TWI383608B - Radio communication system, base station apparatus, terminal apparatus, and radio communication method in radio communication system - Google Patents

Description

Wireless communication system, base station device, terminal device, and wireless communication method of wireless communication system Field of invention

The present invention relates to a wireless communication method for a wireless communication system, a base station device, a terminal device, and a wireless communication system.

Background of the invention

In the LTE-A (LTE-Advanced) system, wireless communication of CoMP (Coordint ae MultiPoint access) is reviewed (for example, Non-Patent Documents 1 and 2 below).

When the CoMP is located in an area that can communicate with a plurality of base stations (or sectors), each base station uses MIMO (Multiple Input Multiple Output) to transmit different data to the terminal. On the other hand, in a wireless communication system such as LTE, the base station performs a disturbance process on the transmission data (for example, Non-Patent Documents 3 and 4 below). For example, the base station adds the transmitted data b(0),...,b(M _bit -1) and the scrambling code c(i), and calculates the remainder of the "2" (Modulo) to perform the scrambling. which is,

Here, the scrambling code c(i) is a Kelvin code of length "31", and is obtained by the following generator polynomial.

[Number 2]

c ( n )=( x ₁ ( n + N _C )+ x ₂ ( n + N _C )) mod2

[Number 3]

x ₁ ( n +31)=( x ₁ ( n +3)+ x ₁ ( n )) mod2

[Number 4]

x ₂ ( n +31)=( x ₂ ( n +3)+ x ₂ ( n +2)+ x ₂ ( n +1)+ x ₂ ( n )) mod2

here,

[Number 5]

x ₁ (0)=1, x ₁ ( n )=0, n =1,2,...,30, N _C =1600

Further, the initial value of the scrambling code c(i) is assigned as follows.

That is, the initial value of the scrambling code c(i) is the terminal number

[Number 7]

n _RNTI ( RNTI : Radio Network Temporally ID )

(physical) cell (or sector) number

And slot number

[Number 9]

n _s

The value of the decision.

Furthermore, such prior art discloses a control device having a transmission allocation mechanism that selects at least two transmission sectors transmitted to the mobile station in accordance with the reception quality of the mobile station notification, and transmits and distributes the mobile station to the mobile station. A transmission mechanism that transmits a sector to the same scrambling code for sector identification and transmits it to the mobile station (for example, Patent Document 1 below).

Further, a base station apparatus having a base station-specific scrambling generating unit that generates a base station-specific scrambling code, an intrinsic orthogonal sequence generating unit that generates an orthogonal sequence unique to a sector, and a soft-synthesis according to each physical channel are disclosed. Whether or not the multiplication control unit that controls whether the base station unique scrambling code is multiplied by the sector-specific orthogonal sequence (for example, Patent Document 2 below)

Advanced technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2006-311475

Patent Document 2: Japanese Patent Laid-Open Publication No. 2008-92379

Non-patent literature

Non-Patent Document 1: R1-084203

Non-Patent Document 2: 3GPP TS 36.210 V8.6.0

Non-Patent Document 3: 3GPP TS 36.211 V8.2.0

Non-Patent Document 4: R1-081229

As described above, the initial value of the scrambling code is determined by the terminal number, the cell number, and the slot number, and the terminal number is set for each cell according to the base station, and the cell number is also different for each cell. Also, the slot number also has a number different between cells. Therefore, when CoMP transmission is performed on a terminal from a different cell, the initial value of the scrambling code is different depending on each cell. Therefore, each base station and the terminal machine create different scrambling codes, and use this to perform the processing of disturbance and descrambling. Therefore, the processing of each base station and terminal is complicated, and the power consumption is also increased.

Further, the patent documents 1 and 2 do not disclose the case where different data is transmitted from two sectors. This is because, as described in Patent Document 1, when the same scrambling code is used to transmit different data from two sectors, the mobile station receives two signals, but the two signals interfere with each other and cannot recognize the two sectors. The reason for the information sent.

Accordingly, it is an object of the present invention to provide a wireless communication method for a wireless communication system, a base station device, a terminal device, and a wireless communication system for reducing the processing of a terminal device or a base station device.

Further, another object of the present invention is to provide a wireless communication system or the like that seeks to reduce power consumption in a terminal device or a base station device.

According to one aspect, in the wireless communication system in which the first and second base station apparatuses each having one or a plurality of cells or sectors perform wireless communication, the first and second base station apparatuses have processing And a transmitting unit that transmits the first and second transmission data different from each other by the cell or the sector to the terminal device, and uses the common scrambling code to respectively perform the first and the first (2) transmitting the data to the disturbance processor; the transmitting unit transmits the first and second transmission data that have been subjected to the disturbance processing to the terminal device; and the terminal device includes a receiving unit, and the receiving unit receives the 1 and the second transmission data, and the first and second transmission data are descrambled by using the common scrambling code.

Further, according to another aspect, in the wireless communication system in which the first and second base station apparatuses each having one or a plurality of cells or sectors perform wireless communication with each other, the terminal apparatus includes a processing unit and a transmission. The processing unit performs a scrambling process on the first and second transmission data different from each other according to the cell or the sector, and the transmission unit performs the first and the first processing of the disturbance processing. The second transmission data is transmitted to the first and second base station apparatuses, respectively, and the first and second base station apparatuses have a receiving unit that receives the first and second transmission materials and uses the common The scrambling code is used to de-scramble the first and second transmitted data.

The present invention can provide a wireless communication method for a wireless communication system, a base station device, a terminal device, and a wireless communication system that are reduced in processing by a terminal device or a base station device. It is possible to provide a wireless communication system or the like that seeks to reduce power consumption in a terminal device or a base station device.

Simple illustration

Fig. 1 is a view showing a configuration example of a wireless communication system.

Fig. 2 is a view showing a configuration example of a wireless communication system in the downstream direction.

Fig. 3 is a view showing a configuration example of a main base station device.

Fig. 4 is a view showing a configuration example of a slave base device.

Fig. 5 is a view showing a configuration example of a terminal device.

Fig. 6 is a view showing a configuration example of a scrambling code creation unit.

Fig. 7 is a flow chart showing an example of the operation.

Fig. 8 is a flow chart showing an example of the operation.

Fig. 9 is a view showing an example of the configuration of a wireless communication system in the uplink direction.

Fig. 10 is a view showing a configuration example of a main base station device.

Fig. 11 is a view showing an example of the configuration of the slave base station apparatus.

Fig. 12 is a view showing a configuration example of a terminal device.

Figure 13 is a flow chart showing an example of the operation.

Fig. 14 is a flow chart showing an example of the operation.

Fig. 15 is a view showing a configuration example of a terminal device.

Fig. 16 is a view showing a configuration example of a terminal device.

Fig. 17 is a view showing a configuration example of a base station device.

Form for implementing the invention

The mode for carrying out the invention will be described below. Fig. 1 shows a structural example of the wireless communication system 10. The wireless communication system 10 includes two base station apparatuses (eNB: evolved Node_B, hereinafter referred to as "base station") 100-1 and 100-2, and a terminal apparatus (UE: User Equipment, hereinafter referred to as "terminal set") 200. The base stations 100-1, 100-2 transmit different data, and the terminal 200 receives the data (downstream direction). Further, the terminal 200 can also transmit different data to the base stations 100-1 and 100-2 (upstream direction). Both the base stations 100-1, 100-2 and the terminal 200 can perform so-called CoMP communication. Hereinafter, the description will be made in the downlink direction (first embodiment) and the uplink direction (second embodiment). In addition, in 3GPP, "cell" is defined by the same content as the "sector", and in the following embodiments, "cell" = "sector" is used unless otherwise specified.

<First Embodiment>

First, let's explain the down direction. Fig. 2 is a view showing a configuration example of the wireless communication system 10 in the downstream direction. Among the two base stations 100-1 and 100-2, the base station 100-1 is the master base station, and the base station 100-2 is the slave base station. The primary base station 100-1 is a base station that is connected to the terminal 200 before performing CoMP transmission, and base station that performs CoMP transmission from the base station 100-2. The primary base station 100-1 transmits a control signal to the terminal 200. The terminal 200 receives different transmission data (DSCH) transmitted from the primary base station 100-1 and the base station 100-2 in accordance with the control signal.

<Structure example of main base station>

A description will be given of a configuration example of the main base station 100-1 of the first embodiment. Fig. 3 is a view showing the main base station 100-1.

The main base station 100-1 includes an antenna 101, a reception radio unit 102, a demodulation decoding unit 103, a connection request signal extracting unit 104, a radio channel control unit 105, a cell information signal generating unit 106, a CoMP communication request signal extracting unit 107, and a CoMP. Communication execution determination and control unit (hereinafter referred to as "control unit") 108, radio channel quality information extracting unit 109, scheduler 110, control signal generating unit 111, scrambling code generating unit 112, transmission data buffer 113, and coding adjustment The variable unit 114 and the transmission wireless unit 115.

The antenna 101 transmits and receives a wireless signal between the terminal and the terminal 200.

The reception radio unit 102 outputs a radio signal received by the antenna 101 as a reception signal.

The demodulation and decoding unit 103 demodulates and decodes the received signal output from the reception radio unit 102.

The connection request signal extracting unit 104 extracts the connection request signal from the received signal such as demodulation. The connection request signal is a signal used when the terminal 200 is required to make a line connection with the primary base station 100-1.

When the connection request signal is input from the connection request signal extracting unit 104, the wireless line control unit 105 selects, for example, any cell number and terminal number of the plurality of cell numbers and terminal numbers held therein, and outputs the result to the cell information signal generating unit 106 and The scrambling code creation unit 112.

The cell information signal creation unit 106 creates cell information from the cell number and the terminal number output from the radio channel control unit 105 and the slot number output from the scheduler 110. The made cell information is sent as a cell information signal to a base station (e.g., from base station 100-2) that performs CoMP transmission. Further, the cell information signal is transmitted to the terminal device 200, and is also output to the code modulation unit 114.

The CoMP communication request signal extracting unit 107 extracts the CoMP communication request signal from the received signal output from the decoding and transforming unit 103. The CoMP communication request signal is, for example, a signal transmitted from the terminal 200 when the terminal 200 is to perform CoMP communication.

The control unit 108 determines whether or not to perform CoMP transmission, and determines that the CoMP transmission execution notification is notified from the base station 100-2 when CoMP transmission is performed. The control unit 108 determines whether or not to perform CoMP transmission, for example, based on the radio channel quality output from the radio channel quality information extracting unit 109 and the radio channel quality transmitted from the base station 100-2. The CoMP transmission execution notification is also output to the scheduler 110 and the cell information signal generation unit 106. The details of the execution determination of the CoMP transmission will be described later.

The wireless channel quality information extracting unit 109 extracts the wireless channel quality information from the received signal output from the demodulation decoding unit 103. The wireless line quality information is information transmitted from, for example, the terminal 200.

The scheduler 110 determines the coding rate, the modulation method, and the like (scheduled) used for communication with the terminal 200 in the downstream direction in accordance with the wireless channel quality information output from the wireless channel quality information extracting unit 109. The scheduler 110 outputs schedule information on the determined coding rate to the control signal creation unit 111. Further, the scheduler 110 transmits the use frequency and the precoding information in the schedule information as a CoMP control signal to the slave base station 100-2, and outputs the slot number to the cell information signal creation unit 106 and the scrambling code creation unit 112. Further, the scheduler 110 controls the code modulation unit 114 and the transmission wireless unit 115 based on the determined schedule information to perform encoding processing of the transmission data and the like.

The control signal creation unit 111 creates a control signal including the schedule information output from the scheduler 110, and outputs it to the code modulation unit 114.

The scrambling code creation unit 112 creates an initial value of the scrambling code in accordance with the slot number output from the scheduler 110, the cell number output from the radio channel control unit 105, and the terminal number, and sequentially creates a scrambling code. The details of the scrambling code creation unit 112 will be described later.

The transmission data buffer 113 temporarily memorizes the transmission data transmitted from the primary base station 100-1 to the terminal 200.

The code modulation unit 114 uses the scrambling code created by the scrambling code creation unit 112, and scrambles the transmission data outputted from the transmission data buffer 113, and encodes and modulates the transmitted data after the disturbance according to the scheduling information. Further, the code modulation unit 114 performs processing such as encoding the cell information output from the cell information signal generating unit 106 and the control signal output from the control signal generating unit 111, and may perform the scrambling process.

The transmission radio unit 115 performs processing (or weight processing) of weighting the transmission data or the like on the transmission data output from the code modulation unit 114 in accordance with the precoding information created by the scheduler 110. Further, the transmission radio unit 115 generates a pilot signal (or a known signal). The output from the transmission radio unit 115 is transmitted as a radio signal to the terminal 200 via the antenna 101.

<Example of structure from base station>

Next, a configuration example of the slave base station 100-2 of the first embodiment will be described. The base station 100-2 has the same structure as the main base station 100-1.

The control unit 108 inputs the CoMP communication request from the CoMP communication request signal extracting unit 107, and further outputs a CoMP execution notification to the scheduler 110 when receiving the CoMP execution notification from the primary base station 100-1.

The scheduler 110 follows the wireless channel quality information output from the wireless channel quality information extracting unit 109 to schedule the downlink. Further, the scheduler 110 receives the CoMP execution notification from the control unit 108, and when receiving the CoMP control signal from the primary base station 100-1, performs scheduling for performing CoMP transmission. The scheduler controls the code modulation unit 114 and the transmission wireless unit 115 to perform encoding processing and the like according to the schedule.

The scrambling code creation unit 112 inputs cell information from the main base station 100-1, and creates an initial value of the scrambling code based on the cell information, and sequentially creates a scrambling code. The details will be described later. Since the scrambling code creation unit 112 creates the scrambling code in accordance with the cell information notified from the main base station 100-1, the primary base station 100-1 and the base station 100-2 create the same scrambling code. The generated scrambling code is output to the code modulation unit 114, and the transmission data transmitted from the base station 100-2 is subjected to scrambling processing.

<Configuration example of terminal machine>

Next, a description will be given of a configuration example of the terminal device 200. Fig. 5 is a view showing a configuration example of the terminal device 200.

The terminal 200 includes an antenna 201, a reception radio unit 202, a demodulation and decoding unit 203, a radio quality measurement and calculation unit (hereinafter referred to as a calculation unit) 204, a radio channel quality information creation unit 205, a cell information extraction unit 206, and a scrambling code creation. Unit 207, reception control signal extraction unit 208, terminal setting control unit 209, reception power measurement unit 210, line connection control unit 211, connection request signal creation unit 212, code modulation unit 213, transmission radio unit 214, and CoMP communication control The unit 220 and the CoMP communication request signal creation unit 221.

The antenna 201 transmits and receives a wireless signal to and from each of the base stations 100-1 and 100-2.

The reception radio unit 202 outputs a radio signal received by the antenna 201 as a reception signal.

The demodulation and decoding unit 203 demodulates the received signal using the scrambling code created by the scramble code generating unit 207, and demodulates and decodes the received signal in accordance with the demodulation method set by the terminal setting control unit 209 or the like.

The calculation unit 204 measures the wireless quality of each wireless line with respect to a pilot signal transmitted from the primary base station 100-1 or the base station 100-2. The calculation unit 204 measures the radio channel quality by measuring the SINR (Signal to Interference Noise Ratio) of the pilot signal or the like.

The wireless channel quality information creating unit 205 creates wireless channel quality information in accordance with the wireless channel quality outputted by the calculating unit 204. The radio channel quality information is, for example, a CQI (Channel Quality Indicator) or the like. The created wireless channel quality information is output to the code modulation unit 213.

The cell information extracting unit 206 extracts cell information from the received signal output from the demodulation decoding unit 203. The extracted cell information is output to the scrambling code creation unit 207.

The scrambling code creation unit 207 creates an initial value of the scrambling code based on the cell information (including the cell number, the terminal number, and the slot number), and sequentially creates a scrambling code. The scrambling code creation unit 107 outputs the generated scrambling code to the demodulation decoding unit 203.

The reception control signal extracting unit 208 extracts a control signal from the received signal and outputs it to the terminal setting control unit 209.

The terminal setting control unit 209 controls the receiving wireless unit 202 and the demodulation decoding unit 203 based on the schedule information included in the control signal so that the received data of the base stations 100-1 and 100-2 can be demodulated, decoded, and the like.

The received power measurement unit 210 measures the received power of, for example, the pilot signal in the received signal, and outputs the measurement result to the line connection control unit 211 and the CoMP communication control unit 220.

The line connection control unit 211 determines whether or not to connect the lines with the base stations 100-1 and 100-2 based on the received power. The line connection control unit 211 determines the connection line when the received power is equal to or higher than the threshold value, and if not, determines that the line is not connected. When the line connection control unit 211 determines the connection line, the line connection control unit 211 outputs an instruction signal to the connection request signal creation unit 212.

The connection request signal creation unit 212 creates a connection request signal based on the instruction signal, and outputs it to the code modulation unit 213.

When the received power is equal to or greater than, for example, the threshold value, the CoMP communication control unit 220 outputs an instruction to generate a CoMP communication request signal to the CoMP communication request signal creation unit 221.

The CoMP communication request signal creation unit 221 creates a CoMP communication request signal in response to an instruction from the CoMP communication control unit 220, and outputs it to the code modulation unit 213.

The code modulation unit 213 performs coding and modulation processing on the radio channel quality information, the connection request signal, the CoMP communication request signal, and the like.

The transmission radio unit 214 controls the transmission power for the radio channel quality information or the like that has been encoded, and outputs it to the antenna 201 as a radio signal. The radio channel quality information and the like are transmitted to the base stations 100-1 and 100-2 as radio signals.

<Configuration example of scrambling code creation unit>

Next, a description will be given of a configuration example of the scrambling code creation unit 207 of the main base station 100-1, the scrambling code creation unit 112 of the base station 100-2, and the terminal unit 200. Fig. 6 is a view showing a configuration example of the scrambling code creation units 112 and 207, and is a known Kim's code generator.

The scrambling code creation units 112 and 207 have first and second temporary registers (or flip-flops) 112-1 and 112-3, and first to third exclusive logical AND circuits 112-2, 112-4, and 112-5. .

The scrambling code creation units 112 and 207 generate a King's code (or scrambling code) of length "31", and the output is a scrambling code c(n). The generator polynomial of the scrambling code c(n) is represented by the above number 2 to 4.

<Example of operation in the downward direction>

Next, an operation example of the first embodiment will be described. Fig. 7 and Fig. 8 are flowcharts showing an example of the operation. Further, the terminal 200 is located in an area connectable to both the primary base station 100-1 and the base base station 100-2.

First, the main base station 100-1 notifies the terminal device 200 of the cell information or the like (S10). The cellular information notified by the primary base station 100-1 may also include cellular information (cell number, terminal, and slot number) created by the cellular information signal generating unit 106.

Next, the primary base station 100-1 transmits a pilot signal (S11). For example, the pilot signal is generated by the transmitting radio unit 115 of the primary base station 100-1.

Then, the terminal device 200 selects a cell to be a communication target based on the received pilot signal or the like (S12), and sets a line between the selected cell (S13). For example, the received power measuring unit 210 of the terminal 200 measures the received power of the pilot signal, and the line connection control unit 211 determines the connection of the line to select a cell (for example, the primary base station 100-1). Then, the connection request signal creation unit 212 creates a connection request signal, transmits it to the main base station 100-1, and sets the line. The terminal 200 is initially connected to the primary base station 100-1.

Next, the terminal 200 measures the quality (for example, CQI) of the wireless line with the primary base station 100-1 (S14), and transmits the wireless channel quality information to the primary base station 100-1 (S15). For example, the calculation unit 204 of the terminal 200 measures the radio channel quality based on the pilot signal, and the radio channel quality information creation unit 205 creates the radio channel quality information, and transmits the information to the main base station 100-1.

Then, the master base station 100-1 performs scheduling according to the wireless channel quality information (S16). For example, the scheduler 110 of the main base station 100-1 performs scheduling based on the wireless quality information extracted by the wireless quality information extracting unit 109.

Next, the master base station 100-1 performs transmission signal processing (S17). For example, the code modulation unit 114 reads the transmission data stored in the transmission data buffer 113, and performs processing such as encoding by the coding rate of the scheduler 110 or the like. Further, the control signal including the schedule information created by the control signal generation unit 111 is also subjected to processing such as encoding in the code modulation unit 114.

Then, the master base station 100-1 transmits the control signal and the transmission data to the terminal device 200 (S18, S19).

When the terminal 200 receives the control signal and transmits the data, it performs reception signal processing (S20). For example, the terminal setting control unit 209 controls the receiving wireless unit 202 and the demodulation decoding unit 203 to perform demodulation, decoding, and the like based on the schedule information included in the received control signal.

Next, the terminal device 200 receives the cell information and the like signal (S21, S22) notified from the base station 100-2. Then, the terminal 200 selects the base station 100-2 as the connection base station (S23), and sets a line with the slave base station 100-2 (S24).

Next, a process for performing CoMP transmission is performed between the terminal 200 and the base stations 100-1 and 100-2. First, the terminal 200 receives the pilot signals from the master base station 100-1 and the slave base station 100-2 (S25, S26), and measures the channel quality of each wireless line (S27). For example, the calculation unit 204 of the terminal 200 measures the quality of each radio channel. In addition, at this time, the signal indicating the primary base station 100-1 and the base station 100-2 may be the cell number of the primary base station 100-1 and the original cell from the base station 100-2. The number is based on different indication signals.

Then, the terminal 200 transmits the measured radio channel qualities to the slave base station 100-2 and the master base station 100-1 (S28, S30). For example, the wireless channel quality information creating unit 205 creates each wireless channel quality information and transmits the information.

The base station 100-2 transmits the wireless channel quality information transmitted from the terminal 200 to the primary base station 100-1 (S29). For example, the wireless channel quality information extracting unit 109 from the base station 100-2 transmits the wireless channel quality between the extracted terminal devices 200 to the primary base station 100-1.

Next, the master base station 100-1 determines whether or not the CoMP transmission is possible (S31). For example, when the control unit 108 of the master base station 100-1 determines that the radio channel quality of the base station 100-2 and the radio channel quality extracted by the CoMP communication request signal extracting unit 107 are both above the threshold value, it is determined that CoMP communication can be performed. . The threshold value compared with the radio channel quality of the primary base station 100-1 and the threshold value compared with the radio channel quality of the base station 100-2 may be the same or different. Further, when the control unit 108 determines that the CoMP transmission cannot be performed, the control unit 108 ends the series of processing.

Then, the terminal 200 transmits a CoMP transmission execution request to the slave base station 100-2 and the master base station 100-1 (S32, S33). For example, the CoMP communication control unit 220 of the terminal 200 outputs an instruction to execute the request, and transmits the request signal from the CoMP communication request signal creation unit 221.

The master base station 100-1 determines that CoMP transmission is possible (S31), and when receiving the CoMP execution request from the terminal device 200 (S33), transmits a CoMP execution notification to the slave base station 100-2 and the terminal device 200 (S34, S35). ). For example, the control unit 108 of the primary base station 100-1 transmits a CoMP execution notification to the secondary base station 100-2. Further, for example, the control unit 108 outputs a CoMP execution notification to the scheduler 110, and transmits a CoMP execution notification from the scheduler 110 as a control signal to the terminal 200.

Next, the master base station 100-1 and the slave base station 100-2 perform processing for taking synchronization between the base stations (S36). This is because the transmission data is synchronously transmitted to the terminal 200 in the CoMP transmission. For example, the master base station 100-1 and the control unit from the base station 100-2 perform synchronization processing by transmitting and receiving signals to each other to synchronize the phases.

Then, the master base station 100-1 performs scheduling for performing CoMP transmission (S37). For example, when the scheduler 110 receives the CoMP execution notification from the control unit 108, the scheduler 110 performs scheduling according to the radio channel quality (S29, S30) or the like. The schedule information made includes the frequency of use and precoding information for CoMP transmission.

Next, the master base station 100-1 transmits the cell information to the slave base station 100-2 (S38). For example, the cell information signal creation unit 106 inputs the cell number and the terminal number from the wireless line control unit 105, and inputs the slot number output from the scheduler 110 to create a cell information including the cell number, the terminal number, and the slot number. After sending. For example, when the cell number and the terminal number are set to the terminal 200 (S13), the radio channel control unit 105 is created, and the cell information creation unit 106 may be notified by the CoMP execution notification of the control unit 108. The cell number and the like are read from the wireless line control unit 105. Regarding the slot number, the scheduler 110 can also schedule (S37), and output the number to the cell information creating unit 106. Further, the terminal 200 can directly notify the master base station 100-1 of the measured radio channel quality from the base station 100-2.

Next, the master base station 100-1 transfers the transmission material (for example, the transmission material 2) to the slave base station 100-2 (S39). For example, the scheduler 110 of the primary base station 100-1 reads a portion (e.g., transmission material 2) in the transmission data stored in the transmission data buffer 113, and transmits it to the secondary base station 100-2. The transmission data transmitted from the primary base station 100-1 is stored from the transmission data buffer 113 of the base station 100-2. Sending data 1 and sending data 2 are different depending on each cell.

Then, the master base station 100-1 notifies the transmission control information to the slave base station 100-2 (S40). For example, the scheduler 110 transmits scheduling information (S37) including precoding information and the like as transmission control information to the slave base station 100-2.

Next, the master base station 100-1 and the slave base station 100-2 perform signal transmission processing (S41, S42). For example, the scrambling code creation unit 112 of the primary base station 100-1 creates a scrambling code according to the cell number of the wireless line control unit 105 and the terminal number and the slot number of the scheduler 110. The code modulation unit 114 performs a scrambling process on the transmission material 1 using the scrambling code. Then, the transmission material 1 is encoded according to the schedule (S37) and the like. On the other hand, the scrambling code creation unit 112 of the base station 100-2 uses the cell information transmitted from the primary base station 100-1 (S38) to generate a scrambling code, and the code modulation unit 114 performs a scrambling process on the transmission data 2. The transmission data 2 is encoded in accordance with the transmission control information transmitted from the primary base station 100-1. In this way, since the primary base station 100-1 and the base station 100-2 generate the scrambling code from the common cell number, the terminal number, and the slot number, the same scrambling code can be created.

Next, the master base station 100-1 transmits the control signal and the transmission data to the terminal device 200 (S43, S44). The control signal includes, in addition to the coding rate used for CoMP transmission, the use frequency and precoding information, and the cellular information generated by the cell information signal generation unit 106.

Then, transmission data (for example, transmission material 2) different from the transmission data transmitted from the primary base station 100-1 is transmitted from the base station 100-2 to the terminal 200 (S45). For example, the transmission data 1 and the transmission data 2 are transmitted according to the pre-encoded information.

Next, the terminal 200 performs reception signal processing on the transmission data transmitted from the primary base station 100-1 and the base station 100-2 (S46). For example, the terminal setting control unit 20 of the terminal 200 controls the receiving wireless unit 202 and the demodulation decoding unit 203 based on the scheduling information included in the control signal (S43) to receive the primary base station 100-1 and the slave. Each of the base stations 100-2 transmits data. At this time, the scrambling code creation unit 207 of the terminal 200 creates a scrambling code based on the cell information (S10 or S43). Since the cell information is the same as that of the primary base station 100-1 and the base station 100-2, the terminal 200 can create the same scrambling code as that of the base stations 100-1 and 100-2. The demodulation and decoding unit 203 performs descrambling processing on the transmission data 1 and the transmission data 2 in accordance with the scrambling code.

As described above, in the first embodiment, when the CoMP transmission is performed, the master base station 100-1 transmits the cell information to the slave base station 100-2 (S38), so that the information for creating the scrambling code is shared, and the information can be created. Common scrambling code. Therefore, compared with the scrambling code which is different between each of the base stations 100-1 and 100-2, the wireless communication system can reduce the processing. Moreover, since the processing can be reduced, the power consumption of the terminal 200 and the base stations 100-1 and 100-2 can be reduced.

Further, the master base station 100-1 transmits the precoding information to the slave base station 100-2 (S40), and the two base stations 100-1 and 100-2 transmit different data to the terminal device 200 based on the precoded information. Therefore, since different data is transmitted from the two base stations 100-1 and 100-2 even if the common scrambling code is used, the terminal 200 can perform reception processing according to the precoding information included in the control signal (S43, S46). Therefore, it is also possible to prevent interference of two different data.

<Second embodiment>

Next, an example of the upward direction will be described. The second embodiment is an example in which data is transmitted from the terminal 200 to the uplink direction of the base stations 100-1 and 100-2.

Fig. 9 is a view showing a configuration example of the wireless communication system 10 of the second embodiment. The primary base station 100-1 transmits a control signal to the terminal 200. The terminal 200 transmits different transmission data (USCH) to the primary base station 100-1 and the secondary base station 100-2 in accordance with the received control signal.

<Structure example of main base station>

Next, a configuration example of the main base station 100-1 of the second embodiment will be described. Fig. 10 is a view showing a configuration example of the main base station 100-1.

The main base station 100-1 further includes a radio channel quality measurement and calculation unit (hereinafter referred to as a calculation unit) 121. The calculation unit 121 measures the radio channel quality with the terminal device 200 in accordance with the pilot signal transmitted from the terminal device 200, and measures the radio channel quality (for example, CQI).

Further, the scheduler 110 of the master base station 100-1 performs scheduling in the uplink direction, and controls the demodulation and decoding unit 103 and the reception radio unit 102 based on the schedule information created.

Further, the scrambling code creation unit 112 performs descrambling processing on the transmission data and the like transmitted from the terminal device 200, and outputs the generated scrambling code to the demodulation decoding unit 103.

<Example of structure from base station>

Next, a configuration example of the slave base station 100-2 of the second embodiment will be described. Fig. 11 is a view showing a configuration example of the slave base station 100-2.

The slave base station 100-2 also has a calculation unit 121.

Further, the scheduler 110 of the base station 100-2 sorts the uplink direction, and controls the demodulation and decoding unit 103 and the reception radio unit 102 based on the schedule information.

Furthermore, the scrambling code creation unit 112 also performs descrambling processing on the transmission data transmitted from the terminal device 200, and outputs the generated scrambling code to the demodulation decoding unit 103.

<Configuration example of terminal machine>

Next, a configuration example of the terminal device 200 of the second embodiment will be described. Fig. 12 is a view showing a configuration example of the terminal device 200. The terminal device 200 is also configured in the same manner as the terminal device 200 (Fig. 5) in the downstream direction.

The terminal setting unit 209 controls the code modulation unit 213 by performing processing such as encoding on the transmission data transmitted to the base stations 100-1 and 100-2 based on the control signal. Further, the terminal setting control unit 209 controls the transmission radio unit 214 based on the precoding information included in the control signal to weight the different transmission data and transmit the data to the base stations 100-1 and 100-2.

Further, the scrambling code creation unit 207 performs scrambling processing on the transmission data to be transmitted to the base stations 100-1 and 100-2, and outputs the generated scrambling code to the code modulation unit 213.

<Configuration example of scrambling code creation unit>

The scrambling code creation units 112 and 207 of the base stations 100-1 and 100-2 and the terminal unit 200 are the same as those of the first embodiment.

<Example of operation in the upward direction>

Next, an operation example of the second embodiment will be described. Fig. 13 and Fig. 14 are flowcharts showing an operation example.

After the line is set between the main base station 100-1 and the terminal 200- (S10 to S13), the terminal 200 transmits a pilot signal to the master base station 100-1 (S50). For example, the transmitting wireless unit 214 of the terminal 200 generates a pilot signal and transmits it. The cell information (S10) transmitted by the main base station 100-1 may also include cellular information created by the cell information signal generating unit 106.

Next, the master base station 100-1 measures the radio channel quality (for example, CQI) in the uplink direction according to the pilot signal (S51). For example, the measurement unit 121 of the main base station 100-1 performs measurement or the like.

Then, the master base station 100-1 performs scheduling in the uplink direction in accordance with the measured radio channel quality (S16). For example, the scheduler 110 schedules according to the quality of the wireless line output by the calculation unit 121.

Next, the master base station 100-1 transmits a control signal including the schedule information in the uplink direction (S18), and the terminal device 200 performs transmission signal processing in accordance with the control signal (S52). For example, the control signal generation unit 111 of the master base station 100-1 creates a control signal including schedule information, and transmits it by the code modulation unit 114 or the like. Further, the code modulation unit 213 of the terminal 200 encodes and modulates the transmission data based on the schedule information included in the received control signal.

Then, the terminal 200 transmits the transmission data to the main base station 100-1 (S53).

Next, the terminal 200 performs processing such as line setting with the slave base station 100-2 (S21 to S24). Then, processing for performing CoMP transmission is performed between the terminal 200 and the base stations 100-1 and 100-2.

First, the terminal 200 transmits a CoMP transmission execution request to each of the base stations 100-1 and 100-2 (S32 to S33). For example, the CoMP communication control unit 220 of the terminal 200 instructs the CoMP transmission execution request when the received power of each radio channel quality is equal to or greater than the threshold. The CoMP communication request signal creation unit 221 creates a CoMP communication request signal based on the instruction, and transmits it to the base stations 100-1 and 100-2.

Next, the terminal 200 transmits a pilot signal to each of the base stations 100-1 and 100-2 (S54, S55).

Then, each of the base stations 100-1 and 100-2 measures the quality of each radio channel (S56, S57). For example, the radio channel quality is measured by the calculation unit 121 of each of the base stations 100-1 and 100-2.

Next, the measured radio channel quality is transmitted from the base station 100-2 to the primary base station 100-1 (S58). For example, the radio channel quality measured by the calculation unit 121 of the base station 100-2 is transmitted to the main base station 100-1.

Thereafter, the master base station 100-1 performs CoMP transmission determination based on the two radio channel qualities (S31). For example, when the two radio channel qualities are equal to or greater than the threshold, the control unit 108 determines that CoMP transmission is performed. Further, the threshold value compared with the radio channel quality measured by the master base station 100-1 and the threshold value compared with the radio channel quality measured from the base station 100-2 may be the same or different.

When the primary base station 100-1 performs CoMP transmission, it transmits a CoMP transmission execution notification to the secondary base station 100-2 and the terminal 200 (S34 to S35).

Then, the master base station 100-1 performs synchronization processing with the slave base station 100-2 (S36), and performs scheduling for performing CoMP transmission (S37), and notifies the cellular information as in the first embodiment. From base station 100-2 (S38). Cell information includes cell number, terminal number, and slot number.

Thereafter, the master base station 100-1 transmits the transmission control information including the schedule information (S37) of the transmission data and the like in the uplink direction to the slave base station 100-2 (S40), and transmits the control signal to the terminal device 200 ( S43). The control signal may also include cellular information created by the cellular information signal generating unit 106. Moreover, the transmission control information and the control signal also include the frequency of use and precoding information.

Next, the terminal 200 performs transmission signal processing in accordance with the received control signal (S59). For example, the scrambling code creation unit 207 generates a scrambling code based on the cell information extracted by the cell information extracting unit 206 (S10 or S43), and outputs the generated scramble code to the code modulation unit 213. The coding and modulation unit 213 performs the scrambling process by using the same (or common) scrambling code for the transmission data 1 and the transmission data 2 which are different for each cell. Further, the terminal setting control unit 209 of the terminal 200 controls the code modulation unit 213 to perform processing such as encoding in accordance with the received schedule information. Furthermore, the terminal setting control unit 209 controls the transmission radio unit 214 to output the weighted transmission data based on the precoding information included in the control signal.

Then, the terminal 200 transmits the different transmission data (for example, the transmission data 1 and the transmission data 2) to the primary base station 100-1 and the secondary base station 100-2 (S60, S61). For example, the transmission radio unit 214 outputs the weighted transmission data based on the precoding information contained in the control signal.

Next, the master base station 100-1 performs reception signal processing on the transmission data (S62). For example, the scrambling code creation unit 112 of the main base station 100-1 creates a scrambling code based on the slot number (S37) determined by the scheduler 110 and the cell number and the terminal number of the radio channel control unit 105. The generated scrambling code is output to the demodulation decoding unit 103, and the transmission data 2 is subjected to descrambling processing. Thereafter, the demodulation and decoding unit 103 performs processing such as demodulation and decoding of the transmission data.

Further, the base station 100-2 performs reception signal processing on the transmission data (S63). For example, the scrambling code creation unit 112 from the base station 100-2 makes a scrambling code in accordance with the cell information (S38) transmitted from the main base station 100-1. The scrambled code is output to the demodulation decoding unit 103, and the transmission data 1 is subjected to descrambling processing. For example, the base stations 100-1, 100-2 perform descrambling processing on the transmission data 1 or the transmission data 2, respectively, using the same scrambling code as the scrambling code used by the terminal 200 in the scrambling process.

Then, the transmission material 1 subjected to demodulation or the like is transferred from the base station 100-2 to the main base station 100-1 (S64). For example, the demodulation and decoding unit 103 of the base station 100-2 transmits the transmission material 1 to the main base station 100-1 under the control of the scheduler 110 or the like.

As described above, in the second embodiment, since the master base station 100-1 also transmits the cell information to the slave base station 100-2 (S38), the slave base station 100-2 can be made the same as the master base station 100-1. Scrambling code. Further, since the cell information is also transmitted from the main base station 100-1 to the terminal device 200, the terminal device 200 can also create the same scrambling code as the base stations 100-1 and 100-2. Therefore, the present wireless communication system 10 can reduce the processing as compared with when a different scrambling code is created. Further, the terminal 200 on the transmitting side and each of the base stations 100-1 and 100-2 on the receiving side can generate power consumption reduction without making a different scrambling code.

<Other Embodiments>

Next, other embodiments will be described. Each of the above embodiments is described by a judge who performs CoMP transmission by the primary base station 100-1 (S31 in Fig. 8 and the like). For example, the terminal 200 can also make such a determination. For example, the CoMP communication control unit 220 of the terminal 200 determines whether or not the wireless communication quality (S27 in FIG. 7) is equal to or higher than the threshold. At this time, since the measured wireless communication quality is not transmitted to the base stations 100-1 and 100-2, the processing of the primary base station 100-1 can be further reduced.

Further, each of the above embodiments will be described with the requester who performs the execution of CoMP transmission by the terminal device 200. For example, the primary base station 100-1 can also perform execution requirements. In the case of the downlink direction, for example, when the master base station 100-1 determines to perform CoMP transmission (S31), the CoMP execution request may be transmitted to the terminal 200 and the slave base station 100-2. Thereafter, the master base station 100-1 can execute by the notification execution notification (S34, S35). Further, in the uplink direction, after the CoMP transmission determination (S31), the CoMP transmission request can be transmitted to the terminal device 200 or the like, and the (S34 to 35) CoMP execution notification can be notified and executed. The configuration example of the terminal device 200 at this time is shown in Fig. 15 (downward direction) and Fig. 16 (upward direction). Compared with the above-described embodiment, the terminal device 200 has no CoMP communication control unit 220 and the CoMP communication request signal creation unit 221, so that the power consumption can be further reduced.

Furthermore, the above embodiments have described an example in which the transmission data is transmitted from the primary base station 100-1 and the two base stations 100 of the base station 100-2. For example, a base station 100 having a plurality of cells (or sectors) can also transmit and transmit data. Fig. 17 is a view showing a configuration example of the base station device 100. The base station device 100 includes a main communication unit 150-1, a slave communication unit 150-2, and antennas 101-1 and 101-2 connected to the respective communication units 150-1 and 150-2. The main communication unit 150-1 has the respective units 102 and the like in the main base station 100-1, and the communication unit 150-2 has the respective units 102 and the like in the base station 100-2. For example, the wireless channel quality information is output from the communication unit 150-2 to the main communication unit 150-1, and the main communication unit 150-1 outputs the cell information or the like to the slave communication unit 150-2. Thereby, the base station 100 can be executed in the downlink direction and the uplink direction in the same manner as in the first and second embodiments.

Furthermore, in the above embodiments, the cell number, the terminal number, and the slot number used for CoMP transmission can also be used as a cell number, a terminal number, and a slot number for CoMP. For example, the control unit 108 of the master base station 100-1 determines the execution time of the CoMP transmission (S31), and outputs the notification to the cell information signal creation unit 106. The cell information signal creation unit 106 may also rewrite the cell number, the terminal number, and the slot number to each number dedicated to CoMP. Further, since the cell information signal creation unit 106 transmits the cell information to the slave base station 100-2, the base station 100-2 can also create the same scrambling code as the master base station 100-1.

Furthermore, the above embodiments have described an example in which CoMP transmission is performed between two base stations 100-1 and 100-2 and the terminal 200. CoMP transmission can also be performed between, for example, three or more base stations 100 and the terminal 200. At this time, any one of the three or more base stations is the primary base station, and the other base stations are the slave base stations. Similarly to the above embodiments, the cellular information can be transmitted from the primary base station to a plurality of slave base stations. .

10. . . Wireless communication system

100. . . Base station

100-1. . . Main base station

100-2. . . Base station

101. . . antenna

101-1. . . antenna

101-2. . . antenna

102. . . Receiving wireless department

103. . . Demodulation and decoding unit

104. . . Connection request signal extraction unit

105. . . Wireless line control department

106. . . Cell information signal making department

107. . . CoMP communication requires signal extraction

108. . . CoMP communication execution determination and control department

109. . . Wireless line quality information extraction department

110. . . Scheduler

111. . . Control signal generation unit

112. . . Scrambling code making department

112-1. . . 1st register

112-2. . . 1st exclusive logic and circuit

112-3. . . 2nd register

112-4. . . 2nd exclusive logic and circuit

112-5. . . 3rd exclusive logic and circuit

113. . . Send data buffer

114. . . Code modulation department

115. . . Send wireless department

121. . . Wireless line quality measurement and calculation unit

150-1. . . Main communication department

150-2. . . From the Ministry of Communications

200. . . Terminal

201. . . antenna

202. . . Receiving wireless department

203. . . Demodulation and decoding unit

204. . . Wireless line quality measurement and calculation unit

205. . . Wireless line quality information creation department

206. . . Cell information extraction department

207. . . Scrambling code making department

208. . . Receiving control signal extraction unit

209. . . Terminal setting control unit

210. . . Receiving power measurement department

211. . . Line connection control

212. . . Connection request signal making section

213. . . Code modulation department

214. . . Send wireless department

220. . . CoMP Communication Control Department

221. . . CoMP communication requires signal generation department

S10~S46. . . step

S50~S64. . . step

Fig. 1 is a view showing a configuration example of a wireless communication system.

Fig. 2 is a view showing a configuration example of a wireless communication system in the downstream direction.

Fig. 3 is a view showing a configuration example of a main base station device.

Fig. 4 is a view showing a configuration example of a slave base device.

Fig. 5 is a view showing a configuration example of a terminal device.

Fig. 6 is a view showing a configuration example of a scrambling code creation unit.

Fig. 7 is a flow chart showing an example of the operation.

Fig. 8 is a flow chart showing an example of the operation.

Figure 9 is a diagram showing a configuration example of a wireless communication system in an uplink direction.

Fig. 10 is a view showing a configuration example of a main base station device.

Fig. 11 is a view showing an example of the configuration of the slave base station apparatus.

Fig. 12 is a view showing a configuration example of a terminal device.

Figure 13 is a flow chart showing an example of the operation.

Fig. 14 is a flow chart showing an example of the operation.

Fig. 15 is a view showing a configuration example of a terminal device.

Fig. 16 is a view showing a configuration example of a terminal device.

Fig. 17 is a view showing a configuration example of a base station device.

100-1. . . Main base station

102. . . Receiving wireless department

103. . . Demodulation and decoding unit

104. . . Connection request signal extraction unit

105. . . Wireless line control department

106. . . Cell information signal making department

107. . . CoMP communication requires signal extraction

108. . . CoMP communication execution determination and control department

109. . . Wireless line quality information extraction department

110. . . Scheduler

111. . . Control signal generation unit

112. . . Scrambling code making department

113. . . Send data buffer

114. . . Code modulation department

115. . . Send wireless department

Claims (15)

A wireless communication system is a wireless communication between a first and a second base station device having one or a plurality of cells or sectors and a terminal device, wherein the first and second base station devices have The processing unit is configured to transmit the first and second transmission data by using a common scrambling code when transmitting the first and second transmission data different from each other by the cell or the sector. And the transmitting unit transmits the first and second transmission data that have been subjected to the disturbance processing to the terminal device, and the terminal device includes a receiving unit that receives the first and second transmissions The data is subjected to the descrambling of the first and second transmission materials by using the aforementioned common scrambling code. The wireless communication system according to claim 1, wherein the first base station device has cell information for creating the common scrambling code, and transmits the information to the cell information generating unit of the second base station device. Each processing unit of the first and second base station apparatuses creates the common scrambling code based on the cellular information. A wireless communication system according to claim 2, wherein the transmitting unit transmits the cellular information to the terminal device, and the receiving unit creates the common scrambling code based on the cellular information. The wireless communication system of claim 2, wherein the first and second base station devices have one or a plurality of cells or sectors, and the cellular information includes a cell number for identifying a cell or a sector, and is used for The terminal number of the terminal device and the slot number for identifying the slot are identified. The wireless communication system of claim 4, wherein the cell number, the terminal number, and the slot number are dedicated cell numbers, terminal numbers, and slot numbers used when transmitting the first and second materials. The wireless communication system according to claim 1, wherein the first base station device has a scheduler for creating precoding information, and the scheduler transmits the precoding information to the second base station device, the first And each of the transmitting units of the second base station device weights the first and second transmission data based on the precoding information, and transmits the first and second transmission data to the terminal device. A wireless communication method is a wireless communication method for a wireless communication system in which wireless communication is performed between a first and a second base station device having one or a plurality of cells or sectors, and the first communication device is characterized in that: And the second base station apparatus transmits the first and second transmission materials respectively using the common scrambling code when transmitting the first and second transmission data different from each other by the cell or the sector. Performing a scrambling process, and transmitting the first and second transmission data subjected to the disturbance processing to the terminal device, respectively, wherein the terminal device receives the first and second transmission data, and uses the common scrambling code to 1 and the second transmission data are descrambled. A base station device for wirelessly communicating with a terminal device together with other base station devices having one or more cells or sectors; characterized in that: one or a plurality of the aforementioned cells or the aforementioned sectors The processing unit transmits the first or second transmission data different from each other by the cell or the sector to the terminal device together with the other base station device, and uses the common scrambling code to set the first or The second transmission data is respectively subjected to a disturbance processor; and the transmission unit transmits the first or second transmission data that has been subjected to the disturbance processing to the terminal device. A terminal device that wirelessly communicates with first and second base station apparatuses each having one or a plurality of cells or sectors, and has a receiving unit from the first and second base stations When the device receives the first and second transmission data different from each other according to the cell or the sector, the first and second transmission data use the common scrambling code to receive the first and second transmission data respectively subjected to the disturbance processing. And using the common scrambling code to perform the descrambling of the first and second transmission materials. A wireless communication system is a wireless communication device between a first and a second base station device having one or a plurality of cells or sectors and a terminal device, wherein the terminal device has a processing unit and is paired The first and second transmission data different from each other according to the cell or the sector are subjected to a scrambling process using a common scrambling code; and the transmitting unit transmits the first and second transmission data respectively subjected to the disturbance processing to the In the first and second base station apparatuses, the first and second base station apparatuses include: a receiving unit that receives the first and second transmission materials and uses the common scrambling code to perform the first And the second transmission data is sent to the descrambler. A wireless communication method is a wireless communication method for a wireless communication system in which wireless communication is performed between a first and a second base station device having one or a plurality of cells or sectors, and the terminal device is characterized in that: The device performs a scrambling process using the common scrambling code for the first and second transmission data different from each other according to the cell or the sector, and transmits the first and second transmission data subjected to the disturbance processing to the foregoing 1 and the second base station apparatus; the first base station and the second base station apparatus receive the first and second transmission materials, and perform the descrambling processing on the first and second transmission data using the common scrambling code. A base station device for wirelessly communicating with a terminal device together with other base station devices having one or more cells or sectors; characterized in that: one or a plurality of the aforementioned cells or the aforementioned sectors And the receiving unit performs a scrambling process on the first and second transmission data different from each other according to the cell or the sector, and receives the first or second transmission data subjected to the disturbance processing. And the above-mentioned first or second transmission data is subjected to descrambling processing using the aforementioned common scrambling code. A terminal device for wirelessly communicating with first and second base station apparatuses each having one or a plurality of cells or sectors, wherein the processing unit has a processing unit for the cell or the sector Each of the first and second transmission data different from each other uses a common scrambling code to perform a scrambling process; and the transmission unit transmits the first and second transmission data that have been subjected to the disturbance processing to the first and second bases, respectively. The device is installed. A wireless communication system is a wireless communication device between a base station device and a terminal device having a plurality of sectors and having first and second communication units corresponding to the respective sectors, wherein the first and the first Each of the communication units has a processing unit that transmits the first and second transmissions using a common scrambling code when transmitting the first and second transmission data different from each of the sectors to the terminal device. And the transmitting unit respectively transmits the first and second transmission data that have been subjected to the disturbance processing to the terminal device; and the terminal device includes a receiving unit that receives the first and The second transmission data is used, and the first and second transmission data are descrambled by using the common scrambling code. A wireless communication system is characterized in that a wireless communication system is provided between a base station device and a terminal device having a plurality of sectors and having first and second communication units corresponding to each sector, wherein the terminal device has: The first and second transmission data, which are different for each of the sectors, use a common scrambling code to perform a scrambling process; and the transmission unit respectively transmits the first and second transmission data subjected to the disturbance processing And transmitting to each of the base station apparatuses; the first and second communication units of the base station apparatus receive the first and second transmission materials, respectively, and perform the first and second transmission data by using the common scrambling code Unscramble processing.