JP2004248193A - COMMUNICATION QUALITY ASSURANCE METHOD IN COMMUNICATION OF LOGICAL NETWORK, COMMUNICATION SYSTEM FOR IMPLEMENTING THE METHOD, QoS MANAGEMENT DEVICE AND TERMINAL USED FOR THE METHOD, AND COMPUTER PROGRAM FOR REALIZING THE QoS MANAGEMENT DEVICE AND TERMINAL - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a QoS management device and a terminal for assuring a communication quality between terminals using layer-7 routing. <P>SOLUTION: In a communication quality assurance method in the communication of a logical network, the QoS management device is equipped with a logical network communication means for sending an acquired IP address of an incoming terminal to a route calculating means together with an IP address of an originating terminal and required communication quality assurance information and sending calculated route information to the originating terminal on the basis of a logical ID of the incoming terminal, a route information collecting means for collecting route information of an IP network, the route calculating means for calculating a route between terminals with which a required communication quality can be guaranteed, from the IP addresses of the originating terminal and of the incoming terminal, the required communication quality assurance information and the route information, and a QoS control means for applying communication quality control to the calculated route. Each of terminal is provided with a physical address acquiring means for acquiring an IP address on the basis of the logical ID, an address notifying means for notifying the acquired IP addresses and the required communication quality information, and a route designated communication means for setting the route on the basis of the designated route information and performing communications. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Field of the Invention]
The present invention relates to a method for guaranteeing the quality of communication between terminal devices using routing in layer 7 defined by an OSI reference model, a communication system implementing the method, a QoS management device used for the method, and a communication terminal. Things.
The present invention further relates to a computer program for realizing the QoS management device and the terminal device.
[0002]
[Prior art]
Communication in a network topology at layer 7, such as P2P, provides ease of use to the user over communication using routing at layer 3, and allows application developers to more easily create applications. . For this reason, with respect to the complexity of the connection in layers 7 and below, concealment is performed in the basic part configuring the layer 7 network (logical network), and it does not depend on the IP network protocol at all.
[0003]
In TCP / IP, various communication protocols such as ATM and PSTN have been concealed and aggregated, but TCP / IP itself has lost flexible network connectivity due to a firewall or the like.
[0004]
The communication in the network topology in the layer 7 further aggregates and conceals TCP / IP, and in the layer 7, it is intended that all terminals (peers) have equal connectivity.
As a result, in the communication in the network topology in the layer 7, routing and transfer are performed based only on terminals and relay nodes mapped on the same layer, and do not depend on layers below the layer 7 (for example, 1-2).
[0005]
[Non-patent document 1]
LiGong, "Project JXTA: A TechnologyOverview", jxta. org on April 25, 2001 [online]
(URL: http://java.sun.com/people/gong/papers/jxrview.pdf) Search date January 24, 2003 [Non-Patent Document 2]
Takanari Hoshiai, 5 others, "Semantic Information Network Architecture", IEICE Transactions on Electronics, B Vol. J84-B No. 3 pp. 411-424, issued March 2001
[Problems to be solved by the invention]
As described above, since the communication in the network topology at the layer 7 does not depend on the routing at the lower layer 3, the routing at the layer 3 is highly likely to be very redundant. In particular, all relay nodes in layer 7 are not provided as reliable services by carriers (telecommunication carriers), but are basically volunteer-based, so that the persistence and reliability of the relay nodes cannot be guaranteed. The configuration of the network constituted by the layer 7 is very likely to change dynamically. As a result, it is very difficult to predict the path of communication through the Internet.
As a result, the communication quality of the communication in the network topology in the layer 7 cannot be guaranteed.
An object of the present invention is to provide a method for guaranteeing communication quality of communication in a network topology in a layer 7, a network QoS management device and a terminal device used in the method, and a computer program for them.
[0007]
[Means for Solving the Problems]
The communication quality assurance method for assuring communication quality of communication between terminal devices in the communication of a logical network according to the present invention includes a network QoS management device connected to a terminal device via a logical network configured by layer 7; 7 has a logical network communication function that operates as a relay node or a node of a network configured by each terminal. Each terminal has a function of communicating with a QoS management device and an IP address of its own terminal in a layer 7 logical network configuration basic part. It has a function of notifying the QoS management device.
[0008]
The originating terminal that performs communication in the layer 7 network topology notifies the QoS management device of the logical ID of the destination terminal, which is the destination, and the requested communication quality information together with the IP address of the terminal itself.
[0009]
Upon receiving the notification, the QoS management device queries the IP address of the called terminal based on the logical ID of the called terminal, obtains the IP address of the called terminal, and obtains the IP address of the called terminal and the IP address of the called terminal. From the required communication quality and the path information collected by the path information collecting means in advance, the path calculating means calculates a path between the terminals capable of guaranteeing the required communication quality in layer 3, and performs communication with the calculated path. At the same time as the quality control is performed by the QoS control means, the route information is notified to the originating terminal.
At this time, it is confirmed that the user requesting the communication quality assurance is a subscriber by referring to the subscriber database.
[0010]
The originating terminal establishes a new connection based on the route information with the destination terminal.
This makes it possible to guarantee the communication quality even in communication based on the network topology in layer 7.
Note that the QoS control means and the subscriber database may be realized by using an existing control agent having a network control function such as Parlay or Jain.
[0011]
A communication system that implements the communication quality assurance method of the present invention includes a network QoS management device connected to a terminal device via a logical network configured with layer 7, and a logical network configured with layer 7 A terminal device connected to the network QoS management device and another terminal device,
The QoS management device receives, from the calling terminal, the IP address of the calling terminal, the logical ID of the called terminal that wants to perform the quality assurance communication, and the information on the requested communication quality assurance, and receives the received logical ID of the called terminal. And sends the obtained IP address of the called terminal to the route calculating means together with the IP address of the calling terminal and the required communication quality assurance information, and sends the calculated route information to the calling terminal. Logical network communication means for sending to the network, path information collection means for collecting path information of the IP network, IP addresses of the originating terminal and destination terminal, required communication quality assurance information, collected in advance by the path information collection means. Route calculation means for calculating a route between terminals capable of guaranteeing the required communication quality in layer 3 from the obtained route information, and a Qo for performing communication quality control on the calculated route. And a control unit, a network interface for connecting to a terminal device,
Physical terminal acquiring means for acquiring an IP address based on a logical ID in addition to means for routing on an existing logical network, and address notifying means for notifying the acquired IP address and required communication quality information And routing communication means for setting a route based on the designated route information and performing communication,
It is characterized by.
[0012]
The QoS management device of the present invention comprises:
It receives the IP address of the calling terminal, the logical ID of the called terminal that wants to perform the quality assurance communication, and the information of the requested communication quality assurance from the calling terminal, and based on the received logical ID of the called terminal, Logical network communication for inquiring about the IP address of the receiving terminal, sending the obtained IP address of the receiving terminal together with the IP address of the calling terminal and the required communication quality assurance information to the route calculating means, and sending the calculated route information to the calling terminal. Means,
Route information collecting means for collecting route information of an IP network;
From the IP addresses of the calling terminal and the called terminal, the required communication quality assurance information, and the path information collected in advance by the path information collecting means, a route between terminals capable of guaranteeing the required communication quality in Layer 3 is calculated. Route calculation means to
QoS control means for performing communication quality control on the calculated route;
A network interface for connecting to the terminal device;
It is characterized by having.
[0013]
A terminal device according to the present invention includes, in addition to a means for routing on an existing logical network, a physical address obtaining means for obtaining an IP address based on a logical ID, and an address for notifying the obtained IP address and required communication quality information. It is characterized by comprising a notifying unit and a route designation communication unit for setting a route based on designated route information and performing communication.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an embodiment of a network QoS management device and a terminal device used in a communication quality assurance method and system for guaranteeing communication quality of communication between terminal devices in a logical network constituted by layer 7 defined by an OSI reference model. Show.
This example targets JXTA, an IP network, which is a P2P platform.
[0015]
The network QoS management device 1 of this example includes a network interface 11 for controlling a terminal device, a subscriber database 12, a logical network (JXTA) communication unit 13, an IP network route information acquisition unit 14, a QoS control Means 15 and a route calculation means 16.
[0016]
In this example, the terminal device 2, which is a JXTA peer, includes a logical network configuration basic part 20 (JXTA Core) for routing on a logical network in order to enable the communication quality assurance according to the present invention to be executed. Communication function part, Peer Group, Peer Pipes, Peer Monitoring, and Security, as well as means for executing the communication quality assurance of the present invention, a routing communication means 21, a physical address acquisition means 22, an address notification Means 23 is added.
[0017]
FIG. 2 shows an operation sequence of the communication quality assurance method of the present invention. It is clear that service discovery has been performed in advance, and it is clear that communication between peers A and B for service enjoyment is desired. And, on the user's side, it requests communication that guarantees real-time performance. At this time, the IP address of the peer A is acquired from the physical address acquisition means 22 added to the JXTA Core of the peer A, and the acquired IP address and the logical network ID of the destination node to perform quality assurance communication (in this example, JXTA- ID, in this case, "Peer B") to the QoS management apparatus having a function as a control agent CA which is a rendezvous (Rendezvous) on the JXTA network together with the quality assurance level information required for the communication by the address notifying means 23. Notice. The IP packet notified at this time has the packet format shown in FIG.
[0018]
The QoS management device sends the received IP address of the originating terminal and the requested communication quality level information to the route calculation unit 16 by the logical network communication unit 13 and, based on the received logical ID of the peer B via the JXTA network. Then, peer B is inquired about its IP address, and peer B acquires its own IP address from added physical address acquiring means 22 and sends it to route calculating means 16. The route calculation means 16 is used for the communication based on the IP addresses of the originating peer A and the destination peer B, the required level of quality assurance of the communication, and the route information collected by the route information collecting means 14 in advance. The optimum route in the IP network is calculated by the route calculation means 16.
[0019]
At the time of this calculation, for example, when the network is small and the route information collecting unit 14 can easily grasp the topology of the entire network, the route in the layer 3 optimal from all the routes is calculated by the route calculating unit 16, The route is notified to the peer A, and the QoS control means 15 performs communication quality assurance on the route.
[0020]
If the network becomes large-scale and it is difficult for the route information collecting unit 14 to grasp the topology of the entire network, the route information collecting unit or the route information collecting unit is managed as a default route for routing in the IP network. The high-layer switch is designated, and the path information collection means or the high-layer switch relays the communication of the JXTA network. By performing the relay, the route information collecting unit can easily grasp what route the communication of the JXTA network passes in the IP network. If the routes can be grasped, the route calculation means calculates an optimum route from those routes, and the QoS control means performs communication quality assurance on the route.
[0021]
Another method for realizing a large-scale system is to exchange individual IP addresses between terminals, mutually check a route in TCP / IP using, for example, a trace route, and obtain information on the route. Are exchanged, and the QoS control unit notifies the QoS control unit of the route information obtained by the route calculation unit from the result, so that the QoS control unit can guarantee the communication quality for the corresponding route.
[0022]
The peer A on the client side, having obtained the route information for which the communication quality has been guaranteed by the above-described method, creates a pipe as a new transfer route in the JXTA network based on the information. Normally, the pipe relays Relay / Rendezvous having a direct connection relationship with the peer A on the JXTA network, and is connected to the target peer B. At this time, on the IP network, the source address of the packet is Peer A, and the destination address is Relay / Rendezvous, which has a direct connection relationship. On the IP network, the transfer of the session is repeated a plurality of times. To the peer B, the peer that has obtained the route information from the route calculation means creates a pipe according to the route information. This pipe has a direct connection on the JXTA network that does not relay anything to the destination peer, and has a direct session between peers on the IP network.
[0023]
In a large-scale network, when a route information collecting unit or a high-layer switch managed by the route information collecting unit is relayed only once and connected to a target peer, in a JXTA network, the route information collecting unit or the high-layer Via the switch, in the TCP / IP layer, the session is relayed by a CA or a higher layer switch and connected.
[0024]
In the case of a large-scale but not relaying path information collecting means or a high-layer switch under the control of the path information collecting means, peers measure a path in layer 3 and notify the CA to the JXTA network. The above creates a direct pipe that does not relay anything. This pipe can be created simply by specifying the destination address in the TCP network in detail.
[0025]
As a result, the redundancy of routing at Layer 3 is greatly reduced, and the route to be clarified makes it possible to perform QoS control.
[0026]
Regarding the QoS guarantee described above, in this embodiment, the Admission Control control in Diffserv over MPLS is performed at the time of route calculation. However, the present invention does not limit the QoS guarantee method to Diffserv over MPLS, but can use various QoS guarantee methods in cooperation with the Admission Control.
[0027]
Note that the QoS control means and the subscriber database of the QoS management device described above use the QoS management function of performing the Admission Control for the Open API such as Parlay and Jain and the relay node of the layer 3 or lower such as the router in the IP network. Existing control agents that perform network control management of the network can be substituted.
[0028]
As described above, the procedure of the communication quality assurance method of the present invention and the functions of the QoS management apparatus and the terminal device used in the method have been described. However, these procedures or functions can be executed or realized by a computer. The present invention also provides a computer program for executing or realizing the processing procedure or function described above, and a recording medium on which the program is recorded.
[0029]
【The invention's effect】
According to the present invention, it is possible to guarantee the communication quality in layer 3 based on the logical address of the terminal that wants to perform the quality assurance communication. Therefore, it is possible to guarantee the communication quality even in the communication on the logical network. become.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a network QoS management device and a terminal device used in a communication quality assurance method for guaranteeing communication quality of communication between terminal devices in a logical network configured by a layer 7 defined by an OSI reference model. FIG.
FIG. 2 is a diagram showing an operation sequence of the communication quality assurance method of the present invention.
FIG. 3 is a diagram showing a packet format used in the communication quality assurance method of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 QoS management apparatus 11 Network interface 12 Subscriber database 13 Logical network communication means 14 Route information collection means 15 QoS control means 16 Route calculation means 2 Terminal device 21 Route designation communication means 22 Physical address acquisition means 23 Address notification means

Claims (10)

A communication quality assurance method for assuring communication quality of communication between terminal devices in communication of a logical network, comprising: a network connected to a terminal device via a logical network including a layer 7 defined by an OSI reference model. The QoS management device has a logical network communication function that operates as a relay node or a node of the logical network configured by the layer 7, and each terminal performs a routing on the logical network. It has a function of performing communication and a function of notifying the IP address of the terminal to the QoS management device,
The originating terminal device notifies the QoS management device of the logical ID of the destination terminal that wants to perform the quality assurance communication and the information of the requested communication quality assurance together with its own IP address,
The QoS management device queries the IP address of the called terminal based on the logical ID of the called terminal received from the calling terminal, obtains the acquired IP address of the called terminal, the IP address of the called terminal, and the request communication. From the quality assurance information and the route information collected by the route information collecting unit in advance, a route between the terminals capable of guaranteeing the required communication quality in Layer 3 is calculated by the route calculating unit, and the calculated route information is transmitted to the calling side. At the same time as notifying the terminal, communication quality assurance control for the route is performed by the QoS control means,
A communication quality assurance method, wherein the calling terminal establishes a connection with the called terminal based on the notified route information. 2. The method according to claim 1, wherein when performing the communication quality assurance, the subscriber database is referred to confirm that the user requesting the communication quality assurance is a subscriber. A communication system for implementing the communication quality assurance method according to claim 1, wherein the network QoS management device is connected to a terminal device via a logical network composed of a layer 7, and a logic composed of a layer 7 is provided. A terminal device connected to the network QoS management device and another terminal device via the network,
The QoS management device receives, from the calling terminal, the IP address of the calling terminal, the logical ID of the called terminal that wants to perform the quality assurance communication, and the information on the requested communication quality assurance, and receives the received logical ID of the called terminal. And sends the obtained IP address of the called terminal to the route calculating means together with the IP address of the calling terminal and the required communication quality assurance information, and sends the calculated route information to the calling terminal. Logical network communication means for sending to the network, path information collection means for collecting path information of the IP network, IP addresses of the originating terminal and destination terminal, required communication quality assurance information, collected in advance by the path information collection means. Route calculation means for calculating a route between terminals capable of guaranteeing the required communication quality in layer 3 from the obtained route information, and a Qo for performing communication quality control on the calculated route. And a control unit, a network interface for connecting to a terminal device,
Physical terminal acquiring means for acquiring an IP address based on a logical ID in addition to means for routing on an existing logical network, and address notifying means for notifying the acquired IP address and required communication quality information And routing communication means for setting a route based on the designated route information and performing communication,
A communication system for guaranteeing the communication quality of communication between terminal devices in the communication of a logical network. A network QoS management device used for the communication quality assurance method according to claim 1,
It receives the IP address of the calling terminal, the logical ID of the called terminal that wants to perform the quality assurance communication, and the information of the requested communication quality assurance from the calling terminal, and based on the received logical ID of the called terminal, Logical network communication for inquiring about the IP address of the receiving terminal, sending the obtained IP address of the receiving terminal together with the IP address of the calling terminal and the required communication quality assurance information to the route calculating means, and sending the calculated route information to the calling terminal. Means,
Route information collecting means for collecting route information of an IP network;
From the IP addresses of the calling terminal and the called terminal, the required communication quality assurance information, and the path information collected in advance by the path information collecting means, a route between terminals capable of guaranteeing the required communication quality in Layer 3 is calculated. Route calculation means to
QoS control means for performing communication quality control on the calculated route;
A network interface for connecting to a terminal device;
A QoS management device comprising: 5. The network QoS management apparatus according to claim 4, further comprising a subscriber database for confirming that the user requesting the quality assurance communication is a subscriber. 6. The network QoS management apparatus according to claim 5, wherein the QoS control means and the subscriber database are replaced with an existing control agent having a network control function such as Parlay and Jain and a subscriber database. 3. A terminal device used for the communication quality assurance method according to claim 1 or 2, further comprising: a physical address acquisition unit for acquiring an IP address based on a logical ID, in addition to a routing unit on an existing logical network. A terminal device comprising: an address notifying unit for notifying an acquired IP address and required communication quality information; and a route designation communication unit for setting a route based on designated route information and performing communication. In the computer provided in the network QoS management device,
Receiving, from the originating terminal, the logical ID of the destination terminal that wants to perform the quality assurance communication and the information of the requested communication quality assurance together with the IP address of the terminal itself;
Querying the IP address of the called terminal based on the received logical ID of the called terminal;
Collecting IP network route information from the route information collecting means;
From the obtained IP address of the called terminal, the IP address of the calling terminal received from the calling terminal, the required communication quality assurance information, and the route information collected from the route information collecting means, the required communication quality in Layer 3 is obtained. Calculating a route between the terminals that can guarantee the
Performing communication quality control on the calculated route;
A computer program for realizing a network QoS management device, characterized by executing the following. In the computer provided in the terminal device,
When functioning as the originating terminal, the step of notifying the QoS management apparatus of the IP address of the own terminal, the logical ID of the terminal that wants to perform quality assurance communication, and the required communication quality assurance information, and the step of notifying the path information notified from the QoS management apparatus. Performing a step of setting a route and performing communication based on the
A computer program for executing a step of acquiring an IP address in response to an inquiry from a QoS management device and notifying the QoS management device when functioning as a called terminal. A recording medium on which the computer program according to claim 8 is recorded.

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