JPH04180435A - Priority processing system - Google Patents

Abstract

PURPOSE:To attain the interrupt communication in which a new caller with higher priority interrupts and takes over a current communication with a called terminal equipment in current communication state by comparing priority when a call request comes from other terminal equipment to the terminal equipment in the communication state and connecting the caller terminal equipment with higher priority to the terminal equipment in the communication state automatically. CONSTITUTION:While terminal equipments 21, 22 are busy in communication with low priority, when a terminal equipment 23 sends a call packet including a higher priority designation signal to the terminal equipment 22, a packet exchange 11 sends the packet to a packet exchange 12. Upon the receipt of the packet, an exchange 12 checks a call control memory 32 storing the state of the terminal equipment 22 and compares the communication priority of the terminal equipment 22 with the priority designation signal included in the packet. When it is discriminated that the terminal equipment 23 has higher priority, the exchange sends a message representing tentative stop of the communication with the terminal equipment 22 to the terminal equipment 21 and connects the terminal equipments 23, 22 automatically. Upon the receipt of an interrupt packet, the exchange 12 makes communication between the terminal equipments 21, 22.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a packet switch, and in particular, when a terminal in progress is interrupted by a terminal with a higher priority, the call in progress is suspended. The present invention relates to a priority processing method that automatically communicates with a terminal having a high priority.

[Conventional technology]

Conventionally, this type of priority processing method is a method in which a packet with a higher priority is sent out on a relay line, and communication is not performed by interrupting a terminal that is currently communicating.

[Problem to be solved by the invention]

In the conventional priority processing method described above, a priority queue is set up in the relay line, and data is stored in the priority queue corresponding to the priority.
Since data is sent out from the packet with the highest priority, there is a drawback that no action is taken on terminals that are communicating, and calls cannot be accepted.

SUMMARY OF THE INVENTION An object of the present invention is to provide a priority processing method that temporarily interrupts an active call with a low communication priority, interrupts a call with a high communication priority, and automatically restores the interrupted call after the communication ends. .

[Means to solve the problem]

The priority processing method of the present invention is based on the priority order that the calling terminal adds to each call when a call request is received from another terminal to a terminal that is currently communicating in a packet switch that accommodates subscriber terminals. Compare the priorities of the terminals in communication when making a call, and if the calling terminal has a higher priority, a pause message is sent to both terminals in communication, and the call with the higher priority is automatically terminated. Once connected, the suspended call will be automatically restored after the communication ends.

〔Example〕

Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention in a packet-switched network.

The priority processing method shown in FIG.
2, call processing memories 31, 32, and terminal devices 21, 22 .
23 and a relay line 41.

The terminal device 21 transmits a calling packet including a low priority designation signal to the terminal device 22. Packet switch 11
and 12, upon receiving the response packet from the terminal device 22, sets the state of the terminal device 21 in the call control memory 31 to a low priority communication state and the state of the terminal device 22 in the call control memory 32 to a low priority communication state, Each is in a communicable state.

During low priority communication between the terminal devices 21 and 22, when the terminal bag W23 transmits a calling packet containing a high priority designation signal to the terminal device 22, the packet switch accommodating the terminal device 23 11 is connected to the terminal device 2 via the relay line 41.
Packet exchange I!2 containing I! 12. When the packet exchange 11!12 receives the packet, it checks the call control memory 32 storing the status of the terminal device 22, and determines whether the terminal device M22 is in the communicating state.
The communication priority of the terminal device 23 is compared with the priority designation signal included in the packet from the terminal device 23, and if it is determined that the communication priority of the terminal device 23 is higher, the communication priority of the terminal device 22 with the terminal device 21 is compared. Message to temporarily stop communication and terminal device 2
In addition to transmitting a high-priority interrupt notification from relay port #! , 41 accommodating the terminal device 21 via the packet exchange l! A pause message is sent to 11. When the packet switch 11 receives the temporary stop message, it transmits a message to the terminal device 21 to temporarily stop communication with the terminal device 22, and also communicates the memory state corresponding to the terminal device 21 in the call control memory 31. Pause from inside. When the packet switch 12 receives a response packet from the terminal device 22 to the terminal device 23, the packet switch 12 sets the memory state corresponding to the terminal bag 222 in the call control memory 32 to a temporary state between the terminal device 21 and the terminal device 23. It stores in the memory area that communication is a high-priority communication between
1 to the packet switch 11. When the packet switch 11 receives the response packet from the terminal device 22, the packet switch 11 stores the response packet from the terminal device 23 in the call control memory 31.
It stores in the corresponding memory that the communication with the terminal device 22 is a high-priority communication and sets the communication state, and also transmits a response packet to the terminal device 23 to set the communication enabled state.

When the packet switch 11 receives a disconnect packet from the terminal device 23 that terminates the communication between the terminal devices 23 and 22, it makes the memory state corresponding to the terminal device 23 in the call control memory 31 empty, and sends the disconnect packet to the packet switch 12. do. When the packet switch 12 receives the disconnection packet, the packet switch 12 returns the memory state corresponding to the terminal device 22 in the call control memory 32 to the empty state with the terminal device 23 and the communicating state with the terminal device 121, and returns the memory state corresponding to the terminal device 22 to the communication state with the terminal device 121. At the same time, the terminal equipment 21 and 22 are notified to the packet switch 11.
send a message to resume communication.

When the packet switch 11 receives the resume message, it returns the memory state corresponding to the terminal bag M21 in the call control memory 31 from the suspended state to the communicating state, and also
A message for restarting communication with the terminal device 22 is communicated to the terminal device 22 to enable communication.

〔Effect of the invention〕

As explained above, when a terminal in communication receives a call request from another terminal, the priority 1p added by the calling terminal for each call, and the priority of the terminal in optical call during communication. If the calling terminal has a higher priority, both terminals that are already communicating are paused, and the calling terminal with the higher priority is automatically connected to the terminal that was communicating. By connecting and automatically restoring a paused call after communication ends,
This has the effect that a call with a high priority can interrupt communication with a terminal in progress, and a call that has been stopped can be re-communicated when the interrupting call ends.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 11.12...Packet switch, 21.22゜23.
...Terminal device, 31.32...Call control memory, 41.
...Relay line.

Claims (1)

[Claims] In a packet switch that accommodates subscriber terminals, when a communicating terminal receives a call request from another terminal, the priority assigned by the calling terminal for each call and the time when the communicating terminal makes a call Compare the priorities, and if the calling terminal has a higher priority, a pause message is sent to both communicating terminals, the call with the higher priority is automatically connected, and the call is paused after the communication ends. A priority processing method that is characterized by automatically restoring calls that were being held.