JPS61152136A - Method for accomodating terminal with high speed - Google Patents

Abstract

PURPOSE:To assign a necessary containable time slot to a terminal and to execute the processing of a busy state, etc., by inputting a command to a center station from a high speed terminal and retrieving the idle time slot of a primary multiplex circuit used by other nodes through the station. CONSTITUTION:The center station 1 of a high speed terminal containing system controls the entire system, and nodes 2 and 7 connect a low speed terminal 3, the high speed terminal 8 with the station 1. When a high speed data is transmitted from the terminal 8 of the system, the prescribed command from a terminal 8 is inputted to the station 1 through the primary multiplex circuit 4, and the station 1 retrieves necessary idle time slots to assign a11, a12- on a secondary multiplex circuit 5 to the terminal 8. The time slots a11, a12- transmit the high speed data from the terminal 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for accommodating high-speed terminals in a high-speed bus line or high-speed loop line system.

[Conventional technology]

Conventionally, this type of terminal accommodating method is configured to accommodate terminals whose speed is sufficiently lower than the speed of the primary multiplex line.

In the *th episode, we show a block system to explain the conventional edge-unaccommodated method. In FIG. 3, 1 is a center station that controls the system, 2 is a node that connects each terminal to center station 1, 3 is a low-speed terminal that is connected to node 2, and 4 is a primary node that connects low-speed terminal 3 and node 2. A multiplex line 5 is a secondary multiplex line for further multiplexing the data of the primary multiplex line, and 6 is a high-speed line connecting the center stations.

Next, a conventional terminal accommodation method will be explained using FIGS. 3 and 4. The node 2 accommodates data only for the primary multiplex line 4, and these data are further multiplexed onto the secondary multiplex line 5. FIG. 4 shows the state of the transmitted signal. In Figure 4, four primary multiplex lines are in time slots A and B.
, C, and D on the secondary multiplex line in the order, and data of one low-speed terminal is multiplexed in the order of time slots al and a2.

[Problem that the invention seeks to solve]

In such a system, in addition to accommodating low-speed terminals, there is a method of accommodating terminals that are faster than the primary multiplex line speed on the high-speed bus or high-speed loop by making slight hardware and software changes. It had been requested.

[Means for solving problems]

In order to meet such demands, the present invention accommodates primary multiplex lines in nodes as basic multiplex lines.

In a system in which a high-speed terminal is connected to an arbitrary node and the nodes are connected using a secondary multiplex line, which is a stack of primary multiplex lines, and terminal data is guided to the center station, commands from the high-speed terminal to the center station are used. When the node is activated, an empty time slot in the primary multiplex line being used by another node is searched for, and the necessary time slot to accommodate the high-speed terminal is allocated to the high-speed terminal.

[Effect]

In the present invention, empty time slots are searched by the center station and the required time slots are allocated to high speed terminals.

〔Example〕

FIG. 1 shows a block system for explaining an embodiment of the high-speed terminal accommodation method according to the present invention. In Figure 1,
7 is a node having hardware equipped with memory that can access all primary multiplex lines, and 8 is a high-speed terminal.

Next, an embodiment of the high-speed terminal accommodating method according to the present invention will be described with reference to FIGS. 1 and 2. When the high-speed terminal 8 transmits high-speed data, a predetermined command is input from the high-speed terminal 8 to the center station 1. When the command is input, the center station 1 searches for an empty time slot and allocates the required time slot on the secondary multiplex line to the high speed terminal 8. FIG. 2 shows the allocation of time slots. Data from the high-speed terminal 8 is placed in the empty time slot a11°a12.
a13. A14 is assigned to enable high-speed transmission. When a command is input from the high-speed terminal 8, time slots that are in use are treated as busy or the like.

〔Effect of the invention〕

As explained above, the present invention enables a command input from a high-speed terminal housed in an arbitrary node to a center station to search for an empty time slot in a primary multiplex line being used by another node, and to accommodate the vacant time slot. By allocating the necessary time slots to high-speed terminals, in a system that sends data from terminals, data on a CRT display, etc. can be transmitted by simply making slight changes to the hardware at the nodes and the software at the center station. This has the effect of allowing high-speed data, such as , to be sent preferentially with some restrictions placed on other communications.

[Brief explanation of drawings]

FIG. 1 is a block system diagram for explaining an embodiment of the high-speed terminal accommodating method according to the present invention, FIG. 2 is a time slot diagram thereof, and FIG. 3 is a block system diagram for explaining the conventional terminal accommodating method. FIG. 4 is a time slot diagram thereof. 1... Center station, 2, 7... Node, 3... Low speed terminal, 4... Primary multiplex line, 5...
...Secondary multiplex line, 6...High speed line, 8...
high speed terminal.

Claims (1)

[Claims] A primary multiplex line is accommodated in a node as a basic multiplex line, a high-speed terminal is accommodated in any node among the nodes, and the nodes are connected to each other using a secondary multiplex line, which is a stack of the primary multiplex lines, to provide a terminal. In a high-speed terminal accommodating method that leads data to a center station, by inputting a command from the high-speed terminal to the center station, the center station can search for and accommodate empty time slots in the primary multiplex line being used by other nodes. 1. A method for accommodating high-speed terminals, which comprises allocating necessary time slots to the high-speed terminals, and taking measures such as setting busy time slots to the high-speed terminals.