CONTROL DEVICE, SYSTEM, METHOD, AND PROGRAM

Abstract

To provide a control apparatus, a system, a method, and a program capable of properly assigning a radio resource on the basis of quality criterions.SOLUTION: A control apparatus 11 comprises: a determination unit 111 which determines all usable uplink radio resources; and a control unit 112 which selects a predetermined uplink radio resource from among the all radio resources on the basis of uplink quality criterions of an uplink signal transmitted from a terminal 13 to a base station 12, and assigns the predetermined uplink radio resource as an uplink radio resource for transmitting the next uplink signal from the terminal 13 to the base station 12. The uplink quality criterions are an uplink bit error ratio before error correction of an uplink signal and a throughput value of the uplink signal.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a control device, a system, a method, and a program, and more particularly to a control device, a system, a method, and a program that are capable of appropriately allocating radio resources based on a quality determination criterion. [Background technology]

[0002] In local 5G systems, the method of allocating radio frequencies to base stations generally involves calculating the amount of radio resources required based on the throughput value required for each cell, and then allocating the optimal radio frequency based on the amount of radio resources. However, after the system begins operation, changes in the radio wave environment can cause interference if the initially allocated radio frequency is left unchanged, resulting in a decrease in the throughput value. Note that changes in the radio wave environment can be caused, for example, by interference due to repeated use of radio frequencies within the system itself or by interference from the same radio frequency from adjacent systems.

[0003] As a solution to the above problem, Patent Document 1 describes measuring the signal-to-interference ratio (SIR) as a quality criterion, and reallocating the initially allocated radio frequency to a radio frequency with less interference if the SIR falls below a threshold. However, because the SIR fluctuates significantly due to the effects of multipath fading, even if the SIR falls below the threshold, the throughput value may be maintained without decreasing. Therefore, the method described in Patent Document 1 may unnecessarily reallocate (change) the radio frequency even if the throughput value is maintained. Furthermore, communication is interrupted during the reallocation of the radio frequency, resulting in a decrease in the throughput value, so further improvement is required.

[0004] Patent Document 2 describes an error index as a quality judgment criterion. Specifically, paragraph 0100 of Patent Document 2 states that "the error index may include, for example, a CRC error rate, which is the rate of errors detected by a CRC (Cyclic Redundancy Check) for each communication frame, the number of retransmissions to recover from communication frame losses, the number of RTS (Request to Send) transmissions during frame transmission and retransmission, and the number of terminals that have repeatedly associated and deassociated."

[0005] Paragraph 0066 of Patent Document 3 states, "Since the throughput at AP-a is determined by the relationship between bandwidth b, primary channel c, and the APs sharing the channel, it is necessary to use a utility function U that evaluates the throughput according to bandwidth b and primary channel c at AP-a, and select bandwidth b and primary channel c according to utility function U." [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2021-141571 [Patent Document 2] Japanese Patent Application Laid-Open No. 2017-85421 [Patent Document 3] Japanese Patent Application Laid-Open No. 2017-175204 Summary of the Invention [Problem to be solved by the invention]

[0007] As mentioned above, when the radio frequencies initially assigned based on the SIR are reallocated after the system starts operation, the SIR may fall below the threshold but the throughput value may be maintained. In such cases, there is a problem that unnecessary reallocation of radio frequencies may actually lower the throughput value.

[0008] An object of the present disclosure is to provide a control device, a system, a method, and a program that solve the above-mentioned problems. [Means for solving the problem]

[0009] The control device according to the present disclosure includes: a determination unit for determining all available uplink radio resources; a control unit that selects a predetermined uplink radio resource from among all the uplink radio resources based on an uplink quality criterion of an uplink signal transmitted from the terminal to a base station, and allocates the predetermined uplink radio resource as an uplink radio resource for transmitting a next uplink signal from the terminal to the base station; Equipped with The upstream quality judgment criteria are the upstream bit error rate of the upstream signal before error correction and the upstream throughput value of the upstream signal.

[0010] The system according to the present disclosure comprises: A base station, a terminal that communicates with the base station, and a control device that controls the base station, The terminal a terminal transmitting unit that transmits an uplink signal to the base station using radio resources; The base station a base station calculation unit that calculates an uplink quality judgment criterion for the uplink signal; a base station notification unit that notifies the control device of the uplink quality judgment criterion, The control device a determiner for determining all available radio resources; a control unit that selects a predetermined radio resource from among all the radio resources based on the uplink quality determination criterion, and allocates the predetermined radio resource as a radio resource for transmitting a next uplink signal from the terminal to the base station, The upstream quality judgment criteria are the upstream bit error rate before error correction of the upstream signal and the throughput value of the upstream signal.

[0011] The method according to the present disclosure comprises: determining all available radio resources; selecting a predetermined radio resource from among all the radio resources based on an uplink quality criterion of an uplink signal transmitted from the terminal to the base station, and allocating the predetermined radio resource as a radio resource for transmitting a next uplink signal from the terminal to the base station; Equipped with The upstream quality judgment criteria are the upstream bit error rate of the upstream signal before error correction and the upstream throughput value of the upstream signal.

[0012] The program according to the present disclosure is determining all available radio resources; selecting a predetermined radio resource from among all the radio resources based on an uplink quality criterion of an uplink signal transmitted from the terminal to the base station, and allocating the predetermined radio resource as a radio resource for transmitting a next uplink signal from the terminal to the base station; on the computer, The upstream quality judgment criteria are the upstream bit error rate of the upstream signal before error correction and the upstream throughput value of the upstream signal. [Effects of the Invention]

[0013] According to the present disclosure, it is possible to provide a control device, a system, a method, and a program that are capable of appropriately allocating radio resources based on a quality determination criterion. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a block diagram illustrating a control device according to a first embodiment. [Figure 2] 1 is a block diagram illustrating a system according to a first embodiment. [Figure 3] 4 is a flowchart illustrating an operation of the control device according to the first embodiment. [Figure 4] FIG. 10 is a block diagram illustrating a system according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding elements are designated by the same reference numerals, and for clarity of explanation, duplicate explanations will be omitted as necessary.

[0016] [Embodiment 1] <Summary> FIG. 1 is a block diagram illustrating a control device according to the first embodiment. For convenience of explanation, a base station and a terminal are also shown in FIG.

[0017] As shown in FIG. 1, a system 10 according to the first embodiment includes a base station 12, a terminal 13 that communicates with the base station 12, and a control device 11 that controls the base station 12.

[0018] The terminal 13 has a terminal transmitter 131 that uses radio resources to transmit uplink signals to the base station 12. The radio resources are, for example, radio frequencies. Radio frequencies may also be abbreviated as frequencies.

[0019] The base station 12 includes a base station calculation unit 121 and a base station notification unit 122. The base station calculation unit 121 calculates an uplink quality criterion for the uplink signal. Here, the uplink quality criterion is the uplink bit error rate of the uplink signal before error correction and the throughput value of the uplink signal. Therefore, the base station calculation unit 121 calculates the uplink bit error rate of the uplink signal before error correction. In addition, the base station calculation unit 121 measures the throughput value of the uplink signal.

[0020] The base station notifying unit 122 notifies the control device 11 of the uplink quality determination criterion. The uplink quality determination criterion is requested, for example, for each base station 12. The uplink signal is received from the terminal 13 and acquired.

[0021] The control device 11 includes a determination unit 111 and a control unit 112. The determination unit 111 determines all available radio resources. The control unit 112 selects a predetermined radio resource from among all the radio resources based on an uplink quality evaluation criterion notified by the base station 12. Thereafter, the control unit 112 allocates the selected predetermined radio resource as a radio resource for transmitting the next uplink signal from the terminal 13 to the base station 12.

[0022] If the uplink bit error rate is equal to or greater than a predetermined uplink error rate and the uplink throughput value is less than a predetermined uplink throughput value, the control unit 112 selects a predetermined uplink radio resource and allocates it as the radio resource for transmitting the next uplink signal.

[0023] If the uplink bit error rate is equal to or greater than a predetermined uplink error rate and the uplink throughput value is equal to or greater than a predetermined uplink throughput value, the control unit 112 does not select and allocate the predetermined uplink radio resource.

[0024] Furthermore, the control device 11 may be adapted to handle not only upstream signals but also downstream signals. Specifically, the determination unit 111 determines all available downlink radio resources.

[0025] The control unit 112 selects a predetermined downlink radio resource from among all downlink radio resources based on a downlink quality determination criterion of the downlink signal transmitted from the base station 12 to the terminal 13. The control unit 112 allocates the selected predetermined downlink radio resource as a downlink radio resource for transmitting the next downlink signal from the base station 12 to the terminal 13.

[0026] The downstream quality judgment criteria are the downstream bit error rate of the downstream signal before error correction and the downstream throughput value of the downstream signal. The downstream bit error rate is calculated by terminal 13. Terminal 13 notifies the calculated downstream bit error rate to control device 11 via base station 12. The downstream throughput value is measured by terminal 13. Terminal 13 notifies the measured downstream throughput value to control device 11 via base station 12.

[0027] Furthermore, the frequency of the uplink radio resource and the frequency of the downlink radio resource may be the same frequency.

[0028] Here, the uplink radio resource and / or the downlink radio resource may be referred to as a "radio resource." The uplink signal and / or the downlink signal may be referred to as a "signal." The uplink quality assessment criterion and / or the downlink quality assessment criterion may be referred to as a "quality assessment criterion." The uplink bit error rate and / or the downlink bit error rate may be referred to as a "bit error rate." The uplink throughput value and / or the downlink throughput value may be referred to as a "throughput value."

[0029] <Detailed configuration> FIG. 2 is a block diagram illustrating a system according to the first embodiment. In Fig. 2, a local 5G system will be described as an example of a system according to the first embodiment. However, the first embodiment is not limited to this and may be applied to systems other than the local 5G system. Also, in Fig. 2, time division duplex (TDD) will be described as an example. However, the first embodiment is not limited to this and may be applied to frequency division duplex (FDD), for example.

[0030] As shown in Figure 2, the local 5G system (system 10) includes a network management system (NMS) 14 and a core network server 15. The network management system 14 controls and monitors the entire network. The core network server 15 processes transmission and reception of communication user data between terminals 13 and establishes communication.

[0031] The system 10 includes a plurality of base stations 12 and a plurality of terminals 13 that communicate wirelessly with the base stations 12. In this example, the base stations 12 are base station 12a, base station 12b, and base station 12c, and the terminals 13 are terminal 13a and terminal 13b.

[0032] Between base station 12a and terminal 13a, frequency f1 is allocated for downlink signals and uplink signals. Between base station 12a and terminal 13b, frequency f1 is allocated for uplink signals. Regarding interference due to the use of a repeating frequency within system 10, at base station 12a, frequency f1 of the uplink signal from terminal 13a and frequency f1 of the uplink signal from terminal 13b interfere with each other.

[0033] Between base station 12c and terminal 13a, frequency f1 is allocated for downlink signals. Base station 12b is allocated frequency f2 for downlink signals. Regarding interference due to the use of a repeating frequency within system 10, frequency f1 of the downlink signal from base station 12a and frequency f1 of the downlink signal from base station 12c interfere with each other at terminal 13a.

[0034] The CU / DU shown in Fig. 2 corresponds to the control device shown in Fig. 1. The CU / DU 11 has a central unit (CU) having a data processing function and a distribution unit (DU) having a radio signal processing function. The base station 12 transmits and receives user data to and from the terminal 13 by using radio communication using radio frequencies. The service area of ​​a base station may also be called a cell. The service area of ​​base station 12a is called cell A, the service area of ​​base station 12b is called cell B, and the service area of ​​base station 12c is called cell C.

[0035] <Operation> FIG. 3 is a flowchart illustrating the operation of the control device according to the first embodiment. In explaining the operation of the control device, an uplink signal will be taken as an example, but the present invention is not limited to this. The first embodiment is not limited to uplink signals, and can be similarly applied to downlink signals. For simplicity, the terms "uplink" and "downlink" are omitted in Figure 3. Therefore, for example, the bit error rate indicates the uplink bit error rate or the downlink bit error rate. Note that the bit error rate indicates the bit error rate before error correction.

[0036] As shown in FIG. 3, the CU / DU 11 calculates the amount of radio resources required from the base station 12a (cell A) (step S101).

[0037] The CU / DU 11 performs a frequency allocation process to allocate the optimal frequency f1 to the base station 12a (step S102). As a result, the base station 12a communicates with the terminal 13a, which is the communication target, using the frequency f1 in the TDD system so as not to cause interference.

[0038] However, because frequency resources (radio resources) are limited, for example, when a cell such as base station 12c (cell C) is added as the service area expands, the same frequency f1 as the frequency used in cell A may be allocated to cell C. In this case, when arranging cell C, a frequency allocation is performed to reduce interference with cell A as much as possible, but because frequency resources are limited, frequency f1 is allocated, making it difficult to completely eliminate interference.

[0039] As a result, the downlink signal transmission wave of cell A and the downlink signal transmission wave of cell C interfere with each other at frequency f1 (see FIG. 2), affecting the downlink communication between cell A and terminal 13a. Also, in cell A, the uplink signal transmission wave of terminal 13a and the uplink signal transmission wave of terminal 13b interfere with each other at frequency f1 (see FIG. 2), affecting the uplink communication between cell A and terminal 13a. As a result, the downlink throughput value and / or the uplink throughput value decreases.

[0040] 3, in the first embodiment, cell A calculates the uplink bit error rate before error correction and notifies the CU / DU 11. The CU / DU 11 performs decision 1 based on a comparison between the uplink bit error rate acquired from cell A and a predetermined uplink error rate (a preset threshold value) (step S103).

[0041] If the result of decision 1 in step S103 is that the uplink bit error rate of cell A is less than the threshold (step S103: No), the frequency allocated in step S102 is not changed.

[0042] If the result of determination 1 in step S103 is that the uplink bit error rate of cell A is equal to or greater than the threshold (step S103: Yes), the CU / DU 11 proceeds to a determination based on the quality determination criterion and a frequency reallocation process. The determination based on the quality determination criterion and a frequency reallocation process include determination 2 (step S104), determination 3 (step S105), and / or frequency reallocation (step S106).

[0043] The quality criterion based decision and frequency reallocation process will now be described in detail. If the uplink bit error rate of cell A is equal to or greater than a predetermined uplink error rate (threshold value) (step S103: Yes), the CU / DU 11 selects an operation mode (step S104). In step S104, the CU / DU 11 determines whether to change the frequency (re-allocate the frequency) before the uplink throughput value decreases.

[0044] If the CU / DU 11 decides not to change the frequency before the uplink throughput value decreases (step S104: No), the CU / DU 11 proceeds to step S105, which is the process of decision 3. In step S105, the CU / DU 11 compares the uplink throughput value with a predetermined uplink throughput value (threshold value).

[0045] If the uplink throughput value is less than the threshold (step S105: Yes), the CU / DU 11 performs frequency reallocation processing (step S106). If the uplink throughput value is equal to or greater than the threshold (step S105: No), the CU / DU 11 returns to step S103.

[0046] If the CU / DU 11 performs frequency reallocation before the uplink throughput value decreases (step S104: Yes), the CU / DU 11 performs frequency reallocation processing (step S106).

[0047] In the processing flow of the CU / DU 11 (see FIG. 3), the judgments 1 to 3 are made according to predetermined thresholds, but a hysteresis value may be provided to suppress fluctuations (chattering) in the judgments.

[0048] <Effects> In the first embodiment, the frequency change timing (frequency reallocation timing) can be changed by selecting an operation mode in advance as shown in decision 2 (step S104).

[0049] An increase in the uplink bit error rate affects the uplink throughput value. Under certain service conditions, the uplink throughput value may not yet decrease as the uplink bit error rate increases, but the uplink throughput value may show signs of a downward trend. In such a case, when the uplink throughput value shows signs of a downward trend, it may be desirable to immediately perform frequency reallocation processing. In such a case, the frequency reallocation processing is performed (step S106) without performing decision 3 (step S105). That is, the processing of step S106 is performed from (step S104: Yes).

[0050] On the other hand, if the uplink bit error rate is equal to or greater than the threshold (step S103: Yes) and it is desired to perform frequency reallocation processing after checking the uplink throughput value, then judgment 2 (step S104) is set to No. That is, the operation mode is selected to be a mode in which the frequency is not changed before the uplink throughput value decreases. Thereafter, judgment 3 (step S105) is performed, and if the uplink throughput value becomes less than the threshold (step S105: Yes), frequency reallocation processing is performed (step S106). This allows communication between terminal 13a and base station 12a (see FIG. 2) to be continued to the limit.

[0051] <Effects> The CU / DU 11 according to the first embodiment uses the bit error rate and the throughput value before error correction as the quality criteria, instead of the SIR. The CU / DU 11 performs at least one of the decisions 1 to 3 based on the quality criteria, and controls the frequency of the base station 12 (cell) based on the decision result (see FIG. 3). Specifically, the CU / DU 11 selects a predetermined wireless resource from among all wireless resources based on the quality criteria (the bit error rate and the throughput value before error correction), and allocates the predetermined wireless resource as the wireless resource to be used for communication between the terminal 13 and the base station 12.

[0052] This reduces the number of unnecessary frequency changes, thereby reducing the duration and number of communication interruptions due to frequency changes and improving frequency utilization efficiency.

[0053] As a result, it is possible to provide a control device, a system, a method, and a program that are capable of appropriately allocating radio resources based on a quality evaluation criterion.

[0054] In the first embodiment, the control device 11 controls the allocation of radio resources (frequencies). The control device 11 can execute the frequency allocation control by hardware (HW) processing, and therefore the control processing time can be shortened compared to when the frequency allocation including the quality judgment is executed by the NMS 14.

[0055] <Features> The features of the first embodiment are described below. In the first embodiment, the bit error rate and throughput value before error correction are used as the quality criteria, instead of the SIR. The control flow of the quality evaluation criteria uses the flow from step S101 to step S106 shown in FIG. The CU / DU 11 performs quality judgment and controls the frequency of the base station (cell) based on the judgment result.

[0056] [Embodiment 2] FIG. 4 is a block diagram illustrating a system according to the second embodiment. FIG. 4 is a block diagram illustrating details of a system according to the second embodiment.

[0057] As shown in FIG. 4, the second embodiment differs from the first embodiment in that frequencies are allocated so as to reduce the influence of interference from adjacent systems 10n, rather than interference caused by the use of a repetitive frequency within the system 10 itself.

[0058] The CU / DU 11 calculates the amount of radio resources required from the base station 12d (cell D).

[0059] The CU / DU 11 performs a frequency allocation process to allocate, for example, frequency f1 to the base station 12d as an optimal frequency. As a result, the base station 12d communicates with the terminal 13c, which is the communication target, using frequency f1 in the TDD system so as not to cause interference.

[0060] Here, when an adjacent other system 10n is constructed and a base station 12f (cell F) is added, the same frequency f1 as the frequency used in cell D may be assigned to cell F. In this case, since cell D and cell F are different systems, it is difficult to know each other's frequency allocation, and interference occurs between the frequency f1 used by cell D and the frequency f1 used by cell F. Even if it were possible to know each other's frequency allocation, frequency resources are limited, so cell D still uses frequency f1 and cell F still uses frequency f1, making it difficult to completely eliminate interference.

[0061] As a result, the transmission wave of the downlink signal from cell D interferes with the transmission wave of the downlink signal from cell F (see FIG. 4), affecting the downlink communication between cell D and terminal 13c. Also, the transmission wave of the uplink signal from terminal 13c interferes with the transmission wave of the uplink signal from terminal 13d (see FIG. 4), affecting the uplink communication between cell D and terminal 13c. This reduces the downlink and / or uplink throughput value.

[0062] In this case, the control flowchart shown in FIG. 3 can be applied in the same way as for interference caused by the use of a repetition frequency within the own system (see FIG. 2).

[0063] Therefore, in the second embodiment, cell D calculates the uplink bit error rate before error correction and notifies the CU / DU 11. CU / DU 11 performs decision 1 based on a comparison between the uplink bit error rate from cell D and a predetermined uplink error rate (a preset threshold value).

[0064] If the result of decision 1 is that the uplink bit error rate of cell D is less than the threshold, the initially allocated frequency is not changed.

[0065] If the uplink bit error rate of cell D is equal to or greater than the threshold, the process proceeds to frequency reallocation. At this time, the frequency change timing can be changed by selecting the operation mode of decision 2 in advance.

[0066] An increase in the upstream bit error rate affects the upstream throughput value. Under certain service conditions, even if the upstream throughput value does not decrease as the upstream bit error rate increases, there may be signs of a downward trend in the upstream throughput value. In such cases, there may be cases where it is desirable to immediately perform frequency reallocation processing when a sign of a downward trend in the upstream throughput value is observed. In such cases, the frequency reallocation processing is performed without performing decision 3.

[0067] On the other hand, if the uplink bit error rate is equal to or greater than the threshold and it is desired to perform frequency reallocation processing after checking the uplink throughput value, then decision 2 is set to No. That is, an operation mode is selected in which the frequency is not changed before the uplink throughput value drops. Thereafter, decision 3 is made, and if the uplink throughput value falls below the threshold, frequency reallocation processing is performed. This allows communication between terminal 13c and base station 12d (see FIG. 4) to be continued to the limit.

[0068] In the above embodiment, the present invention has been described as being configured as hardware, but the present invention is not limited to this. The present invention can also be realized by having a CPU (Central Processing Unit) execute a computer program to perform the processing of each component.

[0069] In the above embodiments, the program can be stored and supplied to a computer using various types of non-transitory computer-readable media. Non-transitory computer-readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (specifically, flexible disks, magnetic tapes, and hard disk drives), magneto-optical recording media (specifically, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / Ws, semiconductor memories (specifically, mask ROMs, PROMs (Programmable ROMs), and EPROMs (Erasable PROMs)), flash ROMs, and RAMs (Random Access Memory). The program may also be supplied to a computer by various types of transitory computer-readable media. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. The transitory computer-readable media can supply the program to a computer via a wired communication path such as an electric wire or optical fiber, or via a wireless communication path.

[0070] Additionally, although operations are depicted in a particular order, this should not be understood as requiring such operations to be performed in the particular order or sequential order depicted, or that all of the depicted operations be performed, to achieve desirable results. In certain situations, multitasking and parallel processing may be advantageous. Similarly, although details of several specific embodiments are included in the above discussion, these should not be construed as limitations on the scope of the disclosure, but rather as descriptions of features specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable combination.

[0071] Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.

[0072] The present invention is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the invention.

[0073] A part or all of the above-described embodiments can be described as, but not limited to, the following supplementary notes. (Appendix 1) a determination unit for determining all available uplink radio resources; a control unit that selects a predetermined uplink radio resource from among all the uplink radio resources based on an uplink quality criterion of an uplink signal transmitted from the terminal to the base station, and allocates the predetermined uplink radio resource as an uplink radio resource for transmitting a next uplink signal from the terminal to the base station; Equipped with the upstream quality judgment criteria are an upstream bit error rate before error correction of the upstream signal and an upstream throughput value of the upstream signal; Control device. (Appendix 2) the control unit selects and allocates the predetermined uplink radio resource when the uplink bit error rate is equal to or greater than a predetermined uplink error rate and the uplink throughput value is less than a predetermined uplink throughput value. 10. The control device of claim 1. (Appendix 3) the control unit does not select and allocate the predetermined uplink radio resource when the uplink bit error rate is equal to or greater than the predetermined uplink error rate and the uplink throughput value is equal to or greater than the predetermined uplink throughput value. 3. The control device according to claim 2. (Appendix 4) The uplink quality determination criterion is required for each base station. 10. The control device of claim 1. (Appendix 5) The determination unit determines all available downlink radio resources; the control unit selects a predetermined downlink radio resource from among all the downlink radio resources based on a downlink quality determination criterion of a downlink signal transmitted from the base station to the terminal, and allocates the predetermined downlink radio resource as a downlink radio resource for transmitting a next downlink signal from the base station to the terminal; the downstream quality judgment criteria are a downstream bit error rate before error correction of the downstream signal and a downstream throughput value of the downstream signal; 10. The control device of claim 1. (Appendix 6) The frequency of the uplink radio resource and the frequency of the downlink radio resource are the same frequency. 6. The control device according to claim 5. (Appendix 7) A base station, a terminal that communicates with the base station, and a control device that controls the base station, The terminal a terminal transmitting unit that transmits an uplink signal to the base station using radio resources; The base station a base station calculation unit that calculates an uplink quality judgment criterion for the uplink signal; a base station notification unit that notifies the control device of the uplink quality judgment criterion, The control device a determiner for determining all available radio resources; a control unit that selects a predetermined radio resource from among all the radio resources based on the uplink quality determination criterion, and allocates the predetermined radio resource as a radio resource for transmitting a next uplink signal from the terminal to the base station, the upstream quality judgment criteria are an upstream bit error rate before error correction of the upstream signal and a throughput value of the upstream signal; system. (Appendix 8) the control unit selects and allocates the predetermined radio resource when the uplink bit error rate is equal to or greater than a predetermined uplink error rate and the uplink throughput value is less than a predetermined uplink throughput value. 7. The system of claim 7. (Appendix 9) determining all available radio resources; selecting a predetermined radio resource from among all the radio resources based on an uplink quality criterion of an uplink signal transmitted from the terminal to the base station, and allocating the predetermined radio resource as a radio resource for transmitting a next uplink signal from the terminal to the base station; Equipped with the upstream quality judgment criteria are an upstream bit error rate before error correction of the upstream signal and an upstream throughput value of the upstream signal; method. (Appendix 10) determining all available radio resources; selecting a predetermined radio resource from among all the radio resources based on an uplink quality criterion of an uplink signal transmitted from the terminal to the base station, and allocating the predetermined radio resource as a radio resource for transmitting a next uplink signal from the terminal to the base station; on the computer, the upstream quality judgment criteria are an upstream bit error rate before error correction of the upstream signal and an upstream throughput value of the upstream signal; program. [Explanation of symbols]

[0074] 10...System, own system 10n...Other adjacent systems 11, 11n...Control device, CU / DU 111...Decision Section 112...Control unit 12, 12a, 12b, 12c, 12d, 12e, 12f...base station 121...Base station calculation unit 122...Base station notification section 13, 13a, 13b, 13c, 13d...Terminal 131...Terminal transmitter 14, 14n...Network Management Systems 15, 15n... Core network server

Claims

1. a determination unit for determining all available uplink radio resources; a control unit that selects a predetermined uplink radio resource from among all the uplink radio resources based on an uplink quality determination criterion of an uplink signal transmitted from a terminal to a base station, and allocates the predetermined uplink radio resource as an uplink radio resource for transmitting a next uplink signal from the terminal to the base station; Equipped with the upstream quality judgment criteria are an upstream bit error rate before error correction of the upstream signal and an upstream throughput value of the upstream signal, the control unit, when the uplink bit error rate is equal to or greater than a predetermined uplink error rate and the uplink throughput value is less than a predetermined uplink throughput value, selects and allocates the predetermined uplink radio resource. Control device.

2. the control unit does not select and allocate the predetermined uplink radio resource when the uplink bit error rate is equal to or greater than the predetermined uplink error rate and the uplink throughput value is equal to or greater than the predetermined uplink throughput value. The control device according to claim 1 .

3. The uplink quality criterion is required for each of the base stations. The control device according to claim 1 .

4. The determination unit determines all available downlink radio resources; the control unit selects a predetermined downlink radio resource from among all the downlink radio resources based on a downlink quality judgment criterion of a downlink signal transmitted from the base station to the terminal, and allocates the predetermined downlink radio resource as a downlink radio resource for transmitting a next downlink signal from the base station to the terminal; the downstream quality judgment criteria are a downstream bit error rate before error correction of the downstream signal and a downstream throughput value of the downstream signal; The control device according to claim 1 .

5. The frequency of the uplink radio resource and the frequency of the downlink radio resource are the same frequency. The control device according to claim 4.

6. A base station, a terminal that communicates with the base station, and a control device that controls the base station, The terminal includes: a terminal transmitting unit for transmitting an uplink signal to the base station using radio resources; The base station, a base station calculation unit for calculating an uplink quality judgment criterion of the uplink signal; a base station notification unit that notifies the control device of the upstream quality judgment criterion; The control device includes: a determination unit for determining all available radio resources; a control unit that selects a predetermined radio resource from among all the radio resources based on the uplink quality judgment criterion, and allocates the predetermined radio resource as a radio resource for transmitting a next uplink signal from the terminal to the base station, the upstream quality judgment criteria are an upstream bit error rate before error correction of the upstream signal and a throughput value of the upstream signal, the control unit, when the uplink bit error rate is equal to or greater than a predetermined uplink error rate and the uplink throughput value is less than a predetermined uplink throughput value, selects and allocates the predetermined radio resource. system.

7. determining all available radio resources; selecting a predetermined radio resource from among all the radio resources based on an uplink quality criterion of an uplink signal transmitted from the terminal to the base station, and allocating the predetermined radio resource as a radio resource for transmitting a next uplink signal from the terminal to the base station; Equipped with the upstream quality judgment criteria are an upstream bit error rate before error correction of the upstream signal and an upstream throughput value of the upstream signal, selecting and allocating the predetermined uplink radio resource when the uplink bit error rate is equal to or greater than a predetermined uplink error rate and the uplink throughput value is less than a predetermined uplink throughput value. method.

8. determining all available radio resources; selecting a predetermined radio resource from among all the radio resources based on an uplink quality criterion of an uplink signal transmitted from the terminal to the base station, and allocating the predetermined radio resource as a radio resource for transmitting a next uplink signal from the terminal to the base station; Run the following on your computer: the upstream quality judgment criteria are an upstream bit error rate before error correction of the upstream signal and an upstream throughput value of the upstream signal, and when the uplink bit error rate is equal to or greater than a predetermined uplink error rate and the uplink throughput value is less than a predetermined uplink throughput value, selecting and allocating the predetermined uplink radio resource. program.

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