JP3884324B2 - Communication control device and communication control method - Google Patents

Communication control device and communication control method Download PDF

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Publication number
JP3884324B2
JP3884324B2 JP2002143957A JP2002143957A JP3884324B2 JP 3884324 B2 JP3884324 B2 JP 3884324B2 JP 2002143957 A JP2002143957 A JP 2002143957A JP 2002143957 A JP2002143957 A JP 2002143957A JP 3884324 B2 JP3884324 B2 JP 3884324B2
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Japan
Prior art keywords
information
communication
flow rate
data flow
predetermined
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JP2003338838A (en
Inventor
康智 秋山
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三菱電機株式会社
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication control device and a communication control method for efficiently using a communication line whose communication speed changes dynamically.
[0002]
[Prior art]
As a conventional information relay method and apparatus, for example, there is JP-A-2001-230805. FIG. 11 shows a configuration diagram of the control unit software of the information relay apparatus of Japanese Patent Laid-Open No. 2001-230805. The invention described in Japanese Patent Application Laid-Open No. 2001-230805 monitors a network usage status and sets a route based on the network usage status for effective use of the network. In FIG. 11, the statistical information management unit 520 obtains statistical information from the statistical information collection unit, and notifies the statistical information to other programs as necessary. The route control protocol processing unit 530 registers the statistical information management unit 520 as a client that uses statistical information, and the statistical information management unit 520 performs statistical information protocol processing on the statistical information acquired from the statistical information collection unit. Request to notify unit 530. The route control protocol processing unit 530 manages a route control protocol such as OSPF (open shortest path first), and updates route information necessary for packet transfer based on statistical information.
[0003]
[Problems to be solved by the invention]
This prior art targets an existing network infrastructure in which the communication speed is statically defined, and aims to distribute traffic with respect to the communication speed of each network. The above-mentioned prior art does not consider a case where a network whose bandwidth is dynamically changed is considered. For example, when the communication speed is reduced, another route is searched, but the amount of data to be sent does not change. If there is no, there is a problem that overflow occurs.
[0004]
The present invention has been made in order to solve the above-described problems, and targets a network whose band (communication speed) fluctuates dynamically, and is an optimum route for the fluctuating band (communication speed) at that time. For the purpose of performing control, a dynamically changing band (communication speed) is constantly monitored, and based on the information, route control and flow control are performed according to it. And it aims at obtaining the communication control apparatus and communication control method which can use a line | wire effectively and safely by these things.
[0005]
[Means for Solving the Problems]
A communication control apparatus that connects a predetermined communication device via the first communication line according to the present invention and communicates predetermined information with the connected predetermined communication device has the communication speed of the first communication line. A communication network in which the data flow rate on the first communication line changes in response to a change in the communication speed, and the communication control device A network information collecting unit that monitors the state and collects the first state information, and determines a data flow rate on the first communication line based on the first state information collected by the network information collecting unit. The data flow rate determining unit and the data flow rate determined by the data flow rate determining unit are notified to the predetermined communication device, and the communication of the predetermined information with the predetermined communication device is controlled according to the data flow rate. Do Characterized in that a chromatography data flow setting unit.
[0006]
In the communication control device according to the present invention, the communication control device connects a second communication line that is a communication line different from the first communication line and has a plurality of communication paths, and connects the predetermined information. The network information collection unit monitors the state of the second communication line and collects second state information, and the communication control device further includes the data flow determination unit determined by the data flow rate determination unit. A route determination unit that selects a predetermined communication route from the plurality of communication routes based on the data flow rate on the first communication line and the second state information collected by the network information collection unit; And a path setting unit that controls communication of the predetermined information according to the predetermined communication path determined by the unit.
[0007]
In the communication control apparatus according to the present invention, the network information collection unit changes the item information indicating the contents collected as the first state information and the first state information collected corresponding to the item information. A first collection item storage unit for storing threshold information for determining whether there is any change or not, and collecting the first state information for item information stored in the first collection item storage unit; Compared with the threshold information, when the first state information is changed, the first state information is notified to the data flow rate determining unit.
[0008]
In the communication control apparatus according to the present invention, the network information collection unit changes the item information indicating the contents collected as the second state information and the second state information collected corresponding to the item information. A second collection item storage unit for storing threshold information for determining whether there is any change or not, and collecting the second state information for the item information stored in the second collection item storage unit, Compared with the threshold value information, when the second state information is changed, the route determination unit is notified of the second state information.
[0009]
In the communication control device according to the present invention, the predetermined information includes type information indicating a type of information to be communicated, and the communication control device further includes the type information of the predetermined information and the type information. Correspondingly, a communication service request storage unit that stores communication service information indicating communication service content requested by the type information is provided, and the data flow rate determination unit includes the first status information and the type information of the predetermined information. The data flow rate on the first communication line is determined based on the communication service information corresponding to.
[0010]
In the communication control device according to the present invention, the predetermined information includes type information indicating a type of information to be communicated, and the communication control device further includes the type information of the predetermined information and the type information. Correspondingly, a communication service request storage unit that stores communication service information indicating communication service content requested by the type information is provided, and the route determination unit includes a data flow rate on the first communication line and the second A predetermined communication path is selected from the plurality of communication paths based on status information and communication service information corresponding to the type information of the predetermined information.
[0011]
In a communication control method for communicating predetermined information with a predetermined communication device connected via a predetermined communication line according to the present invention, the predetermined communication line is a communication network in which a communication speed dynamically changes, A communication network in which a data flow rate on the predetermined communication line changes in response to a change in the communication speed, wherein the communication control method monitors a state of the predetermined communication line and collects state information An information collection step; a data flow rate determination step for determining a data flow rate on the predetermined communication line based on state information collected by the network information collection step; and a data flow rate determined by the data flow rate determination step. And a data flow rate setting step for notifying the predetermined communication device and controlling communication of the predetermined information with the predetermined communication device in accordance with the data flow rate. It is characterized in.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
In the embodiments described below, an example of the invention will be described assuming that the communication control device of the present invention is a device provided in a router. However, a device other than the router, such as a gateway, a relay station, or a base station, that relays call information from the transmission source to the transmission destination may be provided in another device. In addition, a mobile phone device is used as an example of the predetermined communication device, but another device may be used as long as it can connect a communication line whose communication speed changes dynamically. The first communication line is, for example, IMT2000 (international mobile telecommunications 2000), but may be a communication line in which other communication speeds dynamically change, or may be a wireless line or a wired line. Further, the second communication line is, for example, a public line network, and may be another wired line network or a wireless line as long as it can communicate with a plurality of routes from the communication source to the communication destination. The data flow rate determining unit is a flow determining unit, and the data flow rate setting unit is a flow setting unit.
[0013]
Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a router having a communication control device of the present invention and a network whose communication path is managed by the router.
In FIG. 1, 20 and 22 are mobile phone devices, 20 is a transmitting side, and 22 is a receiving side. Reference numerals 24 to 29 denote routers, which are each provided with the communication control device of the present invention. Each of the routers 24 to 29 manages a plurality of communication paths from the transmitting-side mobile phone device 20 to the receiving-side mobile phone device 22. Reference numeral 30 denotes a communication line that dynamically changes the communication speed, which is the first communication line, and is IMT2000 as described above. The communication line 30 connects the mobile phone devices 20 and 22 and any one of the routers 24 to 29, and communicates call information, content information, still image information, moving image information, and the like as predetermined information. For example, the communication line 30 has a wider communication band and a higher communication speed when the user having the cellular phone devices 20 and 22 is stopped. On the other hand, when the user having the mobile phone devices 20 and 22 is moving, the communication line has a feature that the communication band becomes narrow and the communication speed becomes slow.
FIG. 2 is a block diagram of the communication control apparatus according to Embodiment 1 of the present invention.
In FIG. 2, 1 is a path connection request management unit that receives a connection request from an application, and 2 monitors the line speed and line state of the communication line 32 and the communication line 30, and displays (first and second) state information. The network information collection unit 3 collects a route determination unit 3 for determining a route based on the connection request contents from the route connection request management unit 1 and the data from the network information collection unit 2. A flow determination unit that determines the data flow rate on the communication line 32 based on data from the collection unit 2, a route setting unit that controls communication of information through the route determined by the route determination unit 3, and 6 a flow A flow setting unit that controls communication of information according to the data flow determined by the determination unit 4, and a TCP (transmission control) in response to a request from the application TCP / UDP usage determining unit that passes data directly to IP (Internet protocol), UDP (user datagram protocol), UDP (user datagram protocol), 8 is UDP, 9 is TCP, 10 is an application (AP) layer in which a user application operates, 11 is an IP layer and 12 is a physical layer. The scope of the present invention is the functional units 1 to 7 described above, and is located between the AP layer and the IP layer.
In the configuration diagram of the invention shown in FIG. 2, TCP and UDP are taken as examples of corresponding protocols, but other protocols may be used.
[0014]
FIG. 3 is a diagram for explaining changes in the communication speed (communication band) of the communication line 30 and changes in the data flow rate.
The left side shows the maximum data flow rate when the communication speed is low (the communication band is narrow), and indicates that information for four circles per unit time can be communicated at maximum. The right side shows the maximum data flow rate when the communication speed is fast (the communication band is wide), and it is possible to communicate at maximum eight pieces of information per unit time. As can be seen from this figure, the communication speed (communication band) and the data flow rate that can be communicated per unit time are in a proportional relationship. For example, when the maximum value information is communicated in a certain band, the maximum value of the data flow rate decreases as the band becomes narrower. For this reason, information that has been communicated as before can no longer be communicated, and the buffer on the transmission side may overflow and overflow. In order to cope with this, it is necessary to adjust the data flow rate for communication in accordance with the change in the communication speed (communication band).
[0015]
The operation of adjusting the data flow rate for communication in accordance with the change in communication speed (communication band) will be described using the flow of FIG. In the first embodiment, the route selection is determined based on the number of routers through which the route is routed and the communication fee as in the prior art.
First, the route connection request management unit 1 waits for a connection request from an application (S22). When there is a connection request from the application, the optimum route is determined based on the request from the application, and the status information of the communication line 30 is obtained from the network information collecting unit 2 (S23, network information collecting step). The data flow rate at is determined (S24, data flow rate determination step). Thereafter, the data flow rate is set on the communication control device side (router side) and the mobile phone device 20 side (mobile phone device 22 side) so as to control communication on the communication line 30 according to the determined data flow rate ( S26, data flow rate setting step), and the set contents are sent to the TCP / UDP usage determining unit 7. The TCP / UDP usage determining unit 7 passes information to be communicated to the TCP 9, UDP 8, or IP layer 11 in accordance with the request content from the application (S 27).
Further, the network information collecting unit 2 confirms a change such as a change in the line communication speed of the communication line 30 during execution of the application (S28). If the change is confirmed (S28, YES), the communication line 30 is immediately detected. Is obtained (S29), and if the obtained state information has changed from the previous state information (S210, YES), the processing from S23 is repeated. When the obtained status information has not changed from the previous status information (S210, NO), the processing from S28 is repeated.
Note that the network information collection unit 2 collects the state information of the communication line 30 at regular time intervals as in S28, and if the collected state information has changed, the flow determination unit determines that the change has occurred. 4 may be notified, or the state information of the communication line 30 may be notified to the flow determination unit 4 every time the state information is collected. The latter can increase the use efficiency of the line. Further, as in S23, only the request from the application is used as a trigger to review the data flow rate, the state information of the communication line 30 is acquired from the network information collecting unit 2 to determine the data flow rate, and then communication is performed during the execution of the application. The status information on the line 30 may not be monitored.
[0016]
For example, when the router 225 is communicating with the mobile phone device 20, the state of the communication line 30 is changed from a low communication speed as shown on the left side of FIG. 3 to a high communication speed as shown on the right side of FIG. When there is a change, the network information collection unit 2 notifies the flow determination unit 4 that the line state has changed. Here, a change in communication speed is notified. The flow determination unit 4 increases the data flow rate that can be communicated per unit time from the flow rate on the left side of FIG. 3 to the flow rate on the right side in response to a change in communication speed. By increasing the data flow rate, the communication line 30 can be used effectively. Conversely, when the communication line 30 changes from a fast communication state to a slow state, control is performed so as to reduce the data flow rate that can be communicated per unit time, thus preventing information overflow and ensuring Communication can be performed.
[0017]
As described above, by constantly monitoring the state of the communication line 30 (first communication line) and setting an optimal data flow rate, it is always efficient even for lines whose communication speed changes dynamically. Use of a simple line becomes possible. In addition, in the conventional method, when the communication speed decreases on the same line, an overflow may occur on the transmission side. However, an overflow occurs by using the communication control device and the communication control method of the present invention. In addition, it is possible to guarantee the QOS of the line whose safety is guaranteed.
[0018]
Embodiment 2. FIG.
In the first embodiment, the network information collection unit 2 monitors the state of the communication line 30 and collects the state information. However, the network information collection unit 2 also monitors the state of the communication line 32 to obtain the state information (second Communication state corresponding to the change in the data flow rate based on the state information (first state information) of the communication line 30 and the state information (second state information) of the communication line 32. An example of a communication control apparatus that determines the above will be described.
[0019]
The network configuration and apparatus configuration of the communication control apparatus according to the second embodiment are the same as those in FIGS. 1 and 2 of the first embodiment.
FIG. 5 is a flowchart for explaining the operation of the communication control apparatus according to the second embodiment.
In FIG. 5, the processes of S23, S24, and S25 are different from those in FIG. 4, and the other processes are the same as those in FIG.
In S23, the state information (second state information) of the communication line 32 is acquired together with the state information (first state information) of the communication line 30 from the network information collecting unit 2. Further, the route determined in S23 is a route determined based on the number of routers to be relayed and the communication fee as in the conventional case. FIG. 6 shows the types of communication paths. “S” is a communication device on the transmission side, “D” is a communication device on the reception side, and “R” is a router (the white circle is also a router). Communication paths from “S” to “D” include paths 33, 34, and 35, and the path 35 is a communication path (path set by IP) selected when communication charges are considered as in the past. . The routes 33 and 34 are selected according to changes in the data flow rate (the route 33 is set by the proposed protocol (the communication control device of the invention) and the route 34 is set by the proposed protocol (the communication control device of the invention). Route 2).
In S <b> 24, the data flow rate is determined based on the state information of the communication line 30 acquired from the network information collection unit 2. Furthermore, a route is selected based on the determined data flow rate and the state information of the communication line 32 acquired from the network information collection unit 2. As shown in FIG. 6, it is assumed that there are routes 33 to 35. The route 35 is a route selected when considering the communication fee as described above. Here, a route suitable for the change in the data flow rate is selected in accordance with the change in the data flow rate. Since the communication line 32 is a public line network as described above, the communication speed does not change dynamically. For this reason, even if the data flow rate of the communication line 30 increases, the data flow rate of the communication line 32 cannot be increased accordingly. Therefore, the route determination unit 3 selects a relatively quiet route, for example, a route with a low collision rate of information to be communicated or a route with a high ratio (%) of the actual data rate to the physical speed of the line. Address the increase in data flow. For this reason, the route determination unit 3 selects one of the routes 33 and 34 corresponding to the change in the data flow rate, rather than the route 35 obtained from the communication fee. For example, the route determination unit 3 is based on the state information of the communication line 32 acquired from the network information collection unit 2, and the route 33 has a smaller collision rate of information to be communicated than the route 34. If the data flow rate determined by the flow determination unit 4 increases when it is determined that the route has a high rate (%) of data rate, the route 33 is selected.
In S25, the communication control device is set so that information is communicated through the route determined by the route determination unit 3.
[0020]
As described above, the communication line can be used more efficiently by selecting the route corresponding to the change in the data flow rate.
[0021]
As described above, in the second embodiment, in a communication line whose communication speed changes dynamically, such as IMT2000, the path connection request management unit that manages the path connection request from the application (AP) layer, and the IP layer Determined by the network information collection unit that monitors the communication path to be provided, the route determination unit that determines the optimal route, the flow determination unit that determines the optimal data flow rate according to the status of the route, and the route determination unit It is composed of a route setting unit for setting a route, a flow setting unit for setting a flow rate, and a TCP / UDP usage determining unit for determining whether a request from an application is passed to TCP and UDP or directly to IP, and dynamically communicates. An example of a communication control device has been described in which a line is used efficiently by guaranteeing an optimum data flow rate even when the speed changes.
[0022]
Embodiment 3 FIG.
In the third embodiment, the network information collection unit 2 monitors the state of the communication line 30 and stores the information items to be collected. A threshold is set for each item, and the line state when the set threshold is exceeded. An example of determining that has changed has been described.
[0023]
FIG. 7 shows the configuration of the network information collecting unit 2 according to the third embodiment. The network information collecting unit 2 monitors the state of the communication line 30 and collects the information items to be collected and the threshold value for each item. An item storage unit 40 (first collection item storage unit) is provided. Others are the same as FIG.
FIG. 8 is a diagram illustrating an example of information items to be collected by monitoring the state of the communication line 30 stored in the collection item storage unit 40 and threshold values set for each item.
For example, “communication speed” is a communication line when the collected status information is faster than “+ 10%” with respect to the previous communication speed and when it is slower than “−10%” with respect to the previous communication speed. It is set that there is a change in the state of 30. Further, it is set that the state of the communication line 30 has changed when the “collision (number of information collisions)” exceeds “80%” with respect to the previous state information. As for “performance” (here, “performance” is the ratio (%) of the actual data rate to the physical speed of the line), the performance smaller than “60%” with respect to the immediately preceding status information In this case, it is set that there is a change in the state of the communication line 30.
[0024]
In FIG. 4 of the first embodiment and FIG. 5 of the second embodiment, the network information collecting unit 2 flows a notification of a change when there is a change in the state information of the communication line 30 collected in S28. The determination unit 4 was notified. In the third embodiment, the network information collection unit 2 includes a collection item storage unit 40 that stores items and threshold values as shown in FIG. 8, and the status information of the communication line 30 is stored for the items having the contents shown in FIG. collect. Then, each collected state information is compared with a corresponding threshold value. As a result of the comparison, if it is determined that the state information of the communication line 30 has changed, the collected state information is notified to the flow determination unit 4. The flow determination unit 4 determines data diversion on the communication line 30 based on the state information notified from the network information collection unit 2.
The determination of whether or not there has been a change in the status information of the communication line 30 may be made when there is a change when all the items stored in the collection item storage unit 40 satisfy the threshold, It may be determined that there is a change when the threshold value of at least one of the items is satisfied.
[0025]
As described above, the network information collection unit manages the information information items to be acquired by monitoring the communication line status and the thresholds corresponding to the items in a table, so that the thresholds adapted to the mounting system and the mounting computer can be easily set. Can be set to
[0026]
Embodiment 4 FIG.
In the fourth embodiment, the network information collection unit 2 monitors the state of the communication line 32 and stores information items to be collected. In addition, a threshold value is set for each item, and the line state when the set threshold value is exceeded. An example of determining that has changed has been described.
[0027]
The items and threshold values stored in the collection item storage unit 40 described in the third embodiment are used for collecting the status information of the communication line 32. The network information collecting unit 2 collects the state information of the communication line 32 for the items having the contents described in FIG. Then, each collected state information is compared with a corresponding threshold value. As a result of the comparison, when it is determined that the state information of the communication line 32 has changed, the collected state information is notified to the route determination unit 3. The route determination unit 3 reviews the communication route on the communication line 32 based on the state information notified from the network information collection unit 2 and selects a new route. The determination as to whether or not there is a change in the status information of the communication line 32 is made in S210 of FIGS. 4 and 5, and in S210, if it is determined that there is a change in the status information of the communication line 32, the process branches to S23. In S23, the route of the communication line 32 is reviewed.
[0028]
The network information collection unit 2 has one collection item storage unit 40, and the one provided is used both for collecting the status information of the communication line 30 and for collecting the status information of the communication line 32. . However, the collection item storage unit may be provided separately from the one used for collecting the state information of the communication line 30 and the one used for collecting the state information of the communication line 32. By providing separately, it becomes possible to set another item to the item to be monitored for each line. Also, the threshold value can be set for each line.
[0029]
The network information collecting unit 2 uses the information stored in the collection item storage unit only when collecting the state information of the communication line 30 when monitoring the state of the communication line and collecting the state information. The information stored in the collection item storage unit is used only when the status information of the communication line 32 is collected, or is stored in the collection item storage unit when the status information of both the communication line 30 and the communication line 32 is collected. You can use any information you like.
[0030]
Embodiment 5 FIG.
In the fifth embodiment, the information communicated between the transmitting-side mobile phone device 20 and the receiving-side mobile phone device 22 has type information indicating the type of information to be communicated, and for each type information. An example of a communication control device that determines a data flow rate based on a required communication service will be described.
[0031]
FIG. 9 is a configuration diagram of the communication control apparatus according to the fifth embodiment.
In FIG. 9, the communication control apparatus newly includes a communication service request storage unit 41. Other components are the same as those in FIG. 2 of the first embodiment.
FIG. 10 is a diagram illustrating an example of information stored in the communication service request storage unit 41. The communication service request storage unit 41 corresponds to the type information included in the information communicated between the transmitting-side mobile phone device 20 and the receiving-side mobile phone device 22, and the communication service information requested by the information to be communicated. Remember. For example, as shown in FIG. 10, the type information included in the information communicated between the mobile phone device 20 on the transmission side and the mobile phone device 22 on the reception side is the application service information “app1”. “Performance” is set to “above 4 Mbps”, “Priority” is set to “10”, “Protocol” is set to “TCP”, and a communication service having these contents is requested.
“Performance” is the ratio (%) of the data rate that is actually flowing to the physical rate of the line. The “priority” is, for example, when there is a connection request simultaneously from an application with “9” set in “priority” and an application with “10” set in “priority”. This is set to prioritize processing such as route selection and data flow rate determination from the application whose priority is “9”. Further, even if the content set as the application name is a unique application name as shown in FIG. 10, for example, when communicating a moving image, “moving image”, when communicating a still image, “still image”, communicating content The name may be a name representing the attribute of information to be communicated, such as “content” when communicating, “mail” when communicating with a mail, and “text” when communicating with a text file. Further, for example, a name indicating a communication protocol such as “TCP” in the case of information communicated by TCP and “UDP” in the case of information communicated by UDP may be used. Since the contents set as the application name correspond to the type information included in the information to be communicated, the application name that can be set in the communication service request storage unit is unique if it is the type information included in the information actually communicated. The application name, information attribute, or protocol can be used.
[0032]
When determining the data flow rate in S24 of FIGS. 4 and 5, the flow determination unit 4 acquires the status information from the network information collection unit 2 and the type information included in the information to be communicated from the communication service request storage unit 41. The communication service information corresponding to is acquired, and the data flow rate is determined.
For example, when the communication speed of the communication line 30 increases, it is assumed that there is a connection request from an application with a priority “10” and an application with a priority “12”. In this case, the data flow rate that satisfies the “performance” is first determined for the application with the priority “10”, and then the “performance” is satisfied for the application with the priority “12”. Determine the data flow rate.
[0033]
As described above, since the communication control apparatus according to the fifth embodiment sets request items and priorities for each application, the application can be operated according to the user's intention.
[0034]
Embodiment 6 FIG.
In the sixth embodiment, information communicated between the mobile phone device 20 on the transmission side and the mobile phone device 22 on the reception side has type information indicating the type of information to be communicated, and for each type information. An example of a communication control apparatus that determines a communication path based on a required communication service will be described.
[0035]
In the sixth embodiment, the communication control apparatus includes a communication service request storage unit 41 as shown in FIG. 9 as in the fifth embodiment. The contents of the communication service request storage unit 41 are the same as those in FIG. 10 of the fifth embodiment.
When the route determination unit 3 determines the route in S22 of FIG. 4 and FIG. 5 and S25 of FIG. The communication service information corresponding to the type information included in the information communicated with the mobile phone device 22 on the side is acquired from the communication service request storage unit 41, and the route is selected.
Alternatively, the route determination unit 3 may acquire the data flow rate determined by the flow determination unit 4 in addition to the state information and communication service information of the communication line 32, and may determine the route based on them.
[0036]
As described above, since the communication control apparatus according to the sixth embodiment sets the request item and the priority for each application, the application can be operated according to the user's intention.
Note that the communication service request storage unit may be provided separately for the data flow rate determining unit and for determining the route and for determining the route.
[0037]
Embodiment 7 FIG.
In the first to sixth embodiments, the communication control apparatus includes one route determination unit, one route setting unit, one flow determination unit, and one flow setting unit. However, in order to increase the processing efficiency of the communication control device, the route determination unit, the route setting unit, the flow determination unit, and the flow setting unit are configured as one block, and a plurality of the blocks are provided in one communication control device. Thus, if each block can perform processing in parallel, the processing efficiency of the communication control device can be improved.
[0038]
【The invention's effect】
As described above, according to the present invention, the data flow rate is adjusted with respect to a communication line whose communication speed dynamically changes, so that the communication line can be used efficiently. In addition, when the communication speed becomes lower than the immediately preceding communication speed, the information transmitted on the transmission side can be communicated without overflowing, and there is an effect that it is possible to guarantee the QOS of the line whose safety is guaranteed. .
[0039]
In addition, since the route is determined in consideration of the adjusted data flow rate, there is an effect that the communication line can be used efficiently.
[0040]
In addition, since the item information to be collected as the first state information and the threshold information for determining that the first state information has changed in response to the item information are set in the first collection item storage unit, It is possible to easily set item information and threshold information adapted to the system and computer on which the communication control apparatus is mounted. For this reason, it is possible to adjust the data flow rate according to the user's intention, and as a result, there is an effect that the operation of the application according to the user's intention becomes possible.
[0041]
Since the item information to be collected as the second state information and the threshold information for determining that the second state information has changed in response to the item information are set in the second collection item storage unit, It is possible to easily set item information and threshold information adapted to the system and computer on which the communication control apparatus is mounted. For this reason, it is possible to select a route that matches the user's intention, and as a result, it is possible to operate an application that meets the user's intention.
[0042]
The communication service information is set in the communication service request storage unit in correspondence with the type information of the information to be communicated, and the data flow rate determination unit adjusts the data flow rate based on the first status information and the communication service information. To do. For this reason, it is possible to adjust the data flow rate according to the user's intention, and as a result, there is an effect that the operation of the application according to the user's intention becomes possible.
[0043]
Further, the communication service information is set in the communication service request storage unit in association with the type information included in the information to be communicated, and the route determination unit adjusts the route based on the second state information and the communication service information. For this reason, it is possible to select a route that matches the user's intention, and as a result, it is possible to operate an application that meets the user's intention.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a router provided with a communication control device of the present invention and a network in which communication paths are managed by the router.
FIG. 2 is a configuration diagram of a communication control apparatus according to Embodiment 1 of the present invention.
FIG. 3 is a diagram for explaining a change in communication speed (communication band) and a change in data flow rate of the communication line 30 according to the first embodiment of the present invention.
FIG. 4 is a flowchart showing an operation of the communication control apparatus according to the first embodiment of the present invention.
FIG. 5 is a flowchart showing the operation of the communication control apparatus according to the second embodiment of the present invention.
FIG. 6 is a diagram showing the types of communication paths according to the second embodiment of the present invention.
FIG. 7 is a diagram showing a configuration of a network information collection unit 2 according to Embodiment 3 of the present invention.
FIG. 8 is a diagram showing an example of information items to be collected by monitoring the state of the communication line 30 stored in the collection item storage unit 40 according to Embodiment 3 of the present invention, and threshold values set for each item;
FIG. 9 is a configuration diagram of a communication control apparatus according to a fifth embodiment of the present invention.
FIG. 10 is a diagram showing an example of information stored in a communication service request storage unit 41 according to Embodiment 5 of the present invention.
FIG. 11 is a configuration diagram of control unit software of an information relay apparatus according to Japanese Patent Application Laid-Open No. 2001-230805 of a conventional example.
[Explanation of symbols]
1 route connection request management unit, 2 network information collection unit, 3 route determination unit, 4 flow determination unit, 5 route setting unit, 6 flow setting unit, 7 TCP / UDP usage determination unit, 8 UDP, 9 TCP, 10 AP layer , 11 IP layer, 12 physical layer, 20, 22 mobile phone device, 24-29 router, 30, 32 communication line, 33-35 route, 40 collection item storage unit, 41 communication service request storage unit.

Claims (7)

  1. In a communication control device for connecting a predetermined communication device via a first communication line and communicating predetermined information with the connected predetermined communication device,
    The first communication line is a communication network in which a communication speed dynamically changes, and is a communication network in which a data flow rate on the first communication line changes in response to the change in the communication speed.
    The communication control device
    A network information collection unit for monitoring the state of the first communication line and collecting first state information;
    A data flow rate determining unit for determining a data flow rate on the first communication line based on the first state information collected by the network information collecting unit;
    A data flow rate setting unit for notifying the predetermined communication device of the data flow rate determined by the data flow rate determination unit and controlling communication of the predetermined information with the predetermined communication device according to the data flow rate; A communication control apparatus comprising:
  2. The communication control device communicates the predetermined information by connecting a second communication line which is a communication line different from the first communication line and has a plurality of communication paths,
    The network information collection unit monitors the state of the second communication line and collects second state information,
    The communication control device further includes:
    Based on the data flow rate on the first communication line determined by the data flow rate determination unit and the second state information collected by the network information collection unit, a predetermined communication route is selected from the plurality of communication routes. A route determination unit to select;
    The communication control apparatus according to claim 1, further comprising: a path setting unit that controls communication of the predetermined information according to the predetermined communication path determined by the path determination unit.
  3. The network information collection unit includes item information indicating the contents to be collected as the first state information, and threshold information for determining whether the first state information collected corresponding to the item information has a change or not. A first collection item storage unit that stores the first status information for the item information stored in the first collection item storage unit, and compares the first state information with the threshold value information. 3. The communication control device according to claim 1, wherein, when there is a change in the state information, the first flow state determination unit is notified of the first state information.
  4. The network information collection unit includes item information indicating contents to be collected as the second state information, and threshold information for determining whether there is a change or no change in the second state information collected in association with the item information. A second collection item storage unit that stores the second state information for the item information stored in the second collection item storage unit, and compares the second state information with the threshold value information. 4. The communication control device according to claim 1, wherein, when there is a change in the state information, the second state information is notified to the route determination unit. 5.
  5. The predetermined information includes type information indicating a type of information to be communicated,
    The communication control device further includes:
    A communication service request storage unit that stores type information of the predetermined information and communication service information indicating communication service content requested by the type information in association with the type information;
    The data flow rate determining unit determines a data flow rate on the first communication line based on the first state information and communication service information corresponding to the type information of the predetermined information. The communication control apparatus according to any one of claims 1 to 4.
  6. The predetermined information includes type information indicating a type of information to be communicated,
    The communication control device further includes:
    A communication service request storage unit that stores type information of the predetermined information and communication service information indicating communication service content requested by the type information in association with the type information;
    The route determination unit determines a predetermined amount from the plurality of communication routes based on the data flow rate on the first communication line, the second state information, and communication service information corresponding to the type information of the predetermined information. 6. The communication control apparatus according to claim 2, wherein a communication path is selected.
  7. In a communication control method for communicating predetermined information with a predetermined communication device connected via a predetermined communication line,
    The predetermined communication line is a communication network in which a communication speed dynamically changes, and a communication network in which a data flow rate on the predetermined communication line changes in response to the change in the communication speed,
    The communication control method is as follows:
    A network information collecting step of monitoring the state of the predetermined communication line and collecting state information;
    A data flow rate determining step for determining a data flow rate on the predetermined communication line based on the state information collected by the network information collecting step;
    A data flow rate setting step of notifying the predetermined communication device of the data flow rate determined by the data flow rate determination step and controlling communication of the predetermined information with the predetermined communication device according to the data flow rate; A communication control method characterized by comprising:
JP2002143957A 2002-05-20 2002-05-20 Communication control device and communication control method Expired - Fee Related JP3884324B2 (en)

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