JPH05183577A - Packet communication system - Google Patents

Abstract

PURPOSE:To attain the communication without being conscious of a DTE of an opposite party by limiting the condition of matching a protocol between two DTEs for communication to a protocol between one DTE and a network in place of the setting of the condition for the protocol between the two DTEs in packet form communication. CONSTITUTION:Virtual DTEs 2, 3 corresponding to real DTEs 1, 4 one by one are installed in a network 5. The real DTE 1 does not make direct communication with the real DTE 4 being the opposite party but makes communication with a path from the real DTE 1 to the real DTE 4 through the virtual DTEs 2, 3. It is possible for the real DTE 1 to make communication with the real DTE 4 without being conscious of the number and the protocol of the DTE 4 by using the virtual DTEs 2, 3 for the number and protocol conversion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to packet type communication, and more particularly to packet communication for realizing additional services other than transparent data transfer.

[0002]

2. Description of the Related Art In a conventional packet switching system, a packet type terminal (hereinafter referred to as DTE) is intended to provide a logical communication path (VC) with a DTE of a communication partner. There is. Therefore, the communication protocol (hereinafter, referred to as protocol) with the DTE on the other side is the DTE.
A method of permitting communication in a negotiation between the two people is being oriented. Therefore, communication between DTEs of different protocols and matters negotiated between the network and DTE, such as DT
It was a system in which a change in a number or the like that takes E into consideration necessarily affects the DTE. In other words, the address as a DTE-aware number needs to define a number uniquely determined with the DTE trying to communicate with the network. Therefore, if the number is changed due to network reasons, another D that communicates with the changed DTE
It is necessary to change the DTE address of the other party with the TE. Further, if the layer 3 protocols included in the DTEs are completely different, or if the individual service levels are different, communication cannot be performed.
Furthermore, regarding the protocols of layer 4 and above, the same points as the above-mentioned items are mentioned as problems.

[0003]

The problem to be solved is that when the DTE of the partner side is moved or the type of the DTE of the partner side is changed, the DTE must be changed.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, virtual DTEs are arranged in a network, and protocols are aggregated only in an arrangement between individual DTEs and the network, so that DTEs who are trying to communicate with each other can communicate with each other. It has the feature of minimizing changes.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing a model for realizing a packet communication system using a virtual DTE according to the present invention. In FIG. 1, 1 is a real DTE, 2 is a virtual DTE, and 3 is a virtual DT.
E, 4 are actual DTEs, 5 is a network. Virtual DTEs corresponding one-to-one in the network 5 to the real DTEs 1 and 4 existing outside the network 5.
Install a few. The real DTE 1 does not directly communicate with the real DTE 4, but the protocols are matched so that the real DTE 4 communicates with each other through the virtual DTEs 2 and 3.

FIG. 2 is an explanatory diagram showing an example of the number conversion supplementary service according to this method. In FIG. 2, the DT of the communication source
The E address has not changed in the real DTE4. As shown in FIG. 2, the numbers x and y are numbers different from the numbers in the network, and the virtual DTEs 2 and 3 change the real DTE number to the virtual DTE number in the network.

[0007]

As described above, the present invention is based on the virtual DT.
By installing E in a one-to-one correspondence with the real DTE in the network, there is an advantage that the real DTE can communicate without being aware of the DTE number or protocol of the communication partner.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a model for realizing a packet communication system using a virtual DTE according to the present invention.

FIG. 2 is an explanatory diagram showing an example of a number conversion supplementary service according to the present method.

[Explanation of symbols]

 1,4 Real DTE 2,3 Virtual DTE 5 Network

Claims (3)

[Claims] 1. A packet communication system comprising a plurality of real terminals in the form of packets and a network connecting the real terminals, wherein the network comprises a plurality of virtual terminals and communication protocols. 2. The packet communication system according to claim 1, wherein the plurality of virtual terminals provided in the network are provided in one-to-one correspondence with the real terminals. 3. The virtual terminal is configured to match the protocol with the corresponding real terminal.
Packet communication method described.