JPS6135643A - Loop network system - Google Patents

Abstract

PURPOSE:To make uniform a load and to improve the transmission efficiency by controlling a queue between a terminal device and a station at each call of line connection from the terminal device in a system having right and left system loops. CONSTITUTION:A data transmitted from a terminal device 10 is received by a data input section 60 and a call of line connection request is outputted at the same time and information setting the weight of a queue is acquired from a supervisor 70. Further, a data quantity in the queue is acquired from a processing circuit. A queue weight setting circuit 30 sets respective weight of the right and left system loops based on the acquired information. A switching discrimination circuit 40 discriminates whether or not it is connected to queue processing circuits 21, 22 of left or right systems based on the weight of quene and the connection is attained by a line control circuit 50.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a loop network that can be used to connect lines between terminals and stations in a packet switching system of a loop network system having left-handed and left-handed systems. This relates to system routing control.

Conventional configuration and its problems A loop network system consists of a station that controls the loop and terminals, and various terminals.
The stations are connected by full-duplex lines. For example, it is as shown in FIG.

In Figure 1, stations 1 to 4 are left loop 1
01 and is connected by a left-handed loop 102. In addition, terminals 11 to 18 are connected to each station. Therefore, in this loop network system, when performing packet exchange data transmission from terminal to terminal (for example, from terminal 11 to terminal in FIG. 16), it is necessary to decide whether to perform data transmission between stations in the left loop or in the left loop. The determination methods include one based on the terminal number (referred to as method A) and one based on the station number (referred to as method B).

Data transmission between terminals according to method A is configured as shown in FIG. In FIG. 2, terminal numbers are individually assigned in advance to various packet switching terminals 10. Therefore, when transmitting data from a terminal, the terminal number is also transmitted. The data sent from the terminal is sent to the queue processing circuit 20 in the stage engine 5.
At the same time, a line connection request call is issued to the destination terminal.

Then, when the line-unconnected call returns, the packet data is transmitted from the queue processing circuit to the line connection section 80 in the station. The packet data sent to the line connection section is transferred to the packet switching system C in the station.
Based on the terminal number, the PU (referred to as PAD-CPU) determines whether to connect to the left system loosely or to the left system loosely. That is, P determines in advance whether it is a left-handed terminal or a left-handed terminal based on the terminal number.
It is determined by the AD-CPU.

According to this method, when looking at the entire loop, it is conceivable that the load will be biased toward the left loop or the left loop. - For example, if the left-handed terminal is not powered on or data is being transmitted only from the left-handed terminal, the load of the left-handed loose device will be very large, and the overall transmission efficiency will be , will decrease. Also,
In the case of method A, since the queue processing circuit contains both left and right packet data, it is difficult to grasp the load placed on each of the left and right loops.

Furthermore, in Figure 1, data transmission between terminals according to method B is as follows: 'Each station is assigned a station number, and based on that station number, it connects to the left loose, or connects to the left loose. Decide what to do. For example, when transmitting f-even from station 1 to station 3, if the station numbers of stage 1 and station 3 are even numbers, the connection will be made to the left system loose, and if the station numbers are odd, then the connection will be made to the left system loose. It is something.

When method B is used, it is impossible to transmit data from a station with an odd number (even number) to a station with an even number (odd number), and in addition, if the station number is connected to a left-handed stage generator. In cases where only the terminals that are currently in use are being used, the load of left-handed looses becomes extremely large.

As described above, both method A and method B have a problem in that, when viewed from the entire loop, the loads applied to the right and left systems vary greatly.

Furthermore, there is a problem in that it is not possible to select the right or left system for each line connection call from the terminal.

OBJECTS OF THE INVENTION The present invention eliminates such conventional drawbacks and eliminates left-handed loops and left-handed loose loops by controlling queues between terminals and stations for each line connection call from a terminal. This equalizes the load and improves transmission efficiency.

Composition of the Invention The loop network route control system of the present invention has a queue processing circuit for each of the left loop and the left loop, and handles individual queue processing circuits for each call for a connection request for a communication line that transmits data from a terminal to a station. Obtain the queue information in the queue processing circuit and connect it to the queue processing circuit of the left loop, or connect it to the queue processing circuit of the left loop so that the weights of the left and right queues are equal. It is something that connects or controls, and it is possible to select left-handed or left-handed for each call, and from the perspective of the entire loop, the load on the left-handed loop and the load on the left-handed loop can be considered to be the same. be.

DESCRIPTION OF EMBODIMENTS Specific examples of the present invention will be described with reference to the drawings. The loop network route control system of the present invention has a configuration as shown in FIG.

In FIG. 3, consider the case where data is transmitted from the terminal 10'. The data transmitted from the terminal 10' is received by the data input section 60, and a line connection request call is issued at the same time, and information for setting the weight of the queue (for example, left-handed and the line speed of the left-handed loop). Also, the processing circuit obtains the amount of data in the queue. - Here, Sv is something inside the station that monitors the loop status, terminal status, etc.

Based on the obtained information, the queue weight setting circuit 3o
In , the weights of the left-handed loop and the queue of the left-handed loop are set. Here, an example of a queue weight setting circuit is as shown in FIG. Fourth
In the figure, first.

5vyo, the left loop and the line speed of the left loop are obtained in the line acquisition circuits 31 and 32.

Line weight processing circuit 33.3 based on the obtained line speed
4, the left loop and the line weight of the left loop are set. Then, based on the set weight and the queue data amount obtained by the queue data amount acquisition circuit 37, 38, an arithmetic circuit 36.
, set the weight of the queue.

Based on the weight of the queue set by the queue weight setting circuit 30 in this way, the switching judgment circuit 40 connects to the queue processing circuit of the left loop, or connects to the queue processing circuit of the left loop. Decide whether to connect. Based on the determination result, the line control circuit 5o connects to the left loop queue processing circuit or the left loop queue processing circuit.

Here, as an example of the switching judgment circuit, one as shown in FIG. 6 can be considered.

In FIG. 6, based on the weight of each queue obtained by the queue weight setting circuit 3o, an arithmetic circuit (for example, a circuit that averages the weight of the left-hand queue and the weight of the left-hand queue) (Conceivable) In step 41, the weight to be used as a criterion for judgment is determined. Comparison circuits 42 (left-hand system) and 43 (left-hand system) compare the obtained reference weight and the weight of each queue.

As a result of the comparison, the connection/disconnection request circuit 44 (left system) and s 46 (left system) issue a connection request to the one whose queue weight is lighter than the reference weight. Also, for those whose queues are heavier than the standard weight, a disconnection request is issued at 44.45. For example, if the weight of the queue of the right-hand loop is lighter than the weight of the reference queue, then the left-hand connection/disconnection request circuit 46
A multiple connection request is issued, and a connection disconnection request is issued by the left-hand connection/disconnection request circuit 44. Line connection control circuit 46 (left-hand system) based on the connection request and non-connection request issued from the connection/disconnection request circuit and the data input end signal obtained from each queue processing circuit.
, 47 (left system), a line connection signal is sent to the line control circuit 50.

Data connected to the line in the line control circuit 50 is input to the left queue processing circuit 21 or the right queue processing circuit 22, and is sent to the left loop or the left loop.

Here, the left queue processing circuit and the left loop, and the right queue processing circuit and the left loop are connected one-to-one.

Effects of the Invention The present invention provides a left loop and a loop network system having a left loop.

When transmitting cut data, left-handed and left-handed queues are controlled between the terminal and the station.
Therefore, from the perspective of the entire loop, the loads on the left loop and the left loop can be made equal, which greatly contributes to improving the transmission efficiency of the entire loop. In particular, according to the present invention, it is determined whether to connect to the left system loosely or to connect to the left system loosely using the weight information of the left system queue between the terminal and the station and the weight information of the left system queue. Because of this, it is possible to use both left and right loops from one terminal, and when determining whether to connect to the left loop or the left loop, the terminal number and station number are Since it does not require
It is very advantageous.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a loop network system, FIG. 2 is a block diagram of a configuration example of a method for determining whether to connect right-handed loosely or left-handed loosely depending on the terminal number, and FIG. 3 is a block diagram of the present invention. FIG. 4 is a block diagram of a process block diagram of a route control method of a loop network system in one embodiment, and FIG. 6 is a block diagram of a queue weight setting circuit in the same device.
The figure is a block diagram of a switching determination circuit in the same device. 10...Terminal, 21...Left queue processing circuit, 22...Right queue processing circuit, 30.
... Queue weight setting circuit, 40 ... Switching judgment circuit, 60 ... Line control circuit, 60 ...
... Data input section, 70 ... Supervisor, 80 ... Line connection section, 101 ...
・Left-handed loop, 102...Left-handed loop, 6...
····station. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] It is equipped with a plurality of stations connected by a loop network having a right-hand system and a left-hand system, and a plurality of terminals connected to each of the stations, and when making line connections between the terminals and the stations, using queue information. . A loop network system, characterized in that a connection line is determined by performing routing control for each call so as to equalize the loads on both the left and right queues.