JP2010074279A - Communication equipment, method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a processing load for performing proper communication control. <P>SOLUTION: Communication equipment 100 is provided with: a communicating part 104 for performing communication control through a network; an executing part 107 for executing an application that requests communication from the communicating part 104; a detecting part 109 for detecting state information indicating a network state to be used by the communicating part 107; a storing part 101 for associating the state information showing the network state with communication control information for performing control suitable to the network state about the communication for which the application requests to the communicating part to store them; and a control part 106 for controlling the communication for which the application requests to the communicating part 104 on the basis of the state information detected by the detecting part 109 and the communication control means associated by the storing part 101. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a communication apparatus, method, and program for performing communication according to a network.

  In recent years, with the improvement of computer technology, computers tend to become smaller. For this reason, it has become easy for a user to carry a miniaturized computer. And it is common for a user to carry a computer and use it under various circumstances. Further, the computer tends to store various programs and data used by users.

  In such a computer, various network interfaces are prepared for connection to a network according to the use situation. By using various network interfaces properly, for example, it is possible to connect to a wired network when using it in the office, and connect to a mobile phone or public wireless network when using it on the go. . When the office is wired to the network, it is conceivable to use a short message or visual communication application as an office application or a communication means in the office. When connected to a mobile phone or public wireless network on the go, it is thought that it will be used mainly for limited applications such as e-mail.

  As described above, the connection method and the program to be used tend to differ depending on the environment in which the computer is used. However, even if the computer usage method varies depending on the environment, the normal computer starts the application from the same initial state and uses the network every time regardless of the environment. For this reason, it is difficult to maintain an optimal network state according to the environment.

  In view of this, Japanese Patent Laid-Open No. 2004-228867 proposes a technique for adjusting an application protocol or transport protocol parameter in real time according to the network or computer environment to maintain an optimal network state. Thereby, even if it is a case where it uses, moving by a railroad, a motor vehicle, etc., an appropriate communication state can be maintained.

JP 2000-78232 A

  However, in the technique described in Patent Document 1, an appropriate communication state can be maintained according to the network situation, but since it is necessary to follow in real time, an arithmetic process for always deriving an optimization parameter is required. .

  For this reason, even when the network situation is similar to the past network situation, the optimization parameters derived in the past cannot be used, and the calculation processing load of the computer increases. In addition, power consumption increases as the calculation processing load on the computer increases. This is a big problem when the user uses the computer on the go.

  The present invention has been made in view of the above, and an object of the present invention is to provide a communication device, a method, and a program that perform control according to network conditions and reduce the calculation processing burden.

  In order to solve the above-described problems and achieve the object, a communication device according to the present invention includes a communication unit that performs communication control via a network, and an execution unit that executes an application that requests communication from the communication unit And a detection unit that detects status information indicating the network status used by the communication unit, status information indicating the network status, and communication that the application requests to the communication unit, and performs control suitable for the network status The application is stored in the communication unit based on the storage unit that associates and stores communication control information, the state information detected by the detection unit, and the communication control information associated in the storage unit. And a control unit that controls communication requested to the terminal.

  The communication method according to the present invention is a communication method executed by a communication device, and the communication device is configured to transmit status information indicating a network status and communication requested by the application to the communication unit. A storage unit that associates and stores communication control information that performs control suitable for the state, a communication unit that performs communication control via a network, and an execution unit that communicates with the communication unit An execution step of executing an application requesting the detection, a detection unit detecting the state information indicating a network state used by the communication unit, the state information detected by the detection step, and the storage unit Based on the associated communication control information, a control for controlling communication requested by the application to the communication unit. A method, characterized by having a.

  Further, the communication program according to the present invention corresponds to a state information indicating a network state by a computer and communication control information for performing a control suitable for the network state with respect to communication requested by the application to the communication unit. A communication step that includes a storage unit that stores information and performs communication control via a network; an execution step that executes an application that requests communication from the communication unit; and the state that indicates a network state used by the communication unit Based on the detection step for detecting information, the status information detected in the detection step, and the communication control information associated with the storage unit, the communication requested by the application to the communication unit is controlled. And causing the computer to execute control steps.

  According to the present invention, by performing communication control based on communication control information, it is possible to appropriately perform communication control based on a request from an application and to reduce the processing load for performing appropriate and appropriate communication control. Play.

  Exemplary embodiments of a communication apparatus, method, and program according to the present invention will be explained below in detail with reference to the accompanying drawings.

(First embodiment)
As illustrated in FIG. 1, the communication device 100 according to the first embodiment includes a storage unit 101, a wireless network I / F 102, a wired network I / F 103, a communication unit 104, a registration / update unit 105, and the like. A control unit 106, an execution unit 107, an environment information acquisition unit 108, and a detection unit 109. The communication device 100 may include other elements other than the configuration described above, but is omitted because it is not necessary for the description in the present embodiment. Then, communication is performed with, for example, the server 150 via the network to which the communication device 100 is connected.

  The wireless network I / F 102 is a network interface that connects to a network using wireless communication. The wireless connection method includes all methods regardless of well-known methods.

  The wired network I / F 103 is a network interface that is wired to the network. As a wired connection system, for example, any system such as 100BASE-T may be used regardless of the known system. Note that the network interface provided in the communication device 100 is not limited to the above types. Further, the number of network interfaces provided in the communication apparatus 100 is not limited to two, and may be one or three or more.

  The communication unit 104 performs data communication via a network connected using the wireless network I / F 102 or the wired network I / F 103. Data communication is used by an application executed by the execution unit 107 described later for data transmission / reception.

  The detection unit 109 detects state information indicating the state of the network used by the communication unit 104. An example of status information will be described later.

  The environment information acquisition unit 108 detects environment information indicating the application executed by the execution unit 107 and the communication device 100 itself or their surroundings in the network environment in which the communication unit 104 is communicating. The environment information includes, for example, logged-in user information, a program ID for identifying the application being executed, communication information indicating a communication destination requested by the application, and the type of data transmitted / received by the application. The data type to be shown.

  The storage unit 101 stores an application executed by the execution unit 107 and control information used by the control unit 106. As illustrated in FIG. 2, the storage unit 101 stores a normal application program 201 and control information 202 related to the application program 201 in association with each other.

  The control information 202 is information registered or updated by the registration / update unit 105 in accordance with the situation when the associated application program 201 is executed. This control information 202 enables communication control.

  The application program 201 is not changed through execution, but the control information 202 is registered and updated based on a change in network status or the like when the corresponding application program 201 is executed.

  As shown in FIG. 2, control information is stored in association with each application program for a plurality of applications. The application program stored in the storage unit 101 does not necessarily have the above-described configuration, and may be stored in a state that is not associated with the control information. As another example, the application program and the control information are associated with each other, but the control information is not registered at all, and only the application program is registered.

  The control information stored in the storage unit 101 is used to control status information indicating the status of the network, environment information indicating the status of the communication device 100 and the application, and communication performed by the application in a table generated for each application program 201. Is stored in association with the search key. That is, the storage unit 101 uses the search key to adjust state information indicating the state of the network, environment information indicating the state of the communication device 100 and the application, and communication control by the application in the detected network environment. Are stored in association with each other. As the search key, in the present embodiment, a recording time indicating a time when registration or update is performed is used. In addition, you may use the context etc. which are mentioned later.

  Note that the format of the storage unit 101 shown in FIG. 2 is shown as an example, and is not limited to a structure in which control information is associated with each application program. For example, a method may be adopted in which the application program and the control information are different files, and the format is distinguished by the extension of the file. Further, all control information for each application program may be collectively managed, and information for identifying the application program may be set as a search condition, so that the application program can be stored in a format that can be specified. Thus, it is only necessary to realize a structure in which the correspondence between the application program and the control information related to the application program can be grasped.

  In the present embodiment, as shown in FIG. 3, the control information stored in the storage unit 101 stores an information ID, a context, a recording time, and a value in association with each other.

  The information ID identifies information stored in the entry. The information ID according to the present embodiment includes, for example, the type of connection interface, the IP address assigned to the interface, the number of transmitted bytes per unit time for each communication, the number of received bytes per unit time for each communication, (the entire node ID) for identifying the number of transmitted bytes per unit time, the number of received bytes per unit time (for the entire node), TCP control information for each communication, and the like. Then, the actual value of the information identified by the information ID is held in the value. For example, the value stores a value that identifies the type of connection interface described above, an IP address assigned to the interface, and the number of transmission bytes per unit time for each communication.

  The context specifies a situation such as the communication device 100 or the network connection destination when the information identified by the information ID is generated. The recording time indicates the time when the information identified by the information ID is stored. The recording time may be the time when each piece of information is acquired.

  For example, when a search is performed by setting the context and the recording time as search conditions, the value of each information regarding the operation performed at the same recording time and the same situation can be detected. That is, the connection interface used in the same recording time and the same situation, the IP address assigned to the interface, and the number of transmission bytes per unit time can be detected.

  In the example illustrated in FIG. 3, the storage unit 101 stores four entries for three types of information. Since the entry 301 and the entry 302 hold the same information ID, the same type of information is stored, but the recording times are different. The entries 301 and 302, the entry 303, and the entry 304 have different information IDs, indicating that different types of information are stored. It can be understood that the entries 301 and 303 are acquired at the same time. Further, since the entry 301 to the entry 303 hold the same context CTX1, some of them have different recording times, but they are recorded under the same situation. Next, the context for identifying the situation will be described in detail.

  The context held in the control information of the storage unit 101 according to the present embodiment is composed of a plurality of fields. In the example of the context illustrated in FIG. 4, the program ID, user information, communication information, and data type are stored in association with each other. As described above, the context according to the present embodiment includes user information logged in the communication device 100, an application program being executed, network conditions such as communication information (for example, transmission destination, protocol, and port number), It is assumed that the environment information of the communication device 100 is included. By setting these as contexts, it is possible to specify control information used for control in the same environment.

  The application ID is an ID for identifying an application program. The user information is information for identifying a user who uses the application program. The communication information is various communication parameters set for the application program to communicate. The data type is the type of data used by the application program for communication.

  Further, as communication information included in the context, a combination including a protocol number, an IP address, and a port number is held as each communication parameter set for communication with the application program.

  In the context example shown in FIG. 4, two entries (entry 401 and entry 402) are registered. The entry 401 and the entry 402 are configured so that a single user (a user identified by userA) communicates with a single server by using a single application program (Web browser), so that a plurality of types of data ( You can see that HTML and MPEG video are being sent and received.

  As described above, in the entry according to the present embodiment, if any one of the four fields has a different value, it is registered as another entry. In the present embodiment, detailed information is embedded by subdividing the context as described above. However, instead of embedding detailed information in the context in this way, an independent table that holds the detailed information of the context is generated, and the correspondence table that associates the entry of the independent table with the entry of the control information table You may manage.

  In addition, when each entry is generated using the context shown in FIG. 4, since quite detailed information is set for each entry, the current situation and It is also possible that there are few matching entries. That is, detailed information can be set as an entry, but depending on the situation, it may not be necessary to set detailed information so far. Therefore, in the present embodiment, information that does not need to be set is handled by defining it as indefinite. As a result, several elements can be defined as a single context. In the example shown in FIG. 5, the context is generated by specifying only the protocol and the port number of the communication partner as the context communication information.

  In the example illustrated in FIG. 5, a context that includes communication that is transmitted from the TCP port 80 and is directed to the communication apparatus 100 is illustrated. By collecting communication information in this way, the number of registered entries can be reduced, and extraction of entries that match the current situation is facilitated.

  Returning to FIG. 1, the control unit 106 associates the state information indicating the state of the network detected by the detection unit 109, the environment information acquired by the environment information acquisition unit 108, and the control information of the storage unit 101. Communication requested by the application to the communication unit 104 is controlled using the communication control information.

  In addition, the control unit 106 uses the network status detected by the detection unit 109 and the environment information acquired by the environment information acquisition unit 108 and the control information of the storage unit 101 before the execution unit 107 executes the application. Based on the associated communication control information, an initial value for communication control requested by the application to the communication unit 104 is set.

  In addition, after controlling the application using the communication control information, the control unit 106 further responds to a change in the network state detected by the detection unit 109 so that the execution unit 107 becomes appropriate for the state. Control applications running on. At this time, if there is no appropriate communication control information, the control unit 106 performs an operation on the detected status information and the acquired environment information, so that it is suitable for the network status and the environment where the communication device 100 is placed. The communication control information is calculated, and the application is controlled with the calculated communication control information. Any appropriate method for calculating communication control information may be used regardless of known methods.

  The execution unit 107 executes various applications on the communication device 100. Applications to be executed include applications that use information communicated by the communication unit 104 and applications that do not use the information.

  The registration / update unit 105 receives the status information indicating the network status detected by the detection unit 109, the environment information acquired by the environment information acquisition unit 108, and the communication control information indicating the control performed by the control unit 106, as described above. As described above, it is registered and updated in the storage unit 101 in association with each other.

  The configuration illustrated in FIG. 1 is an example, and for example, there may be a plurality of network interfaces or a plurality of execution units 107. You may equip the sensor for exclusive use according to the condition which the detection part 109 makes monitoring object.

  Next, the execution procedure of the application program of the communication apparatus 100 according to the present embodiment will be described with reference to FIG. In the sequence diagram shown in FIG. 6, the communication apparatus 100 starts when the user starts the application program. In the processing procedure shown in FIG. 6, it is assumed that the communication apparatus 100 is already connected to the network.

  First, the control unit 106 instructs the storage unit 101 to load the application when the user instructs activation of the application via a user interface (not shown) (step S601).

  As a result, the application program stored in the storage unit 101 is loaded into the work area of the execution unit 107 (step S602). Then, the application program stored in the work area waits until an execution instruction is given.

  Next, following the loading of the application program, the control unit 106 acquires environment information via the environment information acquisition unit 108 (step S603).

  Thereafter, the control unit 106 acquires the state information detected by the detection unit 109 (step S604).

  The environment information and the state information acquired in step S603 and step S604 may be acquired by limiting to the same type of information as the information associated with the communication control information used for communication control of the application program to be executed. General information may be acquired. As described above, the environment information and the state information to be acquired may be information necessary for the control unit 106 to perform the initial value derivation process.

  After acquiring the environment information and the state information indicating the current situation, the control unit 106 uses the information as a search condition, and from the control information associated with the application to be executed and the storage unit 101, A search for an entry of communication control information used in a situation similar to the situation is instructed (step S605).

  And the control part 106 acquires the entry of the communication control information suitable for control of the application to perform as a search result from the memory | storage part 101 (step S606). If there is no entry for communication control information that matches the search condition, this is notified to the control unit 106 (the processing in this case is omitted in FIG. 6).

  For example, when the acquired environment information indicates that the network A is connected, the optimum parameters used for controlling the application when the network A was connected once are acquired. Examples of this parameter include a TCP window size suitable for an application to be executed. This makes it possible to execute an application according to the network status.

  The acquired control information entry is expanded in the work area of the control unit 106. The work area of the control unit 106 and the work area of the execution unit 107 described above may be provided on a main memory (RAM) (not shown) included in the communication apparatus 100.

  Next, the control unit 106 obtains all communication control information entries necessary for controlling the application, and then derives an initial value for controlling the application (step S607).

  That is, when past state information and environment information coincides with current state information and environment information, an optimal parameter used for application control in the past may be set as an initial value. In addition, when the past state information and environment information are different from the current state information and environment information, the optimum parameters for this time are determined based on these values and the optimum parameters used for application control in the past. calculate.

  Then, when the derivation of the initial value is completed, the control unit 106 sets the initial value for the execution unit 107 (step S608). Thereafter, the control unit 106 instructs the execution unit 107 to execute the application using the set initial value (step S609). Then, the execution unit 107 executes the application program stored in the work area (step S610).

  The processing procedure described above is processing until the application program is executed in the communication apparatus 100 according to the present embodiment. As a result, the application program can be executed using the optimum communication control information without calculating the communication control information according to the situation of the network or the communication device 100.

  Next, a control procedure performed while the application program is being executed in the communication apparatus 100 according to the present embodiment will be described with reference to FIG.

  First, while the application program is being executed, the environment information acquisition unit 108 acquires environment information indicating each configuration of the communication device 100 such as the execution unit 107 and the periphery (step S701). Examples of environment information include processor usage and memory usage required by the application.

  Note that the processor usage refers to an allocation time of a processor installed in the communication apparatus 100 and managed by an OS (not shown) to an application program, and a processor application measured using a counter realized by hardware. Use amount derived from time allocated to the program.

  The detection unit 109 also detects, as state information, the operation state of communication performed via the wireless network I / F 102 or the wired network I / F 103 while the application program is being executed (step S702). ). Examples of status information include the network interface used and the amount of transmission / reception per unit time.

  The environment information and state information acquired in steps S701 and S702 are parameters included in the control information entry acquired in step S606 of FIG. 6 and parameters necessary for derivation thereof. In the present embodiment, specific parameters to be acquired are parameters indicated by detailed information constituting each field and context of the control information described above. The parameters are not limited to the names described above, but depend on the algorithm used for the initial value derivation step, the algorithm used for parameter adjustment, and the algorithm used for statistic value derivation.

  The environment information acquired by the environment information acquisition unit 108 is notified to the control unit 106 (step S703), and the state information detected by the detection unit 109 is also notified to the control unit 106 (step S703). S704). The notification interval needs to be set to an appropriate value according to the capability of the communication apparatus 100 and the like, and will not be described because it depends on the implementation. In addition, which of the information exchange between the control unit 106 and the detection unit 109 or the environment information acquisition unit 108 is mainly performed is an implementation-dependent matter.

  Further, the control unit 106 acquires information necessary for deriving the statistical value from the storage unit 101 (step S705). That is, state information detected in the past and environmental information are acquired.

  Then, based on the notified environment information and state information and information read from the storage unit 101, the control unit 106 derives a statistical value for each parameter indicated by the environment information and the state information (step S706). That is, a statistical value is derived from the state information and environment information newly detected this time, and the state information and environment information detected in the past. In the present embodiment, the statistical value is calculated, but the processing of steps S705 and S706 may be omitted, and the parameter may be derived using newly detected state information and environment information.

  Further, when deriving statistical values, in the communication control information (step S606 in FIG. 6) loaded in the past when the application program is stored, stored in the storage unit 101, or in this processing procedure repeatedly performed The statistical value derived in step S706 in the past may be used. In addition, about the calculation method for derivation | leading-out of each parameter, since all methods may be used regardless of well-known, description is abbreviate | omitted.

  Thereafter, the control unit 106 derives communication control information for controlling communication of the running application program using the newly detected state information and environment information, and further, the calculated state information and environment information statistics. (Step S707). This derivation procedure is almost the same as step S607 in FIG. 6, but weighting using a statistical value or the like can be performed when the initial value is derived.

  Then, the control unit 106 instructs the registration / update unit 105 to register a statistical value for each parameter indicated by the environment information and the state information, and the derived communication control information (step S708). In response to this instruction, the registration / update unit 105 clarifies the correspondence between the statistical values of the environment information and the state information, and the derived communication control information, and registers and updates the control information in the storage unit 101 (step S709). At this time, the storage policy such as whether to update the information already stored, whether to add new information, or whether to delete old information depends on the capacity of the storage unit 101 and the required prediction accuracy. Dependent.

  Thereafter, the control unit 106 sets the derived communication control information and controls the communication requested by the application program being executed (step S710).

  The operation performed by the communication apparatus 100 while the application program is operating on the execution unit 107 has been described with the above processing procedure.

  Next, the operation when the communication apparatus 100 ends the application program will be described. In the communication apparatus 100, when the application program ends, the communication control information used for controlling the application executed by the execution unit 107 is recorded in the storage unit 101 in the same manner as during operation. At this time, depending on parameters included in the communication control information, processing such as calculating characteristic values for the entire period during which the application program has been operating may be performed. For example, the minimum / average / maximum packet size, average throughput, average burst rate, etc. can be calculated over the entire period.

  The above is a series of flow from the start to the end of the application program in the communication apparatus 100.

  Next, the initial value derivation process in the communication apparatus 100 will be described in detail. As shown in the processing procedure of FIG. 6, the initial value is derived from the control information stored in the storage unit 101, the network status information detected by the detection unit 109, the configuration of the communication device 100, and the surrounding environment information. Based on. First, an example of control information stored in the storage unit 101 and state information detected by the detection unit 109 will be described.

First, control information stored in the storage unit 101 is shown below.
1) Types of network interface for each application / communication partner / data 2) Local node IP address and subnet mask for each application / communication partner / data 3) Average transmission throughput for each application / communication partner / data 4) Application / communication partner / Average reception throughput for each data 5) TCP control information for each application / communication partner / data

  The TCP control information includes a congestion control window size (cwnd), a reception window size (rwin), a TCP congestion control algorithm, and a threshold value (ssthresh) of the control algorithm. This makes it possible to control the application program.

In this embodiment, six types of information “a” to “f” are defined as information IDs. The information assigned to “a” to “f” is shown below.
a) Network interface b) Local node IP address c) Local node subnet mask d) Average transmission throughput e) Average reception throughput f) TCP congestion control information

  Further, the description of the context is omitted as the format shown in FIG. Furthermore, as environment information acquired by the environment information acquisition unit 108, a program ID for identifying a program to be executed, a user ID of a logged-in user, a data type of data used by an application program, a protocol name, The communication information included in the context such as the port number, the amount of processor usage required by the application program, the amount of memory usage, etc., will be omitted below for the sake of easy understanding.

  FIG. 8 shows control information associated with the application program A (Web Browser) in the storage unit 101. In the control information shown in FIG. 8, three types of contexts CTX1, CTX2, and CTX3 are set.

  These three types of context hold detailed information shown in FIG. That is, only the program ID and user information are set in CTX1. In CTX2, a program ID, user information, and communication information are set. In CTX3, a program ID, user information, and communication information are set, but the communication information is different from the communication information of CTX2. Note that data types are not recorded for all contexts. In the present embodiment, the detailed information of these contexts is set from the environment information acquired by the environment information acquisition unit 108. Note that this context is an example, and other forms of context may be used.

  Considering the above description of the context, only the program ID and user information are set in the context of the information IDs 'a' to 'c' shown in FIG. The contexts of the information IDs “d” and “e” are set together with the program ID, user information, and communication information.

  The information shown in FIGS. 8 and 9 is stored in the storage unit 101 in association with the application program A (Web Browser) as shown in FIG.

  It is assumed that the communication apparatus 100 is connected to a wireless network among a wireless network and a wired network.

On the other hand, the detection unit 109 detects the next state information from the communication unit 104.
A) Type of connection interface B) IP address and subnet mask assigned to the interface C) Number of transmitted bytes per unit time for each communication D) Number of received bytes per unit time for each communication E) (For the entire node) Number of bytes sent per hour F) Number of bytes received per unit time (of the entire node)

  Note that the detection unit 109 may detect TCP control information for each actual communication after being derived by the control unit 106 and set in the application program.

  Note that the detection unit 109 may detect information related to the network among the detailed information constituting the context, such as the protocol, IP address, and port number used for specifying communication instead of the environment information acquisition unit 108. good.

  When the storage unit 101 stores the control information described above and the detection unit 109 detects the state information described above, the initial value derivation process will be described again with reference to FIG. In the communication apparatus 100, it is assumed that the user has instructed activation of the Web browser.

  In this case, the control unit 106 instructs to load the execution code of the Web browser (step S601). As a result, the Web browser stored in the storage unit 101 is loaded into the work area of the execution unit 107 (step S602).

  Next, the control unit 106 acquires environment information acquired by the environment information acquisition unit 108 (step S603). Examples of environment information to be acquired include a program ID of a running application program set as a context, user information, communication information (protocol, destination port number, etc.), and data type.

  Subsequently, the control unit 106 acquires the state information detected by the detection unit 109 (step S604).

  As status information, A) a type of connection interface, a wireless LAN interface, B) an IP address assigned to the interface, IP2 ′ and MASK2 as a subnet mask, and C) a transmission byte count per unit time for each communication , 0 bytes, D) 0 bytes as the number of received bytes per unit time for each communication, E) 0 bytes as the number of transmitted bytes per unit time (for the entire node), F) units (for the entire node) The number of received bytes per time is 0 bytes. IP2 ′ represents a change in the host address portion from IP2.

  Thereafter, the control unit 106 acquires an entry of communication control information suitable for controlling the application to be executed as a search result from the storage unit 101 (step S606), but this acquisition method depends on the algorithm to be implemented. In the algorithm according to the present embodiment, an entry having a match / mismatch / similarity to the network status information is detected from the entries stored in the storage unit 101, and then an entry associated with the entry is detected. Communication control information for actually controlling the Web browser is derived based on the communication control information (communication parameters) and the match / mismatch / similarity of the state information described above. In the present embodiment, first, a network interface and a subnet are used as detected entries.

  That is, the control unit 106 according to the present embodiment uses the state information detected by the detection unit 109 to determine that the type of the connection interface is a wireless LAN interface, so that the information ID is “a” (network) in the storage unit 101. In the interface), an entry in which “wireless IF” is stored as a value is detected. At this time, a context based on the environment information acquired by the environment information acquisition unit 108 may be set as a condition.

  In the present embodiment, the control unit 106 can acquire the entry 801 from the control information shown in FIG. In the present embodiment, the control unit 106 further needs information on the IP address and the subnet mask in order to determine the match / mismatch / similarity of the state information.

  For this reason, the control unit 106 uses the context and recording time included in the entry 801 as search conditions, and from the storage unit 101, the entry with the information ID “b” (own node IP address) and the information ID And 'c' (own node subnet mask).

  Since the context of the entry 801 shown in FIG. 8 is CTX1 and the recording time is T2, the control unit 106 determines that “information ID = b, context = CTX1, recording time = T2”, “information ID = c, context = An entry matching the condition of “CTX1, recording time = T2” is acquired. As a result, entry 802 and entry 803 can be acquired.

  In this way, the control unit 106 searches the storage unit 101 using “context = CTX1, recording time = T2” as a search condition, thereby obtaining past network state information that matches the current network state information. You can get it.

  That is, the control unit 106 acquires the network interface type: wireless IF, own node IP address: IP2 ′, own node subnet mask: MASK2, and derived subnet: IP2 ′ / MASK2 = NET2 as current network state information. is doing.

  Then, the control unit 106 uses the network interface type: wireless I / F, own node IP address: IP2, own node subnet mask: MASK2, and derived subnet: IP2 / MASK2 = NET2 as the detected past network status information. Is getting.

  Based on these pieces of information, the control unit 106 determines that the current network state information matches the detected past network state information. At this point, the information is different and the control unit 106 does not perform the subsequent processing when it determines that they do not match, and derives the value defined by the OS or protocol specification as an initial value in S607. . Alternatively, the reacquisition of the entry may be attempted by paying attention to the similarity between the current network state information and the detected past network state information. For example, in the detection process performed by the control unit 106 described above, the search may be performed using only the context without including the record information in the search condition.

  When the control unit 106 determines that the state information matches, the control unit 106 acquires another entry from the storage unit 101 using the recording time T2 of the past state information as a search condition. Entries 804, 805, 806 and 807 can be acquired from the storage unit 101 shown in FIG.

  As a result, the control unit 106 performs TCP communication using the Web browser from the context of each entry, the average transmission throughput from the entry 804 is 100 kbps, and the average reception throughput from the entry 805 is 700 kbps. From the entries 806 and 807, it can be recognized that the parameters of TCP are PARAM3 and PARAM4.

  Among these entries, TCP parameters PARAM3 and PARAM4 correspond to communication control information for controlling the Web browser.

  Then, the control unit 106 confirms the match / mismatch / similarity between the context included in the acquired entry and the current network state information. Since “Web Browser” is registered as an application in the context of each entry, the current state information matches the application. The other various entries are assumed to make the same determination, and the description is omitted. As a determination result, it is assumed that it is determined that each entry includes information that matches the current state information.

  At this point, if the control unit 106 determines that the current state information does not match and is not an appropriate entry, the subsequent processing is not performed, and the value defined by the OS or protocol specification in S607 is used as the initial value. Derived as Alternatively, the entry value obtained after the similarity determination may be used. For example, consider a case where the application matches in the Web browser but the port number of the communication partner does not match. In this case, it can be considered that there is similarity from the viewpoint of “communication within a range in which the Web browser can be used”. According to this determination, the process using the acquired entry may be continued. As criteria for determining similarity, if the application matches, the user information matches, the communication information part matches, the data types match, and some combination of these, etc. Good. Note that which combination should be used as a determination condition in what priority order is a design matter and will not be described.

  After determining that the entry is appropriate, the control unit 106 determines whether the communication control information included in the entry acquired from the storage unit 101 can be reproduced in the current network environment. Specifically, the control unit 106 starts up based on the network bandwidth used by other applications currently being executed and the network bandwidth previously used by the Web browser acquired from the storage unit 101. It is determined whether the same network bandwidth as in the past can be provided to the existing Web browser. Since the wireless network interface is used this time, it is necessary to consider the effective bandwidth of the wireless interface.

  If the bandwidth used in the past exceeds the bandwidth that can be currently provided to the Web browser, the control unit 106 determines that the acquired TCP parameter (communication control information) cannot be used as it is. In this case, the control unit 106 adjusts the values included in the past TCP control information PARM3 and PARM4 to be small so that the effective speed of the interface is not exceeded (for example, the window size is halved or three-quarters). The initial value is derived (step S607). Note that the adjusted values are PARM3 'and PARM4'.

  Then, the control unit 106 sets the adjusted values (PARM3 ′, PARM4 ′) as the initial values for the execution unit 107 (step S608). Thereafter, the execution unit 107 executes the Web browser (step S609).

  As described above, in the processing procedure illustrated in FIG. 6, an example of the initial value derivation procedure when the Web browser is executed has been shown.

  Note that the above-described procedure for deriving communication control information (for example, TCP control parameters) is not limited to the communication start time, but at the timing when the network interface of the communication device 100 is changed or the network environment of the communication device 100 changes. May be executed. For example, in the communication device 100, when switching from a wireless interface to a wired interface occurs, communication control information can be derived again using an entry when the wired interface is used (for example, an entry recorded at the recording time T1). .

  In the above-described example, the TCP parameter is described as the communication control information, but other parameters may be used. For example, if the application is a video conference, the resolution and bit rate of the video image may be derived as the communication control information (if the expected bandwidth increases, the resolution and bit rate will be reduced). It is done.

  In addition, the detection unit 109 detects the appearance frequency for each unit size with respect to the transmission / reception packet size of the application program, and records the detected appearance frequency in the storage unit 101 as communication control information. It is also conceivable to set a scheduling interval for the execution unit 107 in order to realize an appropriate transmission / reception interval based on the appearance frequency acquired as control information. Further, a threshold value for selectively using a CPU and an external packet processing engine may be derived as communication control information, or a QOS parameter may be derived as communication control information.

  In addition, as an example of the processing procedure in which the control unit 106 derives the initial value from the communication control information, an example has been described in which the value stored as the communication control information in the storage unit 101 is halved or ¾. However, the derivation procedure is not limited to this, and more analytical adjustment may be performed.

  For example, a typical wireless network model may be built in and processing such as calculating the throughput estimated from the radio wave condition and the application may be performed. However, if a large amount of electric power is consumed by these processes, it will fall to the end, and it is desirable to keep it in a simple model.

  Next, a procedure for deriving statistical values in the communication apparatus 100 will be described. In the present embodiment, in order to store an appropriate entry in the storage unit 101, in the communication apparatus 100, the registration / update unit 105 sequentially updates based on the state information detected by the detection unit 109. The information to be sequentially updated may be communication control information for controlling the application program of the execution unit 107. However, in the example shown below, a case where the state information stored in the storage unit 101 is updated will be described.

  First, state information for which statistical value derivation is not performed will be described. When the state information detected by the detection unit 109 is to be stored as it is, the registration / update unit 105 registers and updates the storage unit 101 without performing special processing such as processing on the detected state information. The state information that is not subjected to special processing includes, for example, a network interface, an IP address and subnet mask assigned to the interface, the number of transmitted / received packets, a queue size, and a processor usage amount. These pieces of information can be stored without performing any calculation with the past information.

  On the other hand, there is state information that requires some processing. Furthermore, there is state information that needs some calculation between the state information detected by the detection unit 109 and the past state information already stored in the storage unit 101. About these status information, after acquiring the status information memorize | stored in the memory | storage part 101, the control part 106 performs an arithmetic process between the acquired past status information and the detected status information, and a statistical value is obtained. After the derivation, the registration / update unit 105 registers and updates the statistical values derived from the storage unit 101.

  For example, there is the number of transmitted / received packets as the state information that requires derivation of statistical values. In this case, the control unit 106 derives an average number of transmitted / received packets, a burst rate, and the like for the detected transmitted / received packets in consideration of time elements.

  If the number of transmitted / received bytes is recorded in the storage unit 101, the control unit 106 can calculate an average transmission / reception throughput, a minimum throughput, a maximum throughput, and the like.

  In calculating these values, the control unit 106 may use past monitoring values and statistical values stored in the storage unit 101. (Step S705 in FIG. 7). For example, when deriving the throughput, the control unit 106 reads the number of transmitted / received bytes stored immediately before from the storage unit 101, obtains a difference from the counter value, and derives the throughput. If the past average transmission / reception throughput is stored in the storage unit 101, the average transmission / reception throughput is updated using the value and the elapsed time from the start of communication.

  The type of statistical value that the control unit 106 derives depends on the application program that is actually operated. For example, in the case of a real-time application that is sensitive to delay, the control unit 106 derives an average delay and a burst rate, and adjusting these values improves communication quality. Therefore, it is meaningful to derive those values. is there.

  However, it is considered that it is important to adjust the throughput sensitively to a temporary drop rather than an average value, and statistical throughput information is considered to have little merit. On the other hand, if it is an application that performs bulk transfer, it is considered preferable to maintain a high throughput continuously, and it is considered that there is an advantage of deriving an average transmission / reception throughput. In this way, the control unit 106 derives an appropriate statistical value as necessary.

  In the communication apparatus 100 according to the present embodiment, the usage environment of the communication apparatus 100 and the application is acquired, the connection status of the network is detected, and the information is associated with communication control information and an application for controlling communication. Since it is stored in the storage unit 101, when a similar situation is encountered, it is possible to derive an initial value based on communication control information set in the past and set the initial value.

  Thereby, when using the application program, the communication device 100 derives communication control information (for example, an initial value) appropriate for the current network environment without performing special processing, and the application program is used with the communication control information. Therefore, it is possible to maintain a communication state according to the situation. Furthermore, in the communication apparatus 100, since special calculation processing is not required to maintain an appropriate communication state, it is possible to reduce the calculation processing load and power consumption.

  Conventionally, after setting an initial value not related to the communication environment, control according to the communication environment is performed to derive an appropriate parameter. On the other hand, in the communication apparatus 100, as described above, the parameter set as the optimum value in the past is set as the initial value, so that it can reach the appropriate parameter faster. Furthermore, since it is possible to reach an appropriate parameter immediately, it is possible to reduce the processing calculation load and suppress power consumption by the processing calculation.

(Second Embodiment)
In the second embodiment, an example in which one application program handles a plurality of types of data will be described. Note that the communication device according to the second embodiment has the same configuration as that of the communication device 100 according to the first embodiment, and a description thereof will be omitted.

  In the communication apparatus 100 according to the second embodiment, an example in which a Web browser is used as an application program will be described as in the first embodiment. In this example, the Web browser simultaneously uses a plurality of types of data obtained through communication by the communication unit 104.

  FIG. 10 shows an operation screen example of the application program assumed in the present embodiment. A window 1001 indicates the window of the entire Web browser. The first area 1002 is an area for displaying moving image data received in real time in the window 1001. The second area 1003 is an area for displaying non-moving information (for example, text data or a still image) in the window 1001.

  The display of each area described above is realized by acquiring a plurality of types of data obtained by communication of the communication unit 104. Of the multiple types of data received, video data communication requires video data to be displayed in real time. Therefore, communication is performed so that a stable bandwidth is ensured with low delay and data is accurately acquired. There is a need. Of the plurality of types of data, text data and still image data may be received in a time zone in which the bandwidth is free.

  For this reason, even in communication executed by the same application program, it is necessary to control communication for each type of data. Therefore, in the communication device 100 according to the present embodiment, communication control information used for control is made different depending on the type of data even in the same application program. Specifically, the context is changed according to the data type, and the entry is stored in the storage unit 101 as another entry.

  In the context shown in FIG. 11, “video / mpeg” is registered as the data type in the entry 1101, and “text / html” is registered as the data type in the entry 1102. This makes it possible to clearly distinguish the control of communication performed by the application program executed by the execution unit 107 according to the data type. In other words, in order to obtain communication control information used for communication control of moving image data used in the first area 1002, the context of the entry 1101 is used and used for communication control of the HTML file used in the second area 1003. To obtain the communication control information, the context of the entry 1102 is used. In addition, about the process at the time of acquiring communication control information, description is abbreviate | omitted as it is the same as that of 1st Embodiment.

  In this way, as in the first embodiment, when the user instructs activation of the Web browser, the initial value based on the communication control information is set for the communication control for each data type received by the Web browser. Is set.

  However, in many cases, the type of data to be received is unknown until the Web browser executed in the communication apparatus 100 actually accesses the Web page. For example, the Web page shown in the example of FIG. 12 is also described in a single HTML as a Web page representing the whole, and the inside of the Web page is divided into areas of moving image data and text data. .

  Even in such a case, the communication device 100 according to the present embodiment can appropriately identify and control communication for each data type. First, it is assumed that the storage unit 101 stores the control information shown in FIG.

  In the status information shown in FIG. 12, the information ID is shown below. Note that the context CTX1 illustrated in FIG. 12 corresponds to the entry 1101 illustrated in FIG. 11, and the context CTX2 corresponds to the entry 1102 illustrated in FIG.

The information IDs “e” to “h” shown in FIG. 12 are defined as the following information.
e) Average reception throughput f) TCP congestion control information g) Reception side average delay h) Reception side jitter

  By the way, also in the communication apparatus 100 according to the present embodiment, as in the first embodiment, when the application program is started, the communication control information according to the network environment is acquired and the initial value is derived. The initial value is set for the execution unit 107. However, immediately after starting the Web browser, since no Web page is accessed, the data type cannot be specified and is stored in the storage unit 101. The entry cannot be acquired and the initial value cannot be set.

  Two methods are conceivable as means for dealing with such cases. First, as a first method, there is a method of acquiring an entry related to an application program in advance regardless of the type of data. The second method is a method of acquiring each entry in which the type of acquired data is set as a context, triggered by the occurrence of an event such as data acquisition by the application program.

  Assume that the implementation is such that an entry is acquired in advance using the first technique, and a derived initial value is set based on the acquired entry. In this case, the control unit 106 derives the initial value and sets the derived initial value based on the entries of all the data types associated with the application program to be executed. The control unit 106 according to the present embodiment performs derivation of an initial value and setting of the derived initial value based on communication control information of an entry having a context in which an HTML file is registered as a data type, and MPEG video Is derived based on the communication control information of the entry having the context registered as the data type, and the derived initial value is set. The specific processing procedure is the same as that in the first embodiment, and the description thereof is omitted.

  Accordingly, it is possible to cope with a case where communication of a plurality of types of data is executed by one application program as shown in FIG. Further, the present invention is not limited to a plurality of types of communication based on a plurality of types of data, and when a plurality of communications are required for the same type of data, different initial values may be set for each communication. As described above, in the communication device 100 according to the present embodiment, when a plurality of communications having different properties are performed, control is performed by setting parameters (for example, initial values) based on different communication control information for each communication. be able to.

  It is also assumed that the second method is used to implement a method for acquiring each entry in which the type of acquired data is set as a context, triggered by the occurrence of an event such as data acquisition by the application program. To do. In this case, when the communication unit 104 receives the HTML file and generates the next communication request, it is determined whether or not an entry having a context corresponding to the received data is stored in the storage unit 101 and stored. If it is determined that the entry is present, the entry may be acquired, and the communication setting may be performed based on the communication control information included in the entry.

  In the communication apparatus 100 according to the above-described embodiment, when the application program handles various data, the status information and communication control information for each piece of data is stored in the storage unit 101, so that one application program can be used. When various communications are performed, an initial value can be appropriately derived for each communication and communication control can be performed. Thereby, an appropriate parameter can be quickly reached in each communication control.

  In the communication apparatus 100 according to the present embodiment, in addition to the effects shown in the first embodiment, even if one application is used for a plurality of uses, parameters are appropriately set for each use. be able to.

(Third embodiment)
In the third embodiment, a case where a plurality of users use the communication device 100 will be described.

  As shown in FIG. 4, the context stored in the storage unit 101 includes user information. When performing communication control, by acquiring an entry including user information that matches the logged-in user, communication control suitable for each user can be performed.

  Thereby, when one communication apparatus 100 is shared by a plurality of users, appropriate control can be performed for each logged-in user. That is, it can be considered as an application program that is activated even when the same communication apparatus 100 is used by a plurality of users. It is also conceivable to start a plurality of different application programs depending on the user. In this case, even for the same application program, it is preferable to change the bandwidth allocated for each user. As described above, when one application program is used by a plurality of users, appropriate control can be performed for each user.

  Further, the communication device 100 can be applied to each device constituting a network system as shown in FIG.

  The network system shown in FIG. 13 includes a storage 1301, a server 1302, terminals 1303 to 1305, and a network 1306 that connects them. A program for realizing the communication apparatus 100 is stored in the storage 1301.

  Then, when the server 1302 or the terminals 1303 to 1305 execute the program stored in the storage 1301 via the network 1306, each of the above devices has a configuration equivalent to that of the communication device 100.

  As an example in which the server 1302 is an application stored in the storage 1301 and realizes a configuration equivalent to that of the communication apparatus 100, a case where the terminals 1303 to 1305 are thin clients that execute a program only on the server 1302 can be considered. The terminals 1303 to 1305 according to the present embodiment may be either a thin client or a client that can download a program from the storage 1301.

  Furthermore, each program executed by the server 1302 or the terminals 1303 to 1305 is stored in the storage 1301 in the format shown in FIG. 2 or a format equivalent thereto. And the application program and control information memorize | stored in the storage 1301 are transmitted to the server 1302 and the terminals 1303-1305 as needed. The transmitted application program and control information are expanded in the server 1302 and the storage devices (for example, RAM) provided in the server 1302 and the terminals 1303 to 1305 in the format shown in FIG.

  In this case, user information is set in the context of the control information stored in the storage 1301. As a result, regardless of the device (terminals 1303 to 1305 functioning as a normal client or a thin client) used by the user, it is possible to perform communication control appropriate to the network status and the user to be used.

  By storing application programs and control information used by a plurality of users in the storage 1301 and holding user information in the context of the control information in this way, a large number of users for each of the devices (terminals 1303 to 1305) can be obtained. When sharing and using, communication control suitable for the logged-in user can be performed regardless of the device.

  FIG. 14 shows an example of the application program 1401 and control information 1402 after being stored in the storage unit 101 included in the server 1302 or the terminals 1303 to 1305. In the control information 1402 stored in the storage unit 101 illustrated in FIG. 14, an entry in which the information ID “a” is set is stored. And it can confirm that the information which identifies the user A-the user C is set to the context of each entry shown in FIG. In the context format shown in FIG. 14, the actual format is as shown in FIG. 3. However, in order to facilitate the explanation, it is described with attention to user information.

  Thus, even if the application program is the same and the information ID is the same, a different value can be held for each user. Thus, for example, for the user A who uses any one of the terminals 1303 to 1305 for the purpose of using the Web mail by the Web browser, a value of 500 kbps is stored as the average reception throughput. On the other hand, a value of 3 Mbps is stored as an average reception throughput for user B who activates the Web browser for the purpose of viewing moving images on any of the terminals 1303 to 1305.

  At this time, it is considered that a certain user often uses a web browser to access a web mail server, and another user often accesses a moving image distribution server to view a moving image. That is, appropriate state information and control information can be stored for each user.

  The environment information acquisition unit 108 according to the present embodiment identifies user information indicating the user who actually started the application program, and the storage 1301 stores the past usage status of the user. The accumulation procedure is the same as in the first embodiment except that the storage unit 101 is changed to the storage 1301, and the description thereof is omitted.

  When the terminals 1303 to 1305 are thin clients, when the user uses an arbitrary terminal, the server 1302 specifies user information for identifying the user, and stores an entry having a context including the user information. Obtained from 1301. In addition, any method may be sufficient as the identification method of user information, and the user information at the time of login authentication of each terminal 1303-1305 may be used. An initial value suitable for the user can be derived from the acquired entry.

  Further, while the application program is being executed by the execution unit 107, the detection unit 109 detects information indicating an operation tendency in the network. And the control part 106 can derive a usage tendency of a specific user by performing statistical processing. Furthermore, by storing the derived usage tendency in the storage 1301 in association with the application program, it is possible to prepare for the next operation.

  The initial value derivation process and the usage trend derivation process are in accordance with the processes described with reference to FIGS. However, since the details are different from the process described in the detailed description of the first embodiment, it is supplemented.

  In the first embodiment, as an example, an entry is acquired based on the match / mismatch / similarity of network state information, and the match / mismatch / similarity of control information used for communication associated with the entry is determined. As described above, the initial value is derived. On the other hand, in the present embodiment, the user information may be mounted with the highest priority when the entry is acquired. In this way, user-oriented parameter adjustment can be executed reliably.

  Conversely, when other information is similar even if the user information included in the context is different, an entry having the context may be acquired and an initial value may be derived based on the control information of the entry. For example, it is assumed that the information when the user A uses the Web browser is stored in the storage 1301, but the information when the user C uses the Web browser is not stored in the storage 1301. In that case, the initial value of the user C may be derived using the entry in which the user A is set.

  According to the present embodiment, an appropriate entry is acquired from the control information stored in the storage 1301 using user information, and parameter adjustment is performed according to the entry. Even if it is used in the above, the parameters can be adjusted appropriately. In particular, in a network system including a plurality of terminals, it is possible to perform communication control suitable for the user regardless of which terminal the user uses.

  As shown in FIG. 15, the communication apparatus 100 according to the present embodiment includes a CPU 1501, a ROM (Read Only Memory) 1502, a RAM 1503, an HDD 1504, a wired network I / F 103, a wireless network I / F 102, and the like. A bus 1505 to be connected, and has a hardware configuration using a normal computer.

  The HDD 1504 corresponds to the storage unit 101. Furthermore, dedicated hardware for the detection unit 109 to perform detection may be provided. The control unit 106 and the execution unit 107 may be realized by an OS (Operating System). In addition, a work area or the like used by the execution unit 107 is created on the RAM 1503.

  A communication program executed by the communication apparatus 100 according to the present embodiment is an installable or executable file, such as a CD-ROM, a flexible disk (FD), a CD-R, a DVD (Digital Versatile Disk), or the like. The program is provided by being recorded on a computer-readable recording medium.

  Further, the communication program executed by the communication apparatus 100 according to the present embodiment may be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network. The communication program executed by the communication apparatus 100 according to the present embodiment may be configured to be provided or distributed via a network such as the Internet.

  In addition, a communication program executed by the communication apparatus 100 of the present embodiment may be configured to be provided by being incorporated in advance in the ROM 1502 or the like.

  The communication program executed by the communication apparatus 100 according to the present embodiment has a module configuration including the above-described units (communication unit, registration / update unit, control unit, execution unit, environment information acquisition unit, detection unit). As the actual hardware, the CPU 1501 reads out and executes the communication program from the storage medium, so that the respective units are loaded onto the RAM 1503 serving as the main storage device, and the communication unit, registration / update unit, control unit, and execution unit An environment information acquisition unit and a detection unit are generated on the RAM 1503.

It is a block diagram which shows the structure of the communication apparatus concerning 1st Embodiment. It is a conceptual diagram showing the information which the memory | storage part has memorize | stored. It is the figure which showed the table structure of the control information which a memory | storage part memorize | stores. It is the figure which showed the 1st example of the detailed information of the context which control information has. It is the figure which showed the 2nd example of the detailed information of the context which control information has. It is a flowchart which shows the execution procedure of the application program of the communication apparatus concerning 1st Embodiment. It is a flowchart which shows the control procedure performed while the application program of the communication apparatus concerning 1st Embodiment is being executed. It is the figure which showed the example of the control information matched with the application program A in a memory | storage part. It is the figure which showed the example of the context stored in the control information matched with the application program A. It is a figure which shows the example of an operation | movement screen of the application program assumed in 2nd Embodiment. It is the figure which showed the 1st example of the detailed information of the context which control information has. It is the figure which showed the example of the control information which the memory | storage part concerning 2nd Embodiment memorize | stores. It is a figure which shows a structure of the network system concerning 3rd Embodiment. It is a figure which shows the example of the application program after being stored in the memory | storage part with which a server or a terminal is provided, and control information. It is the figure which showed the hardware constitutions of the communication apparatus.

Explanation of symbols

100 Communication Device 101 Storage Unit 102 Wireless Network I / F
103 Wired network I / F
DESCRIPTION OF SYMBOLS 104 Communication part 105 Registration / update part 106 Control part 107 Execution part 108 Environment information acquisition part 109 Detection part 111 Detection part 150 Server 1301 Storage 1302 Server 1303-1305 Terminal 1306 Network 1501 CPU
1502 ROM
1503 RAM
1504 HDD
1505 bus

Claims (9)

A communication unit that performs communication control via a network;
An execution unit that executes an application that requests communication with the communication unit;
A detection unit for detecting state information indicating a network state used by the communication unit;
A storage unit that stores state information indicating a network state and communication control information that performs control suitable for the network state with respect to communication that the application requests to the communication unit;
A control unit for controlling communication requested by the application to the communication unit based on the state information detected by the detection unit and the communication control information associated with the storage unit;
A communication apparatus comprising: The control unit further controls communication requested by the application to the communication unit based on the network state detected by the detection unit,
A registration unit that associates the state information detected by the detection unit with communication control information indicating control of communication performed by the control unit and registers the information in the storage unit,
The communication apparatus according to claim 1, further comprising: The control unit requests the application based on the state information detected by the detection unit and the control information associated with the storage unit before the execution unit executes the application. Setting initial values for controlling communication;
The communication apparatus according to claim 1 or 2, characterized by the above. An environment information acquisition unit for acquiring environment information for identifying an environment in which the application is executed in the network state;
The storage unit further stores the environment information in association with each other,
The control unit further controls communication requested by the application based on the communication control information associated with the environment information acquired by the environment information acquisition unit;
The communication apparatus according to any one of claims 1 to 3. The environment information acquisition unit includes, as the environment information, any one or more of an execution user of the application, a protocol, a port number, a destination IP address / port number, a type of application data, a processing load, and a memory usage amount. Getting a combination,
The communication device according to claim 4. The detection unit detects, as the network state, any one or more of a network interface to be used, a transmission source IP address, a transmission destination port number, a transmission data amount, a throughput, an allowable delay, and an allowable jitter;
The communication device according to claim 4, wherein: The control unit performs communication control using a congestion control window size, a reception window size, a TCP congestion control algorithm, and a threshold value of the control algorithm as the communication control information;
The communication device according to any one of claims 1 to 6. A communication method executed by a communication device,
The communication apparatus includes a storage unit that stores state information indicating a network state in association with communication control information that performs control suitable for the network state with respect to communication requested by the application to the communication unit. ,
A communication step in which a communication unit performs communication control via a network;
An execution step of executing an application for requesting communication to the communication unit;
A detecting step for detecting the state information indicating a network state used by the communication unit;
A control step for controlling communication requested by the application to the communication unit based on the state information detected by the detection step and the communication control information associated with the storage unit;
A communication method characterized by comprising: The computer includes a storage unit that stores state information indicating a network state and communication control information that performs control suitable for the network state with respect to communication that the application requests to the communication unit,
A communication step for controlling communication via a network;
An execution step of executing an application requesting communication to the communication unit;
A detection step of detecting the status information indicating a network status used by the communication unit;
A control step for controlling communication requested by the application to the communication unit based on the state information detected by the detection step and the communication control information associated with the storage unit;
A communication program for causing a computer to execute.

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