KR101126360B1 - Method and Apparatus for Determining Data Transmission Rate in Wireless Communication System - Google Patents

Abstract

In the wireless communication system of the present invention, a data rate determining method includes a data rate data format set for a symbol error rate value for each rate in a method of determining a data rate of a high speed data channel at a receiving end of a wireless communication system. ) Is 1, and if the data rate data format is 1, a rate having the minimum value among the symbol error rates is selected according to the result of the determination of the cyclic redundancy check or the quality bit check on the rate and compared with the threshold value set. Selecting a final rate according to the result, and selecting a rate having a minimum value among symbol error rate values if the transmission rate data format is not 1, and determining the final rate according to the cyclic redundancy check determination of the selected rate. do.

Rate, Rate, CRC, SER, RC, Quality Bits

Description

Method and apparatus for determining data transmission rate in wireless communication system {Method and Apparatus for Determining Data Transmission Rate in Wireless Communication System}             

1 is a block diagram schematically illustrating a specific part of a transmitting and receiving end of a general wireless communication system;

2 is a block diagram showing a preferred embodiment of a data rate determining apparatus according to the present invention;

3 is a flowchart showing a preferred embodiment of a data rate determining method according to the present invention;

4 is a flow diagram illustrating in more detail an example of the further correction step of FIG. 3; and

5 is a flow diagram illustrating another example of the further correction step of FIG. 3 in more detail.

The present invention relates to a wireless communication system, and more particularly, to a transmission rate determining method for data received at a receiving side of a wireless communication system.

Existing IS-95 family (or JSTD-008) Code Division Multiple Access (CDMA) systems focus on voice services and perform low-rate data services. In the IS-95 family CDMA system, when data is transmitted from a transmitting end, the data rate is changed according to the quantity of data, which is called a variable rate service. In order to perform the variable rate service as described above, a data rate for a frame received at the receiving end must be determined.

In addition, both the forward and reverse links of the IS-95 family perform variable rate services. In the IS-95 family (or JSTD-008) CDMA system, transmission at 9,6 kbps (or 14.4 kbps) is called full-rate, 4.8 kbps (or 7.2 kbps), 2.4 kbps (or 3.6 kbps). The transmission rate at 1.2kbps (or 1.8kbps) is called half-rate, quarter-rate, and aeighth-rate, respectively. For each case, the rate of modulation symbols is the same at 19.2 kbps. This is because symbol repetition is performed to fit the encoded data to 19.2 kbps.

In the case of the forward link in the IS-95 family (or JSTD-008) CDMA system, all repeated symbols are transmitted, but in the reverse link, time is turned on / off.

If the rate is full-rate, all symbols are sent, but half-rate, quarter-rate, and ace In the case of (1/8) rate, only 8PCG, 4PCG, and 2PCG are transmitted for 16 Power Control Groups (PCGs).

The transmitted signal is received by the demodulator of the receiver and transmits the modulated symbol to the decoder of the receiver. The decoder performs blind detection to determine the data rate for the frame.

1 is a block diagram schematically illustrating a specific portion of a transmitting and receiving end of a general wireless communication system.

Referring to FIG. 1, information input to the encoder 1 is input at a variable data rate, and the number of data input for each frame is different. For example, in an IS-95 CDMA system, 172 bits per 20 ms frame at full (1) rate, 80 bits per 20 ms frame at half (1/2) rate, 40 bits per 20 ms frame at quarter (1/4) rate, and finally At the write (1/8) rate, 16 bits per 20ms frame are transmitted.

Each data input as described above is encoded by the encoder 1 and input to the iterator 2. At this time, the repeater 2 immediately outputs the input data if it is full rate. The iterator 2 performs symbol repetition 1, 3, 7 times corresponding to each corresponding rate if the input data is any one of a half rate, a quarter rate, and an ace rate. As a result of this process, the input data has the same symbol rate as the full rate.

The data output from the repeater 2 is input to an interleaver 3. At this time, the interleaver 3 interleaves the input data and outputs the interleaved data. The modulator 3 modulates the interleaved signal in the interleaver 3 and is then transmitted through the antenna ANT1.

The transmitted signal is input to the demodulator 5 through the antenna ANT2 of the receiving end and demodulated. The demodulated signal and the soft decision symbol of the demodulator 5 are input to the decoder 6 and decoded. .

The decoder 6 is provided with a restoration path for restoring the input data according to the data rate. That is, the decoder 6 has a 1 Viterbi decoder, a 1/2 Viterbi decoder, a 1/4 Viterbi decoder, and a 1/8 Viterbi decoder according to the data rate. Accordingly, the 1 Viterbi decoder decodes the input symbol into full symbols, and the 1/2 Viterbi decoder, 1/4 Viterbi decoder, and 1/8 Viterbi decoder respectively decode the input symbols at half rate, quarter rate, And decode into an Ace Rate symbol, respectively.

At this time, the decoder 6 re-encodes the decoded bits to obtain a symbol error rate (SER), and uses the cyclic redundancy check (CRC) and the Yamamoto quality metric. Determine the rate of

By the way, in the prior art as described above, the SER value and the CRC value are used to determine the data rate, and the priority thereof is given to the CRC. However, there is a case in which the CRC is determined to be good even if it is not properly decoded due to the probabilistic nature of the CRC. Actual experiments show that depending on the number of bits used for CRC checking, the probability is 1/64 for 6 bits, 1/256 for 8 bits, 1/4096 for 12 bits, and the CRC The result was confirmed to be good. If the CRC is found to be good at the rate that was originally transmitted, but the CRC is found to be good together at the other rate, it is not a problem because one of the two is selected using the SER value.

However, if the channel environment is poor and the CRC is not good (Bad) at the original data rate, and if the CRC is found to be good for the same reason at another rate, the decoder 6 will respond without further confirmation. The symbol is judged at the wrong data rate. In this case, there is a problem in that an additional work for correcting an error is required on a higher communication layer, thereby lowering the overall efficiency of the system. Accordingly, it is necessary to reduce the occurrence of such data rate determination error.

According to Korean Patent Application No. 2004-13594 proposed to solve this problem, in order to reduce data rate determination error, the CRC is checked by comparing the SER values for each rate in order and selecting the rate having the lowest SER value. The final data rate is then determined.

However, when determining the data rate through the rate with the lowest SER value, the average of the SER values may vary depending on the rate and the RC (Radio Configuration) value. RC is a data rate data format indicating the maximum data rate that can be transmitted. In general, the higher the number of RCs, the higher the transmission data rate. For example, if RC is 1, the maximum baud rate is 9,600 bps; if RC is 2, the maximum baud rate is 14,400 bps; if RC is 3, the maximum baud rate is 153.6 kbps; if RC is 4, the maximum baud rate is 307.2. kbps. If RC is 5, the maximum transmission rate is 230.4kbps.

In addition, when RC is 1, since the encoder is performed without checking the CRC at the quarter (1/4) rate and the ace (1/8) rate, the invention of Korean Patent Application No. 2004-13594 is not applied. .

An object of the present invention for solving the above problems is to provide a data rate determining method and apparatus for determining a more accurate data rate from the characteristics of the data actually received.

Another object of the present invention is to provide a data rate determining method and apparatus capable of more accurate data rate determination in consideration of all data rates transmitted from a transmitting side.

According to an embodiment of the present invention, in the method of determining a transmission rate of a high speed data channel at a receiving end of a wireless communication system, a) a transmission rate data format set for a symbol error rate value for each rate Determining whether RC) is 1, b) if the data rate data format is 1, and selecting a rate having a minimum value among symbol error rates according to a result of a cyclic redundancy check or a quality bit check on a rate; Selecting a final rate according to a result of comparison with a threshold value, and c) if the transmission rate data format is not 1, selecting a rate having a minimum value among symbol error rate values according to the cyclic redundancy check determination of the selected rate. Achieved by a rate determining method comprising determining a final rate.

Preferably, the transmission rate determination method of the present embodiment further includes correcting the symbol error rate value for each rate to an average value of symbol error rate values after decoding is performed before step a).

In step c), after further correcting the corrected symbol error rate values according to the determination result of the cyclic redundancy check or the quality bit check, the rate having the minimum value among the further corrected symbol error rates is selected.

Advantageously, in step b), said cyclic redundancy check is applied if the rate is a full (1/1) rate and a half (1/2) rate, and said quality bit check is a rate Is applied at the Quarter (1/4) rate and the Eighth (1/8) rate.

Preferably, if the cyclic redundancy check result is true, the corrected symbol rate value is further corrected by subtracting the value set for the corresponding data rate data format from the corrected symbol error rate value. If the result of the cyclic redundancy check is false, the corrected symbol rate value is further corrected by adding a value set for the corresponding data rate data format to the corrected symbol error rate value.

Preferably, if the quality bit check result is true, the corrected symbol rate value is further corrected by subtracting the value set for the corresponding data rate data format from the corrected symbol error rate value. If the quality bit check result is false, the corrected symbol rate value is further corrected by adding a value set for the corresponding data rate data format to the corrected symbol error rate value.

In the step b), if the symbol error rate value of the selected rate is smaller than the set threshold, the selected rate is finally determined as the transmission rate. If the symbol error rate value of the selected rate is larger than the set threshold, the selected rate is finalized as the blank rate. To judge.

In step c), if the cyclic redundancy check result of the selected rate is true, the selected rate is finally determined as the transmission rate. Further, if the cyclic redundancy check result of the selected rate is false, the selected rate is finally determined as the blank rate.

On the other hand, the above object is, according to an embodiment of the present invention, in the method of determining the transmission rate of the high-speed data channel at the receiving end of the wireless communication system, after decoding is performed, the symbol error rate value for each rate to the symbol error rate value Correcting the symbol error rate values according to the determination result of the cyclic redundancy check or the quality bit check for the rate if the set transmission data format (RC) of the corrected symbol error rate values is 1; Further correcting, selecting a rate having a minimum value among the additionally corrected symbol error rates, and selecting a final rate as the transmission rate if the symbol error rate value of the selected rate is smaller than a set threshold; It is achieved by a transmission rate determination method comprising a.

On the other hand, the above object is, according to an embodiment of the present invention, in the method of determining the transmission rate of the high-speed data channel in the receiving end of the wireless communication system, after decoding is performed, the symbol error rate value for each rate to the symbol error rate Correcting to an average value of the values; selecting a rate having a minimum value among the corrected symbol error rate values when the set transmission data format (RC) of the corrected symbol error rate values is greater than 1, the selected And performing a cyclic redundancy check of the rate, and if the result of the cyclic redundancy check of the selected rate is true, finally determining the selected rate as the transmission rate.

On the other hand, the above object is, according to an embodiment of the present invention, in the apparatus for determining the transmission rate of the high-speed data channel at the receiving end of the wireless communication system, after decoding the input signal for each rate, based on the decoding result A decoding unit for outputting a symbol error rate, a cyclic redundancy check, and a quality bit result value for each rate, and a cyclic redundancy check for a rate if a radio data format (RC) set for each symbol error rate value is 1 Or selecting a rate having a minimum value among the symbol error rates according to the result value of the quality bit, and selecting a final rate according to a comparison result with a set threshold value, and if the transmission rate data format is not 1, among the symbol error rate values Select the rate with the lowest value to determine the final rate based on the cyclic redundancy check of the selected rate Is achieved by the device comprising a microprocessor.

According to the present invention, first, after correcting to the average value of the symbol error rate (SER), and then comparing the data rate (RC) corresponding to the case of the case of 1 and not to select a rate having a minimum SER if RC is not 1 The rate is determined according to the cyclic redundancy check (CRC), and if RC is 1, the SER is further corrected and the rate having the minimum SER is selected to determine the rate according to the comparison result with the threshold value. Regardless of the rate, more accurate data rates can be determined.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

In the present invention, when detecting a blind rate in a receiver of a wireless communication system, the symbol error rate (SER) is first checked, and then the SER value is corrected to have the same average value according to RC or rate, and then the CRC is checked to correct blindness. It is proposed to detect the rate.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the present invention.

2 is a block diagram showing a preferred embodiment of a data rate determining apparatus according to the present invention.

Referring to FIG. 2, the data rate determining apparatus according to the present invention includes a receiver 110 for receiving a radio signal through an antenna and an analog / digital signal for converting an output signal of the receiver 110 into a baseband digital signal. PN that correlates the analog / digital: A / D) converter 120 with the output signal of the analog / digital converter 120 and the local PN code provided by the local pseudo noise (PN) code generator (not shown). The output signal of the correlator 130 and the PN correlator 130 and the channel correlator 140 correlating the output signal of the PN correlator 130 with the Walsh code assigned to the corresponding channel are output by low-band filtering. The coherent detector 160 and the coherent detector 160 which perform phase shift and signal attenuation on the output signal of the channel correlator 140 by using the pilot filter 150, and the output of the coherent detector 160. Input each signal to decode and decode the decoding result. After receiving the SER by encoding and checking the SER, a plurality of decoders 172 to 178 that check the CRC, and a plurality of decoders 172 to 178 receive the test results (SER and CRC) and the decoded bits to determine a data transmission rate. It consists of a microprocessor 180.

The operation of the apparatus for determining a transmission rate of a high speed data channel in the wireless communication system according to the present invention configured as described above is as follows.

Referring to FIG. 2, the receiver 110 converts the received RF CDMA signal into a baseband signal and outputs it to the A / D converter 120. The A / D converter 120 converts the baseband signal into a digital signal. To convert.

The baseband signal is then input to the PN correlator 130 and correlated with the PN code generated from the PN code generator to the channel correlator 140 and the pilot filter 150. The channel correlator 140 correlates the Walsh code assigned to the channel to output the data of the channel to the coherent detector 160.

Meanwhile, since the signal input to the pilot filter 150 is low pass filtered and then input to the coherent detector 160, the coherent detector 36 performs phase shift and attenuation of the signal with respect to the signal generated by the channel environment. Removed using pilot filter 150 output. The output of the coherent detector 160 is input to the decoders 172, 174, 176, and 178 corresponding to 1x, 2x, 4x, and 8x, respectively.

Each decoder 172, 174, 176, 178 decodes and encodes the output signal by removing the phase shift and signal attenuation from the coherent detector 150, examines the SER and CRC, and then outputs the result (SER and CRC) and the decoded bits to the microprocessor. Enter in (180). In addition, the decoders 172, 174, 176, and 178 input the quality bits extracted according to the decoding result of each input signal to the microprocessor 180.

Then, the microprocessor 180 calculates an average value of the input SER values and then corrects the SER values with the calculated average value. At this time, the microprocessor 180 determines whether RC of the corresponding SER value is 1, and performs the corresponding transmission rate determination algorithm according to the result.

That is, when RC is 1, the microprocessor 180 performs additional correction on the corresponding SER according to the result of the CRC or the quality bit. The quality bit is a value that is output as a result of decoding performed by the decoders 172, 174, 176, and 178. The microprocessor 180 selects a rate having the minimum value among the additionally corrected SER values. If the SER value of the selected rate is smaller than the set threshold, the microprocessor 180 determines the selected rate, and if not, determines the blank rate.

On the other hand, if RC is not 1, that is, RC is greater than 1, the microprocessor 180 selects the rate with the minimum SER value and determines whether the CRC of the selected rater is true. The microprocessor 180 determines the selected rate if the CRC of the selected rate is true, and determines the blank rate otherwise.

3 is a flowchart showing a preferred embodiment of a data rate determining method according to the present invention.

First, the microprocessor 180 receives SER values, CRC values, and decoded bits for each rate (1, 1/2, 1/4, 1/8 rate) from the decoders 112, 114, 116, and 118 (S110). . The microprocessor 180 calculates an average value of the SER values for each rate with respect to the received SERs (S120). At this time, the microprocessor 180 corrects each SER value to an average value of the corresponding rates by using a predetermined value according to the corresponding rate and the data rate data format (Radio Configuration: RC) (S130). After correcting the SER values, the microprocessor 180 compares the magnitude of the RC values (S140). Preferably, the microprocessor 180 compares whether the RC value is 1 or not. This is because, in the case where RC is 1, at the quarter rate and the acetate rate, the CRC field is not included in the data and thus the CRC check cannot be performed. Therefore, the transmission rate is determined by distinguishing whether RC is 1 or not.

If the RC value is 1 (RC = 1), the microprocessor 180 further corrects the SER value according to the result of the CRC or the quality bit (S150). That is, in the case of full rate and half rate, the microprocessor 180 corrects the SER value according to the result (true or false) of the CRC. In addition, the microprocessor 180 corrects the SER value according to the result (true or false) of the quality bit in the case of the quota rate and the acetate rate.

After further correcting the SER value, the microprocessor 180 selects a rate having the smallest value among the corrected SER values (S170). At this time, the microprocessor 180 compares the SER value of the selected rate and the set threshold value (S180). If the SER value of the selected rate is smaller than the threshold value, the microprocessor 180 finally determines the data rate as the selected rate (S190).

If the SER value of the rate selected in step S180 is greater than the threshold value, the microprocessor 180 determines that the selected rate is the wrong rate, and determines the transmission rate of the corresponding data as the blank rate (S210).

Using this method, rates where the CRC or quality bit is good, that is, rates that are more likely to have been correctly decoded, will have a lower SER value than other rates and will eventually be selected as the data rate. Will be higher.

On the other hand, if RC is greater than 1 in step S140, the microprocessor 180 selects a rate having the smallest SER value among the SER values (S220). At this time, the microprocessor 180 determines whether the CRC of the selected rate is true (S230).

If the CRC of the selected rate is true, the microprocessor 180 finally determines the data rate as the selected rate (S240). If the CRC of the rate selected in step S230 is false, the microprocessor 180 determines that the selected rate is the wrong rate, and finally determines the transmission rate of the corresponding data as the blank rate (S210).

If the microprocessor 180 determines the CRC first and later determines the SER value, the CRC is likely to misjudge the rate based on only one CRC result even though the CRC may have a good probability even at a wrong rate. There is this.

Therefore, as in the present invention, when the microprocessor 180 determines the SER value first and later determines the CRC value, the probability that the SER value is low at a wrong rate is relatively low, and even if it is wrong, the microprocessor 180 can additionally verify the CRC determination. Therefore, it is possible to make a more accurate determination of the data rate determination, thereby increasing the reliability of the transmission rate determination.

4 is a flowchart illustrating an example of an additional correction step S150 of FIG. 3 in more detail.

First, if RC is 1, the microprocessor 180 determines the result of the CRC (S152). If the result of the CRC is true, the microprocessor 180 further corrects the SER value by subtracting the value determined for the transmission rate data format RC from the SER value (S154).

If the CRC result is false in step S152, the microprocessor 180 further corrects the SER value by adding a value determined for the corresponding RC to the SER value (S156).

FIG. 5 is a flowchart illustrating another example of the further correction step S150 of FIG. 3 in more detail.

First, if RC is 1, the microprocessor 180 determines the result of the quality bit (S162). If the result of the quality bit is true, the microprocessor 180 further corrects the SER value by subtracting the value determined for the transmission rate data format RC from the SER value (S164). If the result of the quality bit is false, the microprocessor 180 further corrects the SER value by adding a value determined for the transmission rate data format RC to the SER value (S166).

Tables 1 and 2 below show simulation results of a process of performing blind rate detection (BRD) in the prior art and the present invention.

Simulation environment:
RC1, RC2, RC3, RC4, RC5
Reference transmission rate: 9.6 kbps (RC 1, 3, 5), 14.4 kbps (RC 2, 4)
Full Rate (Ec / Io = -12dB), 1/2 Rate (-14dB), 1/4 Rate (-15dB), 1/8 Rate (-17dB)
FER (Frame Error Rate) 1% Target

The number of frames that have previously determined the BRD result rate incorrectly Full Rate Half rate Quater rate Eighth Rate RC 1 One 33 21 187 RC 2 23 42 53 132 RC 3 43 20 47 198 RC 4 12 37 23 177 RC 5 3 23 42 207

The number of frames inaccurately determining the BRD result rate according to the present invention. Full Rate Half rate Quater rate Eighth Rate RC 1 0 15 16 58 RC 2 One 12 17 13 RC 3 0 5 7 One RC 4 0 3 9 12 RC 5 0 4 13 7

From the simulation results according to the related art and the present invention, it can be seen that the present invention can significantly reduce the false rate determination that may occur in the decoding process.

In the foregoing, certain preferred embodiments of the present invention have been shown and described. However, the present invention is not limited to the above-described embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention attached to the claims. will be.

According to the present invention, the SER is first corrected to an average value, and then the corresponding RCs are compared to distinguish between 1 and non-RC cases, and if RC is not 1, a rate having a minimum SER is selected to determine a rate according to CRC determination. If the value is 1, the SER is further corrected, and then the rate having the minimum SER is selected to determine the rate according to the comparison result with the threshold value, thereby determining a more accurate transmission rate regardless of the type of rate.

Claims (23)

In the transmission rate determination method of the high-speed data channel at the receiving end of the wireless communication system, a) determining whether a data rate data format (Radio Configuration: RC) set for a symbol error rate value for each rate is 1; b) if the data rate data format is 1, the rate having the minimum value among the symbol error rates is selected according to the result of the determination of the cyclic redundancy check or the quality bit check for the rate, and according to the comparison result with the set threshold value. Selecting a final rate; And c) if the rate data format is not 1, selecting a rate having a minimum value among the symbol error rate values and determining a final rate according to the cyclic redundancy check determination of the selected rate; Rate determination method. The method of claim 1, Before step a), And after the decoding is performed, correcting a symbol error rate value for each rate to an average value of the symbol error rate values. 3. The method of claim 2, In step c), According to the determination result of the cyclic redundancy check or the quality bit check, after further correcting the corrected symbol error rate values, selecting a rate having a minimum value among the additional corrected symbol error rates. Transmission rate determination method. The method of claim 1, And wherein the cyclic redundancy check in step b) is applied when the rate is a full (1/1) rate and a half (1/2) rate. The method according to claim 1 or 4, And the quality bit check in step b) is applied when the rate is a Quarter (1/4) rate and an Eighth (1/8) rate. The method of claim 3, If the cyclic redundancy check result is true, the corrected symbol rate value is further corrected by subtracting the value set for the corresponding data rate data format from the corrected symbol error rate value, And if the cyclic redundancy check result is false, further correcting the corrected symbol rate value by adding a value set for the corresponding data rate data format to the corrected symbol error rate value. The method of claim 3, If the quality bit check result is true, the corrected symbol rate value is further corrected by subtracting the value set for the corresponding data rate data format from the corrected symbol error rate value, And if the quality bit check result is false, further correcting the corrected symbol rate value by adding a value set for the corresponding data rate data format to the corrected symbol error rate value. The method of claim 1, In step b), If the symbol error rate value of the selected rate is less than the set threshold, the selected rate is finally determined as the transmission rate. If the symbol error rate value of the selected rate is greater than the set threshold value, the selected rate is finalized as a blank rate. The transmission rate determination method, characterized in that the judging. The method of claim 1, In step c), If the cyclic redundancy check result of the selected rate is true, the selected rate is finally determined as the transmission rate, And if the cyclic redundancy check result of the selected rate is false, finally determining the selected rate as a blank rate. In the transmission rate determination method of the high-speed data channel at the receiving end of the wireless communication system, Correcting a symbol error rate value for each rate with an average value of the symbol error rate values; If the set transmission rate data format (RC) of the corrected symbol error rate values is 1, the corrected symbol error rate values are further corrected according to a determination result of cyclic redundancy check or quality bit check for the rate. Making; Selecting a rate having a minimum value among the further corrected symbol error rates; And And selecting a final rate based on the selected rate if the symbol error rate value of the selected rate is smaller than a predetermined threshold. The method of claim 10, The cyclic redundancy check in the further correction step is applied when the rate is a full (1/1) rate and a half (1/2) rate. The method of claim 10, The quality bit check in the further correction step is applied when the rate is a Quarter (1/4) rate and an Eighth (1/8) rate. The method of claim 10, The further correction step, If the cyclic redundancy check result is true, the corrected symbol rate value is further corrected by subtracting the value set for the corresponding data rate data format from the corrected symbol error rate value, And if the cyclic redundancy check result is false, further correcting the corrected symbol rate value by adding a value set for the corresponding data rate data format to the corrected symbol error rate value. The method of claim 10, The further correction step, If the quality bit check result is true, the corrected symbol rate value is further corrected by subtracting the value set for the corresponding data rate data format from the corrected symbol error rate value, And if the quality bit check result is false, further correcting the corrected symbol rate value by adding a value set for the corresponding data rate data format to the corrected symbol error rate value. In the transmission rate determination method of the high-speed data channel at the receiving end of the wireless communication system, Correcting a symbol error rate value for each rate with an average of the symbol error rate values; Selecting a rate having a minimum value among the corrected symbol error rate values when the set transmission data format (RC) of the corrected symbol error rate values is greater than 1; Performing a cyclic redundancy check of the selected rate; And And if the result of the cyclic redundancy check of the selected rate is true, finally determining the selected rate as the transmission rate. An apparatus for determining a transmission rate of a high speed data channel at a receiving end of a wireless communication system, A decoding unit for outputting a symbol error rate for each rate, a cyclic redundancy check, and a quality bit result value; And If the rate data format (Radio Configuration: RC) set for each of the symbol error rate values is 1, the symbol error rate has a minimum value among the symbol error rates according to the result of the cyclic redundancy check or the quality bit. Selecting a rate and selecting a final rate according to a comparison result with a set threshold value, and if the transmission rate data format is not 1, selecting a rate having a minimum value among the symbol error rate values to overlap the cyclic redundancy of the selected rate. And a microprocessor for determining a final rate according to the inspection determination. The method of claim 16, And after the decoding is performed, the microprocessor corrects a symbol error rate value for each rate to an average value of the symbol error rate values. The method of claim 17, The microprocessor further corrects the corrected symbol error rate values according to the cyclic redundancy check or the quality bit result, and then selects a rate having the minimum value of the additional corrected symbol error rates. Said device. The method of claim 16, The microprocessor applies the cyclic redundancy check if the rate is a full (1/1) rate and a half (1/2) rate, and the rate is a quarter (1/4) And said quality bit check applies in case of rate and eighth (1/8) rate. The method of claim 18, The microprocessor, If the cyclic redundancy check result is true, the corrected symbol rate value is further corrected by subtracting the value set for the corresponding data rate data format from the corrected symbol error rate value, And if the cyclic redundancy check result is false, add the value set for the corresponding data rate data format to the corrected symbol error rate value to further correct the corrected symbol rate value. The method of claim 18, The microprocessor, If the quality bit check result is true, the corrected symbol rate value is further corrected by subtracting the value set for the corresponding data rate data format from the corrected symbol error rate value, And if the quality bit check result is false, add the value set for the corresponding data rate data format to the corrected symbol error rate value to further correct the corrected symbol rate value. The method of claim 16, The microprocessor, If the symbol error rate value of the selected rate is less than the set threshold, the selected rate is finally determined as the transmission rate. If the symbol error rate value of the selected rate is greater than the set threshold value, the selected rate is finalized as a blank rate. Determining the device. The method of claim 16, The microprocessor, If the cyclic redundancy check result of the selected rate is true, the selected rate is finally determined as the transmission rate, And if the cyclic redundancy check result of the selected rate is false, finally determining the selected rate as a blank rate.

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