JP2018142854A - Allocation device, transmitter including the same, program to be executed by computer, and computer readable recording medium recording program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an allocation device that efficiently allocates frequency resources in consideration of traffic priority or interference. In an allocation device 10 in a transmitter, a dividing unit 11 divides a continuous band included in an unused band including a guard band into allocation units. The calculation means 12 calculates the multiplication result obtained by multiplying the division result obtained by dividing the instantaneous channel capacity by the average channel capacity by the correction term that increases as the traffic priority increases, as the evaluation value. The allocation unit 13 executes at least one of the first and second allocation processes for all allocation units. The first allocation process is a process of allocating the allocation unit to the user having the largest evaluation value. The second allocation processing is performed on a user having a received signal strength whose difference from the received signal strength of the user in the adjacent band of the allocation unit is a threshold value or less, or a user having the same subcarrier width as the subcarrier width of the user. This is a process of allocating allocation units. [Selection diagram] Figure 2

Description

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

  In the fifth generation mobile communication system (5G), communication devices having a wide variety of traffic are connected to a single wireless communication system, so that further effective use of limited frequency resources is important.

  In 3GPP (Third Generation Partnership Project), Generalized Frequency Division Multiplexing (GFDM) (Non-Patent Document 1) in which the subcarrier width can be flexibly selected has been studied as one of new 5G signal waveforms (Non-Patent Document 1). In the future, an environment in which existing OFDM (Orthogonal Frequency Division Multiplexing) and new GFDM are mixed is assumed.

  In a system using an existing OFDM signal such as LTE (Long Term Evolution), frequency resource allocation control is performed in a certain subcarrier unit called a resource block for a frequency band other than the guard band.

  At that time, as a method for selecting an allocation destination (user / terminal), PF (Proportional Fairness) (Non-Patent Document 3) in consideration of fairness of transmission opportunities is known.

  In general resource allocation, an index (metric) calculated from the estimated throughput (data rate) of the allocation destination or received SINR (Signal to Interference and Noise Ratio) is compared, and the user with the largest metric is assigned to the allocation destination. select.

  In this case, if the assignment destination is selected based on only the instantaneous value, the communication environment is different for each user, so that it is difficult for a user with a poor communication environment to be assigned, and unfair transmission opportunities are likely to occur between users.

  Therefore, in the PF, by adjusting the metric so that the metric becomes larger as the user has a smaller transmission opportunity using an average value such as metric = (instantaneous data rate) / (average data rate), the transmission opportunity between users is increased. Consider fairness.

G. Fettweis, et al., “GFDM-Generalized Frequency Division Multiplexing,” Proc. IEEE VTC 2009, Apr. 2009. 3GPP, R1-164327, Fujitsu, “On coexistence of new waveforms for NR”. C. Wengerter, J. Ohlhorst, A.G.E.von Elbwart, “Fairness and throughput analysis for generalized proportional fair frequency scheduling in OFDMA,” IEEE 61stVTC, vol. 5, May 2005. Yoko Funa, Tatsuya Yoshioka, Hiroyuki Shinbo, “A Study on Inter-subcarrier Interference Cancellation with Different Widths Using GFDM”, Shingaku Sodai, B-17-5, Mar.2016. R. Datta, I. Kanno, M. Ariyoshi, “Evaluation of Flexible Hybrid Multicarrier Transmission System for 5G Mobile Network” -5, Mar. 2015.

  Because various traffic handled by 5G has different performance requirements such as communication quality and real-time characteristics, limited frequency resources are taken into account while considering the QoS (Quality of Service) (priority and delay tolerance) of each traffic. It is necessary to perform efficient allocation control.

  However, the conventional PF has a problem in that it cannot perform efficient allocation control of frequency resources in consideration of QoS.

  Also, for efficient use of frequency resources (improvement of throughput), it is effective to process small traffic using GFDM, but throughput deteriorates due to inter-carrier interference caused by the mixed OFDM / GFDM. Therefore, resource allocation control considering interference is required.

  FIG. 10 is a schematic diagram showing inter-carrier interference ICI of the own signal and interference IUI from other users in the received signal of the transmission signal using the GFDM technique.

  As shown in FIG. 10, the received signal of the transmission signal using the GFDM technique includes inter-carrier interference ICI (Inter Carrier Interference) of the own signal and interference IUI (Inter User Interference) from other users.

  And it has been confirmed that the characteristics of the received signal can be improved by canceling the ICI of the own signal and the IUI from another user (Non-Patent Document 4), and OFDM is not used on the existing OFDM system. It has also been confirmed that when GFDM is arranged in the guard band, ICI / IUI can be reduced by making both ends (several subcarriers) of the GFDM signal empty (Non-patent Document 5).

  However, since complete interference removal cannot be performed only by the above-described method, consideration at the time of resource allocation is required.

  Therefore, according to the embodiment of the present invention, there is provided an allocation apparatus that performs efficient allocation of frequency resources in consideration of traffic priority or interference.

  In addition, according to the embodiment of the present invention, a transmitter including an allocating device that performs efficient allocation of frequency resources in consideration of traffic priority or interference is provided.

  Furthermore, according to the embodiment of the present invention, there is provided a program for causing a computer to execute efficient allocation of frequency resources in consideration of traffic priority or interference.

  Furthermore, according to an embodiment of the present invention, there is provided a computer-readable recording medium recording a program for causing a computer to execute efficient allocation of frequency resources in consideration of traffic priority or interference.

(Configuration 1)
According to the embodiment of the present invention, the allocating apparatus includes a first wireless communication system including a guard band and an allocation target band that are not used for wireless communication by a predetermined user, and a second wireless communication system. An allocation apparatus that performs efficient allocation of radio communication resources in a radio communication environment, and includes a dividing unit, a calculation unit, and an allocation unit.

  The dividing means divides the continuous band into one or more allocation units which are frequency resources when the continuous band included in the unused band including the guard band is equal to or more than the allocation unit having a predetermined bandwidth.

  The calculation means increases the value as the traffic priority increases and the traffic priority decreases as the result of dividing the instantaneous channel capacity by the average channel capacity that is the average of the channel capacity in a predetermined time unit. A calculation process for calculating a multiplication result obtained by multiplying a correction term that decreases in value as an evaluation value of a user to be assigned is executed for all users to be assigned.

  The allocation unit executes at least one of the first and second allocation processes for all allocation units.

  The first allocation process is a process for allocating an allocation unit to the user having the maximum evaluation value.

  In addition, the second allocation process is performed for a user having a received signal strength whose difference from a received signal strength of a user assigned to the adjacent band of the allocation unit is equal to or less than a threshold value or an adjacent band of the allocation unit. In this process, an allocation unit is allocated to a user having the same subcarrier width as that of the user.

  In the allocation apparatus according to the embodiment of the present invention, the value that increases as the traffic priority increases and the evaluation value decreases as the traffic priority decreases, or the adjacent band of the allocation unit. An allocation unit is allocated to a user who can reduce interference with a user who uses.

  Therefore, frequency resources can be efficiently allocated in consideration of traffic priority, or frequency resources can be efficiently allocated so as to reduce interference.

(Configuration 2)
In the configuration 1, in each of the first and second allocation processes, the allocation unit allocates an allocation unit only to a user who performs radio communication by the second radio communication method when the allocation unit exists in the guard band. When the unit exists in an unused band other than the guard band, an allocation unit is allocated to a user who performs wireless communication by the first wireless communication method and / or a user who performs wireless communication by the second wireless communication method.

  According to the configuration 2, the allocating device allocates a guard band that cannot be used by a user who performs wireless communication using the first wireless communication method to a user who performs wireless communication using the second wireless communication method, and an unused band other than the guard band. Are assigned to a user who performs wireless communication by the first wireless communication method and / or a user who performs wireless communication by the second wireless communication method.

  Therefore, a user who performs wireless communication by the second wireless communication method can efficiently perform wireless communication, and the throughput of the entire system can be improved.

(Configuration 3)
In the configuration 1 or the configuration 2, the allocation unit executes both the first and second allocation processes for all allocation units.

  According to Configuration 3, since the allocation apparatus allocates allocation units to users in consideration of both traffic priority and interference, a user with high priority can perform radio communication with reduced interference.

(Configuration 4)
In any one of Configurations 1 to 3, the allocation unit allocates an unused band that is not divisible by the allocation unit in the first allocation process or the second allocation process to an adjacent band of the unused band. Of the assigned users, the unused bandwidth that was not divisible by the allocation unit is allocated to the user with the smallest allocation amount.

  According to the configuration 4, it is possible to reduce the interference with the user assigned to the adjacent band and improve the throughput between the user with the smallest allocation amount and the adjacent user.

(Configuration 5)
In any one of Configurations 1 to 4, the allocation unit allocates a user having the highest traffic priority when there are a plurality of users having the maximum evaluation value in the first allocation process or the second allocation process. Assign units.

  According to the configuration 5, it is possible to reduce a delay in wireless communication by a user having the highest traffic priority.

(Configuration 6)
In any one of the configurations 1 to 5, the calculation means multiplies the division result obtained by dividing the instantaneous received signal strength by the average received signal strength, which is an average of the received signal strength in a predetermined time unit, in the calculation processing. The multiplication result is calculated as an evaluation value.

  According to Configuration 6, since the instantaneous received signal strength is low, an opportunity for wireless communication can be given to a user who has few opportunities for wireless communication.

(Configuration 7)
In any one of the configurations 1 to 5, the calculation means, in the calculation process, evaluates a multiplication result obtained by multiplying a division result obtained by dividing an instantaneous throughput by an average throughput that is an average of throughput in a predetermined time unit by the correction term. Calculate as a value.

  According to Configuration 7, since the instantaneous throughput is low, an opportunity for wireless communication can be given to a user who has few opportunities for wireless communication.

(Configuration 8)
According to the embodiment of the present invention, the transmitter includes the allocating device according to any one of configurations 1 to 7.

  According to Configuration 8, it is possible to transmit a transmission signal using frequency resources that are efficiently allocated in consideration of traffic priority or frequency resources that are efficiently allocated so as to reduce interference.

(Configuration 9)
Further, according to the embodiment of the present invention, the program includes a first wireless communication system including a guard band and an allocation target band that are not used for wireless communication by a predetermined user, and a second wireless communication system. A program for causing a computer to execute efficient allocation of wireless communication resources in a mixed wireless communication environment,
A first step in which the dividing means divides the continuous band into the allocation units when the continuous band included in the unused band including the guard band is equal to or more than the allocation unit having a predetermined bandwidth;
The calculation means divides the instantaneous channel capacity by the average channel capacity, which is the average of the channel capacity in a predetermined time unit, and the value increases as the traffic priority increases, and the traffic priority decreases. A second step of executing, for all users to be allocated, a calculation process for calculating a multiplication result obtained by multiplying a correction term that decreases in accordance with the evaluation value of the user to be allocated as an evaluation value;
The allocation means is a program for causing a computer to execute a third step of executing at least one of the first and second allocation processes for all allocation units.

  The first allocation process is a process of allocating an allocation unit to the user having the maximum evaluation value, and the second allocation process is a difference between the received signal strength of the user allocated to the adjacent band of the allocation unit. This is a process of allocating an allocation unit to a user having a received signal strength equal to or less than a threshold or a user having the same subcarrier width as that of a user allocated to an adjacent band of the allocation unit.

  By causing the computer to execute the program according to the embodiment of the present invention, the allocation unit has a value that increases as the traffic priority increases, and the evaluation value decreases as the traffic priority decreases. It is assigned to a user who can reduce interference with a user or a user who uses an adjacent band of the allocation unit.

  Therefore, frequency resources can be efficiently allocated in consideration of traffic priority, or frequency resources can be efficiently allocated so as to reduce interference.

(Configuration 10)
In the configuration 9, in the third step, the allocating means is for only a user who performs wireless communication by the second wireless communication method when the allocation unit exists in the guard band in each of the first and second allocation processes. When an allocation unit is allocated and the allocation unit exists in an unused band other than the guard band, the allocation unit is allocated to a user who performs wireless communication by the first wireless communication method and / or a user who performs wireless communication by the second wireless communication method. Assign.

  According to the configuration 10, by causing the computer to execute the program, the frequency resource of the user who performs wireless communication by the second wireless communication method is a guard band that cannot be used by the user who performs wireless communication by the first wireless communication method. Alternatively, the frequency resources of users who are assigned to unused bands other than the guard band and perform wireless communication using the first wireless communication method are assigned to unused bands other than the guard band.

  Therefore, a user who performs wireless communication by the second wireless communication method can efficiently perform wireless communication, and the overall throughput can be improved.

(Configuration 11)
In the configuration 9 or the configuration 10, the allocation unit executes both the first and second allocation processes for all allocation units in the third step.

  According to the configuration 11, by causing the computer to execute the program, the allocation unit is allocated to the user in consideration of both the priority of traffic and the interference.

  Therefore, a user with high priority can perform wireless communication with reduced interference.

(Configuration 12)
In any one of Configuration 9 to Configuration 11, if there is an unused band that was not divisible by the allocation unit in the first allocation process or the second allocation process, the allocation unit allocates to an adjacent band of the unused band Of the assigned users, the unused bandwidth that was not divisible by the allocation unit is allocated to the user with the smallest allocation amount.

  According to the configuration 12, by causing the computer to execute the program, it is possible to reduce the interference with the user assigned to the adjacent band and improve the throughput between the user with the smallest allocation amount and the adjacent user.

(Configuration 13)
In any one of Configurations 9 to 12, the allocation unit allocates a user having the highest traffic priority when there are a plurality of users having the maximum evaluation value in the first allocation process or the second allocation process. Assign units.

  According to the configuration 13, by causing the computer to execute the program, it is possible to reduce the delay in wireless communication by the user with the highest traffic priority.

(Configuration 14)
In any one of Configurations 9 to 13, the calculation means multiplies the correction result by the division result obtained by dividing the instantaneous received signal strength by the average received signal strength that is an average of the received signal strength in a predetermined time unit in the calculation process. The multiplication result is calculated as an evaluation value.

  According to the configuration 14, by causing the computer to execute the program, an opportunity for wireless communication can be given to a user who has few opportunities for wireless communication because the instantaneous received signal strength is low.

(Configuration 15)
In any one of Configurations 9 to 13, the calculation means uses the multiplication result obtained by multiplying the division result obtained by dividing the instantaneous throughput by the average throughput that is the average of the throughput in a predetermined time unit as the evaluation value in the calculation processing. Calculate.

  According to the configuration 15, by causing the computer to execute the program, it is possible to give a wireless communication opportunity to a user who has few wireless communication opportunities because the instantaneous throughput is low.

  Furthermore, a recording medium according to the embodiment of the present invention is a computer-readable recording medium on which the program according to any one of Configurations 9 to 15 is recorded.

  Frequency resources can be allocated efficiently considering the priority of traffic, or frequency resources can be allocated efficiently to reduce interference.

It is the schematic of the transmitter by embodiment of this invention. It is the schematic which shows the structure of the allocation apparatus shown in FIG. It is a conceptual diagram of the bandwidth to be allocated. Correction term _{(1 / (1 + α (} QCI delay) β)) is a diagram showing the relationship between the _{QCI delay.} It is a flowchart for demonstrating operation | movement of an allocation apparatus. It is another flowchart for demonstrating operation | movement of an allocation apparatus. It is another flowchart for demonstrating operation | movement of an allocation apparatus. It is a figure which shows the relationship between total throughput and SINR. It is a flowchart for demonstrating operation | movement of the transmitter shown in FIG. It is a schematic diagram which shows the inter-carrier interference ICI of the own signal in the received signal of the transmission signal using GFDM technology, and the interference IUI from other users.

  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 transmitter according to an embodiment of the present invention. Referring to FIG. 1, transmitter 100 according to the embodiment of the present invention performs wireless communication in a wireless communication environment in which OFDM (first wireless communication system) and GFDM (second wireless communication system) are mixed. Transmitter to do.

  Transmitter 100 includes assignment apparatus 10, transmitters OFDM-1 to OFDM-i (i is a positive integer), transmitters GFDM-1 to GFDM-j (j is a positive integer), adder 120, , A DA converter 121, a wireless unit 122, and an antenna 123.

  The allocation apparatus 10 receives user equipment (UE) information including user information, a band used for wireless communication, SINR (ratio of signal strength to the sum of interference signal power and noise power), and throughput from a host system (not shown). Based on the received UE information, wireless communication is performed for users (OFDM users) that perform radio communication using OFDM and users (GFDM users) that perform radio communication using GFDM by a method described later. A band is allocated, and the allocated band is output to transmitters OFDM1 to OFDM-i and transmitters GFDM1 to GFDM-j.

  In the embodiment of the present invention, the term “user” means a transmitter that performs wireless communication or an owner of the transmitter.

  Each of the transmission units GFDM1 to GFDM-j includes an encoding unit 101, a symbol mapping unit 102, a serial / parallel converter 103, upsampling processing units 104-1 to 104-K (K is an integer of 1 or more), , Waveform shaping filters 105-1 to 105-K, subcarrier up converters 106-1 to 106-K, an adder 107, and a CP (Cyclic Prefix) unit 108.

  Encoding section 101 receives information bits from a host system (not shown), encodes the received information bits, and outputs the encoded code information bits to symbol mapping section 102.

  The symbol mapping unit 102 receives the code information bits from the encoding unit 101, and modulates the received code information bits into transmission symbols composed of complex number data. Then, the symbol mapping unit 102 outputs the modulated transmission symbol to the serial / parallel converter 103.

  The serial / parallel converter 103 receives an allocated band from the allocation device 10 and receives a transmission symbol from the symbol mapping unit 102. Then, serial / parallel converter 103 distributes the transmission symbols to K subcarriers and M time slots in the received allocated band. 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 transmitter 100, K similar processing systems are configured corresponding to each subcarrier.

When attention is paid to such a k-th processing system of the transmitter 100, a transmission symbol d _k [m] (m = 0, 1,..., M−1) of complex data is converted into an upsampling processing unit 104-k. Is up-sampled N times 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 105-k applies the pulse shaping filter g [n] (n = 0, 1,..., (LN−1)) having the filter length L (≦ M) to 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 106-k can be expressed by the following equation (4).

Here, the symbol + in circles indicates 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.

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 107 adds all the subcarrier signals to generate a transmission signal of the data block D as shown in the following equation (7).

  Adder 107 then outputs the transmission signal of data block D represented by Expression (7) to CP section 108.

  CP section 108 inserts a guard interval called a cyclic prefix at the beginning of the transmission signal of data block D and outputs the result to adder 120.

  Each of the transmission units OFDM-1 to OFDM-i includes an encoding unit 111, a symbol mapping unit 112, a serial-parallel converter 113, an IFFT (Inverse Fast Fourier Transform) unit 114, a parallel-serial converter 115, CP section 116.

  Encoding section 111 receives information bits from a host system (not shown), encodes the received information bits, and outputs the encoded code information bits to symbol mapping section 112.

  The symbol mapping unit 112 receives the code information bits from the encoding unit 111 and modulates the received code information bits into transmission symbols including complex number data. Then, the symbol mapping unit 112 outputs the modulated transmission symbol to the serial / parallel converter 113.

  The serial / parallel converter 113 receives the allocated band from the allocation device 10 and receives the transmission symbol from the symbol mapping unit 112. Then, serial / parallel converter 113 converts the transmission symbol from the serial string to the parallel string in the allocated band received, and outputs the transmission symbol converted to the parallel string to IFFT section 114.

  IFFT section 114 receives the transmission symbol converted into the parallel string from serial / parallel converter 113, performs the inverse fast Fourier transform on the received transmission symbol, and outputs the transmission symbol obtained by the inverse fast Fourier transform to parallel / serial converter 115. .

  The parallel-serial converter 115 receives the transmission symbol subjected to the inverse fast Fourier transform from the IFFT unit 114, converts the received transmission symbol from a parallel string to a serial string, and transmits the transmission symbol converted into the serial string to the CP unit 116. Output.

  CP section 116 inserts a guard interval called a cyclic prefix at the beginning of the transmission signal of the data block and outputs the result to adder 120.

  The adder 120 receives the data block (transmission signal) in which the guard interval is inserted from the transmission units OFDM-1 to OFDM-i and the transmission units GFDM-1 to GFDM-j, adds the received transmission signals, The added transmission signal is output to the DA converter 121.

  The DA converter 121 receives the transmission signal from the adder 120, 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 122.

  The wireless unit 122 converts the transmission signal received from the DA converter 121 into a baseband signal, and transmits the converted baseband signal via the antenna 123.

  The transmitter 100 transmits a transmission signal using OFDM or / and GFDM by the method described above.

  FIG. 2 is a schematic diagram showing the configuration of the allocation device 10 shown in FIG. Referring to FIG. 2, allocation apparatus 10 includes a dividing unit 11, a calculation unit 12, and an allocation unit 13.

  The dividing unit 11 receives UE information from a host system (not shown), and detects a radio communication band included in the received UE information. Then, based on the detected band, the dividing unit 11 detects an unused band that is not used for wireless communication.

Thereafter, the dividing unit 11 determines whether or not a continuous band equal to or greater than the allocation unit BW _alloc exists in the unused band.

If it is determined that a continuous band equal to or greater than the allocation unit BW _alloc does not exist in the unused band, the allocation device 10 stops operating.

On the other hand, when the dividing unit 11 determines that a continuous band equal to or greater than the allocation unit BW _alloc exists in the unused band, the dividing unit 11 divides the continuous band into S allocation units BW _alloc (s) (s = 1 to S). Each BW _alloc (s) has a bandwidth of 15 to 180 kHz, for example.

Then, the dividing unit 11 outputs the divided S allocation units BW _alloc (s) (s = 1 to S) to the calculation unit 12 and the allocation unit 13.

The computing means 12 has a built-in timer. When receiving the UE information from the host system (not shown), the calculating means 12 detects the SINR and the throughput included in the received UE information. In addition, the calculation means 12 receives S allocation units BW _alloc (s) (s = 1 to S) from the division means 11.

Then, the calculation means 12 calculates a metric (evaluation value) Metric (BW _alloc (s), x) by the following equation.

In Equation (8), QCI _delay (x) represents a QCI delay tolerance [s], α represents a coefficient (depth) for adjusting the delay tolerance, and β represents a coefficient for adjusting the delay tolerance. (Inclination).

The instantaneous SINR (BW _alloc (s), x) in equation (8) is expressed by the following equation.

In Equation (9), P _rx (BW _alloc (s), x, t) represents the received signal of the allocation unit BW _alloc (s) of user x at time t.

Further, a term in which “^” is written on P _tx on the right side of Expression (9) is represented by the following expression, and is an estimated transmission signal of the allocation unit BW _alloc (s) of user x at time t.

  In equation (10), H (x) is the channel estimate value of user x estimated from the reference signal.

  The average SINR (x) in the equation (8) is expressed by the following equation.

T (x) in Equation (11) is the SINR measurement time, and is obtained by T _end (x) −T _start (x).

When the calculation means 12 calculates the metric (evaluation value) Metric (BW _alloc (s), x) using the equations (8) to (11), the calculated metric (evaluation value) Metric (BW _alloc ( s) and x) are output to the assigning means 13.

The allocation unit 13 receives UE information from a host system (not shown), receives an allocation unit BW _alloc from the division unit 11, and receives a metric (evaluation value) Metric (BW _alloc (s), x) from the calculation unit 12. .

  Then, the assigning unit 13 detects user information (OFDM user and GFDM user) included in the UE information.

Moreover, the allocation means 13 determines whether allocation unit BW _alloc (s) exists in a guard band.

When the allocation unit 13 determines that the allocation unit BW _alloc (s) exists in the guard band, the allocation unit 13 registers the GFDM user among the registered users registered as the allocation target user in the allocation candidate.

On the other hand, when determining that the allocation unit BW _alloc (s) does not exist within the guard band, the allocation unit 13 registers all registered users (OFDM users and GFDM users) as allocation candidates.

Then, the assigning means 13 determines whether or not a GFDM user is assigned to the adjacent band of the assignment unit BW _alloc (s).

When determining that the GFDM user is allocated to the adjacent band of the allocation unit BW _alloc (s), the allocating unit 13 excludes, from among the registered users, users whose subcarrier width is different from the user of the adjacent band from the allocation candidates. The allocation unit BW _alloc (s) is allocated to the user having the largest metric (evaluation value) Metric (BW _alloc (s), x) among the remaining allocation candidates excluded.

On the other hand, when the allocation unit 13 determines that the GFDM user is not allocated to the adjacent band of the allocation unit BW _alloc (s), the maximum metric (evaluation value) Metric (BW _alloc (s), Assign the allocation unit BW _alloc (s) to users with x).

The detailed operation in the case of assigning the allocation unit BW _alloc (s) to the user having the maximum metric (evaluation value) Metric (BW _alloc (s), x) is as follows.

The allocating unit 13 determines whether or not there are a plurality of maximum metrics (evaluation values) Metric (BW _alloc (s), x).

When it is determined that there are a plurality of maximum metrics (evaluation values) Metric (BW _alloc (s), x), the allocation unit 13 allocates the allocation unit BW _alloc (s) to the user having the maximum priority. Note that the priority is defined by 3GPP in relation to the allowable delay amount, and includes priority 0.5 to priority 9. This priority is determined according to the use or required quality of communication data (delayable amount or allowable data loss rate, etc.). The smaller the value, the higher the priority. Note that the allowable delay amount with the priority of 0.7 is the smallest and the allowable delay amount with the priorities of 5, 6, 8, and 9 is the largest.

On the other hand, allocation means 13, the maximum metric (evaluation _{value) Metric (BW alloc (s)} , x) when it is determined that there are not a plurality, the maximum metric (evaluation _{value) Metric (BW alloc (s)} , x) Allocation unit BW _alloc (s) is allocated to a user who has

The allocation means 13 allocates all allocation units BW _alloc (s) by the method described above.

Then, after allocating all the allocation units BW _alloc (s), the allocation unit 13 determines whether there is an unused band that cannot be divided by the allocation unit BW _alloc (s).

When the allocating unit 13 determines that there is an unused band that was not divisible by the allocation unit BW _alloc (s), the allocating unit 13 assigns an unused band to a user with a small allocated amount among users allocated to adjacent resources of the unused band. Assign continuously.

On the other hand, when it is determined that there is no unused bandwidth that was not divisible by the allocation unit BW _alloc (s), the operation of the allocation device 10 ends.

FIG. 3 is a conceptual diagram of a bandwidth to be allocated. FIG. 3 is a conceptual diagram of the bandwidth when the bandwidth of the allocation unit BW _alloc (s) is 1.4 MHz, for example.

  Referring to FIG. 3, the horizontal direction is the time axis and the vertical direction is the frequency axis on the paper surface of FIG. The band to be allocated is a band in which when one OFDM guard band and a resource block (RB) band are set, this set is continuous in the frequency axis direction.

  The OFDM guard band is a band for preventing interference in which an OFDM user cannot be assigned.

  Therefore, in the embodiment of the present invention, OFDM users are assigned to resource block bands, and GFDM users are assigned to both OFDM guard bands and resource block bands.

That is, GFDM users are allocated to allocation units BW _alloc (1), BW _alloc (2),... Represented by s = 1, s = 2,..., And are represented by resource blocks RB1 to RB3. And the allocation units BW _alloc (q) and BW _alloc (q + 1) represented by s = q, s = q + 1 are allocated to the band represented by the resource blocks RB4 and RB5. Assign GFDM users.

  As a result, both OFDM users and GFDM users are allocated to the resource block band.

In all allocation units of s = 1 to S, when the metric of the allocation candidate user is the same, a user with high traffic priority is allocated. Further, when the OFDM metric is maximum in a certain allocation unit BW _alloc (s) in the same resource block band, OFDM users are allocated to the allocation units BW _alloc (q) and BW _alloc (q + 1).

Each of resource blocks RB1 to RB5 has a bandwidth that is the same as or different from the bandwidth of allocation unit BW _alloc (s), and has a bandwidth defined by OFDM.

FIG. 4 is a diagram illustrating a relationship between the correction term (1 / (1 + α (QCI _delay ) ^β )) and the QCI _delay .

In FIG. 4, the vertical axis represents the correction term (1 / (1 + α (QCI _delay ) ^β )), and the horizontal axis represents QCI _delay [x].

FIG. 4 shows the relationship between the correction term (1 / (1 + α (QCI _delay ) ^β )) and the QCI _delay when the values of the coefficients α and β are changed.

Referring to FIG. 4, coefficient α is changed to 0.1, 0.5, 1.0, 1.5, 2.0, and 3.0, and coefficient β is changed to 0.1, 0.5, 1. When changed to 0, 1.5, 2.0, and 3.0, the correction term (1 / (1 + α (QCI _delay ) ^β )) increases as the QCI _delay decreases.

Thus, the correction term (1 / (1 + α (QCI _delay ) ^β )) increases as the allowable delay amount QCI _delay decreases (that is, as the priority increases), and the allowable delay amount QCI _delay increases ( In other words, it becomes smaller as the priority becomes lower. As a result, the metric Metric (BW _alloc (s), x) increases when the allowable delay amount QCI _delay decreases (that is, when the priority increases), and increases when the allowable delay amount QCI _delay increases (that is, the priority). Becomes smaller).

Accordingly, the correction term (1 / (1 + α (QCI _delay ) ^β )) is corrected so that the metric Metric (BW _alloc (s), x) becomes large as the priority becomes high, and the priority becomes low. Correction is made so that the metric Metric (BW _alloc (s), x) becomes smaller.

  Thereby, frequency resources can be preferentially allocated to users with high priority.

Further, when β = 1.0, when α increases in the range of 0.1 to 3.0, the correction term (1 / (1 + α (QCI _delay ) ^β )) is calculated for each QCI _delay (x). As α decreases in the range of 0.1 to 3.0, the correction term (1 / (1 + α (QCI _delay ) ^β )) increases for each QCI _delay (x).

As a result, when β is constant, the correction term (1 / (1 + α (QCI _delay ) ^β )) is inversely proportional to α. Increasing α increases the degree of adjustment of the allowable delay amount QCI _delay , and decreasing α decreases the degree of adjustment of the allowable delay amount QCI _delay .

Therefore, α is a coefficient representing the depth for adjusting the allowable delay amount QCI _delay .

Further, when α = 1.0, when β increases in the range of 0.1 to 3.0, the correction term (1 / (1 + α (QCI _delay ) ^β )) is calculated for each QCI _delay (x). As β becomes smaller in the range of 0.1 to 3.0, the correction term (1 / (1 + α (QCI _delay ) ^β )) becomes smaller for each QCI _delay (x).

As a result, when α is constant, the correction term (1 / (1 + α (QCI _delay ) ^β )) varies exponentially with β. Increasing β increases the power of the delay allowable amount QCI _delay , and decreasing β decreases the power of the delay allowable QCI _delay . That is, β determines the rate of change in the degree to which the delay allowable amount QCI _delay is adjusted.

Therefore, β is a coefficient representing a slope for adjusting the allowable delay amount QCI _delay .

  FIG. 5 is a flowchart for explaining the operation of the allocation device 10. Referring to FIG. 5, when the operation of allocation apparatus 10 is started, dividing unit 11 registers information on unused frequency bands at the current time (step S1).

  And the calculating means 12 registers user information (x) with a communication request (step S2).

Thereafter, the dividing unit 11 determines whether or not there is a continuous band equal to or greater than the allocation unit BW _alloc (s) among the unused bands (step S3).

When it is determined in step S3 that there is no continuous band equal to or greater than the allocation unit BW _alloc (s), the operation of the allocation device 10 ends. This is because neither OFDM users nor GFDM users can be allocated to unused bands.

On the other hand, when it is determined in step S3 that there is a continuous band equal to or greater than the allocation unit BW _alloc (s), the dividing unit 11 divides the continuous band into allocation units BW _alloc (s) having a certain bandwidth ( Step S4). By this division, the maximum number S of allocation units BW _alloc (s) is determined.

Then, the dividing unit 11 outputs the divided S allocation units BW _alloc (1) to BW _alloc (S) to the allocation unit 13.

Assignment means 13 receives the S allocation unit _{BW alloc (1) ~BW} alloc the (S) from the dividing means 11 sets s = 1 (step S5).

Then, the assigning means 13 determines whether or not the assignment unit BW _alloc (s) exists in the guard band (step S6).

When it is determined in step S6 that the allocation unit BW _alloc (s) exists in the guard band, the allocation unit 13 registers GFDM users among the registered users as allocation candidates (step S7).

On the other hand, when it is determined in step S6 that the allocation unit BW _alloc (s) does not exist in the guard band, the allocation unit 13 registers all registered users (OFDM users and GFDM users) as allocation candidates (step S8). ).

Then, after step S7 or step S8, the assigning means 13 determines whether or not a GFDM user is assigned to an adjacent area of the assignment unit BW _alloc (s) (step S9).

When it is determined in step S9 that no GFDM user is assigned to the adjacent area of the allocation unit BW _alloc (s), the series of operations proceeds to step S11.

On the other hand, when it is determined in step S9 that the GFDM user is allocated to the adjacent area of the allocation unit BW _alloc (s), the allocation unit 13 has a subcarrier width different from that of the adjacent band among the registered users. The user is excluded from the allocation candidates (step S10). This can reduce interference between users having different subcarrier widths in wireless communication.

Then, after step S10 or in step S9, when it is determined that no GFDM user is assigned to the adjacent region of the allocation unit BW _alloc (s), the computing means 12 sets the PF metric (for each allocation candidate user) = Metric (BW _alloc (s), x)) is calculated using the equations (8) to (10) (step S11), and the calculated PF metric (= Metric (BW _alloc (s), x)) Is output to the assigning means 13.

The allocation unit 13 receives the PF metric (= Metric (BW _alloc (s), x)) from the calculation unit 12. Then, the assigning unit 13 determines whether or not there are a plurality of users having the maximum PF metric (step S12).

When it is determined in step S12 that there are a plurality of users having the maximum PF metric, the allocation unit 13 allocates the allocation unit BW _alloc (s) to the user having the maximum priority (step S13).

On the other hand, when it is determined in step S12 that there are not a plurality of users having the maximum PF metric, the allocation unit 13 allocates the allocation unit BW _alloc (s) to the user having the maximum PF metric (step S14).

Then, after step S13 or step S14, the allocation unit 13 deletes the allocation unit BW _alloc (s) from the registered unused band (step S15).

  Thereafter, the assigning means 13 determines whether or not s = S (step S16).

  When it is determined in step S16 that s = S is not satisfied, the assigning unit 13 sets s = s + 1 (step S17). Thereafter, the series of operations proceeds to step S6, and steps S6 to S17 are repeatedly executed until it is determined in step S16 that s = S.

If it is determined in step S16 that s = S, the allocation unit 13 determines whether there is an unused band that cannot be divided by the allocation unit BW _alloc (s) (step S18).

In step S18, when it is determined that there is no unused band that cannot be divided by the allocation unit BW _alloc (s), the series of operations ends.

On the other hand, when it is determined in step S18 that there is an unused band that was not divisible by the allocation unit BW _alloc (s), the allocating unit 13 determines that the allocated amount is among the users allocated to the adjacent resources of the unused band. Unused bandwidth is continuously allocated to a small number of users (step S19).

Then, when it is determined in step S3 that there is no continuous band equal to or greater than the allocation unit BW _alloc (s) among the unused bands, or in step S18, the unused band that was not divisible by the allocation unit BW _alloc (s). When it is determined that does not exist, or after step S19, the series of operations ends.

In step S6, when it is determined that the allocation unit BW _alloc (s) exists in the guard band and the process proceeds to step S9 via step S7, the allocation unit BW _alloc (s) has the largest PF metric (= Metric ( Assigned to a GFDM user having BW _alloc (s), x)) (see steps S13 and S14).

In step S6, when it is determined that the allocation unit BW _alloc (s) does not exist in the guard band and the process proceeds to step S9 via step S8, the allocation unit BW _alloc (s) has the maximum PF metric ( = Metric (BW _alloc (s), x)) is assigned to a GFDM user or OFDM user (see steps S13 and S14).

Then, the PF metric (= Metric (BW _alloc (s), x)) is obtained by being corrected by 1 / (1 + α × (QCI _delay (x)) ^β ) as shown in Expression (8). Also, the allocation unit BW _alloc (s) included in the OFDM guard band and the resource block band is allocated to the GFDM user or the OFDM user.

  Therefore, frequency resources can be efficiently allocated in consideration of the QoS of each traffic.

  Also, in step S10, among registered users, users whose subcarrier width is different from those of adjacent bands are excluded from allocation candidates. Thereby, it is possible to prevent users with different subcarrier widths from being adjacent to each other, and it is possible to suppress a decrease in throughput due to inter-carrier interference caused by a mixture of GFDM and OFDM.

  Therefore, interference can be reduced and frequency resources can be allocated to users.

Then, in step S10, excluding a registered user whose subcarrier width is different from that of an adjacent band from the allocation candidates, a registered user whose subcarrier width is the same as that of the adjacent band Since this corresponds to not excluding from the allocation candidates, when the process reaches step S13 or step S14 via step S10, the allocation unit BW is assigned to the registered users who have the same subcarrier width as the user of the adjacent band. _alloc (s) will be assigned.

  In the embodiment of the present invention, in step S10, instead of excluding, among registered users, users whose subcarrier width is different from that of the adjacent band from allocation candidates, the SINR difference is greater than the threshold value. Large users may be excluded from allocation candidates. In this case, the threshold value is, for example, a value that does not significantly reduce the throughput of the adjacent user due to interference. That is, as a threshold value, a level at which the throughput of the allocated adjacent user does not significantly decrease as a result of the allocation is used as a threshold value, thereby preventing user allocation / interference having a SINR difference larger than the threshold value.

  As a result, it is possible to prevent adjacent allocation bands of users having a large SINR difference, and to suppress a decrease in throughput due to inter-carrier interference caused by a mixture of GFDM and OFDM.

  Therefore, interference can be reduced and frequency resources can be allocated to users.

  As described above, the allocation apparatus 10 allocates frequency resources to users in consideration of both the QoS and interference of each traffic according to the flowchart shown in FIG.

When a user whose SINR difference is larger than the threshold is excluded from the allocation candidates, an allocation unit BW _alloc (s) is allocated to a user whose SINR difference is equal to or smaller than the threshold.

  FIG. 6 is another flowchart for explaining the operation of the allocation device 10.

  The flowchart shown in FIG. 6 is the same as the flowchart shown in FIG. 5 except that steps S9 and S10 of the flowchart shown in FIG. 5 are deleted.

When allocating unit BW _alloc (s) is allocated to each user according to the flowchart shown in FIG. 6, allocating apparatus 10 executes step S11 to step S19 sequentially after step S7 or step S8.

  As a result, the allocation device 10 allocates frequency resources to users in consideration of only the QoS of each traffic without considering interference.

Thereby, the allocation unit BW _alloc (s) can be allocated to a user with high priority.

  FIG. 7 is still another flowchart for explaining the operation of the allocation device 10. The flowchart shown in FIG. 7 is the same as the flowchart shown in FIG. 5 except that steps S11 and S13 in the flowchart shown in FIG. 5 are replaced with steps S11A and S13A, respectively.

  Referring to FIG. 7, assignment device 10 sequentially executes steps S1 to S10 described above when a series of operations is started.

After step S10, the calculation means 12 of the allocation device 10 calculates a PF metric (= Metric ^* (BW _alloc (s), x)) according to the following equation (step S11A).

In equation (12), instantaneous SINR (BW _alloc (s), x) is calculated using equations (9) and (10), and average SINR (x) is calculated using equations (9) and (11). Is calculated using.

After step S11A, allocation apparatus 10 executes step S12 described above. When it is determined in step S12 that there are a plurality of users having the maximum PF metric, the allocation unit 13 of the allocation apparatus 10 allocates the allocation unit BW _alloc (s) to an arbitrary user having the maximum PF metric. (Step S13A).

  And the allocation apparatus 10 performs step S15-step S19 mentioned above sequentially after step S13A or step S14.

  As described above, according to the flowchart shown in FIG. 7, the allocation device 10 allocates frequency resources to users in consideration of only interference without considering the QoS of each traffic.

Accordingly, the allocation unit BW _alloc (s) can be allocated to the user so as to reduce interference.

In the above description, the calculation means 12 has been described as calculating the metric Metric (BW _alloc (s), x) using the equations (8) to (11). However, in the embodiment of the present invention, _However , the metric Metric (BW _alloc (s), x) may be calculated by the following equation.

In Expression (13), instantaneous Throughput (BW _alloc (s), x) is calculated by the following expression.

  In Expression (13), average Throughput (x) is calculated by the following expression.

In Expression (15), T (x) is a measurement time, and is obtained by T _end (x) −T _start (x).

As described above, the calculation unit 12 calculates the metric Metric (BW _alloc (s), x) using the throughput.

Even when the computing means 12 computes the metric Metric (BW _alloc (s), x) using the equations (13) to (15), the operation of the allocation device 10 is shown in the flowchart shown in FIG. 5 or FIG. It is executed according to the flowchart.

In this case, the computing means 12 computes the metric Metric (BW _alloc (s), x) using the equations (13) to (15) in step S11 of FIG. 5 or FIG.

  Also in this case, the effect described in FIG. 5 or 6 can be obtained.

  When calculating the metric using the throughput, the operation of the allocation device 10 may be executed according to the flowchart shown in FIG.

In this case, the calculation means 12 calculates a PF metric (= Metric ^* (BW _alloc (s), x)) according to the following equation.

In Expression (16), instantaneous Throughput (BW _alloc (s), x) is calculated using Expression (14), and average Throughput (x) is calculated using Expressions (14) and (15). Is done.

And the calculating means 12 calculates PF metric (= Metric ^* (BW _alloc (s), x)) using Formula (14)-Formula (16) in step S11A of FIG.

  Also in this case, the effect described in FIG. 7 can be obtained.

In the embodiment of the present invention, the calculating means 12 generally only has to calculate the PF metric (= Metric (BW _alloc (s), x)) by the following equation.

  Since the above-described SINR and throughput Throughput can be generalized as channel capacity, “channel capacity” is used in equation (17).

The instantaneous channel capacity (BW _alloc (s), x) in equation (17) is calculated by the following equation.

The average channel capacity (BW _alloc (s), x) in equation (17) is calculated by equation (18) and the following equation.

Even when the computing means 12 computes the metric Metric (BW _alloc (s), x) using the equations (17) to (19), the operation of the assignment device 10 is shown in the flowchart shown in FIG. 5 or in FIG. It is executed according to the flowchart.

In this case, the computing means 12 computes the metric Metric (BW _alloc (s), x) using the equations (17) to (19) in step S11 of FIG. 5 or FIG.

  Also in this case, the effect described in FIG. 5 or 6 can be obtained.

  When the metric is calculated using the channel capacity, the operation of the allocation device 10 may be executed according to the flowchart shown in FIG.

In this case, the calculation means 12 calculates a PF metric (= Metric ^* (BW _alloc (s), x)) according to the following equation.

In equation (20), instantaneous channel capacity (BW _alloc (s), x) is calculated using equation (18), and average channel capacity (x) is calculated using equations (18) and (19). Is calculated.

And the calculating means 12 calculates PF metric (= Metric ^* (BW _alloc (s), x)) using Formula (18)-Formula (20) in step S11A of FIG.

  Also in this case, the effect described in FIG. 7 can be obtained.

  FIG. 8 is a diagram showing the relationship between total throughput and SINR. In FIG. 8, the vertical axis represents total throughput, and the horizontal axis represents SINR. The solid line is a frequency resource allocated by the method according to the embodiment of the present invention in an environment in which two terminal apparatuses that perform radio communication using OFDM and two terminal apparatuses that perform radio communication using GFDM coexist. The dotted line indicates the relationship between the total throughput and SINR when frequency resources are allocated by the conventional method in an environment where there are four terminal devices that perform wireless communication using OFDM. Indicates.

FIG. 8 shows a frequency band of 1.4 MHz, an AWGN environment, α = 1.0, β = 1.0, an allocation unit BW _alloc = 180 kHz, and QCI _delay = 0. The relationship between the total throughput and SINR in the case of 05 to 0.3 [ms] (Priority = 2 to 5) is shown.

  Referring to FIG. 8, the total throughput increases as SINR increases (see solid line and dotted line).

Then, in the range of SINR = −2 dB to 10 dB, the total throughput when the allocation unit BW _alloc (s) is allocated by the method according to the embodiment of the present invention (the method according to the flowchart shown in FIG. 5) It has been found that the improvement is greater than the total throughput when the allocation unit BW _alloc (s) is allocated.

FIG. 9 is a flowchart for explaining the operation of transmitter 100 shown in FIG. Referring to FIG. 9, when a series of operations is started, allocation apparatus 10 of transmitter 100 performs allocation unit BW _alloc (s) (s) by the above-described method according to the flowchart shown in any of FIGS. 5 to 7. That is, frequency resources are allocated to users (step S21).

  And it is determined whether a transmission signal is transmitted by both GFDM / OFDM (step S22).

When it is determined in step S22 that the transmission signal is transmitted by both GFDM / OFDM, the transmission units GFDM-1 to GFDM-j follow the GFDM in the allocated frequency resource (allocation unit BW _alloc (s)). A transmission signal is generated (step S23).

Further, the transmitters OFDM-1 to OFDM-i generate a transmission signal according to OFDM in the allocated frequency resource (allocation unit BW _alloc (s)) (step S24).

  Then, the transmission signal generated by GFDM and the transmission signal generated by OFDM are added and transmitted (step S25).

  On the other hand, when it is determined in step S22 that the transmission signal is not transmitted by both GFDM / OFDM, it is determined whether or not the transmission signal is transmitted by GFDM (step S26).

When it is determined in step S26 that a transmission signal is transmitted by GFDM, transmission units GFDM-1 to GFDM-j generate transmission signals according to GFDM in allocated frequency resources (allocation unit BW _alloc (s)). (Step S27).

  Then, the transmission signal generated by GFDM is transmitted (step S28).

On the other hand, when it is determined in step S26 that the transmission signal is not transmitted by GFDM, the transmission units OFDM-1 to OFDM-i transmit the transmission signal according to OFDM in the allocated frequency resource (allocation unit BW _alloc (s)). Generate (step S29).

  Then, the transmission signal generated by OFDM is transmitted (step S30).

  Then, after any of step S25, step S28, and step S30, the operation of transmitter 100 ends.

  Since the transmitter 100 includes the assigning device 10, frequency resources are efficiently assigned to users in consideration of QoS and / or interference of each traffic, and a transmission signal is transmitted by GFDM and / or OFDM.

  Therefore, the throughput can be greatly improved as described above.

  In the embodiment of the present invention, the operation of the assignment device 10 may be executed by software.

  In this case, the allocation apparatus 10 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory).

  The ROM includes a program Prog_A including steps S1 to S19 of the flowchart shown in FIG. 5, a program Prog_B including steps S1 to S8 and S11 to S19 of the flowchart shown in FIG. 6, and steps S1 to S10 and S11A of the flowchart shown in FIG. , S12, S13A, S14 to S19, a program Prog_C is stored.

  The RAM temporarily stores a calculation result in the middle of the calculation of the metric Metric.

  Then, the CPU reads and executes one of the programs Prog_A to Prog_C from the ROM, and allocates frequency resources to GFDM users and / or OFDM users by the method described above.

  Further, any of the programs Prog_A to Prog_C may be recorded and distributed on a recording medium such as a CD or a DVD.

  When a personal computer is loaded with a recording medium that records any of the programs Prog_A to Prog_C, the CPU reads and executes one of the programs Prog_A to Prog_C from the recording medium, and performs the GFDM user and / or OFDM by the above-described method. Allocate frequency resources to users.

  Therefore, the recording medium on which the program Prog is recorded is a computer (CPU) readable recording medium.

  In the above description, the allocating device 10 has been described to efficiently allocate frequency resources in a wireless communication environment in which GFDM and OFDM are mixed. However, the embodiment of the present invention is not limited thereto. In general, the allocating device 10 may be any device that can efficiently allocate frequency resources by the above-described method in a wireless communication environment in which the first wireless communication method and the second wireless communication method are mixed.

Therefore, according to the embodiment of the present invention, the allocating device includes a first wireless communication system including a guard band and an allocation target band that are not used for wireless communication by a predetermined user, and a second wireless communication system. An allocation device that performs efficient allocation of radio communication resources in a radio communication environment in which
A dividing unit that divides the continuous band into one or more allocation units that are frequency resources when the continuous band included in the unused band including the guard band is equal to or more than the allocation unit having a predetermined bandwidth;
The value obtained by dividing the instantaneous channel capacity by the average channel capacity, which is the average of the channel capacity in a predetermined time unit, increases as the traffic priority increases, and decreases as the traffic priority decreases. A calculation means for performing a calculation process for calculating a multiplication result obtained by multiplying the correction term as an evaluation value of a user to be allocated for all the users to be allocated;
An allocation unit that executes at least one of the first and second allocation processes for all allocation units may be provided.

  The first allocation process is a process of allocating an allocation unit to the user having the maximum evaluation value, and the second allocation process is a difference from the received signal strength of the user allocated to the adjacent band of the allocation unit. Is a process of allocating an allocation unit to a user having a received signal strength with a sub-threshold value equal to or less than a threshold or a user having the same subcarrier width as that of a user allocated to an adjacent band of the allocation unit.

Further, according to the embodiment of the present invention, the program includes a first wireless communication system including a guard band and an allocation target band that are not used for wireless communication by a predetermined user, and a second wireless communication system. A program for causing a computer to execute efficient allocation of wireless communication resources in a mixed wireless communication environment,
A first step in which the dividing means divides the continuous band into one or more allocation units that are frequency resources when the continuous band included in the unused band including the guard band is equal to or more than the allocation unit having a predetermined bandwidth. When,
The calculation means divides the instantaneous channel capacity by the average channel capacity, which is the average of the channel capacity in a predetermined time unit, and the value increases as the traffic priority increases, and the traffic priority decreases. A second step of executing, for all users to be allocated, a calculation process for calculating a multiplication result obtained by multiplying a correction term that decreases in accordance with the evaluation value of the user to be allocated as an evaluation value;
The assigning unit may cause the computer to execute a third step of executing at least one of the first and second assignment processes for all assignment units.

  The first allocation process is a process of allocating an allocation unit to the user having the maximum evaluation value, and the second allocation process is a difference from the received signal strength of the user allocated to the adjacent band of the allocation unit. Is a process of allocating an allocation unit to a user having a received signal strength with a sub-threshold value equal to or less than a threshold or a user having the same subcarrier width as that of a user allocated to an adjacent band of the allocation unit.

  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 allocating device, a transmitter including the same, a program for causing a computer to execute, and a computer-readable recording medium on which the program is recorded.

  DESCRIPTION OF SYMBOLS 10 allocation apparatus, 11 division | segmentation means, 12 calculating means, 13 allocation means, 100 transmitter, 101,111 encoding part, 102,112 symbol mapping part, 103,113 serial parallel converter, 104-1 to 104-K up Sampling processing unit, 105-1 to 105-K waveform shaping filter, 106-1 to 106-K subcarrier up converter, 107, 120 adder, 106, 116 CP unit, 114 IFFT, 115 parallel serial converter, 121 DA Converter, 122 wireless unit, 123 antenna.

Claims (16)

Efficient allocation of radio communication resources in a radio communication environment in which a first radio communication system including a guard band and an allocation target band that are not used for radio communication by a predetermined user and a second radio communication system coexist An assigning device to perform,
Division means for dividing the continuous band into the allocation units when the continuous band included in the unused band including the guard band is equal to or more than the allocation unit having a predetermined bandwidth;
The value obtained by dividing the instantaneous channel capacity by the average channel capacity, which is the average of the channel capacity in a predetermined time unit, increases as the traffic priority increases, and decreases as the traffic priority decreases. A calculation means for performing a calculation process for calculating a multiplication result obtained by multiplying the correction term as an evaluation value of a user to be allocated for all the users to be allocated;
Allocation means for executing at least one of the first and second allocation processes for all allocation units;
The first allocation process is a process of allocating the allocation unit to a user having the largest evaluation value;
In the second allocation process, a user having a received signal strength whose difference from a received signal strength of a user allocated to the adjacent band of the allocation unit is equal to or less than a threshold value, or allocated to the adjacent band of the allocation unit An allocation apparatus, which is a process of allocating the allocation unit to a user having a subcarrier width that is the same as the subcarrier width of the selected user.   In the first and second allocation processes, the allocation unit allocates the allocation unit only to a user who performs wireless communication by the second wireless communication method when the allocation unit exists in the guard band. When the allocation unit exists in an unused band other than the guard band, the allocation is performed to a user who performs wireless communication by the first wireless communication method and / or a user who performs wireless communication by the second wireless communication method. The assigning device according to claim 1, wherein the assigning device assigns units.   3. The allocation device according to claim 1, wherein the allocation unit executes both the first and second allocation processes for all allocation units.   In the first allocation process or the second allocation process, the allocation unit may allocate an allocation amount among users allocated to adjacent bands of the unused band when there is a band that is not divisible by the allocation unit. The allocation apparatus according to any one of claims 1 to 3, wherein a bandwidth that cannot be divided by the allocation unit is allocated to a user having the smallest number.   The allocation unit allocates the allocation unit to a user having the highest traffic priority when there are a plurality of users having the maximum evaluation value in the first allocation process or the second allocation process. The assignment device according to any one of claims 1 to 4.   The calculation means, in the calculation process, uses a multiplication result obtained by dividing the instantaneous reception signal strength by an average reception signal strength, which is an average of reception signal strengths in a predetermined time unit, multiplied by the correction term as the evaluation value. 6. The assigning device according to claim 1, wherein the assigning device performs calculation.   The computing means computes, as the evaluation value, a multiplication result obtained by multiplying a division result obtained by dividing an instantaneous throughput by an average throughput, which is an average of throughputs in a predetermined time unit, by the correction term in the calculation processing. The allocation device according to any one of claims 5 to 6.   A transmitter provided with the allocation apparatus of any one of Claims 1-7. Efficient allocation of radio communication resources in a radio communication environment in which a first radio communication system including a guard band and an allocation target band that are not used for radio communication by a predetermined user and a second radio communication system coexist A program for causing a computer to execute,
A first step in which the dividing means divides the continuous band into the allocation units when the continuous band included in the unused band including the guard band is equal to or more than the allocation unit having a predetermined bandwidth;
The calculation means divides the instantaneous channel capacity by the average channel capacity, which is the average of the channel capacity in a predetermined time unit, and the value increases as the traffic priority increases, and the traffic priority decreases. A second step of executing, for all users to be allocated, a calculation process for calculating a multiplication result obtained by multiplying a correction term that decreases in accordance with the evaluation value of the user to be allocated as an evaluation value;
An allocating means for causing the computer to execute a third step of executing at least one of the first and second allocation processes for all allocation units;
The first allocation process is a process of allocating the allocation unit to a user having the largest evaluation value;
In the second allocation process, a user having a received signal strength whose difference from a received signal strength of a user allocated to the adjacent band of the allocation unit is equal to or less than a threshold value or an adjacent band of the allocation unit is allocated. The program for making a computer perform the process which is the process which allocates the said allocation unit to the user who has the same subcarrier width as the subcarrier width of the user.   In the third step, in the first and second allocation processes, the allocation unit is a user who performs radio communication by the second radio communication method when the allocation unit exists in the guard band. The allocation unit is allocated only to the user, and when the allocation unit exists in an unused band other than the guard band, the user who performs wireless communication by the first wireless communication method and / or the wireless device by the second wireless communication method. The program for making the computer run of Claim 9 which allocates the said allocation unit to the user who communicates.   11. The program for causing a computer according to claim 9 or 10 to execute, in the third step, the allocation unit executes both the first and second allocation processes for all allocation units.   In the first allocation process or the second allocation process, the allocation unit may allocate an allocation amount among users allocated to adjacent bands of the unused band when there is a band that is not divisible by the allocation unit. 12. The program for causing a computer to execute according to any one of claims 11 to 11, wherein a bandwidth that cannot be divided by the allocation unit is allocated to a user having the smallest number.   The allocation unit allocates the allocation unit to a user having the highest traffic priority when there are a plurality of users having the maximum evaluation value in the first allocation process or the second allocation process. A program for causing a computer according to any one of claims 9 to 12 to be executed.   The calculation means, in the calculation process, uses a multiplication result obtained by dividing the instantaneous reception signal strength by an average reception signal strength, which is an average of reception signal strengths in a predetermined time unit, multiplied by the correction term as the evaluation value. The program for making the computer of any one of Claim 9 to 13 perform a calculation perform.   The calculation means calculates, as the evaluation value, a multiplication result obtained by multiplying a division result obtained by dividing an instantaneous throughput by an average throughput, which is an average of throughputs in a predetermined time unit, by the correction term in the calculation processing. The program for making the computer of any one of Claim 13 run.   The computer-readable recording medium which recorded the program of any one of Claims 9-15.

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