JPS63185252A - Traffic control communication system utilizing packet switched network - Google Patents

Abstract

PURPOSE:To assign a physical channel to a specific call which has an urgent message by providing a data terminal with a priority control part, a command processing part, and plural channel processing parts connected thereto. CONSTITUTION:A packet procedure control part 1 takes user data out and sends it out to the priority control part 2. The priority control part 2 compares pieces of information on two logic channels with each other, and instructs a priority control part 3 to interrupt temporarily a communication with communication opposite terminals of logic channels which do not require emergency at the time of deciding that some channel needs to receive data preferentially. The temporary interruption command is sent to a corresponding channel processing part through the command processing part 4 of a transmitting terminal and this channel processing part interrupts the transmission of data temporarily according to the interruption command.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a data communication system using a packet-switched network, and more particularly to a control system for allocating physical channels preferentially to specific calls.

BACKGROUND OF THE INVENTION Conventionally, data communication systems using this type of packet-switched network have been configured to transmit packet-level control information via packet-level control information.
Data was prioritized within the network. That is, as shown in FIG. 2, a plurality of data terminals 11, 12, 13, etc. are connected to a packet switching network 20.
Messages were divided into packets of a certain length (for example, 1000 bits) and transferred via a storage/switching device, and priority processing was performed according to specifications from the sending terminal. In FIG. 1, the conventional data terminal has a priority determining section 2. Priority control unit 3. Command processing section 4
The packet procedure control unit 1 is directly connected to the multiple channel processing units 5 and 6, and the receiving terminal is unable to allocate a physical channel to a specific call at its own discretion, There was a drawback that it was defective.

Problems to be Solved by the Invention The purpose of the present invention is to utilize a packet-switched network that completely solves the above-mentioned drawback, namely, the inability of the receiving terminal to allocate a physical channel to a specific call with an urgent message. The purpose of the present invention is to provide a traffic control communication system that provides a high level of traffic control.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a data terminal with a packet procedure control section, a priority determination section, a priority control section, and a command processing section connected to the packet procedure control section. In addition, a configuration including a plurality of channel processing units connected to the priority determination unit and the command processing unit is adopted.

Operation Since the present invention is constructed as described above, when receiving data, the packet procedure control section extracts user data and sends it to the priority determination section. The priority determination unit compares information on a plurality of logical channels, and when there is no need to give priority to one or the other, it allocates information to each logical channel as in the past.

However, if it is determined that data on one of the channels needs to be received preferentially, the priority control unit is notified of temporary communication interruption to the communication partner terminal on the logical channel that does not require an emergency. Then, the priority control unit sends a command to temporarily stop data transmission to the other sending terminal as user data, and the other sending terminal receives this command and sends it to the corresponding channel processing unit via its own command processing unit. Notify and interrupt data transmission. Therefore, only data from the other party with priority is sent.

Also, regarding canceling the temporary suspension of data transmission, the priority determination unit detects the end of communication of priority data, and the priority control unit sends an interruption cancellation command to the other party's terminal. and notifies the corresponding channel processing unit via its own command processing unit,
The channel processing unit resumes data transmission.

Example Next, embodiments of the present invention will be described with reference to the drawings.

Referring to the second cap showing the communication method system of the present invention,
In the communication method using the packet switching network of the present invention, a data terminal 13 having one physical channel is connected to a data terminal 1
Two logical channels are set up simultaneously for data terminal 1 and data terminal 12, and data is received from both.

Next, to describe the configuration of the embodiment of the data terminal according to the present invention, as shown in FIG.
and A and H channel processing units 5 and 6. It controls each packet procedure and sends and receives user data. Since the present invention has this feature when receiving data, the operation when receiving data will be described below.

The packet procedure control unit 1 extracts user data and sends it to the priority determination unit 2. The priority determination unit 2 compares the information on the two logical channels, and if there is no need to give priority to one in particular, this information is simply distributed to each logical channel and processed by the A channel processing unit 5 or the B channel processing. Pass it to Department 6. However, if it is determined that one of the channels needs to receive data preferentially, the priority control unit instructs the communication partner terminal of the non-urgent logical channel to temporarily suspend communication. 3 to that effect. The priority control unit 3 sends a data transmission temporary stop command to the sending terminal as user data. This data transmission suspension command is notified to the corresponding channel processing unit via the command processing unit 4 on the sending terminal side, and this channel processing unit temporarily suspends data transmission in accordance with the suspension command. In this case, priority determination unit 2
Regarding priority determination, there is a method in which the priority is explicitly designated on the user data from the transmitting terminal side and the determination is made based on that, but the priority determining section 2 on the receiving terminal side uses its own determination criteria. may have.

To cancel the temporary suspension of data transmission, the priority determination unit 2 detects the end of communication of the priority data, notifies the priority control unit 3 of this, and the priority control unit 3 issues an interruption cancellation command to the other terminal. Send. On the other party's terminal side, the interruption release command is sent to the packet procedure control unit 1. A notification is sent to the channel processing unit processing the channel through all the command processing units 4, and the channel processing unit resumes transmission on the channel in accordance with the interruption release command.

In this embodiment, the channel processing section is A.

Although 82 pieces are shown, the same applies to the case of three or more pieces.

Effects of the Invention As explained above, according to the present invention, a data terminal checks the contents of received user data and compares the priority with other user data being communicated simultaneously using the same physical channel. and means for generating a command to notify data terminals communicating on other logical channels of temporary communication interruption when it is determined by this means that a particular call should be received preferentially; By providing a means for temporarily interrupting data transmission upon reception of a command, it is possible to make decisions on the receiving terminal side and allocate the capacity of the physical channel of the data terminal to a specific call.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a data terminal according to an embodiment of the present invention;
FIG. 2 is a system diagram of a data communication method using a packet switching network. 1...Packet hand J@control unit, 2...
Priority determination unit, 3...Priority control unit, 4...
・Command processing section, 5...A channel processing section,
6...B channel processing section, 10.11, 12.
13・′°・Pateta terminal.

Claims (1)

[Claims] In a data communication system in which a plurality of data terminals each having a packet procedure control unit and a plurality of channel processing units connected thereto are connected to a packet switching network, the data terminal is connected to the packet procedure control unit. A priority determination unit that checks the contents of the received user data and compares the priority with other concurrently communicating user data using the same physical channel, and this priority determination unit determines whether a specific call is received preferentially. a priority control unit that generates a command to request a temporary interruption of communication to the data terminal of the other party communicating on the logical channel during another simultaneous call, if it is determined that the communication should be interrupted;
A command processing section that temporarily interrupts data transmission upon reception of a command from the other party is provided, and the outputs of the priority determination section and the command processing section are input to the plurality of channel processing sections. A traffic control communication method that uses a packet-switched network.