JPS61169041A - Communication method within same node station of line exchange type network - Google Patents

Abstract

PURPOSE:To attain communication between two terminal devices in a station by providing separately a terminal device registers corresponding to reception and transmission respectively to each node station of a line exchange type loop network to use two channels of a transmission frame. CONSTITUTION:Plural stations 2a-2C are connected to a transmission line 1 of the line exchange type loop network, terminal devices 3a,3b are connected to the station 2a and a terminal device 3c is connected to the station 2b. In using channels (m, n) of the transmission frame by the terminal devices 3a,3b connected to the said station 2a to attain communication, a reception terminal device register (a) and a transmission terminal device register (b) are used separately. Then one terminal device 3a receives data of the channel (m), writes transmitted data to the channel (n), the other terminal device 3b receives data of the channel (n), the transmitted data is written on the channel (m) to attain the communication between the terminal devices 3a and 3b in the same station 2a.

Description

[Detailed Description of the Invention] [Background and Objectives of the Invention] The present invention relates to a communication method within the same node station in a circuit-switched network, and particularly relates to a communication method within the same node station in a circuit-switched network. −
The present invention relates to a method for communicating within the same node station in a circuit-switched network suitable for enabling communication within the node station.

FIG. 1 is a diagram showing an example of the configuration of a circuit-switched loop network. An example is shown in which three node stations 2a 12b and 2c are connected via transmission path 1, and a terminal is connected to each node station 2a to 2C.
a and 3b, and a terminal 3C is connected to the node station 2b.

Data transmission and reception at each of the node stations 2a to 2c is carried out by going around the loop and transmitting frames 4 between the node stations in the circuit-switched loop network as shown in FIG. When passing through the reception port 5 of , the reception data 7 is sent to the terminal assigned to the corresponding channel n, and then when passing through the transmission port 6, the transmission data 8 is sent to the corresponding channel (n-1). Communication is performed by writing. Here, consider a case where the terminals 3a and 3C connect to different node stations 2a and 2b and communicate.

FIG. 3 is a diagram showing the state of the channel-terminal registers of node stations 2a and 2b when channel n is assigned to this communication, where (a) is the register of node station 2a, and (b) is the register of node station 2a. 2b, channel n is the register of node station 2a.
channel n at the receiving port when passing through the receiving port of
, that is, the terminal 3C of the node station 2b
The data transmitted from the node station 2a is sent to the terminal 3a of the node station 2a, and then, when channel n passes the transmission boat, the data to be transmitted from the terminal 3a to the terminal 3C is written. In the node station 2b, the terminal 3C receives data from the terminal 3a and transmits data to the terminal 3a in the same way as the node station 2a. In this way, terminals 3a and 3C communicate using channel n.

Next, consider a case where the terminals 3a and 3b connected to the same node station 2a communicate with each other.

In this case, even if channel n is allocated for communication, two terminals cannot access at the same time within the same node station, and communication is impossible. Another possible method is to provide a dedicated bus for communication within the own node station and communicate without using a channel, but this poses the problem of increased hardware.

The present invention has been made in view of the above, and its purpose is to provide line switching that enables communication within the same node station in the same manner as communication between different node stations without complicating the hardware. - To provide a communication method within the same node station of a network.

[Summary of the Invention] A feature of the present invention is that each node station of a circuit-switched loop network is provided with separate terminal number registers corresponding to receiving and transmitting channels, and two
The point is that communication can be performed between two terminals within the same node station using two channels.

[Example] An example of the method of the present invention will be described in detail below with reference to FIG.

FIG. 4 illustrates an embodiment of the communication method within the same node station in a circuit-switched network according to the present invention.Receiving terminal register and transmitting terminal when two terminals connected to a node station communicate with each other. 2 is a diagram showing the state of the registers, and shows a case where the terminals 3a and 3b in FIG. 1 communicate using channels m and n of the transmission frame; (a) shows the receiving terminal register;
(b) is a transmitting terminal register.

As mentioned above, in the communication within the own node station, 1
Communication cannot be achieved by simply allocating one channel, so it is necessary to allocate two channels. by the way,
To perform intra-station communication using two channels m and n, terminal 3a receives data on channel m and writes data to be transmitted on channel n. Furthermore, the terminal 3b receives data on channel n, and writes data to be transmitted on channel m. In this way, by using channel m in one direction from terminal 3b to terminal 3a and channel n from terminal 3a to terminal 3b, communication within the same node station becomes possible. However, in this case, the register configuration as shown in FIG. 3 is unsuitable, and as shown in FIG. 4, registers that can be managed separately for the receiving terminal and the transmitting terminal are required.

In the register configuration shown in Fig. 4, when communicating between different node stations using channel n, the first row is
Node station 2a ke ciao.

For the node station 2b, write terminal 3a for both reception and transmission in channel n, and write terminal 3c for both reception and transmission in node station 2b.

As described above, according to the embodiments of the present invention, communication between different node stations and communication within the same node station can be performed using the same hardware.

[Effects of the Invention] As explained above, according to the present invention, communication within the same node station can be made possible in the same manner as communication between different node stations without complicating the hardware. There is.

[Brief explanation of drawings]

Figure 1 is a diagram showing an example of the configuration of a circuit-switched loop network, Figure 2 is a diagram showing channel access at a node station in a circuit-switched loop network, and Figure 3 is a case of communication between different node stations. Figure 4 shows the registers at each node station.
The figure shows the state of the receiving terminal register and the transmitting terminal register when two terminals connected to the same node station communicate, for explaining an embodiment of the communication method within the same node station in a circuit-switched network according to the present invention. FIG. 1...Transmission path, 2a to 2C...Node station, 3a to 3C...Terminal, 4...
...Transmission frame, 5...Reception boat, 6...
...Sending boat.

Claims (1)

[Claims] (1) Communication between terminals of each node station is enabled by dividing a transmission frame into a plurality of channels and assigning each channel to a terminal of each node station of a circuit-switched loop network. For receiving each node station,
A separate channel-compatible terminal number register for transmission is provided,
A communication method within the same node station in a circuit-switched network, characterized in that two channels of the transmission frame are used to perform communication between two terminals within the same node station.