JP2011254296A - Information processing apparatus and information processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processing apparatus that makes it possible to maintain routing even when data having a high possibility of exerting an influence on the routing is sent out to a network.SOLUTION: An information processing apparatus, which is connected to a network control apparatus that performs control over at least one of routing, topology, and band allocation based on an observed value of a load or quality of a network, includes: a memory for storing a threshold value that relates to the observed value that is used to determine whether the network control apparatus should execute the control; and a control unit for, when data that changes the observed value to be equal to or greater than the threshold value is sent out to the network, uniformizing the load or the quality in the network.

Description

  The present invention relates to an information processing apparatus connected to a network and an information processing method.

  In communication between a server and an information terminal that performs communication between a server and an information terminal via a network, it is effective to reduce communication delay in order to improve communication quality. Therefore, it is considered to move the server function to another server on the network so that the delay between the server and the information terminal is minimized. This will be described with reference to FIG.

  FIG. 12 is a diagram illustrating a configuration example of a related communication system. As shown in FIG. 12, the network 201 has a plurality of routers 210a to 210g, and these routers are connected to each other by communication lines. The server 151 is connected to the network 201 via the router 210c, and the server 152 is connected to the network 201 via the router 210g.

  In the first stage, the information terminal 161 is connected to the router 210f. The information terminal 161 at this time is indicated by a broken line. The information terminal 161 is a portable terminal, for example, a notebook personal computer (hereinafter abbreviated as PC). In this figure, for simplicity of explanation, the information terminal 161 is shown connected to the network 201 via a router, but the information terminal 161 is connected to a hub (not shown) or a radio base station (not shown). You may connect with the network 201 via.

  When the user operates the information terminal 161, the information terminal 161 exchanges data with the server 152. Thereafter, the user disconnects the information terminal 161 from the network 201 once, carries the information terminal 161 and moves to a location, and connects the information terminal 161 to the network 201 via the router 210b.

  If the communication delay between the information terminal 161 and the server 152 is greater after the movement than the movement of the information terminal 161, if there is another server with a smaller communication delay with the information terminal 161, the server The user can work more efficiently by moving the function of 152 to the server and performing communication between the server and the information terminal 161. In the case shown in FIG. 12, if the communication delay between the information terminal 161 and the server 151 after movement is smaller than the communication delay between the information terminal 161 and the server 152 after movement, the function of the server 152 is moved to the server 151. The information terminal 161 may be connected to the server 151.

  Transfer of the functions of the server 152 requires at least the transfer of an OS (Operating System) and application programs used by the user on the server 152. Transfer of these OS and application programs is performed by data transfer processing in the same manner as file transfer.

  Here, the configuration of the routers 210a to 210g that perform file transfer will be briefly described. Since the routers 210a to 210g have the same configuration, the configuration of the router 210a will be described.

  FIG. 13 is a block diagram showing an example of the configuration of the router shown in FIG. As a communication protocol, TCP (Transmission Control Protocol) / IP (Internet Protocol) used in the Internet is used.

  As illustrated in FIG. 13, the router 210 a includes a control unit 95 including a TCP layer control unit 30 and an IP layer control unit 140. The TCP layer control unit 30 includes an ftp transfer unit 31 that transfers a file to the IP layer control unit 140 using ftp (file transfer protocol). When a file with a large amount of data is input, when the TCP layer control unit 30 receives the file from the network, the TCP layer control unit 30 passes the data to the IP layer control unit 140 at the maximum speed (rate) allowed for TCP. The IP layer control unit 140 sends the data received from the TCP layer control unit 30 to the network at the maximum rate allowed as IP.

  Since the communication quality is improved as the communication delay is smaller, it is desirable that the destination of the function of the server 152 be smaller in consideration of the position of the information terminal 161 operated by the user and the delay state of the network 201. .

  Here, it will be explained that the communication delay is not necessarily proportional to the inter-device distance. In FIG. 12, the physical distance between the server 151 and the information terminal 161 appears to be smaller than the physical distance between the server 152 and the information terminal 161, but even if the physical distance between the communicating devices is reduced, The delay is not necessarily reduced. As shown in FIG. 12, in the state after the information terminal 161 is moved, for example, the path between the server 152 and the information terminal 161 has a wider bandwidth than the path between the server 151 and the information terminal 161. In this case, even if the route is long, the delay may be small. The destination of the server function is determined in consideration of the bandwidth.

  On the other hand, in order to control the quality of service (QoS) of a network, routing control that performs dynamic routing according to the communication status of the network has been proposed. Here, QoS is communication quality defined by measures such as delay, packet discard, and throughput. Routing is the determination of a logical inter-router connection in which a router actually transfers a packet with respect to a physical inter-router connection, such as OSPF (Open Shortest Path First) or BGP (Border Gateway Protocol). Refers to routing determined by a routing protocol.

  In this OSPF, a method of determining the shortest path by QoS such as actually observed delay is known. In this case, since QoS varies according to network traffic variation, routing also varies. This is called dynamic routing, and its control is called dynamic routing control. In the following description, dynamic routing is simply referred to as “routing” and dynamic routing control is simply referred to as “routing control”, unless it is expressed separately from static routing.

  Since a file has a large amount of data, when communication traffic occurs due to file transfer, the load on the network increases and QoS changes. When this change exceeds a threshold value that is a criterion for determining whether or not to perform routing control, routing changes. In routing control, an interval (hereinafter referred to as an observation period) when observing QoS is determined in advance, and QoS is observed for each observation period, and control is performed using the statistical value.

  Assume that the average value of QoS during the observation period is used as the statistical value. For example, if the observation period is very long, and the variation in QoS is small and temporary with respect to the length of the observation period, the statistical value hardly changes in a plurality of observation periods, so the standard deviation is small. Become. As a result, routing control is not performed and routing does not change. On the other hand, when the observation period is short and the QoS variation is large and long-term with respect to the length of the period, the statistical value changes greatly in a plurality of observation periods, and thus the standard deviation becomes large. As a result, routing control is performed and routing changes.

  Rather than the above-mentioned dynamic routing control, an example of a technique close to static routing control is disclosed in Patent Document 1. Patent Document 1 describes that when a traffic load between two routers becomes excessive, the network control device performs load balancing control. The routing changes as the network control device performs load balancing control.

JP 2009-224947 A

  When transferring a file with a large amount of data to move the function of the server, as described above, if the network load increases and QoS changes, routing changes. Therefore, even if the function of the server is moved to another server having a small delay in communication with the information terminal, there is a possibility that the communication delay between the information terminal and the server becomes large due to the change in routing.

  This will be described with reference to FIGS. The IP layer control unit 140 of the router 210a transmits a file to be transferred at the maximum rate allowed by TCP. Therefore, there is a high possibility that more serious congestion will occur in the network 201. If serious congestion occurs in the network 201 due to this file transfer, routing may change during or after the file transfer. At this time, although the function of the server 152 should have been moved to the server 151 with a small delay, there is a possibility that the communication delay between the information terminal 161 and the server 151 becomes large due to the change of the routing.

  Furthermore, the fact that a change in routing increases communication delay will be specifically described with reference to FIG.

  For example, it is assumed that the communication path between the information terminal 161 and the server 151 is a path 301 connecting the router 210b → the router 210d → the router 210c before the change of routing. When file transfer is performed from the server 152 to the server 151, congestion occurs in the route connecting the router 210c and the router 210d, and the routing changes. Due to the change in routing, the communication path between the information terminal 161 and the server 151 may be changed to a path 302 connecting the router 210b → the router 210d → the router 210e → the router 210c. Assuming that the bandwidth is uniform among all routers, the communication path between the information terminal 161 and the server 151 becomes longer after the change than before the change in routing, resulting in an increase in communication delay. . Further, if the bandwidth of the path 302 is narrower than the bandwidth of the path 301, the communication rate will be slower after the change of routing than before the change.

  The cause of the problem is that the transfer of a file with a large amount of data affects the routing, which changes the routing and makes the meaning of the routing before the change meaningless. This problem can also occur in the technique disclosed in Patent Document 1.

  The present invention has been made to solve the problems of the above-described technology. Even if data having a high possibility of affecting routing, such as large-capacity data, is sent to the network, routing is not performed. An object is to provide an information processing apparatus and an information processing method that can be maintained.

In order to achieve the above object, an information processing apparatus according to the present invention performs network control for controlling at least one of routing, topology, and bandwidth allocation of a network based on an observation value of the load or quality of the network. An information processing apparatus connected to the apparatus,
A memory for storing a threshold value related to the observation value, which is used to determine whether or not the network control device executes the control;
When transmitting data that changes the observed value to the threshold value or more to the network, an identifier for specifying the data and a request that the control is not executed even if the data is detected are sent to the network control device. A control unit to transmit;
It is the structure which has.

The information processing apparatus of the present invention is connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of the load or quality of the network. An information processing apparatus,
A memory for storing a threshold value related to the observation value, which is used to determine whether or not the network control device executes the control;
A control unit that equalizes the load or the quality in the network when sending data that changes the observed value to the threshold value or more to the network;
It is the structure which has.

The information processing apparatus of the present invention is connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of the load or quality of the network. An information processing apparatus,
A memory for storing a threshold value related to the observation value, which is used to determine whether or not the network control device executes the control;
When sending data to the network, a control unit for sending the data to the network in a range where the observation value does not exceed the threshold;
It is the structure which has.

On the other hand, the information processing method of the present invention for achieving the above object performs control for at least one of routing, topology, and bandwidth allocation of the network based on an observation value of the load or quality of the network. An information processing method by an information processing device connected to a network control device,
Based on a threshold related to the observed value used to determine whether or not the network control device executes the control, determine whether or not the transmission target data changes the observed value to be equal to or greater than the threshold,
When it is determined that the transmission target data changes the observation value to be equal to or greater than the threshold value, an identifier for specifying the transmission target data and a request that the control is not executed even when the data is detected are included. Send threshold insensitivity information to the network control device,
After transmitting the threshold value insensitive information, the data to be transmitted is transmitted to the network.

Further, the information processing method of the present invention is connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of the load or quality of the network. An information processing method by an information processing apparatus,
Based on a threshold related to the observed value used to determine whether or not the network control device executes the control, determine whether or not the transmission target data changes the observed value to be equal to or greater than the threshold,
When it is determined that the transmission target data changes the observed value to be equal to or greater than the threshold value, the load or the quality is made uniform in the network, and the transmission target data is transmitted to the network.

Furthermore, the information processing method of the present invention is connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of the load or quality of the network. An information processing method by an information processing apparatus,
Based on a threshold related to the observed value used to determine whether or not the network control device executes the control, determine whether or not the transmission target data changes the observed value to be equal to or greater than the threshold,
When it is determined that the transmission target data changes the observation value to be equal to or greater than the threshold value, the transmission target data is transmitted to the network in a range where the observation value does not exceed the threshold value.

  According to the present invention, even if a large amount of data is transferred via a network, it is possible to suppress a change in routing and maintain the routing before data transfer.

It is a figure which shows an example of the communication system containing the relay apparatus of 1st Embodiment. FIG. 2 is a block diagram illustrating a configuration example of a router illustrated in FIG. 1. It is a block diagram which shows the example of 1 structure of the relay apparatus of 1st Embodiment. It is a flowchart which shows the procedure of the information processing method in 1st Embodiment. It is a block diagram which shows the example of 1 structure of the relay apparatus of 2nd Embodiment. It is a flowchart which shows the procedure of the information processing method in 2nd Embodiment. It is a block diagram which shows the example of 1 structure of a network control apparatus. It is a block diagram which shows the example of 1 structure of the relay apparatus of 3rd Embodiment. It is a flowchart which shows the procedure of the information processing method in 3rd Embodiment. It is a figure which shows an example of the communication system containing the server of 4th Embodiment. It is a block diagram which shows one structural example of the server of 4th Embodiment. It is a figure which shows the example of 1 structure of a related communication system. FIG. 13 is a block diagram illustrating a configuration example of a router illustrated in FIG. 12.

  In this embodiment, the communication protocol is described as TCP / IP used on the Internet. However, the communication protocol is not limited to TCP / IP, but other communication protocols such as X25, frame relay, or ATM (Asynchronous Transfer). (Mode) method can also be executed. In the following, the same components as those described in FIGS. 12 and 13 are denoted by the same reference numerals, and detailed description thereof is omitted.

(First embodiment)
The information processing apparatus of the present embodiment is a relay apparatus such as a router and a gateway apparatus that performs data transfer. The configuration of the relay device of this embodiment will be described.

  FIG. 1 is a diagram illustrating an example of a communication system including a relay device according to the present embodiment.

  As shown in FIG. 1, a relay device 10 according to the present embodiment is connected to a network 101. A plurality of routers 110 a to 110 f are connected to the network 101. In the present embodiment, the routers 110a to 110f correspond to network control devices that dynamically control routing. Hereinafter, although the control target of the routers 110a to 110f will be described in the case of routing, the routers 110a to 110f may have any one or more of routing, topology, and bandwidth allocation as control targets.

  FIG. 2 is a block diagram showing an example of the configuration of the router shown in FIG. Since the routers 110a to 110f have the same configuration, the configuration of the router 110a will be described.

  As illustrated in FIG. 2, the router 110 a includes a control unit 95, a routing control unit 112 that dynamically performs routing control, and a storage unit 114. The storage unit 114 stores a routing table and a control algorithm related to network control. In addition, a threshold value, which is a reference value related to the observed value of the load or quality of the network, used for determining whether or not the router 110a performs routing control is stored in the storage unit 114. The network load and quality are related so that the quality deteriorates as the traffic rate, which is a kind of network load, increases. Any of these may be monitored, but here, it is assumed that the observed value is a traffic rate.

  The routers 110a to 110f are devices that dynamically perform network control. As exemplified in Patent Document 1, the router is a device that performs static routing control, and the control target is dynamically assigned to the router. A network control device to be controlled may be provided separately. In the following description, reference numeral “110” is used when referring to an arbitrary router among the routers 110a to 110f.

  FIG. 3 is a block diagram showing an example of the configuration of the relay apparatus of this embodiment, and shows functional blocks corresponding to the protocol stack.

  As illustrated in FIG. 3, the relay device 10 includes a control unit 20 and a memory 21. The control unit 20 includes a TCP layer control unit 30, an IP layer control unit 40, and a sublayer control unit 50. The relay device 10 is provided with a storage unit for storing data until data input from the outside is transferred to the outside, but the storage unit is not shown in the figure. . In addition, each of the TCP layer control unit 30, the IP layer control unit 40, and the sublayer control unit 50 is configured by a dedicated circuit for executing each function. Unit) may be configured by executing a program.

  The memory 21 stores the same threshold value as that stored in the storage unit 114 of the router 110. This threshold value is acquired directly from the router 110 by the control unit 20 and stored in the memory 21. Note that the control unit 20 may acquire a control algorithm from the router 110, and check the allowable traffic rate from the control algorithm to calculate a threshold value.

  The sublayer control unit 50 includes a transfer rate calculation unit 501 and an impact reduction control unit 502. The transfer rate calculation unit 501 obtains a value obtained by subtracting the current traffic rate in the network 101 from the threshold, and uses the obtained value as the transmission rate. The impact reduction control unit 502 passes information on the transmission rate calculated by the transfer rate calculation unit 501 to the IP layer control unit 40.

  Here, a specific example of a transmission rate calculation method will be described. The threshold value is an allowable delay increase rate x%. That is, when the increase rate of delay is x% or more, the router 110 executes routing control, but when the increase rate of delay is less than x%, the router 110 does not execute routing control.

  The transfer rate calculation unit 501 calculates the sum of the traffic rate generated when the data to be transmitted is sent and the current traffic rate in the network 101. Subsequently, the transfer rate calculation unit 501 calculates a delay with the M / M / 1 queue model using the calculated sum rate. If the calculated delay is the expected delay and the delay calculated from the current traffic rate is the current delay, the transfer rate calculation unit 501 obtains (expected delay / current delay) × 100 = y. The transfer rate calculation unit 501 compares x and y, and determines that the router 110 executes routing control when y ≧ x, and determines that the router 110 does not execute routing control when y <x. It is possible.

  The IP layer control unit 40 compares the transmission rate received from the sublayer control unit 50 with the maximum rate allowed for the IP, and sends data to the network 201 at a smaller one of these rates.

  Next, the procedure of the information processing method by the relay device 10 will be described. FIG. 4 is a flowchart showing the procedure of the information processing method of this embodiment.

  When the sublayer control unit 50 recognizes the capacity of data that the TCP layer control unit 30 passes to the IP layer control unit 40, the sublayer control unit 50 determines whether the traffic rate of the network is equal to or higher than the threshold by transmitting the data in the network 101. (Step 101).

  If the sublayer control unit 50 determines that the traffic rate is equal to or greater than the threshold value as a result of the determination in step 101, the sublayer control unit 50 calculates a transmission rate at which the traffic rate of the observed value does not exceed the threshold value (step 102). The IP layer control unit 40 is notified. The IP layer control unit 40 sends data to the network 101 at the smaller rate of the calculated rate received from the sublayer control unit 50 and the maximum rate allowed for the IP (step 103).

  On the other hand, as a result of the determination in step 101, when the sublayer control unit 50 determines that the traffic rate is less than the threshold, the sublayer control unit 50 instructs the IP layer control unit 40 to transmit data. The IP layer control unit 40 sends the data received from the TCP layer control unit 30 to the network 101 at the maximum rate allowed as IP (step 104).

  As described above, when the relay apparatus 10 transmits a large amount of data to the network 101, the relay apparatus 10 transmits the data to the network at a transmission rate at which the impact on the network 101 can be almost ignored. Therefore, the possibility that serious congestion will occur in the network 101 is reduced, and it is possible to suppress a change in routing.

  This will be described with reference to FIG. When the server 152 tries to transfer a large-capacity file to the server 151, the relay device 10 sends the data received from the server 152 to the server 151 at a lower transmission rate. As a result, the possibility of serious congestion occurring in the network 201 including the route of the relay device 10 → the router 110d → 110c is reduced, and the routing between the information terminal 161 and the server 151 can be suppressed from changing.

  The relay apparatus 10 may send data to the network 101 as follows so that the congestion is not observed in the router 110 as well as the method described above.

  The router 110 checks the status of the network 101 at regular time intervals and observes the load or quality of the network 101. This fixed interval is called an observation period. The memory 21 stores observation period information in addition to the threshold value. Similarly to the threshold value, this observation period information may be acquired directly from the router 110 by the relay apparatus 10 or may be derived from a control algorithm. The transfer rate calculation unit 501 calculates a transmission rate at which data to be transmitted can be delivered to its destination within the observation period. Upon receiving the transmission rate information from the transfer rate calculation unit 501, the impact reduction control unit 502 notifies the IP layer control unit 40 of the transmission rate information, and sends the data in accordance with the start time of the observation period. Instruct. At this time, if the calculated transmission rate is larger than the maximum rate allowed for the IP, the IP layer control unit 40 divides the data, and adjusts each of the divided data stepwise according to the start time of the observation period. Send it out.

  According to this method, when the relay apparatus 10 sends data to the network 101, congestion may occur instantaneously, but the data is transferred while the router 110 acquires the observation value. Therefore, at the next time when the router 110 acquires the observation value, the data transmitted from the relay device 10 has reached the server 151, and there is a high possibility that serious congestion has ended in the network. . As a result, serious congestion is not perceived by the router 110 and the possibility of routing changes is reduced.

  As another method, the relay device 10 may send data to the network 101 as follows.

  In the network 101 shown in FIG. 1, it is assumed that a communication link is established between the server 152 and the server 151. The bandwidth of the link (referred to as link A) between the relay device 10 and the router 110d is different from the bandwidth of the link (referred to as link B) between the router 110c and the router 110d. Suppose the bandwidth is greater than In this case, if data is transmitted at a transmission rate that does not cause congestion on link A, congestion occurs on link B, and congestion is detected by router 110c or router 110d.

  Therefore, the transfer rate calculation unit 501 calculates a transmission rate that does not exceed the threshold value in each of the link A and the link B, and notifies the impact reduction control unit 502 of the transmission rate for the link A and the transmission rate for the link B. The impact reduction control unit 502 instructs the IP layer control unit 40 to transfer data at the transmission rate for link A in link A, and to transfer data at the transmission rate for link B in link B. To instruct.

  According to this method, even if there are portions with different bandwidths in the communication link for transmitting and receiving data, the data is transferred so as not to exceed the respective bandwidths, so that serious congestion is not detected by the router 110. , Routing can be suppressed from changing.

(Second Embodiment)
The information processing apparatus according to the present embodiment equalizes the load or quality in the network when sending data to the network. The configuration of the relay device of this embodiment will be described.

  FIG. 5 is a block diagram illustrating a configuration example of the relay apparatus according to the present embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. A relay device 12 shown in FIG. 5 is connected to the network 101 instead of the relay device 10 of the communication system shown in FIG.

  As illustrated in FIG. 5, the relay device 12 includes a control unit 24 and a memory 25. The control unit 24 includes a TCP layer control unit 30, an IP layer control unit 40, and a sublayer control unit 54. Similar to the first embodiment, the memory 25 stores the same threshold as that stored in the storage unit 114 of the router 110. The relay device 12 is provided with a storage unit for storing data until data input from the outside is transferred to the outside, but the storage unit is not shown in the figure. .

  The sublayer control unit 54 includes a transfer rate calculation unit 501 and an impact homogenization control unit 542. The impact homogenization control unit 542 notifies the IP layer control unit 40 of the transmission rate calculated by the transfer rate calculation unit 501, and instructs the network 101 to divide and send data from a plurality of routes. To do.

  Next, the procedure of the information processing method by the relay device 12 will be described. FIG. 6 is a flowchart showing the procedure of the information processing method of this embodiment.

  When the sublayer control unit 54 recognizes the capacity of data that the TCP layer control unit 30 passes to the IP layer control unit 40, the sublayer control unit 54 determines whether or not the network traffic rate is equal to or higher than the threshold value by transmitting the data through the network 101. (Step 201).

  If the sublayer control unit 54 determines that the traffic rate is equal to or higher than the threshold value as a result of the determination in step 201, the sublayer control unit 54 calculates a transmission rate at which the traffic rate of the observed value does not exceed the threshold value (step 202). The IP layer control unit 40 is instructed to divide the network into a plurality of routes and send them from a plurality of routes.

  The IP layer control unit 40 divides the data received from the TCP layer control unit 30, and uses the smaller rate of the calculated rate received from the sublayer control unit 54 and the maximum rate allowed for the IP as the divided data. Are sent to the network 101 from a plurality of routes (step 203).

  On the other hand, as a result of the determination in step 201, when the sublayer control unit 54 determines that the traffic rate is less than the threshold, the sublayer control unit 54 instructs the IP layer control unit 40 to transmit data. The IP layer control unit 40 sends the data received from the TCP layer control unit 30 to the network 101 at the maximum rate allowed as IP (step 204).

  According to the present embodiment, the network 101 shown in FIG. 1 will explain, the relay device 12 divides the data, and the route between the relay device 12 and the router 110f and the route of the relay device 12 and the router 110d are respectively Send the divided data. Data transfer time is shortened by transferring data through a plurality of routes. Thereby, in the network 101, the possibility of serious congestion is reduced, and the routing can be suppressed from changing.

  When the bandwidth is different between the route between the relay device 12 and the router 110f (route A) and the route between the relay device 12 and the router 110d (route B), the relay device 12 may perform as follows. . The transfer rate calculation unit 501 calculates a transmission rate that does not exceed the bandwidth in each of route A and route B, and notifies the impact homogenization control unit 542 of the transmission rate for route A and the transmission rate for route B. The impact homogenization control unit 542 instructs the IP layer control unit 40 to transmit data at the transmission rate for route A in route A, and transmits data at the transmission rate for route B in route B. To instruct.

  In this case, even if there are routes having different bandwidths among a plurality of routes that transmit data, since data is transferred so as not to exceed the respective bandwidths, serious congestion is not detected by the router 110, and routing is not performed. It can suppress changing.

  In addition to the method described above, the relay device 12 may execute as follows in order to equalize the load or quality in the network.

  When the impact homogenization control unit 542 instructs the IP layer control unit 40 to transmit data, the impact homogenization control unit 542 instructs transmission of dummy data to the network 101. At that time, the impact homogenization control unit 542 may not notify the IP layer control unit 40 of the transmission rate calculated by the transfer rate calculation unit 501. Upon receiving an instruction from the impact homogenization control unit 542, the IP layer control unit 40 sends the data received from the TCP layer control unit 30 to the network 101 at the maximum rate allowed as IP, and dummy data at the same rate. Send to network 101. In addition, if the IP layer control unit 40 receives the transmission rate information from the impact homogenization control unit 542, the IP layer control unit 40 transmits the data and dummy data received from the TCP layer control unit 30 at the transmission rate.

  When sending a large amount of data addressed to the server 151 from the relay apparatus 12, the dummy data is sent to the network 101, so that the impact on the network due to the large amount of data is relative to that of other parts of the network. Alleviated.

  When the relay device 12 sends data to the server 151, there is a possibility that congestion due to dummy traffic will occur simultaneously in the network 101 other than the link where data is transferred from the relay device 12 to the server 151. As a result, since the load is balanced as the entire network 101, the possibility of changing the routing is reduced.

  Further, instead of generating dummy traffic, the relay device 12 may execute as follows.

  In the network 101 shown in FIG. 1, it is assumed that a communication link (referred to as link C) is established between the server 152 and the server 151. When a link D other than the link C is stretched in the network 101, the impact homogenization control unit 542 monitors the observation value of the link D, and at the timing when the observation value of the link D becomes equal to or greater than the threshold value, the link C The IP layer control unit 40 is instructed to send data via

  In this case, since data transfer is performed on the link C in synchronization with the data transfer occurring on the link D, there is a possibility that serious congestion may occur simultaneously outside the link C. This balances the load on the entire network and reduces the possibility of routing changes.

(Third embodiment)
The information processing apparatus according to the present embodiment prevents the router from executing network control when sending data to the network. The configuration of the relay device of this embodiment will be described.

  FIG. 7 is a block diagram illustrating a configuration example of the relay apparatus according to the present embodiment. FIG. 8 is a block diagram showing an example of the configuration of the network control apparatus. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. A relay device 14 shown in FIG. 7 is connected to the network 101 instead of the relay device 10 of the communication system shown in FIG.

  As illustrated in FIG. 7, the relay device 14 includes a control unit 22 and a memory 23. The control unit 22 includes a TCP layer control unit 30, an IP layer control unit 40, and a sublayer control unit 52. Similar to the first embodiment, the memory 23 stores the same threshold as that stored in the storage unit 114 of the router 110. The relay device 14 is provided with a storage unit for storing data until data input from the outside is transferred to the outside, but the storage unit is not shown in the figure. .

  The sublayer control unit 52 includes a negotiation unit 521. Before instructing the IP layer control unit 40 to send data to the network 101, the negotiation unit 521 sends threshold value insensitive information to the network control device 120 so that network control is not performed due to congestion caused by the data. To instruct the IP layer control unit 40 to do so. The threshold value insensitive information includes information on an identifier for specifying data to be transmitted, and a request that network control is not executed even if the data is detected. The identifier for specifying data is, for example, information for specifying a data transmission destination or a data transmission source, and is an identifier that is different for each apparatus.

  The IP layer control unit 40 transmits the threshold insensitivity information received from the sublayer control unit 52 to the network control device 120, and then transmits the data received from the TCP layer control unit 30 via the sublayer control unit 52 to the maximum rate allowed as IP. To the network 101.

  Next, the configuration of the network control apparatus shown in FIG. 8 will be described.

  The network control device 120 is connected to the network 101 shown in FIG. The network control device 120 instructs the routers 110a to 110f when necessary for the routing control executed by the router 110. The control target of the network control device 120 may be any one or more of routing, topology, and bandwidth allocation according to the control target of the router 110.

  As illustrated in FIG. 8, the network control device 120 includes a storage unit 122 and a network control unit 124. The storage unit 122 stores the same threshold as that stored in the storage unit 114 of the router 110. When the network control unit 124 receives the threshold insensitive information from the relay device 14, the network control unit 124 transfers the threshold insensitive information to the routers 110a to 110f.

  When the threshold value insensitive information is received from the network control device 120, the control unit 95 of the routers 110a to 110f reads the data identifier included in the threshold value insensitive information, and congestion is detected when data including the identifier is detected. However, the routing control is not executed.

  Next, the procedure of the information processing method by the relay device 14 will be described. FIG. 9 is a flowchart showing the procedure of the information processing method of this embodiment.

  When the sublayer control unit 52 recognizes the capacity of data that the TCP layer control unit 30 passes to the IP layer control unit 40, the sublayer control unit 52 determines whether or not the traffic rate of the network is equal to or higher than a threshold by transmitting the data in the network 101. (Step 301).

  If the sublayer control unit 52 determines that the traffic rate is equal to or higher than the threshold value as a result of the determination in step 301, the sublayer control unit 52 instructs the IP layer control unit 40 to transmit threshold insensitive information to the network control device 120. The IP layer control unit 40 transmits threshold insensitivity information received from the sublayer control unit 52 to the network control device 120 (step 302), and data received from the TCP layer control unit 30 via the sublayer control unit 52 is permitted as IP. To the network 101 at the maximum rate (step 303).

  On the other hand, as a result of the determination in step 301, when the sublayer control unit 52 determines that the traffic rate is less than the threshold, the sublayer control unit 52 instructs the IP layer control unit 40 to transmit data. The IP layer control unit 40 sends the data received from the TCP layer control unit 30 to the network 101 at the maximum rate allowed as IP (step 303).

  In the present embodiment, even if serious congestion occurs in the network, routing control is not performed, so that the routing can be prevented from changing.

  In the present embodiment, the routers 110a to 110f are described as performing dynamic routing control, but may be routers that perform static routing control. In this case, the network control device 120 observes the load and quality in the network 101 and instructs the router to perform routing control such as updating the routing table.

  In this embodiment, the case where the network control device 120 is provided has been described. However, when the network control device 120 is not provided, the relay device 14 is insensitive to the router 110 that performs dynamic routing control. Information may be transmitted. At this time, the transmission destination of the threshold insensitive information may be limited to the routers connected to the communication path to which the relay device 10 has a link among the routers 110a to 110f.

(Fourth embodiment)
The information processing apparatus of this embodiment is an application of the relay apparatus described in the first embodiment to a server apparatus. The configuration of the server device of this embodiment will be described. Below, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment.

  FIG. 10 is a diagram illustrating an example of a communication system including the server device of the present embodiment. As shown in FIG. 10, compared with the communication system diagram shown in FIG. 1, the router 110 g is connected instead of the relay device 10, and the server 60 of this embodiment is connected instead of the server 152. The router 110g has the same configuration as the router 110a described in FIG.

  FIG. 11 is a block diagram illustrating a configuration example of the server apparatus according to the present embodiment. The server 60 includes a storage unit 64 that stores data and a control unit 62. In addition to the data, the storage unit 64 stores the same threshold value as that stored in the storage unit 114 of the router 110. The control unit 62 includes a TCP layer control unit 30, a sublayer control unit 50, and an IP layer control unit 40.

  In addition, since these structures and operation | movement become the same as that of 1st Embodiment, detailed description is abbreviate | omitted below. According to this embodiment, the same effect as the first embodiment can be obtained.

  Moreover, although this embodiment demonstrated the case where the relay apparatus of 1st Embodiment was applied to the server apparatus, you may apply any relay apparatus of 2nd and 3rd Embodiment to a server apparatus. .

  As described above, in the data transfer methods of the first to fourth embodiments, data transfer is attempted so that the routing control does not change the routing. For example, the means suppresses the change in the QoS of the network, changes the QoS of other routes of the data transfer route, and makes it appear that there is no relative change, and does not control even if the QoS changes. To negotiate. Therefore, routing control is not executed, and routing is not changed.

  In the network 101 shown in FIG. 1, when the function of the server 152 is moved to the server 151 so that the communication delay with the information terminal 161 is reduced, the routing in the network 101 is not transferred even if a large amount of data is transferred. You can prevent it from changing. Therefore, the routing between the information terminal 161 and the server 151 maintains the state before the movement of the server function. As a result, since the communication delay between the information terminal 161 and the server 151 is smaller than that in the case of the server 152, the user can operate the information terminal 161 and work efficiently.

  On the other hand, it may be possible to suppress the influence on routing by transferring data at such a low speed as to be buried in other traffic. However, in this case, the data transfer time is increased, and the data transfer end time is prolonged. As a result, communication between the information terminal and the server that should be performed during that time becomes impossible. On the other hand, in the above-described embodiment, control is not performed even if congestion is detected in the network. Alternatively, data transfer is performed at a transmission rate capable of suppressing a change in QoS in the network and transferring data as fast as possible. Therefore, it is possible to suppress an increase in the data transfer time, and communication between the information terminal and the server is possible even during the data transfer.

  The network 101 shown in FIG. 1 is only an example for explaining the present invention, and the number and topology of the routers 110 are not limited to the configuration shown in the figure. In the above-described embodiment, the case has been described where the relay apparatuses 10, 12, and 14 are directly connected to the server 152 that is the data transmission source, but the relay devices 10, 12, and 14 are not necessarily directly connected to the server 152 that is the data transmission source. The above-described effects can be obtained if the data transfer path is provided in the middle. Further, any two or more of the first to fourth embodiments may be combined.

  (Appendix 1) An information processing apparatus connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of the load or quality of the network. A memory for storing a threshold value related to the observed value, which is used to determine whether or not the network control device executes the control, and when sending data for changing the observed value to the threshold value or more, to the network And a control unit that equalizes the load or the quality in the network.

  (Additional remark 2) The said control part is an information processing apparatus of Additional remark 1 which divides | segments the said data into several and sends each of the divided | segmented data to each of the some path | route of the said network.

  (Supplementary note 3) When the observed value is a traffic rate, and the bandwidth of each of the plurality of routes is different, the control unit corresponds to the bandwidth of each of the plurality of routes. The information processing apparatus according to appendix 2, wherein the divided data is transmitted to each path at a transmission rate not exceeding.

  (Additional remark 4) The said observation value is a traffic rate, The said control part attaches the 1st link between the destinations of the said data, The 3rd and 4th link from which the said threshold value differs in the said 1st link The information processing according to appendix 1, wherein the data is transmitted via each of the third and fourth links at a transmission rate less than a threshold of each of the third and fourth links. apparatus.

  (Supplementary Note 5) An information processing apparatus connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of the network load or quality. A memory for storing a threshold value related to the observed value used for determining whether or not the network control device executes the control; and a range in which the observed value does not exceed the threshold value when sending data to the network. An information processing apparatus comprising: a control unit that transmits the data to the network.

  (Supplementary Note 6) The observed value is a traffic rate, and the control unit establishes a first link with the destination of the data, and the second and third links having different thresholds on the first link The information according to appendix 5, wherein the data is transmitted through each of the second and third links at a transmission rate corresponding to each threshold value of the second and third links. Processing equipment.

  (Supplementary note 7) The supplementary note 5, wherein the observed value is a traffic rate, and the control unit sends the data to the network by using a value obtained by subtracting a current traffic rate in the network from the threshold value as a transmission rate. Information processing device.

  (Additional remark 8) The said threshold value is an information processing apparatus of Additional remark 5 which the said control part acquires the control algorithm regarding the said control from the said network control apparatus, and is computed from this control algorithm.

  (Supplementary Note 9) A storage unit that stores a threshold value related to an observed value of the load or quality of the network, which is used to determine whether or not to control at least one of routing, topology, and bandwidth allocation of the network, and A network control device including a control unit that performs the control based on the observation value, a memory that stores the threshold value, and data that changes the observation value to be equal to or greater than the threshold value, An information processing apparatus including an identifier for specifying data and a control unit that transmits a request to the effect that the control is not executed even when the data is detected to the network control apparatus.

  (Supplementary note 10) The communication system according to supplementary note 9, wherein the network control device is a router.

  (Additional remark 11) The communication system of Additional remark 9 whose said information processing apparatus is a relay apparatus or a server.

10, 12, 14 Relay device 20, 22, 24 Control unit 21, 23, 25 Memory 60 Server 110a to 110g Router 120 Network control device 122 Storage unit 124 Network control unit

Claims (10)

An information processing apparatus connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of a network load or quality,
A memory for storing a threshold value related to the observation value, which is used to determine whether or not the network control device executes the control;
When transmitting data that changes the observed value to the threshold value or more to the network, an identifier for specifying the data and a request that the control is not executed even if the data is detected are sent to the network control device. A control unit to transmit;
An information processing apparatus. An information processing apparatus connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of a network load or quality,
A memory for storing a threshold value related to the observation value, which is used to determine whether or not the network control device executes the control;
A control unit that equalizes the load or the quality in the network when sending data that changes the observed value to the threshold value or more to the network;
An information processing apparatus. The information processing apparatus according to claim 2,
The controller is
An information processing apparatus that divides the data into a plurality of pieces and sends each of the divided pieces of data to a plurality of routes of the network. The information processing apparatus according to claim 2,
The controller is
An information processing apparatus that, when sending the data to the network, sends dummy data for equalizing the load in the network to the network. The information processing apparatus according to claim 2,
The controller is
When a first link is established between the data destination and a second link different from the first link is established in the network, the observation value on the second link is monitored. An information processing apparatus that transmits the data via the first link at a timing at which the observed value is equal to or higher than the threshold value on the second link. An information processing apparatus connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of a network load or quality,
A memory for storing a threshold value related to the observation value, which is used to determine whether or not the network control device executes the control;
When sending data to the network, a control unit for sending the data to the network in a range where the observation value does not exceed the threshold;
An information processing apparatus. The information processing apparatus according to claim 6.
The observed value is a traffic rate;
An observation period that is an interval at which the network control apparatus acquires the observation value is stored in the memory in advance,
The controller is
An information processing apparatus that calculates a transmission rate at which the data can be transmitted to the destination of the data within the observation period, and transmits the data to the network at the start time of the observation period at the calculated transmission rate. An information processing method by an information processing apparatus connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of a network load or quality, ,
Based on a threshold related to the observed value used to determine whether or not the network control device executes the control, determine whether or not the transmission target data changes the observed value to be equal to or greater than the threshold,
When it is determined that the transmission target data changes the observation value to be equal to or greater than the threshold value, an identifier for specifying the transmission target data and a request that the control is not executed even when the data is detected are included. Send threshold insensitivity information to the network control device,
An information processing method of transmitting the transmission target data to the network after transmitting the threshold value insensitive information. An information processing method by an information processing apparatus connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of a network load or quality, ,
Based on a threshold related to the observed value used to determine whether or not the network control device executes the control, determine whether or not the transmission target data changes the observed value to be equal to or greater than the threshold,
When it is determined that the transmission target data changes the observation value to be equal to or greater than the threshold value, the load or the quality is made uniform in the network, and the transmission target data is transmitted to the network. . An information processing method by an information processing apparatus connected to a network control apparatus that controls at least one of routing, topology, and bandwidth allocation of the network based on an observation value of a network load or quality, ,
Based on a threshold related to the observed value used to determine whether or not the network control device executes the control, determine whether or not the transmission target data changes the observed value to be equal to or greater than the threshold,
An information processing method for transmitting the transmission target data to the network within a range in which the observation value does not exceed the threshold value when it is determined that the transmission target data changes the observation value to be equal to or greater than the threshold value.

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