WO2001061901A1

WO2001061901A1 - Cdma data transmitting apparatus and cdma data transmitting method

Info

Publication number: WO2001061901A1
Application number: PCT/JP2001/001057
Authority: WO
Inventors: Takaaki Sato
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2000-02-17
Filing date: 2001-02-15
Publication date: 2001-08-23
Also published as: AU3229401A; JP2001230756A

Abstract

A compression mode timing establishment unit (115) receives, from an apparatus upper than a base station, such as an exchange, information about the timing at which to execute the compression mode of physical channels, and outputs to a compression mode timing control unit (105) a switch signal for commanding that the transmission be effected in the compression mode or in the normal mode, in accordance with the timing information. The compression mode timing control unit (105) outputs the transmission mode command outputted by the compression mode timing establishment unit(115) to a switch (104), a compression frame control unit (109) and to a transmission power control unit (113) at a frequency outputted by an interleave frequency establishment unit (102). The switch (104) is operated, according to the mode in which to transmit downstream data, to apply the data to a convolutional encoding unit (107) or another convolutional encoding unit (110).

Description

Specification

CDMA data transmission device and CDMA data transmission method

Technical field

The present invention relates to a CDMA data transmission apparatus and a CDMA data transmission method, and more particularly to a CDMA data transmission apparatus and a CDMA data transmission method for performing wireless communication in a compressed mode in a mobile communication system.

Background art

In the third-generation mobile communication system, the code division multiple access (CDMA) method will be adopted as the wireless access method. Generally, in the CDMA system, a radio signal (downlink) transmitted by a radio base station uses a spreading code unique to each cell covered by the base station, and a radio signal (uplink) transmitted by a mobile station is: A spreading code unique to each mobile station is used.

In addition, the CDMA method takes advantage of the fact that the same frequency can be used between adjacent cells, and when a mobile station moves from one cell to another, the base station of the source cell and the base station of the destination cell Soft handover that synthesizes the radio signals from and can be performed.

When performing a handover, the mobile station performs a peripheral cell * search to find the base station of the target cell. Each base station constantly transmits a radio channel called a perch channel, and the mobile station receives a signal of the perch channel and performs a cell search. The perch channel signal is transmitted using a unique spreading code in each cell.

Therefore, each base station notifies the mobile station of the spreading code used in the cell surrounding the own station as broadcast information, and the mobile station communicates with the wireless channel (periphery) using the notified spreading code. By periodically measuring the line quality (received SIR or received Eb / ΙΟ) of the perch channel of the cell and notifying the network of this measurement result (peripheral cell, search), the network can determine which cell the mobile station It can be determined whether the user is moving to.

Hereinafter, the neighboring cell search will be described.

FIG. 1 is a diagram showing a configuration of a mobile communication system. In FIG. 1, it is assumed that the mobile station 11 is communicating at the frequency f 1 of the first mobile communication system 12. In this case, even if the base station 13 of the first mobile communication system 12 is operating at a frequency f2 different from f1, the mobile station 11 must suspend the current radio transmission and reception. For example, the f2 cannot be detected by the peripheral cell search.

In addition, the mobile station 11 is a dual mode terminal having a communication function with the second mobile communication system 14 in addition to a communication function with the first mobile communication system 12, and Similarly, when roaming from the communication system 12 to the second mobile communication system 14, the presence of the base station 15 cannot be detected without interrupting the current wireless communication.

In order for a mobile station to receive signals of a plurality of frequencies simultaneously, it is necessary to prepare a plurality of receiving circuits, which increases the equipment size of the mobile station.

In order to solve these problems, the 3rd Generation Partnership Project (3GPP), which proposes a third-generation mobile communication system, is studying a compression mode that temporarily suspends transmission and reception in the wireless section. (TS 25.212 "4.4 Coding of compression mode").

As a data transmission apparatus and a data transmission method to which the CDMA method is applied to solve this problem, there is one disclosed in Japanese Patent Application Laid-Open No. Hei 11-88945. Hereinafter, the compression mode will be described. FIG. 2 is a block diagram showing a configuration of a transmission device of a base station in a mobile communication system to which the conventional CDMA method is applied.

The base station 20 in FIG. 2 includes first to N-th data transmitting units 21-1 to 21-n, It is mainly composed of an overnight multiplexing section 22, a radio transmission section 23, an antenna 24, and a control section 25.

1st to Nth data transmission unit 2 1—:! To 21 n generate a downlink transmission signal and output it to the data multiplexing unit 22. The data multiplexing unit 22 multiplexes the signals output from the data transmitting units 2 1 1 1 to 2 1 -n and outputs the multiplexed signals to the wireless transmitting unit 23. Radio transmitting section 23 performs radio processing on the signal multiplexed in data multiplexing section 22, and transmits the signal via antenna 24. The control unit 25 includes the first to Nth data transmission units 2 1— :! 2 to n, the data multiplexing unit 22 and the wireless transmission unit 23 are controlled.

In addition, Fig. 3 shows the configuration of the data transmission units 21_1 to 21-n, and its explanation is given. FIG. 3 is a block diagram showing the internal configuration of the data transmission units 21_1 to 21_n.

Data transmission unit 2 1—;! 22l_n is a configuration for realizing the compressed mode, and switches between normal mode wireless transmission and compressed mode wireless transmission. Here, a case where convolutional coding is applied to the coding process as a conventional technique will be described. In addition, turbo coding can be applied to the coding process. Data transmission unit 2 1— :! To 21-n are respectively a transmission data generation unit 31, an in-leave cycle setting unit 32, a data transmission cycle control unit 33, a switch 34, a compression mode timing control unit 35, A convolutional encoder 37, an interleave processor 38, a compressed frame controller 39, a convolutional encoder 40, an interleave processor 41, and a physical channel mapping unit 42. It mainly comprises a transmission power controller 43 and a spreading processor 44.

The transmission data generation unit 31 generates downlink transmission data and outputs it to the data transmission cycle control unit 33.

The interleave cycle setting unit 32 sets the interleave cycle and outputs it to the data transmission cycle control unit 33. The data transmission cycle control unit 33 controls the data transmission timing according to the interleave cycle set by the interleave cycle setting unit 32, and sends the downlink transmission data generated by the transmission data generation unit 31 to the switch 34. Output.

The switch 34 switches according to the mode for transmitting the downlink transmission data output from the data transmission cycle controller 33, and outputs the data to the convolutional encoder 37 or the convolutional encoder 40.

In the case of the normal mode, the switch 34 outputs the downlink transmission data to the convolutional encoder 37, and in the case of the compression mode, the switch 34 outputs the downlink transmission data to the convolutional encoder 40.

Here, the normal mode is a mode in which transmission data is encoded at an encoding rate of 1/3 and transmitted.In the compression mode, transmission data is encoded at an encoding rate of 1Z2 and transmitted. In this mode, the transmission power is set to “0”.

The compression mode timing control section 35 sends a switching signal between the normal mode and the compression mode to the switch 34, the compression frame control section 39, and the transmission power control section 43 at the cycle output from the interleave cycle setting section 32. Output.

The convolutional encoder 37 performs the compression mode encoding. Specifically, convolutional coding section 37 performs error correction coding at a coding rate of 1 Z2 on the downlink transmission data output from switch 34 and outputs the result to in-leave processing section 38. . It should be noted that the coding process at the coding rate of 1Z2 may be performed by puncturing the data after the coding process at the coding rate of 1/3 to obtain the coding rate of 1Z2.

The interleave processing unit 38 performs an interleaving process on the downstream transmission data encoded by the convolution encoding unit 37 and outputs the data to the compressed frame control unit 39. In accordance with the instruction from the compression mode timing control section 35, the compressed frame control section 39 generates a compressed frame including a gap section where the transmission power becomes “0” and outputs the generated compressed frame to the physical channel mapping section 42.

The convolutional encoder 40 performs normal mode encoding. Specifically, convolution The only coding unit 40 performs error correction coding at a coding rate of 13 on the downlink transmission data output from the switch 34 and outputs the data to the in-leave processing unit 41.

The in-leave processing unit 41 performs an interleaving process on the downstream transmission data encoded in the convolution encoding unit 40, and outputs the data to the physical channel mapping unit 42.

Physical channel mapping section 42 maps the signal output from compressed frame control section 39 or in-leave processing section 41 to a physical channel and outputs the signal to transmission power control section 43.

The transmission power control unit 43 controls the transmission power value in the normal mode and the compression mode and outputs the value to the spreading processing unit 44. Spreading section 44 spreads the output signal from transmission power control section 43 with a spreading code and outputs the spread signal.

Hereinafter, the operation of the conventional transmitting apparatus will be described. FIG. 4 is a diagram showing a configuration of a frame of a plurality of channels. In FIG. 4, the radio frame period RF is set to 1 O ms, and T—int = 4 O ms is described as an example.

In FIG. 4, for the physical channel C H # 1, the frame number at which transmission in the compressed mode is started is a frame number whose remainder when divided by a predetermined cycle “n” is “0”. As a result, in physical channel CH # 1, compression mode Ml is applied to frames with frame numbers from "0" to "3", and normal mode M2 is applied with frame numbers from "4" to "n". To send a signal.

Similarly, for the physical channel C H # 2, the frame number at which transmission in the compressed mode is started is a frame number for which the remainder when divided by a predetermined period “n” is “0”. As a result, on physical channel CH # 2, compression mode Ml is applied to frames with frame numbers from "0" to "3", and normal mode M2 is applied from frame numbers "4" to "n". Send a signal.

The data sequence to be transmitted on the downlink is generated by the transmission data generation unit 31 and is set by the interleave cycle setting unit 32 in the data transmission cycle control unit 33. It is output to the switch 34 at the in-leave period T-int.

The output signal from the data transmission cycle control section 33 is output to the normal mode side or the compression mode side by the switch 34 switched according to the switching signal output from the compression mode timing control section 35.

The output timing of the switching signal is synchronized with the interleave cycle T-int specified by the interleave cycle setting unit 32.

When the instruction from the compression mode timing control section 35 is the normal mode M2, the output signal (S bit) of the data transmission cycle control section 33 is input to the convolutional coding section 40, where the coding rate 1 No. 3 convolutional coding is performed, and 3 bits of SX are input to the in-leave processing unit 41.

In-leave processing section 41 performs in-leave processing on the input bit string and outputs the result to physical channel mapping section 42.

When the instruction from the compression mode timing control section 35 is the compression mode Ml, the output signal (S bit) of the data transmission cycle control section 33 is input to the convolutional coding section 37, where the coding rate 1 2 convolutional coding is performed, and 2 bits of SX are input to the in-leave processing unit 38.

The in-leave processing section 38 performs in-leave processing on the input bit sequence and outputs the result to the compressed frame control section 39.

The compression frame control unit 39 inserts a gap G for interrupting transmission in the radio frame RF at a predetermined position within T−int = 40 ms. Here, as an example, a case will be described in which the first frame of T—int = 40 ms is controlled to be a radio frame with a gap G (hereinafter, referred to as a compressed frame).

The physical channel mapping unit 42 maps a signal from the in-leaving processing unit 41 or the compressed frame control unit 39 on a physical channel in the normal mode. Especially in the case of a compression frame, the gap G position where transmission is interrupted is Are output to the transmission power control unit 43 by distinguishing them with different codes.

The transmission power controller 43 controls the transmission power to be higher than that in the normal mode in order to improve the characteristics such as the bit error rate due to changing the coding rate to 1/2 in the compression mode. Output to the diffusion processing unit 44.

Spreading section 44 spreads the output signal from transmission power control section 43 with the set spreading code and outputs the spread signal.

However, in the conventional apparatus, the timing when a plurality of physical channels enter the compressed mode may coincide with the timing when the transmission power is increased. In this case, the data transmission section 2 1— :! If the compressed mode processing timings of the corresponding physical channels CH # 1 and CH # 2 overlap, there is no means for avoiding the overlap. For example, frame 0 in FIG. As shown in (3) and (n) to (n + 3), the transmission period of the radio frame during the compressed mode processing having a large transmission power overlaps, so that the transmission power increases. As a result, there is a problem that interference power for other channels is temporarily increased. Disclosure of the invention

An object of the present invention is to provide a data transmission apparatus and a data transmission method to which the CDMA method is applied, which can execute the compression mode processing for each physical channel without overlapping, thereby reducing transmission power. To provide.

The purpose of this is to provide a means for setting the timing for executing the compression mode processing for each physical channel, and to determine the compression mode timing independently for each channel and to set different timings according to the instruction of the host device. This is achieved by transmitting signals from multiple channels.

BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is a diagram showing a configuration of a mobile communication system,

FIG. 2 is a block diagram showing a configuration of a transmitting device of a base station in a mobile communication system to which a conventional CDMA system is applied.

FIG. 3 is a block diagram showing the internal configuration of the data transmission unit,

FIG. 4 is a block diagram showing a configuration of a data transmission device to which a CDMA method according to Embodiment 1 of the present invention is applied,

FIG. 5 is a block diagram showing a configuration of a data transmission device to which the CDMA method according to Embodiment 1 of the present invention is applied,

FIG. 6 is a diagram showing an example of a frame of a transmission signal,

FIG. 7 is a block diagram showing a configuration of a data transmitting apparatus according to Embodiment 2 of the present invention, and

FIG. 8 is a diagram illustrating an example of a frame in the compression mode. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)

FIG. 5 is a block diagram showing a configuration of a data transmission device to which the CDMA system according to Embodiment 1 of the present invention is applied.

In FIG. 5, a data transmission device 100 includes a transmission data generation unit 101, an intermittent period setting unit 102, a data transmission period control unit 103, a switch 104, and a compression unit. A mode setting unit 105, a convolution coding unit 107, an in-leave processing unit 108, a compressed frame control unit 109, a convolution coding unit 110, It mainly includes a leave processing unit 111, a physical channel mapping unit 112, a transmission power control unit 113, a spreading processing unit 114, and a compression mode timing setting unit 115.

The transmission data generator 101 generates downlink transmission data and controls the data transmission cycle. Output to section 103. Also, the interleave cycle setting unit 102 sets the interleave cycle, and sets a data transmission cycle control unit 103, a compression mode timing control unit 105, an interleave processing unit 108, and an interleave processing unit. Output to leave processing unit 1 1 1 The data transmission cycle control unit 103 outputs the downlink transmission data to the switch 104 at the data transmission timing determined from the in-leave cycle.

Switch 104 switches in accordance with the mode for transmitting downlink transmission data, and outputs it to convolutional encoder 107 or convolutional encoder 110. Here, the transmission mode is instructed by a compression mode evening control unit 105 described later.

When the transmission mode is the normal mode, the switch 104 outputs the downlink transmission data to the convolutional encoder 107, and when the transmission mode is the compression mode, the switch 104 transmits the downlink transmission data. Output to convolutional encoder 110.

Here, the normal mode indicates a mode in which transmission data is encoded at a coding rate of 1/3 and transmitted. In the compression mode, transmission data is encoded at a coding rate of 1 to 2 and transmitted to transmit power. This shows the mode in which time is set to “0”.

The compression mode timing setting unit 115 receives the information on the timing of executing the compression mode of each physical channel from a device higher than the base station such as the switching center, and performs switching to transmit in the compression mode or the normal mode. The signal is output to the compression mode timing controller 105 according to the timing information.

The compression mode evening control section 105 sends the transmission mode instruction output from the compression mode evening setting section 115 to the switch 104, at the cycle output from the in-leave cycle setting section 102. Output to the compressed frame control unit 109 and the transmission power control unit 113.

The convolutional encoder 107 performs encoding in the compressed mode. Specifically, convolutional coding section 107 performs error correction coding at coding rate 1Z2 on the downlink transmission data, and outputs the result to in-leave processing section 108. Note that the convolutional encoder 1 0 In the case of 7, the data after the coding process at the coding rate 13 is punctured, so that the coding process at the coding rate 1Z2 can be performed.

The interleave processing unit 108 performs interleave processing on the encoded downlink transmission data, and outputs the result to the compressed frame control unit 109.

The compressed frame control unit 109 generates a compressed frame including a gap section in which the transmission power becomes “0” from the frame portion in the compressed mode of the downlink transmission signal in accordance with an instruction from the compressed mode timing control unit 105. Output to the physical channel mapping unit 112.

The convolution encoding unit 110 performs encoding in the normal mode. Specifically, convolutional coding section 110 performs error correction coding of coding rate 13 on downlink transmission data, and outputs the result to in-leave processing section 111.

The interleave processing unit 111 performs an interleave process on the encoded downlink transmission data, and outputs the result to the physical channel mapping unit 112.

Physical channel mapping section 112 maps transmission data output from compressed frame control section 109 or interleave processing section 111 onto a physical channel, and outputs the result to transmission power control section 113. In particular, in a frame in the compressed mode, the position of the gap G at which transmission is interrupted is distinguished by a code different from other transmission data. The transmission power control section 113 controls the transmission power value of the transmission data in the normal mode and the compression mode and outputs the transmission data to the spreading processing section 114. For example, the transmission power control unit 113 amplifies the transmission power of the frame in the compressed mode to be larger than the transmission power of the frame in the normal mode, and outputs the amplified power to the spreading processing unit 114. As a result, characteristics such as a bit error rate of a frame having a low coding rate can be improved. Spreading processing section 114 spreads the output signal from transmission power control section 113 with a spreading code and outputs the spread signal.

The communication apparatus includes a data transmission apparatus 100 for each channel, and sets a signal to a compression mode at different timings and transmits the signal. Data transmission device for each channel 1 A value of 0 puts the signal in compressed mode at different times and transmits it.

Next, the operation of the data transmitting apparatus 100 having the above configuration will be described. First, the switching station notifies each base station of timing information for executing the compression mode of each physical channel. This timing information is scheduled so that the timings at which the physical channels execute the compression mode do not overlap.

For example, the exchange stores a plurality of combinations of physical channel and compressed mode timing, obtains timing information from this pattern, and notifies each base station.

The base station apparatus obtains information on the timing at which the physical channel of the base station executes the compressed mode, and switches between the compressed mode and the normal mode to execute.

The compression mode timing setting unit 115 receives timing information for executing the compression mode of each physical channel from a device located above the base station such as an exchange, and converts each transmission data in the compression mode or according to the evening information. The switching signal, which is an instruction to be transmitted in the normal mode, is output to the compression mode evening controller 105.

Therefore, the refresh timing control unit 105 determines the position of the gap in the frame in the compression mode based on the timing signal output from the outside. The switching signal is output from the compression mode timing setting section 115 to the switch 104 at a timing synchronized with the in-leave cycle specified by the in-leave cycle setting section 102.

On the other hand, the downlink transmission data is generated in the transmission data generation unit 101, and in the data transmission cycle control unit 103, every one of the in-leave periods T-intt set in the in-leave cycle setting unit 102. Is output to switch 104.

When the switching signal indicates the compression mode, the downlink transmission data is output to the convolutional encoder 107 via the switch 4. When the switching signal indicates the normal mode, the downlink transmission data is transmitted via the switch 4 to the convolutional encoder 1 1 0 Is output to

When the downlink transmission data is transmitted in the normal mode, the downlink transmission data is convolutionally coded at a coding rate of 1 to 3 in the convolutional encoder 110, and is transmitted in the in-leave processor 111. Leave processing is performed.

For example, when the S. bit signal is output from the data transmission cycle control unit 103, the convolutional encoding unit 110 performs convolutional encoding at an encoding rate of 1 to 3, and the SX 3-bit signal is output. Output to the in-leave processing unit.

Also, when transmitting downlink transmission data in the compressed mode, the downlink transmission data is subjected to convolutional encoding at an encoding rate of 1 Z2 in the convolutional encoding unit 107, and the interleave processing unit. In 108, an in-leave process is performed, and a gap for interrupting transmission is inserted in the compressed frame control unit 109. For example, when an S-bit signal is output from the data transmission cycle control unit 103, the convolutional coding unit 107 performs convolutional coding at a coding rate of 1 Z2, and outputs 2 bits of SX. The signal is output to the evening leave processing unit 108.

The downlink transmission signal output from the interleave processing unit 111 or the compressed frame control unit 109 is mapped onto a physical channel in the physical channel mapping unit 112 and output to the transmission power control unit 113. You. Especially in the case of a compressed frame, the gap G position where transmission is interrupted is distinguished by a code different from other transmission data.

The downlink transmission data is amplified by the transmission power control unit 113 so that the transmission power of the frame whose coding rate has been changed to 1Z2 in the compressed mode is larger than the transmission power of the frame in the normal mode, and the spreading processing unit 114 Is output to As a result, characteristics such as a bit error rate of a frame having a low coding rate can be improved.

Then, the downlink transmission signal is spread by the spreading code set in spreading processing section 114.

Downlink transmission signals transmitted on each physical channel are multiplexed and converted into radio signals Sent from the base station. The communication terminal receives a known signal transmitted from a nearby base station using a gap of a signal transmitted based on the schedule information transmitted from the base station, measures reception quality, and performs a cell search.

Hereinafter, the frame configuration of the signal transmitted from the base station will be described. FIG. 6 is a diagram illustrating an example of a frame of a transmission signal.

Here, as an example, a case will be described in which the number of frames transmitted in the compressed mode is four per predetermined cycle. Also, a radio frame (hereinafter, referred to as a compressed frame) period R F is set to 10 ms, and T—int = 40 ms as an example.

The compression mode timing setting unit 115 sets the transmission timing in the compression mode so that the timings of the compression modes of a plurality of physical channels do not overlap.

For example, for the physical channel CH # 1, the frame number at which the transmission in the compressed mode is started is a frame number for which the remainder when divided by a predetermined cycle "n" is "0". As a result, for physical channel CH # 1, compression mode M1 is applied to frames with frame numbers "0" to "3", and normal mode M2 is applied to frame numbers "4" to "n". To send a signal.

Further, for the physical channel C H # 2, the frame number at which transmission in the compressed mode is started is set to a frame number whose remainder when divided by a predetermined cycle “n” is “4”. As a result, in the physical channel CH # 2, the compression mode M1 is applied to the frames with the frame numbers “4” and “7”, and the normal mode M from the frame numbers “8” to “n + 3”. Apply 2 and send the signal.

As described above, according to the data transmitting apparatus of the present embodiment, the timing of the compression mode is independently determined for each channel according to the instruction of the higher-level apparatus, and different timings are set to transmit signals from a plurality of channels. This prevents multiple channels from entering the compressed mode at the same time, and prevents sudden increases in transmission power. It is possible to prevent interference with other communications from increasing.

For example, according to the data transmitting apparatus 100 of the present embodiment, the compressed mode evening setting unit 1 15 sets the execution cycle of compressed mode processing = n frames to each physical channel CH # 1 and CH # By setting them independently for each channel 2, it is possible to avoid duplication of the compressed mode M1 section where the transmission power is larger than the transmission power value in the normal mode M2 on each physical channel CH # 1 and CH # 2. As a result, transmission power after multiplexing a plurality of channels can be reduced.

In the present embodiment, the normal mode indicates a mode in which transmission data is encoded at an encoding rate of 1 Z3 and transmitted. In the compressed mode, transmission data is encoded at an encoding rate of 1/2 and transmitted. A mode in which the transmission power is set to “0” is shown and described, but the present invention is not limited to this, and the coding rate is not particularly limited.

Further, in the present embodiment, the case where the number of physical channels is 2 or 3 is described, but the number of channels is not particularly limited. Further, the number of frames in the compression mode, the number of frames in the normal mode, the cycle in the compression mode, and the like are not particularly limited.

(Embodiment 2)

FIG. 7 is a block diagram showing the configuration of the data transmission device according to Embodiment 2 of the present invention. However, components having the same configuration as in FIG. 5 are denoted by the same reference numerals as in FIG. 5, and detailed description is omitted.

The data transmitting apparatus 300 of FIG. 7 includes a compressed frame position setting unit 301, a compressed frame timing control unit 302, and a compressed frame control unit 303, and is configured in a compression mode. The difference from the data transmission apparatus of FIG. 5 is that the position where the transmission power is “0” in each frame, that is, the gap position is set to a different position for each physical channel.

The compression mode evening control section 105 outputs the transmission mode instruction output from the compression mode timing setting section 115 from the in-leave cycle setting section 102. It outputs to the switch 104, the compressed frame timing control unit 302, and the transmission power control unit 113 at the set cycle.

The compression frame position setting unit 301 sets the position of the compression frame in the compression mode for each physical channel.

The compressed frame position setting unit 301 receives information on the frame arrangement in the compressed mode of each physical channel from a device located above the base station such as an exchange, and sets a gap for setting the transmission power to “0” in the compressed mode. And the position information of the compressed frame is output to the compressed frame timing control section 302.

When an instruction to transmit a signal in the compressed mode is output from the compressed mode timing control section 105, the compressed frame timing control section 302 transmits the information regarding the frame arrangement output from the compressed frame position setting section 310 to the compressed frame timing control section 302. Based on the information, the compressed frame control unit 303 is instructed to generate the gap and the compressed frame.

The compressed frame control unit 303 generates a compressed frame by arranging a gap section and a compressed frame where radio transmission is interrupted at the timing indicated by the compressed frame timing control unit 302, and generates a physical channel mapping unit. Output to 1 1 2 Next, the operation of the data transmitting apparatus 300 having the above configuration will be described. First, the switching station notifies each base station of timing information for executing the compression mode of each physical channel and arrangement information of the gap of the compressed frame. The timing information and the compressed frame are scheduled so that the positions of the gaps in the physical channels do not overlap.

For example, the exchange stores a plurality of combination patterns in which the gaps of the compressed frames in each physical channel are arranged, obtains the arrangement information of the gaps of the compressed frames from this pattern, and notifies each base station.

The compressed mode timing setting unit 1 15 is a device that is higher than the base station such as an exchange. Receives the information on the timing of executing the compression mode of each physical channel, and outputs a switching signal for instructing to transmit each transmission data in the compression mode or the normal mode according to the timing information to the compression mode setting controller 105. I do.

The switching signal is output from the compression mode timing setting section 115 to the switch 104 at a timing synchronized with the in-leave cycle specified by the in-leave cycle setting section 102.

On the other hand, the downlink transmission data is generated by the transmission data generation unit 101, and the data transmission period control unit 103 sets the transmission period T_ set by the transmission period setting unit 102. Output to switch 104 every int.

The downlink data signal is transmitted every in-leave period.

When the switching signal indicates the compression mode, the downlink transmission data is output to the convolutional encoder 107 via the switch 4. When the switching signal indicates the normal mode, the downlink transmission data is output to the convolutional encoder 110 via the switch 4.

When the downlink transmission data is transmitted in the normal mode, the downlink transmission data is convolutionally coded at a coding rate of 13 in the convolutional encoding unit 110, and is encoded in the in-leave processing unit 111. It is processed.

For example, when an S-bit signal is output from the data transmission cycle control unit 103, the convolutional encoding unit 110 performs convolutional encoding at an encoding rate of 13, and the SX 3-bit signal is input. It is output to the evening leave processing unit.

Also, when transmitting downlink transmission data in the compressed mode, the downlink transmission data is convolutionally coded at a coding rate of 1 Z2 in the convolutional encoding unit 107 during downlink transmission data. The evening-leave processing unit 108 performs an interleave process, and the compressed-frame control unit 109 inserts a gap for interrupting transmission. The downlink transmission signal output from the in-leave processing unit 111 or the compressed frame control unit 109 is placed on the physical channel by the physical channel mapping unit 112. It is mapped and output to transmission power control section 113.

Downlink transmission signals transmitted on each physical channel are multiplexed and transmitted as radio signals from the base station. The communication terminal receives a known signal transmitted from a nearby base station using a gap of a signal transmitted based on the schedule information transmitted from the base station, measures reception quality, and performs a cell search.

The operation of the overnight transmission device 300 having such a configuration will be described with reference to a timing chart shown in FIG.

FIG. 8 is a diagram illustrating an example of a frame in the compression mode.

FIG. 8 shows the physical channel CH # 1 when the control timing of each physical channel CH # 1 and CH # 2 is (frame number modn) = 0 and the control cycle = n radio frames in the compressed mode processing described later. 9 shows a transmission pattern of the physical channel CH # 2.

However, description of the same operation points as those of the data transmitting apparatus 100 of the first embodiment shown in FIG. 6 will be omitted.

The compressed frame position setting unit 301 sets the position of the compressed frame in the compression mode M1. For example, it is assumed that a frame position = 0 is set in the physical channel C H # 1, and a frame position = 1 is set in the physical channel C H # 2.

After this setting, when the compression frame timing control unit 302 receives an instruction to start the compression mode from the compression mode evening control unit 105, the compression frame timing control unit 302 compresses the position specified by the compression frame position setting unit 301. Taimin instructs to make a frame Output to the compressed frame control unit 109.

Upon receiving the timing signal, the compressed frame control unit 109 inserts a gap G1 at the physical channel CH # 1 frame position = 0 and a gap G2 at the physical channel CH # 2 frame position = 1. I do.

As described above, according to the data transmitting apparatus 300 of the second embodiment, the compressed frame position setting unit 301 sets the position of the compressed frame in the compression mode for each physical channel, and controls the compressed frame timing. The unit 302 outputs a timing signal for instructing the setting position to be a compressed frame to the compressed frame control unit 109, and the compressed frame control unit 109 transmits the radio signal at the instructed timing. G1 and G2 are used to generate compressed frames in which gap sections for interrupting are inserted as shown by G1 and G2, so that the compression mode sections Ml of multiple physical channels CH # 1 and CH # 2 overlap. Even in the case of the compression mode section M1, since the gap positions of the physical channels CH # 1 and CH # 2 in the compression mode section M1 can be dispersed as shown by G1 and G2, the multiple channels in the compression mode section M1 can be dispersed. It is possible to reduce the transmission power value after channel multiplexing.

The data transmitting apparatuses 100 and 300 of Embodiments 1 and 2 described above can also be applied to a method of increasing the CDMA symbol rate by changing the spreading factor as a compression mode. The present invention is also applicable to mobile station devices. As is apparent from the above description, according to the CDMA data transmitting apparatus and the CDMA data transmitting method of the present invention, the provision of the means for setting the timing for executing the compression mode processing for each physical channel is provided. In addition, the compression mode processing for each physical channel can be executed so as not to overlap, thereby reducing transmission power.

This description is based on Japanese Patent Application No. 2000-39547, filed on Feb. 17, 2000. This content is included here.

Claims

The scope of the claims

1. In a wireless communication to which the compression mode is applied, a compression mode timing control means for instructing a transmission timing in the compression mode in which the data transmission by each communication channel is interrupted for a fixed section, and a timing according to the instruction for each channel. CDMA data transmission comprising: compressed mode transmission means for transmitting data, in compressed mode.

2. The compressed mode timing control means communicates in the compressed mode for each channel, instructs the position of the gap section in which transmission in the compressed frame is interrupted, and the compressed mode transmission means configures the compressed frame according to the instruction. The CDMA data transmission device according to claim 1.

3. The CDMA data transmission apparatus according to claim 1, wherein the compression mode timing control means instructs transmission in a compression mode in which data transmission for each communication channel is interrupted for a fixed section according to an instruction from a higher-level protocol. .

4. The compressed mode timing control means determines that the frame number of the compressed mode in each channel is different for each channel, and the first frame number of the compressed mode is an arbitrary number of frames to be compressed in one compression mode. 2. The CDMA data transmitting apparatus according to claim 1, wherein the CDMA data transmitting apparatus indicates a timing to be a multiple.

5. A base station device including a CDMA data transmission device, wherein the CDMA data transmission device is a compression mode for interrupting data transmission by a communication channel for a certain section in wireless communication to which the compression mode is applied. And a compression mode transmitting means for transmitting data in a compressed mode in accordance with the instruction timing for each channel.

6. A mobile station device including a CDMA data transmission device, wherein the CDMA data transmission device transmits data in a compressed mode in which data transmission by each communication channel is interrupted for a certain section in wireless communication to which the compressed mode is applied. Compression mode timing control means for instructing the timing to perform, and the timing of the instruction for each channel. Therefore, it comprises compression mode transmission means for transmitting data in the compression mode.

7. In the wireless communication to which the compression mode is applied, instruct the transmission timing in the compression mode in which the data transmission by each communication channel is interrupted for a certain section, and transmit the data in the compression mode in accordance with the instruction timing for each channel. MA de—Evening transmission method.