JPH0568049A - Priority transmission processing system - Google Patents

Abstract

PURPOSE:To reduce a data transmission time by connecting a call with higher priority with a path of a short distance without selecting a 2nd path or a 3rd path or the like whose transmission distance is longer. CONSTITUTION:An operating state (an operating rate and a call to be connected with high priority) of each of relay lines 41,42,43 is stored in call control memories 31,32,33 of data exchanges 11,12,13. A terminal equipment 22 sends a call packet including a high priority designation signal to a terminal equipment 24. The data exchange 11 compares the priority added by the caller terminal equipment 22 with the operating state of the relay line 41 making a connection request for each call based on a rate table of the call control memory 31 and when the priority of the terminal equipment 22 is high and the relay line 41 is in congestion, the data exchange 11 bypasses automatically a call communicated between the terminal equipment 21,23 with low priority to the relay line 42 to connect the terminal equipment 22,24 having a call with high priority through the relay line 41 of a shortest distance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to priority transmission processing, and more particularly to a method for automatically diverting a low-priority communication call depending on the use condition of a trunk line and allowing a high-priority call communication in the shortest distance.

[0002]

2. Description of the Related Art Conventional prioritized transmission processing has been a method of selecting a usable relay line and transmitting data having a higher priority among them.

[0003]

In this conventional prioritized transmission process, a priority queue is provided in the relay line, stored in the priority queue corresponding to the priority order, and the data with the higher priority order is sent out. However, even if the call has a high priority, it is a priority transmission within a usable trunk line, and it has been difficult to transmit data in the shortest distance. Therefore, the transmission time could not be shortened even in the case of emergency data transmission. Further, if there is no trunk line that can be used, there is a problem that even a call with a high priority cannot be accepted.

An object of the present invention is to provide a priority transmission processing method for automatically diverting a low-priority call during communication to another low-priority trunk line during congestion of the trunk line and transmitting a high-priority call at the shortest distance. To provide.

[0005]

According to the priority transmission processing method of the present invention, in a data exchange network composed of a plurality of data exchanges, the data exchanges relay the priority and the relay added by the calling terminal for each call. When the trunk line that the calling terminal requested to connect is congested, the communication status lower than the priority of the calling terminal is automatically detoured to another trunk line by comparing the line usage status. Connect high priority calls with the shortest distance.

[0006]

The present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention in a data exchange network.

The terminal devices 21, 22 and the terminal device 23,
Data exchanges 11 and 13 accommodating 24 respectively
Is connected via the trunk line 41 and the trunk line 4
2, the data exchange 12 and the relay line 43 are connected. The data exchanges 11, 12, and 13 are provided with call control memories 31, 32, and 33 for storing route tables, respectively.

The terminal device 21 transmits a calling packet including a low priority designation signal to the terminal device 23. The data exchange 11 checks the usage status of the trunk line 41, which is the first route for the terminal device 23, from the route table of the call control memory 31, updates the usage status of the trunk line 41, and performs low-priority communication. Call control memory 31
Then, the calling packet is transmitted to the data exchange 13 via the relay line 41.

Upon receiving the call packet, the data exchange 13 connects the terminal device 23 to the terminal device 21, updates the usage status of the trunk line 41 in the call control memory 33, and is of low priority communication. To store.

Next, the terminal device 22 transmits a calling packet including a high priority designation signal to the terminal device 24.
The data exchange 11 checks the route table of the call control memory 31 for the usage status of the trunk line 41, which is the first direction for the terminal device 24, and when the trunk line 41 is in a congestion state and unusable, the terminal device 22 It is checked whether there is a call in communication lower than the priority designation added to the calling packet of. The data exchange 11 is the terminal device 2
1 and the terminal device 23 are in communication, the call disconnection packet for disconnecting the communication between the terminal device 21 and the terminal device 23 is sent to the data exchange 13, and the terminal device 24 is connected. A calling packet including a high-priority designating signal is sent via the trunk line 41. At the same time, a calling packet to which the low priority designation signal for the terminal device 23 accommodated in the data exchange 13 is added is sent to the data exchange 12, and the call control memory 31 stores that fact. The data exchange 12 and the data exchange 13 are
When the call packet or the call disconnect packet is received, the data exchange 12 stores the usage statuses of the trunk lines 42 and 43 in the call control memory 32, and the data switch 13 calls the usage statuses of the trunk lines 41 and 43. Stored in the control memory 33.

[0012]

As described above, according to the present invention, the priority level added by the calling terminal for each call is compared with the usage status of the trunk line, and the trunk line requested by the calling terminal When there is congestion, calls that are lower than the calling terminal's priority are automatically routed to other trunk lines, so calls with higher priority can be used for the second route or the second route with a longer transmission distance. It is possible to connect in the shortest distance without choosing 3 routes. Therefore, the data transmission time can be shortened.

[Brief description of drawings]

FIG. 1 is a relay system diagram showing an embodiment of the present invention.

[Explanation of Codes] 11, 12, 13 Data Switch 21, 22, 23, 24 Terminal Device 31, 32, 33 Call Control Memory 41, 42, 43 Relay Line

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04Q 3/66 9076-5K

Claims (1)

[Claims] 1. In a data exchange network composed of a plurality of data exchanges, the data exchange compares the priority order added by the caller side terminal for each call and the usage status of the trunk line, and the caller side terminal is compared. When the trunk line that has requested connection is congested, it is possible to automatically divert a call that is lower than the priority of the calling terminal to another trunk line and connect the call with a higher priority in the shortest distance. Characteristic priority transmission processing method.