JP6664131B2 - Allocation device, program to be executed by computer, and computer-readable recording medium recording program - Google Patents

Description

  The present invention relates to an assignment device, a program to be executed by a computer, and a computer-readable recording medium recording the program.

  In a wireless communication system using OFDM (Orthogonal Frequency Division Multiplexing), a guard band is provided to reduce adjacent interference. As a result, there are frequency bands that are not used for wireless communication.

  In order to shift from the currently mainstream wireless communication system using OFDM to the next-generation wireless communication system, OFDM using orthogonal multicarriers and non-orthogonal multicarriers such as GFDM (Generalized Frequency Division Multiplexing) are mixed. Hybrid multicarriers are being considered.

  For example, a method of arranging non-orthogonal multi-carriers in an OFDM guard band has been proposed (Non-Patent Documents 1 and 2).

Sugano, et al., "Influence of Mutual Interference on Simultaneous Transmission of OFDM and Advanced Multicarrier," IEICE Institute of Technology, B-17-19, Mar. 2015. Suzuki, et al., "Theoretical Interference Characteristics of GFDM on OFDM", IEICE University, B-17-4, Mar. 2016.

  However, in the hybrid multicarrier, transmission quality is degraded due to mutual interference between OFDM and non-orthogonal multicarrier.

If a frequency interval (Δf _G ) between the non-orthogonal multicarrier and OFDM is set apart in order to suppress mutual interference, a band that does not contribute to transmission is generated, resulting in insufficient band utilization.

  Thus, according to an embodiment of the present invention, there is provided an adjustment device for allocating power and frequency of a terminal device so as to suppress mutual interference.

  Further, according to the embodiment of the present invention, there is provided a program for causing a computer to execute allocation of power and frequency of a terminal device so as to suppress mutual interference.

  Further, according to the embodiment of the present invention, there is provided a computer-readable recording medium in which a program for causing a computer to execute power and frequency allocation of a terminal device so as to suppress mutual interference is recorded.

  According to the embodiment of the present invention, the allocating device includes a first terminal device that performs wireless communication according to the first wireless communication method and a first terminal device that performs wireless communication for the next generation than the first wireless communication method. An assignment device that assigns power and frequency used by a second terminal device in a wireless communication environment in which a second terminal device that performs wireless communication according to the second wireless communication method coexists. Prepare. The calculating means calculates mutual interference obtained by multiplying a ratio of energy per modulation symbol in the channel in the second wireless communication system to energy per modulation symbol in the channel in the first wireless communication system by a correlation coefficient, The reciprocal of the signal-to-noise power ratio when performing wireless communication by the first wireless communication method is calculated. The allocating means allocates the power and frequency used by the second terminal device such that the mutual interference is sufficiently smaller than the reciprocal of the signal-to-noise power ratio.

  According to the embodiment of the present invention, the allocating apparatus sets the signal-to-noise power ratio when the mutual interference between the first wireless communication system and the second wireless communication system performs wireless communication according to the first wireless communication system. The power and the frequency used by the second terminal device are allocated so as to be sufficiently smaller than the reciprocal of.

  Therefore, it is possible to allocate the power and the frequency used by the second terminal device that performs the wireless communication by the second wireless communication system while suppressing the mutual interference.

  Further, according to the embodiment of the present invention, a program to be executed by a computer includes: a first terminal device that performs wireless communication according to a first wireless communication method; And causing the computer to execute the allocation of power and frequency used by the second terminal device in a wireless communication environment in which a second terminal device that performs wireless communication according to the second wireless communication system is mixed. A program, wherein the arithmetic means multiplies a ratio of energy per modulation symbol in a channel in the second radio communication system to energy per modulation symbol in a channel in the first radio communication system by a correlation coefficient. And the reciprocal of the signal-to-noise power ratio when performing wireless communication according to the first wireless communication method. A first step of allocating the power and frequency used by the second terminal device to the computer such that the mutual interference is sufficiently smaller than the reciprocal of the signal-to-noise power ratio. Let it run.

  By reading and executing the program, the mutual interference between the first wireless communication system and the second wireless communication system is more than the reciprocal of the signal-to-noise power ratio when wireless communication is performed by the first wireless communication system. The power and the frequency used by the second terminal device are allocated so as to be smaller.

  Therefore, it is possible to allocate the power and the frequency used by the second terminal device that performs the wireless communication by the second wireless communication system while suppressing the mutual interference.

  Further, according to an embodiment of the present invention, a recording medium is a computer-readable recording medium on which the program according to any one of claims 5 to 8 is recorded.

  The power and frequency used by the second terminal device that performs wireless communication by the second wireless communication method while suppressing mutual interference can be allocated.

FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the base station shown in FIG. 1. It is the schematic of the terminal device shown in FIG. It is the schematic of the terminal device shown in FIG. FIG. 3 is a schematic diagram illustrating a configuration of a transmitter illustrated in FIG. 2. FIG. 3 is a schematic diagram illustrating a configuration of a receiver illustrated in FIG. 2. FIG. 6 is a schematic diagram illustrating a configuration of a receiver illustrated in FIG. 5. FIG. 6 is a schematic diagram illustrating a configuration of a transmitter illustrated in FIG. 5. FIG. 3 is a schematic diagram of the assignment device shown in FIG. 2. FIG. 4 is a diagram illustrating a relationship between a signal-to-noise power ratio SINR _{OFDM of OFDM} , γ, and a signal-to-noise power ratio SINR ′ _OFDM due to OFDM interference. FIG. 4 is a conceptual diagram illustrating an example of frequency band allocation. 6 is a flowchart for explaining an operation of allocating transmission power in an allocating unit. It is a conceptual diagram of a frequency band.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding portions have the same reference characters allotted, and description thereof will not be repeated.

  FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention. With reference to FIG. 1, a wireless communication system 10 according to an embodiment of the present invention includes a base station 1 and terminal devices 2 to 6.

  Base station 1 and terminal devices 2 to 6 are arranged in a wireless communication space. More specifically, the terminal devices 2 to 6 are arranged within the communication range REG of the base station 1.

  The base station 1 performs wireless communication with the terminal devices 2 to 4 using GFDM, performs wireless communication with the terminal devices 2 to 4 using GFDM and OFDM simultaneously, and performs terminal communication using OFDM. Wireless communication is performed with the devices 2 to 4.

  Then, the base station 1 allocates power and frequency used by the terminal devices 2 to 4 that perform wireless communication using GFDM by a method described later.

  Each of the terminal devices 2 to 4 performs wireless communication with the base station 1 using GFDM, performs wireless communication with the base station 1 using GFDM and OFDM simultaneously, and uses the OFDM to perform base communication. Wireless communication is performed with the station 1. Therefore, each of the terminal devices 2 to 4 is referred to as a “5G terminal”.

  Each of the terminal devices 5 and 6 performs wireless communication with the base station 1 using OFDM. Therefore, each of the terminal devices 5 and 6 is referred to as a “4G terminal”.

  OFDM is a wireless communication system using orthogonal multicarriers, and GFDM is a wireless communication system using non-orthogonal multicarriers.

  FIG. 2 is a schematic diagram of the base station 1 shown in FIG. Referring to FIG. 2, base station 1 includes an antenna 11, a receiver 12, a transmitter 13, a transmitting / receiving means 14, and a host system 15. The host system 15 includes an assignment device 151.

  The receiver 12 receives from the host system 15 the waveform information IF_WV indicating one of a waveform based on OFDM, a waveform based on GFDM, and a waveform obtained by adding a waveform based on OFDM and a waveform based on GFDM. Further, the receiver 12 receives a radio wave via the antenna 11. Then, the receiver 12 detects received data by a method described later based on the received received radio wave and the waveform information IF_WV, and outputs the detected received data to the host system 15.

  The transmitter 13 hosts the UE category information CTG_4G (or CTG_5G) and an instruction signal INST for instructing any one of wireless communication using OFDM alone, wireless communication using GFDM alone, and wireless communication using OFDM and GFDM simultaneously. Received from system 15. In addition, the transmitter 13 performs subcarrier SC_4G (OFDM subcarrier) for performing wireless communication between the base station 1 and the terminal devices 2 to 6 using OFDM, and performs radio communication between the base station 1 and the terminal devices 2 to 4 using GFDM. A subcarrier SC_5G (GFDM subcarrier) for performing communication is received from the allocation device 151 of the host system 15. Further, the transmitter 13 receives power for performing wireless communication between the base station 1 and the terminal devices 2 to 4 by GFDM from the allocation device 151 of the host system 15. Further, the transmitter 13 receives transmission data from the host system 15.

  Then, based on the UE category information CTG_4G (or CTG_5G), the transmitter 13 performs wireless communication between the base station 1 and the terminal devices 2 to 4 or performs wireless communication between the base station 1 and the terminal devices 5 and 6 It is determined whether it is performed.

  When it is determined that wireless communication is performed between the base station 1 and the terminal devices 2 to 4, the transmitter 13 modulates transmission data into transmission symbols according to an instruction signal INST for performing wireless communication using GFDM alone. Then, the modulated transmission symbol is converted into a frequency / time domain data block structure corresponding to the subcarrier SC_5G, and distributed to a group of subcarriers SC_5G. GFDM processing for sequentially executing the inverse Fourier transform of the size to be performed is performed, and the signals subjected to the inverse Fourier transform are simultaneously transmitted via the antenna 11.

  When it is determined that wireless communication is performed between the base station 1 and the terminal devices 2 to 4, the transmitter 13 transmits transmission data in accordance with an instruction signal INST for performing wireless communication using OFDM alone. , And converts the modulated transmission symbol into a frequency-time domain data block structure corresponding to the subcarrier SC_4G and distributes the group to the subcarrier SC_4G. An OFDM process for performing an inverse Fourier transform of the size is performed, and the signals subjected to the inverse Fourier transform are transmitted simultaneously via the antenna 11.

  Further, when it is determined that wireless communication is performed between the base station 1 and the terminal devices 2 to 4, the transmitter 13 responds to an instruction signal INST for performing wireless communication using OFDM and GFDM simultaneously. The GFDM processing and the OFDM processing are performed in parallel, and the signal obtained by the GFDM processing and the signal obtained by the OFDM processing are added and transmitted via the antenna 11.

  On the other hand, when it is determined that wireless communication is performed between the base station 1 and the terminal devices 5 and 6, the transmitter 16 performs an OFDM process and simultaneously transmits the inverse Fourier-transformed signals via the antenna 11. .

  The transmission / reception means 14 holds the control channel Ch_CTL in advance. Then, the transmitting / receiving means 14 performs subcarrier SC_4G (OFDM subcarrier) for performing radio communication between the base station 1 and the terminal devices 2 to 6, and performs radio communication between the base station 1 and the terminal devices 2 to 4 by GFDM. Assignment information IF_ALLC indicating assignment of subcarrier SC_5G (GFDM subcarrier) to perform and power for performing wireless communication by GFDM is received from assignment apparatus 151 of host system 15. Then, the transmission / reception unit 14 transmits the allocation information IF_ALLC to the terminal devices 2 to 6 via the antenna 11 using the control channel Ch_CTL.

  The transmission / reception means 14 receives a channel allocation request (channel allocation request) used for wireless communication from the base station 1 to the terminal devices 2 to 6 from the terminal devices 2 to 6 using the control channel Ch_CTL. It outputs the received channel assignment request to the host system 15.

  The host system 15 outputs the waveform information IF_WV to the receiver 12. Further, the host system 15 receives received data from the receiver 12. Further, the host system 15 receives the UE category information CTG_4G and CTG_5G from the receiver 12. Further, the host system 18 receives a channel assignment request from the transmission / reception unit 14. Further, the host system 18 generates transmission data.

  Then, the host system 15 outputs the UE category information CTG_4G (or CTG_5G) and transmission data to the transmitter 13. Further, the host system 15 outputs the UE category information CTG_4G, CTG_5G and the channel assignment request to the assignment device 151.

  The allocating device 151 holds a system frequency band BW, which is a frequency band used in the wireless communication system 10, in advance. The allocating device 151 receives the UE category information CTG_4G, CTG_5G and a channel allocation request from the host system 15. Then, when receiving the channel allocation request, the allocation device 151 counts the number of 4G terminals and the number of 5G terminals based on the UE category information CTG_4G and CTG_5G. Subsequently, based on the number of 4G terminals and the number of 5G terminals, the allocating device 151 uses the method described below to perform subcarriers SC_5G and SC_4G for the terminal devices 2 to 4 and the terminal devices 5 and 6 to perform wireless communication. Assign.

  In addition, the allocation device 151 determines the power P_GFDM for the terminal devices 2 to 4 to perform wireless communication by GFDM by a method described later.

  Then, allocating apparatus 151 outputs subcarriers SC_5G and SC_4G to transmitter 13. The allocating device 151 also generates allocation information IF_ALLC indicating the allocated subcarriers SC_5G and SC_4G and the power P_GFDM, and outputs the generated allocation information IF_ALLC to the transmission / reception unit 14.

  FIG. 3 is a schematic diagram of the terminal device 2 shown in FIG. Referring to FIG. 3, terminal device 2 includes an antenna 21, a receiver 22, a transmitter 23, and a host system 24.

  The receiver 22 holds the control channel Ch_CTL in advance. Then, the receiver 22 receives the allocation information IF_ALLC via the antenna 21 on the control channel Ch_CTL, and outputs the received allocation information IF_ALLC to the host system 24.

  The receiver 22 receives the waveform information IF_WV from the host system 24. In addition, the receiver 22 receives, via the antenna 21, a radio wave of OFDM alone, a radio wave of GFDM alone, or a radio wave when both OFDM and GFDM are used at the same time. Then, the receiver 22 detects received data based on the received received radio wave and the waveform information IF_WV by a method described later, and outputs the detected received data to the host system 24.

  Transmitter 23 receives allocation information IF_ALLC, waveform information IF_WV, power P_GFDM, and transmission data from host system 24. Then, the transmitter 23 generates a transmission signal based on the allocation information IF_ALLC, the transmission data and the waveform information IF_WV, by any of the OFDM only method, the GFDM only method, and the method using both OFDM and GFDM simultaneously, The generated transmission signal is transmitted with power P_GFDM via the antenna 21.

  More specifically, when the waveform information IF_WV indicates a waveform according to the GFDMA-only method, the transmitter 23 executes the above-described GFDM processing and simultaneously transmits the inverse Fourier-transformed signals via the antenna 21.

  When the waveform information IF_WV indicates a waveform according to the OFDM only method, the transmitter 23 executes the above-described OFDM processing, and simultaneously transmits the inverse Fourier-transformed signals via the antenna 21.

  Further, when the waveform information IF_WV indicates a waveform when both OFDM and GFDM are used at the same time, the transmitter 23 executes the GFDM process and the OFDM process in parallel, and performs a signal obtained by the GFDM process and the OFDM process. The obtained signals are added and transmitted via the antenna 21.

Further, the transmitter 23 receives the UE category information CTG_5G from the host system 24 and transmits the received UE category information CTG_5G via the antenna 21.

  Further, the transmitter 23 receives the channel allocation request from the host system 24 and transmits the received channel allocation request via the antenna 21.

  The host system 24 receives the allocation information IF_ALLC and the received data from the receiver 22.

  The host system 24 generates transmission data. Then, the host system 24 generates the waveform information IF_WV indicating the waveform of the OFDM only method when transmitting the transmission data by the OFDM only method, and generates the waveform information IF_WV using the GFDM only method when transmitting the transmission data by the GFDM only method. When the transmission data is transmitted using OFDM and GFDM simultaneously, the waveform information IF_WV indicating the waveform obtained by adding the waveform based on the OFDM only method and the waveform based on the GFDM only method is generated.

  Then, the host system 24 outputs the waveform information IF_WV to the receiver 22. Further, the host system 24 outputs the transmission data, the waveform information IF_WV, and the assignment information IF_ALLC to the transmitter 23.

  Note that the terminal devices 3 and 4 shown in FIG. 1 have the same configuration as the terminal device 2 shown in FIG.

  FIG. 4 is a schematic diagram of the terminal device 5 shown in FIG. Referring to FIG. 4, terminal device 5 includes an antenna 51, a receiver 52, a transmitter 53, and a host system 54.

  The receiver 52 holds the control channel Ch_CTL in advance. Then, the receiver 52 receives the allocation information IF_ALLC via the antenna 51 on the control channel Ch_CTL, and outputs the received allocation information IF_ALLC to the host system 54.

  Further, the receiver 52 receives a radio wave based on the OFDM only method via the antenna 51, detects received data by a method described later based on the received radio wave, and sends the detected received data to the host system 54. Output.

  Transmitter 53 receives assignment information IF_ALLC and transmission data from host system 54. Then, the transmitter 53 modulates the transmission data in the subcarrier SC_4G indicated by the allocation information IF_ALLC by the OFDM only method and transmits the modulated data. More specifically, the transmitter 53 performs the above-described OFDM processing, and simultaneously transmits the inverse Fourier-transformed signals via the antenna 51.

  Further, the transmitter 53 transmits the UE category information CTG_4G via the antenna 51.

  The host system 54 receives the allocation information IF_ALLC and the received data from the receiver 52.

  The host system 54 outputs the UE category information CTG_4G to the transmitter 53.

  The host system 54 generates transmission data. Then, the host system 54 outputs the transmission data and the allocation information IF_ALLC to the transmitter 53.

  Note that the terminal device 6 shown in FIG. 1 has the same configuration as the terminal device 5 shown in FIG.

  FIG. 5 is a schematic diagram showing the configuration of the transmitter 13 shown in FIG. Referring to FIG. 5, transmitter 13 includes a symbol mapper 131, a resource scheduler 132, a waveform allocating unit 133, transmission processing units Unit_5G_T1, Unit_4G_T1, an adder 144, a DA converter 145, and a radio unit 146. And

  The transmission processing unit Unit_5G_T1 performs transmission processing by GFDM. The transmission processing unit Unit_5G_T1 includes a serial / parallel converter 134, upsampling processing units 135-1 to 135-K (K is an integer of 1 or more), waveform shaping filters 136-1 to 136-K, It includes carrier up converters 137-1 to 137-K, adder 138, and guard interval inserter 139.

  The transmission processing unit Unit_4G_T1 performs transmission processing by OFDM. Then, the transmission processing unit Unit_4G_T1 includes a serial / parallel converter 140, an IFFT 141, a parallel / serial converter 142, and a guard interval inserter 143.

  The symbol mapper 131 receives the code information bits from the host system 15 and modulates the received code information bits into a transmission symbol composed of complex data. Then, symbol mapper 131 outputs the modulated transmission symbol to waveform allocating section 133.

  The resource scheduler 132 receives the UE category information CTG_5G (or CTG_4G) and the instruction signal INST from the host system 15. The resource scheduler 132 generates one of the instruction signal INT_5G, the instruction signal INT_4G and the instruction signal INST_5G + 4G based on the UE category information CTG_5G (or CTG_4G) and the instruction signal INST, and generates the generated instruction signal INT_5G, instruction signal INT_4G and One of instruction signals INST — 5G + 4G is output to waveform allocating section 133.

  The instruction signal INT_5G is an instruction signal for instructing wireless communication using the GFDM only method, the instruction signal INT_4G is an instruction signal for instructing wireless communication using the OFDM only method, and the instruction signal INT_5G + 4G is for simultaneously using GFDM and OFDM. This is an instruction signal for instructing wireless communication.

  In this case, the resource scheduler 132 generates the instruction signal INT_5G when the UE category information is the UE category information CTG_5G and the instruction signal INST instructs wireless communication using the GFDM-only scheme. Further, the resource scheduler 132 generates the instruction signal INT_5G + 4G when the UE category information is the UE category information CTG_5G and the instruction signal INST indicates wireless communication using GFDM and OFDM simultaneously. Further, the resource scheduler 132 generates the instruction signal INT_4G when the UE category information is the UE category information CTG_4G and the instruction signal INST indicates wireless communication using the OFDM only method.

  Waveform allocating section 133 receives a transmission symbol from symbol mapper 131 and receives one of instruction signal INT_5G, instruction signal INT_4G, and instruction signal INT_5G + 4G from resource scheduler 132. When receiving instruction signal INT_5G, waveform allocating section 133 outputs the transmission symbol to serial-parallel converter 134, and when receiving instruction signal INT_4G, outputs the transmission symbol to serial-parallel converter 140, and outputs instruction signal INT_5G + 4G. When received, the transmission symbol is divided into transmission symbol SYB_5G transmitted on subcarrier SC_5G and transmission symbol SYB_4G transmitted on subcarrier SC_4G, and divided transmission symbol SYB_5G is output to serial / parallel converter 134 and the divided transmission The symbol SYB_4G is output to the serial / parallel converter 140.

  Serial / parallel converter 134 receives the transmission symbols from waveform allocating section 133, and distributes the received transmission symbols to K subcarriers and M (M is an integer of 1 or more) time slots. The data distributed in this manner is represented by the following equation (1) by the block structure.

Here, the transmission symbol d _k [m] of the complex number data is a data symbol transmitted in the m-th time slot on the k-th (k is an integer satisfying 1 ≦ k ≦ K) sub-carrier.

  Therefore, in the transmission processing unit Unit_5G_T1, K similar processing systems are configured for each subcarrier.

Focusing on such a k-th processing system of the transmission processing unit Unit_5G_T1, the transmission symbol d _k [m] (m = 0, 1,..., M−1) of the complex data is converted into an up-sampling processing unit 135- The signal is upsampled N times by k and converted into a signal represented by the following equation (2).

  Here, δ [•] is a Dirac function.

  Therefore, the following equation (3) holds.

Subsequently, the waveform shaping filter 136-k converts the pulse shaping filter g [n] (n = 0, 1,..., (LN-1)) having a filter length L (≦ M) into the data sequence d ^N _k. Applies to [n].

  Here, a decrease in the transmission rate due to filtering is avoided by a tail-biting technique described in the following Reference 1 and subsequent digital subcarrier up-conversion.

Known Document 1: G. Fettweis, M. Krondorf, and S. Bittner, "Gfdm-Generalized Freq
uency Division Multiplexing, ”in Vehicular Technology Conference, 2009. VTC Spr
ing 2009 IEEE 69th, april 2009, pp. 1-4.
Therefore, the subcarrier transmission signal x _k [n] output from the subcarrier upconverter 137-k can be represented by the following equation (4).

Here, the symbol X in circles indicates a cyclic convolution, and w ^kn is represented by the following equation (5).

  N is an up-sampling factor required for each pulse waveform of the subcarrier. In this embodiment, N = K.

Similarly to Expression (1), the transmission signal x _k [n] can be represented by a block structure as shown in Expression (6).

  Thereafter, the adder 138 adds all the subcarrier signals to generate a transmission signal of the data block D as in the following equation (7).

  Then, the adder 138 outputs the transmission signal of the data block D represented by Expression (6) to the guard interval inserter 139.

  The guard interval inserter 139 inserts a guard interval into the transmission signal of the data block D and outputs it to the adder 144.

  The serial / parallel converter 140 receives the transmission symbol from the waveform allocating unit 133, performs serial / parallel conversion on the received transmission symbol, and outputs a parallel series of transmission symbols to the IFFT 141.

  The IFFT 141 receives the transmission symbol of the parallel sequence from the serial / parallel converter 140 and performs inverse fast Fourier transform on the received transmission symbol of the parallel sequence. Then, the IFFT 141 outputs the parallel-sequence transmission symbols subjected to the inverse fast Fourier transform to the parallel-serial converter 142.

  The parallel-serial converter 142 receives the transmission symbol of the parallel sequence from the IFFT 141, performs parallel-serial conversion on the received transmission symbol of the parallel sequence, and outputs the transmission symbol of the serial sequence to the guard interval inserter 143.

  The guard interval inserter 143 receives a serial sequence transmission symbol from the parallel-serial converter 142, and inserts a guard interval into the received serial sequence transmission symbol to generate a transmission signal. Then, guard interval inserter 143 outputs the transmission signal to adder 144.

  Adder 144 receives the transmission signals from guard interval inserter 139 and guard interval inserter 143, and adds the two received transmission signals. In this case, when the adder 1844 receives the transmission signal only from the guard interval inserter 139, the adder 1844 outputs the transmission signal received from the guard interval inserter 139 to the DA converter 145, and transmits the transmission signal only from the guard interval inserter 143. When receiving the transmission signal from the guard interval inserter 143, the transmission signal received from the guard interval inserter 143 is output to the DA converter 145. And the transmission signal received from guard interval inserter 143, and outputs the addition result to DA converter 145.

  The DA converter 145 receives the transmission signal from the adder 144, converts the received transmission signal from a digital signal to an analog signal, and outputs a transmission signal including the converted analog signal to the wireless unit 146.

  Wireless unit 146 receives a transmission signal from DA converter 145 and receives power P_GFDM from host system 15. Then, wireless unit 146 converts the received transmission signal into a baseband signal, and transmits the converted baseband signal via antenna 11 with power P_GFDM.

  FIG. 6 is a schematic diagram showing the configuration of the receiver 12 shown in FIG. Referring to FIG. 6, receiver 12 includes a wireless unit 121, an AD converter 122, a switch 123, and reception processing units Unit_5G_R1 and Unit_4G_R1.

  The reception processing unit Unit_5G_R1 performs reception processing of a signal transmitted by GFDM. Then, the reception processing unit Unit_5G_R1 includes a guard interval remover 124, an equalizer 125, a channel estimator 126, subcarrier downconverters 127-1 to 127-K, matched filters 128-1 to 128-K, , Downsampling processing units 129-1 to 129-K, a parallel-serial converter 130, a symbol demapper 161 and a decoder 162.

  The reception processing unit Unit_4G_R1 performs reception processing of a signal transmitted by the OFDM method. The reception processing unit Unit_4G_R1 includes a guard interval remover 163, a serial / parallel converter 164, a fast Fourier transformer (FFT) 165, a channel estimator 166, and symbol demappers 167-1 to 167. -J (J is an integer of 1 or more), a parallel-serial converter 168, and a decoder 169.

  The wireless unit 121 receives a radio wave via the antenna 21 and outputs a radio wave (= baseband signal) having the frequency of the baseband signal to the AD converter 122 among the received radio waves.

  The AD converter 122 receives the baseband signal from the wireless unit 121, converts the received baseband signal from an analog signal to a digital signal, and outputs the converted baseband signal to the switch 123.

  The switch 123 includes a switch 1231 and terminals 1232 and 1233. The switch 1231 is connected to the AD converter 122. The terminal 1232 is connected to the guard interval remover 124. The terminal 1233 is connected to the guard interval remover 163.

  The switch 123 receives the baseband signal from the AD converter 122 and receives the waveform information IF_WV from the host system 15.

  When the waveform information IF_WV indicates a waveform based on GFDM, the switch 123 connects the switch 1231 to the terminal 1232 and outputs a baseband signal to the guard interval remover 124 via the terminal 1232.

  When the waveform information IF_WV indicates a waveform based on OFDM, the switch 123 connects the switch 1231 to the terminal 1233 and outputs a baseband signal to the guard interval remover 163 via the terminal 1233.

  Further, when the waveform information IF_WV indicates a waveform when OFDM and GFDM are used at the same time, the switch 123 connects the switch 1231 to both the terminals 1232 and 1233, and outputs the baseband signal via the terminals 1232 and 1233. Output to the guard interval removers 124 and 163, respectively.

  The guard interval remover 124 removes the guard interval from the baseband signal and outputs a signal (= received signal) from which the guard interval has been removed to the equalizer 125 and the channel estimator 126.

  Equalizer 125 receives the received signal from guard interval remover 124 and receives the frequency characteristics of the received signal from channel estimator 126. Then, the equalizer 125 equalizes the received signal based on the frequency characteristics of the propagation channel. After that, the equalizer 125 outputs the equalizer output y [n] to the subcarrier downconverters 127-1 to 127 -K.

  Channel estimator 126 receives the received signal from guard interval remover 124, detects the frequency characteristics of the received signal, and outputs the same to equalizer 125.

  GFDM is a scheme in which transmission data is modulated, the modulated transmission data is divided into a sequence of KM complex data symbols, and each of the divided KM complex data symbols is processed and transmitted simultaneously. Then, this sequence is distributed to K subcarriers and M time slots.

  Subcarrier down converters 127-1 to 127-K are provided corresponding to K subcarriers.

  The subcarrier downconverter 127-k digitally downconverts the received signal y [n] to the corresponding subcarrier, and obtains a subcarrier received signal represented by the following equation (8).

  Then, subcarrier downconverter 127-k outputs the subcarrier received signal to matched filter 128-k.

  Matched filters 128-1 to 128-K are provided corresponding to subcarrier downconverters 127-1 to 127-K, respectively.

  Matched filter 128-k receives the subcarrier received signal from subcarrier downconverter 127-k, and performs a convolution operation on the received subcarrier received signal by receiver matched filter g [n]. The signal after the convolution operation is defined by the following equation (9).

  Accordingly, the processing in the subcarrier downconverter 127-k and the matched filter 128-k are represented by equations (10) and (11), respectively.

  The output of the matched filter 128-k is represented by the above equation (9).

  The down-sampling processing unit 129-k receives the output (= Equation (9)) of the matched filter 128-k, and performs down-sampling on the received output to obtain the down-sampling reception data represented by the following Equation (12). The symbol is obtained.

  This downsampling is a process like the following equation (13).

  The parallel-serial converter 130 receives the K down-sampled received data symbols (Equation (13)) from the down-sampling processing units 127-1 to 127 -K, and converts the received K down-sampled received data symbols into parallel-serial data. After conversion, the converted serial data symbols are output to the symbol demapper 161.

  Symbol demapper 161 receives a serial sequence data symbol from parallel-serial converter 130, extracts a demodulation sequence from the received serial sequence data symbol, and outputs the extracted demodulation sequence to decoder 162.

  Decoder 162 receives the demodulated sequence from symbol demapper 161, and decodes the received sequence to obtain a decoded sequence. Then, the decoder 162 outputs the decoded sequence to the host system 15.

  The guard interval remover 163 receives the baseband signal via the terminal 1233, removes the guard interval from the received baseband signal, and outputs a signal (= received signal) from which the guard interval has been removed to the serial / parallel converter 164. I do.

  The serial / parallel converter 164 receives the received signal from the guard interval remover 163, performs serial / parallel conversion on the received signal, and outputs the converted parallel series received signal to the FFT 165.

  FFT 165 performs fast Fourier transform on the received signal of the parallel sequence, and outputs the converted received signal to symbol demappers 167-1 to 167-J.

  The symbol demappers 167-1 to 167-J output the demodulated sequence to the parallel-serial converter 168 based on the frequency response estimated by the channel estimator 166, and the parallel-serial converter 168 converts the demodulated sequence from parallel to serial. Then, the serial sequence is input to the decoder 169, and the decoder 169 decodes the serial sequence to obtain a decoded sequence.

  The transmitter 23 of each of the terminal devices 2 to 4 has the same configuration as the transmitter 13 shown in FIG. 5, and the receiver 22 of each of the terminal devices 2 to 4 has the same configuration as the receiver 12 shown in FIG.

  FIG. 7 is a schematic diagram showing the configuration of the receiver 52 shown in FIG. Referring to FIG. 7, receiver 52 includes a radio unit 521, an AD converter 522, and a reception processing unit Unit_4G_R1.

  The wireless unit 521 receives a radio wave via the antenna 51 and outputs a radio wave (= baseband signal) having the frequency of the baseband signal to the AD converter 522 among the received radio waves.

  The AD converter 522 receives the baseband signal from the wireless unit 521, converts the received baseband signal from an analog signal to a digital signal, and sends the converted baseband signal to the guard interval remover 163 of the reception processing unit Unit_4G_R1. Output.

  The reception processing unit Unit_4G_R1 is as described in FIG.

  FIG. 8 is a schematic diagram showing the configuration of the transmitter 53 shown in FIG. Referring to FIG. 8, transmitter 53 includes a symbol mapper 131, a transmission processing unit Unit_4G_T1, a DA converter 145, and a radio unit 146.

  The symbol mapper 131 receives the code information bits from the host system 54 and modulates the received code information bits into a transmission symbol composed of complex data. Then, the symbol mapper 131 outputs the modulated transmission symbol to the serial / parallel converter 140 of the transmission processing unit Unit_4G_T1.

  The transmission processing unit Unit_4G_T1 receives the modulated transmission symbol from the symbol mapper 131, performs OFDM processing on the received transmission symbol by the above-described method, and outputs the transmission signal subjected to the OFDM processing to the DA converter 145.

  The DA converter 145 converts the transmission signal from a digital signal to an analog signal, and outputs the converted transmission signal to the wireless unit 146.

  The wireless unit 146 transmits the transmission signal received from the DA converter 145 via the antenna 51.

  FIG. 9 is a schematic diagram of the allocation device 151 shown in FIG. Referring to FIG. 9, allocating device 151 includes calculating means 1511 and allocating means 1512.

The signal energy Eb per bit in the baseband signal is known. Therefore, the host system 15 holds the signal energy Eb. The host system 15 counts the number of bits _{Nb _OFDM} per modulation symbol, and a bit number _{Nb _GFDM} per modulation symbol upon modulating a baseband signal by GFDM when the modulating baseband signal by OFDM.

Then, the host system 15 outputs the signal energy Eb and the number of bits _{Nb_OFDM} and _{Nb_GFDM} to the arithmetic unit 1511.

The calculating unit 1511 receives the signal energy Eb, the number of bits _{Nb_OFDM} , and the number of bits _{Nb_GFDM} from the host system 15.

The calculation means 1511 calculates the energy E _SO per modulation symbol of OFDM by multiplying the signal energy Eb by the number of bits _{Nb_OFDM} . The calculating means 1511 calculates the energy E _SG per modulation symbol of GFDM by multiplying the signal energy Eb by the number of bits _{Nb_GFDM} .

The computing means 1511 calculates the ratio _{γ = E} SG _/ E _SO energy _{E SG} to the energy _{E SO.}

Thereafter, the calculating means 1511 calculates the mutual interference cγ ₌ cE SG _{/ E SO} by multiplying the correlation coefficient c to γ _{= E} SG _/ E _SO.

The calculating unit 1511 calculates the required E _SO / N _O = x of the OFDM addressed to the 4G terminal. _{Here, N} O is the noise power in OFDM.

Then, the arithmetic unit 1511 outputs the interference cγ ₌ cE SG _{/ E SO,} and _{x =} E SO / _{N O} to allocation unit 1512.

Allocation means 1512 receives the interference cγ ₌ cE SG _{/ E SO,} and _{x =} E SO / _{N O} from the operation unit 1511.

The signal-to-noise power ratio SINR _{OFDM in OFDM} is represented by the following equation (14).

The allocating unit 1512 determines the energy E _SG so that the signal-to-noise power ratio SINR _OFDM satisfies Expression (15), that is, satisfies Expression (16).

In this case, the allocating unit 1512 determines the energy E _SG so that the energy E _SO and N _O are known, and the correlation coefficient c is a constant, and the expression (16) is satisfied. Then, the allocating unit 1512 allocates the determined energy E _SG as the transmission power P_GFDM of the terminal devices 2 to 4 that are 5G terminals.

Moreover, assignment section 1512, so that the frequency interval between the frequency band of the OFDM frequency band and GFDM is Delta] f _G, allocates the subcarrier SC_5G of OFDM subcarriers SC_4G and GFDM.

  Then, allocating means 1512 generates allocation information IF_ALLC including OFDM subcarrier SC_4G, GFDM subcarrier SC_5G, and transmission power P_GFDM, and outputs the generated allocation information IF_ALLC to transmitting / receiving means 14.

FIG. 10 is a diagram illustrating the relationship between the signal-to-noise power ratio SINR _{OFDM of OFDM} , γ, and the signal-to-noise power ratio SINR ′ _OFDM due to OFDM interference.

FIG. 10 shows the relationship between the signal-to-noise power ratio SINR _OFDM of OFDM when the correlation coefficient c is 0.2, γ, and the signal-to-noise power ratio SINR ′ _OFDM due to OFDM interference.

Referring to FIG. 10, when the signal-to-noise power ratio SINR _OFDM = x of _OFDM is in the range of −7 to 4, the range that γ can take is 1 to 0.0625. Since at γ _{= E} SG _/ E _SO, the gamma decreases, the energy _{E SG,} i.e., transmission power P_GFDM terminal device 2-4 is decreased.

Therefore, the allocating unit 1512 determines the energy E _SG , that is, the transmission power P_GFDM of the terminal devices 2 to 4 in a range where γ is as large as possible.

When x = −7 [dB] and γ = 1, the signal-to-noise power ratio SINR _OFDM = x ′ due to OFDM interference is −7.2 [dB]. When wireless communication is performed with transmission power P_GFDM in a range where 4 satisfies γ = 1, interference given to terminal devices 5 and 6 as 4G terminals is 0.2 [dB].

In addition, when x = −2 [dB] and γ = 0.5, the signal-to-noise power ratio SINR _OFDM = x ′ due to OFDM interference is −2.3 [dB], so that it is a 5G terminal. When the terminal devices 2 to 4 perform wireless communication with the transmission power P_GFDM in a range satisfying γ = 0.5, interference given to the terminal devices 5 and 6 as 4G terminals is 0.3 [dB].

  The same applies to the case where x is any other value.

  Therefore, from the results shown in FIG. 10, when the terminal devices 2 to 4 as 5G terminals perform wireless communication with the transmission power P_GFDM in a range satisfying γ, the interference given to the terminal devices 5 and 6 as 4G terminals is 0. It was found that it could be suppressed to 0.1 to 0.3 [dB].

  As a result, it is found that when the terminal devices 5 and 6 are performing wireless communication by OFDM, even if the terminal devices 2 to 4 perform wireless communication with the transmission power P_GFDM, interference given to the terminal devices 5 and 6 can be suppressed. Was.

When x increases, it means that the signal-to-noise power ratio SINR _{OFDM of OFDM} increases. Therefore, when x increases, γ decreases and transmission power P_GFDM must be suppressed. That is, when the terminal devices 5 and 6 are performing wireless communication in an environment with good communication characteristics using OFDM, the terminal devices 2 to 4 must perform wireless communication while suppressing the transmission power P_GFDM. I do.

  FIG. 11 is a conceptual diagram illustrating an example of frequency band allocation. Referring to FIG. 11, OFDM transmission symbols are entirely dispersed in the OFDM frequency band.

  In such a case, the allocating unit 1512 may allocate the GFDM frequency band to a higher frequency side than the OFDM frequency band (see (a) of FIG. 11), and the GFDM frequency band to a lower frequency side than the OFDM frequency band. (See FIG. 11 (b)).

  Further, when the OFDM transmission symbols are arranged on one side (for example, the low frequency side) of the OFDM frequency band, the allocating unit 1512 allocates the GFDM frequency band to a higher frequency side than the OFDM frequency band. assign.

  On the other hand, when the OFDM transmission symbols are arranged on the other side of the OFDM frequency band (for example, on the high frequency side), the allocating unit 1512 assigns the GFDM frequency band to a lower frequency side than the OFDM frequency band. assign.

  By doing so, interference from the terminal devices 2 to 4 to the terminal devices 5 and 6 can be suppressed, so that the transmission power P_GFDM of the terminal devices 2 to 4 can be set higher.

  FIG. 12 is a flowchart for explaining the operation of allocating transmission power in allocation section 1512.

  Referring to FIG. 12, when the operation of allocating transmission power P_GFDM is started, allocating means 1512 selects another user (step S1). Then, the allocating unit 1512 determines whether or not the other user is a 5G user (Step S2). In this case, the allocating unit 1512 determines whether or not another user is a 5G user based on the category information CTG_4G (or CTG_5G). When the category information is CTG_4G, the allocating unit 1512 determines that the other user is not a 5G user, and when the category information is CTG_5G, the allocating unit 1512 determines that the other user is a 5G user.

In step S2, when the other user is determined not to be 5G user, allocating means 1512 calculates the interference _cE SG _{/ E SO} by the above-described method (step _{S3), 1 / x = N} O / E SO Is calculated (step S4). N _O / E _SO is the reciprocal of the signal-to-noise power ratio of OFDM.

Thereafter, allocating means 1512 determines energy E _SG (= transmission power P_GFDM) such that the mutual interference is sufficiently smaller than the inverse of the signal-to-noise power ratio of OFDM (= 1 / x = N _O / E _SO ). (Step S5).

Here, that the mutual interference is sufficiently smaller than the reciprocal of the signal-to-noise power ratio of OFDM (= 1 / x = N _O / E _SO ) means that, for example, as shown in FIG. It means that the noise power ratio x 'is in the range of about 0.1 to 0.3 dB.

  Then, in step S2, when it is determined that the user is a 5G user, or after step S5, a series of operations ends.

  In step S2, the reason for terminating when it is determined that the user is a 5G user is that there is no need to adjust the transmission power P_GFDM because no interference occurs if the other user is a 5G user. It is.

  As described above, in the embodiment of the present invention, when the terminal devices 5 and 6 that are 4G terminals and the terminal devices 2 and 4 that are 5G terminals perform wireless communication, the terminal devices 2 to 4 and the terminal device The transmission powers P_GFDM and the frequencies of the terminal devices 2 to 4 are allocated such that mutual interference with 5, 6 becomes sufficiently smaller than the reciprocal of the signal-to-noise power ratio of OFDM.

  Therefore, the powers and frequencies of the terminal devices 2 to 4 can be allocated so as to suppress mutual interference.

  In the above description, the allocation of the transmission power P_GFDM and the frequency has been described assuming that the correlation coefficient c is fixed. However, in the embodiment of the present invention, the correlation coefficient c is not limited to this, and the correlation coefficient c is changed. Is also good.

FIG. 13 is a conceptual diagram of a frequency band. Referring to FIG. 13, when the OFDM frequency band and the GFDM frequency band are in a normal arrangement, the frequency interval between the OFDM frequency band and the GFDM frequency band is Δf _G (see (a)). ).

  The allocating unit 1512 changes the correlation coefficient c according to the 5G user. More specifically, for a certain 5G user, the allocating unit 1512 performs higher-order modulation on transmission symbols arranged in a frequency band on the opposite side to the OFDM frequency band in the GFDM frequency band, and Correlation coefficient c is set low so that transmission symbols arranged on the frequency band side are modulated in the lower order (see FIG. 13B), and transmission power P_GFDM and frequency are determined.

Moreover, assignment section 1512, with respect to another 5G user, set a low correlation coefficient c as a frequency interval Delta] f is larger than the frequency interval Delta] f _G between the frequency band of the OFDM frequency band and GFDM (See (c) of FIG. 13), and determines the transmission power P_GFDM and the frequency. The correlation coefficient c changes according to the frequency interval Δf, and decreases as the frequency interval Δf increases, and increases as the frequency interval Δf decreases.

If the correlation coefficient c decreases from c ₁ to c ₂ , the energy E _SG (= transmission power P_GFDM) satisfying the expression (16) becomes larger than the energy E _{SG_c1} when the correlation coefficient c is c _1. obtain. As a result, the transmission power P_GFDM allocated to the terminal devices 2 to 4 can be further increased.

  As shown in FIG. 13 (c), when the frequency interval Δf is increased, the frequency use efficiency is reduced. However, in the embodiment of the present invention, the frequency interval Δf is not always increased, but is increased to a certain 5G. Since the frequency interval Δf is increased only for the user, the frequency use efficiency does not decrease when considering wireless communication as a whole.

  The allocating unit 1512 calculates the ratio between the 4G terminal and the 5G terminal, and changes the correlation coefficient c according to the calculated ratio.

For example, the allocation unit 1512, when allocation of 5G terminal is greater than 0.5, the correlation coefficient c is set smaller than the standard value _{c 0,} and determines the transmission power P_GFDM, allocation of 5G terminals 0.5 If it is less than or equal to, the correlation coefficient c is set to the standard value c ₀ or more, and the transmission power P_GFDM is determined.

  Thus, in the embodiment of the present invention, the correlation coefficient c may be changed according to the 5G user. As a result, it is possible to solve the problem that the transmission power P_GFDM of the 5G user can be kept low, which is a problem when the correlation coefficient c is fixed.

  In the embodiment of the present invention, the operation of allocation device 151 may be realized by software.

  In this case, the allocating device 151 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). Then, the ROM stores a program Prog including the steps of the flowchart shown in FIG.

  The CPU reads the program Prog from the ROM, executes the read program Prog, and allocates the transmission power P_GFDM and the frequency of the 5G user.

  In addition, the program Prog may be recorded on a recording medium such as a CD or a DVD and distributed. When the recording medium on which the program Prog is recorded is mounted on the computer, the computer reads the program Prog from the recording medium, executes the program Prog, and allocates the transmission power P_GFDM and the frequency of the 5G user.

  Therefore, the recording medium on which the program Prog is recorded is a computer-readable recording medium.

  In the above description, the GFDM was used as the non-orthogonal multi-carrier wireless communication method. However, the present invention is not limited to this, and the non-orthogonal multi-carrier wireless communication method is FBMC (Filter Bank Multi-carrier). -Carrier) or UFMC (Universal Filtered Multi-Carrier), and any wireless communication method may be used as long as it is a non-orthogonal multicarrier.

  Further, in the above description, a case has been described where the wireless communication system of the orthogonal multicarrier system (OFDM) and the wireless communication system of the non-orthogonal multicarrier system (GFDM) coexist, but in the embodiment of the present invention, However, the present invention is not limited to this. When the first wireless communication method and the second wireless communication method, which is a wireless communication method for the next generation than the first wireless communication method, coexist, the allocating unit 1512 uses the second wireless communication method. The transmission power and the frequency may be allocated to the terminal device that performs the wireless communication by the wireless communication method by the above-described method.

  Therefore, the allocating device according to the embodiment of the present invention includes a first terminal device that performs wireless communication according to the first wireless communication method and a second terminal device that is a next-generation wireless communication method that is more advanced than the first wireless communication method. An allocation device that allocates power and frequency used by a second terminal device in a wireless communication environment in which a second terminal device that performs wireless communication according to the first wireless communication method is used. When calculating the mutual interference obtained by multiplying the ratio of the energy per modulation symbol in the channel in the second wireless communication system to the energy per modulation symbol by a correlation coefficient, and performing wireless communication using the first wireless communication system Calculating means for calculating the reciprocal of the signal-to-noise power ratio so that mutual interference is sufficiently smaller than the reciprocal of the signal-to-noise power ratio The second terminal device has only to an allocation means for allocating power and frequency to use.

  Further, a program to be executed by a computer according to an embodiment of the present invention includes a first terminal device that performs wireless communication according to a first wireless communication method, and a next-generation wireless communication device that is more than the first wireless communication method. A program for causing a computer to execute allocation of power and frequency used by a second terminal device in a wireless communication environment in which a second terminal device performing wireless communication according to a second wireless communication method is mixed. A first terminal device that performs wireless communication according to a first wireless communication method, and a second terminal device that performs wireless communication according to a second wireless communication method that is a wireless communication method for the next generation than the first wireless communication method. A program for causing a computer to execute the allocation of power and frequency used by the second terminal device in a wireless communication environment in which the second terminal device is mixed. The computing means computes mutual interference obtained by multiplying the ratio of the energy per modulation symbol in the channel in the second wireless communication system to the energy per modulation symbol in the channel in the first wireless communication system by a correlation coefficient. And a first step of calculating the reciprocal of the signal-to-noise power ratio when performing wireless communication by the first wireless communication method, and the allocating means is configured such that the mutual interference is sufficiently larger than the reciprocal of the signal-to-noise power ratio. The second step of allocating the power and frequency used by the second terminal device so as to reduce the size may be performed by the computer.

  The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description of the embodiments, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is applied to an assignment device, a program to be executed by a computer, and a computer-readable recording medium recording the program.

  1 base station, 2 to 6 terminal devices, 10 wireless communication system, 11, 21, 51 antenna, 12, 22, 52 receiver, 13, 23, 53 transmitter, 14 transceiver, 15, 24, 54 host system, 121, 146 wireless unit, 122 AD converter, 124 guard interval remover, 125 equalizer, 126 channel estimator, 127-1 to 127-K subcarrier down converter, 128-1 to 128-K matched filter, 129 -1 to 129-K downsampling processing unit, 130, 142 parallel / serial converter, 131 symbol mapper, 132 resource scheduler, 133 waveform allocating unit, 134, 140 serial / parallel converter, 135-1 to 135-K upsampling processing Part, 136-1 to 136-K Waveform shaping filter, 137-1 to 137-K subcarrier upconverter, 138, 144 adder, guard interval inserter 139, 141 IFFT, 143 guard interval inserter, 145 DA converter, 151 allocator, 161 symbol demapper , 162 decoder, 1511 arithmetic means, 1512 allocating means.

Claims (9)

A first terminal device that performs wireless communication according to the first wireless communication method, and a second terminal device that performs wireless communication according to a second wireless communication method that is a wireless communication method for the next generation than the first wireless communication method. An allocating device that allocates power and frequency used by the second terminal device in a wireless communication environment where terminal devices are mixed,
Calculating the mutual interference obtained by multiplying the ratio of the energy per modulation symbol in the channel in the second wireless communication system to the energy per modulation symbol in the channel in the first wireless communication system by a correlation coefficient; Computing means for computing the reciprocal of the signal-to-noise power ratio when performing wireless communication according to one wireless communication method;
Allocating means comprising: allocating means for allocating power and frequency used by the second terminal device such that the mutual interference is sufficiently smaller than a reciprocal of the signal-to-noise power ratio.   The allocating device according to claim 1, wherein the allocating unit allocates the power used by the second terminal device such that the power value decreases as the signal-to-noise power ratio increases.   The allocation device according to claim 1, wherein the calculation unit calculates the mutual interference by reducing the correlation coefficient according to a user of the second terminal device. The first wireless communication system is a quadrature modulation multi-carrier system,
The allocating device according to claim 1, wherein the second wireless communication system is a non-orthogonal multicarrier system. A first terminal device that performs wireless communication according to the first wireless communication method, and a second terminal device that performs wireless communication according to a second wireless communication method that is a wireless communication method for the next generation than the first wireless communication method. A program for causing a computer to execute allocation of power and frequency used by the second terminal device in a wireless communication environment in which the terminal device is mixed,
The calculating means calculates mutual interference obtained by multiplying the ratio of the energy per modulation symbol in the channel in the second wireless communication system to the energy per modulation symbol in the channel in the first wireless communication system by a correlation coefficient. And a first step of calculating a reciprocal of a signal-to-noise power ratio when performing wireless communication according to the first wireless communication method;
Allocating means for causing a computer to execute a second step of allocating power and frequency used by the second terminal device such that the mutual interference is sufficiently smaller than a reciprocal of the signal-to-noise power ratio. program.   The said 2nd step WHEREIN: The said allocation means allocates the power used by the said 2nd terminal device so that a power value may become small as the signal-to-noise power ratio becomes large. Program to be executed by other computers.   7. The computer according to claim 5, wherein in the first step, the calculation unit calculates the mutual interference by reducing the correlation coefficient according to a user of the second terminal device. 8. The program to be executed. The first wireless communication system is a quadrature modulation multi-carrier system,
The program for causing a computer to execute according to any one of claims 5 to 7, wherein the second wireless communication system is a non-orthogonal multicarrier system.   A computer-readable recording medium on which the program according to any one of claims 5 to 8 is recorded.

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