KR20020031537A - Device and method for providing multimedea service in channel of wireless communication system - Google Patents

Abstract

The present invention relates to a reverse link of a communication system capable of supporting a multimedia service including voice and data services in a mobile communication system, and specifically includes a structure of a reverse link physical channel and a transmitter structure.

Description

Device and method for reverse channel transmission in mobile communication system supporting multimedia service {DEVICE AND METHOD FOR PROVIDING MULTIMEDEA SERVICE IN CHANNEL OF WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a reverse channel communication apparatus and method of a mobile communication system, and more particularly, to a reverse channel communication apparatus and method of a mobile communication system capable of supporting a multimedia service.

In general, since the reverse link physical channel structure of the existing IS-95 series North American synchronous system using 1x bandwidth is based on voice communication service, it is difficult to simultaneously support voice service and high-speed data service in the same frequency band. It is difficult to smoothly support multiple services with different QoS requirements.

Therefore, in a communication system capable of supporting a multimedia service using 1x bandwidth, it is necessary to implement a physical channel structure and a transmitter of a reverse link that can support an efficient multimedia service of a reverse link and can support an efficient multimedia service of a forward link.

Accordingly, an object of the present invention is to provide a reverse channel transmission apparatus and method capable of supporting a multimedia service in a mobile communication system.

Another object of the present invention is to provide an apparatus and method for transmitting a reverse medium access control channel through which a terminal can transmit information to a base station in order to support a multimedia service in a mobile communication system.

Another object of the present invention is to provide a reverse AISHC channel transmitter and method for transmitting ACK or NAK information on received forward link packet data in order to support multimedia services in a mobile communication system.

Another object of the present invention is to provide a base station to determine the transmission rate that a specific terminal can receive next in consideration of the time-varying channel situation for the forward additional channel and the number of orthogonal codes available in the forward direction to support multimedia services in the mobile communication system. The present invention provides an apparatus and method for transmitting a reverse DRQSCH channel.

Another object of the present invention is to provide a reverse SSI channel transmitter and method for transmitting maximum transmittable sector information in terms of forward packet traffic transmission in order to support multimedia services in a mobile communication system.

Another object of the present invention is to provide a reverse QMISCH channel transmitter and method for transmitting QoS matching information for a current data channel frame to support a multimedia service in a mobile communication system.

It is still another object of the present invention to provide an apparatus and method for transmitting a reverse channel channel that can indicate a data rate for data that a terminal can transmit in the reverse direction to support a multimedia service in a mobile communication system.

Another object of the present invention is QoS control for more efficient multimedia service support for a communication system using 1x bandwidth of 1.25 MHz in a cdma2000 series North American synchronization system to support multimedia service in a mobile communication system. And a reverse channel transmitter and method for enabling efficient retransmission and increasing a transmission speed of a reverse link.

1A illustrates structures for an Acknowledgment Indicator Subchannel (AISCH) and a Data Rate Request Subchannel (DRQSCH) channel.

1B is a diagram illustrating a structure for a selected sector indicator (SSI) channel.

2 is a diagram illustrating a transmitter structure of an AISCH and a DRQSCH channel.

3 is a diagram illustrating a transmitter structure of a selected sector indicator channel (SSICH).

4 is a diagram illustrating a transmitter structure of a quality matching indicator subchannel (QMISCH) and a data rate indicator subchannel (DRISCH).

5A illustrates an embodiment of multiplexing that precedes 3-bit Data Rate Indicator (DRI) information and follows 5-bit Quality Matching Indicator (QMI) information.

5B illustrates an embodiment of multiplexing that precedes 5-bit QMI information and follows 3-bit DRI information.

6 shows an embodiment using (24,8) block coding for an embodiment of multiplexing that precedes 5-bit QMI information and follows 3-bit DRI information.

FIG. 7 illustrates an embodiment using (48,8) block coding for an embodiment of multiplexing that precedes 5-bit QMI information and follows 3-bit DRI information.

8 shows an embodiment using (192,8) block coding for an embodiment of multiplexing that precedes 5-bit QMI information and follows 3-bit DRI information.

FIG. 9 illustrates Walsh spreading, quadrature spreading, and RF band frequency transition processes for each channel of a reverse link. FIG.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

According to an embodiment of the present invention, a response channel (Acknowledgement Indicator Subchannel: hereinafter referred to as AISCH), in which channels classified as a medium access control (MAC) channel, is newly added, to support a multimedia service. Data Rate Request Subchannel (hereinafter referred to as DRQSCH), Sector Display Channel (hereinafter referred to as SSICH), Quality Matching Indicator Subchannel (hereinafter referred to as QMISCH), Reverse Rate Display Channel (Data Rate Indicator Subchannel: DIRSCH hereinafter).

First, the functions of newly added channels to support a multimedia service according to an embodiment of the present invention will be described.

First, the AISCH is a channel for notifying that a received physical layer packet has been successfully received or requesting retransmission for a hybrid-automatic repeat request (H-ARQ) for a forward link physical layer packet. The information of the AISCH may be multiplexed with data rate request subchannel (DRQSCH) information and transmitted through I-ch.

Secondly, the DRQSHC is a channel requesting the most ideal transmission rate in the forward link based on the information on the orthogonal code of the base station (hereinafter assumed to use Walsh code) and the CIR measurement. The information of the DRQSCH may be multiplexed with the information of the Acknowledgment Indicator Subchannel (AISCH) and transmitted through I-ch.

Third, the SSICH is a channel for designating a base station to transmit a physical layer packet in association with information transmitted through the DRQSCH (Data Rate Request Channel).

Fourth, the QMISCH uses a QoS matching scheme to guarantee different QoS for each data service and is a channel for transmitting information related to QoS matching. The information of the QMISCH is information of a data rate indicator subchannel (DRISCH). It can be multiplexed with and transmitted over the I-ch.

Fifth, the DRISCH represents a transmission rate of a physical layer packet transmitted through a reverse physical channel, and the information of the DRISCH is multiplexed with the information of the Quality Matching Indicator Subchanel (QMISCH) to be transmitted through the I-ch. Can be.

In the following description, it is assumed that the information of the AISCH and the information of the DRQSCH are multiplexed and transmitted through one physical channel, and the information of the QMISCH and the information of the DRISCH are multiplexed and transmitted through one physical channel. However, the information of the AISCH and the DRQSCH may be transmitted independently, and the information of the QMISCH and the DRISCH information may be independently transmitted.

In addition, according to an embodiment of the present invention, a terminal of a mobile communication system supporting a multimedia service should include message generators capable of generating messages of the above media access control channels. In the embodiment of the present invention, the configurations of the message generators are not shown.

Table 1 summarizes the reverse MAC channels necessary for data service on the reverse link and packet data service on the forward link of the mobile communication system according to the embodiment of the present invention. Table 1 below shows reverse MAC channels for the reverse link data service and the forward link data service.

channel Usage Quality Matching Indicator Subchannel QoS matching scheme is used to guarantee different QoS for each data service. It is a channel for transmitting information related to QoS matching. It is multiplexed with Data Rate Indicator Subchannel and transmitted through I-ch. Data RateIndicatorSubchannel It indicates the transmission rate of a physical layer packet transmitted through a reverse physical channel, and is multiplexed with a quality matching indicator subchanel and transmitted through an I-ch. Acknowledgment Indicator Subchannel For a hybrid-automatic repeat request (H-ARQ) for the forward link physical layer packet, a channel for notifying that the received physical layer packet has been successfully received or requesting retransmission. Data Rate Request Multiplexed with Subchannel and transmitted through I-ch. Data Rate Request Subchannel Based on the information on the base station Walsh space and the CIR measurement, the channel requests the most ideal data rate on the forward link. Acknowledgment Indicator Multiplexed with the subchannel, it is transmitted through the I-ch. Selected Sector Indicator Channel A channel for designating a base station to transmit a physical layer packet in association with information transmitted through a data rate request channel.

Transmission of reverse MAC channels as shown in Table 1 is performed in 20msec frame units and 1.25msec units. Acknowledgment Indicator Subchannel (AISCH), Data Rate Request Subchannel (DRQSCH), and Selected Sector Indicator Channel (SSICH) are transmitted in units of 1.25 msec. This is because it is a MAC channel for controlling the channel. The Quality Matching Indicator Subchannel (QMISCH) and the Data Rate Indicator Subchannel (DRISCH) are transmitted in a frame unit of 20 msec, which is a MAC channel for a reverse physical layer packet having a duration of 20 msec for the QMISCH and the DRISCH. Because it is.

1A is a diagram illustrating a structure of AISCH and DRQSHC in a mobile communication system proposed in an embodiment of the present invention.

Referring to FIG. 1A, the front 768 chip section of the 1.25 msec time section consisting of 1,536 chips is used as a section for transmitting AISCH information, and the back 768 chip is used as a section for transmitting DRQSCH information. Although FIG. 1A illustrates a structure in which AISCH information is transmitted in a first 768 chip section within a 1.25ms section, and DRQSCH information is transmitted in a 768 chip section in the second half section, first, a section of 1,25 ms is shown. It is also possible to transmit information of the DRQSCH and to use the information of the AISCH in the later section. In addition, the embodiment of the present invention has been described assuming that the AISCH and the DRQSCH are multiplexed and transmitted in a 1.25ms interval, but a method of transmitting independently without multiplexing may also be used.

On the other hand, the information of the AISCH transmitted in a half cycle of 1.25ms interval may be composed of 4 bits. It has a structure that can support up to four Multiple Physical Sub-Channels in order to support QoS more efficiently for packet data transmission of the forward link and to maximize the efficiency in retransmission. That is, information of reverse AISCH is transmitted by 4 bits, and one bit corresponds to one forward packet data physical sub-channel to transmit ACK (Acknowledge) or NAK (Non-acknowledge) information for each. By doing so, it means that the forward link system corresponding to the reverse link system proposed by the present invention may have a maximum of four multiple physical sub-channel structures. In addition, DRQSCH information is transmitted in 4 bits in the second half of 1.25ms, which supports up to 16 data rates in the forward link system. Herein, a description will be given on the assumption that the information of the AISCH and the DRQSCH is composed of 4 bits. However, when the information of the AISCH and the DRQSCH is extended or reduced, the information may be transmitted more than 4 bits or less.

FIG. 1B is a diagram showing the structure of SSICH in the system proposed by the present invention. Looking at the structure of the SSICH, the back portion of the 768 chip section of the 1.25msec time interval consisting of 1,536 chips can be used as a section for transmitting the SSI.

Referring to FIG. 1B, the SSICH is transmitted to 768 chips in a 1.25ms interval. In addition, the information of the SSICH may be transmitted in the second half of the 1.25ms interval, which takes into account the temporal correspondence of the forward and reverse channels. In addition, the information of the SSICH may be composed of three bits, which is to distinguish a maximum of eight sectors (Serving Sector). Although the description has been made on the assumption that the information of the SSICH consists of 3 bits, the number of information bits of the SI channel may be extended or reduced.

2 illustrates an ASICH and DRQSCH transmitter structure in a system proposed in an embodiment of the present invention.

Referring to the configuration of FIG. 2, the information of the AISCH indicating ACK (Acknowledge) or NAK (Non-acknowledge) for the packet data received in the forward direction is 4 bits and is input to the block coder 21 and encoded into 12 symbols. In this case, the block coder 21 may be a (12, 4) encoder. The information of the AISCH encoded as described above is inputted to the repeater 42 again and repeated twice in sequence by the set repetition rate (factor = 2) and outputted as 24 symbols. In addition, the information of the DRISCH for the next slot packet data transmission of the forward link is 4 bits, input to the block coder 23, and encoded into 12 symbols. In this case, the block coder 43 may also be a (12, 4) encoder. The information of the DRQSHC coded as described above is inputted to the repeater 24 again, and is repeated two times by the set repetition rate (factor = 2) and outputted as 24 symbols. Thereafter, the information of the AISCH and DRQSCH output from the repeaters 22 and 24 is multiplexed by the multiplexer 25 and output as shown in FIG. 1A. At this time, in the embodiment of the present invention, as shown in FIG. 1A, the information of the AISCH is transmitted in the first half and the information of the DRQSCH is transmitted in the second half in a 1.25ms period.

Referring to the operation of FIG. 2A, as described above, the AISCH is a channel for transmitting 4-bit AI (Acknowledgement Indicator) information updated every 1.25 msec. Up to four MQCCHs (Multiple Quality Control Channels) with different QoS requirements can be supported on the forward link, and one bit of AI information is required for each MQCCH, so four bits of AI information are generated every 1.25 msec. Four bits of AI information generated every 1.25 msec are input to the (12, 4) block coder 21. The sequence of 12 symbols of the (12, 4) block coder 21 is input to a sequence repeater 22 and repeated twice. The sequence of 24 symbols, which is the output of the sequence iterator 22, is input to a multiplexer 25. Four bits of Data Rate Request (DRQ) information updated every 1.25 msec are input to the (12, 4) block coder 23. The sequence of 12 symbols, which are outputs of the (12, 4) block coder 23, is input to the sequence repeater 24 and repeated twice. The sequence of 24 symbols that is the output of sequence iterator 24 is input to multiplexer 24. The output sequence of sequence repeater 22 and the output sequence of sequence repeater 24 are multiplexed and output by multiplexer 25.

3 is a diagram illustrating the structure of the SSICH transmitter in the system proposed in the present invention.

Referring to the configuration of FIG. 3, in the forward packet traffic transmission view, the 3-bit information of the SSICH representing the maximum transmittable sector information is input to the block coder 31 and encoded into 12 symbols. In this case, the block coder 31 may be a (12, 3) encoder. The information of the SSICH encoded as described above is inputted to the repeater 32 again, and is repeated two times at a set repetition rate (factor = 2) to output 24 symbols.

Referring to the operation of FIG. 3, the SSICH is used for designating a base station to transmit a physical layer packet in association with information transmitted through a DRQSCH, and a channel for transmitting 3-bit information updated in 1.25 msec units. to be. Three bits of selected sector indicator (SSI) information updated in units of 1.25 msec are input to the (12, 3) block coder 31. The sequence of 12 symbols, which are the outputs of the (12, 3) block coder 31, is input to the sequence repeater 321, repeated twice, and then output as 24 symbols.

4 is a diagram illustrating a structure of a DRISCH and QMISCH transmitter according to an embodiment of the present invention.

Looking at the configuration of Figure 4, the terminal can transmit in the reverse direction When the information of the DRISCH indicating the data rate and the information of the QMISCH indicating QoS matching information for the current data channel frame (supplemental channel frame) are input to the multiplexer 41, the multiplexer 41 The information of these channels is multiplexed in units of frames and output. Then, the block coder 42 blocks the multiplexed information at a set coding rate to generate symbols. Thereafter, the symbol sequences output from the block coder 42 are input to a sequence repeater 43, and the sequence repeater 43 repeatedly outputs the input symbol sequences according to a set repetition factor. In addition, the symbols output from the sequence repeater 43 are input to the symbol repeater 44, and the symbol repeater 44 repeatedly outputs the input symbols according to a set repetition factor j.

Accordingly, the information of the DRISCH and QMISCH is multiplexed in units of frames and then block coded according to the set coding rate, and the coded symbols are sequentially repeated and outputted by the set repetition rate.

Referring to the operation of FIG. 4, the DRISCH is a channel for transmitting 3-bit data rate indicator (DRI) information updated every 20 msec. The QMISCH is a channel for transmitting Quality Matching Indicator (QMI) information updated every 20 msec. The QMISCH may be 5 bits or 7 bits. It is input to the 3-bit DRI information and the 5-bit or 7-bit multiplexer 41 and multiplexed. The output of the multiplexer 41 is input to the block coder 42. The output sequence of the block coder 42 is input to the sequence iterator 43. The output sequence of the sequence repeater 43 is input to the symbol repeater 44, and each of the input bits is output through a symbol repetition process.

5A and 5BMS show a structure of multiplexing 3-bit DRI information and 5-bit QMI information. 5A and 5B show the output of the multiplexer 41 when QMI (Quality Matching Indicator) information updated every 20 msec is 5 bits.

When multiplexing the 3 bit DRI information and the 5 bit QMI information, as shown in FIG. 5A, the 3 bit DRI information may be placed at the front and the 5 bit QMI information may be placed at the back, as shown in FIG. 5B. You can put 5-bit QMI information at the beginning and 3-bit DRI information at the end. As a block coder 41 for channel encoding of a continuously connected 8-bit information sequence, a (24, 8) block coder, a (48, 8) block coder or a (192, 8) block coder can be used.

FIG. 6 illustrates an embodiment in which an 8-bit sequence of information consecutively connected in the order of 5-bit QMI information and 3-bit DRI information uses a (24,8) block coder for channel encoding.

Referring to FIG. 6, an 8-bit information sequence 600 continuously connected in the order of 5-bit QMI information and 3-bit DRI information is encoded by a (24,8) block code, and as a result of the encoding, an encoded symbol of 24 symbols Sequence 601 is generated. A coded symbol sequence 601 of 24 symbols is repeated 8 times, and a sequence 602 of 8 times of encoded symbol sequences of 24 symbols is generated. Each symbol constituting the sequence 602 in which an encoded symbol sequence of 24 symbols is repeated eight times is repeated four times to generate a sequence 603 including a total of 768 symbols.

FIG. 7 shows an embodiment in which a (48,8) block coder is used for channel encoding of an 8-bit sequence of information sequentially connected in the order of 5-bit QMI information and 3-bit DRI information.

Referring to FIG. 7, the 8-bit information sequence 700 consecutively connected in the order of 5-bit QMI information and 3-bit DRI information is encoded by a (48,8) block code, and as a result of the encoding, an encoded symbol of 48 symbols Sequence 701 is generated. The coded symbol sequence 701 of 48 symbols is repeated eight times, and a sequence 702 is generated in which the coded symbol sequence of 48 symbols is repeated eight times. Each symbol constituting the sequence 702 in which the encoded symbol sequence of the 48 symbols is repeated eight times is repeated two times to generate a sequence 703 consisting of a total of 768 symbols.

FIG. 8 illustrates an embodiment in which (192,8) block codes are used for channel encoding of an 8-bit information sequence sequentially connected in the order of 5-bit QMI information and 3-bit DRI information.

Referring to FIG. 8, an 8-bit information sequence 800 continuously connected in the order of 5-bit QMI information and 3-bit DRI information is encoded by a (192,8) block code, and as a result of encoding, an encoded symbol of 192 symbols. Sequence 801 is generated. The encoded symbol sequence 801 of the 192 symbols is repeated four times, and the sequence 802 is repeated four times of the encoded bit sequence of the 192 symbols.

The number of sequence repetitions and symbol repetitions according to a block code used for channel encoding of 3-bit DRI information and 5-bit QMI information disclosed in FIGS. 6 to 7 is shown in Table 2 below. Table 2 below shows the number of sequence repetitions and symbol repetitions according to a block code used for channel encoding of 3-bit DRI information and 5-bit QMI information.

Sequence repeat count Symbol iterations (24,8) block code 8 4 (48,8) block code 8 2 (192,8) block code 4 One

When the quality matching indicator (QMI) information updated every 20 msec is 7 bits, the output of the multiplexer 400 multiplexing the 3-bit DRI information and the 7-bit QMI information may be preceded by 3-bit DRI information and followed by 7-bit QMI information. In addition, 7-bit QMI information may be preceded by 3-bit DRI information.

When the QMI information is 7 bits, the (48, 10) block code may be used for channel encoding of a 10-bit information sequence in which 3-bit DRI information and 7-bit QMI information are continuously connected. The 10-bit information sequence multiplexed with the QMI information and the DRI information is encoded by a (48,10) block code. As a result of the encoding, a coded symbol sequence of 48 symbols is generated. The coded symbol sequence of 48 symbols is repeated eight times. Each symbol constituting the sequence in which the coded symbol sequence of 48 symbols is repeated eight times is repeated two times to generate a sequence consisting of a total of 768 symbols.

When the QMI information is 7 bits, the (48, 10) block code may be used for channel encoding of a 10-bit information sequence in which 3-bit DRI information and 7-bit QMI information are continuously connected. The 10-bit information sequence multiplexed with the QMI information and the DRI information is encoded by a (48,10) block code. As a result of the encoding, a coded symbol sequence of 48 symbols is generated. The coded symbol sequence of 48 symbols is repeated four times. Each symbol constituting the sequence in which the coded symbol sequence of 48 symbols is repeated four times is repeated four times to generate a sequence consisting of a total of 768 symbols.

Table 3 shows the number of sequence repetitions and symbol repetitions according to the block code used for channel coding of 3-bit DRI information and 7-bit QMI information. Table 3 below shows the number of sequence repetitions and symbol repetitions according to a block code used for channel encoding of 3-bit DRI information and 7-bit QMI information.

Sequence repeat count Symbol repeat count (48,10) block code 8 2 (48,10) block code 4 4

FIG. 9 is a diagram illustrating a configuration for orthogonal spreading and radio frequency (RF) band frequency transition for a reverse link channel according to an embodiment of the present invention. 9 illustrates a structure in which various channel signals of a reverse link as shown in FIGS. 2 to 4 are orthogonally spread and converted into a signal suitable for transmission to a base station by frequency shifting into a signal of an RF band.

Referring to the configuration of FIG. 9, the information of the uplink additional channel 2 is multiplied by the Walsh code assigned to the corresponding channel in the spreader 101, and then spreads, and the gain is adjusted in the gain controller 111 and applied to the I-channel adder 121. Information of the reverse pilot channel is applied to the I-channel adder 121. The information of the reverse dedicated control channel is multiplied by the Walsh code assigned to the corresponding channel in the spreader 102, and the channel is spread. Then, the gain is adjusted in the gain controller 112 and applied to the I-channel adder 121. The information of the backward AISCH and the DRQSCH has a structure as shown in FIG. 1A by performing the same process as shown in FIG. 2, and multiplied by a Walsh code assigned to the corresponding channel in the spreader 103 (assuming W ³² ₁₂ ). In the gain controller 113, the gain is adjusted and applied to the I-channel adder 121. The information of the reverse DRISCH and the QRISCH has a structure as shown in Figs. 5A and 5B generated through the configuration as shown in Fig. 4, and is multiplied by the Walsh code assigned to the corresponding channel in the spreader 104 (assuming W ³² ₁₆ here). After channel spread, the gain is adjusted in the gain controller 114 and applied to the I-channel adder 121. The information of the uplink SSICH has a structure as shown in FIG. 1B by performing the same process as shown in FIG. 3, and multiplies the Walsh code assigned to the corresponding channel in the spreader 105 (assuming W ³² ₂₈ ). The gain is adjusted at the controller 115 and applied to the I-channel adder. The I-channel adder 121 adds the signals of the input channels and outputs the data of the I-channel.

The information of the reverse base channel is multiplied by the Walsh code assigned to the corresponding channel in the spreader 106, and the channel is spread. The gain is adjusted in the gain controller 116 and applied to the Q channel adder 122. The information of the uplink additional channel 1, the uplink common control channel, and the uplink enhancement access channel are also multiplied by the Walsh codes assigned to the corresponding channel in the corresponding multipliers, respectively, and the channel is spread, and then the gain is adjusted in the corresponding gain controller. Is applied to the Q-channel adder 122. The adder 122 of the Q channel adds the signals of the input channels and outputs the data of the Q channel.

The data of the channels applied to the adders 121 and 122 of the I and Q channels may be applied to other channels as necessary.

The data output from the I and Q channel adders 121 and 122 are multiplied by a spread spectrum code (assuming PN code in this case) in the complex multiplier 131, and the spread signals are spread in the baseband filters 132 and 133. Filtered into baseband, respectively, multiplied by the carrier in multipliers 134 and 135, and then added and output in adder 136.

Referring to FIG. 9, a pilot channel (PICH), a dedicated control channel (DCCH), a supplemental channel 2 (SCH2), and the like, use an I-ch of a reverse link together with MAC channels such as AISCH, DRQSCH, DRISCH, QMISCH, and SSICH. Is sent through. SCH2 is input to Walsh spreader 101 and spread by W ₁ ² , W ₂ ⁴ , or W ₆ ⁸ depending on the rate. The output of the Walsh diffuser 101 is input to the relative gain controller 111 and then output after the gain is adjusted. DCCH enters Walsh diffuser 102 and is spread by W ₈ ¹⁶ . The output of the Walsh diffuser 102 is input to the relative gain controller 112 and then gain adjusted. AISCH and DRQSCH are input to Walsh spreader 103 and spread by W ₁₂ ³² . The output of the Walsh diffuser 103 is input to the relative gain controller 113 and then output after being gain adjusted. DRISCH and QMISCH are input to Walsh spreader 104 and spread by W ₁₆ ³² . The output of the Walsh diffuser 104 is input to the relative gain controller 114, after gain adjustment and output. SSICH is input to Walsh diffuser 105 and spread by W ₂₈ ³² . The output of the Walsh diffuser 105 is input to the relative gain controller 115, after gain adjustment and output. The first adder 121 is the SCH2 output of the relative gain controller 111, the PICH, the DCCH output of the relative gain controller 112, the AISCH and DRQSCH output of the relative gain controller 113, and the DRISCH and QMISCH output of the relative gain controller 114. And the SSICH which is the output of the relative gain controller 115 are summed and output.

In addition, the FCH (Fundamental Channel) and SCH1 (Supplemental Channel 1) or CCCH (Common Control Channel) or EACH (Enhanced Access Channel) are transmitted through the Q-ch of the reverse link. FCH is input to Walsh diffuser 106 and spread by W ₇ ¹⁶ . The output of the Walsh diffuser 106 is input to the relative gain controller 116 and adjusted after gain adjustment. SCH1 or CCCH or EACH is input to Walsh spreader 107 and spread by W ₁ ² , W ₂ ⁴ , or W ₃ ⁸ depending on the transmission rate. The output of Walsh diffuser 107 is input to relative gain controller 117 and then adjusted. The second adder 122 sums the FCH output of the relative gain controller 116 and the SCH1 or CCCH or EACH output of the relative gain controller 117 and outputs the sum.

The quadrature spreader 131 applying the hybrid phase shift keying (HPSK) method uses a spreading sequence consisting of a first channel (I-ch) spreading sequence and a second channel (Q-ch) spreading sequence. After complex spreading (or complex multiplying) an input signal composed of the outputs of the adder 121 and the second adder 122, the spread first channel I-ch signal and the second channel Q-ch signal are output. . The first channel I-ch signal output from the complex multiplier 131 is input to the baseband filter 132 and low-pass filtered. The second channel Q-ch signal output from the complex multiplier 131 is input to the baseband filter 134 and low-pass filtered. The output of the baseband filter 132 is input to the multiplier 133, which is a frequency shifter, and is shifted to the RF band by multiplying with the first frequency cos2? Fct. Transition to RF band by multiplication with The adder 135 sums the output signal of the frequency multiplier 133 and the output signal of the multiplier 135. The summation signal by the adder 906 is emitted through an antenna (not shown).

As described above, an embodiment of the present invention relates to a communication system using a 1x bandwidth of 1.25 MHz, and a channel structure and a transmitter structure capable of supporting multimedia services more efficiently and faster for forward and reverse channels. To provide. The system according to an embodiment of the present invention has a channel structure capable of supporting a multi-physical subchannel capable of QoS control and more efficient retransmission for a multimedia service, and has an advantage of increasing a transmission speed of a reverse link.

Claims (11)

A reverse channel transmitting apparatus of a terminal of a mobile communication system supporting a multimedia service, An AISCH message generator for generating response information by analyzing packet data of a forward link transmitted from a base station; A coder for generating a symbol sequence by block coding the AISCH message at a set coding rate; A repeater for repeating the symbol sequence of the AISCH at a set repetition rate; And a channel spreader configured to spread the output of the repeater with an orthogonal code of an allocated ACK channel. A reverse channel transmitting apparatus of a terminal of a mobile communication system supporting a multimedia service, A DRQSCH message generator for generating a rate information for notifying the base station of the rate of a supportable terminal by checking a time-varying channel condition and the number of orthogonal codes available in the forward direction for the forward additional channel transmitted from the base station; A coder for generating a symbol sequence by block coding the DRQSCH message at a set coding rate; A repeater for repeating the symbol sequence of the DRQSCH at a set repetition rate; And a channel spreader for channel spreading the output of the repeater to an orthogonal code of an allocated DRQSCH. A reverse channel transmitting apparatus of a terminal of a mobile communication system supporting a multimedia service, An AISCH transmitter for generating response information by analyzing packet data of a forward link transmitted from a base station, and coding and sequence repeating the generated AISCH information; By checking the time-varying channel condition and the number of orthogonal codes available in the forward direction for the forward additional channel transmitted from the base station, the rate information is generated for notifying the base station of the support rate of the supportable terminal, and coding the generated DRQSCH information. A DRQSCH transmitter for repeating the sequence, A multiplexer for multiplexing the information of the AISCH and the information of the DRQSCh on a predetermined interval basis; And a channel spreader for channel spreading the output of the multiplexer with an orthogonal code of an assigned AISCH / DRQSCH. A reverse channel transmitting apparatus of a terminal of a mobile communication system supporting a multimedia service, An SSICH message generator which checks the number of available C / Is and available orthogonal codes and generates sector information that can be transmitted at the time of forward packet traffic transmission; A coder for generating a symbol sequence by block coding the SSICH message at an encoding rate; A repeater for repeating the symbol sequence of the SSICH at a set repetition rate; And a channel spreader for channel spreading the output of the repeater with an orthogonal code of the assigned SSICH. A reverse channel transmitting apparatus of a terminal of a mobile communication system supporting a multimedia service, A QMISCH message generator for generating QoS matching information for the current additional channel frame; A coder for generating a symbol sequence by block coding the QMISCH message at a code rate; A repeater for repeating the symbol sequence of the QMISCH with a set repetition rate; And a channel spreader for channel spreading the output of the repeater with an orthogonal code of the assigned QMISCH. A reverse channel transmitting apparatus of a terminal of a mobile communication system supporting a multimedia service, A DRISCH message generator for generating rate information for data that the terminal can transmit in the reverse direction; A coder for generating a symbol sequence by block coding the DRISCH message at a coding rate; A repeater for repeating the symbols of the DRISCH at a set repetition rate; And a channel spreader configured to spread the output of the repeater with an orthogonal code of an assigned QMI channel. A reverse channel transmitting apparatus of a terminal of a mobile communication system supporting a multimedia service, Next, a multiplexer for multiplexing on a frame-by-frame basis the DRISCH information, which is data rate information for data that the UE can transmit in the reverse direction, and QMISCH information, which is QoS matching information for the current additional channel frame, A coder for generating a symbol sequence by block coding the multiplexed DRISCH and QMISCH information at a set coding rate; A repeater for repeating the symbols at a set repetition rate; And a channel spreader configured to spread the output of the repeater with an orthogonal code of an allocated DRISCH / QMISCH. A reverse channel transmitting apparatus of a terminal of a mobile communication system supporting a multimedia service, An AISCH transmitter for generating AISCH information by analyzing packet data of a forward link transmitted from a base station, and coding and sequence repeating the information of the generated AISCH, and in a time-varying channel situation and forward direction for a forward additional channel transmitted from a base station. A DRQSCH transmitter for generating a transmission rate information for notifying a base station of a transmission rate of a supportable terminal by checking the number of available orthogonal codes, and coding and sequence repeating the generated rate information, and information of the AISCH and DRQSCH. An AISCH / DRQSCH transmitter comprising a multiplexer for multiplexing and outputting a predetermined time interval, and a channel spreader for channel spreading the multiplexed information with an orthogonal code of an assigned AISCH / DRQSCH; A coder for generating a symbol sequence by checking the number of available CIRs and the available orthogonal codes and block-coding sector information that can be transmitted at the time of forward packet traffic transmission at a set coding rate, and an iterator for repeating the coded symbol sequences at a set repetition rate And a channel spreader comprising a channel spreader for channel spreading the output of the repeater with an orthogonal code of the assigned SSICH; Next, a multiplexer for multiplexing the information of DRISCH, which is data rate information for data that the UE can transmit in the reverse direction, and QMISCH, which is QoS matching information for the current additional channel frame, on a frame basis, and blocks the multiplexed information at a set coding rate. A coder for generating a symbol sequence by coding, a repeater for repeating the symbols at a set repetition rate, and a channel spreader for channel spreading the output of the repeater with an orthogonal code of an allocated DRISCH / QMISCH channel. Reverse channel transmission apparatus of a terminal of a mobile communication system supporting a multimedia service, characterized in that configured. A method of transmitting a reverse channel of a terminal of a mobile communication system supporting a multimedia service, Analyzes packet data of the forward link transmitted from the base station, checks the time-varying channel status and the number of orthogonal codes available in the forward direction for the information of the AISCH and the forward additional channel transmitted from the base station, and informs the base station of the transmission rate of the supporting terminal. Generating rate information of a DRQSCH for performing the above operation; Coding and sequence repeating the information of the generated AISCH and DRQSCH; Multiplexing the information of the AISCH and the information of the DRQSCH by a predetermined time unit; And spreading the multiplexed information with an orthogonal code of an allocated AISCH / DRQSCH. A method of transmitting a reverse channel of a terminal of a mobile communication system supporting a multimedia service, Generating sector information that can be transmitted at the time of forward packet traffic transmission by examining the number of available CIRs and the available orthogonal codes; Generating a symbol sequence by block coding the sector information at a set coding rate; Repeating the encoded symbol sequence at a set repetition rate; And spreading the repeated symbol sequences through orthogonal codes of the allocated SSICHs. A reverse channel transmitting apparatus of a terminal of a mobile communication system supporting a multimedia service, Next, multiplexing the information of DIRSCH, which is data rate information for data that the UE can transmit in the reverse direction, and QMISCH, which is QoS matching information for the current additional channel frame, on a frame basis; Generating a symbol sequence by block coding the multiplexed information at a set coding rate; Repeating the symbols at a set repetition rate; And transmitting the repeated information to an orthogonal code of an allocated DRISCH / QMISCH. The method of claim 1, wherein the terminal of the mobile communication system supports a multimedia service.