JP4644159B2 - COMMUNICATION CONTROL METHOD, COMMUNICATION CONTROL DEVICE, AND USER TERMINAL - Google Patents

Description

  The present invention relates to a communication control method, a communication control device, and a user terminal.

Conventionally, a user program shares a communication environment with another user program for one communication, or can be used by a specific user program, such as GMPLS (Generalized Multi Protocol Label Switching, see Non-Patent Document 1), MPLS (Multiple Protocol Label Switching (see Non-Patent Document 2) Using RSVP-TE (Resource Reservation Protocol-Traffic Engineering, Non-Patent Document 3) on the network, a path is set in advance to create a dedicated quality assurance environment. The user decides and communicates using the environment.
IETF, “Generalized Multi-Protocol Label Switching (GMPLS) Architecture”, [online], [searched on May 23, 2006], Internet <URL: http://www.ietf.org/rfc/rfc3945.txt> IETF, “Multiprotocol Label Switching Architecture”, [online], [searched on May 23, 2006], Internet <URL: http://www.ietf.org/rfc/rfc3031.txt> IETF, “Generalized Multi-Protocol Label Switching (GMPLS) Signaling Resource ReserVation Protocol-Traffic Engineering (RSVP-TE) Extensions”, [online], [May 23, 2006 search], Internet <URL: http: // www.ietf.org/rfc/rfc3473.txt>

  In conventional communication control for quality assurance, control contents are set before communication to be controlled occurs. However, since the communication performance required by the user program changes dynamically, it is impossible to respond to a dynamic request with control contents determined by the user in advance. Therefore, excessive control or insufficient control has occurred in the control content determined in advance.

  Hereinafter, an example of excessive control will be described. If the maximum resource required from the beginning is secured, waste occurs. For example, if sufficient communication performance can be realized in a shared network, there is no need to set a dedicated quality assurance path. If the communication situation using the shared network is good and the user program exceeds the communication performance planned in the first half of communication, there is no problem even if the performance deteriorates somewhat in the second half. However, with the control content set in advance, a dedicated quality assurance path is set, and excessive control is performed to secure unnecessary communication resources.

  In view of the above, the main object of the present invention is to solve the above-described problems and increase the utilization efficiency of resources of a communication network when performing communication of a session between user terminals.

In order to solve the above-described problem, the present invention provides a communication control method for controlling communication between user terminals set on a communication network, wherein a computer monitors a monitoring target session to be monitored and the monitoring target session. As a control condition when performing communication control, a procedure for acquiring a condition for transferring a predetermined amount of data within a predetermined time and storing it in a storage means, and a communication status relating to the monitor target session , the current monitoring target session In the procedure for acquiring the communication speed of the monitoring session from the communication network and the process for determining whether the communication status satisfies the control condition , the communication speed of the acquired session to be monitored is the predetermined data amount. when the data amount of non-transferred portion of out is determined not be transferred within the remaining time of the predetermined time, the monitoring target session, through Communication control based on information on the communication network configured from at least one of a procedure for determining a control target session to be controlled, a network topology related to the communication network, and network resources for the control target session And a procedure for performing.

  Thus, when performing session communication between user terminals, the necessary amount of communication network resources is secured when necessary, so that the utilization efficiency of communication network resources can be increased.

  The present invention is characterized in that the procedure for acquiring the control condition and storing it in the storage means receives the control condition from the user terminal of the monitoring target session.

  As a result, the user terminal can explicitly specify the control conditions by itself.

  In the present invention, the procedure for acquiring the control condition and storing it in the storage means is based on the information on the communication network received from the communication device on the communication network, and the control of the monitoring target session and the monitoring target session. It is characterized by creating conditions.

  This eliminates the need for the user terminal to explicitly perform communication control on its own, thereby simplifying the function of the user terminal.

  The present invention is characterized in that the communication control procedure controls a path on the communication network by MPLS or GMPLS for a communication apparatus on the communication network.

  As a result, the setting cost can be reduced as compared with the method of manually setting the path.

  The present invention is characterized in that the procedure for performing the communication control sets packet transfer priority control by Diffserv for a communication device on the communication network.

  As a result, the amount of control processing can be reduced compared with the priority control in units of paths, so that a large amount of communication can be handled.

The present invention is a communication control device that performs communication control of a session between user terminals set on a communication network, and as a control condition when performing communication control of a monitoring target session to be monitored and the monitoring target session , A communication control information registration unit that acquires a condition for transferring a predetermined amount of data within a predetermined time and stores it in the communication control information DB; and a communication status of the monitored session as a communication status regarding the monitored session. In the process of determining whether the communication status is acquired from the communication network and whether the communication status satisfies the control condition , the communication speed of the acquired current monitoring target session includes the predetermined data amount when the data amount of non-transferred amount is determined not to be transferred to the remaining time of the predetermined time, the monitoring target session, the communication control A control condition determination unit that is determined as a control target session, and communication with respect to the control target session based on information about the communication network including at least one of a network topology related to the communication network and network resources A communication control instruction unit for performing control.

  Thus, when performing session communication between user terminals, the necessary amount of communication network resources is secured when necessary, so that the utilization efficiency of communication network resources can be increased.

  The present invention is the user terminal of the session to be controlled that is communication-controlled by the communication control device.

  This eliminates the need for the user terminal to explicitly perform communication control on its own, thereby simplifying the function of the user terminal.

  According to the present invention, when performing session communication between user terminals, the necessary amount of communication network resources is ensured when necessary, so that the utilization efficiency of communication network resources can be improved.

  Hereinafter, an embodiment of a communication system to which the present invention is applied will be described in detail with reference to the drawings.

  FIG. 1 is a configuration diagram showing the entire communication system.

  The backbone network 1 is an IP (Internet Protocol) network composed of broadband links. The backbone network 1 includes a backbone network device such as an optical cross connect (OXC) (not shown) and a node 3, for example. The state of the entire backbone network is managed by, for example, OSPF-TE (Open Shortest Path First-Traffic Engineering).

  Note that the backbone network 1 may be configured as a network capable of both best effort communication on a shared network and individual quality assurance communication. The backbone network 1 may be a network to be controlled. Note that the network to be controlled may be not only the backbone network 1 but also a virtual network composed of a part of the resources of the backbone network 1.

  The peripheral network 2 (2a, 2b) is a network for directly connecting the user terminals 4, and is connected to the backbone network 1 by a node 3 serving as an edge router. The peripheral network 2 is configured using a LAN (Local Area Network) such as Ethernet (registered trademark), for example, and each communication device of the peripheral network 2 is connected to a LAN network cable (not shown) and a network hub (not shown). It is possible to communicate with each other by using relay devices such as a router (not shown) and a router (not shown). The peripheral network 2 may be a network to be controlled.

  The node 3 (3a, 3b) is a communication device of the backbone network 1 by IP, but may be a communication device by a general network instead of IP. The node 3 can perform transfer order control by Diffserv and quality control using path control technology such as MPLS and GMPLS.

  In the user terminal 4 (4a, 4b), the user program processing unit 10 executes the user program. A session that mediates communication by the user program is set between the user terminal 4 and the user terminal 4. A session is not set in each node 3 when the backbone network 1 is a shared network that shares resources.

  The user program processing unit 10 (10a, 10b) sets a session with the user program processing unit 10 of another device by executing the user program, and communicates user program data to each other via the session. To do.

  The communication control device 5 monitors the communication status of the session and controls session communication. The communication control device 5 and the node 3 are configured as a computer including at least a memory serving as a storage unit used when performing arithmetic processing and an arithmetic processing device that performs the arithmetic processing. The memory is constituted by a RAM (Random Access Memory) or the like. Arithmetic processing is realized by an arithmetic processing unit configured by a CPU (Central Processing Unit) executing a program on a memory.

  The communication control device 5 includes a control condition processing unit 20, a communication control processing unit 30, and a communication network information management unit 40. The configuration of the control condition processing unit 20 and the communication control processing unit 30 is clarified by an operation explanatory diagram to be described later.

  The communication network information management unit 40 manages communication network information such as network topology and network resources in the storage unit for the backbone network 1. Note that the communication network information may be managed in a distributed manner by a router that is the node 3, or may be managed in a centralized or distributed manner by a server that is not the node 3. Moreover, both may be used together, such as a router managing a network topology and a server managing network resources.

  The operation of FIG. 1 will be described below.

  When the user program processing unit 10 starts communication, the user program processing unit 10 notifies the control condition processing unit 20 of a control request and control conditions for performing session communication (S1).

  Here, the control condition is a determination criterion for determining whether or not to perform communication control of the session. The communication source IP address, the communication destination IP address, the minimum required communication bandwidth (communication bandwidth of the communication bandwidth) It is expressed using information related to communication such as a service level such as an average value. Note that the contents of the control conditions may change as data transfer or calculation processing proceeds. At that time, the user program processing unit 10 creates an appropriate control condition again and notifies the control condition processing unit 20 of it.

Table 1 below is a table showing an example of the control conditions.

  The node 3 acquires a communication status regarding a session to be monitored (hereinafter referred to as a monitoring target session) to the control condition processing unit 20 (S2).

  The communication status is, for example, information indicating that the communication environment in the backbone network 1 is good or poor, and dynamically changes with the passage of time. As a method for acquiring the communication status, for example, all or part of a packet on the network may be acquired directly or abstracted such as header information, or SNMP (Simple Network Management Protocol) or the like may be acquired for the node 3 such as a router. You may acquire using the protocol of.

  The control condition processing unit 20 determines communication (hereinafter referred to as a control target session) determined to require communication control in the monitoring target session to the communication control processing unit 30, and communication of the control target session Control is requested (S3).

  The communication control processing unit 30 performs communication control for the control target session on the backbone network 1 based on the communication network information acquired from the communication network information management unit 40 (S4).

The communication control is exemplified by the following method, for example.
-Communicate with the backbone network 1 device and change the setting of packet transfer priority control by Diffserv-Control the path for node 3 such as router using a signaling protocol such as MPLS or GMPLS such as RSVP-TE The path is controlled by accessing each node 3 using the CLI or accessing each node 3 using a protocol such as TL1. Note that examples of protocols accessed by the CLI include telnet and ssh.

  FIG. 2 is an explanatory diagram showing the control condition processing unit 20.

  The control condition processing unit 20 includes a communication control information registration unit 21, a communication control information DB 22, a communication status monitoring unit 23, and a control condition determination unit 24.

  The user program processing unit 10 performs the communication process of S1 on the communication control information registration unit 21 (S11).

  The communication control information registration unit 21 requests the communication control information DB 22 to register (accumulate or update) the information notified in S11 as communication control information (S12).

  The communication control information DB 22 registers the communication control information in the storage unit according to the registration request.

  The communication control information DB 22 notifies the communication status monitoring unit 23 of the communication control information session registered in S12 as a monitoring target session (S13).

  The communication status monitoring unit 23 monitors the monitoring target session notified to the node 3 in S13 (S21).

  The node 3 notifies the communication status monitoring unit 23 of information related to the communication status of the monitoring target session as the monitoring result of S21 (S22).

  The communication status monitoring unit 23 requests the control condition determination unit 24 to determine whether the monitoring target session requires communication control based on the communication status of the monitoring target session notified in S22 ( S23).

  The control condition determining unit 24 requests the communication control information DB 22 for a control condition related to the monitoring target session requested in S23 (S24).

  The communication control information DB 22 notifies the control condition determination unit 24 of the control condition related to the monitoring target session as a response to the request of S24 (S25).

The control condition determination unit 24 compares the communication status of S23 with the control condition of S25, and determines whether or not communication control is necessary. A monitoring target session determined to be subjected to communication control is a control target session. In addition, the presence or absence of necessity is determined as follows, for example.
-Control communication of a monitored session whose communication speed is lower than the communication bandwidth (throughput) required by the monitored session.
・ Communication control is performed on the monitoring target session for which communication is completed at the current communication speed by the communication completion time required by the monitoring target session.

  The control condition determination unit 24 requests the communication status monitoring unit 23 to perform communication control of the control target session determined in S25 (S26).

  The communication status monitoring unit 23 notifies the communication control processing unit 30 of the communication control request in S26 as shown in S2 (S27).

  FIG. 3 is an explanatory diagram showing the communication control processing unit 30.

  The communication control processing unit 30 includes a communication control instruction unit 31 and a control calculation unit 32.

  The control condition processing unit 20 notifies the communication control instruction unit 31 of communication control information (for example, path route calculation request and path control information) and control conditions (S41).

  The communication control instruction unit 31 notifies the control calculation unit 32 of the information notified in S41 (S51).

  The control calculation unit 32 requests network topology information and network resource information from the communication network information management unit 40 (S52).

  The communication network information management unit 40 notifies the control calculation unit 32 of the network topology and network resource information passively based on the request of S52 or when a change occurs periodically (S53).

  The control calculation unit 32 uses information such as communication control information, control conditions, network topology, and network resources to calculate communication control such as a new path route of a communication to be controlled and a path route to be used. .

  The control calculation unit 32 notifies the communication control instruction unit 31 of the control condition and the calculation result of the communication control to the communication control instruction unit 31 (S54).

  The communication control instruction unit 31 performs communication control of S4 on the backbone network 1 using the information notified in S54 (S61).

  FIG. 4 is another explanatory diagram showing the control condition processing unit 20. The difference between FIG. 4 and FIG. 2 is that the means for notifying the communication control information registration unit 21 of the constraint condition changes from the user program processing unit 10 in FIG. 2 to the control condition creation unit 25 in FIG. Therefore, the user program processing unit 10 may not have a means for notifying the communication control information registration unit 21 of the constraint condition.

  The control condition creating unit 25 requests the node 3 to monitor a session on the backbone network (S11A).

  As a response to S11A, the node 3 notifies the control condition creating unit 25 of information for determining whether or not the session is a monitoring target session (S11B).

  Based on the information returned from the node 3, the control condition creating unit 25 determines whether or not the session is to be monitored based on a certain rule. For example, communication that performs communication with a certain throughput or higher is determined as communication to be monitored. Further, the control condition creating unit 25 creates the monitoring target session and the control conditions for the monitoring target session based on the communication network information received from the node 3.

Table 2 below is a table showing an example in which the control condition creating unit 25 creates the control condition.

  The control condition creation unit 25 notifies the communication control information registration unit 21 of the control condition for the created monitoring target session (S11C).

  The operations after S12 are the same as those in FIG.

It is a block diagram which shows the whole communication system regarding one Embodiment of this invention. It is explanatory drawing which shows the control condition process part regarding one Embodiment of this invention. It is a block diagram which shows the communication control process part regarding one Embodiment of this invention. It is another explanatory drawing which shows the control condition process part regarding one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core network 2 Peripheral network 3 Node 4 User terminal 5 Communication control apparatus 10 User program processing part 20 Control condition processing part 21 Communication control information registration part 22 Communication control information DB
DESCRIPTION OF SYMBOLS 23 Communication condition monitoring part 24 Control condition determination part 25 Control condition creation part 30 Communication control processing part 31 Communication control instruction | indication part 32 Control calculation part 40 Communication network information management part

Claims (7)

A communication control method for controlling communication between user terminals set on a communication network,
Computer
A procedure for acquiring a condition for transferring a predetermined amount of data within a predetermined time as a control condition when performing communication control of the monitoring target session to be monitored and the monitoring target session, and storing it in a storage unit;
A procedure for acquiring the current communication speed of the monitoring target session from the communication network as the communication status related to the monitoring target session;
In the process of determining whether or not the communication condition satisfies the control condition , the untransferred data amount of the predetermined data amount is determined as the predetermined time at the acquired communication speed of the current monitoring target session. When it is determined that transfer cannot be performed within the remaining time, the monitoring target session is determined as a control target session for performing communication control; and
For the control target session, a procedure for performing communication control based on information on the communication network including at least one of a network topology related to the communication network and network resources;
The communication control method characterized by performing.   The communication control method according to claim 1, wherein the step of acquiring the control condition and storing the control condition in the storage unit receives the control condition from the user terminal of the monitoring target session.   The procedure for acquiring the control condition and storing it in the storage means creates the control condition for the monitoring target session and the monitoring target session based on the communication network information received from the communication device on the communication network. The communication control method according to claim 1.   The procedure for performing the communication control comprises controlling a path on the communication network by MPLS or GMPLS for a communication device on the communication network. The communication control method according to the item.   4. The communication control according to claim 1, wherein the procedure for performing the communication control sets packet transfer priority control by Diffserv for a communication device on the communication network. 5. Method. A communication control apparatus for controlling communication between user terminals set on a communication network,
Communication control information for acquiring a condition for transferring a predetermined amount of data within a predetermined time and storing it in the communication control information DB as a control condition for performing communication control of the monitoring target session and the monitoring target session A registration department;
As a communication status related to the monitoring target session, a communication status monitoring unit that acquires the current communication speed of the monitoring target session from the communication network;
In the process of determining whether or not the communication condition satisfies the control condition , the untransferred data amount of the predetermined data amount is determined as the predetermined time at the acquired communication speed of the current monitoring target session. when it is determined not be transferred to the remaining time, the monitoring target session, the control condition judging unit for determining a control target session for controlling communication,
A communication control instruction unit for performing communication control based on information on the communication network configured from at least one of a network topology related to the communication network and network resources for the control target session;
A communication control device comprising:   A user terminal of the controlled session controlled by the communication control device according to claim 6.

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