KR100819290B1 - Apparatus for transmitting/receiving high speed-shared control channel in communication system using high speed downlink packet access scheme and method thereof - Google Patents

Abstract

The present invention relates to an apparatus and method for transmitting and receiving a fast common control channel in a communication system using a fast forward packet access method, the control for the user terminal to receive a common channel signal to which a data packet for a specific user terminal is transmitted. The information is classified into a predetermined number of parts according to the urgency, and generated when the first part having the highest priority urgency among the predetermined number of parts is transmitted. Block coding one part, generating a first CRC corresponding to the first part, and block coding the first part using a second block coding scheme that is set in advance, and following the first part of the predetermined number of parts. When a second part having a priority urgency is transmitted, a second CRC corresponding to the second part is added and preset. After convolutional coding the second part using a convolutional coding scheme, multiplexing the first block coded and second block coded signals and the convolutional coded signal to correspond to the fast common control channel slot format To transmit.

HS-SHCCH, TrCH ID, TBSS, RV, Initial Transmission, Retransmission, Encoding, Decoding

Description

Apparatus and method for high speed common control channel transmission / reception in a communication system using a high speed forward packet access method             

1 illustrates a common control channel structure of a communication system using a conventional high speed forward access method.

2 is a diagram illustrating an example of allocating an OVSF code in a typical high speed forward packet access communication system;

3 illustrates a common control channel transmitter structure of a communication system using a conventional high speed forward packet access scheme.

4 illustrates a common control channel receiver structure of a communication system using a conventional high speed forward packet access scheme.

5 illustrates forward channels in a communication system using a high speed forward packet access scheme;

6 is a diagram illustrating a structure for allocating fast forward common channel indicator information in a communication system using a fast forward packet access scheme;                 

7A-7C illustrate examples of a common control channel structure of a communication system using a high speed forward access method according to an embodiment of the present invention.

8A-8C illustrate examples of a common control channel structure of a communication system using a high speed forward access method according to another embodiment of the present invention.

9 is a diagram illustrating a structure of a transmitter for common control channel transmission of a communication system using a fast forward packet access method for performing a function in a first embodiment of the present invention.

FIG. 10 is a diagram illustrating a structure of a receiver for common control channel transmission of a communication system using a fast forward packet access method for performing a function in a first embodiment of the present invention.

11 is a signal flow diagram illustrating a process of transmitting a common control channel signal in a communication system using a fast forward packet access scheme according to a first embodiment of the present invention.

12 is a signal flow diagram illustrating a process of receiving a common control channel signal in a communication system using a fast forward packet access scheme according to a first embodiment of the present invention.

FIG. 13 is a diagram illustrating a structure of a transmitter for common control channel transmission of a communication system using a fast forward packet access method for performing a function in a second embodiment of the present invention.

14 is a diagram illustrating a structure of a receiver for common control channel transmission of a communication system using a fast forward packet access method for performing a function in a second embodiment of the present invention.                 

15 is a signal flow diagram illustrating a process of transmitting a common control channel signal in a communication system using a fast forward packet access scheme according to a second embodiment of the present invention.

16 is a signal flowchart illustrating a process of receiving a common control channel signal in a communication system using a fast forward packet access method according to an embodiment of the present invention.

17 is a diagram illustrating an encoding process during initial transmission according to the first embodiment of the present invention.

18 is a diagram illustrating an encoding process at the time of retransmission according to the first embodiment of the present invention.

19 is a diagram illustrating an encoding process during initial transmission according to a second embodiment of the present invention.

20 is a diagram illustrating an encoding process at the time of retransmission according to the second embodiment of the present invention.

21 is a diagram illustrating an encoding process during initial transmission in consideration of a common field according to the first embodiment of the present invention.

22 is a diagram illustrating an encoding process upon retransmission when the common field according to the first embodiment of the present invention is considered.

FIG. 23 is a diagram illustrating an encoding process during initial transmission in consideration of a common field according to a second embodiment of the present invention. FIG.

24 is a diagram illustrating an encoding process upon retransmission when the common field according to the second embodiment of the present invention is considered.

The present invention relates to a communication system using a fast forward packet access method, and more particularly, to an apparatus and method for transmitting and receiving control information through a common control channel.

Mobile communication systems are gradually evolving from high-speed voice data-oriented services to high-speed, high-quality wireless data packet communication systems for providing data and multimedia services. High speed downlink packet access (HSDPA) and 1xEV-DV standardization currently underway around 3GPP and 3GPP2 are standardized in 3G mobile communication systems. It can be seen as a typical proof of the effort to find a solution for the wireless data packet transmission service of the 4th generation, the fourth generation mobile communication system has been developed based on the provision of high-speed, high-quality multimedia services beyond that.

In general, the HSDPA method is a high speed downlink shared channel (HS-DSCH, hereinafter referred to as HS-DSCH), which is a forward data channel for supporting forward high speed packet data transmission in a universal mobile terrestrial system (UMTS) communication system. A data transmission method including a control channel associated with the same, and a control channel associated with it, is referred to as an adaptive modulation and coding scheme (AMC) and a complex retransmission scheme (hereinafter referred to as "AMC") to support the HSDPA. Hybrid Automatic Retransmission Request (hereinafter referred to as "HARQ") has been proposed.

First, the AMC scheme will be described.

The AMC scheme modulates different data channels according to channel conditions between a specific base station (Node B, hereinafter referred to as "Node B") and a user terminal (UE: User Element, hereinafter referred to as "UE"). Determining a method and a coding method, it refers to a data transmission method for improving the use efficiency of the entire base station. Accordingly, the AMC scheme has a plurality of modulation schemes and a plurality of coding schemes, and modulates and codes a data channel signal by combining the modulation schemes and coding schemes. Typically, each of the combinations of modulation schemes and coding schemes is referred to as a modulation and coding scheme (hereinafter, referred to as "MCS"), and level n to level n depending on the number of MCSs. Up to a plurality of MCSs can be defined. That is, the AMC scheme is to adaptively determine the level of the MCS according to the channel state between the UE and the Node B which is currently wirelessly connected, thereby improving overall Node B system efficiency.

Thus, the AMC scheme changes the modulation scheme and the coding rate of the channel coder according to the change of the forward channel environment. The forward link channel environment is generally known by measuring a signal-to-noise ratio (SNR) at a UE and transmitting information about the signal to a base station through a reverse link. Based on this, the environment of the forward channel is predicted, and based on the predicted forward channel environment, the appropriate modulation scheme and the coding rate of the channel encoder are set. In this case, for example, QPSK, 8PSK, 16QAM, and 64QAM are considered as the modulation schemes, and coding rates of 1/4, 1/2, and 3/4 are considered as coding rates of the channel encoder. Therefore, in the system using the AMC scheme, a UE having a good channel environment, such as a UE located at a short distance from the base station, applies a higher-order modulation scheme (16QAM, 64QAM) and a higher coding rate (3/4). In case of a UE located far from the center of a base station, that is, located at a boundary point of a cell, a low order modulation scheme and a low coding rate (1/2) are applied. It also improves the performance of the system on average by reducing the interference signal compared to the conventional method, which used to rely on high-speed power control.

Secondly, the HARQ scheme will be described.

In the HARQ scheme, when an error occurs in an initially transmitted data packet, retransmission of the data packet is required to compensate for the failed data packet, which means a predetermined link control scheme used. . The HARQ scheme includes a Chase Combining (CC) scheme, a Full Incremental Redundancy (FIR) scheme, and a partial redundancy increase (PIR: scheme). Partial Incremental Redundancy, hereinafter referred to as "PIR").

In the CC method, a data packet identical to a data packet having an error during initial transmission is simply transmitted when retransmitting, and the receiving end combines the retransmitted data packet and the initially transmitted data packet stored in the reception buffer. By combining, the reliability of the coded bits input to the decoder can be improved to obtain an overall system performance gain. Here, combining the same two data packets, that is, the initially transmitted data packet and the retransmitted data packet, has an effect similar to that of repetition coding, and thus an average performance gain of about 3 dB can be obtained. .

The FIR scheme does not retransmit the same packet as the data packet having an error during initial transmission, but instead transmits a data packet consisting of redundancy bits generated by a channel encoder instead of the same data packet. This is a way to improve performance. That is, the decoder uses the new received redundancy bits as well as the information received during the initial transmission during decoding, thereby reducing the coding rate, thereby increasing the performance of the decoder.

As described above, in order to support the HSDPA scheme, new schemes such as the AMC scheme and the HARQ scheme must be supported, and new control information not transmitted in the existing UMTS system must be exchanged between the UE and the base station. As such, control information to be newly transmitted in order to support the HSDPA scheme is transmitted through a common control channel (SHCCH), and control information to be transmitted through the SHCCH. This will be described with reference to FIG. 1.

1 is a diagram illustrating a common control channel structure of a communication system using a conventional high speed forward access method.                         

Referring to FIG. 1, the SHCCH slot format includes a transport format and resource related information (TFRI) field and a cyclic redundancy check. (CRC: Cyclic Redundancy Check, hereinafter referred to as CRC ") field and HARQ information field. The SHCCH has a 2 ms period, and the reason for transmitting the SHCCH signal in the 2 ms period is the SHCCH. This is because the unit of data transmission through 3 slots, that is, 2 ms.

The control information transmitted through the SHCCH is as follows.

1) HS-DSCH channelization code information (code info)

2) Modulation scheme (MS) information hereinafter referred to as "MS"

3) Transport Block Set Size (TBSS) Information (TBSS)

4) Transport channel indicator (TrCH ID: Transport Channel Identity, hereinafter referred to as TrCH ID ") information

5) UE specific CRC information

6) HARQ Process ID Information

7) New Data Indicator (NDI) Information

8) Redundancy Version (hereinafter referred to as RV) information

Among the control information transmitted through the SHCCH, the MS information, TBSS information, TrCH ID information, and HS-DSCH channelization code (code info) information will be referred to as TFRI information, and the TFRI information refers to the TFRI field. The HARQ process ID information, the RV, and the NDI are referred to as HARQ information. The HARQ information is transmitted through the HARQ field. Now, the control information will be described in detail.

First, the HS-DSCH channelization code information is described as follows.

The HSDPA communication system that improves communication efficiency by using the AMC scheme and the HARQ scheme is a system that allows a plurality of UEs to share some transmission resources of the entire forward transmission resources. Here, the forward transmission resources include an Orthogonal Variable Spreading Factor (OVSF) code, which is an orthogonal code, and, in the case of the OVSF code, a spreading factor ( If the Spreading Factor (SF) is 16 (SF = 16), 10, 12 or 15 OVSF codes are used for the HSDPA communication system, and if the spreading factor is 32 (SF = 32), 20 OVSF codes are used. It is contemplated to be used in the HSDPA communication system.

Next, a structure of allocating an OVSF code in the HSDPA communication system will be described with reference to FIG. 2.

2 is a diagram illustrating an example of allocating an OVSF code in a typical high speed forward packet access communication system. In particular, FIG. 2 illustrates OVSF code allocation when a spreading factor is 16 (SF = 16).

Referring to FIG. 2, each OVSF codes are shown as C (i, j) according to the location of the code tree. In C (i, j), the variable i represents the spreading coefficient value, and the variable j represents the order from the leftmost in the OVSF code tree. For example, C (16,0) indicates that the spreading factor is 16, and the spreading factor is 16 when the spreading factor is 16 in the OVSF code tree. FIG. 1 assigns 10 OVSF codes to the fast forward packet access communication system from 7th to 16th, that is, C (16.6) to C (16,15) in the OVSF code tree when the spreading factor is 16. The case is shown. The ten OVSF codes may be multiplexed to multiple UEs.

For example, assuming that A, B, and C are any users using the fast forward packet access communication system, i.e., any UEs, four codes for A and five codes for B at any time t0. For C, code multiplexing is possible, such as one code. The number of OVSF codes to allocate to each UE and the location on the OVSF code tree are determined by the Node B, which is determined in consideration of the amount of user data of each of the UEs stored in the Node B.

The OVSF code, which is the HS-DSCH channelization code, is allocated in the same manner as described with reference to FIG. 2. In the current standardization process, 6-bit or 7-bit is allocated to indicate the HS-DSCH channelization code information. Considering the present invention, for convenience of description, it is assumed that the HS-DSCH channelization code information is represented by 7 bits.

Next, MS information will be described secondly among control information transmitted through the SHCCH.                         

As described above, in the AMC scheme, the base station determines the modulation scheme and the coding rate according to the change of the channel state of the forward link, determines the MCS level based on the determined modulation scheme and the coding rate, and determines the determined modulation scheme and the coding rate. Must be sent to the UE. However, in the case of the coding rate, since the UE can identify the information such as the TBSS and the Trch ID, the HS-DSCH channelization code, and the modulation scheme, the base station only needs to transmit information about the modulation scheme to the UE. In the following description, it is assumed that only one bit is allocated as a bit for transmission of modulation scheme information, considering only the case where the modulation scheme is QPSK and 16QAM.

Next, a third TrCH ID will be described among control information transmitted through the SHCCH.

First, a transport channel (TrCH) refers to a set of ways of processing data in a physical channel, and in general, a transport channel (TrCH) is used to determine what data is transmitted through a corresponding transport channel (TrCH). Which channel coding scheme is coded at a coding rate, which size is divided and transmitted (TB size), and a transmission time interval (TTI) is called "TTI". How many TBs are available for transmission. Thus, when there are two different transport channels TrCH, each transport channel TrCH is different in terms of the transport channel Trch. In addition, since a plurality of transport channels (TrCHs) may be multiplexed in time through the same high-speed forward physical common channel (HS-PDSCH: High Speed-Physical Downlink Shared CHannel (hereinafter referred to as HS-PDSCH)), The UE should be able to recognize which transport channel (TrCH) the received HS-PDSCH belongs to at any point, and this is the TrCH ID.

Next, the fourth TBSS of the control information transmitted through the SHCCH will be described.

The TBSS is information that informs the UE so that the base station can calculate the number of bits that are rate matched in the physical layer of the UE. The TBSS indicates the number of TBs transmitted to any UE during one TTI, and the rate matching scheme also indicates that when the physical layer of the base station repeats or punctures user data, Information indicating whether or not in the form. The TBSS is transmitted through a TFRI field as described above, and the rate matching scheme is not separately transmitted to the UE, because the TBSS and the rate matching scheme have a corresponding relationship with each other, so when the TBSS is known, the rate is measured. This is because the matching method is also known. In the following description, it is assumed that 6 bits are allocated to transmit the TBSS and TrCH ID information.

Next, the fifth of the control information transmitted through the SHCCH will be described with respect to RV.

First, when an error occurs in the initially transmitted data packet, the HARQ scheme retransmits a data packet corresponding to the failed data packet to compensate for the error in the data packet. Here, when considering the FIR scheme of the HARQ scheme, a new redundancy bit is generated and transmitted when the data packet is retransmitted. At this time, the UE must correctly inform the indicator of the redundancy bit combination to demodulate the data packet correctly. The control information indicating the indicator of the redundancy bit combination is RV. In the following description, it is assumed that two bits are allocated to transmit the RV information when it is assumed that four puncturing patterns for the redundancy bits are four.

Next, the sixth of the control information transmitted through the SHCCH will be described for the NDI and UE-specific CRC.

The NDI is an indicator indicating whether the transmitted data packet is an initially transmitted data packet or a retransmitted data packet, and it is assumed that 1 bit is allocated to transmit the NDI information. The UE-specific CRC is information for more reliably representing a UE-specific ID. In general, it is assumed that 12 to 16 bits are allocated. Thus, in the SHCCH slot format structure, the CRC field performs an error check on the TFRI field or an error check on the TFRI field and the HARQ field.

Next, a HARQ process ID is described as seventh of control information transmitted through the SHCCH.

The HARQ scheme newly applies the following two methods to increase the transmission efficiency of the ARQ (Automatic Retransmission Request) scheme. In the first method, the HARQ performs retransmission request and response between the UE and the Node B, and the second method temporarily stores the data in error and then combines them with the retransmission data of the corresponding data. will be. In addition, the fast forward packet access scheme has introduced the n-channel SAW HARQ scheme to compensate for the shortcomings of the conventional Stop and Wait ARQ (SAW ARQ) scheme.

In the case of the ARQ method, the next data packet is transmitted only after receiving an ACK for the previous data packet. However, since the next data packet is transmitted only after receiving the ACK for the previous data packet, there may occur a case where the ACK should be waited even though the data packet is currently transmitted. In the n-channel SAW HARQ scheme, a plurality of data packets may be continuously transmitted without receiving an ACK for the previous data packet, thereby improving channel usage efficiency. That is, if n logical channels are established between the UE and the Node B, and each of the n channels can be identified by a specific time or channel number, the UE, which receives the data packet, at any point in time It is possible to know which channel the received data packet is transmitted through, and to take necessary measures such as reconstructing the data packets in the order in which they should be received, or soft combining the data packets. The HARQ Process ID indicating which channel among these n logical channels is transmitted through the data packet.

As described above, the number of bits required to represent control information transmitted through the SHCCH is summarized in Table 1 below. In Table 1, {16, 20} considers a method of attaching one CRC having a length of 16 and a method of attaching two CRCs having a length of 12 and 8 in a method of adding a CRC.

Next, a structure of a SHCCH transmitter in a conventional HSDPA communication system will be described with reference to FIG. 3.

3 is a diagram illustrating a common control channel transmitter structure of a communication system using a conventional high speed forward packet access scheme.

Referring to FIG. 3, before the base station transmits user data through the HS-DSCH, the base station allocates the code allocation unit 302 as the channelization code of the user data. The MS 320 and the code rate to be applied to the user data are determined via the MCS control unit 304. Here, since the coding rate is information that can be identified by the UE by the MS 318, the TrCH ID & TBSS 310, and the channelization code number information 320, the base station does not separately transmit the coding rate. The HARQ controller 306 determines the NDI 316, the HARQ Process ID 314, and the RV 312, and the transport channel & block determiner 308 uses the TrCH ID & TBSS to be used for the user data transmission. Determine 310.

The channelization code number information (channelization code) 320, MS 318, NDI 316, HARQ Process ID 314, RV 312, TrCH ID & TBSS 310 is a multiplexer ( MUX) 322, and the multiplexer 322 receives the input channelization code number information 320, the MS 318, the NDI 316, and the HARQ Process ID 314. ), The RV 312 and the TrCH ID & TBSS 310 are multiplexed into a bit stream corresponding to the SHCCH slot format and output to the CRC coder 324. The CRC coder 324 adds a CRC to a bit stream in which the control information output from the multiplexer 322 is multiplexed and outputs the CRC to a serial to parallel converter 326. The serial / parallel converter 326 converts the bit stream output from the CRC coder 324 into an I bit stream and a Q bit stream in parallel, and then converts the I bit stream into a multiplier 328. Output to multiplier 329.

The multiplier 328 multiplies the I bit stream by the spreading code C _OVSF and outputs the result to the adder 330. The multiplier 329 multiplies the Q bit stream by the spread code C _OVSF and outputs the multiplier 331 to the multiplier 331. Here, the multipliers 328 and 329 operate as a diffuser. The multiplier 331 multiplies the j component by the signal output from the multiplier 329 and outputs the j component to the adder 330. The adder 330 adds the signals output from the multiplier 328 and the multiplier 331 to generate a complex signal and outputs the complex signal to the multiplier 332. The multiplier 332 multiplies the signal output from the adder 330 with a preset scrambling code C _SCRAMBLE and outputs the multiplier 334 to the multiplier 334. Here, the multiplier 332 operates as a scrambler. The multiplier 334 multiplies the signal output from the multiplier 332 with a channel gain and outputs the result to the modulator 336. The modulator 336 inputs the signal output from the multiplier 334, modulates the signal by a modulation scheme preset in the base station, and outputs the modulated signal to a radio frequency (RF) processor 338. The RF processor 338 receives the signal output from the modulator 336, converts the signal into an RF band signal, and transmits the signal over the air through an antenna 340.

Next, the SHCCH receiver structure in a conventional HSDPA communication system will be described with reference to FIG. 4.

4 is a diagram illustrating a common control channel receiver structure of a communication system using a conventional high speed forward packet access scheme.

Referring to FIG. 4, the RF band signal received on the air through the antenna 402 is converted into a baseband signal by the RF processor 404 and output to the demodulator 406. The demodulator 406 inputs the signal output from the RF processor 404, demodulates the demodulation scheme corresponding to the modulation scheme used by the transmitter, that is, the base station, and outputs the demodulation scheme to the multiplier 408. The multiplier 408 multiplies the signal generated by the demodulator 406 with a preset scrambling code, that is, the same scrambling code used by the base station, and outputs the same to the complex to I & Q streams 410. Here, the multiplier 408 operates as a de-scrambler.

The Complex to I & Q streams 410 inputs a signal output from the multiplier 408, that is, a complex signal, and divides the signal into a multiplier 412 and a multiplier 414 respectively. . The multiplier 412 and the multiplier 414 input an I bit stream and a Q bit stream, respectively, and multiply them with a spreading code, that is, a spreading code C _OVSF applied by a base station, to a channel compensator 416. Output Here, the multiplier 412 and the multiplier 414 operate as a de-spreader. The channel compensator 416 compensates for the distortion generated as a signal is transmitted from the base station to the UE through the air phase and outputs the same to the parallel / serial converter 420.

The parallel / serial converter 420 receives a signal output from the channel compensator 416, converts the signal in series, and outputs the serial signal to a CRC decoder 422. The CRC decoder 422 inputs a signal output from the parallel / serial converter 420 to check for a CRC error, and outputs the result to the demultiplexer (DEMUX) 424 when the CRC error does not occur. The demultiplexer 424 demultiplexes the signal output from the CRC decoder 422 to channelization code number information (426), MS 430, NDI 432, and HARQ Process ID 434. , RV 436, TrCH ID 438, and TBSS 440.

As described above, in the communication system using the HSDPA method, in the data packet transmission, the control information as described above is transmitted for the initial transmission and retransmission data packets without separately distinguishing the initial transmission and the retransmission. In consideration of the fields for transmitting the control information separately, unnecessary bits of the radio resources are generated by transmitting the corresponding bits through the fields. That is, considering only the initial transmission, since the puncturing pattern during the initial transmission is determined, it is not a problem for the UE to demodulate the packet data even if the RV information of the control information is not transmitted. In addition, since the TrCH ID 438 and the TBSS 440 do not change during initial transmission and retransmission, it is unnecessary to transmit the TrCH ID and TBSS information in both initial transmission and retransmission. The reason is that when an error occurs in the initially transmitted data packet, the failed data packet is retransmitted through the same transport channel to which the data packet was transmitted in the initial transmission, and the same transport channel is identical. It is because it has TBSS. In this way, the transmission of control information without any consideration of initial transmission and retransmission in data packet transmission causes the waste of radio resources required for transmission of the control information, thereby affecting the overall system capacity. For this reason, the present applicant has filed a Korean patent application P2001-87296 with a method for reducing the number of bits to be transmitted through a common control channel by transmitting necessary control information at each time point in consideration of initial transmission and retransmission. .

Meanwhile, a mobile communication system that transmits and receives a signal through a wireless network has more severe effects of distortion or noise than when transmitting and receiving a signal through a wired network. Therefore, the technology for effectively reducing or eliminating the effects of distortion or noise is very important for the mobile communication system. In particular, when an error occurs during transmission of any one of the channelization code, the modulation scheme, the redundancy version, the presence or absence of new data, the transport ID, the transport block set size, and the complex retransmission process numbers, any one of the control information is transmitted. Correct interpretation of the entire data transmitted on the common channel becomes impossible. Therefore, the method of transmitting and receiving the control information signal reliably should be considered at the transmitter and receiver.

Accordingly, an object of the present invention is to provide an apparatus and method for transmitting minimized control information according to data packet transmission in a communication system using a fast forward packet access scheme.

Another object of the present invention is to provide an apparatus and method for differentially transmitting control information according to importance in a communication system using a high speed forward packet access method.                         

Another object of the present invention is to provide an apparatus and method for maximizing coding gain by minimizing the amount of control information transmitted through a common control channel in a communication system using a fast forward packet access method.

Another object of the present invention is to provide a coding method of a common control channel in a communication system using a high speed forward packet access method.

Another object of the present invention is to provide a decoding method of a common control channel in a communication system using a fast forward packet access method.

It is still another object of the present invention to distinguish between control information that is urgently required and non-timely information among control information transmitted through a common control channel in a communication system using a high-speed forward packet access method, and through different incubation. The present invention provides an apparatus and a method for quickly decoding control information that must be known.

The apparatus of the present invention for achieving the above objects; A high speed common control channel transmitting apparatus in a communication system using a fast forward packet access method, the apparatus comprising: channelization code information allocated to a common channel through which a data packet for a specific user terminal is transmitted, information on a modulation scheme of the data packet, A first coding unit for inputting new data indicator information indicating whether the data packet is initially transmitted or retransmitted and block-coded using a predetermined block coding scheme; and a complex retransmission indicating a logical channel number where the data packet is transmitted. The process ID, the ID of the actual transport channel through which the data packet is transmitted when the data packet is the initial transmission, and the transport block set size information transmitted during one transmission time period of the transport channel, Redundancy bit set for retransmission A second coding unit configured to selectively input redundancy version information indicating a sum to add a CRC, and to code using a predetermined convolutional coding scheme; and the block coded information and convolutional coded information to the high speed common. And a wireless transmitter for multiplexing and transmitting the control channel slot format.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

5 is a diagram illustrating forward channels of a communication system using a fast forward packet access scheme.

Referring to FIG. 5, a communication system using the High Speed Downlink Packet Access (HSDPA) method, for example, a base station Node B in a Release-5 system is a user. Channels transmitted in a downlink to a UE (user equipment (hereinafter referred to as UE)) are forward down dedicated physical channels (DL (DownLINK) _DPCH (Dedicated Physical CHannel), hereinafter DL_DPCH)), HS-SHCCH (Shared Control CHannel, hereinafter referred to as HS-SHCCH "), and HS- Forward Common Channel (HS (High Speed) -DSCH (Downlink Shared CHannel), hereinafter HS-DSCH" It will be called).

The DL_DPCH is a communication system that does not use the existing HSDPA scheme, for example, in addition to the fields defined for supporting a voice service in a Release-99 communication system, an HSDPA data packet to be received through a HS-DSCH to a UE is received. A field for transmitting a fast forward common channel indicator (HI: HS-DSCH Indicator (HI) hereinafter referred to as HI ”) indicating whether there is a new definition is defined. The HI is received by the corresponding UE through the HS-DSCH. Not only indicates whether the HSDPA data packet to be present, but also if there is an HSDPA data packet to be received by the UE, the channelization code of the HS-SHCCH having control information on the HS-DSCH to which the HSDPA packet data is actually transmitted. (channelization code) information may be informed, and some of the HS-DSCH control information may be transmitted through the DL_DPCH, if necessary. However, in general, the HI indicates which HS-SHCCH of a plurality of HS-SHCCHs the UE should receive, and in the case of the HI field, when the HSDPA data packet exists for the UE, the HSDPA data packet exists. Transmitting specific bits indicating the signal, on the contrary, if there is no HSDPA data packet, DTX (Discontinuous Transmission) processing is performed.

On the other hand, as described above, the HS-SHCCH can be set to one or a plurality of base stations, up to four can be set. Therefore, the HS-SHCCH to be received by the corresponding UE, along with information indicating whether there is an HSDPA data packet to be received for the corresponding UE through the HI field of the DL_DPCH, indicates which HS among the four HS-SHCCHs. You must send information indicating whether or not SHCCH is present. Since the number of the HS-SHCCH is up to 4, 2 bits are allocated to the HI field, and a structure of information transmitted through the HI field will be described with reference to FIG. 6 below. The detailed description thereof will be omitted here.

As shown in FIG. 5, the DL_DPCH has a time slot of 0.67 ms in a slot format structure, and the HS-SHCCH has one transmission time interval (TTI: (TTI: Transmission Time Interval, hereinafter referred to as " TTI ", is composed of three time slots, and the HS-DSCH has a length of 2 ms for 1 TTI and is transmitted after a predetermined time after the HS-SHCCH signal is transmitted. As such, the reason why the HS-DSCH signal is transmitted after a predetermined time after the HS-SHCCH signal is transmitted is that the UE reads the HS-SHCCH signal corresponding to the UE and acquires HS-DSCH control information. This is because the HS-DSCH must be read.

Next, the HI information allocation structure will be described with reference to FIG. 6.

6 is a diagram illustrating a structure for allocating fast forward common channel indicator information in a communication system using a fast forward packet access scheme.

Referring to FIG. 6, as described above, the information transmitted through the HI field is allocated to 2 bits, and the HS-SHCCH to be received by the corresponding UE must be informed through the 2 bits. For example, if four HS-SHCCHs are configured in the HSDPA communication system, a number is assigned to each of the four HS-SHCCHs. Since the HI field is composed of 2 bits, the HI field may have a one-to-one correspondence with channel numbers assigned to the four HS-SHCCHs, and a one-to-one correspondence between the four HS-SHCCHs and channel numbers. This is shown in FIG. 6. As shown in FIG. 6, if the 2 bits of HI are 00, the first channel, the 11 may be the second channel, the 01 may be the third channel, and the 10 may be the fourth channel. Therefore, when the HI is not transmitted, that is, DTX processing, it indicates that there is no HSDPA data packet to be transmitted to the UE. When the HI is transmitted to 00, the HSDPA data packet is received through the first HS-SHCCH, and when the HI is transmitted to 11, the HSDPA data packet is received through the second HS-SHCCH. When receiving the HSDPA data packet through the third HS-SHCCH, if the HI is transmitted to 10 indicates to receive the HSDPA data packet through the fourth HS-SHCCH. As a result, it becomes possible to represent five pieces of information using two bits.

5 and 6, the process of actually receiving the HSDPA service by the UE will be described below.

First, the UE demodulates the information bits transmitted in the HI field by receiving the DL_DPCH signal. Here, if the information bits transmitted through the HI field are DTX processed, the UE recognizes that there is no HSDPA data packet to be received, and waits until the next TTI while continuously receiving only the DL_DPCH signal. Meanwhile, when the information bits transmitted through the HI field are transmitted with a specific bit value, the UE recognizes that there is an HSDPA data packet to be received and receives a corresponding HS-SHCCH signal according to the bit value of the HI information bits. The control information necessary for receiving the HS-SHCCH signal corresponding to the UE and demodulating the HS-DSCH signal, that is, the control information such as channelization code information of the HS-DSCH, MS, TBSS, TrCH ID, CRC HARQ, etc. Detect. Finally, the UE demodulates the received HS-DSCH signal using the detected control information to detect an HSDPA data packet. As a result, the UE must detect control information transmitted on the HS-SHCCH in order to demodulate the HS-DSCH signal. That is, as shown in FIG. 5, this means that the UE first receives the DL_DPCH and HS-SHCCH signals to read the control information and then receives the HS-DSCH signal. Thus, the base station controls the transmission start point of the DL_DPCH and the HS-SHCCH signal to be ahead of the HS-DSCH transmission start point.

Next, the HS-SHCCH structure according to an embodiment of the present invention will be described with reference to FIGS. 7A to 7C.

7A to 7C illustrate examples of a common control channel structure of a communication system using a high speed forward access method according to an embodiment of the present invention.

Referring to FIG. 7A, the HS-SHCCH is classified into two parts, namely, part 1 and part 2, and the part 1 includes a channelization code set. ), And the MS is transmitted, and in Part 2, NDI, TBSS & TrCH ID or RV, CRC, and HARQ Process ID are transmitted. In Part 2, a field in which a TBSS & TrCH ID or an RV is transmitted will be defined as a "public field." The reason for transmitting the channelization code set and the MS information in front of the rest of the information is as follows. As described above, since the control information to be transmitted through the HS-SHCCH is used to extract the HSDPA data packet by demodulating the HS-DSCH channel, the information about the channelization code and the modulation scheme used is different information, that is, HARQ information. It is urgently needed compared to these. Therefore, the HS-SHCCH channel is classified into two parts according to whether it is urgent or not.

Meanwhile, whether the information transmitted through the public field is TBSS & TrCH ID information or RV information can be known with the information transmitted through the NDI field located in the field immediately before the public field. That is, if the NDI is N (1: true) at the transmitter side, that is, the base station and the receiver side, that is, the UE, the public field transmits TBSS & TrCH ID information. If the NDI is C (0: false), the public field is Send RV information. This indicates that the NDI is N (1: true), indicating that the transmitted data packet is initial transmission, and that the NDI is C (0: false) indicating that the transmitted data packet is retransmission, so that TBSS is not used during the initial initial transmission. This is because only & TrCH ID information needs to be transmitted only when retransmitting.

Next, referring to FIG. 7B, since the MS is an information bit having a lower level of urgency than the channelization code set, the MS is located in Part 2 and an NDI is inserted into a field where the MS is located. By placing the NDI in Part 1, the UE can quickly determine whether control information to be transmitted through Part 2 is initial transmission or retransmission. In the case of FIG. 7B, it is possible to transmit information having a relatively high urgency in time to the part 1.                     

Next, referring to FIG. 7C, a case where the channelization code set, the MS, and the NDI are all located in Part 1 is illustrated. By placing the MS and NDI in the part 1, it is possible to prevent the delay of the modulation time point, and it is possible to quickly determine whether the data to be placed in the part 2 is initial transmission or retransmission. And, as described above, the location of the control information in each part can be variably set according to the system situation, and the following description will be described with the structure of FIG. 7A.

Referring to FIGS. 7A to 7C, first, assume that the number of bits used for transmitting TBSS & TrCH ID information is N, and the number of bits used for transmitting RV information is M (generally N> M). Assuming that the NSD bits are not used because the HSDPA data packet uses the N bits for initial transmission of the TBSS & TrCH ID information and then transmits only the RV information when retransmitting the HSDPA data packet. Therefore, if the same amount of channelization information is taken into account, the coding gain can be obtained. In consideration of the case where the common field is considered, the redundant N-M bits may be variously used as radio resources. Examples of the use are as follows.

1) Can be used for additional transmission of control information transmitted to other fields

2) Can be used to increase the demodulation probability by inserting certain bits known in advance at the transmitter and receiver.

3) DTX processing

4) Insert Dummy Bit                     

As described above, the control information transmitted through the HS-SHCCH having the example of the slot format structure shown in FIGS. 7A to 7C and the number of information bits allocated to the control information are shown in Table 2 below.

Table 2 below shows the number of information bits required to transmit the same control information as in Table 1, as described in the prior art, which transmits control information regardless of whether the data packet is initially transmitted or retransmitted. It can be seen that 2 bits and 6 bits are reduced to 34 bits at the initial transmission and 30 bits at the retransmission.

8A to 8C illustrate examples of a common control channel structure of a communication system using a high speed forward access method according to another embodiment of the present invention.

Referring to FIG. 8A, the HS-SHCCH is classified into three parts, and in Part 1, a channelization code set, an MS, and an NDI are transmitted. In CRC1 and Part 3, TBSS & TrCH ID or RV, CRC2, and HARQ Process ID are transmitted. Here, the CRC1 is generated by part 1 and used for UE classification and error detection. The CRC1 needs to know urgently because the UE can determine whether it is a channel to be received or not.

Referring to FIG. 8B, the HS-SHCCH is classified into three parts and then implemented in a structure corresponding to FIG. 7B described above. Similarly, FIG. 8C is implemented in a structure corresponding to FIG. 7C. . And as described in Figures 7a to 7c it is a matter of course that the control information is located in each part can be set variably according to the system situation.

Table 3 below shows the control information transmitted through the HS-SHCCH having the example of the slot format structure shown in Figs. 8a to 8c and the number of information bits allocated to the control information.

Meanwhile, whether the transmitted information is TBSS & TrCH ID information or RV information can be known with the information transmitted through the NDI field located in the field immediately before the public field. That is, if NDI is N (1: true) at the transmitter side, i.e., the base station and receiver side, i.e., the UE, the public field transmits TBSS & TrCH ID information, and if the NDI is C (0: false), the common field. Transmits the RV information. This indicates that the NDI is N (1: true), indicating that the transmitted data packet is initial transmission, and that the NDI is C (0: false) indicating that the transmitted data packet is retransmission, so that TBSS is not used during the initial initial transmission. This is because only & TrCH ID information needs to be transmitted only when retransmitting.

Next, the structure of the HS-SHCCH transmitter for performing a function in the first embodiment of the present invention will be described with reference to FIG. 9.

9 is a diagram illustrating a structure of a fast common control channel transmitter of a communication system using a fast forward packet access method for performing a function in a first embodiment of the present invention.

Referring to FIG. 9, before the base station transmits user data through the HS-DSCH, the code allocation unit 902 may use information about the number of codes to be used as a channelization code of the user data. 912 determines, at the MCS control unit 904, the MS 914 and the coding rate to be applied to the user data. Here, since the code rate is information that can be identified by the UE by the MS 914, the TrCH ID & TBSS 922, and the channelization code number information 912, the base station does not transmit the code rate separately. The HARQ controller 906 determines the NDI 916, the HARQ Process ID 918, and the RV 920, and the transport channel & block determiner 908 uses the TrCH ID & TBSS to be used for the user data transmission. Determine 922.

Here, the HARQ control unit 906 determines the information of the RV 920 information and the TrCH ID & TBSS 922 information while determining the NDI 916 information. That is, the base station should inform the UE whether the HSPDA data packet transmitted to the UE is initial transmission or retransmission, and control information indicating whether the initial transmission or retransmission is NDI 916 information. The NDI 916 information is determined according to the HSDPA data packet transmitted by the HARQ control unit 906. At this time, the HARQ control unit 906 determines the NDI 916 for the corresponding HSDPA data packet and at the same time the RV ( It is determined whether to transmit the information or the TrCH ID & TBSS 922. That is, when the transmitted HSDPA data packet is initial transmission, that is, when the NDI 916 information is N (1: true), the TrCH ID & TBSS 922 information is transmitted, and conversely, when the transmitted HSDPA data packet is retransmission, That is, if the NDI 916 information is C (0: false), the RV 720 information is transmitted. At this time, when the HARQ control unit 906 determines to transmit the RV 920 and transmits the TrCH ID & TBSS 922, the HARQ control unit 906 controls the switch 924 according to the determined information to determine the transmission decision information. To be transmitted. Here, the field for transmitting the RV 920 information or the TrCH ID & TBSS 922 information has a structure as shown in FIG. 7C. Meanwhile, the channelization code number information 912, the MS 914 information, and the NDI 916 information are input to the multiplexer 926, and the multiplexer 926 is the input channelization code number information. 912, the MS 914 information, and the NDI 916 information are multiplexed into a bit stream corresponding to the HS-SHCCH slot format shown in FIG. 7C and output to the block coder 932. The block coder 932 performs block coding on the signal output from the multiplexer 926 in a predetermined block coding scheme, as shown in FIGS. 17 and 18 (32, 9) block coding scheme. Output to multiplexer 942.                     

Meanwhile, the HARQ Process ID 918 and the RV 920 or the TrCH ID & TBSS 922 are input to the multiplexer 927, and the multiplexer 927 is the HARQ Process ID 918 and the RV 920. Alternatively, the TrCH ID & TBSS 922 is multiplexed into a bit stream corresponding to the HS-SHCCH slot format as shown in FIG. 7C and output to the CRC adder 924. The CRC adder 924 inputs the signal output from the multiplexer 927 to generate and add the corresponding CRC, and then outputs the CRC to the convolutional coder 938. The convolutional coder 938 inputs a signal output from the CRC adder 924 to input a convolutional coding scheme, that is, a convolution preset as shown in FIGS. 17 and 18. The convolutional coding is performed using the national coding scheme and then output to the rate matching unit 940. Here, since the convolutional coder 938 transmits TrCH ID & TBSS 922 information when the user data to be transmitted from the base station is the initial transmission, the convolutional coder 938 uses the (88, 33) convolutional coding scheme as shown in FIG. 17. When the user data is retransmitted, since the RV 920 information is transmitted, convolutional coding is performed using the convolutional coding method as shown in FIG. 18 and then output to the rate matcher 940 as shown in FIG.

The rate matching unit 940 rate-matches the signal output from the convolutional coder 938 and then outputs the signal to the multiplexer 942. The multiplexer 942 corresponds to a block coded signal output from the block coder 932 and a signal output from the rate matching unit 940 to the HS-SHCCH slot format structure as shown in FIG. 7C. After multiplexing into one bit stream, it is output to a serial to parallel converter 944. The serial / parallel converter 944 converts the bit stream output from the multiplexer 942 into an I bit stream and a Q bit stream in parallel, and then converts the I bit stream into a multiplier 946. Outputs to multiplier 948.

The multiplier 946 multiplies the I bit stream by the spreading code C _OVSF and outputs the result to the adder 950. The multiplier 948 multiplies the Q bit stream by the spreading code C _OVSF and outputs the result to the adder 950. Here, the multipliers 946 and 948 operate as a diffuser. The adder 950 adds the signals output from the multiplier 946 and the multiplier 948 to generate a complex signal and outputs the complex signal to the multiplier 952. The multiplier 952 multiplies the signal output from the adder 950 with a preset scrambling code C _SCRAMBLE and outputs the multiplier 954 to the multiplier 954. Here, the multiplier 954 operates as a scrambler. The multiplier 954 multiplies the signal output from the multiplier 952 by a channel gain and outputs the result to the modulator 956. The modulator 956 inputs a signal output from the multiplier 954, modulates the signal by a modulation scheme preset in the base station, and outputs the modulated signal to a radio frequency (RF) processor 958. The RF processor 958 receives a signal output from the modulator 956, converts the signal into an RF band signal, and transmits the signal over the air through an antenna 960.

Next, an HS-SHCCH receiver structure for performing a function in an embodiment of the present invention will be described with reference to FIG. 10.                     

10 is a diagram illustrating a common control channel receiver structure of a communication system using a fast forward packet access method for performing a function in an embodiment of the present invention.

Referring to FIG. 10, the RF band signal received on the air through the antenna 1002 is converted into a baseband signal by the RF processor 1004 and output to the demodulator 1006. The demodulator 1006 inputs the signal output from the RF processor 1004, demodulates the demodulation scheme corresponding to the modulation scheme used by the transmitter, that is, the base station, and outputs the demodulation scheme to the multiplier 1008. The multiplier 1008 multiplies the signal output from the demodulator 1006 with a preset scrambling code, that is, the same scrambling code used by the base station, and outputs the same to the complex to I & Q streams 1010. Here, the multiplier 1008 operates as a de-scrambler.

The Complex to I & Q streams 1010 inputs a signal output from the multiplier 1008, that is, a complex signal, and divides the signal into an I bit stream and a Q bit stream, and outputs them to a multiplier 1012 and a multiplier 1014, respectively. . The multiplier 1012 and the multiplier 1014 input an I bit stream and a Q bit stream, respectively, and multiply them with a spreading code that is set in advance, that is, a spreading code C _OVSF applied by a base station, and then multiplies the channel compensator 1016. Output Here, the multiplier 1012 and the multiplier 1014 operate as a de-spreader. The channel compensator 1016 compensates for distortion generated as a signal is transmitted from the base station to the UE through the air phase and outputs the same to the parallel / serial converter 1018.

The parallel / serial converter 1018 receives a signal output from the channel compensator 1016, converts the signal in series, and outputs the serial signal to the demultiplexer (DEMUX) 1020. The demultiplexer 1020 demultiplexes an input stream, outputs channelization code number information, the MS, and the NDI to the block decoder 1024, and performs a decoding process and outputs the decoded information to the control information receiver 1034. In addition, the HARQ Process ID, RV, or TrCH ID & TBSS is input to the rate matcher 1028 at the output of the demultiplexer 1020. The signal after the rate matching is output to the Viterbi decoder 1030. The Viterbi decoder 1030 receives an input signal and decodes the received signal based on the code rate of the convolutional coder and outputs the decoded signal to the CRC check unit 1032. The CRC check unit 1032 checks whether there is an error in the transmitted packet, and if the CRC error does not occur as a result of the check, outputs it to the control information receiving unit 1034.

9 and 10, a case in which TrCH ID & TBSS information or RV information is selectively transmitted when the user data transmitted is initial transmission and retransmission will be described with reference to FIGS. 17 and 18. It was. Of course, when considering the case in which the TrCH ID & TBSS information or RV information is transmitted in the common field as described in the present invention, as shown in FIGS. 21 and 22, the information actually transmitted is TrCH ID & TBSS information or RV. The same convolutional coding is applied assuming that other useful information is actually transmitted because it has the same field size regardless of the information, that is, other useful information can be additionally transmitted when the RV information is transmitted. .

Next, the HS-SHCCH signal transmission process corresponding to FIG. 9 in the communication system using the HSDPA scheme will be described with reference to FIG. 11.

11 is a signal flow diagram illustrating a process of transmitting a common control channel signal in a communication system using a fast forward packet access scheme according to another embodiment of the present invention.

Referring to FIG. 11, in step 1104, the base station generates control information for receiving the user data through the HS-DSCH before transmitting the user data through the HS-DSCH. Proceed. The control information may include channelization code number information, MS, NDI, HARQ Process ID, RV, TrCH ID & TBSS information, as described above. In step 1106, the base station proceeds to step 1107 if the control information bits to be transmitted to the corresponding UE are control information to be transmitted through part 1 according to whether data to be transmitted through part 1 or data to be transmitted through part 2 is performed. If the data is to be transmitted through Part 2, the process proceeds to step 1108.

In step 1107, it is checked whether the data packet is the initial transmission (N). If the data packet to be transmitted to the UE is the initial transmission, the base station proceeds to step 1108. In step 1108, the base station selects information to be transmitted as TrCH ID & TBSS information as the data to be burned to the corresponding UE is initial transmission, and determines the RM pattern to be used in step 1113. Here, part 2 will be considered with reference to FIG. 17.

17 is a diagram illustrating an encoding process during initial transmission according to the first embodiment of the present invention. Referring to FIG. 17, when 25 information bits and 8 parity bits enter an input of a convolutional coder having a code rate of 1/3, it can be seen that the number of input bits is 33 and the number of output bits is 99. Here, since the number of bits that can be transmitted through Part 2 is 88 bits, it can be seen that 11 bits must be removed through rate matching during initial transmission. In addition, as shown in FIG. 18, it can be seen that one bit must be repeatedly transmitted through rate matching. 21 and 22 illustrate coding rates for initial transmission and retransmission when the common field is considered. 21 and 22, when the common field is applied, the operation of the rate matcher 1113 of FIG. 11 may be omitted, and the rate matcher 1113 may insert a specific signal repeater or zero insertion. Can be replaced by wealth. If the data packet to be transmitted to the UE is not initial transmission in step 1107, the base station proceeds to step 1109. In step 1109, since the data packet to be transmitted to the corresponding UE is not initial transmission, that is, retransmission, the base station selects information to be transmitted as RV information and determines the RM pattern to be used in step 1113. .

In step 1110, the base station multiplexes the generated control information into one bit stream corresponding to the first slot format of the HS-SHCCH. In step 1111, the base station adds CRC1 to the multiplexed one bit stream, and then proceeds to step 1112. In step 1112, an encoding process is performed on an input signal, and in step 1113, a rate matching is performed using bits corresponding to a slot format. The signal having passed through step 1113 is multiplexed into a bit stream corresponding to the slot of the HS-SHCCH along with the block coded information signal through step 1108 in step 1114 and proceeds to step 1116.

In step 1116, the base station converts the CRC1 added bit stream into an I bit stream and a Q bit stream in parallel, and then proceeds to step 1118. In step 1118, the base station spreads the 1-bit stream and the Q-bit stream with a predetermined spreading code, and then proceeds to step 1120. In step 1120, the base station adds the spread 1 bit stream and the Q bit stream into one complex signal, and then proceeds to step 1122.

In step 1122, the base station scrambles the summed complex signal with a predetermined scrambling code, and then proceeds to step 1124. In step 1124, the base station controls the channel gain by multiplying the scrambled signal by the channel gain preset in the base station, and then proceeds to step 1126. In step 1126, the base station modulates the signal multiplied by the channel gain using a modulation scheme preset in the base station, and then proceeds to step 1128. In step 1128, the base station converts the modulated signal into an RF band signal and proceeds to step 1130. In step 1130, the base station transmits the signal converted into the RF band signal to the air through the antenna and ends.

Next, a process of receiving an HS-SHCCH signal in a communication system using the HSDPA scheme will be described with reference to FIG. 12.

12 is a signal flowchart illustrating a process of receiving a common control channel signal in a communication system using a fast forward packet access method according to an embodiment of the present invention.

Referring to FIG. 12, first, in step 1204, the UE receives data from the air through an antenna and proceeds to step 1206. In step 1206, the UE converts the received signal into a baseband signal and proceeds to step 1208. In step 1208, the UE demodulates the signal converted into the baseband signal by a demodulation method corresponding to the modulation method applied by the transmitter, that is, the base station, and proceeds to step 1210. In step 1210, the UE descrambles the demodulated signal with the same scrambling code applied by the base station, and then proceeds to step 1212. In step 1212, the UE separates the descrambled signal into an I bit stream and a Q bit stream, and then proceeds to step 1214. In step 1214, the UE multiplies the I bit stream and the Q bit stream by the same spreading code as the spreading code applied by the base station, and then proceeds to step 1216.

In step 1216, the UE performs channel compensation on the despread I bit stream and Q bit stream, and then proceeds to step 1218. In step 1218, the UE inputs the I bit stream and the Q bit stream and performs serial conversion, and then proceeds to step 1220. In step 1220, whether the data for part 1 and the data for part 2 is distinguished through demultiplexing, and in step 1222, whether the distinguished data is data for the first part or data for the second part. If it is the first data, the process proceeds to step 1230, and if it is the data for the second part, the process proceeds to step 1224. In step 1224, the derate matching signal is decoded in step 1226 to check for a CRC error in step 1228. In step 1230, the signal is inputted in step 1232 along with the block decoded data to receive the data.

Next, an HS-SHCCH transmitter structure for performing a function in the second embodiment of the present invention will be described with reference to FIG. 13.

13 is a diagram illustrating a fast-common control channel transmitter structure for performing a function in the second embodiment of the present invention.

Referring to FIG. 13, before the base station transmits user data through the HS-DSCH, the code allocation unit 1302 can determine the number of codes used for the channelization code of the user data. 1312, the MCS control unit 1304 determines the MS 1314 and the coding rate to be applied to the user data. Here, the code rate is information that can be identified by the UE by the MS 1314, the TrCH ID & TBSS 1322, and the channelization code number information 1312, so that the base station separately transmits the code rate to the UE. I never do that. The HARQ controller 1306 determines an NDI 1316 indicating whether the user data is initially transmitted or retransmitted, an HARQ Process ID 1318, and an RV 1320, and a transport channel & block determination unit 1308. ) Determines the TrCH ID & TBSS 1322 to be used for the user data transmission.

Here, the HARQ controller 1306 determines the NDI 1316 information and determines which of the RV 1320 information or the TrCH ID & TBSS 1322 information is transmitted. In other words, the base station should inform the UE whether the user data transmitted to the UE, that is, the HSPDA data packet is initial transmission or retransmission, and whether the user data transmitted to the UE is initial transmission or retransmission. Control information is NDI 1316 information. The NDI 1316 information is determined according to the HSDPA data packet transmitted by the HARQ control unit 1306, where the HARQ control unit 1306 determines the NDI 1316 for the corresponding HSDPA data packet and at the same time the RV ( 1320) Whether to transmit the information, or whether to transmit the TrCH ID & TBSS 1322. That is, the HARQ controller 1306 transmits information to be transmitted through a common field as TrCH ID & TBSS 1322 information when the transmitted HSDPA data packet is the initial transmission, that is, when the NDI 1316 information is N (1: true). On the contrary, when the transmitted HSDPA data packet is retransmission, that is, when the NDI 1316 information is C (0: false), it is determined to transmit the information to be transmitted through the common field as the RV 720 information.

In this case, when the HARQ controller 1306 determines to transmit the RV 1320 information or when transmitting the TrCH ID & TBSS 1322 information, the HARQ controller 1306 controls the switch 1324 according to the determined information to transmit the information. The determined information is to be transmitted at that time. Herein, it is assumed that a field in which the RV 1320 information or the TrCH ID & TBSS 1322 information is transmitted is a common field as described above and has a case of having an HS-SHCCH slot format structure as described in FIG. 8A. Shall be. Meanwhile, the channelization code number information 1312, the MS 1314 information, and the NDI 1316 information are input to a multiplexer 1326, and the multiplexer 1326 is the channelization code number information 1312. ), MS 1314 information, and NDI 1316 information are multiplexed according to the HS-SHCCH slot format as shown in FIG. 8A and output as one bit stream.

The bit stream output from the multiplexer 1326 is input to the first CRC adder 1327 and the first block coder 1332, respectively. The first CRC adder 1327 inputs the bit stream output from the multiplexer 1326, calculates and adds the corresponding CRC, and outputs the CRC to the second block coder 1334. The first block coder 1332 is a first block coding scheme preset by inputting a bit stream output from the multiplexer 1326, for example, a block coding scheme as illustrated in FIGS. 19 and 20. After coding, the signal is output to the multiplexer 1342. 19 shows a case in which the user data to be transmitted was the initial transmission, and FIG. 20 shows a case in which the user data was retransmission, and the first block coding as shown in FIGS. 19 and 20. The scheme is a (32,9) block coding scheme. The second block coder 1334 blocks the signal output from the first CRC adder 1327 using a preset second block coding scheme, and then outputs the block coded signal to the multiplexer 1342. Here, the second block coding scheme is a (32, 12) block coding scheme as shown in FIGS. 19 and 20.

Meanwhile, the HARQ Process ID 1318 and the RV 1320 information or the TrCH ID & TBSS 1322 information are input to the multiplexer 1328, and the multiplexer 1328 is connected to the input HARQ Process ID 1318. RV 1320 information or TrCH ID & TBSS 1322 information is multiplexed according to the HS-SHCCH slot format structure shown in FIG. 8A to generate one bitstream and output to the second CRC adder 1336. do. The second CRC adder 1336 inputs a bit stream output from the multiplexer 1328 to generate a corresponding CRC, and then adds it to the convolutional coder 1338. The convolutional coder 1338 inputs the signal output from the second CRC adder 1336 to code the convolutional coding scheme, and outputs the signal to the rate matching unit 1340. In the convolutional coding scheme, as shown in FIG. 19, when the user data to be transmitted is the initial transmission, since the TrCH ID & TBSS 1322 information is transmitted, the convolutional coding scheme is applied (56, 25). As shown in FIG. 20, when the user data to be transmitted is retransmitted, the convolutional coding scheme (56, 21) is applied because the RV 1320 information is transmitted. The rate matcher 1340 inputs a signal output from the convolutional coder 1338, rate matches the signal, and outputs the rate matched signal to the multiplexer 1342.

The multiplexer 1342 receives the signals output from the first block coder 1332, the second block coder 1334, and the rate matcher 1340, and the HS-SHCCH slot as shown in FIG. 8A. Multiplexed according to the format structure and then output to the S / P converter (1344). The serial / parallel converter 1344 converts a signal output from the multiplexer 1342 into two bit streams, that is, an I bit stream and a Q bit stream, and then outputs the I bit stream to a multiplier 1346. The Q bit stream is output to a multiplier 1348.

The multiplier 1346 multiplies the I bit stream by the spreading code C _OVSF and outputs the multiplier 1350 to the adder 1350. The multiplier 1348 multiplies the Q bit stream by the spread code C _OVSF and outputs the multiplier 1349. Here, the multipliers 1346 and 1348 operate as diffusers, respectively. The multiplier 1349 multiplies the signal output from the multiplier 1348 by the j component and outputs the result to the adder 1350. The adder 1350 adds the signals output from the multiplier 1346 and the multiplier 1349 to generate one complex signal and outputs the signal to the multiplier 1352. The multiplier 1352 multiplies the signal output from the adder 1350 with a preset scrambling code C _SCRAMBLE and outputs the multiplier 1354 to the multiplier 1354. Here, the multiplier 1354 operates as a scrambler. The multiplier 1354 multiplies the signal output from the multiplier 1352 by a channel gain, and then outputs the multiplier 1356 to the modulator 1356. The modulator 1356 inputs a signal output from the multiplier 1354, modulates the signal by a modulation scheme preset in the base station, and outputs the modulated signal to an RF (Radio Frequency) processor 1358. The RF processor 1358 receives a signal output from the modulator 1356, converts the signal into an RF band signal, and transmits the signal over the air through an antenna 1360.

Next, the structure of the HS-SHCCH receiver for performing a function in the second embodiment of the present invention will be described with reference to FIG. 14.

FIG. 14 illustrates a structure of a fast-common control channel receiver for performing a function in the second embodiment of the present invention.

Referring to FIG. 14, the RF band signal received on the air through the antenna 1402 is converted into a baseband signal by the RF processor 1404 and output to the demodulator 1406. The demodulator 1406 inputs the signal output from the RF processor 1404, demodulates the demodulation scheme corresponding to the modulation scheme used by the transmitter, that is, the base station, and outputs the demodulation scheme to the multiplier 1408. The multiplier 1408 multiplies the signal output from the demodulator 1406 with a preset scrambling code, that is, the same scrambling code C _SCRAMBLE as the scrambling code used by the base station, and outputs the same to the Complex to I & Q streams 1410. . Here, the multiplier 1408 operates as a de-scrambler.

The Complex to I & Q streams 1410 input a descrambled signal output from the multiplier 1408, that is, a signal of a complex form, and separate the I and Q bit streams into a multiplier 1412 and a multiplier 1414, respectively. Will output The multiplier 1412 and the multiplier 1414 respectively input an I bit stream and a Q bit stream to multiply a spreading code C _OVSF which is the same as a spreading code applied by a base station, and then multiply it to the channel compensator 1416. Output Here, the multiplier 1412 and the multiplier 1414 operate as a de-spreader. The channel compensator 1416 compensates for distortion caused by the transmission of a signal from the base station to the UE on the air and outputs it to a P / S converter 1418. The parallel / serial converter 1418 receives a parallel signal output from the channel compensator 1416, serially converts the signal into one bit stream, and outputs the serial signal to the demultiplexer (DEMUX) 1420.

The demultiplexer 1420 demultiplexes the bit stream output from the parallel / serial converter 1418, and then transmits information transmitted through Part 1, that is, channelization code number information, MS information, and NDI information. Information transmitted to the decoder 1424 and transmitted through part 2, that is, the first CRC to the second block decoder 1426 and transmitted through part 3, that is, HARQ Process ID, RV information or TrCH ID & TBSS information and the second CRC are outputted to the rate matching unit 1428. In the description of FIG. 14, it is assumed that the received HS-SHCCH slot format structure has a structure as shown in FIG. 8A. The first block decoder 1424 includes a channelization code number information output from the demultiplexer 1420, MS information, and NDI information in a first block coding scheme, that is, (32,9) block coding scheme. The decoding is performed in a corresponding decoding scheme and output to the control information receiver 1434. The second block decoder 1426 decodes the first CRC output from the demultiplexer 1420 by a decoding method corresponding to a second block coding scheme applied by the base station, that is, a (32,12) block coding scheme. It outputs to the 1CRC inspection unit 1423. The first CRC checker 1423 receives a signal output from the second block decoder 1426, checks whether a CRC error has occurred, and outputs the signal to the control information receiver 1434.                     

The rate matching unit 1428 rate-matches the signal output from the demultiplexer 1420, that is, the HARQ Process ID, the second CRC and RV information, or the TrCH ID & TBSS information, and then outputs it to the Viterbi decoder 1430. do. The Viterbi decoder 1430 inputs the signal output from the rate matching unit 1428, and is a convolutional coding scheme applied by the base station, that is, (56,25) convolutional coding when the transmission data is the initial transmission. Method, and when the transmission data is retransmission, it is decoded by a decoding method corresponding to the (56,21) convolutional coding method and then output to the CRC checker 1432. The second CRC checker 1432 receives a signal output from the Viterbi decoder 1430, checks whether a CRC error occurs, and outputs the signal to the control information receiver 1434. As a result, the control information receiver 1434 receives control information transmitted from the base station, that is, channelization code number information, MS information and NDI information, HARQ Process ID, RV information, or TrCH ID & TBSS information. Done.

13 and 14, a case in which TrCH ID & TBSS information or RV information is selectively transmitted when the user data transmitted is initial transmission and retransmission will be described with reference to FIGS. 19 and 20. It was. Of course, when the TrCH ID & TBSS information or the RV information is transmitted in the common field as described in the present invention, as shown in FIGS. 23 and 24, the information actually transmitted is TrCH ID & TBSS information or RV. The same convolutional coding is applied assuming that other useful information is actually transmitted because it has the same field size regardless of information, that is, other useful information can be additionally transmitted when the RV information is transmitted. . Considering the case where the number of bits transmitted through the common field is the same, it is not necessary to separately consider the rate matching operation as described with reference to FIGS. 21 and 22.

Next, a process of transmitting HS-SHCCH control information according to the second embodiment of the present invention will be described with reference to FIG. 15.

15 is a flowchart illustrating a process of transmitting fast-common control channel control information according to a second embodiment of the present invention, and in particular, corresponds to the structure of the HS-SHCCH transmitter of FIG. 13 described above.

Referring to FIG. 15, in step 1503, the base station generates control information for allowing the corresponding UE to receive user data through the HS-DSCH before transmitting user data through the HS-DSCH. Proceed. The control information may include channelization code number information, MS, NDI, HARQ Process ID, RV, TrCH ID & TBSS information, as described above. In step 1504, the base station determines whether control information to be transmitted to the corresponding UE is information to be transmitted through part 1. As a result of the check, when the control information to be transmitted through the part 1, that is, the HS-SHCCH slot format structure as shown in FIG. 8A, the control information to be transmitted through the part 1 is channelization code number information, MS, and NDI information. In this case, the base station proceeds to steps 1505 and 1506. In step 1505, the base station generates and adds a first CRC corresponding to channelization code number information, MS, and NDI information to be transmitted through part 1, and then proceeds to step 1508. In step 1508, the base station performs block coding on the first CRC using a predetermined second block coding scheme, that is, (32, 12) block coding scheme as described with reference to FIGS. 19 and 20, and then proceeds to step 1514. do.

In addition, in step 1505, the base station block-codes the control information to be transmitted through the part 1, that is, channelization code number information, MS, and NDI information, using a first block coding scheme that is set in advance. Proceed. Here, the first block coding scheme is a (32,9) block coding scheme as described with reference to FIGS. 19 and 20. If the control information to be transmitted is not information to be transmitted through Part 1 as a result of the check in step 1504, the base station proceeds to step 1507. In step 1507, the base station determines whether user data, that is, HSDPA data packet, to be transmitted through the HS-DSCH is initial transmission. If the user data is the initial transmission as a result of the check, the base station proceeds to step 1508. In step 1508, the base station selects TrCH ID & TBSS information among control information to be transmitted through part 3 according to the initial transmission, and a first Rate Matching (RM) pattern to be applied later. Proceed to step 1510. If the user data is not initial transmission, that is, retransmission, the base station proceeds to step 1509 in step 1507. In step 1509, the base station selects RV information among control information to be transmitted through Part 3 and a second Rate Matching (RM) pattern to be applied later, according to the retransmission. Proceed.

In step 1510, the base station multiplexes control information to be transmitted through the part 3, that is, HARQ process ID and selected TrCH ID & TBSS information or RV information corresponding to the HS-SHCCH slot format shown in FIG. 8A. Proceed to step 1511. In step 1511, the base station generates and adds a second CRC corresponding to the information to be transmitted through the part 3, that is, the HARQ process ID and the selected TrCH ID & TBSS information or RV information, and then proceeds to step 1512. In step 1512, the base station transmits TrCH ID & TBSS information when a predetermined convolutional coding scheme, that is, when the user data is initially transmitted as described with reference to FIGS. 19 and 20 (56, 25). After coding using the convolutional coding method, the process proceeds to step 1513. In step 1513, the base station performs rate matching in the second rate matching pattern in the case of the initial transmission, and in step 1514 after performing rate matching in the first rate matching pattern in the case of the retransmission.

In step 1514, the base station transmits the first block coded part 1 information, the second block coded part 2 information, and the convolutional coded part 3 information as shown in FIG. 8A. In step 1516, a bit stream is generated by multiplexing according to the slot format structure. In step 1516, the base station converts the one bit stream into two bit streams, that is, an I bit stream and a Q bit stream in parallel, and then proceeds to step 1518. In step 1518, the base station spreads the 1 bit stream and the Q bit stream with a predetermined spreading code, and then proceeds to step 1520. In step 1520, the base station adds the spread I bit stream and the Q bit stream to form one complex bit stream, and then proceeds to step 1522. In step 1522, the base station scrambles the summed complex bit stream by a predetermined scrambling code, and then proceeds to step 1524. In step 1524, the base station controls the channel gain by multiplying the scrambled signal by the set channel gain and proceeds to step 1526. In step 1526, the base station modulates the channel gain controlled signal using a preset modulation scheme, and then proceeds to step 1528. In step 1528, the base station processes the modulated signal in an RF band and proceeds to step 1530. In step 1530, the base station transmits the RF band signal to the air through an antenna and terminates.

Meanwhile, in FIG. 15, TrCH ID & TBSS information is transmitted when the user data to be transmitted from the base station to the UE is initial transmission, and RV information is transmitted when the user data is retransmission. As described above with reference to FIGS. 23 and 24, a structure for transmitting other useful information of bits remaining when the RV information is transmitted in a common field through which the TrCH ID & TBSS information or the RV information is transmitted is described. If so, the rate matching process described in step 1513 need not be performed separately. The reason is that the number of information bits transmitted through the public field is the same regardless of whether it is initial transmission or retransmission.

Next, referring to FIG. 16, a process of receiving HS-SHCCH control information according to a second embodiment of the present invention will be described.

16 is a flowchart illustrating a process of receiving fast-common control channel control information according to a second embodiment of the present invention, and in particular, corresponds to the structure of the HS-SHCCH receiver of FIG. 14 described above.

Referring to FIG. 16, first, in step 1604, the UE receives data from the air through an antenna and proceeds to step 1606. In step 1606, the UE converts the received signal into a baseband signal and proceeds to step 1608. In step 1608, the UE demodulates the signal converted into the baseband signal by a demodulation method corresponding to the modulation method applied by the transmitter, that is, the base station, and proceeds to step 1610. In step 1610, the UE descrambles the demodulated signal by the same scrambling code as the scrambling code applied by the base station, and then proceeds to step 1612. In step 1612, the UE separates the descrambled signal into an I bit stream and a Q bit stream, and then proceeds to step 1614. In step 1614, the UE multiplies the I bit stream and the Q bit stream by the same spreading code as that used by the base station and despreads the process, and then proceeds to step 1616.

In step 1616, the UE performs channel compensation on the despread I bit stream and Q bit stream, and then proceeds to step 1618. The reason for performing channel compensation on the despread I bit stream and the Q bit stream is to compensate for distortion, etc., because the HS-SHCCH control information is transmitted through the air phase. In step 1618, the UE serially converts the I bit stream and the Q bit stream into one complex bit stream and proceeds to step 1620. In step 1620, the UE demultiplexes the one complex-type bit stream corresponding to the HS-SHCCH slot format as shown in FIG. 8A to transmit control information, that is, channelization code number information. After classifying the MS, NDI information, the first CRC transmitted through Part 2 and the control information transmitted through Part 3, that is, the HARQ process ID, the TrCH ID & TBSS information or the RV information, and the second CRC, proceed to step 1622. do. In step 1622, the UE checks whether the demultiplexed information is control information transmitted through the part 3.

If the de-multiplexed information is the control information transmitted through the part 3, the UE proceeds to step 1624. In step 1624, the UE performs rate matching on the control information transmitted through part 3, and then proceeds to step 1626. In step 1626, the UE uses a convolutional coding scheme applied by the base station that is the transmitter for the rate-matched signal, that is, (56,25) in the case of initial transmission. 21) After decoding by the decoding method corresponding to the convolutional coding method, the process proceeds to step 1628. In step 1628, when the UE performs a second CRC error check on the decoded signal, if the error does not occur, the UE proceeds to step 1632. In step 1632, the UE receives the control information transmitted through the part 3 and ends.

In operation 1622, if the demultiplexed control information is not the control information transmitted through Part 3, the UE proceeds to step 1623. In step 1623, the UE checks whether the demultiplexed control information is control information transmitted through Part 1. If the de-multiplexed control information is the control information transmitted through the part 1, the UE proceeds to step 1630. In step 1630, the UE applies a first block decoding scheme that is previously set to control information transmitted through the part 1, that is, a first block coding scheme that applies the control information transmitted through the part 1 in the base station. After block decoding using the corresponding first block decoding method, the process proceeds to step 1632. Here, the first block coding scheme applied to the control information transmitted through Part 1 in the base station is a (32, 9) block coding scheme as shown in FIGS. 19 and 20.

On the other hand, if the de-multiplexed control information is not the control information transmitted through Part 1 as a result of the check in step 1623, the UE proceeds to step 1631. In this case, since the demultiplexed control information is not the control information transmitted through the part 1, it means the control information transmitted through the part 2, so the UE determines the control information transmitted through the part 2 in step 1631. After decoding in a second block decoding scheme that is set in advance, that is, a second block decoding scheme corresponding to the second block coding scheme applied to the control information transmitted through the part 2 in the base station, the process proceeds to step 1633. Here, the second block coding scheme applied to the control information transmitted through Part 2 in the base station is a (32, 12) block coding scheme as shown in FIGS. 19 and 20. In step 1633, if the UE does not generate an error after performing the first CRC error check on the second block decoded signal, the UE proceeds to step 16228. As a result, in step 1632, the UE finally receives the control information transmitted through the HS-SHCCH in the base station.                     

Meanwhile, in FIG. 16, the information received from the base station in the UE is TrCH ID & TBSS information when the user data is initially transmitted, and RV information when the user data is retransmission, which has been described with reference to FIGS. 19 and 20. In contrast, as shown in FIGS. 23 and 24, when the TrCH ID & TBSS information or the RV information is received through the common field, bits remaining when the RV information is received may have a structure in which other useful information is received. In this case, the rate matching process described in step 1624 does not need to be performed separately. The reason is that the number of information bits transmitted through the public field is the same regardless of whether it is initial transmission or retransmission.

The present invention as described above is required to transmit control information by differentiating control information transmitted through the HS-SHCCH according to whether the data packet to be transmitted to the UE in the communication system using the HSDPA method is the initial transmission or retransmission After minimizing radio resources, the control information that needs to be urgently needed for each control information and the control information that are not needed are divided into parts 1 and 2 or parts 1, 2, and 3 to be different from part to part. Since the coding method is used, it is possible to reliably obtain control information that must be urgently known in time. If the present invention is utilized in the HSDPA currently being discussed at the 3GPP standardization meeting, it is possible to greatly improve the performance of the overall system without increasing the system complexity.

Claims (9)

A high speed common control channel transmitting apparatus in a communication system using a high speed forward packet access method, Set in advance by inputting channelization code information allocated to a common channel through which a data packet for a specific user terminal is transmitted, information on the modulation scheme of the data packet, and new data indicator information indicating whether the data packet is initially transmitted or retransmitted. A first coding unit for block coding using a block coding scheme; A complex retransmission process ID indicating the number of logical channels through which the data packet is transmitted, an ID of the actual transport channel through which the data packet is transmitted if the data packet is an initial transmission, and during one transmission period of the transport channel A second coding for transmitting the transport block set size information by selectively inputting redundancy version information indicating a redundancy bit combination when the data packet is retransmitted and adding a CRC to a predetermined convolutional coding scheme; Wealth, And a wireless transmitter to multiplex and transmit the block coded information and convolutional coded information to correspond to the fast common control channel slot format. A high speed common control channel transmitting apparatus in a communication system using a high speed forward packet access method, A code allocator configured to generate channelization code information allocated to a common channel through which a data packet for a specific user terminal is transmitted; A modulation and coding scheme control unit for generating modulation scheme information of the data packet; A transport channel and block determination unit for generating an ID of an actual transport channel through which the data packet is transmitted, and transport block set size information transmitted during one transmission time period of the transport channel; A new data indicator indicating whether the data packet is initially transmitted or retransmitted, a complex retransmission process ID indicating a logical channel number to which the data packet is transmitted, and a first control signal if the data packet is initial transmission; A complex retransmission control unit configured to generate redundancy version information and a second control signal indicating a redundancy bit combination when the data packet is retransmitted; A switch for selecting the transport channel ID and the transport block set size information when the first control signal is generated and outputting the redundancy version information when the second control signal is generated; A first coding unit for block coding the channelization code information, the modulation scheme information, and the new data indicator information in a predetermined block coding scheme; A second coder configured to add a CRC to the complex retransmission process ID and the selective output information of the switch and to code a predetermined convolutional coding scheme; And a wireless transmitter to multiplex and transmit the block coded information and convolutional coded information to correspond to the fast common control channel slot format. A high speed common control channel transmitting apparatus in a communication system using a high speed forward packet access method, Set in advance by inputting channelization code information allocated to a common channel through which a data packet for a specific user terminal is transmitted, information on the modulation scheme of the data packet, and new data indicator information indicating whether the data packet is initially transmitted or retransmitted. A first coding unit for block coding using the first block coding scheme; A second coding unit for block coding the channelization code information, the modulation scheme information, and the new data indicator information with a second block coding scheme preset by adding a CRC; A complex retransmission process ID indicating the number of logical channels through which the data packet is transmitted, an ID of the actual transport channel through which the data packet is transmitted if the data packet is an initial transmission, and during one transmission period of the transport channel A third coding for transmitting the transport block set size information by selectively inputting redundancy version information indicating the redundancy bit combination when the data packet is retransmitted and adding a CRC to a predetermined convolutional coding scheme; Wealth, And a wireless transmitter configured to multiplex and transmit the first block coded information, the second block coded information, and the convolutional coded information to correspond to the fast common control channel slot format. . A high speed common control channel transmission method in a communication system using a high speed forward packet access method, Generating a common channel signal through which a data packet for a specific user terminal is transmitted and classifying the control information for receiving the user terminal into a predetermined number of parts according to the urgency; When the first part having the highest priority urgency among the predetermined number of parts is transmitted, the first part is block coded by a first block coding scheme that is set in advance, and a first CRC corresponding to the first part is generated. Block coding the first part by using a second block coding scheme which is preset; When a second part having a priority urgency next to the first part of the predetermined number of parts is transmitted, the second part is added by adding a second CRC corresponding to the second part. The process of convolutional coding the part, And multiplexing the first block coded and second block coded signals and a convolutional coded signal to correspond to the fast common control channel slot format. The method of claim 4, wherein The control information; Channelization code information allocated to the common channel, modulation scheme information of the data packet, new data indicator information indicating whether the data packet is initially transmitted or retransmitted, and a number of a logical channel to which the data packet is transmitted. A composite retransmission process ID indicating an ID, an ID of an actual transport channel through which the data packet is transmitted when the data packet is initially transmitted, transport block set size information transmitted during one transmission time period of the transport channel, and the data And the redundancy version information indicating the redundancy bit combination when the packet is retransmission. The method of claim 5, And the first part has the channelization code information, modulation scheme information, and new data indicator information. A high speed common control channel transmission method in a communication system using a high speed forward packet access method, Generating a common channel signal through which a data packet for a specific user terminal is transmitted and classifying the control information for receiving the user terminal into a predetermined number of parts according to the urgency; Block-coding the first part using a predetermined block coding scheme when the first part having the highest priority urgency among the predetermined number of parts is transmitted; When a second part having a priority urgency after the first part of the predetermined number of parts is transmitted, the second part is added by adding a CRC corresponding to the second part by a convolutional coding scheme. Convolutional coding, And multiplexing the block coded signal and the convolutional coded signal to correspond to the fast common control channel slot format. The method of claim 7, wherein The control information; Channelization code information allocated to the common channel, modulation scheme information of the data packet, new data indicator information indicating whether the data packet is initially transmitted or retransmitted, and a number of a logical channel to which the data packet is transmitted. A composite retransmission process ID indicating an ID, an ID of an actual transport channel through which the data packet is transmitted when the data packet is initially transmitted, transport block set size information transmitted during one transmission time period of the transport channel, and the data And the redundancy version information indicating the redundancy bit combination when the packet is retransmission. The method of claim 8, And the first part has the channelization code information, modulation scheme information, and new data indicator information.

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