KR20020000296A - Apparatus and method for using idle skirt in mobile communication system - Google Patents

Abstract

PURPOSE: An apparatus and a method for using an idle skirt in an HDR(High Data Rate) mobile system is provided to improve data transmission efficiency by using an idle skirt in transmitting data and control signals in the case of an idle slot at the downlink of an HDR system. CONSTITUTION: Data bits, transmitted through a CCCH(Common Control CHannel), are encoded at an encoder(101). The encoded data are inputted to an interleaver(102). The data processed and outputted from the interleaver(102) are spread into 32 Walsh codes at a Walsh cover processor(104) through a DEMUX(103). The DEMUX(103) receives 31 bits for encoding and converts the 31 bits into 31 parallel channels for spreading. The 31 parallel channels are spread by 31 among the 32 Walsh codes, except Walsh code #0 allocated to a pilot. The spread data respectively are added at a chip level adder(105) by the chip, and then repeated 4 times at a repeater(106) together with an MAC(Media Access Control) channel.

Description

Idle skirt mobile device and method and method of using idle skirt {APPARATUS AND METHOD FOR USING IDLE SKIRT IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to an apparatus and a method for transmitting data in a mobile communication system, and in particular, to move a high data rate (HDR) standard proposed in 3rd generation partnership project 2 (3GPP2) to supplement the data communication scheme of the IS-2000. An apparatus and method for transmitting data in a communication system.

In general, serving data in a mobile communication system has existed as an additional item of a voice service. Such a method can transmit a short message currently being serviced, and can perform a simple data service and an e-mail service in the Internet area. However, as the desire for data services by mobile communication users increases, work is being progressed to transmit data in a way that is improved in performance in the 3rd Generation Partnership Project 2 (3GPP2) of IS-2000. In order to support such high-speed data transmission, work for standardizing the HDR standard is being performed.

This will be described below. The forward (base station to terminal) channel of HDR consists of a frame having a length of 26.66 [ms]. Each frame consists of 16 slots. Therefore, each of the slots is 1.66 [ms] in length, and one slot is composed of 2048 chips. The configuration of the forward channel is time division multiplexing of the pilot channel, the forward MAC (hereinafter referred to as MAC) channel, the forward traffic channel, the forward control channel, and the like. A bundle of time division multiplexed signals is called a burst. User data packets are transmitted in the forward traffic channel, and control messages and user data packets are transmitted in the forward control channel.

1A is a diagram illustrating an active slot structure transmitted when there is traffic and control data in a forward channel. Active slots are time-division multiplexed as shown, such as pilot channel, MAC channel, traffic or control channel. The pilot channel is used for channel estimation at the receiver and the pilot channel data uses BPSK modulation. In the forward channel, a pilot channel consists of two pilot bursts per slot, and each pilot burst is located at the center of two half slots constituting one slot. In addition, the MAC channel is composed of three subchannels such as a reverse power control channel, a forward activity (FA) channel, and a reverse activity (RA) channel, and data of each channel is BPSK-modulated and code-transmitted by a 32 Walsh code. . Among them, the FA channel transmits a forward activity bit (FAB), and the FAB indicates whether traffic or a control channel is transmitted in a frame after one frame. That is, if the FAB is 1, the traffic or control channel is transmitted after one frame. If the FAB is 0, the traffic or control channel is not transmitted. Frames in which traffic and control channels are not transmitted are called idle frames, and 16 idle slots are transmitted. The MAC channel is spread over 32 chips in the FA channel, the RA channel, and the reverse power control channel, and is repeated four times, so a total of 128 chips are allocated to one slot. The 128 chips of the MAC channel are divided into two bursts of 64 chips. The two divided bursts are time-division multiplexed in front of and behind the separated second pilot burst. In the forward traffic channel, packets are configured differently according to the state of the channel. That is, it is possible to transmit at a variable data rate of 38.4 [kbps] to 2.4576 [Mbps] according to the reception signal-to-interference ratio of the receiver, and the number of slots constituting a packet varies according to the transmission rate. In addition, a modulation scheme such as QPSK / 8PSK / 16QAM is used according to each transmission rate, and coding rates of 1/4, 3/8, and 1/2 are used. The forward control channel transmits a fixed rate of 76.8 [kbps].

FIG. 1B illustrates a structure of an idle slot transmitted when there is no traffic and control data in a forward channel. An idle frame or idle slot is transmitted when there is no traffic and control signal to forward. In idle slots, only pilot and MAC channels are transmitted. In idle slots, an idle skirt signal with zero data is inserted into the front and rear of the first pilot burst and transmitted. These idle skirts are transmitted to increase the accuracy of the received signal-to-interference ratio estimation when there is a difference in the terminal arrival time of other multipath signal components of the pilot channel or pilot signals received from other base stations.

In detail, when one slot is divided into half, only the pilot channel is transmitted in the first half slot, and the data of the MAC channel is transmitted before and after the pilot channel in the second half slot. In the case of the first pilot channel, since the multipath signal components of the pilot burst and the arrival times of the pilot bursts received from other base stations are different from each other, the position of each pilot burst is shifted on the time axis, so some signals are measured to have less interference than the actual ones. . On the other hand, the second pilot channel accurately estimates the signal-to-interference ratio by the MAC channel even if the multipath components and the pilot signals of other base stations are shifted in the time axis. Therefore, in order to increase the accuracy of the signal-to-interference ratio estimation of the first pilot channel, an idle skirt signal is generated and inserted before and after the pilot channel. The idle skirt signal is transmitted in front of and behind the first pilot burst of the idle slot in two bursts of 64 chips each, such as the MAC channel. As such, the idle skirt signal is used to increase the accuracy of the received signal-to-interference ratio, but no data is transmitted through the idle skirt signal. On the other hand, it occupies forward resources and is transmitted at a predetermined power, which causes interference in other sectors.

Accordingly, an object of the present invention for solving the above problems is to provide an apparatus and method for improving data transmission efficiency by using an idle skirt for the transmission of data and control signals when idle slots are transmitted in the forward link of the HDR system. Is in.

Another object of the present invention for solving the above problems is to provide an apparatus and method for reducing the error probability of the control signal transmitted to the MAC channel by repeatedly transmitting the forward MAC (Media Access Control) channel of the HDR system. have.

The apparatus according to the present invention for achieving the above objects is divided into a transmitter and a receiver. The transmission device is a data transmission device of a forward idle channel in a mobile communication system using HDR, and a traffic processor for processing and transmitting traffic data into a forward traffic channel when data to be transmitted to the user is present, and a free signal indicating the start of one frame. A preamble processing unit for generating and repeatedly transmitting an amble signal, a first multiplexer for time division multiplexing and outputting data of the trapping processing unit and the preamble processing unit, and transmitting broadcast data to be transmitted when there is no data to be transmitted to the user side A broadcast signal transmitter for processing data to be processed; a second multiplexer for time division multiplexing and outputting the output of the broadcast signal transmitter and the output of the first multiplexer; and a pilot for generating and outputting data of pilot channels and MAC channels; And a Mac channel data generator, and the second Characterized by configured to output the pilot and MAC channel data for transmission to the demultiplexer for transmitting a third multiplexer and an output of the third multiplexer to output the time-division-multiplexed at a predetermined position within a slot.

The broadcast signal transmitter may include an encoder for encoding the broadcast signal, an interleaver for interleaving and outputting the output of the encoder, a demultiplexer for demultiplexing the output of the interleaver, and a predetermined Walsh code for the demultiplexer output. A Walsh cover for Walsh covering, a chip level adder for adding the output of the Walsh cover to a chip level, and a repeater for repeating the output of the chip level adder according to the transfer rate and the amount of data. .

The receiver is a device for receiving broadcast data transmitted through a forward idle channel in a mobile communication system using HDR, a complex despreader for despreading and outputting data received as a radio signal, and the despreader A channel compensator for channel compensating the output of the first comparator, a first demultiplexer for demultiplexing and outputting the MAC channel data and traffic, a control channel and the broadcast data channel, and the first inverse A symbol combiner for symbol combining the MAC channel data of the neutralizer, a forward active bit buffer for storing Walsh-decoded forward active bits (FAB) among the outputs of the symbol combiner, and data of the traffic channel among the first demultiplexed outputs And a second inverse for receiving and broadcasting data and demultiplexing and outputting the data according to the output of the forward active bit buffer. Consists of a broadcast data processor for processing and fire, and wherein the traffic processor for processing traffic data of the output of the second demultiplexer, the broadcast data of the output of the second demultiplexer.

The broadcast data processing unit includes a symbol combiner for symbol combining the output of the second demultiplexer, a recover for decovering the output of the symbol combiner according to a transmission scheme, a multiplexer for multiplexing the output of the recover; And a deinterleaver for deinterleaving the output of the multiplexer, and a decoder for decoding the output of the deinterleaver.

A method according to the present invention for achieving the above objects is a method for transmitting / receiving data on a forward idle channel in a mobile communication system using HDR, when there is no data to be transmitted on the forward channel broadcast data to the idle skirt Inserting and transmitting the data, and checking a forward active bit (FAB) to check whether an idle frame exists, and in the case of an idle frame, extracting broadcast data from each idle slot of the idle frame and demodulating the extracted broadcast data into data. The conversion is done.

The broadcast data may include weather information or stock information. The broadcast data may be configured to repeatedly transmit the Mac channel data. When the entire frame is an idle frame, the broadcast data may be divided into one frame and transmitted.

In addition, the broadcast data may be configured to include an error correction bit for transmission, and may be configured to perform error correction using the error correction bit upon reception, and simultaneously encode and transmit the broadcast data. The data can be decrypted and used.

FIG. 1A illustrates the structure of an active slot transmitted when there is traffic and control data in a forward channel; FIG.

FIG. 1B illustrates a structure of idle slots transmitted when there is no traffic and control data in a forward channel; FIG.

2 illustrates a structure of a forward channel idle slot for transmitting a CCCH according to a first embodiment of the present invention;

3 is a block diagram illustrating a transmitter structure of an HDR base station for transmitting a CCCH according to a first embodiment of the present invention;

4 is a control flowchart when a HDR terminal receives a CCCH in an idle frame according to the first embodiment of the present invention;

5 is a block diagram showing a receiver structure of an HDR terminal receiving a CCCH according to a first embodiment of the present invention;

6 is a diagram illustrating a structure of an HDR forward channel idle slot for repeatedly transmitting a MAC channel according to the second embodiment of the present invention;

7 is a block diagram illustrating a transmitter structure of an HDR base station for repeatedly transmitting a MAC channel according to a second embodiment of the present invention;

8 is a block diagram illustrating a structure of a MAC channel receiver of an HDR terminal according to a second embodiment of the present invention.

In the present invention will be described through two embodiments.

A first embodiment of the present invention is as follows. The forward link of the HDR system continuously informs whether a frame transmitted one frame through the FA channel is an active frame or an idle frame. Therefore, when the idle frame is transmitted, all receivers can know the positions of the idle frame and the idle slot, and thus can transmit a broadcasting data signal or a control signal to all receivers through the idle skirt of the idle slot. To this end, the present invention allocates a common control channel (hereinafter referred to as CCCH) instead of an idle skirt. The first embodiment described above is described in detail with reference to FIGS.

A second embodiment of the present invention is as follows. Even if the FA channel is not used in the forward link of the HDR system, the energy of the idle skirt can be detected to confirm the existence of the idle slot and the idle skirt. This method is particularly useful because such information is not transmitted to the FA channel when one frame as a whole is not an idle frame but a slot or some slots in one frame are idle slots. Repeated transmissions of the MAC channel transmitted at the front and back of the second pilot burst in the idle slot also at the skirt position of the first pilot burst indicate the probability of error in the reverse power control bits, FABs, and Reverse Activity Bits (RABs) transmitted to the MAC channel. Can be lowered. The second embodiment is described in detail with reference to FIGS. 6 to 8 to be described later.

2 is a diagram illustrating a structure of a forward idle slot in which a CCCH is transmitted according to a first embodiment of the present invention. The CCCH can be received by all terminals in a sector and can be used as a broadcast channel for transmitting simple message data such as weather information and stock information or for transmitting configuration and control information of sectors such as adjacent sector numbers. When the terminal determines that the FAB of the FA channel becomes 0 and the next frame is an idle frame, the terminal reads the CCCH of the idle slot and receives a broadcast channel. When the CCCH is configured in the same structure as the MAC channel, 64 chips are transmitted in two skirt bursts. Therefore, when CCCH data is spread over two skirt bursts with 32 Walsh codes and repeatedly transmitted four times, 31 bits of data per slot can be coded and multiplexed by subtracting the Walsh code allocated to the pilot. Therefore, when an entire frame is an idle slot, the total number of bits that can be transmitted through the idle skirt existing in one frame is 31 (bits) x 16 (slots) = 496 bits. In addition, error correction encoding may be applied to the data to be transmitted. This example is described by applying a numerical value as follows. If the code rate of the data transmitted through the idle skirt is 1/2 and the code length is 6, the number of actual data bits that can be transmitted becomes 245 bits.

3 is a block diagram illustrating a transmitter of a base station when transmitting CCCH data through an idle skirt according to a first embodiment of the present invention. Data bits transmitted on the CCCH are encoded by the encoder 101, and the encoded data is input to the interleaver 102 and processed. The data output from the interleaver 102 passes through the demultiplexer 103 (hereinafter referred to as DEMUX) and is spread by the Walsh cover processor 104 into a 32 Walsh code. The DEMUX 103 receives 31 bits for encoding and converts them into 31 parallel channels for spreading. The 31 parallel channels are spread by the 31 31 Walsh codes other than the Walsh 0 code assigned to the pilot. The spread data is added in chip units in chip level adder 105 and repeated four times as in the MAC channel in repeater 106.

On the other hand, the data of the traffic channel is interleaved after the encoding and modulation process in the traffic processing unit 110, punctured and repeated, and demultiplexed to add the 16 Walsh covered data on a chip level basis. The added data is input to the first time division multiplexer 120. In addition, the preamble for notifying the start of one frame is repeated at the transmission rate of the traffic channel through an iterator and is spread by a 32 Walsh code, such as the Walsh code of the reverse power channel, and is input to the first time division multiplexer 120. The first time division multiplexer 120 time-divisions an input signal and inputs the second time division multiplexer 130. The output of repeater 106 in the CCCH data is also input to second time division multiplexer 130. In this case, the second time division multiplexer 130 passes preamble, traffic, and control channel data in an active frame, and passes CCCH in an idle frame. As such, the data output from the second time division multiplexer 130 is input to the third time division multiplexer 140. In addition, the third time division multiplexer 140 inputs an output of an iterator for processing MAC channel data and data of a pilot channel. Therefore, the three channels are time-divided and output. The CCCH passing through the second time division multiplexer 130 in an idle slot is time-divided by 64 chips in front of and behind the first pilot burst of the idle slot in the third time division multiplexer 140. The time-divided signal of the pilot channel, the FA channel RA channel, the reverse power control channel, etc. is transmitted through the complex spreader 150 and the baseband filter 160. The configuration and processing of the CCCH is not limited to the embodiments described in the present invention, and various modifications may be made in encoding and interleaving, multiplexing, demultiplexing, and the like.

4 is a control flowchart when a HDR terminal receives a CCCH in an idle frame according to the first embodiment of the present invention. In step 200, the terminal checks whether the FAB is 1 in the previous frame. If the FAB is 1 as the result of the check, the process proceeds to step 202 to search for the preamble, and then finds the packet transmitted to itself. If the preamble is detected in step 204 and proceeds to step 206 to receive a traffic channel in the current slot, if the preamble is not detected, go back to step 202 to continue searching for the preamble. If the traffic channel of the reception slot is received in step 206, the data of the next slot is continuously received in step 208. After that, the flow proceeds to step 210 and when the packet ends, it is checked whether the frame is terminated. If the packet is not terminated as a result of the check, step 206 is reached. If the packet is terminated, step 212 is performed. Therefore, through the above process, the slot is received and the traffic channel is read until the packet is terminated. In step 204, if the check result frame of step 212 is finished, the process proceeds to step 200 to read the FAB of the previous frame again, otherwise proceeds to step 202 to search for the preamble again.

On the contrary, if the FAB is not 1, that is, if the FAB is 0, the process proceeds to step 214. In step 214 to step 218, the CCCH is read from each slot for one frame. That is, in step 214, CCCH data is received in one frame. In step 216, after receiving the next slot data, the control proceeds to step 218 to check whether one frame is terminated. As a result of the inspection, if one frame is ended, step 200 is performed. When the check result frame of step 218 ends, the process proceeds to step 200 where the FAB of the previous frame is read again.

5 is a block diagram illustrating a receiver structure of an HDR terminal for receiving a CCCH according to the first embodiment of the present invention. The received signal passing through the complex spreader 300 and the channel compensator 301 passes through the first demultiplexer 302 to distinguish the MAC channel, traffic and control channel, and CCCH. Data output from the first demultiplexer 302 to the second demultiplexer 303 becomes a traffic and control channel, CCCH.

On the other hand, the data of the MAC channel is divided into FAB, RAB, and reverse power control bits are output from the symbol combiner 320. Walsh despread data from the FAB is input to the FAB buffer 330. The data output from the FAB buffer 330 is used as a signal for demultiplexing the second demultiplexer 303. Therefore, the output of the FAB buffer 330 checks the idle frame with the FA bit received in the frame one frame before. Therefore, the FA bit is used to pass the CCCH in the idle frame and to pass the traffic and control channel in the active frame. The CCCHs are combined symbolically in symbol combiner 304 and decovered by 32 Walsh in Walsh decover processor 305 and separated into 31 channels. The separated data is multiplexed again with each channel by the multiplexer 306. The multiplexed CCCH is decoded by the deinterleaver 307 and the decoder 308.

A second embodiment of the present invention is as follows.

6 is a diagram illustrating a structure of an idle slot of an HDR forward channel repeatedly transmitting a MAC channel according to a second embodiment of the present invention. The terminal detects and compares the energy of the idle skirt with the energy of the forward traffic and the control channel to determine whether it is an active slot or an idle slot. In the idle slot, the MAC channel is repeatedly transmitted before and after the first pilot burst so that the terminal detects the FAB, RAB, and reverse power control bits by combining the MAC channel of the first half slot and the MAC channel of the second half slot.

7 is a block diagram illustrating a structure of a transmitter of a base station for transmitting HDR data according to a second embodiment of the present invention. The FAB, RAB, and reverse power control bits are multiplied by the Walsh code except for Walsh 1, 2, and 0, 1, and 2, respectively, of length 32, and are added in units of chips and transmitted to the MAC channel. The MAC channel is repeated four times in the case of an active slot by the MAC channel controller 170 and transmitted 64 chips at the front and back of the second pilot burst, and eight times in the case of an idle slot, the first and second pilots. There are 64 chips in front of and one in front of the burst. The same reference numerals are given to the same components as in FIG. 2, and detailed descriptions of the same parts will be omitted. In addition, the TDM controller 180 controls the data of the MAC channel to be multiplexed back and forth between two pilot bursts in the case of an idle skirt.

8 is a block diagram illustrating a structure of a MAC channel receiver of an HDR terminal according to a second embodiment of the present invention. In the following description, the MAC channel located in the first half slot of the idle slot is referred to as a first MAC channel, and the MAC channel located in the second half slot is referred to as a second MAC channel.

The terminal outputs the output of the first MAC channel energy detector 400 and the traffic / control channel energy detector 402 to know whether the currently transmitted slot is an idle slot, that is, whether the MAC channel is transmitted in the first half slot. Compare. The first MAC channel energy detector 400 accumulates a total of 128 chips four times in 32 chip units, each of 64 chips at the front and the rear of the first pilot, and detects the accumulated energy of the symbol. The traffic / control channel energy detector 402 detects energy in 16 chip units and accumulates eight times 128 chips outside the first MAC channel section in the traffic / control channel. The first MAC channel energy detector 400 and the traffic / control channel energy detector 402 send the detected energy value to a comparator 404. The comparator 404 compares the first MAC channel energy with the traffic / control channel energy and outputs a signal indicating that the slot is idle when the energy of the first MAC channel section is greater than the energy of the traffic / control channel section. If the energy of the channel section is greater than the energy of the MAC channel section, a signal indicating that the slot is active is output.

The signal output from the comparator 404 is input to the selector 406. The selector outputs a signal of the first MAC channel received from the front and back of the first pilot channel when the output signal of the comparator indicates an idle slot, and selects an active slot. If so, no signal is output. The output of the selector 406 is input to the adder 408 and added to the second MAC channel received signal in chip units. The 128-chip MAC channel signals added in chip units are accumulated four times in 32-chip units in the symbol combiner 410 to form 32-chip MAC signals. The combined 32-channel MAC channel signals respectively recover FA bits by the 32 Walsh 1 code in the first despreader 412 and RA bits by the 32 Walsh 2 code in the second despreader 414. The third despreader 416 restores the power control bit by a code assigned to each terminal among the remaining 32 Walsh codes.

As described above, the present invention improves the efficiency and capacity of the forward system by using an idle skirt for transmitting broadcast data and control signals when transmitting idle slots in the HDR forward channel. In addition, by repeatedly transmitting the MAC channel, the error probability of the control signal transmitted on the MAC channel is reduced. The present invention increases the system efficiency by increasing the utilization of the idle skirt in a mobile communication system of the HDR standard.

Claims (30)

In the data transmission method of the forward idle channel in a mobile communication system using HDR, And transmitting data by inserting broadcast data into an idle skirt of the forward idle channel when there is no data to transmit on the forward channel. The method of claim 1, The broadcast data is a data transmission method of a forward idle channel in a mobile communication system using HDR, characterized in that the weather information. The method of claim 1, The data transmission method of the forward idle channel in the mobile communication system using HDR, characterized in that the broadcast data is the stock information. The method of claim 1, The data transmission method of the forward idle channel in the mobile communication system using HDR, characterized in that the broadcast data repeats the data of the MAC (MAC) channel. The method of claim 1, The data transmission method of the forward idle channel in the mobile communication system using HDR, characterized in that the broadcast data is divided and transmitted to the idle skirt existing in the one frame when the entire frame is an idle slot. The method of claim 5, The data transmission method of the forward idle channel in the mobile communication system using HDR, characterized in that for each idle slot of the broadcast data is encoded and then spread and transmitted. The method according to claim 5 or 6, The data transmission method of the forward idle channel in the mobile communication system using HDR, characterized in that for transmitting the error correction data in the data of each idle slot. In the data transmission apparatus of the forward idle channel in a mobile communication system using HDR, A traffic processor for processing and transmitting traffic data to a forward traffic channel when data to be transmitted to a user is present; A preamble processing unit for generating and repeatedly transmitting a preamble signal indicating the start of one frame; A first multiplexer for time division multiplexing and outputting data of the trapping processing unit and the preamble processing unit; A broadcast signal transmitter which processes the broadcast data to be transmitted into data to be transmitted when there is no data to be transmitted to the user; A second multiplexer for time division multiplexing and outputting the output of the broadcast signal transmitter and the output of the first multiplexer; A pilot and mac channel data generator for generating and outputting pilot channel and mac channel data; A third multiplexer for time-division multiplexing the output of the second multiplexer and the pilot and MAC channel data at a predetermined position in one slot; And a transmission unit for transmitting the output of the third multiplexer, wherein the data transmission apparatus of the forward idle channel in the mobile communication system using HDR. The method of claim 8, And a data signal of a forward idle channel in a mobile communication system using HDR, wherein the broadcast signal is weather information. The method of claim 8, And a data transmission apparatus of a forward idle channel in a mobile communication system using HDR, wherein the broadcast signal is security information. The broadcast signal transmission unit according to any one of claims 8 to 10, An encoder for encoding the broadcast signal; An interleaver for interleaving and outputting the output of the encoder; A demultiplexer for demultiplexing the output of the interleaver, A Walsh cover for Walsh covering the demultiplexer output with a predetermined Walsh code; A chip level adder for adding the output of the Walsh cover to a chip level; And a repeater for repeating the output of the chip level adder according to the transmission speed and the amount of data. A method for receiving broadcast data transmitted through a forward idle channel in a terminal of a mobile communication system using HDR, Checking whether a frame is idle by checking a forward active bit (FAB) from a mobile communication system; Extracting broadcast data from each idle slot of the idle frame in the case of the idle frame; And demodulating the extracted broadcast data and converting the extracted broadcast data into data. The method of claim 1, wherein the terminal of the mobile communication system using HDR is transmitted through a forward idle channel. The method of claim 12, And receiving broadcast data transmitted through a forward idle channel in a terminal of a mobile communication system using HDR, wherein the broadcast data is weather information. The method of claim 12, And receiving broadcast data transmitted through a forward idle channel in a terminal of a mobile communication system using HDR, wherein the broadcast data is security information. The method of claim 12, wherein the broadcast data is detected in units of one frame, and the terminal of the mobile communication system using the HDR is transmitted through a forward idle channel. An apparatus for receiving broadcast data transmitted through a forward idle channel in a terminal of a mobile communication system using HDR, A complex despreader for despreading and outputting data received by a wireless signal; A channel compensator for channel compensating the output of the despreader; A first demultiplexer for demultiplexing the MAC channel data, the traffic, the control channel, and the broadcast data channel and outputting the output of the channel compensator; A symbol combiner for symbol combining the MAC channel data of the first demultiplexer; A forward active bit buffer for storing Walsh-decoded forward active bits (FABs) of the output of the symbol combiner; A second demultiplexer configured to receive data of the traffic channel and broadcast data among the first demultiplexed outputs and to demultiplex and output the data according to the output of the forward active bit buffer; A traffic processor for processing the traffic data during the output of the second demultiplexer; And a broadcast data processor configured to process broadcast data among the outputs of the second demultiplexer. The broadcast data transmitted through the forward idle channel in the HDR mobile communication system. The method of claim 16, And receiving the broadcast data transmitted through a forward idle channel in the HDR mobile communication system, wherein the broadcast data is weather information. The method of claim 16, And apparatus for receiving broadcast data transmitted through a forward idle channel in the HDR mobile communication system, wherein the broadcast data is security information. The broadcast data processing unit according to any one of claims 16 to 18, A symbol combiner for symbol combining the output of the second demultiplexer; A decover for decovering the output of the symbol combiner according to a transmission scheme; A multiplexer for multiplexing the output of Discover; A deinterleaver for deinterleaving the output of the multiplexer; And a decoder for decoding the output of the deinterleaver, wherein the apparatus receives the broadcast data transmitted through a forward idle channel in the HDR mobile communication system. The method of claim 19, And receiving and processing broadcast data transmitted through a forward idle channel in the HDR mobile communication system, wherein the broadcast data extracts and processes only broadcast data of one frame. In the device for repeatedly transmitting the MAC (MAC) channel data to the forward idle channel in a mobile communication system using HDR, A traffic processor for processing and transmitting traffic data to a forward traffic channel when data to be transmitted to a user is present; A preamble processing unit for generating and repeatedly transmitting a preamble signal indicating the start of one frame; A first multiplexer for time division multiplexing and outputting data of the trapping processing unit and the preamble processing unit; A pilot and mac channel data generator for generating and outputting pilot channel and mac channel data; A MAC channel repeater controller for checking the idle channel to control the repetition of Mac channel data in the idle channel; A repeater for receiving and repeatedly outputting the MAC channel data, and repeating the MAC channel data again under the control of the MAC channel repeat controller; A pilot channel generator for generating and outputting a pilot signal; A time division multiplexer for time division multiplexing the output of the repeater, the output of the first multiplexer, and the output of the pilot channel generator; And a transmitter for converting an output of the time division multiplexer into a signal for transmission. 2. The data transmission apparatus using a forward idle channel in a mobile communication system using HDR. An apparatus for receiving forward MAC channel data performed by an HDR mobile communication system terminal for repeatedly transmitting first and second MAC channel data to a forward idle channel, A first energy detector for detecting energy of the first MAC channel data of the forward channel; A second energy detector for detecting energy of the traffic and control channels; A comparator for outputting whether a difference between an output value of the first energy detector and the second energy detector is greater than or equal to a predetermined value; And a selector for outputting the first MAC channel data by the output of the comparator or not to output the MAC data. . The method of claim 22, An adder for adding the output of the selector and the second MAC channel data; And a detector for detecting an abnormality in the output of the adder. The apparatus for receiving forward MAC channel data in an HDR mobile communication system for transmitting data to a forward idle channel. A method for transmitting / receiving data on a forward idle channel in a mobile communication system using HDR, Inserting and transmitting broadcast data into an idle skirt when there is no data to transmit on the forward channel; Checking whether an idle frame is detected by checking a forward active bit (FAB), and extracting broadcast data from each idle slot of the idle frame and demodulating the extracted broadcast data into data when the frame is idle. A method for transmitting / receiving data on a forward idle channel in a mobile communication system using HDR. The method of claim 24, And transmitting / receiving data through a forward idle channel in a mobile communication system using HDR, wherein the broadcast data is weather information. The method of claim 24, And transmitting / receiving data through a forward idle channel in a mobile communication system using HDR, wherein the broadcast data is securities information. The method of claim 24, And transmitting / receiving data through a forward idle channel in a mobile communication system using HDR, wherein the broadcast data repeatedly transmits MAC channel data. The method according to any one of claims 24 to 27, A method for transmitting / receiving data on a forward idle channel in a mobile communication system using HDR, wherein when a whole frame is an idle frame, the broadcast signal is divided and transmitted within one frame. The method of claim 28, To transmit / receive data on a forward idle channel in a mobile communication system using HDR, wherein the broadcast data includes an error correction bit and transmits the error data. Way. The method of claim 29, And transmitting and receiving data on a forward idle channel in a mobile communication system using HDR, wherein the broadcast data is encoded and transmitted, and the encoded data is decoded at the time of reception.