JP2017163320A - Allocation device, program to be executed by computer, computer readable recording medium with program recorded thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adjustment device for allocating power and a frequency of a terminal device in such a manner that mutual interference is suppressed.SOLUTION: An allocation device 151 includes calculation means 1511 and allocation means 1512. The calculation means 1511 calculates mutual interference cE/Efor which a ratio of energy Eper modulation symbol on a channel in GFDM with respect to energy Eper modulation symbol on a channel in OFDM is multiplied by a correlation coefficient (c), and calculates an inverse of a signal-to-noise power ratio in the case where a radio communication is performed by OFDM. The allocation means 1512 allocates power and a frequency to be used by a terminal device which performs a radio communication by GFDM, in such a manner that the mutual interference cE/Ebecomes sufficiently smaller than the inverse of the signal-to-noise power ratio.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an assignment device, a program for causing a computer to execute, and a computer-readable recording medium on which the program is recorded.

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

  In order to shift from the mainstream wireless communication system using OFDM to the next generation wireless communication system, OFDM using orthogonal multicarrier and non-orthogonal multicarrier such as GFDM (Generalized Frequency Division Multiplexing) are mixed. Hybrid multi-carrier is under consideration.

  For example, methods for arranging non-orthogonal multicarriers in the OFDM guard band have been proposed (Non-Patent Documents 1 and 2).

Kanno, et al., “Effects of Mutual Interference in Simultaneous Transmission of OFDM and Advanced Multicarrier,” IEICE Sodai, B-17-19, Mar. 2015. Suzuki, et al., "Theoretical interference characteristics of GFDM for OFDM", IEICE Sodai, B-17-4, Mar. 2016.

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

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

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

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

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

  According to the embodiment of the present invention, the allocating device is a first terminal device that performs wireless communication by the first wireless communication method, and is a wireless communication method for the next generation rather than the first wireless communication method. An allocating 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 using the two wireless communication schemes is mixed. Prepare. The computing means computes 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 the correlation coefficient, The reciprocal of the signal-to-noise power ratio when performing wireless communication by the first wireless communication method is calculated. The assigning means assigns the power and frequency used by the second terminal apparatus so 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 device performs a signal-to-noise power ratio when mutual interference between the first wireless communication scheme and the second wireless communication scheme performs wireless communication by the first wireless communication scheme. The power and frequency used by the second terminal apparatus are allocated so as to be sufficiently smaller than the reciprocal of.

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

  Further, according to the embodiment of the present invention, a program for causing a computer to execute is a first terminal device that performs wireless communication by the first wireless communication method, and a program for the next generation rather than the first wireless communication method. 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 second terminal device that performs wireless communication by the second wireless communication method is a mixed wireless communication method Mutual interference obtained by multiplying the ratio of the energy per modulation symbol in the channel in the second wireless communication system by the correlation coefficient to the energy per modulation symbol in the channel in the first wireless communication system And the reciprocal of the signal-to-noise power ratio when performing wireless communication using the first wireless communication method And a second step in which the assigning means assigns the power and frequency used by the second terminal apparatus so 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 method and the second wireless communication method is sufficiently larger than the reciprocal of the signal-to-noise power ratio when wireless communication is performed by the first wireless communication method. The power and frequency used by the second terminal device are allocated so as to be smaller.

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

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

  It is possible to allocate power and frequency used by the second terminal apparatus that performs wireless communication by the second wireless communication method while suppressing mutual interference.

1 is a schematic diagram of a radio communication system according to an embodiment of the present invention. It is the schematic of the base station shown in FIG. It is the schematic of the terminal device shown in FIG. It is the schematic of the terminal device shown in FIG. It is the schematic which shows the structure of the transmitter shown in FIG. FIG. 3 is a schematic diagram illustrating a configuration of a receiver illustrated in FIG. 2. It is the schematic which shows the structure of the receiver shown in FIG. It is the schematic which shows the structure of the transmitter shown in FIG. It is the schematic of the allocation apparatus shown in FIG. FIG. 5 is a diagram illustrating a relationship between OFDM signal-to-noise power ratio SINR _OFDM , γ, and signal-to-noise power ratio SINR ′ _OFDM due to OFDM interference; It is a conceptual diagram which shows the example of allocation of a frequency band. It is a flowchart for demonstrating the operation | movement which allocates transmission power in an allocation means. 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 parts are denoted by the same reference numerals and description thereof will not be repeated.

  FIG. 1 is a schematic diagram of a radio communication system according to an embodiment of the present invention. Referring 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.

  The base station 1 and the 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 uses OFDM to perform terminal communication Wireless communication is performed with the devices 2 to 4.

  And the base station 1 allocates the electric power and frequency which the terminal devices 2-4 which perform radio | wireless communication using GFDM by the method mentioned 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 simultaneously using GFDM and OFDM, and performs base communication using OFDM. 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. Accordingly, 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. With reference to FIG. 2, the base station 1 includes an antenna 11, a receiver 12, a transmitter 13, a transmission / reception means 14, and a host system 15. The host system 15 includes an allocation device 151.

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

  The transmitter 13 hosts UE category information CTG_4G (or CTG_5G) and an instruction signal INST that instructs one of OFDM, wireless communication using OFDM alone, wireless communication using GFDM alone, and wireless communication using OFDM and GFDM simultaneously. Receive from system 15. Further, the transmitter 13 wirelessly communicates between the base station 1 and the terminal apparatuses 2 to 4 using the subcarrier SC_4G (OFDM subcarrier) for performing wireless communication between the base station 1 and the terminal apparatuses 2 to 6 using OFDM and the GFDM. The subcarrier SC_5G (GFDM subcarrier) for 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 from the allocation device 151 of the host system 15 by GFDM. 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. Determine if it will be done.

  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 in accordance with an instruction signal INST for performing wireless communication by GFDM alone. Then, the modulated transmission symbol is converted into a data block structure in the frequency time domain corresponding to the subcarrier SC_5G and distributed to the group of subcarriers SC_5G, and pulse shaping and correspondence are performed for the plurality of distributed data block structures. GFDM processing for sequentially executing inverse Fourier transforms of the sizes to be performed is performed, and signals subjected to inverse Fourier transform are transmitted simultaneously 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 as transmission symbols in accordance with an instruction signal INST for performing wireless communication based on OFDM alone. The modulated transmission symbol is converted into a frequency-time domain data block structure corresponding to the subcarrier SC_4G and distributed to the group of subcarriers SC_4G. Corresponding to the plurality of distributed data block structures OFDM processing for performing inverse Fourier transform of the size is performed, and the signal subjected to inverse Fourier transform is simultaneously transmitted via the antenna 11.

  Furthermore, 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 the instruction signal INST for performing wireless communication using OFDM and GFDM simultaneously. The GFDM process and the OFDM process are performed in parallel, and the signal obtained by the GFDM process and the signal obtained by the OFDM process 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 OFDM processing and simultaneously transmits an inverse Fourier transformed signal through the antenna 11. .

  The transmission / reception means 14 holds the control channel Ch_CTL in advance. The transmission / reception means 14 performs wireless communication between the base station 1 and the terminal apparatuses 2 to 4 by GFDM and subcarrier SC_4G (OFDM subcarrier) for performing wireless communication between the base station 1 and the terminal apparatuses 2 to 6. Allocation information IF_ALLC indicating allocation between the subcarrier SC_5G (GFDM subcarrier) to be performed and the power to perform wireless communication by GFDM is received from the allocation device 151 of the host system 15. And the transmission / reception means 14 transmits allocation information IF_ALLC to the terminal devices 2-6 via the antenna 11 using control channel Ch_CTL.

  Further, 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, The received channel assignment request is output to the host system 15.

  The host system 15 outputs the waveform information IF_WV to the receiver 12. The host system 15 receives received data from the receiver 12. Furthermore, the host system 15 receives 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 means 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 UE category information CTG_4G, CTG_5G and a channel allocation request to the allocation device 151.

  The allocation device 151 holds in advance a system frequency band BW that is a frequency band used in the wireless communication system 10. Allocation apparatus 151 receives UE category information CTG_4G, CTG_5G and a channel allocation request from host system 15. And the allocation apparatus 151 will count the number of 4G terminals and the number of 5G terminals based on UE category information CTG_4G and CTG_5G, if a channel allocation request | requirement is received. Subsequently, the allocating device 151 uses the subcarriers SC_5G and SC_4G for the terminal devices 2 to 4 and the terminal devices 5 and 6 to perform wireless communication by a method described later based on the number of 4G terminals and the number of 5G terminals. Assign.

  Moreover, the allocation apparatus 151 determines the electric power P_GFDM for the terminal apparatuses 2-4 to perform radio | wireless communication by GFDM by the method mentioned later.

  Then, allocation apparatus 151 outputs subcarriers SC_5G and SC_4G to transmitter 13. Allocation apparatus 151 generates allocation information IF_ALLC indicating allocated subcarriers SC_5G and SC_4G and power P_GFDM, and outputs the generated allocation information IF_ALLC to transmission / reception means 14.

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

  The receiver 22 holds a control channel Ch_CTL in advance. The receiver 22 receives the allocation information IF_ALLC via the antenna 21 in 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. Further, the receiver 22 receives, via the antenna 21, any one of a radio wave by OFDM alone, a radio wave by GFDM alone, and a radio wave when OFDM and GFDM are used simultaneously. Then, the receiver 22 detects reception data by a method described later based on the received reception radio wave and waveform information IF_WV, and outputs the detected reception data to the host system 24.

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

  More specifically, when the waveform information IF_WV indicates a waveform based on the GFDMA single method, the transmitter 23 executes the above-described GFDM processing and simultaneously transmits the inverse Fourier transformed signal via the antenna 21.

  When the waveform information IF_WV indicates a waveform based on the OFDM alone method, the transmitter 23 performs the above-described OFDM processing, and simultaneously transmits the signal subjected to inverse Fourier transform via the antenna 21.

  Further, when the waveform information IF_WV indicates a waveform when OFDM and GFDM are simultaneously used, the transmitter 23 executes the GFDM process and the OFDM process in parallel, and performs the 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 a channel assignment request from the host system 24 and transmits the received channel assignment request via the antenna 21.

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

  The host system 24 generates transmission data. Then, the host system 24 generates waveform information IF_WV indicating a waveform by the OFDM single method when transmitting the transmission data by the OFDM single method, and waveform information IF_WV by the GFDM single method when transmitting the transmission data by the GFDM single method. When transmitting transmission data using OFDM and GFDM simultaneously, waveform information IF_WV indicating a waveform obtained by adding a waveform based on the OFDM only method and a 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 transmission data, waveform information IF_WV, and allocation information IF_ALLC to the transmitter 23.

  1 has 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 in 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 alone method via the antenna 51, detects reception data by a method described later based on the received radio wave, and sends the detected reception data to the host system 54. Output.

  The transmitter 53 receives the allocation information IF_ALLC and transmission data from the host system 54. Then, transmitter 53 modulates the transmission data using sub-carrier SC_4G indicated by allocation information IF_ALLC by the OFDM single method and transmits it. More specifically, the transmitter 53 performs the above-described OFDM processing, and simultaneously transmits the inverse Fourier transformed signal 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 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.

  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, the transmitter 13 includes a symbol mapper 131, a resource scheduler 132, a waveform allocation unit 133, a transmission processing unit Unit_5G_T1, Unit_4G_T1, an adder 144, a DA converter 145, and a radio unit 146. Including.

  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, up-sampling processing units 135-1 to 135-K (K is an integer of 1 or more), waveform shaping filters 136-1 to 136-K, Carrier up converters 137-1 to 137-K, an adder 138, and a guard interval inserter 139 are included.

  The transmission processing unit Unit_4G_T1 performs transmission processing by OFDM. 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 code information bits from the host system 15 and modulates the received code information bits into transmission symbols composed of complex number data. Then, the symbol mapper 131 outputs the modulated transmission symbol to the waveform assignment unit 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. Based on the UE category information CTG_5G (or CTG_4G) and the instruction signal INST, the resource scheduler 132 generates one of the instruction signal INT_5G, the instruction signal INT_4G, and the instruction signal INST_5G + 4G, and the generated instruction signal INT_5G, instruction signal INT_4G, and One of the instruction signals INST_5G + 4G is output to the waveform assignment unit 133.

  The instruction signal INT_5G is an instruction signal for instructing wireless communication by the GFDM single method, the instruction signal INT_4G is an instruction signal for instructing wireless communication by the OFDM single method, and the instruction signal INT_5G + 4G uses GFDM and OFDM simultaneously. 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 UE category information CTG_5G and the instruction signal INST instructs wireless communication by the GFDM single method. Further, the resource scheduler 132 generates the instruction signal INT_5G + 4G when the UE category information is UE category information CTG_5G and the instruction signal INST instructs wireless communication using GFDM and OFDM at the same time. Furthermore, the resource scheduler 132 generates the instruction signal INT_4G when the UE category information is UE category information CTG_4G and the instruction signal INST instructs wireless communication by the OFDM single method.

  The waveform allocation unit 133 receives a transmission symbol from the symbol mapper 131 and receives any of the instruction signal INT_5G, the instruction signal INT_4G, and the instruction signal INT_5G + 4G from the resource scheduler 132. When receiving the instruction signal INT_5G, the waveform allocating unit 133 outputs the transmission symbol to the serial / parallel converter 134. When receiving the instruction signal INT_4G, the waveform allocating unit 133 outputs the transmission symbol to the serial / parallel converter 140 and outputs the instruction signal INT_5G + 4G. Upon receipt, the transmission symbol is divided into a transmission symbol SYB_5G transmitted on the subcarrier SC_5G and a transmission symbol SYB_4G transmitted on the subcarrier SC_4G, and the divided transmission symbol SYB_5G is output to the serial / parallel converter 134, and the divided transmission is performed. The symbol SYB — 4G is output to the serial / parallel converter 140.

  The serial / parallel converter 134 receives the transmission symbol from the waveform allocation unit 133 and distributes the received transmission symbol to K subcarriers and M (M is an integer of 1 or more) time slots. The data distributed in this way is expressed by the following equation (1) by the block structure.

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

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

When attention is paid to 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 number data is the upsampling processing unit 135−. The signal is up-sampled N times by k and converted to a signal expressed by the following equation (2).

  Here, δ [·] is a Dirac function.

  Therefore, the following expression (3) is established.

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, the reduction of the transmission rate due to filtering is avoided by the tail biting technique described in the following known document 1 and the 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 up converter 137-k can be expressed by the following equation (4).

Here, the symbol X in the circle represents a cyclic convolution, and w ^kn is expressed by the following equation (5).

  N is an upsampling factor required for each pulse waveform of the subcarrier, and in this embodiment, N = K.

Similar to Expression (1), the transmission signal x _k [n] can also be expressed by a block structure like the following Expression (6).

  Thereafter, the adder 138 adds all the subcarrier signals to generate a transmission signal of the data block D as shown 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.

  Serial / parallel converter 140 receives transmission symbols from waveform assigning section 133, serial-parallel converts the received transmission symbols, and outputs parallel series transmission symbols to IFFT 141.

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

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

  The guard interval inserter 143 receives a serial series transmission symbol from the parallel-serial converter 142 and inserts a guard interval into the received serial series transmission symbol to generate a transmission signal. Then, the guard interval inserter 143 outputs the transmission signal to the 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 a 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. The transmission signal received from the guard interval inserter 143 is output to the DA converter 145. When the transmission signal is received from both the guard interval inserters 139 and 143, the transmission signal received from the guard interval inserter 139 is received. And the transmission signal received from the guard interval inserter 143 are added, and the addition result is output to the 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 the transmission signal including the converted analog signal to the wireless unit 146.

  The wireless unit 146 receives a transmission signal from the DA converter 145 and receives power P_GFDM from the host system 15. The wireless unit 146 converts the received transmission signal into a baseband signal, and transmits the converted baseband signal via the 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 radio 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 for signals transmitted by GFDM. The reception processing unit Unit_5G_R1 includes a guard interval remover 124, an equalizer 125, a channel estimator 126, subcarrier down converters 127-1 to 127-K, and 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 a reception process on 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 having a baseband signal frequency (= baseband signal) out of the received radio wave to the AD converter 122.

  The AD converter 122 receives a 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. Terminal 1232 is connected to guard interval remover 124. Terminal 1233 is connected to guard interval remover 163.

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

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

  Further, 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 simultaneously, the switch 123 connects the switch 1231 to both the terminals 1232 and 1233 and transmits 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 from which the guard interval has been removed (= received signal) to the equalizer 125 and the channel estimator 126.

  The equalizer 125 receives the received signal from the guard interval remover 124 and receives the frequency characteristic of the received signal from the channel estimator 126. Then, the equalizer 125 equalizes the received signal based on the frequency characteristic of the propagation channel. Thereafter, the equalizer 125 outputs the equalizer output y [n] to the subcarrier down converters 127-1 to 127-K.

  Channel estimator 126 receives the received signal from guard interval remover 124, detects the frequency characteristic of the received signal, and outputs the detected frequency characteristic 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. 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 down converter 127-k digitally downconverts the received signal y [n] to the corresponding subcarrier to obtain a subcarrier received signal represented by the following equation (8).

  Subcarrier down converter 127-k then outputs the subcarrier received signal to matched filter 128-k.

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

  Matched filter 128-k receives a subcarrier received signal from subcarrier down converter 127-k, and performs a convolution operation on the received subcarrier received signal by receiver matched filter g [n]. And the signal after a convolution operation shall be defined by following Formula (9).

  Therefore, the processes in the subcarrier down converter 127-k and the matched filter 128-k are expressed by equations (10) and (11), respectively.

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

  The downsampling processing unit 129-k receives the output (= formula (9)) of the matched filter 128-k, and performs din sampling on the received output, thereby downsampled reception data represented by the following formula (12). A symbol is obtained.

  This downsampling is processing like the following equation (13).

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

  Symbol demapper 161 receives a serial series data symbol from parallel serial converter 130, extracts a demodulated series from the received serial series data symbol, and outputs the extracted demodulated series 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 a 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. To do.

  Serial-parallel converter 164 receives the received signal from guard interval remover 163, serial-parallel converts the received signal, and outputs the converted parallel-sequence received signal to FFT 165.

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

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

  The transmitters 23 of the terminal devices 2 to 4 have the same configuration as the transmitter 13 shown in FIG. 5, and the receivers 22 of the terminal devices 2 to 4 have 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 having a baseband signal frequency (= baseband signal) out of the received radio wave to the AD converter 522.

  The AD converter 522 receives the baseband signal from the radio unit 521, converts the received baseband signal from an analog signal to a digital signal, and converts 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 wireless unit 146.

  The symbol mapper 131 receives code information bits from the host system 54 and modulates the received code information bits into transmission symbols made 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 method described above, and outputs the OFDM-processed transmission signal 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, allocation apparatus 151 includes a calculation unit 1511 and an allocation unit 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 computing means 1511.

The computing means 1511 receives the signal energy Eb, the bit number _{Nb_OFDM} , and the bit number _{Nb_GFDM} from the host system 15.

Calculating means 1511 multiplies the number of bits _{Nb _OFDM} the signal energy Eb, calculates the energy _{E SO} per OFDM modulation symbols. Further, the calculation means 1511 calculates the energy E _SG per modulation symbol of GFDM by multiplying the signal energy Eb by the bit number _{Nb_GFDM} .

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

Thereafter, the calculation means 1511 calculates the mutual interference cγ = cE _SG / E _SO by multiplying γ = E _SG / E _SO by the correlation coefficient c.

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

Then, the calculation unit 1511 outputs the mutual interference cγ = cE _SG / E _SO and x = E _SO / N _O to the allocation unit 1512.

The allocating unit 1512 receives the mutual interference cγ = cE _SG / E _SO and x = E _SO / N _O from the calculating unit 1511.

The signal to noise power ratio SINR _{OFDM in OFDM} is expressed 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 the equation (15), that is, the equation (16).

In this case, the allocating unit 1512 determines the energy E _SG so that the energy E _SO , N _O is known and the correlation coefficient c is a constant to satisfy the equation (16). Then, the allocation unit 1512 allocates the energy _{E SG} that the determined as the transmission power P_GFDM terminal device 2-4 is 5G terminal.

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, allocation 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 transmission / reception means 14.

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

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

Referring to FIG. 10, the possible range of γ is 1 to 0.0625 in the range where the signal-to-noise power ratio SINR _OFDM = x of −7 to 4 in _OFDM . 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 allocation 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 the terminal devices 5 and 6 that are 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], which is a 5G terminal. When the terminal devices 2 to 4 perform wireless communication with transmission power P_GFDM in a range satisfying γ = 0.5, the interference given to the terminal devices 5 and 6 that are 4G terminals is 0.3 [dB].

  The same applies to the case where x is another value.

  Therefore, from the result shown in FIG. 10, when the wireless communication is performed with the transmission power P_GFDM in the range where the terminal devices 2 to 4 which are 5G terminals satisfy γ, the interference given to the terminal devices 5 and 6 which are 4G terminals is 0. It was found that it can be suppressed to 0.1 to 0.3 [dB].

  As a result, when the terminal devices 5 and 6 are performing wireless communication by OFDM, it is understood that 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. It 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. To do.

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

  In such a case, the allocating unit 1512 may allocate the GFDM frequency band to the higher frequency side than the OFDM frequency band (see FIG. 11A), and the GFDM to the lower frequency side than the OFDM frequency band. May be assigned (see FIG. 11B).

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

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

  By doing in this way, since interference from the terminal devices 2 to 4 to the terminal devices 5 and 6 can be suppressed, 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 assigning transmission power in assignment means 1512.

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

When it is determined in step S2 that the other user is not a 5G user, the assigning unit 1512 calculates the mutual interference cE _SG / E _SO by the above-described method (step S3), and 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) so that mutual interference is sufficiently smaller than the reciprocal of the signal-to-noise power ratio of OFDM (= 1 / x = N _O / E _SO ). (Step S5).

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

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

  In step S2, when it is determined that the user is a 5G user, the reason for ending is that if the other user is a 5G user, interference does not occur, and there is no need to adjust the transmission power P_GFDM. 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 to 4 that are 5G terminals perform wireless communication, the terminal devices 2 to 4 and the terminal devices The transmission power P_GFDM and the frequencies of the terminal apparatuses 2 to 4 are allocated so that the mutual interference with the terminals 5 and 6 is sufficiently smaller than the reciprocal of the signal-to-noise power ratio of OFDM.

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

  In the above description, transmission power P_GFDM and frequency allocation have been described on the assumption that correlation coefficient c is fixed. However, the present invention is not limited to this, and correlation coefficient c is changed. 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 normally arranged, the frequency interval between the OFDM frequency band and the GFDM frequency band is Δf _G (see (a)). ).

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

Also, the allocation unit 1512 sets the correlation coefficient c low for another 5G user so that the frequency interval Δf between the OFDM frequency band and the GFDM frequency band is larger than the frequency interval Δf _G. Then (see (c) of FIG. 13), the transmission power P_GFDM and the frequency are determined. 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) that satisfies the equation (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 utilization efficiency is lowered. However, in the embodiment of the present invention, the frequency interval Δf is not always increased, but a certain 5G Since the frequency interval Δf is increased only for the user, the frequency utilization efficiency does not decrease when considering the entire wireless communication.

  Also, the allocating unit 1512 obtains the ratio between the 4G terminal and the 5G terminal, and changes the correlation coefficient c according to the obtained 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, to set the correlation coefficient c to the standard value _{c 0} or more, it determines the transmission power P_GFDM.

  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 the allocation device 151 may be realized by software.

  In this case, the allocation device 151 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). And ROM memorize | stores the program Prog which consists of each step 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.

  The program Prog may be recorded and distributed on a recording medium such as a CD or a DVD. When the recording medium on which the program Prog is recorded is loaded on the computer, the computer reads the program Prog from the recording medium and executes it, 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, GFDM is used as the non-orthogonal multicarrier radio communication scheme. However, in the embodiment of the present invention, the non-orthogonal multicarrier radio communication scheme is not limited to this, and FBMC (Filter Bank Multi -Carrier) or UFMC (Universal Filtered Multi-Carrier), or any non-orthogonal multicarrier.

  In the above description, the case where the orthogonal multicarrier scheme (OFDM) radio communication scheme and the non-orthogonal multicarrier scheme (GFDM) radio communication scheme coexist has been described. However, in the embodiment of the present invention, 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 rather than the first wireless communication method, coexist, the allocating unit 1512 performs the second operation. You may make it allocate transmission power and a frequency with the method mentioned above to the terminal device which performs radio | wireless communication by a radio | wireless communication system.

  Therefore, the allocating device according to the embodiment of the present invention is the first terminal device that performs wireless communication by the first wireless communication method, and the second wireless communication method for the next generation rather than the first wireless communication method. An allocation device for allocating power and frequency used by a second terminal device in a wireless communication environment in which a second terminal device that performs wireless communication by the wireless communication method is mixed, and in a channel in the first wireless communication method When calculating a mutual interference obtained by multiplying a ratio of energy per modulation symbol in a channel in the second wireless communication system to energy per modulation symbol by a correlation coefficient, and performing wireless communication by the first wireless communication system Calculation means for calculating the reciprocal of the signal-to-noise power ratio and the 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.

  In addition, 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 by the first wireless communication method, and wireless communication 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 a second terminal device in a wireless communication environment in which a second terminal device that performs wireless communication by a second wireless communication method is used. The first terminal device that performs wireless communication by the first wireless communication method, and the second terminal that performs wireless communication by the second wireless communication method, which is a next-generation wireless communication method, than the first wireless communication method. A program for causing a computer to allocate power and frequency used by the second terminal device in a wireless communication environment in which two terminal devices are mixed Thus, the computing means calculates 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 the correlation coefficient. In addition, the 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 assigning means, the mutual interference is sufficiently greater than the reciprocal of the signal-to-noise power ratio. What is necessary is just to make a computer perform the 2nd step which allocates the electric power and frequency which a 2nd terminal device uses so that it may become small.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  The present invention is applied to an allocation apparatus, a program for causing a computer to execute, and a computer-readable recording medium on which the program is recorded.

  1 base station, 2-6 terminal device, 10 wireless communication system, 11, 21,51 antenna, 12, 22, 52 receiver, 13, 23, 53 transmitter, 14 transmitter / receiver, 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 allocation 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 up converter, 138, 144 adder, guard interval inserter 139, 141 IFFT, 143 guard interval inserter, 145 DA converter, 151 allocation device, 161 symbol demapper 162 decoder, 1511 calculation means, 1512 allocation means.

Claims (9)

A first terminal device that performs wireless communication by the first wireless communication method, and a second terminal that performs wireless communication by a second wireless communication method that is a wireless communication method for the next generation than the first wireless communication method An allocation device that allocates power and frequency used by the second terminal device in a wireless communication environment in which terminal devices are mixed,
Calculating a 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; Computing means for computing the reciprocal of the signal-to-noise power ratio when performing wireless communication by one wireless communication method;
An allocation apparatus comprising: allocation means for allocating power and frequency used by the second terminal apparatus so that the mutual interference is sufficiently smaller than the reciprocal of the signal-to-noise power ratio.   The allocating device according to claim 1, wherein the allocating unit allocates power used by the second terminal device so that a 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 in accordance with a user of the second terminal device. The first wireless communication system is an orthogonal modulation multicarrier system,
The allocation apparatus according to any one of claims 1 to 3, wherein the second wireless communication scheme is a non-orthogonal multicarrier scheme. A first terminal device that performs wireless communication by the first wireless communication method, and a second terminal that performs wireless communication by 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 terminal devices are mixed,
The calculating means calculates a 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. And a first step of calculating a reciprocal of a signal-to-noise power ratio when performing wireless communication by the first wireless communication method;
An allocating means for causing a computer to execute a second step of allocating power and frequency used by the second terminal apparatus so that the mutual interference is sufficiently smaller than a reciprocal of the signal-to-noise power ratio; program.   The said allocation means allocates the electric power which a said 2nd terminal device uses so that an electric power value may become small as the said signal to noise power ratio becomes large in the said 2nd step. To run on a computer.   The computer according to claim 5 or 6, wherein, in the first step, the computing means computes the mutual interference by reducing the correlation coefficient in accordance with a user of the second terminal device. A program to be executed. The first wireless communication system is an orthogonal modulation multicarrier system,
The program for causing a computer to execute the second wireless communication method according to any one of claims 5 to 7, wherein the second wireless communication method is a non-orthogonal multicarrier method.   The computer-readable recording medium which recorded the program of any one of Claims 5-8.

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