JPH0520237A - Communication processing device - Google Patents

Abstract

(57) [Abstract] [Purpose] When a processor corresponding to one channel fails, preliminary switching of the failed channel is performed without affecting the communication performed by the processors corresponding to other channels using the same physical line. . [Configuration] Channel-corresponding processors 140-1 to 140-n that perform transmission control on a channel are communicating via a line interface control processor 180 that performs physical line synchronization control and signal control. The resource management processor 100, which includes the resource management table 120 and manages the channel-capable processor, executes the processing performed by the channel-capable processor when a failure occurs in the channel-capable processor by the standby channel-capable processor 160-.
The switching is performed so that it is performed from 1 to 160-m.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication processing device,
In particular, the present invention relates to a communication processing device that combines one or a plurality of time slots on a time-division multiplexed physical line and controls a physical interface that can use this as a communication channel.

[0002]

2. Description of the Related Art As a conventional technique relating to a communication processing device,
For example, the technique described in Japanese Patent Laid-Open No. 2-45854 is known. In this conventional technique, in order to improve the reliability of the communication processing device against a hardware failure, the communication processing device is duplicated, and when one communication processing device fails, an external line switching device is used. The communication processing device itself is switched.

[0003]

In the prior art, since the communication processing device itself is switched using the external line switching device, the switching unit must be at least a physical line unit. Have some problems.

That is, a physical interface capable of combining one or a plurality of time slots on a time-division-multiplexed physical line and using the time slots as a communication channel is configured by assigning a processor for each channel. The conventional technology of the communication processing device realized by
Normally, when only one channel-capable processor fails, it is necessary to switch the entire physical line even though the other channel-capable processors are normal. Therefore, this conventional technique has a problem in that the communication performed by the normal channel-capable processor must be interrupted and restarted once.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to affect the communication performed by another channel compatible processor using the same physical line when one channel compatible processor fails. It is an object of the present invention to provide a communication processing device capable of performing preliminary switching of a failure channel without giving it.

Another object of the present invention is, when the present invention is applied to an ISDN line, in the case of a failure of a channel-capable processor controlling a D channel, on an end-to-end information channel (B channel, H channel). It is an object of the present invention to provide a low-cost, space-saving communication processing device capable of performing preliminary switching without affecting communication at all.

[0007]

According to the present invention, the above object is achieved by allowing only a failed channel-capable processor to be preliminarily switched.

That is, the communication processing device according to the present invention is
Line interface control processor that performs physical line synchronization control and signal control, one or more channel-compatible processors that are provided for each channel and that control transmission on the channel, and time slot allocation status for each channel-compatible processor And a resource management processor that manages the call state of the communication performed in each channel, and a resource management table that holds the management information, and each channel-compatible processor is arbitrarily designated by an instruction from the resource management processor. The resource management processor includes means for controlling time slots, means for detecting a failure of each channel corresponding processor, and call information on the D channel corresponding to communication on the information channel (B channel, H channel). A channel-capable processor with a means for managing When an obstacle is intended Ru switch the processor to the spare processor.

Further, the communication processing apparatus of the present invention uses, as a channel-compatible processor, an active system processor having different processing capacities for each control speed such as B channel and H channel, and a standby system processor. It is configured using a processor that can control all channels.

[0010]

When the resource management processor detects a failure of the channel-capable processor, it activates the standby channel-capable processor, and information relating to communication (channel type time slot, transmission control) performed by the failed channel-capable processor. (Procedure) is set from the resource management table and set in the spare channel corresponding processor, and the communication performed by the faulty channel corresponding processor is continued by the spare channel corresponding processor.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a communication processing device according to the present invention will be described in detail below with reference to the drawings. The embodiment described below is an embodiment in which an ISDN primary group line is used as a physical line.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIGS. 2, 4 and 6 are diagrams for explaining the contents of a resource management table, and FIGS. 3 and 5 are processing operations for preliminary switching. It is a flowchart explaining. In FIG. 1, 100 is a resource management processor, 120 is a resource management table, 140-1 to 140-n, 160-1 to 160-m.
Is a channel corresponding processor, 180 is a line interface control processor, and 190 is a time division multiplex bus.

In the embodiment of the present invention shown in FIG. 1, a line interface control processor 180 is a line interface control unit which is connected to an ISDN line and performs a synchronous control and a signal control of a physical line. Channel-compatible processors 140-1 to 140-n, 160-1 to 160-n
Exists corresponding to each channel and converts bit serial data of a channel composed of one or a plurality of time slots into parallel data, stores the parallel data in a memory in a corresponding control unit, and executes a transmission control procedure. The channel-corresponding processors 140-1 to 140-n are used as the active system, and 160-1 to 160-m are used as the standby system.

Line interface control processor 180
Data is sent and received between the processor and each channel-compatible processor in the time division multiplex bus 1 in which time slots are multiplexed.
90, each channel corresponding processor acquires an arbitrary time slot.

Data transmission and reception between the line interface control processor 180 and each channel corresponding processor is performed by providing a signal line and a data line with the line interface control processor 180 for each channel corresponding processor, It is also possible that the processor assembles data of one or a plurality of designated time slots from the processor corresponding to each channel and then performs the processing through the respective data lines.

The resource management processor 100 manages the operating state of each channel corresponding processor, and first controls the channel corresponding processor for controlling the D channel to perform call control according to the communication request issued from the information processing device. Next, the resource management processor 100 allocates a channel corresponding processor for controlling the relevant information channel (B channel, H channel), activates the processor, and then performs distribution processing of data sent from the information processing device. To do.

The resource management table 120 also stores the state of each resource, that is, the operating state of each channel corresponding processor, the time slot allocation state for each channel corresponding processor, and the call of the communication performed in each channel. Stores status etc.

FIG. 2 shows an example of the contents of the resource management table 120 when the communication processing apparatus according to the embodiment of the present invention shown in FIG. 1 is executing communication processing normally.

In FIG. 2, the vertical direction shows the processor for each channel including the active and spare channels managed by the resource management processor 100, and the horizontal direction shows the allocation of the time slot managed for each channel-compatible processor. Items such as status and call status of communication are shown.

Next, when the status of the processor corresponding to each channel and the communication call is the status shown in the resource management table of FIG. 2, a backup is made when a failure occurs in the processor corresponding to the channel 140-1 (active 1). The switching operation to the channel compatible processor of the system will be described with reference to the flowchart of FIG.

(1) Channel-compatible processor 140-1
When a failure occurs in (active 1), the resource management processor 100 causes the channel corresponding processor 140-1
Detecting a failure of (active 1) (steps 301 and 30)
2).

(2) The resource management processor 100
Channel-capable processor 14 controlling D channel
0-n (working n) is used to release the call on the D channel and the failed channel-capable processor 140-1
The contents of the resource management table relating to (active 1) are rewritten, and the information processing apparatus is notified that a failure has occurred in the communication path with the communication partner (steps 303 to 305).

(3) Next, it is determined whether or not there is a spare channel corresponding processor available in the resource management table 1.
If it is not checked in step 20, the information processing apparatus is notified that communication cannot be continued (steps 306 and 313).

(4) In step 306, if there is a spare channel-compatible processor that can be used, that processor (processor 160-1 in this example) is selected, and the time slot to be acquired (time slot 1 in this example). ),
An operation mode such as a transmission control procedure (X.25 in this example) is set (step 307).

(5) It is judged whether the operation mode setting is OK or not. If NO, the spare channel compatible processor is selected again. If OK, the channel compatible processor controlling the D channel is selected. 104-n to set up a new call on the D channel and reset the connection on the information channel (steps 308-31).
0).

(6) After that, the content of the resource management table 120 is rewritten with respect to the newly started spare processor instead of the failed processor.
The information processing apparatus is notified that the communication path with the communication partner has been restored (steps 311, 312).

By executing the above-described processing, the failed active processor is switched to the standby processor. At the end of the call switching, the resource management table 120
The content of is rewritten as shown in FIG.

In the above description, the channel corresponding processor 140 is used.
Although the switching operation has been described assuming that -1 becomes a failure, the same applies to the case where a failure occurs in any of the channel corresponding processors 140-2 to 140-n.

Next, in the case where the state of the processor corresponding to each channel and the communication call is the state shown in FIG. 2, the operation when a failure occurs in the channel corresponding processor 104-n which controls the D channel will be described. Will be described with reference to the flowchart shown in FIG.

(1) When a failure occurs in the channel corresponding processor 104-n which controls the D channel, the resource management processor 100 detects the failure of this channel corresponding processor (active n) (steps 501, 50).
2).

(2) Regarding the active n processor that has failed, the contents of the resource management table are rewritten, and it is checked whether there is a spare channel corresponding processor (steps 503 and 504).

(3) In step 504, if there is a spare channel-compatible processor that can be used, that processor (processor 160-1 in this example) is selected, and the time slot to be acquired (24 in this example), An operation mode such as a transmission control procedure (D channel protocol in this example) is set (step 505).

(4) It is checked whether or not the operation mode setting is OK, and if NO, the spare channel corresponding processor is selected again, and if OK, the resource management table 1
Information about a call such as a call number and a call status managed by 20 is set in the activated channel corresponding processor, and a call control data link on the D channel is reestablished (step 5).
06-509).

At this time, the state of the call corresponding to the communication on the information channel held on the D channel is held without being released.

(5) In step 504, if there is no spare channel corresponding processor, the connections on all the information channels in use are disconnected, the contents of the resource management table regarding the released call are rewritten, and , Informs the information processing device that communication cannot be continued for all the released connections (steps 510 to 512).

At the end of the preliminary switching by the above-mentioned processing,
The contents of the resource management table 120 are rewritten as shown in FIG.

Although the channel-compatible processor for controlling the information channel shown in the above-described embodiment of the present invention controls up to layer 3, the present invention does not depend on the layer to be supported, and the backup is possible. Layer 4 as the switching method
It is possible to implement a channel-compatible processor in which the above protocols are implemented and perform preliminary switching of these processors.

In addition, the active channel compatible processors 140-1 to 140-n, which are the channel compatible processors which are the constituent elements of the above-described embodiment of the present invention, have channel types, transmission rates, and transmissions determined at the time of system construction. In accordance with a control procedure or the like, it is possible to use an individual channel-compatible processor using a processor having a performance sufficient to satisfy each required function, and the present invention thereby effectively uses the processor capacity. It is possible to build a system that does.

The spare channel processor 160-
1 to 160-m includes a processor 1 corresponding to the active channel
With respect to any of the faults 40-1 to 140-n, a plurality of channel types, so that preliminary switching can be performed,
A channel-capable processor capable of controlling a plurality of transmission rates and a plurality of transmission control procedures is preferably used, and the present invention reduces the amount of hardware and
It is possible to build a communication processing device having a redundant configuration.

According to the above-described embodiment of the present invention, the failure is managed for each channel corresponding processor and the preliminary switching is performed. Therefore, when the failure occurs in the channel corresponding processor which controls the information channel, The preliminary switching can be performed without affecting the communication performed on the information channel, and when the failure occurs in the channel corresponding processor controlling the D channel, the preliminary switching can be performed on the information channel. Preliminary switching can be performed without affecting existing communications.

Further, according to one embodiment of the present invention, it is possible to use a processor capable of controlling all channel types of B channel, H channel and D channel as a spare channel corresponding processor. , This allows
It is possible to reduce the amount of hardware and realize a low-cost communication processing device having a redundant configuration.

Further, according to one embodiment of the present invention, since a channel type processor, a transmission rate, and a transmission control procedure specific one can be used as the active channel corresponding processor, the channel compatible processor is It is possible to use a processor having a performance sufficient to satisfy the functions required for each, and thus it is possible to effectively use the processor capacity.

[0043]

As described above, according to the present invention, when a failure occurs in a channel-compatible processor that controls an information channel, preliminary switching can be performed without affecting communication performed on another information channel. The communication performed by the failed channel corresponding processor can be continued. Further, even if a failure occurs in the channel corresponding processor that controls the D channel, it is possible to perform the preliminary switching of the failed channel corresponding processor without affecting the communication performed in the information channel.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a diagram illustrating the contents of a resource management table.

FIG. 3 is a flowchart illustrating a processing operation of preliminary switching.

FIG. 4 is a diagram illustrating the contents of a resource management table.

FIG. 5 is a flowchart illustrating a processing operation of preliminary switching.

FIG. 6 is a diagram illustrating the contents of a resource management table.

[Explanation of symbols]

100 resource management processor 120 resource management table 140-1 to 140-n, 160-1 to 160-m channel compatible processor 180 line interface control processor 190 time division multiplex bus

Claims (6)

[Claims] 1. A communication processing device for performing a plurality of communications by combining one or a plurality of time slots on a time-division-multiplexed physical line and using them as communication channels, in which physical line synchronization control and signal control are performed. A line interface control processor for performing communication, and a plurality of channel-compatible processors provided for each communication channel and controlling transmission on the communication channels. When a failure occurs in the channel-compatible processor, the failed processor is provided as a standby system. Switch to another channel compatible processor provided as
A communication processing device, characterized in that the processor is made to perform a communication function which is carried out by a processor corresponding to a channel in which a failure has occurred. 2. A resource management processor that manages the operating state of each channel corresponding processor, the allocation state of time slots to each channel corresponding processor, and the state of the call of communication performed on each channel, and holds the management information thereof. 2. The communication processing apparatus according to claim 1, further comprising a resource management table for performing the switching, the switching being performed under the control of a resource management processor. 3. The communication processing device according to claim 2, wherein each of the channel corresponding processors uses one or a plurality of time slots as a communication channel in accordance with an instruction from a resource management processor. . 4. The physical line is an ISDN line, and D
When the channel-capable processor controlling the channel fails, the newly activated standby channel-capable processor inherits the information in the resource management table, so that the B-channel, the H-channel and the H-channel can be released without releasing the call.
4. The communication processing device according to claim 2, wherein the communication being performed on the channel is continued. 5. The processor according to claim 1, wherein the processor for each channel is capable of controlling a plurality of channel types, a plurality of transmission rates, and a plurality of transmission control procedures. Communication processing device. 6. The communication processing apparatus according to claim 1, wherein each processor corresponding to each channel is unique in correspondence with a channel type, a transmission rate, and a transmission control procedure.