• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    The present invention is an effective power control method for maintaining the call quality of a voice channel when the mobile station supports the voice channel in a CDMA high-speed data transmission system that measures the channel state of the forward link to determine the forward data rate. . In order to simultaneously support voice channel and high speed data channel in the same frequency band, forward power control bit (PCB) should be transmitted to reverse link, and forward power control information is transmitted by using DRC section, which is information to inform data rate of forward link. do.
    公开号:KR20020004452A
    申请号:KR1020000038346
    申请日:2000-07-05
    公开日:2002-01-16
    发明作者:허훈；윤유석；윤순영；염재흥；양상현；강희원
    申请人:윤종용；삼성전자 주식회사；
    IPC主号:
    专利说明:

    Forward power control device and method in mobile communication system supporting voice service and high speed data service at the same time {APPARATUS AND METHOD FOR CONTROLLING FORWARD POWER TO SUPPORT VOICE SERVICE AND FAST DATA SERVICE IN MOBILE COMMUNICATION SYSTEM}
    [27] The present invention relates to a mobile communication system, and more particularly, to a power control apparatus and method for simultaneously supporting a high speed data service and a voice service.
    [28] The IMT-2000 system, proposed as the next generation mobile communication system, is a technology that enables high-speed data transmission in any area. The US-based IMT-2000 standard, IS-2000 1X (bandwidth 1.25 MHz), supports voice and data channels simultaneously. In the IS-2000 1X system, as long as the transmission information exists, the data channel is sent at high transmission power by controlling power with low data rate even if the channel condition is bad, and also changing the data rate of the forward link according to the channel condition. long. Thus, in IS-2000 1X systems, the data rate of the forward link does not adapt quickly to the state of the channel (in other words, the link adaptation is slow). If the base station transmits forward data to a data user having a poor channel condition, the base station loses the opportunity to send more information amount at the same power to the data user having a good channel condition.
    [29] Meanwhile, in the IS-2000 1X system, a first reverse power control subchannel responsible for forward voice channel power control information and a second reverse power responsible for power control information of a data channel, as shown in Table 1 below. The secondary reverse power control subchannel controls power of the forward voice channel and the data channel.
    [30] Reverse Power Control Subchannel Allocations (Power Control Group Number 0-15) FPC_MODEs Primary Reverse PowerControl Subchannel Secondary Reverse PowerControl Subchannel '000' 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 Not supported '001' 0,2,4,6,8,10,12,14 1,3,5,7,9,11,13,15 '010' 1,5,9,13 0,2,3,4,6,7,8,10,11,12,14,15 '011' 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 Not supported '100' 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 Not supported '101' 0,2,4,6,8,10,12,14 1,3,5,7,9,11,13,15 '110' 0,2,4,6,8,10,12,14 1,3,5,7,9,11,13,15 All other values Reversed Reversed
    [31] FIG. 1 is a diagram for explaining that, in an IS-2000 system according to the related art, reverse power control information is inserted into a reverse pilot channel through a reverse power control subchannel and transmitted to a base station. (a) shows a multiplexing apparatus 10 for multiplexing pilot bits and power control bits, (b) shows one power control group in the reverse pilot channel with power control information inserted in time, and (C) A reverse pilot channel frame divided into 16 power control groups is shown. Here, one power control group has a time interval of 1.25 ms, and a hatched portion represents a reverse power control subchannel through which power control information is transmitted.
    [32] On the other hand, High Data Rate (HDR) proposed by Qualcomm to complement IS-2000's data communication is a method of transmitting a single data channel to a user with good channel status at maximum power through a forward link. In the existing IS-2000 1X system, the packet length is constant according to the channel status and data rate, and the power is changed by the power control. However, in HDR, the packet length varies according to the channel state and data rate, and the power is kept at the maximum power. In other words, HDR is a transmission method that accelerates channel adaptation and transmits only one user at a forward data rate suitable for maximum transmission power, and takes a variable packet length.
    [33] 2 shows a transmitter of the forward link of an HDR system according to the prior art. Referring to FIG. 2, the multiplier 101 multiplies orthogonally spreads pilot channel data all'0's and a predetermined orthogonal code W0 to output a pilot channel signal.
    [34] Referring to the data traffic channel, the encoder 102 encodes and outputs the data traffic channel data. The modulator 103 performs QPSK modulation on the output of the encoder 102 to output I and Q signals. The interleaver 104 interleaves and outputs the output from the modulator 103. The punching pattern machine 105 punches and repeats the output from the interleaver 104 by a predetermined pattern. The demultiplexer 106 demultiplexes the output from the puncturing pattern 105 and outputs the demultiplexer. The quadrature spreader 107 multiplies the output from the demultiplexer 106 by an orthogonal code having a given length of 16 and outputs the orthogonal spread. The iterator 110 repeatedly outputs the preamble data a predetermined number of times. The multiplier 111 multiplies an output from the repeater 110 by a given orthogonal code and orthogonally spreads the preamble signal. The multiplexer 109 performs time division multiplexing on the data traffic channel signal from the quadrature spreader 107 and the preamble signal from the multiplier 111.
    [35] When describing the MAC channel, the multiplier 113 multiplies the forward activity bit (hereinafter referred to as FAB) by a predetermined orthogonal code (W1) and outputs the orthogonal spread. The gain regulator 112 adjusts and outputs the channel gain of the reverse power control bit (hereinafter referred to as RPC). The multiplier 114 multiplies the output from the gain regulator 112 by an orthogonal code having a period 32 and outputs the orthogonal spread. The multiplier 115 multiplies a reverse activity bit (hereinafter referred to as RAB) with a predetermined orthogonal code (W2) and outputs the orthogonal spread. The adder 116 adds and outputs the outputs from the multiplier 113, the multiplier 114, and the multiplier 115. The iterator 114 repeatedly outputs the output from the adder 139 a predetermined number of times (factor = 4).
    [36] The multiplexer 118 multiplexes the pilot channel signal from the multiplier 101, the traffic channel signal from the multiplexer 109, and the MAC channel signal from the repeater 117. The complex spreader 119 multiplies the output from the multiplexer 118 by a predetermined PN code and outputs the complex spreader. The band filter 120 bases the output from the complex spreader 119 and outputs it. In addition, the output of the bandpass filter 120 is adjusted upward and transmitted through an antenna.
    [37] As described above, it is shown in HDR that all channels of the forward link are time division multiplexed and transmitted on one transport channel, and the data traffic channel is code multiplexed on 16 orthogonal channels. There is a change in the operation of encoder 102 and modulator 103 by forward link data rate control (DRC) received on the reverse link. In other words, as the data rate increases, a coder having a large coding rate is used and a modulator with good frequency efficiency is used.
    [38] 3 illustrates a structure of a reverse transmitter of an HDR system according to the prior art.
    [39] Referring to FIG. 3, the multiplier 301 multiplies the pilot channel data by a predetermined orthogonal code (W o 4 ) and outputs the orthogonal diffusion. The quadrature modulator 302 outputs a symbol by performing an eight-ary quadrature modulation on a reverse rate indicator (hereinafter referred to as RRI). The symbol repeater 303 repeatedly outputs the symbol from the quadrature modulator 302 a predetermined number of times. The multiplier 304 multiplies the output of the symbol repeater 303 by the predetermined orthogonal code WO 4 and outputs the orthogonal spread.
    [40] The encoder 305 (4,4,4) block encodes and outputs 4bit DRC information. The iterator 306 repeatedly outputs the output codeword from the encoder 305 a predetermined number of times. The multiplier 307 multiplies the output from the repeater 306 by the orthogonal code W 0 2 of a given length and outputs the orthogonal spread. The Walsh cover unit 308 inputs a DRC Walsh cover index to output the sector separation Walsh cover. The multiplier 309 multiplies the output of the multiplier 307 by the output of the Walsh cover unit 308 and outputs the multiplier. The multiplier 310 multiplies the output of the multiplier 309 by the predetermined orthogonal code WO 4 and outputs the multiplier. The multiplexer 311 times-multiplexes the outputs of the multipliers 301, 304, and 310.
    [41] The encoder 312 encodes and outputs the input traffic data. The modulator 313 outputs the output from the encoder 312 by BPSK modulation. The interleaver 314 interleaves and outputs the output of the modulator 313. The gain regulator 315 adjusts the output of the interleaver 314 and outputs the gain. The multiplier 316 multiplies the output of the gain adjuster 315 by the orthogonal code W 2 4 having a predetermined length and outputs the multiplier. The complex spreader 317 multiplies and outputs the output of the multiplexer 311 (I channel signal) and the output of the multiplier 316 (Q channel signal) by a predetermined PN code. The filter 318 base-filters and outputs the output of the complex spreader 317. The filtered signal is adjusted upward and converted into a radio frequency signal and transmitted to the base station.
    [42] In the above description, the DRC Walsh Cover Index designates an index of one sector having the best channel state among active base stations of 8 transmittable sectors in 3Bit. The DRC symbol 4Bit specifies 14 transmitable data rates on the forward link. Table 2 below shows the mapping between the DRB symbol of 4Bit and the forward data rate. In the conventional HDR method, since the forward power control is not required, that is, the mobile station does not need to send the forward power control bit in the reverse direction, so there is no reverse PCB information as in the IS-2000 1X.
    [43] DRC value Rate (kbps) DRC value Rate (kbps) 0x0 null rate 0x8 921.6 0x1 38.4 0x9 1228.8 0x2 76.8 0xa 1843.2 0x3 102.4 0xb 2457.6 0x4 153.6 (short) 0xc Invalid 0x5 204.8 0xd 153.6 (long) 0x6 307.2 (short) 0xe 307.2 (long) 0x7 614.4 0xf Invalid
    [44] 4 illustrates a puncturing pattern of a reverse rate indicator (RRI) channel, a pilot channel, and a DRC channel in an HDR reverse link. The Reverse Rate Indicator (PRI) channel is a channel that transmits a data rate of a reverse traffic channel. DRC symbols transmitted on the DRC channel correspond one-to-one with each codeword of (8,4,4) bi-orthogonal codewords according to the data rate. Each bit of the 8-bit DRC symbol generated through block encoding is repeated once and spread by a two-length orthogonal code, and then spread again by a 3-bit walker cover indicating a sector. In addition, the DRC symbols spread with the Walsh code having a length of 4 again total 512 chips, which are repeated once again to fill all 1024 chips allocated to the slots of the DRC channel. The DRC chip is divided into 16 TDM slots in 64 chips, and is punctured as shown in FIG. 4 to be time-division multiplexed with pilot and RRI channels.
    [45] Since the HDR system does not support a voice service, when a mobile station wants to receive a voice service, the mobile station must move to an IS-2000 system frequency band and receive a voice service. That is, since a separate frequency band is required to support the HDR system, the base station has a disadvantage of increasing the capacity of the separate frequency allocation and the linear amplifier in order to support the separate frequency band. 5 illustrates a process of shifting a carrier frequency to an IS-2000 frequency band when the HDR and an IS-2000 system use different frequency bands and receive only packet data, and when receiving an HDR channel and receiving a voice channel. It is a figure.
    [46] That is, as described above, the IS-2000 system has a problem in transmitting high-speed data centered on a voice service, and since HDR supports only high-speed packet data transmission, there is a problem requiring a different frequency band to support a voice service. By changing the structure to enable the forward voice service in the HDR method, it is possible to simultaneously support the voice channel and the high-speed packet data service in the same frequency band. However, forward power control is required to maintain normal voice quality of the forward voice channel. However, since HDR does not support forward voice service, there is no technology related to forward power control.
    [47] Accordingly, an object of the present invention is to provide an apparatus and method for supporting a voice service in addition to a high-speed data service in a mobile communication system for high-speed data transmission, thereby effectively performing forward power control.
    [48] Another object of the present invention is to provide an apparatus and method for supporting voice service in an HDR system proposed for high-speed data transmission, and thereby effectively performing forward power control.
    [49] It is still another object of the present invention to provide an apparatus and method for performing forward power control with information on data rate control received from a mobile station in a proposed HDR system for high speed data transmission.
    [50] To achieve the above objects, a base station apparatus provides a channel receiver for receiving DRC information received on a reverse DRC channel from a specific mobile station, and a forward data rate to provide to the specific mobile station with the DRC information from the channel receiver. A DRC detector for determining and calculating the received power for the voice channel requested by the specific mobile station with the DRC information from the channel receiver, and considering the maximum possible transmit power of the voice channel, the forward transmit power for the specific mobile station It characterized in that it comprises a forward power controller for controlling.
    [1] 1 is a diagram illustrating a structure of a reverse power control subchannel in an IS-2000 1X system according to the prior art.
    [2] 2 is a diagram illustrating a base station transmitter in an HDR system supporting high speed data transmission according to the prior art;
    [3] 3 is a diagram showing a mobile station transmitter in an HDR system supporting high speed data transmission according to the prior art;
    [4] 4 is a diagram illustrating the transmission of RRI, DRC, and Pilot information transmitted in the reverse direction in a high-speed data transmission method HDR system according to the prior art in a time division multiplexing scheme.
    [5] 5 is a diagram illustrating a transition from the HDR frequency band to the IS-2000 frequency band when the HDR system of the high speed data transmission method according to the related art receives a voice traffic channel.
    [6] 6 is a diagram illustrating a base station transmitter in which a high speed data channel and a voice channel are mixed in a high speed data transmission type HDR system according to an exemplary embodiment of the present invention.
    [7] FIG. 7 is a diagram illustrating an apparatus for generating a voice traffic channel when the high speed data transmission type HDR system supports the high speed data channel and the voice channel at the same time. FIG.
    [8] 8 illustrates an apparatus for power control of a forward voice traffic channel and detection of a DRC by receiving a pilot and a DRC channel at a base station for a specific (kth) user according to an embodiment of the present invention.
    [9] 9 is a diagram illustrating a procedure for controlling voice channel forward power using the DRC received in FIG. 8 according to an embodiment of the present invention.
    [10] FIG. 10 is a diagram illustrating a procedure for controlling voice channel forward power using Ec / I received in FIG. 8.
    [11] 11 illustrates an apparatus for generating C / I and differential C / I by a mobile station according to an embodiment of the present invention.
    [12] 12 is a diagram illustrating a method for obtaining a DRC using a C / I (Ec / I) by a base station and a mobile station according to an embodiment of the present invention.
    [13] FIG. 13 illustrates an apparatus for a mobile station to periodically generate 4 bits of DRC according to an embodiment of the present invention and to generate data differential C / I 4 bits between them; FIG.
    [14] 14 is a diagram illustrating a transmitter for transmitting, by a mobile station, 4 bits of DRC (Ec / I) and 4 bits of differential C / I information according to an embodiment of the present invention.
    [15] FIG. 15 is a diagram illustrating a base station receiver in FIG. 14, illustrating an apparatus for forward data rate determination and forward power control through receive DRC (Ec / I) and differential C / I. FIG.
    [16] FIG. 16 is a diagram illustrating a procedure of forward power control through 4 bits of DRC (Ec / I) and 4 bits of differential C / I transmitted in 15;
    [17] 17 illustrates a mobile station transmitter for transmitting DRC (Ec / I) 4Bit and differential DRC or C / I 2 bits according to an embodiment of the present invention.
    [18] 18 is a diagram illustrating data rate for a data channel and channel gain for a voice channel when receiving DRC (Ec / I) 4 bits periodically and receiving information about a differential DRC therebetween according to an embodiment of the present invention. A diagram showing an apparatus for obtaining the system.
    [19] FIG. 19 is a diagram illustrating a procedure of forward power control using periodic DRC (C / I) 4 bits and differential DRC 2 bits at the base station receiving end 17. FIG.
    [20] 20 shows a mobile station periodically transmitting DRC (Ec / I) 4-bit information and transmitting a differential DRC (C / I) 2-bit information with the 17 in between, and performing a differential DRC (C / I). 2 bits after sending 2 bits to transmit forward power control information to perform forward power control.
    [21] 21 illustrates a base station using periodic DRC (C / I) 4-bit information, multiplexed differential DRC (C / I) 2-bit information, and 2-bit forward power control information transmitted by a k-th user according to an embodiment of the present invention; Figure 2 shows an apparatus for determining this forward power control and forward data rate.
    [22] FIG. 22 illustrates an apparatus for forward power control using the received forward power control information with the receiving device of FIG. 20; FIG.
    [23] 23 is a diagram showing a base station transmitter compatible with IS-2000 according to an embodiment of the present invention.
    [24] 24 illustrates a method for obtaining a reception power-to-interference ratio of a data channel in the case of a base station transmitter that is compatible with an IS-2000 in which a pilot channel is assigned to code multiplexing and distributed pilot symbols are assigned to a data channel according to an embodiment of the present invention. Figure showing a device.
    [25] FIG. 25 illustrates an apparatus for obtaining a reception power to interference ratio of a data channel when the DRC 4-bit information is used instead of the reception power to interference ratio of the data channel in FIG. 24;
    [26] FIG. 26 illustrates 4-bit information about data Ec / I transmitted by a mobile station in a system compatible with IS-2000 in which a pilot channel is assigned to code multiplexing and distributed pilot symbols are assigned to a data channel according to an embodiment of the present invention. A diagram showing a procedure of forward power control using.
    [51] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Meanwhile, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.
    [52] 6 illustrates a structure of a base station transmitter which simultaneously supports a voice service and a high speed data service according to an exemplary embodiment of the present invention. FIG. 6 shows a base station transmitter that is incompatible with IS-2000 and supports a high-speed data channel simultaneously by allocating a predetermined power and a predetermined channel to a voice channel in an HDR scheme.
    [53] The multiplier 601 multiplies orthogonally spreads pilot channel data all '0's and a predetermined orthogonal code W0 to output a pilot channel signal.
    [54] When describing the voice traffic channel, the tail bit generator 602 generates an error correction bit (CRC) and tail bits corresponding to the data by inputting the voice traffic channel data and attaching the data to the end of the data. The encoder 603 encodes the output data of the tail bit generator 602 and outputs coded symbol data. The encoder 603 uses a convolutional encoder or the like. The puncturing pattern 604 punctures and repeatedly outputs the output data of the encoder 603 by the given pattern. The interleaver 605 interleaves and outputs the output of the puncturing patterner 604. The modulator 606 modulates the output of the puncturing pattern 604 to output I and Q signals. Orthogonal spreader 607 multiplies the output of modulator 606 by a given orthogonal code and orthogonally spreads the result. The gain adjuster 608 inputs a gain control signal for voice traffic from an upper controller, and adjusts the output from the quadrature spreader 607 by the gain control signal to output a voice traffic channel signal.
    [55] Referring to the data traffic channel, the encoder 609 encodes and outputs the data traffic channel data. The modulator 610 QPSK modulates the output of the encoder 609 to output I and Q signals. The interleaver 611 interleaves and outputs the output of the modulator 610. The puncturing patterner 612 punctures and repeatedly outputs the output of the interleaver 611 by the given pattern. The demultiplexer 613 demultiplexes (or parallel converts) the output from the puncturing pattern 612 and outputs the demultiplexer. The orthogonal spreader 614 multiplies the output of the demultiplexer 613 by an orthogonal code having a given length of 16 and outputs the orthogonal spread. The gain regulator 615 adjusts the output of the quadrature spreader 614 to output a data traffic channel signal. In general, the data traffic channel is gain-adjusted to use the remaining power after subtracting the transmission power of the voice traffic channel from the total transmission power. The iterator 616 repeatedly outputs the preamble data a predetermined number of times. The multiplier 617 multiplies the output of the repeater 616 by a given orthogonal code and orthogonally spreads the preamble signal. Here, the preamble signal is divided into users by extending the Walsh code of the data channel having a period of 16 to the Walsh code having a period of 32 (in this case, the number of data channel users is twice the data Walsh channel). Therefore, the length of the preamble is different.
    [56] When describing the MAC channel, the multiplier 619 multiplies the forward activity bit (hereinafter referred to as "FAB") and a predetermined orthogonal code (W1) and outputs the orthogonal spread. The gain regulator 618 multiplies the reverse power control bit (referred to herein as "RPC") and the Walsh code having a period of 32 to output an orthogonal spread. The reverse power control bit extends the Walsh code of the data channel having a period of 16 to the Walsh code having a period of 32 and transmits it to a specific user. The multiplier 621 multiplies a reverse activity bit (hereinafter referred to as "RAB") with a predetermined orthogonal code and outputs the orthogonal spread. The adder 622 adds and outputs the outputs of the multipliers 619, 620, and 621. The iterator 623 repeatedly outputs the output of the adder 622 a predetermined number of times.
    [57] The multiplexer 624 time division multiplexes the data traffic channel signal from the gain adjuster 615, the preamble signal from the multiplier 617, and the MAC channel signal from the repeater 623. The adder 625 adds the voice traffic channel signal from the gain adjuster 608 and the output signal from the multiplexer 625 to form and output one I and Q channel signal. The multiplexer 626 performs time division multiplexing on the pilot channel signal from the multiplier 601 and the output signal from the adder 625. The complex spreader 627 multiplies the output signal of the multiplexer 626 by a predetermined PN code and outputs the complex spread. The filter 628 base-filters and outputs the output signal of the complex spreader 627.
    [58] The base station structure as described above is incompatible with the IS-2000 system. Here, the voice traffic information is 1.5kbps to 9.6kbps, and since the symbol rate after the QPSK modulation is 19.2kbps, 64 bits of Walsh code and PN code are spread to transmit the final chip rate to 1.2888Mbps. In the data traffic channel, the forward data throughput is lower than that of the conventional HDR method due to the transmission power and the Walsh code of the voice traffic channel. The Walsh code of the voice traffic channel and the Walsh code of the data traffic channel must use different sequences to avoid duplication of Walsh codes of the same series. In the conventional HDR method, data traffic is divided into 16 Walsh channels, but according to the exemplary embodiment of the present invention, since the voice traffic channel must be assigned a predetermined Walsh code, the data traffic channel is divided into less than 16 Walsh channels, and the remaining Walsh codes are Used for voice traffic channel with period 64. Meanwhile, the multiplexer (TDM) 624 collects and transmits a preamble and a MAC (FAB, RPC, RAB) channel through time division multiplexing on a data traffic channel. The MAC channel is transmitted at the power of the data traffic channel, FAB and RAB are transmitted to the Walsh determined as a common channel of all mobile stations, and RPC extends the Walsh of the data channel of period 16 to Walsh of period 32 to distinguish users. Is sent to a specific user. When the number of channels of the physical layer output from the multiplexer 626 is M, the number of voice traffic channels and the number of code division multiplexed data traffic channels is N, M + N physical layer channels are transmitted on the forward link.
    [59] 7 illustrates a structure of a voice traffic channel transmitter according to an embodiment of the present invention. The channel transmitter shows a channel structure according to the data rate of 1.5kbps ~ 9.6kbps. Referring to FIG. 7, the FQI insertion unit 701 inserts and outputs a frame quality indicator (hereinafter referred to as "FQI") to the input voice traffic channel data. The tail generator 702 attaches a tail bit to the output data from the FQI insertion unit 701 and outputs the tail bit. The encoder 703 encodes and outputs the output from the tail generator 702. The encoder 703 may use a turbo encoder or a convolutional encoder. The symbol repeater 704 repeatedly outputs the output code symbol from the encoder 703 a predetermined number of times. The symbol puncturer 705 punctures and outputs the output code symbol of the symbol repeater 704 by a predetermined pattern. The interleaver 706 block interleaves the output of the symbol puncturer 706 and outputs the result. For example, assuming that the number of information bits of a 20ms frame is 24 bits, 30 bits are appended with 6 bits of tail bits. If the information bits of 30 bits are encoded at a code rate of R = 1/4, 30 x 4 = 120 bits ] symbols. Here, since the repetition factor is 8, the symbol repetition results in 120 × 8 = 960 symbols. On the other hand, if the puncturing is performed every five times, since all 192 symbols are punctured, the final output frame data is 768 symbols. In other words, it matches the data rate 38.4kcps (768symbols / 20ms).
    [60] Hereinafter, a method of performing a forward power control by receiving a pilot channel and a DRC channel from a specific user will be described.
    [61] 8 illustrates a base station receiver for detecting a DRC in a backward signal from a specific user and controlling a gain of a forward voice traffic channel with reference to the detected DRC according to an embodiment of the present invention.
    [62] Referring to FIG. 8, the complex PN despreader 801 multiplies the received signal by the PN code and outputs the complex PN despread. The pilot extractor 802 extracts a pilot signal by multiplying the output from the complex PN despreader 801 by a predetermined orthogonal code. The channel estimator 803 conjugates and complexes the extracted pilot signal from the pilot extractor 802 to output a channel compensation conjugate signal. The DRC extractor 804 extracts the DRC signal by multiplying the output from the complex PN despreader 801 by a predetermined orthogonal code. The Walsh cover detector 805 detects and outputs a Walsh cover from the extracted DRC signal from the DRC extractor 804. A multiplier 806 multiplies and outputs the DRC signal from the DRC extractor 804 and the Walsh cover from the Walsh cover detector 805. The adder 807 adds the output from the multiplier 806 in Walsh code units and outputs the sum. The multiplier 808 multiplies the output from the adder 807 by the conjugate signal from the channel estimator 803 and outputs a channel compensated DRC symbol. The code word adder 809 sums the output from the multiplier 808 by a predetermined pattern and outputs the sum. The decoder 810 decodes the output from the codeword adder 809 and outputs DRC information. Here, the decoder is a (8, 4, 4) block decoder. The DRC detector 811 determines the forward data rate with reference to the mapping table with the DRC information from the decoder 810 and outputs the forward data rate. A forward power controller 812 determines and outputs a gain of a forward voice traffic channel with reference to the DRC information from the decoder 810.
    [63] FIG. 8 illustrates a mobile station measuring reception strength (Ec / I) of a forward signal from a base station, transmitting DRC information according to the reception strength to a base station, and extracting the DRC information from a base station to determine a forward data rate and power. A base station structure for performing control is described. However, the mobile station may transmit the measured reception strength (EC / I) to the base station as it is. In this case, the base station performs data rate determination and power control with the Ec / I information received from the mobile station.
    [64] FIG. 9 illustrates a control procedure for performing power control of a forward voice traffic channel using the DRC received in FIG. 8. Referring to FIG. 9, the power controller 812 converts to Ec / I using the mapping table shown in Table 3 through the DRC received in step 9-1.
    [65] Forward Data Rate (kbps)C / I [Ec / I] (dB) 38.4-14.571 76.8-11.561 102.4-10.312 153.6S-8.551 153.6L-8.841 204.8-7.302 307.2S-5.541 307.2L-5.831 614.4-2.530 921.6-1.249 1228.80.000 1843.21.761 2457.63.010
    [66] In addition, since the Ec / I is a mobile station reception Ec / I for a data channel in step 9-3, the power controller 812 converts the value to a voice channel through Equation 1 below, and the mobile station in step 9-5. In Equation 2, the transmission power of the voice traffic channel to match the reception Ec / I (VOICE_FPC_SEPT) required for call quality is obtained from Equation 2 below.
    [67]
    [68] Here, the rx_voic k _Ec / I is the reception Ec / I required by the mobile station for the voice channel, the data_Ec / I is the reception Ec / I required by the mobile station for the data channel, and pre_voic k _power is the transfer of the voice channel. Transmit power, and pre_data_power indicates the previous transmit power of the data channel.
    [69]
    [70] Here, voice _power k is the transmit power of the voice channel for the k th user, the VOICE_FPC_SEPT represents the received Ec / I which the mobile station is required to maintain the communication quality.
    [71] In operation 9-7, the power controller 812 compares the sum of the transmit power of the power control of the k-th user with the transmit power of another user's voice traffic channel and the maximum possible voice channel power (MAX_VOICE_POWER) as shown in Equation 3 below. If smaller, the updated power is converted to the channel gain by the square root of the updated power in step 9-11 and provided to the gain adjuster 808 of FIG. 6, and in step 9-9, the transmit power is transmitted as the previous power.
    [72]
    [73] An example of the process of FIG. 9 will be described below.
    [74] pre_voice k _power = 0.01, pre_data_power = 0.5, VOICE_FPC_SEPT = -14 dB,
    [75] Assuming DRC = 1228.8 kbps in current slot,
    [76] rx_voice k _Ec / I = 1/50 * exp (0.1 * 0) = 0.02,
    [77] voice k _power = 0.01 * exp (-14 * 0.1) / rx_voice k _C / I = 0.02
    [78] Assuming DRC = 614.4 kbps in the next slot,
    [79] rx_voice k _Ec / I = 0.02 / 0.5 * exp (0.1 * -2.530) = 0.02234
    [80] voice k _power = 0.02 * exp (-14 * 0.1) / rx_voice k _Ec / I = 0.03564.
    [81] FIG. 10 illustrates a control procedure for performing power control of a forward voice traffic channel using the DRC received in FIG. 8. Referring to FIG. 10, since the Ec / I received from the mobile station in step 10-1 is a reception measurement value for the transmission power of the data channel, the power controller 812 may use Ec / I for the voice channel through Equation 4 below. In step 10-3, the transmit power of the voice traffic channel to match the received Ec / I (VOICE_FPC_SEPT) required for call quality at the mobile station is obtained through Equation 2 above.
    [82]
    [83] The power controller 812 compares the sum of the power of the k-th user with the power of the other user's voice channel and the maximum possible voice channel power (MAX_VOICE_POWER) in steps 10-5, and in step 10-7. The updated power is converted into a channel gain and provided to the gain adjuster 808 of FIG. 6, and in step 10-9, the transmit power is transmitted to the previous power.
    [84] An example of the process of FIG. 10 will be described below.
    [85] pre_voice k _power = 0.01, pre_data_power = 0.5, VOICE_FPC_SEPT = -14dB
    [86] If Ec / I = 0 dB in the current slot,
    [87] rx_voice k _Ec / I = 0.01 / 0.5 * exp (0.1 * 0) = 0.02,
    [88] voice k _power = 0.01 * exp (-14 * 0.1) / rx_voice k _Ec / I = 0.02
    [89] If Ec / I = -1.2 dB in the next slot,
    [90] rx_voice k _Ec / I = 0.02 / 0.5 * exp (0.1 * -1.2) = 0.03034
    [91] voice k _power = 0.02 * exp (-14 * 0.1) / rx_voice k _Ec / I = 0.0624.
    [92] 11 illustrates a mobile station apparatus for generating C / I and differential C / I according to an embodiment of the present invention.
    [93] Referring to FIG. 11, the complex PN despreader 1101 multiplies the received signal by the PN code to output the PN despread. The pilot extractor 1102 extracts and outputs a pilot signal from the PN despread signal. The squarer 1103 and the calculator 1104 obtain the chip power using the pilot signal from the pilot extractor 1102, and average and output the power Io of all received signals in the pilot section. The calculator 1105 and the squarer 1106 obtain the power by averaging the pilot signal from the pilot extractor 1105 to obtain and output the chip power C of a desired signal. The interference calculator 1107 subtracts the power C of the desired signal from the obtained power Io of the received signal to obtain a noise interference power I. The C / I calculator 1108 calculates and outputs a signal-to-interference ratio (C / I) by dividing the power (C) of the desired signal by the obtained noise interference power (I). The converter 1112 converts and outputs C / I for the total transmit power from the C / I calculator 1108 into Ec / I for the data channel. The mapper 1113 maps the Ec / I of the measured data channel to 4Bit C / I information from Table 4 below and outputs the mapped information. The delay unit 1109 holds the signal-to-interference ratio (C / I) from the C / I calculator 1108 for one slot period and provides it to the differential C / I calculator 1110 in the next slot section. The differential C / I calculator 1110 calculates and outputs a ratio of C / I in a current slot to C / I of a previous slot. The mapper 1111 maps the 4Bit C / I information to the 4Bit C / I information with the C / I ratio.
    [94] 4 bits of C / I informationC / I [Ec / I] (Db) 0000-16.5 0001-15 0010-13.5 0011-12 0100-10.5 0101-9.0 0110-7.5 0111-6.0 0111-4.5 1000-3.0 1001-1.5 10110.0 11001.5 11013.0 11104.5 11116
    [95] 4-bit differential C / I informationDifferential C / I (dB) 0000-3.5 0001-3.0 0010-2.5 0011-2.0 0100-1.5 0101-1.0 0110-0.5 01110.0 10000.5 10011.0 10101.5 10112.0 11002.5 11013.0 11103.5 11114.0
    [96] Here, the differential C / I is considered to be 3.5 dB when the differential C / I is less than -3.5 dB, and 4.0 dB when the differential C / I is greater than 4 dB.
    [97] 12 illustrates a procedure of obtaining a DRC by a base station and a mobile station using C / I (Ec / I) according to an embodiment of the present invention. When the mobile station reports C / I (Ec / I), the mobile station does not know at what data rate the base station will transmit, so the mobile station must obtain the DRC in C / I (Ec / I) in the same way as the base station. 12, in step 12-1, the mobile station updates while reporting C / I (Ec / I), and updates when the base station receives C / I (Ec / I). In step 12-3, the mobile station (or base station) searches for a DRC corresponding to C / I (Ec / I) by referring to the mapping table as shown in Table 3 above, and updates the newly obtained DRC in step 12-3. .
    [98] FIG. 13 illustrates a mobile station apparatus in which a mobile station generates DRC 4 bits periodically and generates data differential C / I 4 bits therebetween according to an embodiment of the present invention. The mobile station apparatus is the same as the mobile station apparatus described with reference to FIG. 11, but has different information for mapping Ec / I for the measured data channel. In the case of FIG. 11, the Ec / I measured by the mapper 1113 is mapped to C / I information using the mapping table shown in Table 4, but the mapper 1313 of 13 uses the mapping table shown in Table 3 above. The measured Ec / I is mapped to 4 bit DRC information and output.
    [99] FIG. 14 illustrates a mobile station transmitting 4 bits of DRC (or Ec / I) output from the mapper 1113 or 1313 at intervals of 600 / DRC_DIFF_RESET (Hz) in accordance with an embodiment of the present invention. A transmitter for transmitting four bits of differential C / I information output from 1311 is shown. The mobile station transmitter of FIG. 14 is almost similar to the transmitter of FIG. 3, showing only differences in DRC transmission. Looking at the DRC transmission, the switch 319 is connected between the first mapper 1111 (or 1311) and the second mapper 1113 (1313) and the encoder 305, by a control signal of an upper controller (not shown), In the unit of 600 / DRC_DIFF_RESET (Hz), the DRC (or Ec / I) 4 bits output from the mapper 1113 (or 1313) are provided to the encoder 305, and the output from the mapper 1111 (or 1311) is provided therebetween. Four bits of differential C / I information are provided to the encoder 305. Operation after the encoder 305 is the same as in FIG. 3 and will be omitted.
    [100] FIG. 15 illustrates a base station receiver of FIG. 14. The base station receiver is similar to the configuration of FIG. 8, and shows a difference in that only the DRC (Ec / I) and the differential C / I are received to determine forward data rate and forward power control. The switch 813 is connected between the decoder 810, the DRC detector, and the power controller 812. The switch 813 is switched in a period of 600 / DRC_DIFF_RESET (Hz) unit under the control of the upper controller to receive the received DRC (or Ec / I) information and the differential C / I information. To the DRC detector 811 and the power controller 812. The DRC detector 811 determines the forward data rate with the DRC (or Ec / I) information n and the differential C / I information transmitted from the switch 813, and the power controller 812 determines the gain of the voice traffic channel.
    [101] FIG. 16 illustrates a procedure of controlling forward power through DRC (Ec / I) 4 bits and differential C / I 4 bits received by a base station according to an embodiment of the present invention.
    [102] Referring to FIG. 16, the power controller 812 determines whether the DRC (C / I) 4 bits are input periods in step 16-1, and when the DRC 4 bits are input, the controller 16 proceeds to step 16-11. (Or FIG. 10), otherwise proceed to step 16-3 to obtain the differential power corresponding to the differential C / I 4 bits in Table 4 above. In addition, the power controller 812 multiplies the voice channel transmission power (rx_voic k _Ec / I) estimated by the previous slot in step 16-5 by the differential power (diffk_power) according to the differential C / I information and transmits the current voice channel transmission power. Compute (rx_voic k _Ec / I). In step 16-7, the power controller 812 calculates how much the mobile station should increase compared to the transmit power of the previous slot in order to obtain the reception power Ec / I (VOICE_FPC_SEPT) required to maintain the call quality. When the power controller 812 controls the power of the k-th voice traffic channel in steps 16-9, the power controller 812 compares the power of the k-th voice traffic channel with the power of the voice traffic channel of another user and the maximum transmit power. In this case, if it is smaller than the maximum transmission power, it is determined to transmit the power of the updated voice channel in steps 16-11, and otherwise, it is determined to transmit at the previous transmission power in steps 16-13. In operation 16-15, the power controller 812 calculates a gain according to the transmission power of the determined voice channel and controls the gain of the voice traffic channel.
    [103] An example of the process of FIG. 16 will be described below.
    [104] pre_voice k _power = 0.01, VOICE_FPC_SEPT = -14 dB
    [105] Assuming diff C / I = 3.0dB in the current slot,
    [106] rx_voice k _Ec / I = 0.01 * exp (0.1 * 3) = 0.02,
    [107] voice k _power = 0.01 * exp (-14 * 0.1) / rx_voice k _Ec / I = 0.02
    [108] Assuming diff C / I =-3dB in the next slot,
    [109] rx_voice k _Ec / I = 0.02 * exp (0.1 * -3) = 0.01
    [110] It is a voice k _power = 0.02 * exp ( -14 * 0.1) / rx_voice k _Ec / I = 0.08.
    [111] FIG. 17 illustrates whether DRC (Ec / I) 4Bit is periodically transmitted and data rate is to be maintained (00), data rate is down one step (01), and data rate according to an embodiment of the present invention. A mobile station transmitter is shown that transmits 2 bits with 10 information to step up, or 2 bits of differential C / I instead of 4 bits of differential C / I used in FIG. In case of transmitting the differential C / I 2 bits, the transmitting end transmits the differential C / I using the following Table 6, and the receiving end is the same as in FIGS. 15 and 16 except that the differential C / I information is 2 bits. It works.
    [112] 2-bit differential C / I informationDifferential C / I (dB) 00-2.0 01-1.0 101.0 112.0
    [113] FIG. 18 is a diagram illustrating detecting a data rate for a data channel in a case of periodically receiving 4 bits of DRC (Ec / I) and receiving 2 bits of information on a differential DRC between them according to an embodiment of the present invention, Fig. 17 shows the corresponding base station receiver for obtaining the channel gain for. Since the switch 821 has a different DRC (Ec / I) 4 bit and a differential DRC 2 bit modulation method, the switch 821 is switched in units of 600 / DRC_DIFF_RESET (Hz) to provide each piece of information with a corresponding codeword adder before demodulation. do. Accordingly, four bits of DRC (Ec / I) information and two bits of differential DRC information are provided to the DRC detector 811 and the forward power controller 823.
    [114] FIG. 19 illustrates a procedure of controlling forward power by using the periodic DRC (C / I) 4 bits and the differential DRC 2 bits received by the base station receiver of FIG. 18 according to an embodiment of the present invention. Referring to FIG. 19, the power controller 823 determines whether it is a periodic DRC (C / I) in step 19-1 and sets slotIndex to 0 in step 19-1 if it is 4 bits of periodic DRC (C / I). 9 and 10 are performed. When the previous DRC value in hexadecimal is greater than 0xb in step 19-2, it is difficult to apply forward power control because it is a value that is not set or a long packet, and when the differential DRC 2-bit information is 00, the channel is Since there is no information on the state, it is difficult to apply the forward power. Therefore, it is checked whether the received DRC related information corresponds to the above two cases, and the process returns to step 19-1. On the other hand, the power controller 823 should maintain the data rate according to the value of the differential DRC 2 bits received in step 19-3 (00), whether to lower the data rate by one step (01) and raise the data rate by one step. 10 is determined to predict the current DRC value by the previous DRC value from Table 2, and to obtain a C / I value corresponding to the data corresponding to the predicted DRC value from Table 3. In operation 19-5, the data channel Ec / I is converted into the voice channel Ec / I. On the other hand, the power controller 823 calculates the power of the voice channel currently required by the mobile station to satisfy the power VOICE_FPC_SEPT required for the call quality of the voice channel with the power of the previous slot in steps 19-7. Then, when the power of the k-th voice channel is increased in 19-9, it is compared whether the updated power is smaller than the maximum possible voice channel power. If the transmission power of the maximum possible voice channel is greater than that, the previous transmission power is equally allocated in steps 9-13, and if smaller, the gain value of the voice traffic channel is obtained using the updated power in steps 19-15.
    [115] An example of the process of FIG. 16 will be described below.
    [116] pre_voice k _power = 0.01, data_power = 0.5, VOICE_FPC_SEPT = -14dB
    [117] pre_DRC_value = 0x9 (1228.8 kbps from Table 2)
    [118] Diff in the current slot. If DRC info = 10,
    [119] data_DRC = 0x9 + 1 = 0xa (1843.2 kbps from Table2)
    [120] data_Ec / I = 1.761 dB from Table 3,
    [121] rx_voice k _Ec / I = exp (0.1 * data_Ec / I) * pre_voice k _power / data_power = 0.03,
    [122] voice k _power = pre_voice k _power * exp (0.1 * VOICE_FPC_SEPT) / rx_voice k _Ec / I
    [123] = 0.01333
    [124] In the next slot, say diff DRC info = 01
    [125] data_DRC = 0xa-1 = 0x9 (1228.8 kbps from Table2)
    [126] data_Ec / I = 0dB from Table 3,
    [127] rx_voice k _C / I = exp (0.1 * data_Ec / I) * pre_voice k _power / data_power = 0.02667,
    [128] voice k _power = pre_voice k _power * exp (0.1 * VOICE_FPC_SEPT) / rx_voice k _Ec / I
    [129] = 0.02.
    [130] FIG. 20 periodically transmits DRC (Ec / I) 4-bit information and transmits differential DRC (C / I) 2-bit information with FIG. 17 in between, and performs differential DRC (C / I) Sending two bits and leaving two bits transmits forward power control information to illustrate the mobile station apparatus. The differential DRC (C / I) 2-bit information is repeated twice and the 2-bit forward power control information is repeated 4 times and multiplexed through the multiplexer 334. Periodic DRC (Ec / I) 4-bit information and multiplexed differential DRC (C / I) 2-bit / forward power control 2-bit are switched to multiplier 307 in units of 600 / DRC_DIFF_RESET (Hz) via switch 335.
    [131] 21 illustrates periodic DRC (C / I) 4-bit information, multiplexed differential DRC (C / I) 2-bit information and 2-bit forward power control information transmitted by a k-th user according to an embodiment of the present invention. 20 illustrates a base station receiver corresponding to FIG. 20 in which the base station determines the forward power control and the forward data rate. The switch 830 switches periodic DRC (C / I) 4-bit information, multiplexed differential DRC (C / I) 2-bit information, and 2-bit forward power control information in 600 / DRC_DIFF_RESET (Hz) units to deliver the corresponding decoder. . The differential DRC (C / I) 2-bit information is symbol summed by FACTOR = 2 and restored to the original information through Walsh demodulation. FPCB 2-bit information is obtained by symbol summation by FACTOR = 4. The DRC detector 811 detects the DRC and determines the forward data rate by receiving periodic DRC (C / I) 4-bit information and differential DRC (C / I) 2-bit. The forward power controller 835 receives forward power control 2-bit information and performs forward power control.
    [132] FIG. 22 controls forward power by using the periodic DRC (C / I) 4 bits, the multiplexed differential DRC bits and the forward power control information 2 bits received by the base station receiver of FIG. 21 according to an embodiment of the present invention. The procedure is illustrated. Referring to FIG. 22, the power controller 835 determines whether the DRC (C / I) 4-bit information is periodic in step 22-1, and sets slotIndex to '0' in step 22-7 in the case of periodic information. 9 and 10. Meanwhile, when the power controller 835 increases the slotIndex by '1' in step 22-3 and forward power control information is input in step 22-5, the power controller 835 performs transmission power of the slot according to the power control bit in the previous slot power. Obtained through the equation (5).
    [133]
    [134] In step 22-9, if the power of the k-th user is increased, it is checked whether it is smaller than the maximum possible power of the voice traffic channel, and if it is small, the process proceeds to steps 22-13 to obtain the voice channel gain. Proceed to step 11 to obtain the voice channel gain with the previous power.
    [135] An example of the process of FIG. 22 will be described below.
    [136] pre_voice k _power = 0.01, data_power = 0.5, VOICE_FPC_SEPT = -14 dB
    [137] FPCB info = 1. pc_step = 0.5 in current slot
    [138] voice k _power = exp (0.1 * 0.5 * FPCB) * pre_voice k _power = 0.01122,
    [139] In the next slot, FPCB info = -1, pc_step = 0.5
    [140] voice k _power = exp (0.1 * 0.5 * FPCB) * pre_voice k _power = 0.01
    [141] FIG. 23 illustrates a base station transmitter compatible with IS-2000 according to another embodiment of the present invention. The difference from the base station transmitter described in FIG. 6 is that the common channels (pilot channel, synchronization channel, call channel, common control channel, etc.) used in the IS-2000 are allocated by the code multiplexing method for compatibility of voice channels. The pilot symbol is assigned only to the data channel. Therefore, in the case of FIG. 6, the pilot measured by the mobile station becomes Ec / I (C / I) for the entire transmission signal, whereas in FIG. 23, the pilot pilot of the data channel and the Ec / I for the IS-2000 pilot. Can be distinguished. Accordingly, when the FIG. 23 is applied to the above-described embodiments, it may be understood that the C / I is converted into a pilot of the data channel and an IS-2000 pilot Ec / I.
    [142] 24 is a view illustrating a signal transmitted from a base station transmitter such as FIG. 23 compatible with IS-2000 in which a pilot channel is assigned to code multiplexing and distributed pilot symbols are allocated to a data channel, according to an embodiment of the present invention. A receiver for obtaining a reception power to interference ratio of a data channel is shown. The total chip reception power is obtained by extracting the distributed pilot section to obtain the power in chip units, and after despreading, the power is calculated in symbol units to obtain the pilot symbols of the data section and the pilot power of the common channel. The C / I calculator 2413 obtains and outputs a pilot symbol power to interference ratio of a data interval, and the mapper 2413 obtains and outputs DRC information with reference to the mapping table as shown in Table 3 above with the obtained pilot symbol power to interference ratio. do. The differential C / I calculator 2410 obtains the pilot signal-to-interference ratio of the previous slot and the pilot power-to-interference ratio of the current slot, and the mapper 2411 obtains and outputs 4-bit differential C / I information with reference to Table 5.
    [143] 25 is a diagram illustrating a receiver for obtaining a reception power to interference ratio of a data channel according to an exemplary embodiment of the present invention. The receiving apparatus of FIG. 25 has almost the same configuration as that of the receiving apparatus of FIG. 24, except that the mapper 2420 maps the reception power-to-interference ratio of the data channel to C / I 4-bit information.
    [144] FIG. 26 is a diagram illustrating data Ec / transmitted by a mobile station in a base station apparatus such as FIG. 23 compatible with IS-2000 in which a pilot channel is assigned to code multiplexing and distributed pilot symbols are allocated to a data channel. The procedure for controlling forward power using the 4-bit information for I is shown. The procedure of FIG. 26 is the same as FIG. 10 except that step 26-1 of obtaining power of a received voice channel is omitted in detail. Here, the power of the voice channel is calculated as in Equation 6 below.
    [145]
    [146] As described above, when the HDR standard system, which is a high speed data transmission system, is modified to a system that simultaneously supports a high speed data channel and a voice channel, forward power control is required to maintain the call quality of the voice channel. The present invention performs forward power control using the DRC used in the existing HDR system, forward power control by transmitting the differential DRC or differential C / I in the DRC section, or power control by transmitting the forward power control bit in the DRC section There are many ways to do this. That is, the present invention enables the power control of the voice traffic channel in the HDR system, thereby increasing the frequency band wastage for the voice channel which is a problem of HDR and increasing the capacity of the base station power amplifier (IS-2000 voice channel frequency band and HDR data channel frequency band) (Which must be supported at the same time).
    权利要求:
    Claims (28)
    [1" claim-type="Currently amended] A first calculator having a signal of a forward pilot channel and calculating a total signal-to-interference ratio (C / I);
    The signal-to-interference ratio (Ec / I) of the data channel is calculated using the total signal-to-interference ratio (C / I), and the first forward data rate control information corresponding to the calculated signal-to-interference ratio of the data channel is generated. The first generator,
    A delay for storing the total signal-to-interference ratio (C / I) in the previous slot,
    Calculate the differential signal-to-interference ratio according to the ratio of the total signal-to-interference ratio in the previous slot from the delay and the total signal-to-interference ratio in the current slot from the first calculator, and corresponding to the calculated differential signal-to-interference ratio A first generator for generating second forward data rate control information;
    And a channel generator which is generated by orthogonally spreading the first forward data rate control information and the second forward data rate control information.
    [2" claim-type="Currently amended] The method of claim 1,
    And the first forward data rate control information is 4-bit data rate control (DRC) information.
    [3" claim-type="Currently amended] The method of claim 1,
    And the first forward data rate control information is 4-bit carrier to interference (C / I) information.
    [4" claim-type="Currently amended] The method of claim 1,
    And the second forward data rate control information is 2-bit rate up-down (RUD) information indicating whether the data rate should be increased by one level, maintained or decreased by one level.
    [5" claim-type="Currently amended] The method of claim 1,
    And the second forward data rate control information is 2-bit differential C / I information.
    [6" claim-type="Currently amended] The method of claim 1,
    And the second forward data rate control information is 4-bit differential C / I information.
    [7" claim-type="Currently amended] The method of claim 1, wherein the channel generator,
    An output switch for switching the first and second forward data rate control information;
    An encoder for block encoding the first forward data rate control information from the switch and outputting codeword symbols;
    An iterator for repeatedly outputting the codeword symbols from the encoder a predetermined number of times;
    A first multiplier for multiplying and outputting the output of the repeater and a predetermined Walsh code;
    A Walsh cover generator for generating sector-class Walsh covers by a control signal from an upper controller;
    A second multiplier for multiplying and outputting the output from the first multiplier and the Walsh cover;
    And a multiplier for multiplying the output of the second multiplier by a predetermined Walsh code and performing orthogonal diffusion.
    [8" claim-type="Currently amended] The method of claim 1, wherein the channel generator,
    An encoder for block encoding the first forward data rate control information and outputting codeword symbols;
    A first repeater for repeatedly outputting the codeword symbols from the encoder a predetermined number of times;
    An orthogonal modulator for performing 4-ary orthogonal modulation on the second forward data rate control information to output codeword symbols;
    A second repeater for outputting the codeword symbols from the quadrature modulator a predetermined number of times;
    A switch for switching and outputting the first repeater and the second repeater;
    A Walsh cover generator for generating sector-class Walsh covers by the control signal of the host controller;
    A first multiplier for multiplying the output from the switch by a predetermined Walsh code;
    A second multiplier for multiplying and outputting the output from the first multiplier and the Walsh cover;
    And a third multiplier for multiplying the output from the second multiplier by a predetermined Walsh code and performing orthogonal diffusion.
    [9" claim-type="Currently amended] The method of claim 1, wherein the channel generator,
    An encoder for block encoding the first forward data rate control information and outputting codeword symbols;
    A first repeater for repeatedly outputting the codeword symbols from the encoder a predetermined number of times;
    An orthogonal modulator for performing 4-ary orthogonal modulation on the second forward data rate control information to output codeword symbols;
    A second repeater for repeatedly outputting the codeword symbols from the quadrature modulator a predetermined number of times;
    A third repeater for repeatedly outputting forward power control bits a predetermined number of times;
    A multiplexer for multiplexing and outputting the outputs from the second and third repeaters;
    A switch for switching outputs of the first repeater and the multiplexer;
    A Walsh cover generator for generating sector-class Walsh covers by the control signal of the controller;
    A first multiplier for multiplying the output from the switch by a predetermined Walsh code;
    A second multiplier for multiplying and outputting the output from the first multiplier and the Walsh cover;
    And a third multiplier for multiplying the output from the second multiplier by a predetermined Walsh code and performing orthogonal diffusion.
    [10" claim-type="Currently amended] A channel receiver for receiving DRC information received through a reverse DRC channel from a specific mobile station;
    A DRC detector for determining a forward data rate to provide to the specific mobile station with the DRC information from the channel receiver;
    A forward power controller which calculates a reception power for a voice channel required by the specific mobile station with the DRC information from the channel receiver, and controls a forward transmission power for the specific mobile station in consideration of the maximum possible transmission power of the voice channel. Base station apparatus comprising a.
    [11" claim-type="Currently amended] A first receiver and second forward data rate control information, which are alternately received from a specific mobile station over a reverse DRC channel at predetermined intervals, by a channel receiver;
    A DRC detector for determining a forward data rate to provide to the specific mobile station with the first and second forward data rate control information;
    Calculating received power for a voice channel requested by the specific mobile station with the first and second forward data rate control information, and controlling forward transmit power for the specific mobile station in consideration of the maximum possible transmit power of the voice channel; A base station apparatus comprising a forward power controller.
    [12" claim-type="Currently amended] The method of claim 11,
    And the first forward data rate control information is 4-bit data rate control (DRC) information.
    [13" claim-type="Currently amended] The method of claim 11,
    And the first forward data rate control information is 4-bit C / I information.
    [14" claim-type="Currently amended] The method of claim 11,
    And the second forward data rate control information is 2-bit rate up-down (RUD) information indicating whether the data rate should be increased by one level, maintained or decreased by one level.
    [15" claim-type="Currently amended] The method of claim 11,
    And the second forward data rate control information is 2-bit differential C / I information.
    [16" claim-type="Currently amended] The method of claim 11,
    And the second forward data rate control information is 4-bit differential C / I information.
    [17" claim-type="Currently amended] Receiving first and second forward data rate control information which are alternately received from a specific mobile station at predetermined intervals through a reverse DRC channel,
    Determining a forward data rate to provide to the specific mobile station with the received first and second forward data rate control information;
    The received power for the voice channel requested by the specific mobile station is calculated using the received first and second forward data rate control information, and the forward transmit power for the specific mobile station is determined in consideration of the maximum possible transmit power of the voice channel. The control method of the base station, characterized in that it comprises a process.
    [18" claim-type="Currently amended] The method of claim 17,
    And the first forward data rate control information is 4-bit data rate control (DRC) information.
    [19" claim-type="Currently amended] The method of claim 18, wherein the power control process,
    Acquiring a reception power (data_Ec / I) of a data channel requested by the specific mobile station using the DRC information when receiving the 4-bit DRC information;
    Obtaining the received power (voice k _ power) of the voice channel required by the specific mobile station with the received power of the data channel and the transmit power of the voice and data channel in the previous slot;
    Comparing the transmit power of the entire voice channel with the transmit power of the maximum possible voice channel when the obtained power of the received voice channel is applied to the specific mobile station;
    Controlling the transmit power of the voice channel assigned to the specific mobile station to provide a voice service with the received power of the obtained voice channel when the transmit power of the entire voice channel is less than the transmit power of the maximum possible voice channel. Base station reception method, characterized in that.
    [20" claim-type="Currently amended] The method of claim 19,
    The base station receiving method, characterized in that the received power of the data channel is obtained through a mapping table.
    [21" claim-type="Currently amended] The method of claim 20,
    If the transmission power of the entire voice channel is greater than the transmission power of the maximum possible voice channel, controlling the voice channel allocated to the mobile station to the transmission power of the previous voice channel. .
    [22" claim-type="Currently amended] The method of claim 17,
    And the first forward data rate control information is 4-bit C / I information.
    [23" claim-type="Currently amended] The method of claim 22, wherein the power control process,
    The voice channel required by the specific mobile station having the reception power of the data channel requested by the specific mobile station corresponding to the C / I information and the transmission power of the voice and data channel in the previous slot when the 4-bit C / I information is received. and the step of obtaining the received power (voice _power k),
    Comparing the transmit power of the entire voice channel with the transmit power of the maximum possible voice channel when the obtained power of the received voice channel is applied to the specific mobile station;
    Controlling the transmit power of the voice channel assigned to the specific mobile station to provide a voice service with the received power of the obtained voice channel when the transmit power of the entire voice channel is less than the transmit power of the maximum possible voice channel. Base station reception method, characterized in that.
    [24" claim-type="Currently amended] The method of claim 17,
    And the second forward data rate control information is 2-bit rate up-down (RUD) information indicating whether the data rate should be increased by one level, maintained or decreased by one level.
    [25" claim-type="Currently amended] The method of claim 24, wherein the power control process,
    When receiving the 2-bit rate-down information, the DRC information of the data channel requested by the specific mobile station is predicted based on the RUD information, and the received power of the data channel requested by the specific mobile station using the DRC information (data_Ec / I). Acquiring a;
    Obtaining the received power (voice k _ power) of the voice channel required by the specific mobile station with the received power of the data channel and the transmit power of the voice and data channel in the previous slot;
    Comparing the transmit power of the entire voice channel with the transmit power of the maximum possible voice channel when the obtained power of the received voice channel is applied to the specific mobile station;
    Controlling the transmit power of the voice channel assigned to the specific mobile station to provide a voice service with the received power of the obtained voice channel when the transmit power of the entire voice channel is less than the transmit power of the maximum possible voice channel. Base station reception method, characterized in that.
    [26" claim-type="Currently amended] The method of claim 17,
    And the second forward data rate control information is 2-bit differential C / I information.
    [27" claim-type="Currently amended] The method of claim 17,
    And the second forward data rate control information is 4-bit differential C / I information.
    [28" claim-type="Currently amended] The method of claim 27, wherein the power control process,
    Acquiring a differential receive power (diff k _ power) of a data channel required by the specific mobile station by using the differential C / I information when receiving the 4-bit differential C / I information;
    And the step has a transmit power of the voice channel in the differential reception power and the previous slot to obtain the received power (k _power voice) of voice channels required by the particular mobile station,
    Comparing the transmit power of the entire voice channel with the transmit power of the maximum possible voice channel when the obtained power of the received voice channel is applied to the specific mobile station;
    Controlling the transmit power of the voice channel assigned to the specific mobile station to provide a voice service with the received power of the obtained voice channel when the transmit power of the entire voice channel is less than the transmit power of the maximum possible voice channel. Base station reception method, characterized in that.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2000-07-05|Application filed by 윤종용, 삼성전자 주식회사
    2000-07-05|Priority to KR1020000038346A
    2002-01-16|Publication of KR20020004452A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020000038346A|KR20020004452A|2000-07-05|2000-07-05|Apparatus and method for controlling forward power to support voice service and fast data service in mobile communication system|
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