (2? Fct). Summer 380 sums the output signals of the frequency shifters 378,379. The sum result signal by the summer 380 is radiated into the air through an antenna (not shown).

FIG. 17 illustrates mapping of one of the DRQ symbols transmitted in the backward direction to the error presence information of the Walsh space indicator frame when the reverse DRQ channel is used to transmit error information of the Walsh space indicator frame according to an embodiment of the present invention. It is a diagram showing a relationship.

Referring to FIG. 17, the terminal measures a signal-to-noise ratio (SNR) of a signal received from a base station to determine a data rate to be transmitted, that is, DRQ symbols (0000 to 1100), and uses the determined DRQ symbol in a reverse DRQ channel. Through the transmission to the base station. When the data rate is represented by a 4-bit DRQ symbol, three extra DRQ symbols remain since 13 are used as DRQ symbols. Error information of the Walsh space indicator frame may be transmitted using any one of the three extra DRQ symbols. When an error occurs in the Walsh space indicator frame, the terminal transmits one of the " 1101 ", " 1110 " or " 1111 " to the base station instead of transmitting the DRQ symbols " 0000 " to " 1100 ". In FIG. 17, the DRQ symbol "1111" is defined to indicate that an error has occurred in the Walsh space indicator frame.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention provides a base station channel transmission apparatus and method for transmitting Walsh space information to be allocated to a packet data service variably every 20msec by a circuit service in a system that simultaneously performs a packet data service and a circuit service. Has In addition, another object of the present invention is to have an appropriate data transmission method in consideration of the Walsh length of the Walsh space information provided from the base station. In addition, another object of the present invention is to receive the frame including the Walsh space indicator, the terminal notifies the base station whether there is an error in the frame so that the base station does not transmit data while there is an error in the Walsh space information to improve the performance of the system There is an advantage that does not lower.

Claims (49)

In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A base station apparatus for transmitting to a terminal Walsh space indicator parameters indicative of a length and usable Walsh space information corresponding to the length, An encoder for encoding the Walsh space information and outputting the encoded Walsh space information symbol; A symbol repetition / removal for transmitting a symbol repetition / removal number among the parameters determined corresponding to the Walsh length, and repeating / removing the Walsh space information symbol accordingly; And a Walsh spreader for outputting the output of the symbol repeater / rejector for Walsh spread for a predetermined slot in the frame and for output. The apparatus of claim 1, further comprising: a parameter storage unit which stores transmission parameters corresponding to a plurality of Walsh lengths; And a parameter determiner configured to determine, from the parameter storage unit, a transmission parameter representing the Walsh space information corresponding to the Walsh length. The base station apparatus as claimed in claim 1, wherein the output of the symbol repeater / reductor further comprises an interleaver for interleaving the set size and interleaving the set size. In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A method for a base station to transmit Walsh space indicator transmission parameters indicative of a length and available Walsh space information corresponding to the length, to a terminal; Encoding the Walsh space information and outputting the encoded Walsh space information symbol; Transmitting a symbol repetition / removal number from among the parameters determined corresponding to the Walsh length, and repeating / removing the Walsh space information symbol accordingly; And spreading the symbol repeated / removed symbols during the predetermined slot in the frame and outputting them for transmission. The method as claimed in claim 4, wherein the output of the symbol repeater / reductor is performed to suit the size of the interleaver, and further comprising interleaving by the set size. In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A base station apparatus for transmitting to a terminal Walsh space indicator parameters indicative of a length and usable Walsh space information corresponding to the length, A frame performance indicator adding unit which adds a frame performance indicator of the number of bits determined corresponding to the Walsh length to the Walsh space information; An encoder for encoding an output of the frame performance indicator adder and outputting a Walsh space information symbol; A symbol repetition / removal for repeating / removing the Walsh spatial information symbol according to the number of symbol repetition / removals determined corresponding to the Walsh length; And a Walsh spreader for outputting the output of the symbol repeater / rejector for Walsh spread for a predetermined slot in the frame and for output. The apparatus of claim 6, further comprising: a parameter storage unit configured to store parameters for transmitting the number of bits and symbol repetition / removal of the frame performance indicator corresponding to each of the plurality of Walsh lengths; And a parameter determiner configured to determine, from the parameter storage unit, a parameter to be transmitted corresponding to the Walsh length. 7. The base station apparatus as claimed in claim 6, wherein the output of the symbol repeater / reductor further comprises an interleaver for performing an interleaving of the set interleaver and interleaving the set size. In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A method for a base station to transmit Walsh space indicator parameters indicating a length and available Walsh space information corresponding to the length to a terminal, the method comprising: Adding a frame performance indicator of the number of bits determined corresponding to the Walsh length to the Walsh space information; Encoding Walsh space information to which the frame performance indicator is added and outputting Walsh space information symbols; Repeating / removing the Walsh spatial information symbol according to the number of symbol repetitions / removals among the parameters determined corresponding to the Walsh length; And spreading the symbol repeated / removed Walsh spatial information symbol during Walsh spread for a predetermined slot in the frame and outputting the same for transmission. The method as claimed in claim 9, further comprising performing the symbol repeated / removed Walsh space information symbol to fit the size of an interleaver and interleaving the set size. In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A base station apparatus for transmitting to a terminal Walsh space indicator parameters indicative of a length and usable Walsh space information corresponding to the length, A frame performance indicator adder which adds the number of frame performance indicator bits determined to correspond to the Walsh length to the Walsh space information; A first encoder for encoding an output of the frame performance indicator adder and outputting a Walsh space information symbol; A symbol repetition / removal for repeating / removing the Walsh space information symbol according to a parameter value indicating the number of symbol repetition / removals among the parameters determined corresponding to the Walsh length; A first Walsh spreader that spreads the output of the symbol repeater / rejector by a pre-set Walsh code during a preset slot in the frame; A second encoder for encoding a performance matching indicator for performance guarantee for the packet data service and outputting a performance matching indicator symbol; A second Walsh spreader for spreading the performance match indicator symbol by the set Walsh code; And a transmitter for translating the outputs of the first Walsh spreader and the second Walsh spreader into signals of orthogonal spreading and high frequency band and outputting for transmission. 12. The apparatus of claim 11, further comprising: a parameter storage unit for storing parameters for transmitting the number of bits and symbol repetition / removal of the frame performance indicator corresponding to each of the plurality of Walsh lengths; And a parameter determiner configured to determine, from the parameter storage unit, a parameter to be transmitted corresponding to the Walsh length. The base station apparatus as claimed in claim 11, wherein the output of the symbol repeater / reductor further comprises an interleaver for interleaving the set size and interleaving the set size. 14. The base station apparatus according to claim 13, further comprising a time division multiplexer connected between the interleaver and the first Walsh spreader and time-division multiplexing the output of the interleaver during the set slot in the frame. . In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A method for a base station to transmit Walsh space indicator parameters indicating a length and available Walsh space information corresponding to the length to a terminal, the method comprising: Adding a frame performance indicator of the number of bits determined corresponding to the Walsh length to the Walsh space information; Encoding Walsh space information to which the frame performance indicator is added and outputting Walsh space information symbols; Repeating / removing the Walsh spatial information symbol according to a parameter value corresponding to the number of symbol repetitions / removals among parameters determined corresponding to the Walsh length; Spreading the symbol repeated / removed Walsh spatial information symbol by a preset Walsh code during a preset slot in the frame; Encoding a performance matching indicator for performance guarantee for the packet data service and outputting a performance matching indicator symbol; Spreading the performance matching indicator symbol by the set Walsh code; And translating the Walsh-spreaded Walsh spatial information symbol and the Walsh-spreaded performance match indicator into signals of orthogonal spreading and high frequency band and outputting the signals for transmission. The method of claim 15, further comprising interleaving the symbol repeated / removed Walsh space information symbol by a predetermined size. In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A terminal device for receiving Walsh space indicator parameters from a base station indicating a length and available Walsh space information corresponding to the length, A demodulator for demodulating the Walsh despread signal; A sequence adder for sequence summing demodulation symbols by the demodulator according to symbol repetition and removal parameters determined corresponding to the Walsh length; And a decoder for decoding the output of the sequence summer and outputting the Walsh space information from the decoding result. 18. The apparatus of claim 17, further comprising: a parameter storage unit which stores received parameters corresponding to a plurality of Walsh lengths; And a parameter output unit for reading the received parameter corresponding to the Walsh length from the parameter storage unit and outputting the parameter to the sequence summer. 19. The terminal apparatus as claimed in claim 18, further comprising a deinterleaver connected between the demodulator and the sequence summer and deinterleaving a demodulation symbol by the demodulator. In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A method for a terminal to receive Walsh space indicator parameters representing a length and available Walsh space information corresponding to the length from a base station, the method comprising: Demodulating the Walsh despread signal; Sequencing the symbols of the demodulated received signal according to the symbol repetition and removal parameters determined corresponding to the Walsh length; And decoding the sequence summed symbol and outputting the Walsh space information from the decoding result. 21. The method of claim 20, further comprising deinterleaving a symbol of the demodulated received signal. ] In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A terminal device for receiving Walsh space information from a base station indicating a length and available Walsh code information corresponding to the length, A demodulator for demodulating the Walsh despread signal; A sequence adder for sequence summing demodulation symbols by the demodulator according to a parameter value corresponding to the number of symbol repetitions / removals among the parameters determined corresponding to the Walsh length; Decoding the output of the sequence summer, outputting the Walsh space information from the decoding result, and further, in frame units according to a frame performance indicator (CRC) bit number parameter value determined corresponding to the Walsh length from the decoding result. And a decoder which determines whether an error is present in the Walsh space information. 23. The apparatus of claim 22, further comprising: a parameter storage unit for storing reception parameters of the number of bits and symbol repetition / removal of the frame performance indicator corresponding to the plurality of Walsh lengths; And a parameter output unit configured to read the symbol repeat / remove number parameter corresponding to the Walsh length from the parameter storage unit and output the readout parameter to the sequence summer. 23. The terminal apparatus as claimed in claim 22, further comprising a deinterleaver connected between the demodulator and the sequence summer and deinterleaving a demodulation symbol by the demodulator. In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A method for a terminal to receive Walsh space indicator parameters representing a length and available Walsh space information corresponding to the length from a base station, the method comprising: Demodulating the Walsh despread signal; Sequentially summing symbols of the demodulated received signal according to a parameter value corresponding to the number of symbol repetitions / removals among the parameters determined corresponding to the Walsh length; Decoding the sequence summed symbol; Outputting the Walsh space information from the decoding result; And determining whether there is an error with respect to the Walsh space information on a frame basis according to a frame performance indicator (CRC) of the number of bits determined corresponding to the Walsh length from the decoding result. 27. The method of claim 25, further comprising deinterleaving a symbol of the demodulated received signal. In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A terminal device for receiving Walsh space indicator parameters from a base station indicating a length and available Walsh space information corresponding to the length, A demodulator for demodulating the Walsh despread signal; A sequence adder for sequence summing demodulation symbols by the demodulator according to a parameter value corresponding to the number of symbol repetitions / removals among parameters determined corresponding to the Walsh length; Decodes the output of the sequence summer, outputs the Walsh space information from the decoding result, and adds the Walsh space information to the Walsh space information on a frame basis according to a frame performance indicator (CRC) bit number parameter determined corresponding to the Walsh length. Decoder to determine whether there is an error for, And a transmitter for transmitting information indicating whether there is an error with respect to the Walsh space information to the base station. 28. The apparatus of claim 27, further comprising: a parameter storage unit for storing parameters representing the number of bits and symbol repetition / removal of the frame performance indicator corresponding to each of the plurality of Walsh lengths; And a parameter output unit for reading the received parameter corresponding to the Walsh length from the parameter storage unit and outputting the parameter to the sequence summer and the decoder. 28. The terminal apparatus as claimed in claim 27, further comprising a deinterleaver connected between the demodulator and the sequence summer and deinterleaving a demodulation symbol by the demodulator. The method of claim 27, wherein the transmitter, A first Walsh spreader configured to decode data including the frame performance indicator received from the base station to determine whether there is an error, and to Walsh spread the information as a result of the determination; A second Walsh spreader for Walsh spreading information for requesting a variable data rate to the base station according to channel conditions; A time division multiplexer for time division multiplexing the outputs of the first Walsh spreader and the second Walsh surer; A high frequency transmitter for processing the output of the time division multiplexer in a high frequency band and transmitting the same to the base station, And at least one of the Walsh spreaders is transmitted information indicating whether or not there is an error in the Walsh space information. 31. The terminal apparatus as claimed in claim 30, wherein the Walsh spreaders spread the determination result information and the request information by using a 2-ary Walsh function according to information indicating whether an error exists in the Walsh space information. The terminal device as claimed in claim 30, wherein the Walsh spreaders perform a spread operation in symbol units. 31. The terminal device of claim 30, wherein the Walsh spreaders perform a spreading operation in sequence units. The terminal device as claimed in claim 30, further comprising an encoder for encoding the determination result information and outputting the encoded information to the first Walsh spreader. The terminal device as claimed in claim 30, further comprising an encoder for encoding the request information and outputting the encoded information to the second Walsh spreader. The method of claim 27, wherein the transmitter, A Walsh spreader for measuring a received signal-to-noise ratio (SNR) to select a base station suitable for receiving data, and Walsh spreading to transmit the SSI information indicating the selection result to the selected base station; A high frequency transmitter for processing the output of the Walsh spreader in a high frequency band and transmitting the same to the base station; And the information indicating whether there is an error with respect to the Walsh space information is transmitted by the Walsh spreader. 37. The terminal apparatus of claim 36, wherein the Walsh spreader spreads the SSI information using a 2-ary Walsh function according to information representing various presences of the Walsh spatial information. The method of claim 27, wherein the transmitter, An encoder for selecting a base station suitable for receiving data by measuring a received signal-to-noise ratio (SNR), and encoding the SSI information indicating the selection result with the selected base station; A bit repeater for repeating information indicating whether there is an error with the Walsh space information by a predetermined number of bits; A time division multiplexer for time division multiplexing the outputs of the encoder and the bit repeater; And a high frequency transmitter for processing the output of the time division multiplexer in a high frequency band and transmitting the same to the base station. In a mobile communication system which simultaneously supports a voice service and a packet data service, a Walsh code for the packet data service is variably determined according to a Walsh code allocated for the voice service in units of preset frames, and the Walsh code of the determined Walsh code is determined. A method for a terminal to receive Walsh space indicator parameters representing a length and available Walsh space information corresponding to the length from a base station, the method comprising: Demodulating the Walsh despread signal; A sequence adder for sequentially summing symbols of the demodulated received signal according to a parameter value corresponding to a symbol repetition / removal number among the parameters determined corresponding to the Walsh length; Decoding the sequence summed symbol; Outputting the Walsh space information from the decoding result; Determining whether there is an error in the Walsh space information in units of frames according to the frame performance indicator bit number parameter determined from the decoding result corresponding to the Walsh length; And a transmitter for transmitting information indicating whether there is an error with respect to the Walsh space information to the base station. 40. The method of claim 39, further comprising deinterleaving a symbol of the demodulated received signal. The method of claim 39, wherein the transmission process, A first Walsh spreading process of decoding data including frame performance indicators received from the base station to determine whether there is an error and Walsh spreading the information as a result of the determination; A second Walsh spreading process for Walsh spreading information for requesting a variable data rate to the base station according to channel conditions; Time division multiplexing the Walsh spread decision result information and the Walsh spread data rate request information; Processing the time division multiplexed information in a high frequency band and transmitting the same to the base station, And the determination result information and the data rate request information are selectively Walsh-spreaded according to the information indicating the presence or absence of an error with respect to the Walsh space information. 42. The method as claimed in claim 41, wherein the determination result information and the request information are spread by a 2-ary Walsh function according to information indicating whether there is an error with the Walsh space information. 42. The method of claim 41, wherein Walsh spreading of the determination result information and the request information is performed in symbol units. 42. The method of claim 41, wherein Walsh spreading of the determination result information and the request information is performed in sequence units. 40. The method of claim 39, further comprising: encoding the determination result information and outputting the first Walsh spreading operation for the first Walsh spreading operation. 40. The method of claim 39, further comprising: encoding the request information and outputting the encoded information for the second Walsh spreading operation. The method of claim 39, wherein the transmission process, Selecting a base station suitable for receiving data by measuring a received signal-to-noise ratio (SNR), and Walsh spreading to transmit SSI information indicating the selection result to the selected base station; Processing the Walsh spread SSI information in a high frequency band and transmitting the same to the base station; And the SSI information is selectively Walsh-spreaded according to the information indicating the presence or absence of an error with respect to the Walsh space information. 48. The method as claimed in claim 47, wherein the SSI information is Walsh spread by a 2-ary Walsh function according to information indicating whether an error exists in the Walsh space information. The method of claim 45, wherein the transmission process, Selecting a base station suitable for receiving data by measuring a received signal-to-noise ratio (SNR), and encoding SSI information indicating the selection result with the selected base station; Repeating the bit representing information indicating whether there is an error with the Walsh space information by a preset number; Time division multiplexing the encoded SSI information and the bit repeated information; And processing the time division multiplexed information in a high frequency band and transmitting the same to the base station.