JP7055835B2 - Controls, communication systems, programs, and control methods - Google Patents

Description

The present invention relates to control devices, communication systems, programs, and control methods.

Proportional Fair, MAX C / I (Maximum Carrier to Interference ratio), round robin and the like have been known as scheduling algorithms used by radio base stations (see, for example, Patent Document 1).
[Prior Art Document]
[Patent Document]
[Patent Document 1] Japanese Unexamined Patent Publication No. 2009-174565

According to the first aspect of the present invention, a control device is provided. The control device has a non-congestion condition indicating that the radio base station scheduling according to the first scheduling algorithm is not congested, and the throughput of the radio communication service provided to the user terminal by the radio base station is low. It may be provided with a determination unit for determining whether or not the low throughput condition indicating that the condition is satisfied. When the determination unit determines that the non-congestion condition and the low throughput condition are satisfied, the control device schedules the radio base station according to a second scheduling algorithm that prioritizes the edge user terminal over the first scheduling algorithm. May be provided with a control unit that controls the operation.

The second scheduling algorithm may be a scheduling algorithm that prioritizes a user terminal having a lower radio quality than the first scheduling algorithm. The second scheduling algorithm may be a scheduling algorithm in which the ratio of allocating resources to user terminals at the edge is higher than that of the first scheduling algorithm. The first scheduling algorithm may be Proportional Fair Low. The second scheduling algorithm may be Proportional Fair High. The second scheduling algorithm may be a Proportional Fair Medium.

The control device has a data acquisition unit that acquires communication status data related to the status of wireless communication by the wireless base station, and data storage that stores the communication status data, which is transmitted by the wireless base station at predetermined intervals. The determination unit may determine whether or not the non-congestion condition and the low throughput condition are satisfied based on the past communication status data of the radio base station. The determination unit indicates that the communication status data of the radio base station in the past second date and time corresponding to the first date and time indicates that the radio base station is not congested, and has a predetermined traffic threshold value. When it indicates that the session rate with lower communication traffic is lower than the predetermined threshold value, it may be determined that the non-congestion condition and the low throughput condition are satisfied at the first date and time. The communication status data indicates that the radio base station is not congested when the number of scheduling requests per 1 TTI (Transmission Time Interval) derived based on the communication status data is less than a predetermined threshold value. May be shown. Based on the communication status data stored in the data storage unit, the determination unit specifies a time zone in which the non-congestion condition and the low throughput condition are satisfied on the same day of the previous week of the day. Often, the control unit may control the radio base station to perform scheduling according to the second scheduling algorithm during the time zone of the day. The control unit may switch the schedule algorithm used by the radio base station from the second scheduling algorithm to the first scheduling algorithm at the timing when the time zone elapses.

The control device may include a data acquisition unit that acquires communication status data relating to the status of wireless communication by the wireless base station, which is transmitted by the wireless base station at predetermined periods, and the determination unit may include the determination unit. The communication status data acquired by the data acquisition unit at each predetermined period continuously indicates that the radio base station is not congested, and the traffic threshold is continuously predetermined. It may be determined that the non-congestion condition and the low throughput condition are satisfied when the communication traffic is lower than the above and indicates that the session rate is lower than the predetermined threshold value. The determination unit may determine whether or not the radio base station scheduling according to the second scheduling algorithm has transitioned from a non-congested state to a congested state, and the control unit may determine by the determination unit. The scheduling algorithm used by the radio base station determined to have entered the congested state may be switched from the second scheduling algorithm to the first scheduling algorithm. The determination unit may determine whether or not the radio base station scheduling according to the second scheduling algorithm has transitioned from a low throughput state to a non-low throughput state, and the control unit may determine. The schedule algorithm used by the radio base station determined to have transitioned to the non-low throughput state by the unit may be switched from the second scheduling algorithm to the first scheduling algorithm.

According to the second aspect of the present invention, a communication system including the control device and the radio base station is provided. According to the third aspect of the present invention, a program for making a computer function as the control device is provided.

According to a fourth aspect of the present invention, a control method performed by a computer is provided. The control method is a non-congestion condition indicating that the wireless base station scheduling according to the first scheduling algorithm is not congested, and the throughput of the wireless communication service provided to the user terminal by the wireless base station is low. It may be provided with a determination step of determining whether or not the low throughput condition indicating that the condition is satisfied. The control method schedules the radio base station according to a second scheduling algorithm that prioritizes the edge user terminal over the first scheduling algorithm when it is determined in the determination stage that the non-congestion condition and the low throughput condition are satisfied. It may be provided with a control step for controlling the operation.

The outline of the above invention does not list all the necessary features of the present invention. A subcombination of these feature groups can also be an invention.

An example of the communication system 10 is shown schematically. An example of the processing flow by the control device 100 is schematically shown. An example of the processing flow by the control device 100 is schematically shown. An example of the functional configuration of the control device 100 is schematically shown. It is explanatory drawing for demonstrating the control time when the control apparatus 100 performs plan control. An example of the hardware configuration of the computer 1200 that functions as the control device 100 is schematically shown.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention within the scope of the claims. Also, not all combinations of features described in the embodiments are essential to the means of solving the invention.

FIG. 1 schematically shows an example of the communication system 10. The communication system 10 includes a control device 100. The communication system 10 may include a radio base station 200. The communication system 10 may include a base station operation system 300.

The control device 100 according to the present embodiment manages a plurality of radio base stations 200. The control device 100 may control the radio base station 200 so as to optimize the radio communication service provided by the radio base station 200 to the plurality of user terminals 20.

The radio base station 200 may comply with any mobile communication method. The radio base station 200 conforms to, for example, an LTE (Long Term Evolution) communication system. The radio base station 200 may comply with a 3G (3rd Generation) communication method. The radio base station 200 may comply with a 5G (5th Generation) communication system. The radio base station 200 may comply with the mobile communication system after the 6G (6th Generation) communication system. Here, a case where the radio base station 200 conforms to the LTE communication method will be mainly described as an example.

The user terminal 20 may be any terminal as long as it can communicate with the wireless base station 200. For example, the user terminal 20 is a mobile phone such as a smartphone. The user terminal 20 may be a tablet terminal, a PC (Personal Computer), or the like. The user terminal 20 may be a so-called IoT (Internet of Thing) device. The user terminal 20 may include anything corresponding to so-called IoT (Internet of Everything).

The radio base station 200 may transmit statistical data 202 to the base station operation system 300 at predetermined intervals. Statistical data 202 may include various statistics within a predetermined period. The predetermined period may be described as ROP (Report Output Period). The radio base station 200 may transmit the statistical data 202 for each cell to the base station operation system 300. The base station operation system 300 may be, for example, a so-called EMS (Element Management System).

The radio base station 200 transmits statistical data 202 to the base station operation system 300 every 15 minutes, for example. The statistical data 202 may include communication status data or the like indicating the status of wireless communication by the wireless base station 200. The communication status data may include a Transport Time assigned by the radio base station 200 to the plurality of user terminals 20 in 15 minutes. The Transport Time may be the total number of schedulings assigned to the plurality of user terminals 20 by the radio base station 200 in 15 minutes. The communication status data may also include the number of successful incoming / outgoing calls, the number of failed incoming / outgoing calls, the number of call disconnections, the number of successful handovers, the number of failed handovers, the amount of traffic, and the throughput.

The base station operation system 300 transmits the statistical data 202 received from the radio base station 200 to the base station statistical information DB (the database may be referred to as a DB) 400. Each of the plurality of base station operation systems 300 may transmit statistical data 202 to the base station statistical information DB 400. Further, one base station operation system 300 that aggregates information of the plurality of base station operation systems 300 is arranged, and the one base station operation system 300 receives statistical data 202 from the plurality of base station operation systems 300. , May be transmitted to the base station statistical information DB 400. The base station statistical information DB 400 stores the received statistical data 202.

The control device 100 has a plurality of radio bases based on the statistical data 202 stored in the base station statistical information DB 400 and the setting information of each of the plurality of radio base stations 200 stored in the base station setting information DB 500. Station 200 may be controlled.

The base station setting information DB 500 stores base station information of a plurality of radio base stations 200. The base station information includes the setting information of the radio base station 200. The setting information includes information on various setting values of the radio base station 200. Examples of set values include scheduling algorithms, frequencies, antenna angles, output intensities, and the like. The setting information may include information on the vendor of the radio base station 200. The setting information may include information of a target for which the wireless base station 200 provides a wireless communication service.

The control device 100 causes, for example, a plurality of radio base stations 200 to perform scheduling according to the first scheduling algorithm. Then, the control device 100 refers to the statistical data 202 that is periodically uploaded to the base station statistical information DB 400, and indicates that the wireless base station 200 is not congested for each of the plurality of wireless base stations 200. It is determined whether or not the congestion condition and the low throughput condition indicating that the throughput of the wireless communication service provided to the user terminal 20 by the radio base station 200 is low are satisfied. Then, when the non-congestion condition and the low throughput condition are satisfied in the radio base station 200 of any one of the plurality of radio base stations 200, the control device 100 first schedules the radio base station 200. It controls so that scheduling is performed according to a second scheduling algorithm that prioritizes the edge user terminal over the algorithm.

The second scheduling algorithm may be a scheduling algorithm that prioritizes the user terminal 20 having a lower radio quality than the first scheduling algorithm. The second scheduling algorithm may be a scheduling algorithm in which the ratio of allocating resources to edge users is higher than that of the first scheduling algorithm.

For example, the first scheduling algorithm may be Proportional Fair Low and the second scheduling algorithm may be Proportional Fair High. Further, for example, the first scheduling algorithm may be Proportional Fair Low, and the second scheduling algorithm may be Proportional Fair Medium. Further, for example, the first scheduling algorithm may be Proportional Fair Medium, and the second scheduling algorithm may be Proportional Fair High.

The Proportional Fair may be a scheduling algorithm for allocating a radio resource to a user terminal whose instantaneous throughput expected when allocating the radio resource is larger than the average throughput up to that point.

Further, for example, the first scheduling algorithm may be MAX C / I (Maximum Carrier to Interference ratio), and the second scheduling algorithm may be Prototional Fair High, Prototional Fair Medium, or Prototional Fair. .. MAX C / I may be a scheduling algorithm that preferentially allocates radio resources to user terminals 20 having higher radio quality. For example, when the control device 100 causes the radio base station 200 to perform scheduling according to MAX C / I, the control device 100 turns on the Minimum Bit Rate.

The non-congestion condition may be any condition that can determine that the radio base station 200 is not congested. For example, the non-congestion condition is a condition that is satisfied when the number of schedules per TTI is lower than a predetermined threshold value. 1 TTI in LTE is 1 ms. The number of schedules per TTI is calculated, for example, by dividing the Transport Time included in the communication status data by ROP. Further, for example, the non-congestion condition is a condition that is satisfied when the PRB (Physical Response Block) usage rate of the radio base station 200 is lower than a predetermined threshold value.

The control device 100 may determine whether or not the radio base station 200 is congested based on the device information of the radio base station 200. For example, the control device 100 determines that the radio base station 200 is not congested when the CPU (Central Processing Unit) usage rate of the radio base station 200 is lower than a predetermined threshold value.

The low throughput condition may be any condition that can determine that the throughput of the wireless communication service provided to the user terminal 20 by the wireless base station 200 is low. For example, the low throughput condition is a condition that is satisfied when the session rate in which the communication traffic is lower than the predetermined traffic threshold value is lower than the predetermined threshold value. The control device 100 calculates the rate of less than 1 Mbps from the statistical data 202, for example, by using the distribution counter of the throughput. Then, when the rate of less than 1 Mbps is higher than the predetermined threshold value, it is determined that the low throughput condition is satisfied, and when it is lower than the threshold value, it is determined that the low throughput condition is not satisfied. The number of Mbps less than the rate to be used may be arbitrarily set.

The control device 100 may acquire setting information from the base station setting information DB 500 for the radio base station 200 satisfying the non-congestion condition and the low throughput condition, and may determine whether or not the scheduling algorithm can be changed. .. Whether or not the scheduling algorithm can be changed may be set for each vendor of the radio base station 200. For example, the wireless base station 200 of company A can be set to be changeable, the wireless base station 200 of company B can be changed, and so on. Further, whether or not the scheduling algorithm can be changed may be set for each target to which the wireless base station 200 provides the wireless communication service. In addition, whether or not the scheduling algorithm can be changed may be arbitrarily set.

In the low frequency band where many cell-edge user terminals 20 (user terminals 20 with low wireless quality) are held, the cell-edge user terminal 20 may fall into a low throughput even though no congestion has occurred. This point becomes more remarkable especially when a scheduling algorithm that does not give priority to the cell edge user terminal 20 is adopted. The control device 100 according to the present embodiment performs change control in which the allocation scheduling of the user terminal 20 at the cell edge is prioritized for the cell and the time zone in which the low-throughput session is occurring. However, if congestion is occurring even if a low-throughput session is occurring, change control may be prohibited because a large amount of traffic cannot be handled. As a result, it is possible to reduce the low-throughput session rate for cells and time zones in which low-throughput sessions occur despite the non-congested state.

In FIG. 1, a case where one control device 100 is arranged for a plurality of base station operation systems 300 has been described mainly as an example, but the present invention is not limited to this. The control device 100 may be arranged for each of the plurality of base station operation systems 300. In this case, the control device 100 acquires the statistical data 202 received from the plurality of radio base stations 200 by the base station operation system 300 from the base station operation system 300. In this case, the control device 100 and the base station operation system 300 may be integrated. That is, the base station operation system 300 may function as the control device 100.

FIG. 2 schematically shows an example of the processing flow by the control device 100. Here, a state in which the statistical data 202 is transmitted while the plurality of radio base stations 200 are scheduling using the first scheduling algorithm will be described as a start state. The control device 100 may execute the process shown in FIG. 2 for each ROP.

In the step (the step may be abbreviated as S) 102, the control device 100 acquires the statistical data 202 of the plurality of radio base stations 200 from the base station statistical information DB 400. In S104, the control device 100 determines whether or not there is a radio base station 200 that satisfies the non-congestion condition and the low throughput condition. If it is determined that it exists, the process proceeds to S106, and if it is determined that it does not exist, the process ends.

In S106, the control device 100 acquires the base station information of the radio base station 200 that satisfies the non-congestion condition and the low throughput condition from the base station setting information DB 500. In S108, the control device 100 identifies a target base station whose scheduling algorithm can be changed from a plurality of radio base stations 200 that satisfy non-congestion conditions and low throughput conditions.

In S110, the control device 100 changes the setting of the scheduling algorithm of the target base station specified in S108. The control device 100 may switch the scheduling algorithm from the first scheduling algorithm to the second scheduling algorithm. The control device 100 transmits, for example, a switching instruction to the base station operation system 300. The base station operation system 300 causes the radio base station 200 to switch the scheduling algorithm according to the switching instruction received from the control device 100.

By executing the process shown in FIG. 2, the control device 100 follows the second scheduling algorithm that prioritizes the edge user terminal over the first scheduling algorithm for the radio base station 200 that satisfies the non-congestion condition and the low throughput condition. Scheduling can be performed, the throughput of the edge user terminal can be improved as compared with the case where the first scheduling algorithm is continued to be used, and the wireless communication provided to the user terminal 20 by the wireless base station 200 can be performed. The overall communication quality of the service can be improved.

FIG. 3 schematically shows an example of the processing flow by the control device 100. The process shown in FIG. 3 is executed after the control device 100 executes the process shown in FIG. 2 after the setting of the scheduling algorithm of some of the radio base stations 200 is changed. The control device 100 may execute the process shown in FIG. 2 for each ROP.

In S202, the control device 100 acquires the statistical data 202 of the radio base station 200 whose settings have been changed from the base station statistical information DB 400. In S204, the control device 100 determines whether or not there is a radio base station 200 that satisfies at least one of a congestion condition and a non-low throughput condition. If it is determined that it exists, the process proceeds to S206, and if it is determined that it does not exist, the process ends.

The congestion condition may be any condition that can determine that the radio base station 200 is congested. For example, the congestion condition is a condition that is satisfied when the number of schedules per TTI is higher than a predetermined threshold value. Satisfying the congestion condition may mean not satisfying the non-congestion condition. The non-low throughput condition may be any condition that can determine that the throughput of the wireless communication service provided to the user terminal 20 by the wireless base station 200 is not low. For example, the non-low throughput condition is a condition that is satisfied when the session rate in which the communication traffic is lower than the predetermined traffic threshold value is higher than the predetermined threshold value. Satisfying the non-low throughput condition may mean not satisfying the low throughput condition.

In S206, the control device 100 cancels the setting of the scheduling algorithm of the radio base station 200 that satisfies at least one of the congestion condition and the non-low throughput condition. That is, the control device 100 switches the scheduling algorithm of the radio base station 200 that satisfies at least one of the congestion condition and the non-low throughput condition from the second scheduling algorithm to the first scheduling algorithm. Then, the process is terminated.

As described above, when the scheduling algorithm is switched from the first scheduling algorithm to the second scheduling algorithm in a state where the radio base station 200 is not congested and the throughput is low, the whole cell is integrated. Communication quality is improved. However, if the cell edge priority scheduling is changed while the radio base station 200 is congested, the allocation of the user terminal 20 of the cell center may be postponed and the congested state may become worse. On the other hand, when the radio base station 200 shifts to the congested state, the deterioration of the congested state can be reduced by returning from the second scheduling algorithm to the first scheduling algorithm.

By executing the process shown in FIG. 3 in addition to the process shown in FIG. 2, the control device 100 according to the present embodiment wirelessly performs only while the radio base station 200 satisfies the non-congestion condition and the low through condition. The base station 200 can be made to use the second scheduling algorithm. As a result, it is possible to suppress the low throughput of the edge user terminal by giving priority to the edge user terminal during non-congestion and low throughput while improving the quality of the entire cell by not giving priority to the edge user terminal during congestion. ..

FIG. 4 schematically shows an example of the functional configuration of the control device 100. The control device 100 includes a data acquisition unit 102, a data storage unit 104, a determination unit 106, and a control unit 108.

The data acquisition unit 102 acquires communication status data regarding the status of wireless communication by the wireless base station 200, which is transmitted by the wireless base station 200 at predetermined intervals. The data acquisition unit 102 may acquire statistical data 202 from the base station statistical information DB 400. The data acquisition unit 102 may acquire the statistical data 202 from the base station statistical information DB 400 each time the base station statistical information DB 400 receives the statistical data 202 from the plurality of radio base stations 200. The data acquisition unit 102 may acquire only the communication status data included in the statistical data 202 from the base station statistical information DB 400.

The data storage unit 104 may store the statistical data 202 acquired by the data acquisition unit 102. The data storage unit 104 may store the communication status data acquired by the data acquisition unit 102.

The determination unit 106 determines whether or not the non-congestion condition and the low throughput condition are satisfied by the radio base station 200 that is scheduling according to the first scheduling algorithm. The determination unit 106 may determine whether or not the non-congestion condition and the low throughput condition are satisfied based on the past communication status data of the radio base station 200. The determination unit 106, for example, indicates that the communication status data of the radio base station 200 at the past second date and time corresponding to the first date and time indicates that the radio base station 200 is not congested, and is predetermined. When it indicates that the session rate in which the communication traffic is lower than the traffic threshold value is lower than the predetermined threshold value, it is determined that the non-congestion condition and the low throughput condition are satisfied at the first date and time. For example, the determination unit 106 may specify a time zone in which the non-congestion condition and the low throughput condition are satisfied on the same day of the previous week of the day, based on the communication status data stored in the data storage unit 104. ..

The control unit 108 controls the radio base station 200 to perform scheduling according to the second scheduling algorithm when the determination unit 106 determines that the non-congestion condition and the low throughput condition are satisfied. When the determination unit 106 identifies the time zone in which the non-congestion condition and the low throughput condition are satisfied on the same day of the previous week of the day, the control unit 108 determines during the specified time zone of the day. , The radio base station 200 may be controlled to perform scheduling according to the second scheduling algorithm.

For example, the control unit 108 transmits an instruction for scheduling according to the second scheduling algorithm to the radio base station 200 via the base station operation system 300. Further, the control unit 108 transmits, for example, a switching instruction for switching the scheduling algorithm from the first scheduling algorithm to the second scheduling algorithm to the radio base station 200 via the base station operation system 300.

When the determination unit 106 identifies a time zone in which the non-congestion condition and the low throughput condition are satisfied on the same day of the previous week, the control unit 108 informs the radio base station 200 during the time zone. Scheduling may be performed according to the second scheduling algorithm, and the scheduling algorithm used by the radio base station 200 may be switched from the second scheduling algorithm to the first scheduling algorithm at the timing when the time zone elapses. As described above, the control in which the determination unit 106 and the control unit 108 switch the scheduling algorithm of the radio base station 200 based on the past communication status data stored in the data storage unit 104 is referred to as planned control. May be stated.

In the determination unit 106, for example, the communication status data of the radio base station 200 that is scheduled according to the first scheduling algorithm acquired by the data acquisition unit 102 for each TOP is continuously congested by the radio base station 200. It may be determined that the condition is satisfied when it indicates that the wireless communication service is not provided and the throughput of the wireless communication service provided to the user terminal 20 by the wireless base station 200 is low. The determination unit 106 provides, for example, that the communication status data of the radio base station 200 is not congested once or a plurality of times in succession, and that the radio base station 200 provides the user terminal 20 with information. When it indicates that the throughput of the wireless communication service to be performed is low, it is determined that the condition is satisfied. In addition, the determination unit 106 tells the user terminal 20 that the communication status data of the radio base station 200 scheduled according to the first scheduling algorithm is not congested by the radio base station 200 and that the radio base station 200 informs the user terminal 20. On the other hand, if it indicates that the throughput of the wireless communication service provided is low, it may be determined that the condition is satisfied immediately.

The determination unit 106 may determine whether or not the radio base station 200, which is scheduling according to the second scheduling algorithm, has shifted from the non-congested state to the congested state. In the determination unit 106, for example, the communication status data of the radio base station 200 that is scheduled according to the second scheduling algorithm, which is acquired by the data acquisition unit 102 every predetermined period, is continuously transmitted to the radio base. When it indicates that the station is congested, it is determined that the radio base station 200 has transitioned from the non-congested state to the congested state.

The control unit 108 may switch the scheduling algorithm used by the radio base station 200 from the second scheduling algorithm to the first scheduling algorithm when the determination unit 106 determines that the state has changed to the congested state. For example, the control unit 108 transmits an instruction for scheduling according to the first scheduling algorithm to the radio base station 200 via the base station operation system 300. Further, the control unit 108 transmits, for example, a switching instruction for switching the scheduling algorithm from the second scheduling algorithm to the first scheduling algorithm to the radio base station 200 via the base station operation system 300.

The determination unit 106 may determine whether or not the radio base station 200, which is scheduling according to the second scheduling algorithm, has transitioned from the low throughput state to the non-low throughput state. In the determination unit 106, for example, the communication status data of the radio base station 200 that is scheduled according to the second scheduling algorithm acquired by the data acquisition unit 102 every predetermined period is continuously predetermined. When it indicates that the session rate in which the communication traffic is lower than the traffic threshold is lower than the predetermined threshold, it is determined that the radio base station 200 has transitioned from the low throughput state to the non-low throughput state.

The control unit 108 may switch the scheduling algorithm used by the radio base station 200 from the second scheduling algorithm to the first scheduling algorithm when it is determined by the determination unit 106 that the state has shifted to the non-low throughput state. For example, the control unit 108 transmits an instruction for scheduling according to the first scheduling algorithm to the radio base station 200 via the base station operation system 300. Further, the control unit 108 transmits, for example, a switching instruction for switching the scheduling algorithm from the second scheduling algorithm to the first scheduling algorithm to the radio base station 200 via the base station operation system 300.

As described above, the communication status data acquired by the determination unit 106 and the control unit 108 every predetermined period by the data acquisition unit 102 continuously satisfies the non-congestion condition and the low throughput condition, or is not. By switching the scheduling algorithm according to the transition from the congested state to the congested state or the transition from the low throughput state to the non-low throughput state, the scheduling algorithm is appropriately switched according to the change in the situation. be able to. Such control may be referred to as sudden control.

In sudden control, a time lag occurs before it is determined that a non-congestion condition and a low throughput condition are satisfied, whereas in planned control, the scheduling algorithm is switched without such a time lag. Can be done. According to the plan control, when the communication environment changes due to the installation of a new wireless base station 200 or the change of the setting of the wireless base station 200, until the scheduling algorithm is switched according to the change. It may take some time, but according to the sudden control, it is possible to quickly respond to such a change.

FIG. 5 is an explanatory diagram for explaining the control time when the control device 100 performs planned control. Here, the case where the control device 100 controls the scheduling algorithm for each of the plurality of days with the non-congested and low throughput time of the same day of the previous week as the control time is illustrated. Although the case where Saturday and Sunday are excluded from the control target is illustrated here, the control device 100 may add Saturday and Sunday to the control target.

For example, the control device 100 adopts the non-congested and low-throughput time on March 5, 2019 (Tuesday) on the same day of the previous week as the control time on March 12, 2019 (Tuesday). In the example shown in FIG. 5, it is determined that on March 5 (Tuesday), the throughput was non-congested and the throughput was low from 8:00 to 9:00. The control unit 108 switches the scheduling algorithm from the first scheduling algorithm to the second scheduling algorithm at 8:00 on March 12 (Monday), and changes the scheduling algorithm from the second scheduling algorithm to the second scheduling algorithm at 9:00. The radio base station 200 is controlled so as to switch to the scheduling algorithm of 1.

When the same day of the previous week is a holiday, the control device 100 may refer to a day that is the same day before the week before the previous week and is not a holiday. For example, when the same day of the previous week is a holiday, the control device 100 refers to the same day of the week before the previous week that is not a holiday. In the example shown in FIG. 5, since the same day of the previous week is a holiday as the control time on Thursday, March 28, the control device 100 refers to Thursday, March 14, the same day of the previous week. .. On Thursday, March 14, it was determined that there was no congestion and low throughput between 8:00 and 9:15. The control unit 108 switches the scheduling algorithm from the first scheduling algorithm to the second scheduling algorithm at 8:00 on Thursday, March 28, and changes the scheduling algorithm from the second scheduling algorithm to the second scheduling algorithm at 9:15. The radio base station 200 is controlled so as to switch to the scheduling algorithm of 1.

FIG. 6 schematically shows an example of a hardware configuration of a computer 1200 that functions as a control device 100. A program installed on the computer 1200 causes the computer 1200 to function as one or more "parts" of the apparatus according to the present embodiment, or causes the computer 1200 to perform an operation associated with the apparatus according to the present embodiment or the one or the like. A plurality of "parts" can be executed and / or a computer 1200 can be made to execute a process according to the present embodiment or a stage of the process. Such a program may be run by the CPU 1212 to cause the computer 1200 to perform certain operations associated with some or all of the blocks of the flowcharts and block diagrams described herein.

The computer 1200 according to this embodiment includes a CPU 1212, a RAM 1214, and a graphic controller 1216, which are interconnected by a host controller 1210. The computer 1200 also includes input / output units such as a communication interface 1222, a storage device 1224, a DVD drive 1226, and an IC card drive, which are connected to the host controller 1210 via an input / output controller 1220. The DVD drive 1226 may be a DVD-ROM drive, a DVD-RAM drive, or the like. The storage device 1224 may be a hard disk drive, a solid state drive, or the like. The computer 1200 also includes a legacy input / output unit such as a ROM 1230 and a keyboard, which are connected to the input / output controller 1220 via an input / output chip 1240.

The CPU 1212 operates according to a program stored in the ROM 1230 and the RAM 1214, thereby controlling each unit. The graphic controller 1216 acquires the image data generated by the CPU 1212 in a frame buffer or the like provided in the RAM 1214 or itself so that the image data is displayed on the display device 1218.

The communication interface 1222 communicates with other electronic devices via the network. The storage device 1224 stores programs and data used by the CPU 1212 in the computer 1200. The DVD drive 1226 reads the program or data from the DVD-ROM 1227 or the like and provides it to the storage device 1224. The IC card drive reads the program and data from the IC card and / or writes the program and data to the IC card.

The ROM 1230 stores in it a boot program or the like executed by the computer 1200 at the time of activation, and / or a program depending on the hardware of the computer 1200. The input / output chip 1240 may also connect various input / output units to the input / output controller 1220 via a USB port, a parallel port, a serial port, a keyboard port, a mouse port, and the like.

The program is provided by a computer-readable storage medium such as a DVD-ROM 1227 or an IC card. The program is read from a computer-readable storage medium, installed in a storage device 1224, RAM 1214, or ROM 1230, which is also an example of a computer-readable storage medium, and executed by the CPU 1212. The information processing described in these programs is read by the computer 1200 and provides a link between the program and the various types of hardware resources described above. The device or method may be configured to implement the operation or processing of information in accordance with the use of the computer 1200.

For example, when communication is executed between the computer 1200 and an external device, the CPU 1212 executes a communication program loaded in the RAM 1214, and performs communication processing with respect to the communication interface 1222 based on the processing described in the communication program. You may order. Under the control of the CPU 1212, the communication interface 1222 reads and reads transmission data stored in a transmission buffer area provided in a recording medium such as a RAM 1214, a storage device 1224, a DVD-ROM 1227, or an IC card. The data is transmitted to the network, or the received data received from the network is written to the reception buffer area or the like provided on the recording medium.

Further, the CPU 1212 makes it possible for the RAM 1214 to read all or necessary parts of a file or database stored in an external recording medium such as a storage device 1224, a DVD drive 1226 (DVD-ROM1227), an IC card, etc., on the RAM 1214. Various types of processing may be performed on the data of. The CPU 1212 may then write back the processed data to an external recording medium.

Various types of information such as various types of programs, data, tables, and databases may be stored in recording media and processed. The CPU 1212 describes various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, and information retrieval described in various parts of the present disclosure with respect to the data read from the RAM 1214. Various types of processing may be performed, including / replacement, etc., and the results are written back to the RAM 1214. Further, the CPU 1212 may search for information in a file, database, or the like in the recording medium. For example, when a plurality of entries each having an attribute value of the first attribute associated with the attribute value of the second attribute are stored in the recording medium, the CPU 1212 is the first of the plurality of entries. The attribute value of the attribute of is searched for the entry that matches the specified condition, the attribute value of the second attribute stored in the entry is read, and the attribute value of the second attribute is changed to the first attribute that satisfies the predetermined condition. You may get the attribute value of the associated second attribute.

The program or software module described above may be stored on a computer 1200 or in a computer-readable storage medium near the computer 1200. Further, a recording medium such as a hard disk or RAM provided in a dedicated communication network or a server system connected to the Internet can be used as a computer-readable storage medium, whereby the program can be transferred to the computer 1200 via the network. offer.

The blocks in the flowcharts and block diagrams of this embodiment may represent the stage of the process in which the operation is performed or the "part" of the device responsible for performing the operation. Specific steps and "parts" are supplied with a dedicated circuit, a programmable circuit supplied with computer-readable instructions stored on a computer-readable storage medium, and / or with computer-readable instructions stored on a computer-readable storage medium. It may be implemented by the processor. Dedicated circuits may include digital and / or analog hardware circuits, and may include integrated circuits (ICs) and / or discrete circuits. Programmable circuits include logical products, logical sums, exclusive logical sums, negative logical products, negative logical sums, and other logical operations, such as, for example, field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), and the like. , Flip-flops, registers, and reconfigurable hardware circuits, including memory elements.

The computer readable storage medium may include any tangible device capable of storing instructions executed by the appropriate device, so that the computer readable storage medium having the instructions stored therein may be in a flow chart or block diagram. It will be equipped with a product that contains instructions that can be executed to create means for performing the specified operation. Examples of the computer-readable storage medium may include an electronic storage medium, a magnetic storage medium, an optical storage medium, an electromagnetic storage medium, a semiconductor storage medium, and the like. More specific examples of computer-readable storage media include floppy (registered trademark) disks, diskettes, hard disks, random access memory (RAM), read-only memory (ROM), and erasable programmable read-only memory (EPROM or flash memory). , Electrically Erasable Programmable Read Only Memory (EEPROM), Static Random Access Memory (SRAM), Compact Disc Read Only Memory (CD-ROM), Digital Versatile Disc (DVD), Blu-ray® Disc, Memory Stick , Integrated circuit cards and the like may be included.

Computer-readable instructions are assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state-setting data, or object-oriented programming such as Smalltalk, JAVA®, C ++, etc. Includes either source code or object code written in any combination of one or more programming languages, including languages and traditional procedural programming languages such as the "C" programming language or similar programming languages. good.

Computer-readable instructions are used to generate means for a general-purpose computer, a special-purpose computer, or the processor of another programmable data processing device, or a programmable circuit, to perform an operation specified in a flowchart or block diagram. General purpose computers, special purpose computers, or other programmable data processing locally or via a local area network (LAN), a wide area network (WAN) such as the Internet, etc., to execute such computer-readable instructions. It may be provided to the processor of the device or a programmable circuit. Examples of processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers, and the like.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that the form with such changes or improvements may be included in the technical scope of the present invention.

The order of execution of each process such as operation, procedure, step, and step in the apparatus, system, program, and method shown in the claims, specification, and drawings is particularly "before" and "prior to". It should be noted that it can be realized in any order unless the output of the previous process is used in the subsequent process. Even if the scope of claims, the specification, and the operation flow in the drawings are explained using "first", "next", etc. for convenience, it means that it is essential to carry out in this order. It's not a thing.

10 communication system, 20 user terminal, 100 control device, 102 data acquisition unit, 104 data storage unit, 106 judgment unit, 108 control unit, 200 radio base station, 202 statistical data, 300 base station operation system, 400 base station statistical information DB, 500 base station setting information DB, 1200 computer, 1210 host controller, 1212 CPU, 1214 RAM, 1216 graphic controller, 1218 display device, 1220 input / output controller, 1222 communication interface, 1224 storage device, 1226 DVD drive, 1227 DVD- ROM, 1230 ROM, 1240 I / O chip

Claims (17)

A non-congestion condition indicating that the radio base station scheduling according to the first scheduling algorithm is not congested, and a low throughput of the wireless communication service provided to the user terminal by the radio base station. A determination unit that determines whether or not the low throughput condition is satisfied, and
When the determination unit determines that the non-congestion condition and the low throughput condition are satisfied, the radio base station is in accordance with a second scheduling algorithm that prioritizes an edge user terminal over the first scheduling algorithm. A control device that includes a control unit that controls scheduling. The control device according to claim 1, wherein the second scheduling algorithm is a scheduling algorithm that gives priority to a user terminal having a lower radio quality than the first scheduling algorithm. The control device according to claim 1 or 2, wherein the second scheduling algorithm is a scheduling algorithm having a higher ratio of allocating resources to user terminals at the edge than the first scheduling algorithm. The control device according to any one of claims 1 to 3, wherein the first scheduling algorithm is Proportional Fair Low. The control device according to claim 4, wherein the second scheduling algorithm is Proportional Fair High. The control device according to claim 4, wherein the second scheduling algorithm is a Proportional Fire Medium. A data acquisition unit that acquires communication status data related to the status of wireless communication by the wireless base station, which is transmitted by the wireless base station at predetermined intervals, and a data acquisition unit.
It is equipped with a data storage unit that stores the communication status data.
The determination unit determines whether or not the non-congestion condition and the low throughput condition are satisfied based on the past communication status data of the radio base station, according to any one of claims 1 to 6. The control device described. The determination unit indicates that the communication status data of the radio base station in the past second date and time corresponding to the first date and time indicates that the radio base station is not congested, and has a predetermined traffic threshold value. The seventh aspect of claim 7, wherein it is determined that the non-congestion condition and the low throughput condition are satisfied at the first date and time when the communication traffic is lower than the session rate indicating that the session rate is lower than the predetermined threshold value. Control device. The communication status data indicates that the radio base station is not congested when the number of scheduling requests per 1 TTI (Transmission Time Interval) derived based on the communication status data is less than a predetermined threshold value. The control device according to claim 8, as shown. Based on the communication status data stored in the data storage unit, the determination unit identifies a time zone in which the non-congestion condition and the low throughput condition were satisfied on the same day of the week before the day.
The control unit according to any one of claims 7 to 9, wherein the control unit controls the radio base station to perform scheduling according to the second scheduling algorithm during the time zone of the day. Control device. The control device according to claim 10, wherein the control unit switches the schedule algorithm used by the radio base station from the second scheduling algorithm to the first scheduling algorithm at the timing when the time zone elapses. It is equipped with a data acquisition unit that acquires communication status data related to the status of wireless communication by the wireless base station, which is transmitted by the wireless base station at predetermined intervals.
The determination unit continuously indicates that the radio base station is not congested by the communication status data acquired by the data acquisition unit at each predetermined period, and continuously. Claims 1 to 6, wherein it is determined that the non-congestion condition and the low throughput condition are satisfied when the session rate in which the communication traffic is lower than the predetermined traffic threshold value indicates that the session rate is lower than the predetermined threshold value. The control device according to any one. The determination unit determines whether or not the radio base station scheduling according to the second scheduling algorithm has transitioned from a non-congested state to a congested state.
12. The 12th aspect of the present invention, wherein the control unit switches the schedule algorithm used by the radio base station determined to be in a congested state by the determination unit from the second scheduling algorithm to the first scheduling algorithm. Control device. The determination unit determines whether or not the radio base station scheduling according to the second scheduling algorithm has transitioned from a low throughput state to a non-low throughput state.
12. The control unit switches the schedule algorithm used by the radio base station determined by the determination unit to the non-low throughput state from the second scheduling algorithm to the first scheduling algorithm. Or the control device according to 13. The control device according to any one of claims 1 to 14,
A communication system including the radio base station. A program for operating a computer as the control device according to any one of claims 1 to 14. A control method performed by a computer
A non-congestion condition indicating that the radio base station scheduling according to the first scheduling algorithm is not congested, and a low throughput of the wireless communication service provided to the user terminal by the radio base station. Judgment stage to determine whether the low throughput condition is satisfied, and
A second scheduling algorithm that prioritizes the edge user terminal over the first scheduling algorithm for the radio base station when it is determined in the determination step that the non-congestion condition and the low throughput condition are satisfied. A control method with a control stage that controls the scheduling.

Images