JP6949748B2 - Communication band control device, communication band control method, and communication band control program - Google Patents

Description

The present invention relates to a device, a method, and a program for controlling a communication band.

Conventionally, a communication band control function is known as one of the QoS (Quality of Service) functions provided in a network device such as a router. The communication band control function is a function that can guarantee or limit the communication band for a specific communication. When using this function, the network administrator needs to set the communication band for a specific communication in advance according to the user's network usage scene. Further, even after that, when the user's network usage scene changes, the network administrator needs to change the communication band setting each time. Here, when the user's network usage scene changes, for example, (1) the communication source or communication destination of communication changes, (2) the communication volume of communication changes, or (3) the priority of communication changes. It means that the communication quality (retransmission frequency, error frequency, etc.) changes.

The following techniques are known for setting or changing the communication band when controlling the communication band. In a mobile communication system that relays packet communication between a mobile device and a macrocell base station, a technique for increasing or decreasing the session guarantee band as the number of calls from the mobile device increases or decreases is known (for example, Patent Document 1). reference). Further, in a wireless communication device that simultaneously performs real-time communication and non-real-time communication with a wireless access point, data received between wireless links with the wireless access point is received while real-time communication is being performed. A technique is known in which the retransmission frequency, which is the ratio of the retransmission data to the total number, is calculated, and the communication band for non-real-time communication is set based on the calculation result (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2016-181763 Japanese Unexamined Patent Publication No. 2009-0442773

In the above-mentioned communication band control function, every time the user's network usage scene changes, the network administrator has to change the communication band setting, which is troublesome. Further, when the change in the user's network usage scene is due to a plurality of items in the above (1) to (4) and the like, it is easy for the network administrator to appropriately change the communication band setting. It wasn't.

In view of the above circumstances, the present invention provides a communication band control device, a communication band control method, and a communication band control program that can automatically and appropriately change the communication band setting when the user's network usage scene changes. The purpose is to do.

One aspect of the device is a communication band control device that controls the communication band, and stores a communication band specification table that defines the communication band for each communication source segment combination, which is a combination of the communication source segment and the communication destination segment. a communication band defining table storage unit, at predetermined intervals, for communication via the communication bandwidth control apparatus per the predetermined time period, the communication source destination combination is a combination of communication source and the communication destination, the communication source destination combination the total communication amount for each, the maximum value of the communication priority of the communication source destination for each combination, and the communication status acquisition section that acquires and any one or more of the retransmission rate of the communication source destination for each combination and, the communication status acquisition obtained by section, wherein the communication source destination combinations, a total traffic of the communication source destination for each combination, the maximum value of the communication priority of the communication source destination for each combination, and any retransmission rate of said communication source destination for each combination one or more and the communication status storage unit for storing, stored in the communication status storage unit, wherein the communication source destination combinations, a total traffic of the communication source destination for each combination, the communication of the communication source destination for each combination the maximum value of the priority, and on the basis of the communication source destination for each combination of the retransmission rate any one or more of an analysis unit for analyzing the communication conditions of the communication source destination segment for each combination, the analysis result of the analysis unit According to the communication band specification table change unit that changes the communication band specification table stored in the communication band specification table storage unit and the communication band specification table stored in the communication band specification table storage unit. It is characterized by including a communication band control unit that controls the band of communication via the communication band control device.

One aspect of the method is executed in a communication band control device including a communication band specification table storage unit that stores a communication band specification table that specifies a communication band for each communication source segment combination, which is a combination of a communication source segment and a communication destination segment. a communication bandwidth control method, every predetermined time period, the the communication via the communication bandwidth control apparatus per predetermined period, and a communication source destination combination is a combination of communication source and the communication destination, the communication source the total communication amount for each previous combination, and stores the maximum value of the communication priority of the communication source destination for each combination, and to the communication status storing unit acquires the any one or more of the retransmission rate of said communication source destination for each combination , The total communication amount for each communication source combination and the communication source combination stored in the communication status storage unit, the maximum value of the communication priority for each communication source combination, and each communication source combination. the retransmission rate on the basis of the any one or more analyzes the communication status of the communication source destination segment for each combination, based on a result of the analysis, the communication band defining the communication bandwidth stored in the table storage unit It is characterized in that the specified table is changed and the band of communication via the communication band control device is controlled according to the communication band specified table stored in the communication band specified table storage unit.

One aspect of the program is a computer of a communication band control device including a communication band specification table storage unit that stores a communication band specification table that defines a communication band for each communication source segment combination, which is a combination of a communication source segment and a communication destination segment. in every predetermined period, the on communication via the communication bandwidth control apparatus per predetermined time period, the communication source and the communication destination combinations and communication source destination combination is the total traffic of the communication source destination for each combination, storing said maximum value of the communication priority of the communication source destination for each combination, and the any one or more of the retransmission rate of the communication source destination for each combination and obtained by the stored in the communication status storage unit, to the communication status storage unit is, the communication source destination combinations, a total traffic of the communication source destination for each combination, the maximum value of the communication priority of the communication source destination for each combination, and any one of the retransmission rate of said communication source destination for each combination based on the above analyzes the communication status of the communication source destination segment for each combination, based on a result of the analysis, and changes the communication band defined table stored in the communication band defining table storage unit, the communication Bandwidth control of communication via the communication band control device is performed according to the communication band specification table stored in the band specification table storage unit.
It is a communication band control program characterized by executing the process.

The disclosed devices, methods, and programs have the effect of being able to automatically and appropriately change the communication band setting when the user's network usage scene changes.

It is a figure which illustrates the communication system including the router which is the communication band control device which concerns on one Embodiment. It is a figure which illustrates the structure of the packet (IP packet) which passes through the router which is the communication band control device which concerns on one Embodiment. It is a figure which illustrates the main functional block which concerns on the communication band control of the router which is the communication band control device which concerns on one Embodiment. It is a figure which illustrates the communication band specification table stored in the communication band specification table storage part. It is a figure which illustrates the communication source combination stored in the communication source combination storage part. It is a figure which illustrates the total traffic volume stored in the traffic volume storage part. It is a figure which illustrates the maximum value of the communication priority stored in the priority storage part. It is a figure which illustrates the retransmission rate stored in the retransmission rate storage part. It is a figure which illustrates the 1st weighting table stored in the 1st weighting table storage part. It is a figure which illustrates the 2nd weighting table stored in the 2nd weighting table storage part. It is a figure which illustrates the 3rd weighting table stored in the 3rd weighting table storage part. It is a figure which illustrates the 4th weighting table stored in the 4th weighting table storage part. It is a figure which illustrates the increase / decrease value regulation table stored in the increase / decrease value regulation table storage part. It is a flowchart which illustrates the communication band regulation table change processing executed in the router which is the communication band control device which concerns on one Embodiment. It is a figure which illustrates the hardware configuration of the router which is the communication band control device which concerns on one Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a communication system including a router which is a communication band control device according to an embodiment.

As illustrated in FIG. 1, communication system 1 includes a plurality of network segments (hereinafter simply referred to as “segments”) 10 (for example, segments A, B, C, D, E, F, G) and a router 20. A plurality of segments 10 are connected to the router 20.

The segment 10 includes a plurality of servers 11 and a plurality of PCs (Personal Computers) 12, and they are connected to a LAN (Local Area Network) 13.

The router 20 is a device that relays communication between segments 10. In addition, the router 20 has a QoS function and also controls the bandwidth of communication between the segments 10.

Generally, a plurality of routers 20 are required in the communication system 1, and they are connected by a WAN (Wide Area Network) between them, but they are omitted here.

FIG. 2 is a diagram illustrating a structure of a packet (IP packet) passing through a router which is a communication band control device according to an embodiment.

As illustrated in FIG. 2, the packet has a version, a header length, a service type, a datagram length, an ID, a flag, a fragment offset, a TTL, a protocol number, a header check sum, a source IP address, a destination IP address, and an option part. , And each field of the data part. Since these details are known, description thereof will be omitted.

FIG. 3 is a diagram illustrating a main functional block related to communication band control of a router which is a communication band control device according to an embodiment.

As illustrated in FIG. 3, the router 20 includes a communication band regulation table storage unit 201, a communication status acquisition unit 202, a communication status storage unit 203, an analysis unit 204, a communication band regulation table change unit 205, and a communication band control unit 206. including.

The communication band specification table storage unit 201 stores a communication band specification table that defines the communication band for each combination of the communication source segment and the communication destination segment, which is a combination of the communication source segment and the communication destination segment.

Communication status acquisition unit 202 at predetermined time intervals, for communication via the router 20 per the predetermined time period (communication router 20 relays), a communication source destination combination is a combination of communication source and the communication destination, communication the total amount of communication Motosaki each combination, the maximum value of the communication priority of the communication source destination for each combination, and obtains the any one or more of the retransmission rate of the communication source destination for each combination.

The communication status storage unit 203 includes the communication source combination, the total communication amount for each communication source combination, the maximum value of the communication priority for each communication source combination, and the communication source destination acquired by the communication status acquisition unit 202. each combination of retransmission rate any one or more of the stores.

Analysis unit 204, stored in the communication status storage unit 203, a communication source destination combinations, a total traffic of the communication source destination for each combination, the maximum value of the communication priority of the communication source destination for each combination, and communication source destination for each combination based on the any one or more of the retransmission rate, analyzing the communication conditions of the communication source destination segment for each combination.

The communication band specification table change unit 205 changes the communication band specification table stored in the communication band specification table storage unit 201 based on the analysis result of the analysis unit 204.

The communication band control unit 206 controls the band of communication via the router 20 according to the communication band regulation table stored in the communication band regulation table storage unit 201.

The communication status acquisition unit 202 includes, for example, a communication source destination combination acquisition unit 207, a communication amount measurement unit 208, a priority acquisition unit 209, and a retransmission rate acquisition unit 210.

The communication source combination acquisition unit 207 acquires the communication source combination of the communication via the router 20 for each predetermined period. For example, the communication source combination acquisition unit 207 acquires a combination of a source IP address and a destination IP address (see FIG. 2) of a packet passing through the router 20 as a communication source combination.

The communication amount measuring unit 208 measures the total communication amount for each communication source combination of the communication via the router 20 for each predetermined period. For example, the communication amount measuring unit 208 measures the total communication amount for each communication source combination by measuring the total datagram length (see FIG. 2) of the packet passing through the router 20 for each communication source combination. do.

The priority acquisition unit 209 acquires the maximum value of the communication priority for each communication source combination of the communication via the router 20 for each predetermined period. For example, the priority acquisition unit 209 acquires the maximum value of the CoS (Class of Service) value stored in the service type (see FIG. 2) of the packet passing through the router 20 for each communication source combination. Acquires the maximum value of communication priority for each communication source combination.

The retransmission rate acquisition unit 210 acquires the retransmission rate for each combination of communication source destinations for communication via the router 20 for each predetermined period. For example, the retransmission rate acquisition unit 210 calculates the retransmission rate for each communication source combination by calculating the ratio of the number of retransmission packets that pass through the router 20 to the number of packets that pass through the router 20 for each communication source combination. get. The number of retransmission packets can be totaled based on the sequence number and the acknowledgment number (ACK number) included in the packet data section (see FIG. 2). For example, if the sequence number and the acknowledgment number match in n packets, n-1 of the n packets is a retransmission packet.

The communication status storage unit 203 includes, for example, a communication source destination combination storage unit 211, a communication volume storage unit 212, a priority storage unit 213, and a retransmission rate storage unit 214.

The communication source combination storage unit 211 stores the communication source combination acquired by the communication source combination acquisition unit 207.

The communication volume storage unit 212 stores the total communication volume measured by the communication volume measurement unit 208.
The priority storage unit 213 stores the maximum value of the communication priority acquired by the priority acquisition unit 209.

The retransmission rate storage unit 214 stores the retransmission rate acquired by the retransmission rate acquisition unit 210.
The analysis unit 204 has, for example, the communication source combination stored in the communication source combination storage unit 211, the total communication amount stored in the communication amount storage unit 212, and the communication priority stored in the priority storage unit 213. Based on the maximum value of and the retransmission rate stored in the retransmission rate storage unit 214, the communication status for each combination of communication source destination segments is analyzed.

The analysis unit 204 includes, for example, a first difference detection unit 215, a second difference detection unit 216, a third difference detection unit 217, a fourth difference detection unit 218, and an increase / decrease value determination unit 219.

The first difference detection unit 215 is the difference between the communication source combination stored in the communication source combination storage unit 211 for each predetermined period and the communication source combination for each communication source segment combination with respect to the previous predetermined period. Is detected.

The second difference detection unit 216 calculates the total communication amount for each communication source segment combination for the predetermined period from the total communication amount stored in the communication amount storage unit 212 for each predetermined period, and determines the previous predetermined amount. The difference in the total communication volume for each communication source segment combination with respect to the period is detected.

The third difference detection unit 217 determines the maximum value of the communication priority for each communication source segment combination for the predetermined period from the maximum value of the communication priority stored in the priority storage unit 213 for each predetermined period. It is acquired and the difference in the maximum value of the communication priority for each communication source segment combination with respect to the previous predetermined period is detected.

The fourth difference detection unit 218 aggregates the retransmission rate for each communication source segment combination for the predetermined period based on the retransmission rate stored in the retransmission rate storage unit 214 for each predetermined period, and determines the previous determination. Detects the difference in the retransmission rate aggregation result for each communication source segment combination with respect to the period. The retransmission rate for each communication source segment combination is aggregated, for example, by calculating the ratio of the number of retransmission packets passing through the router 20 to the number of packets passing through the router 20 for each communication source segment combination. be able to.

The increase / decrease value determination unit 219 detects the detection result of the first difference detection unit 215, the detection result of the second difference detection unit 216, the detection result of the third difference detection unit 217, and the detection of the fourth difference detection unit 218. Based on the result, the increase / decrease value of the communication band for each communication source segment combination is determined.

The communication band regulation table change unit 205 changes the communication band regulation table stored in the communication band regulation table storage unit 201, for example, based on the increase / decrease value determined by the increase / decrease value determination unit 219.

The increase / decrease value determination unit 219 is, for example, a first weighted value according to the detection result of the first difference detection unit 215, a second weighted value according to the detection result of the second difference detection unit 216, and a third. A third weighting value according to the detection result of the difference detection unit 217 and a fourth weighting value according to the detection result of the fourth difference detection unit 218 are determined, and the first weighting value and the second weighting value are determined. The increase / decrease value is determined according to the value, the third weighted value, and the fourth weighted value.

Further, the router 20 further includes a first weighted table storage unit 220, a second weighted table storage unit 221, a third weighted table storage unit 222, and a fourth weighted table storage unit 223.

The first weighting table storage unit 220 stores a first weighting table that defines a first weighting value for the detection result of the first difference detection unit 215.

The second weighting table storage unit 221 stores a second weighting table that defines a second weighting value for the detection result of the second difference detection unit 216.

The third weighting table storage unit 222 stores a third weighting table that defines a third weighting value for the detection result of the third difference detection unit 217.

The fourth weighting table storage unit 223 stores a fourth weighting table that defines a fourth weighting value for the detection result of the fourth difference detection unit 218.

The increase / decrease value determination unit 219 determines, for example, the first weighting value according to the first weighting table stored in the first weighting table storage unit 220, and stores the second weighting value in the second weighting table storage unit 221. The second weighting value is determined according to the weighting table of the above, the third weighting value is determined according to the third weighting table stored in the third weighting table storage unit 222, and is stored in the fourth weighting table storage unit 223. The fourth weighting value is determined according to the fourth weighting table.

Further, the router 20 stores an increase / decrease value specification table storage unit 224 that stores an increase / decrease value specification table that defines an increase / decrease value with respect to the first weight value, the second weight value, the third weight value, and the fourth weight value. Further includes.

The increase / decrease value determination unit 219 determines the increase / decrease value according to the increase / decrease value regulation table stored in the increase / decrease value regulation table storage unit 224, for example.

FIG. 4 is a diagram illustrating a communication band specification table stored in the communication band specification table storage unit.

As illustrated in FIG. 4, the communication band regulation table stores the band control rule number, the source, the destination, and the reserved band ratio for each band control rule. Here, the bandwidth control rule number is a number uniquely assigned to the bandwidth control rule. The source is a source segment (communication source segment). The destination is a destination segment (communication destination segment). The reserved band ratio is the ratio of the reserved communication band to the total communication band. The total communication band is the total communication band that can be used by the router 20 for relaying communication.

In the communication bandwidth regulation table illustrated in FIG. 4, for example, the bandwidth control rule having the bandwidth control rule number "1" is secured for communication in which the source segment is "segment A" and the destination segment is "segment D". It shows that the band ratio is specified as "10%". This also means that the secured bandwidth ratio to the communication source segment combination in which the communication source segment is “segment A” and the communication destination segment is “segment D” is defined as “10%”.

In the communication band specification table illustrated in FIG. 4, the segment address may be stored as the source segment and the segment address may be stored as the destination segment. FIG. 4 shows an example of segment addresses for “Segment A”, “Segment D”, “Segment E”, and “Segment F”, but “Segment B”, “Segment C”, and “Segment G”. The description of the segment address for is omitted.

FIG. 5 is a diagram illustrating a communication source combination stored in the communication source combination storage unit.

As illustrated in FIG. 5, the communication source combination storage unit 211 corresponds to the communication source combination for each predetermined period (one month in the example of FIG. 5) acquired by the communication source combination acquisition unit 207. It is stored in association with the bandwidth control rule number to be used.

In FIG. 5, A1 and A2 indicate devices in segment A (for example, server 11 or PC12), D1 and D2 indicate devices in segment D, and E1 indicates devices in segment E. (The same applies to FIGS. 6, 7, and 8 described later).

In the communication source combination storage unit 211 illustrated in FIG. 5, for example, the communication source destination combination “source A1 → destination D1” indicates a combination of the source A1 and the destination D1, and the source A1 is in the segment A. Since the destination D1 is a device in the segment D, the bandwidth control rule number “1” of the bandwidth control rule in which the source segment is the segment A and the destination segment is the segment D is associated with the device.

The communication source combination storage unit 211 illustrated in FIG. 5 may store the combination of the source IP address and the destination IP address as the communication source combination.

FIG. 6 is a diagram illustrating the total communication amount stored in the communication amount storage unit.
As illustrated in FIG. 6, the communication volume storage unit 212 stores the total communication volume of each communication source combination for each predetermined period (1 month in the example of FIG. 6) measured by the communication volume measurement unit 208. Will be done.

In the communication volume storage unit 212 illustrated in FIG. 6, for example, the total communication volume of the communication source destination combination “source A1 → destination D1” is “15 Gbyte” in November 2017 (2017/11), and is 2017. It is shown that it is "10 Gbyte" in December (2017/12) and "13 Gbyte" in January 2018 (2018/1).

The communication volume storage unit 212 illustrated in FIG. 6 may also store the combination of the source IP address and the destination IP address as the communication source destination combination.

FIG. 7 is a diagram illustrating the maximum value of the communication priority stored in the priority storage unit.
As illustrated in FIG. 7, the priority storage unit 213 has the maximum communication priority of each communication source combination acquired by the priority acquisition unit 209 for each predetermined period (one month in the example of FIG. 7). The value is stored.

In the priority storage unit 213 illustrated in FIG. 7, for example, the maximum value of the communication priority of the communication source destination combination “source A1 → destination D1” is “5” in November 2017, and is December 2017. It is "5", which indicates that it is "6" in January 2018.

The priority storage unit 213 illustrated in FIG. 7 may also store the combination of the source IP address and the destination IP address as the communication source destination combination.

FIG. 8 is a diagram illustrating the retransmission rate stored in the retransmission rate storage unit.
As illustrated in FIG. 8, the retransmission rate storage unit 214 stores the retransmission rate of each communication source combination acquired by the retransmission rate acquisition unit 210 for each predetermined period (1 month in the example of FIG. 8). NS.

In the retransmission rate storage unit 214 illustrated in FIG. 8, for example, the retransmission rate of the communication source destination combination “source A1 → destination D1” was “2%” in November 2017 and “2” in December 2017. It is "%", which indicates that it is "1%" in January 2018.

The retransmission rate storage unit 214 illustrated in FIG. 8 may also store the combination of the source IP address and the destination IP address as the communication source destination combination.

FIG. 9 is a diagram illustrating a first weighting table stored in the first weighting table storage unit.

As illustrated in FIG. 9, the first weighting table is the first with respect to the difference detected by the first difference detection unit 215 (difference of the communication source combination for each communication source segment combination with respect to the previous predetermined period). Stores the weighted value of 1.

In the first weighting table illustrated in FIG. 9, "-1" is stored as the first weighting value when the change represented by the difference (change in the communication source combination) indicates "decrease", and "-1" is stored. "0" is stored as the first weighting value when "maintaining" (no change) is shown, and "1" is stored as the first weighting value when showing "increase".

FIG. 10 is a diagram illustrating a second weighting table stored in the second weighting table storage unit.

As illustrated in FIG. 10, the second weighting table is a second with respect to the difference detected by the second difference detection unit 216 (difference in the total communication amount for each communication source segment combination with respect to the previous predetermined period). Stores the weighted value of.

In the second weighting table illustrated in FIG. 10, "-2" is stored as the second weighting value when the change (change in communication volume) represented by the difference indicates "decrease", and "maintenance". "0" is stored as the second weighting value when (no change) is shown, and "2" is stored as the second weighting value when "increase" is shown.

FIG. 11 is a diagram illustrating a third weighting table stored in the third weighting table storage unit.

As illustrated in FIG. 11, the third weighting table is a difference detected by the third difference detection unit 217 (difference in the maximum value of the communication priority for each communication source segment combination with respect to the previous predetermined period). Stores a third weighted value for.

In the third weighting table illustrated in FIG. 11, "-3" is stored as the third weighting value when the change represented by the difference (change in communication priority) indicates "decrease in priority". "0" is stored as a third weighting value when "maintenance" (no change) is shown, and "3" is stored as a third weighting value when "priority increase" is shown.

FIG. 12 is a diagram illustrating a fourth weighting table stored in the fourth weighting table storage unit.

As illustrated in FIG. 12, the fourth weighting table is a second with respect to the difference detected by the fourth difference detection unit 218 (difference in the retransmission rate aggregation result for each communication source segment combination with respect to the previous predetermined period). Stores the weighted value of 4.

In the fourth weighting table illustrated in FIG. 12, "0" is stored as the fourth weighting value when the change represented by the difference (change in retransmission rate) indicates "decrease", and "maintenance" (maintenance) ( “0” is stored as the fourth weighting value when indicating “no change), and “-2” is stored as the fourth weighting value when indicating “increase”.

FIG. 13 is a diagram illustrating an increase / decrease value regulation table stored in the increase / decrease value regulation table storage unit.

As illustrated in FIG. 13, the increase / decrease value specification table stores the reserved band ratio increase / decrease value with respect to the first weighted value, the second weighted value, the third weighted value, and the fourth weighted value.

In the increase / decrease value specification table illustrated in FIG. 13, for example, in the first row, the first weighted value is "-1", the second weighted value is "-2", and the third weighted value is "-3". And, it is shown that the secured band ratio increase / decrease value is "-6%" with respect to the case where the fourth weighting value is "0".

The increase / decrease value specification table illustrated in FIG. 13 is shown in the first weighting table exemplified in FIG. 9, the second weighting table exemplified in FIG. 10, the third weighting table exemplified in FIG. 11, and FIG. It corresponds to the fourth weighting table illustrated, and stores the "secured bandwidth ratio increase / decrease value" for all 54 ways. Further, in the increase / decrease value regulation table illustrated in FIG. 13, the total value of the first weighted value, the second weighted value, the third weighted value, and the fourth weighted value is set as the secured band ratio increase / decrease value.

Next, the processing related to the communication band control executed by the router 20 will be described.
In the router 20, for example, the following processing is performed as the processing related to the communication band control.

The communication band control unit 206 controls the band of communication between the segments 10 according to the communication band regulation table stored in the communication band regulation table storage unit 201. For example, when the bandwidth of communication is controlled according to the communication bandwidth regulation table illustrated in FIG. 4, the bandwidth control of the bandwidth control rule number "1" is performed in the communication in which the source segment is segment A and the destination segment is segment D. According to the rules, the communication bandwidth is controlled so that the secured bandwidth ratio is 10%.

Further, the communication source combination acquisition unit 207 acquires the communication source combination, which is stored in the communication source combination storage unit 211 as illustrated in FIG. Further, the communication amount measurement unit 208 measures the total communication amount for each combination of communication source destinations, and stores the total communication amount in the communication amount storage unit 212 as illustrated in FIG. Further, the priority acquisition unit 209 acquires the maximum value of the communication priority for each communication source destination combination, and stores it in the priority storage unit 213 as illustrated in FIG. 7. Further, the retransmission rate acquisition unit 210 acquires the retransmission rate for each combination of communication source destinations, and stores the retransmission rate in the retransmission rate storage unit 214 as illustrated in FIG.

Further, in the router 20, the communication band specification table change process is performed every predetermined period (for example, one month).

FIG. 14 is a flowchart illustrating a communication band regulation table change process executed in the router which is the communication band control device according to the embodiment.

As illustrated in FIG. 14, when the communication band specification table change process is started, first, in S1401, the first difference detection unit 215 refers to the communication source destination combination storage unit 211 and makes a reference to the previous predetermined period. Detects the difference in the communication source combination for each communication source segment combination. Then, the increase / decrease value determination unit 219 refers to the first weighting table stored in the first weighting table storage unit 220, and refers to the communication source segment combination according to the detection result of the first difference detection unit 215. The first weighting value for each is determined.

For example, in the communication source combination storage unit 211 illustrated in FIG. 5, the communication source destination segment combination corresponding to the bandwidth control rule whose bandwidth control rule number is “1” (the source segment is segment A and the destination segment is segment D). Focusing on (the combination), the number of destination combinations in November 2017 is two, while the number of destination combinations in December 2017 is three. Therefore, the number of combinations of communication sources in December 2017 has increased compared to November 2017. In this case, according to the first weighting table illustrated in FIG. 9, the first weighting value for the communication source segment combination is determined to be "1".

In S1402, the second difference detection unit 216 calculates the total communication amount for each communication source segment combination for the predetermined period with reference to the communication amount storage unit 212, and the communication source destination with respect to the previous predetermined period. Detects the difference in total traffic for each segment combination. Then, the increase / decrease value determination unit 219 refers to the second weighting table stored in the second weighting table storage unit 221 and sets the communication source segment according to the detection result of the second difference detection unit 216. A second weighting value is determined for each.

For example, in the traffic storage unit 212 illustrated in FIG. 6, the communication source segment combination in which the source segment is segment A and the destination segment is segment D (corresponding to the bandwidth control rule whose bandwidth control rule number is “1”). Focusing on the communication source segment combination), the total communication volume in November 2017 was 16 (= 15 + 1) Gbyte, while the total communication volume in December 2017 was 21 (= 10 + 1 + 10) Gbyte. ing. Therefore, the total traffic in December 2017 has increased compared to November 2017. In this case, according to the second weighting table illustrated in FIG. 10, the second weighting value for the communication source segment combination is determined to be "2".

In S1403, the third difference detection unit 217 acquires the maximum value of the communication priority for each communication source segment combination for the predetermined period with reference to the priority storage unit 213, and obtains the maximum value of the communication priority with respect to the previous predetermined period. Detects the difference in the maximum value of communication priority for each communication source segment combination. Then, the increase / decrease value determination unit 219 refers to the third weighting table stored in the third weighting table storage unit 222, and refers to the communication source segment combination according to the detection result of the third difference detection unit 217. A third weighting value is determined for each.

For example, in the priority storage unit 213 illustrated in FIG. 7, paying attention to the communication source segment combination in which the source segment is segment A and the destination segment is segment D, the maximum value of the communication priority in November 2017 is While it is 5, the maximum value of communication priority in December 2017 is also 5. Therefore, the maximum value of the communication priority in December 2017 is unchanged from that in November 2017. In this case, according to the third weighting table illustrated in FIG. 11, the third weighting value for the communication source segment combination is determined to be “0”.

In S1404, the fourth difference detection unit 218 refers to the retransmission rate storage unit 214, aggregates the retransmission rate for each communication source segment combination for the predetermined period, and aggregates the retransmission rate for each communication source segment combination with respect to the previous predetermined period. Detects the difference in the retransmission rate aggregation result for each combination. Then, the increase / decrease value determination unit 219 refers to the fourth weighting table stored in the fourth weighting table storage unit 223, and refers to the communication source segment combination according to the detection result of the fourth difference detection unit 218. A fourth weighting value is determined for each.

For example, in the retransmission rate storage unit 214 illustrated in FIG. 8, paying attention to the communication source segment combination in which the source segment is segment A and the destination segment is segment D, in November 2017 and December 2017, The retransmission rate of the communication source combination of "source A1 → destination D1" is the same (both are "2%"). Further, the retransmission rate of the communication source combination of "source A1 → destination D2" is also the same (both are "1%"). On the other hand, the retransmission rate of the communication source combination of "source A2 → destination D1" is 2017, while the communication itself was not performed in November 2017 (substantially the retransmission rate is 0%). In December of the year, it was "10%". Therefore, the total result of the retransmission rate in December 2017 has increased compared to November 2017. In this case, according to the fourth weighting table illustrated in FIG. 12, the fourth weighting value for the communication source segment combination is determined to be "-2".

In S1405, the increase / decrease value determination unit 219 refers to the increase / decrease value regulation table stored in the increase / decrease value regulation table storage unit 224, and in S1402, the first weighting value for each communication source segment combination determined in S1401. The second weighted value for each communication source segment combination determined in S1403, the third weighting value for each communication source segment combination determined in S1403, and the fourth weighted value for each communication source segment combination determined in S1404. The value for increasing or decreasing the secured band ratio for each communication source segment combination is determined according to the weighting value.

For example, the first weighted value is "1", the second weighted value is "2", and the second weighted value is "2" for the communication source segment combination in which the source segment is segment A and the destination segment is segment D. When the weighting value of 3 is "0" and the fourth weighting value is "-2", the secured band ratio for the communication source segment combination is according to the increase / decrease value regulation table illustrated in FIG. The increase / decrease value will be determined to be "1%" (see the third row from the bottom of the increase / decrease value regulation table).

In S1406, the communication band specification table changing unit 205 sets the communication source destination of the communication band specification table stored in the communication band specification table storage unit 201 according to the reserved bandwidth ratio increase / decrease value for each communication source segment combination determined in S1405. Change the reserved bandwidth ratio for each segment combination.

For example, when the reserved bandwidth ratio increase / decrease value for the communication source segment combination in which the source segment is segment A and the destination segment is segment D is “1%”, the bandwidth of the bandwidth control regulation table illustrated in FIG. 4 is used. The secured bandwidth ratio of the bandwidth control rule whose control rule number is "1" will be changed from 10% to 11 (10 + 1)%.

When S1406 ends, the communication band specification table change process ends.
As described above, according to the present embodiment, it is possible to change the reserved bandwidth ratio for each communication source segment combination specified in the communication bandwidth specification table according to the communication status via the router 20. .. Further, the communication status is not limited to the change of one element of the communication source combination, the communication amount, the communication priority, and the retransmission rate, and the reserved bandwidth ratio is set according to the change of a plurality of the elements. Can be changed. Further, by appropriately weighting the change of each element in advance by using four weighting tables (first to fourth weighting tables), the reserved bandwidth ratio can be changed more appropriately. be able to.

Therefore, when the user's network usage scene changes, the communication band setting can be changed automatically and appropriately.

In this embodiment, the router 20 is realized by, for example, the following hardware configuration.

FIG. 15 is a diagram illustrating a hardware configuration of a router which is a communication band control device according to an embodiment.

As illustrated in FIG. 15, the router 20 includes a CPU (Central Processing Unit) 231, a memory 232, an external storage device 233, and a network connection device 234, which are connected to each other by a bus 235.

The memory 232 is, for example, a semiconductor memory such as a ROM (Read Only Memory), a RAM (Random Access Memory), or a flash memory, and stores a program and data used for processing. The CPU 231 performs various processes (including processes related to communication band control such as communication band regulation table change process) by executing a program using the memory 232.

The external storage device 233 is, for example, a hard disk drive. The router 20 can store programs and data in the external storage device 233 and load them into the memory 232 for use.

As described above, computer-readable recording media for storing programs and data used for processing include physical (non-temporary) recording media such as memory 232 and external storage device 233.

The network connection device 234 is a communication interface that is connected to a network (plurality of segments 10) and communicates with an external device (server 11, PC 12, etc.). The router 20 can also receive programs and data from an external device via the network connection device 234 and load them into the memory 232 for use.

The communication band regulation table storage unit 201, the communication status storage unit 203 (communication source destination combination storage unit 211, communication volume storage unit 212, priority storage unit 213, retransmission rate storage unit 214), first weighted table storage unit. The 220, the second weighted table storage unit 221 and the third weighted table storage unit 222, the fourth weighted table storage unit 223, and the increase / decrease value specification table storage unit 224 are the memory 232 or the external storage device 233, or the memory. It can be realized by 232 and an external storage device 233.

Further, in the processing related to the communication band control executed by the router 20 in the present embodiment, the acquisition of the communication source combination and the communication source for the communication via the router 20 for each predetermined period are obtained. measurement of total communication amount for each previous combinations, obtaining the maximum value of the communication priority of the communication source destination for each combination, and only one or two of the acquired retransmission rate of the communication source destination for each combination is performed May be good. In this case, based on the results of that, it is also possible to determine the reserved bandwidth percentage variation value for the communication source destination segment for each combination.

Further, in the present embodiment, the communication system 1 may be configured to include a plurality of routers 20. In this case, the communication system 1 may be configured so that, for example, a router 20 to which a plurality of segments 10 are connected and another router 20 to which another plurality of segments 10 are connected are connected.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various improvements and changes can be made without departing from the gist of the present invention.

1 Communication system 10 segments 11 server 12 PC
20 Router 201 Communication band regulation table storage unit 202 Communication status acquisition unit 203 Communication status storage unit 204 Analysis unit 205 Communication band regulation table change unit 206 Communication band control unit 207 Communication source combination acquisition unit 208 Communication volume measurement unit 209 Priority acquisition Unit 210 Retransmission rate acquisition unit 211 Communication source combination storage unit 212 Communication volume storage unit 213 Priority storage unit 214 Retransmission rate storage unit 215 First difference detection unit 216 Second difference detection unit 217 Third difference detection unit 218 Fourth difference detection unit 219 Increase / decrease value determination unit 220 First weighted table storage unit 221 Second weighted table storage unit 222 Third weighted table storage unit 223 Fourth weighted table storage unit 224 Increase / decrease value specification table storage unit 231 CPU
232 Memory 233 External storage 234 Network connection 235 Bus

Claims (9)

A communication band control device that controls the communication band.
A communication band specification table storage unit that stores a communication band specification table that specifies the communication band for each combination of communication source segments and communication destination segments, which is a combination of the communication source segment and the communication destination segment.
For each predetermined period, the communication source combination which is a combination of the communication source and the communication destination, the total communication amount for each communication source combination, and the communication for the communication via the communication band control device for the predetermined period. communication priority maximum value of Motosaki each combination, and a communication status acquisition section that acquires and any one or more of the retransmission rate of said communication source destination for each combination,
The total communication amount of the communication source combination and the communication source combination acquired by the communication status acquisition unit, the maximum value of the communication priority for each communication source combination, and each communication source combination. a communication status storage unit for storing and any one or more of the retransmission rate,
The total communication amount of the communication source combination and the communication source combination stored in the communication status storage unit, the maximum value of the communication priority for each communication source combination, and each communication source combination. An analysis unit that analyzes the communication status for each combination of communication source segments based on any one or more of the retransmission rates, and an analysis unit.
Based on the analysis result of the analysis unit, the communication band specification table change unit that changes the communication band specification table stored in the communication band specification table storage unit, and the communication band specification table change unit.
A communication band control unit that controls the bandwidth of communication via the communication band control device according to the communication band specification table stored in the communication band specification table storage unit.
A communication band control device comprising. The communication status acquisition unit
A communication source combination acquisition unit that acquires the communication source combination, and a communication source combination acquisition unit.
A communication volume measuring unit that measures the total communication volume for each combination of communication source destinations,
A priority acquisition unit that acquires the maximum value of communication priority for each communication source combination, and
A retransmission rate acquisition unit that acquires a retransmission rate for each combination of communication source destinations, and a retransmission rate acquisition unit.
including,
The communication band control device according to claim 1. The communication status storage unit is
A communication source combination storage unit that stores the communication source combination acquired by the communication source combination acquisition unit, and a communication source combination storage unit.
A communication volume storage unit that stores the total communication volume measured by the communication volume measurement unit, and a communication volume storage unit.
A priority storage unit that stores the maximum value of the communication priority acquired by the priority acquisition unit, and
A retransmission rate storage unit that stores the retransmission rate acquired by the retransmission rate acquisition unit, and a retransmission rate storage unit.
Including
The analysis unit has the communication source combination stored in the communication source combination storage unit, the total communication amount stored in the communication amount storage unit, and the communication priority stored in the priority storage unit. Based on the maximum value of the degree and the retransmission rate stored in the retransmission rate storage unit, the communication status for each combination of the communication source destination segments is analyzed.
2. The communication band control device according to claim 2. The analysis unit
First, for each predetermined period, the difference of the communication source combination for each communication source segment combination with respect to the previous predetermined period is detected from the communication source combination stored in the communication source combination storage unit. Difference detector and
For each predetermined period, the total communication amount for each combination of the communication source segments per the predetermined period is calculated from the total communication amount stored in the communication amount storage unit, and the communication with respect to the previous predetermined period. A second difference detection unit that detects the difference in total communication volume for each combination of destination segments,
For each predetermined period, the maximum value of the communication priority for each combination of the communication source segments for the predetermined period is acquired from the maximum value of the communication priority stored in the priority storage unit, and the previous time is described. A third difference detection unit that detects the difference in the maximum value of the communication priority for each communication source segment combination with respect to a predetermined period, and
For each predetermined period, based on the retransmission rate stored in the retransmission rate storage unit, the retransmission rate for each combination of communication source segments per predetermined period is totaled, and the communication with respect to the previous predetermined period. A fourth difference detection unit that detects the difference in the retransmission rate aggregation result for each destination segment combination, and
The communication is based on the detection result of the first difference detection unit, the detection result of the second difference detection unit, the detection result of the third difference detection unit, and the detection result of the fourth difference detection unit. An increase / decrease value determination unit that determines the increase / decrease value of the communication band for each destination segment combination,
With
The communication band specification table change unit changes the communication band specification table stored in the communication band specification table storage unit based on the increase / decrease value determined by the increase / decrease value determination unit.
The communication band control device according to claim 3. The increase / decrease value determination unit includes a first weighted value according to the detection result of the first difference detection unit, a second weighted value according to the detection result of the second difference detection unit, and the third difference. A third weighting value according to the detection result of the detection unit and a fourth weighting value according to the detection result of the fourth difference detection unit are determined, and the first weighting value and the second weighting value are determined. , The increase / decrease value is determined according to the third weighting value and the fourth weighting value.
The communication band control device according to claim 4. A first weighting table storage unit that stores a first weighting table that defines the first weighting value for the detection result of the first difference detection unit, and a first weighting table storage unit.
A second weighting table storage unit that stores a second weighting table that defines the second weighting value for the detection result of the second difference detection unit, and a second weighting table storage unit.
A third weighting table storage unit that stores a third weighting table that defines the third weighting value for the detection result of the third difference detection unit, and a third weighting table storage unit.
A fourth weighting table storage unit that stores a fourth weighting table that defines the fourth weighting value for the detection result of the fourth difference detection unit, and a fourth weighting table storage unit.
Further prepare
The increase / decrease value determination unit
The first weighting value is determined according to the first weighting table stored in the first weighting table storage unit.
The second weighting value is determined according to the second weighting table stored in the second weighting table storage unit.
The third weighting value is determined according to the third weighting table stored in the third weighting table storage unit.
The fourth weighting value is determined according to the fourth weighting table stored in the fourth weighting table storage unit.
The communication band control device according to claim 5. Further, an increase / decrease value specification table storage unit for storing the increase / decrease value specification table that defines the first weight value, the second weight value, the third weight value, and the increase / decrease value with respect to the fourth weight value is further provided. Prepare,
The increase / decrease value determination unit determines the increase / decrease value according to the increase / decrease value regulation table stored in the increase / decrease value regulation table storage unit.
The communication band control device according to claim 5 or 6. A communication band control method executed in a communication band control device including a communication band specification table storage unit that stores a communication band specification table that specifies a communication band for each communication source segment combination that is a combination of a communication source segment and a communication destination segment. And
For each predetermined period, the communication source combination which is a combination of the communication source and the communication destination, the total communication amount for each communication source combination, and the communication for the communication via the communication band control device for the predetermined period. communication priority maximum value of Motosaki each combination, and obtains the any one or more of the retransmission rate of said communication source destination for each combination stored in the communication status storage unit,
The total communication amount of the communication source combination and the communication source combination stored in the communication status storage unit, the maximum value of the communication priority for each communication source combination, and each communication source combination. based on the any one or more of the retransmission rate, analyzes the communication status of the communication source destination segment for each combination,
Based on the result of the analysis, the communication band specification table stored in the communication band specification table storage unit is changed.
Bandwidth control of communication via the communication band control device is performed according to the communication band specification table stored in the communication band specification table storage unit.
A communication band control method characterized by this. A computer of a communication band control device including a communication band specification table storage unit that stores a communication band specification table that specifies a communication band for each communication source segment combination that is a combination of a communication source segment and a communication destination segment.
For each predetermined period, the communication source combination which is a combination of the communication source and the communication destination, the total communication amount for each communication source combination, and the communication for the communication via the communication band control device for the predetermined period. communication priority maximum value of Motosaki each combination, and obtains the any one or more of the retransmission rate of said communication source destination for each combination stored in the communication status storage unit,
The total communication amount of the communication source combination and the communication source combination stored in the communication status storage unit, the maximum value of the communication priority for each communication source combination, and each communication source combination. based on the any one or more of the retransmission rate, analyzes the communication status of the communication source destination segment for each combination,
Based on the result of the analysis, the communication band specification table stored in the communication band specification table storage unit is changed.
Bandwidth control of communication via the communication band control device is performed according to the communication band specification table stored in the communication band specification table storage unit.
A communication bandwidth control program characterized by executing the process.

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