JP2004007112A - Internet protocol connection request control device, internet protocol connection service control system and tenant building network accommodation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform guarantee control of a real-time communication based on the number of connection and to unify a quality assurance control of the real-time communication in a network in which a plurality of tenants in the same building have. <P>SOLUTION: A connection request control device 9 is an Internet protocol connection service for group houses (tenant building 1) which guarantee the quality of a real-time application, includes a multiple device 5 and a multiplex transmission line 6 set up in the tenant building 1, includes an office multi-sorting device 8 set up in a company building 7, and controls the quality of the connection service of the real-time application to be provided to each tenant unitarily each accommodation tenant based on the number of the real-time application. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection control technique in an IP (Internet Protocol) network such as the Internet, and more particularly to an IP connection control technique suitable for efficiently guaranteeing connection quality of a real-time application.
[0002]
[Prior art]
In networks such as the Internet that perform data communication by IP, connections of applications that distribute stream data (sound and video) and real-time applications such as Internet telephony and Internet conferencing can be performed while guaranteeing the quality of the network while limiting the bandwidth. Bandwidth control is performed in order to be performed inside.
[0003]
For example, the flow control described on pages 59 and 200 of Osamu Maruyama, "Easy-to-understand Communication Protocol Technology" (1997, published by Ohm Co., Ltd.), the shaping described on pages 193, 194 and 198, and the There is a conventional technique such as RSVP (ReSerVation Protocol) described on page 212. In this RSVP, communication resources on a transfer path are reserved (reserved) in advance prior to data transfer to minimize delay. To enable real-time communication.
[0004]
2. Description of the Related Art In recent years, computer networks have become widespread, and each tenant in the same building has constructed an individual LAN (Local Area Network), and each LAN has been connected to an external IP network such as the Internet.
[0005]
In such a network configuration, in order to enable real-time communication, a band control device and a connection request control device are individually installed at the boundary of the LAN so that traffic inflow into the LAN does not exceed the limited band. In addition, the cache server and the distribution server in the LAN limit the number of connections and the band according to the receiving capability of the terminal and the degree of congestion in the network to guarantee the service quality.
[0006]
However, such a conventional technique requires expensive dedicated application proxies and bandwidth control devices to be installed for each tenant, resulting in high costs. Further, since the service provider is installed on the tenant building side, it is difficult for the service provider to perform centralized control, and a band not used by another tenant cannot be used effectively. Furthermore, it can only control connection requests for specific servers and specific applications. In addition, the number of connections is passively changed according to the reception capability of the terminal, the degree of congestion in the network, and the like, and the number of connections cannot be controlled in advance to guarantee real-time communication.
[0007]
[Problems to be solved by the invention]
The problem to be solved is that the conventional technology cannot perform guarantee control of real-time communication based on the number of connections.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to solve these problems of the related art, and to make it possible to centrally perform quality assurance control of real-time communication in a network owned by a plurality of tenants in the same building, for example.
[0009]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, a packet identification unit for determining a connection request packet of a real-time application, a connection state management unit for counting and storing the number of connected and requested real-time applications, and a real-time application When the connection request packet is received, it is determined whether or not the number of connected and connection-requested real-time applications stored in the connection state management unit has reached a predetermined threshold value. A comparison unit that discards a connection request packet of a real-time application is provided, for example, in a device that controls connection between each LAN owned by a plurality of tenants in the same building and an external IP network, and is controlled collectively by each tenant. It is configured to be controlled.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 is a block diagram showing a configuration example of a tenant building network accommodation system according to the present invention. FIG. 2 is a sequence diagram showing an example of a connection control operation in the tenant building network accommodation system in FIG. 1, and FIG. FIG. 2 is a block diagram illustrating a configuration example of a connection request control device in FIG. 1.
[0012]
In FIG. 1, 1 is a tenant building, 2 to 4 are LANs for tenants A to C provided in the same tenant building 1, 5 is a multiplexing device in a user building accommodating LANs 2 to 4 for each tenant, 6 Is a multiplex transmission path, 7 is a business building that provides a communication quality assurance service for the LANs 2 to 4 of each tenant, and 8 is a LAN installed in the business building 7 and the LANs 2 to 4 of each tenant in the tenant building 1 and an external IP network. An intra-station multiplex sorting device for controlling connection with the network; 9, a connection request control device provided in the enterprise building 7 for performing communication quality assurance service control according to the present invention; 10, an external IP network such as the Internet; Are cache servers A and B provided in the IP network 10, and 13 and 14 are distribution servers A and B provided in the IP network 10.
[0013]
As described above, the configuration includes the multiplexing device 5 in the user building installed in the tenant building 1, the multiplex transmission line 6, the in-station multiplex sorting device 8 installed in the operator building 7, and the connection request control device 9, and in this example, The connection request control unit 9 controls the number of real-time application connections, and the central office multiplex sorting unit 8 centrally controls the quality of the real-time communication service, thereby guaranteeing the quality of the real-time application. Provide connection services.
[0014]
That is, in this example, the connection request control device 9 centrally controls the number of connections of the real-time application for each accommodation tenant, so that the quality of service provided by the intra-station multiplex distribution device 8 is integrally controlled. .
[0015]
As described above, the connection request control is performed in the intra-office multiplex distribution device 8 and the connection request control device 9 in the business building 7 in which the traffic of all the tenants and all the applications is concentrated, so that the quality of each tenant and each application is improved. The control can be performed in a unified manner, so that the cost can be reduced by consolidating the devices and the bandwidth can be effectively used.
[0016]
FIG. 2 shows a flow (protocol) of an application connection request performed between a user (client) of the LAN 2 to 4 of each tenant in the tenant building 1 and each of the servers 11 to 14 on the IP network 10. A solid line with an arrow indicates the flow of connection / disconnection control, and a dotted line with an arrow indicates the flow of data.
[0017]
That is, between the client and the server, after establishing a control connection by Transmission Control Protocol (TCP), the client sends a request for application connection to the server and a packet for negotiation, and the server connects to the client in response to the request. When the response packet is returned, the control connection by TCP is released, and thereafter, data transfer by UDP (User Datagram Protocol) indicated by a dotted line is performed.
[0018]
When the data transfer is completed, after the control connection is established by TCP, a packet for sending an application disconnection request is sent from the client to the server, and in response to the packet, the server returns a disconnection response packet to the client. Connection is released.
[0019]
The flow of the connection / disconnection control indicated by the solid line is the control target of the real-time application quality according to the present example, and the control content will be described below with reference to FIG.
[0020]
As shown in FIG. 3, the connection request control device 9 of this example includes a maximum connection number table 31, a packet identification unit 32, a packet interpretation unit 33, a connection management unit 34, a comparison unit 35, an output unit 36, and a setting unit 37. The maximum number of connections is set in advance in the maximum connection number table 31 by the setting unit 37 for each tenant.
[0021]
The packet identification unit 32 uses a TCP port number or the like (a target port number is defined in advance for each tenant) to convert a received packet into a real-time application connection request / connection response / disconnection request / disconnection response. It is determined whether the packet is a real-time application control packet including a packet. If the packet is not a real-time application control packet, the packet is transferred to the intra-station multiplex sorting device 8 via the output unit 36. It is transferred to the interpretation unit 33.
[0022]
The packet interpreting unit 33 interprets the real-time application control packet from the packet identifying unit 32, and acquires tenant (identified by IP address, VLAN-ID, etc.) information, application identification information (TCP port number, etc.), and packet contents (connection Request / connection response / disconnection request / disconnection response packet) information. If the packet content is a connection request / connection response, the packet is transferred to the comparison unit 35, and if the packet content is a disconnection request / disconnection response, the packet is transferred to the connection management unit 34.
[0023]
The connection management unit 34, based on the disconnection request / disconnection response packet from the packet interpretation unit 33, for each tenant (A, B,...), For each application (X, Y,. The number of connection requests and the number of disconnection requests are counted and stored in the connection state table 34a. For example, when the disconnection request packet for the real-time application X of tenant A arrives, the number “AX3” in the disconnection request is set to “AX3 + 1”, and when the disconnection response packet arrives, the number “AX3” in the disconnection request is “AX3-1”. , And the established number “AX1” is assumed to be “AX1-1”. Thereafter, the packet is transferred to the output unit 36.
[0024]
When the comparison unit 35 receives the connection request / connection response packet from the packet interpretation unit 33 and transfers it to the output unit 36, if the connection request packet or the connection request response packet is a connection request packet or a connection request response packet, the tenant and the application connection state table 34a The contents and the maximum connection number table 31 are compared.
[0025]
Then, when the connection request packet for the real-time application X of tenant A arrives, if “established number“ AX1 ”+ number of connection requests“ AX2 ”<maximum number of connections of tenant A“ AX ””, the packet interpreter The connection request packet from 33 is transferred to the output unit 36, and the number “AX2” in the connection request in the connection state table 34a is changed to “AX2 + 1” via the connection management unit 34. If “established number“ AX1 ”+ number of connection requests“ AX2 ”≧ maximum number of connections of tenant A“ AX ””, the connection request packet is discarded.
[0026]
When the connection request response packet for the real-time application X of tenant A arrives, the connection request response packet is transferred to the output unit 36, and the established number “AX1” of the connection state table 34a is transmitted via the connection management unit 34. “AX1 + 1” and the number “AX2” in the connection request to “AX2-1”.
[0027]
As described above, the connection request control device 9 controls the connection request of the traffic passing through the intra-station multiplex sorting device 8 installed in the business building 7, whereby each accommodation in the tenant building 1 in the business building 7 is performed. Unified quality control based on the number of real-time application connections for each tenant is possible.
[0028]
Further, the setting unit 37 dynamically changes the setting contents in the maximum connection number table 31 according to the connection status of the real-time application for each tenant in the connection state table 34a.
[0029]
That is, time information is added to the connection status information of the real-time application for each tenant in the connection status table 34a, and the setting unit 37 refers to the connection status of the real-time application for each tenant in the connection status table 34a. If the connection of the real-time application in B has not been made for a long time, the maximum connection number “AX” of the tenant A in the maximum connection number table 31 is increased to “AX + 1”. This allows efficient use of bandwidth.
[0030]
The connection request control device 9 has a computer configuration including a CPU (Central Processing Unit), a main memory, a display device, an input device, an external storage device, and the like, and is connected to a recording medium such as a CD-ROM via a drive device. After the recorded programs and data are installed in the external storage device, the functions of the respective processing units may be realized by reading them from the external storage device to the main memory and processing them by the CPU. A configuration may be adopted.
[0031]
As described above with reference to FIGS. 1 to 3, in this example, the connection request packet of the real-time application is determined for each tenant, and the number of connected and requested real-time applications is counted and stored for each tenant. When the connection request packet of the real-time application is received, the number of connected and requested real-time applications stored corresponding to the tenant becomes the maximum number of connections (threshold) predetermined for the tenant. It is determined whether or not the connection has been reached, and if it has been reached, the received connection request packet of the real-time application is discarded, and the connection of the real-time application to each tenant is collectively controlled based on the number of connections of the real-time application.
[0032]
As described above, the intra-office multiplex distribution device 8 and the connection request control device 9 are installed in the business entity building 7 that controls connection between each of the LANs 2 to 4 owned by a plurality of tenants in the same tenant building 1 and the external IP network 10. As a result, there is no need to install expensive dedicated application proxies and bandwidth control devices for each tenant as in the past, and unified quality control for each accommodation tenant based on the number of connections and for each real-time application is possible in the operator building 7. As a result, it becomes possible to provide high-quality services, economical integration of devices, and effective use of bandwidth.
[0033]
It should be noted that the present invention is not limited to the example described with reference to FIGS. 1 to 3 and can be variously modified without departing from the gist thereof. For example, in this example, the intra-office multiplex sorting device 8 and the connection request control device 9 are configured separately in the business building 7, but the connection request control device 9 may be provided in the intra-office multiplex sorting device 8. good.
[0034]
Further, each tenant's networks (LAN) 2 to 4 are connected to an external IP network 10 by a user building multiplexing device 5 installed in the tenant building 1, and the connection request control device 9 is connected to the user building multiplexing device 5 It is good also as a structure provided in.
[0035]
Alternatively, instead of controlling connection of a real-time application to a network (LAN) constructed by a plurality of tenants in the same building as in the present example, one internal IP network is controlled and a connection from an external IP network is performed. The present invention is also applicable to a configuration for controlling connection of a real-time application.
[0036]
Further, in the example of FIG. 1, the intra-station multiplex sorting device 8 of the business building 7 is configured to control one tenant building 1 as a target, but as shown by a broken line in FIG. Similar control can be performed for a plurality of tenant buildings including a building.
[0037]
In this example, the real-time application connection request packet is identified by the packet identification unit 32. However, the packet identification unit 32 identifies only the real-time application control packet. A configuration may be adopted in which a real-time application control packet from the server is interpreted and the packet content (connection request / connection response / disconnection request / disconnection response packet) information is extracted.
[0038]
Furthermore, in this example, connection control based on the number of connections to the real-time application is performed for each tenant and for each real-time application. However, the configuration is simply performed for each tenant or in units of many groups. For example, the configuration may be such that it is performed on the same.
[0039]
【The invention's effect】
According to the present invention, unlike the related art, there is no need to install expensive dedicated application proxies and bandwidth control devices for each tenant, and it is possible to perform centralized quality control for each accommodation tenant based on the number of connections and for each application. Services, economics by consolidating devices, and effective use of bandwidth.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration example of a tenant building network accommodation system according to the present invention.
FIG. 2 is a sequence diagram showing an example of a connection control operation in the tenant building network accommodation system in FIG.
FIG. 3 is a block diagram illustrating a configuration example of a connection request control device in FIG. 1;
[Explanation of symbols]
1: Tenant building, 2: Tenant A, 3: Tenant B, 4: Tenant C, 5: Multiplexing device in user building, 6: Multiplexing transmission line, 7: Business building, 8: Multiplexing device in office, 9: Connection Request control function, 10: IP network, 11: cache server A, 12: cache server B, 13: distribution server A, 14: distribution server B, 31: maximum connection number table, 32: packet identification unit, 33: packet interpretation Unit, 34: connection management unit, 34a: connection state table, 35: comparison unit, 36: output unit, 37: setting unit.

Claims (15)

An IP connection request control device for controlling connection of a plurality of applications between a user terminal device and a server device via an IP network, wherein the first device determines that a received packet is a connection request packet of a real-time application. Means,
Second means for counting and storing the number of connected and requested real-time applications;
When the first means determines the reception of the connection request packet of the real-time application, it refers to the storage contents of the second means and determines whether the number of connected and requested real-time applications is a predetermined threshold. A third unit for discarding the received connection request packet of the real-time application. The IP connection request control device according to claim 1, wherein
The second means counts and stores the number of the real-time applications for each of a plurality of users,
The first means determines a connection request packet of a real-time application for each user,
An IP connection request control device according to claim 3, wherein said third means references and discards the storage contents of said second means with respect to a connection request packet of said real-time application for each user. The IP connection request control device according to claim 1, wherein
The second means counts and stores the number of the real-time applications for each of a plurality of users and real-time applications,
The first means determines a connection request packet of a real-time application for each user and each real-time application,
An IP connection request control device according to claim 3, wherein the third means references and discards the stored content of the real-time application connection request packet in the second means for each user and real-time application. An IP connection request control device according to any one of claims 2 and 3,
A setting means for assigning a predetermined total number of real-time applications to each user based on the number of connections for each user stored in the second means as a threshold value used by the third means. Characteristic IP connection request control device. An IP connection service control system for controlling an application connection between an internal IP network and an external IP network of each of a plurality of tenants in the same building,
First means for determining, by tenant, that the received packet is a connection request packet of a real-time application;
Second means for counting and storing the number of connected and requested real-time applications for each tenant;
When the first means determines that the connection request packet of the real-time application has been received, the content stored in the second means corresponding to the tenant is referred to, and the connection to the tenant and the connection-requested real-time application are performed. And a third means for discarding the received connection request packet of the real-time application if the number is a predetermined threshold value for the tenant. An IP connection service control system for controlling an application connection between an internal IP network and an external IP network of each of a plurality of tenants in the same building,
First means for determining that the received packet is a connection request packet of a real-time application for each tenant and each real-time application;
Second means for counting and storing the number of connected and requested real-time applications for each tenant and real-time application;
When the first means determines the reception of the connection request packet of the real-time application, the content stored in the second means corresponding to the tenant and the real-time application is referred to, during the connection to the tenant and the real-time application and A third means for discarding the received real-time application connection request packet if the number of real-time applications for which connection is requested is a predetermined threshold value for the tenant and the real-time application. Connection service control system. An IP connection service control system according to any one of claims 5 and 6,
A user building multiplexing device provided in the same building and accommodating respective internal IP networks of the plurality of tenants;
An intra-station multiplex sorting device that is provided in a building other than the same building and is connected to the user building multiplexing device by a multiplex transmission line and controls connection with a plurality of server devices on the external IP network;
The intra-station multiplex sorting device is provided with the first to third means, and the intra-station multiplex sorting device is configured to control connection of a real-time application to each internal IP network of the plurality of tenants. Connection service control system. The IP connection service control system according to any one of claims 5 to 7, wherein:
There is provided a setting means for allocating, as a threshold value used by the third means, a predetermined total number of connections of the real-time application based on the number of connections of each real-time application stored in the second means. IP connection service control system. A user building multiplexing device that accommodates respective internal IP networks of a plurality of tenants provided in the same building and performs connection control;
Each of the plurality of tenants is provided in a building other than the same building, controls connection with an external IP network, is connected to the user building multiplexing device by a multiplex transmission line, and is connected to each of the plurality of tenants via the user building multiplexing device. An intra-station multiplex sorting device that controls connection between an internal IP network and a plurality of server devices on the external IP network,
The intra-station multiplex sorting device is provided with control means for collectively controlling the connection of the real-time application in each internal IP network of the plurality of tenants and integrally controlling the connection service quality of the real-time application to each internal IP network. Tenant building network accommodation system characterized by the following. It is a tenant building network accommodation system of Claim 9, Comprising:
A tenant, wherein the control means counts and stores the number of connections of the real-time application, and performs connection control of the real-time application to maintain the connection service quality based on the stored number of connections of the real-time application. Building network accommodation system. The tenant building network accommodation system according to claim 10, wherein
The control means counts and stores the number of connections of the real-time application for each tenant, and maintains the connection service quality for each tenant based on the stored number of connections of the real-time application for each tenant. A tenant building network accommodation system, which performs connection control of the real-time application. The tenant building network accommodation system according to claim 10, wherein
The control means counts and stores the number of connections of the real-time application for each tenant and real-time application, and, based on the stored number of connections of the real-time application for each tenant and real-time application, stores the number of connections for each tenant and real-time application. A tenant building network accommodation system, wherein connection control of the real-time application is performed so as to maintain the connection service quality. It is a tenant building network accommodation system of Claim 9, Comprising:
The control means includes:
First means for determining, by tenant, that the received packet is a connection request packet of a real-time application;
Second means for counting and storing the number of connected and requested real-time applications for each tenant;
When the first means determines that the connection request packet of the real-time application has been received, the content stored in the second means corresponding to the tenant is referred to, and the connection to the tenant and the connection-requested real-time application are performed. And a third means for discarding the received connection request packet of the real-time application if the number is a predetermined threshold value for the tenant. It is a tenant building network accommodation system of Claim 9, Comprising:
The control means includes:
First means for determining that the received packet is a connection request packet of a real-time application for each tenant and each real-time application;
A second unit that counts and stores the number of the real-time applications that are being connected and connection-requested for each tenant and a real-time application, and when the first unit determines reception of the connection request packet of the real-time application, By referring to the content stored by the second means corresponding to the tenant and the real-time application, the number of the real-time applications that are being connected to or requested to connect to the tenant and the real-time application are previously determined for the tenant and the real-time application. A third means for discarding the received real-time application connection request packet if the threshold value is a predetermined threshold value. It is a tenant building network accommodation system according to any one of claims 13 and 14,
Setting means for assigning a predetermined total number of real-time applications to each user based on the number of real-time application connections stored in the second means as a threshold used by the third means. Characteristic tenant building network accommodation system.

Images