JPH04140996A - System configuration switching control method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a system switching control method that enables switching one communication path into two duplex or single duplex systems [Prior Art] Generally, switching In this case, the communication path equipment is duplicated,
One is the active type and the other is the standby type, and under normal conditions, both perform the exact same exchange operation. This is to switch from the active system to the standby system when a failure occurs, and the switching is performed without momentary interruption.

[Problem to be solved by the invention] Conventionally, communication paths are duplicated only in case of a failure, and the maximum call volume is Furthermore, the station equipment is not equipped to handle the call volume in consideration of disasters.

Therefore, there was a high possibility that calls would be restricted if a single call was concentrated. Similarly, when there is a large number of incoming calls, there is a high possibility that incoming calls will be restricted.

An object of the present invention is to - make it possible to increase the number of lines and to increase the number of subscribers who can talk during times when calls are concentrated;

[Means for Solving the Problems] In order to achieve the above object, the present invention has a function of switching a duplex communication path into two single communication paths.

Further, each of the duplexed communication channels is divided into a plurality of blocks, and at least one corresponding block among the blocks is configured to have a function of switching to two single-duplex systems. .

To this end, the present invention provides a method for outputting calls from a plurality of subscribers to the first and second channel devices in a subscriber accommodating exchange having first and second channel devices, or outputting calls from a plurality of subscribers to the first and second channel devices. a distribution means for outputting a part of the call originating from the subscriber to the first communication path device and outputting the remaining call registration to the second communication path device; the first and second selection means for selecting one of the selected calls; and the first and second transmission means for transmitting the call selected by the first and second selection means to the next station. and when the distributing means outputs calls from multiple subscribers to the first and second communication path devices, the first and second selection means select between the first and second communication path devices. Selecting a call output from one of the devices, the distribution means outputs a portion of the calls from multiple subscribers to the first channel device, and the remaining calls are transmitted to the second channel device. the first selection means selects the call output from the first communication path device, and the second selection means selects the call output from the first communication path device.
The call output from the communication path device is selected.

Further, the subscriber accommodating exchange may be provided with comparison means for comparing the number of calls made by multiple subscribers with a predetermined congestion value, and the distribution means may be configured to compare the number of calls made by the plurality of subscribers with a predetermined congestion value. As a result, if the number of calls from multiple subscribers does not exceed a predetermined congestion value, calls from multiple subscribers are
and a second communication path device, and as a result of the comparison by the comparison means, if the number of calls from multiple subscribers exceeds a predetermined congestion value, some of the calls from multiple subscribers may be output to the first channel device, and the remaining calls may be output to the second channel device.

The present invention also provides a switching network comprising a plurality of subscriber exchanges having first and second communication path devices, and a relay exchange facing the plurality of subscriber exchanges, The subscriber accommodating switching center operates in a duplex state in which the same call is connected to the first and second channel devices, and in a single state in which different calls are connected to the first and second channel devices. If the number of calls from multiple subscribers does not exceed a predetermined congestion value, the state is set to duplex state, and the number of calls from multiple subscribers exceeds a predetermined congestion value. 1 if
It is designed to have a function of making it into a dual state.

The above-mentioned subscriber accommodating exchange handles calls from multiple subscribers first.
and output to a second channel device, or output a portion of calls from multiple subscribers to the first channel device and output the remaining calls to the second channel device. means, first and second selection means for selecting one of the calls output from the first and second communication path devices;
and first and second transmission means for transmitting the call selected by the second selection means to the next station, and in the duplex state, the distribution means:
The first and second selection means output calls from a plurality of subscribers to first and second communication path devices, and the first and second selection means select a call output from one of the first and second communication path devices. is selected, and in the single-layer dual system state, the distribution means outputs a part of calls from multiple subscribers to the first communication path device, and outputs the remaining calls to the second communication path device. and the first selection means selects the call output from the first communication path device, and the second selection means selects the call output from the second communication path device. It can be done.

Further, the subscriber accommodating switching center may be provided with means for notifying the effect of switching from the duplex state to the single-layer dual system state and the effect of switching from the single-plex dual system state to the duplex state. can.

Furthermore, the present invention provides a switching network comprising a plurality of subscriber exchanges having first and second communication path devices, and a relay exchange opposite to the plurality of subscriber exchanges, The subscriber accommodating switching center operates in a duplex state in which the same call is connected to the first and second channel devices, and in a single state in which different calls are connected to the first and second channel devices. If the number of incoming calls to the own station does not exceed a predetermined congestion value, the duplex state is established, and if the number of incoming calls to the own station exceeds the predetermined congestion value, It is designed to have a function of creating a single-layer dual-type state.

When the number of incoming calls to at least one subscriber accommodating exchange among the plurality of subscriber accommodating exchanges exceeds a predetermined congestion value, the transit exchange and notifies the subscriber accommodating exchange that the duplex state will be switched from the duplex state to the single duplex state, and if the number of incoming calls to the subscriber accommodating exchange does not exceed a predetermined congestion value, It is also possible to provide a means for notifying the switching from the single-duplex state to the duplex state.

In addition, when at least one subscriber accommodating exchange among the plurality of subscriber accommodating exchanges enters the single-layer 2-type state, the relay switching center enters the single-layer 2-type state. Preferably, the switching capacity is used to switch calls transmitted from a subscriber-serving switching center.

[Operations] The present invention makes it possible to pass up to twice as many calls by switching from a duplex system to a single system.

Therefore, in normal times, the duplex system is used as before, but when there is a temporary surge of calls due to an earthquake, etc., switching from duplex to single duplex system reduces the possibility of being subject to outgoing and incoming call restrictions. It is possible to improve services to subscribers.

It should be noted that - when the temporary call concentration is resolved, it is sufficient to switch from the 2-way single system to the 2-way system.

(Margin below) [Example code] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an LS station (subscriber accommodating switching center) to which a system configuration switching control system according to an embodiment of the present invention is applied.

In FIG. 1, 1 is a subscriber, 2 is a subscriber circuit, 3 is a concentrator, 4 is a concentrator highway selection circuit, 5 is a 0 system communication path device, 6 is a 1 system communication path device, and 7 is a communication path highway selection circuit. The circuits 8 and 9 are communication highways, and 10.11 is a concentration highway.

Normally, it has a duplex configuration, and calls from subscriber 1 are condensed to concentrator highway 10 via subscriber circuit 2 by concentrator i3. The concentrating highway selection circuit 4 selects the concentrating highway 10. This results in 0
The same concentrating highway 10 is connected to the system communication path device w5 and the system 1 communication path device 6, and the communication path becomes redundant.

In addition, the highway output from the communication path devices 5 and 6 is
The signal is outputted to the communication path highway 8 or 9 by the communication path highway selection circuit 7-0.7-1, and is connected to the next station or transmission device.

When switching from duplex to single-layer dual system, the line concentrator 3 concentrates calls from multiple subscribers and connects them to the line concentrator highway 10.
．． Divide half into 11 people. The east line highway selection circuit 4 selects the concentrated highway 11. This results in
Calls from half of the subscribers go through the concentration highway 10 to the 0-system communication path device 5, and calls from the remaining half of the subscribers go through the concentration highway 11 to the 1-system communication path device w6.
It becomes connected to.

Further, the communication route highway selection circuit 7-0 selects the highway output from the 0 system communication route device 5 as the communication route highway 8.
The communication path/highway selection circuit 7-1 outputs the highway output from the 1-system communication path device 6 to the communication path highway 9.

In this way, it is possible to switch the system from a duplex system to a single duplex system when calls are concentrated.

Note that when the concentration of calls is resolved, the system is switched from a single system with two systems to a dual system.

Next, the operation in the TS station (relay switching center) facing the LS station of this embodiment will be explained.

The TS station faces a plurality of LS stations, as shown in FIG. 6A.

As shown in FIG. 6A, if the TS station has the function of switching switching equipment for 1/n stations, the switching operation is performed based on the narrow width information notified from the LS station. The sequence at this time is shown in FIG.

As shown in FIG. 7, when the number of calls reaches a preset narrow value, the LS station transmits narrow width information to the TS station.

The TS station that has received the narrow width information determines that the width is narrow, prepares for switching, and then transmits a preparation completion signal to the LS station. Incidentally, if the switching equipment for 1/n stations has already been switched due to the narrow width of other LS stations, a switching impossible signal is transmitted.

When the LS station receives the ready signal, it switches to the single duplex system as described above. As a result, a call can be made using two single-layered systems.

Then, when the number of calls drops below the thin width setting value.

Switch to duplexing and transmit non-narrow information to the TS station.

The TS station that has received the non-narrow width information determines that the TS station is non-narrow, and transmits a narrow width support end signal to the LS station.

Note that signals such as narrow information exchanged between the LS station and the TS station are transmitted n times for protection.

Also, as shown in Figure 6B, if the TS station has a function that can switch the switching equipment for n stations, that is, when all the opposing LS stations have switched to single-layered and dual-type switching If it has capacity, there is no need to send and receive congestion information, etc.

Note that there are two methods for exchanging dial signals between the LS station and the TS station: a method of transmitting and receiving dial signals using a common line signaling system, and a method of transmitting and receiving dial signals using a signaling device.

When transmitting and receiving signals using a signal device, the LS station must have a heart that can handle two single-layer systems, and the TS
On the station side, equipment for 1/n stations or for the entire circumference is required.

Next, an example of transmitting congestion information will be explained with reference to FIGS. 4 and 5.

In FIG. 4, 5 is a 0-system communication path device, 6 is a 1-system communication path device, 7-0.7-1 is a communication path highway selection circuit, and 8
, 9 is the communication route highway, 12 is the 0 system communication route highway, 13 is the 1 system communication route highway, and 14 is width information.

Normally, the system is duplexed, and the communication route highway selection circuit 7-0.7-1 selects the ACT system communication route highway.For example, if 50 series is ACT, the 0 system communication route is selected. Highway 12 is selected and communication route Highway 8
, 9.

When switching from duplexing to single duplexing and transmitting narrow width information as described above, the nth time slot can be used, for example, as shown in FIG. 5.

In FIG. 5, the congestion information 14 is set in the nth time slot from the 0th time slot to the mth time slot, and the communication route highway selection circuit 7 shown in FIG. -0 is 0th to n-
For the 1st time slot and the n+1st to mth time slots, the O-thread traffic highway 12
Select the output from .

For the n-th time slot, the narrow width information 14 is selected.

Similarly, the communication route highway selection circuit 7-1 shown in FIG.
is the 0th to n-1th time slot and n+
For the 1st to mth time slots, the output from the 1st channel highway 13 is selected, and for the nth time slot, the narrow width information 14 is selected.

By doing this, the TS station only needs to refer to the narrow width information 14 set in the n-th time slot by the channel highway selection circuit 7-0 or 7-1.

Note that other signals other than the narrow width information are also transmitted in the same manner.

Next, order management in the software for this embodiment will be explained.

Switching from a duplex system to a single system system with two systems is equivalent to doubling the number of 4-way systems that can be exchanged.

Therefore, as shown in FIG. 10, management can be achieved by adding one bit to the exchange highway number managed by software to provide system information. In other words, when the system is duplicated, the same path is set for both the 0 system and the 1 system, so the system information is ignored, and only when the system is single system 2, the system information is used to Distinguish between 0-system paths and 1-system paths.

This makes it possible to migrate the software from a duplex system to a single system system.

In addition, for example, when transitioning from a duplex to a single duplex system,
By using a system in which the standby system handles only the calls that are overflowing from the active system.

When the active system is no longer overflowing with calls, the standby system can be switched to active standby by simply copying the path.

Next, as shown in FIG.
A second example of switching to the formula will be described.

In FIG. 2, 1 is a subscriber, 2 is a subscriber circuit, 3 is a concentrator, 4-1 to 4-n are concentrator highway selection circuits, and 5
is the 0 system communication path device, 6 is the 1 system communication path device, 7-0.7-
Reference numeral 1 indicates a communication route highway selection circuit, and 8 and 9 indicate communication route highways.

In comparison with the first embodiment, in the second embodiment, the concentrating highway selection circuit is divided into 1 to n blocks, and furthermore, the inside of the communication path devices 5 and 6 corresponds to each block. The difference is that it is divided into two parts.

Therefore, it is possible to realize partial duplexing in which only specific communication channels among blocks 1 to n are duplexed.

However, the internal division of one channel device 5, 6 is virtual,
Connections are restricted through software processing.

Next, according to Fig. 3, the third
An example will be explained.

In FIG. 3, 1 is a subscriber and 2 is a subscriber circuit.

3 to 0.3-1 are line concentrators, 5 is a 0-system communication path device, 6 is a 1-system communication path device, 7-0.7-1 is a communication path highway selection circuit, and 8 and 9 are communication path highways. .

Normally, a duplex configuration is used, and a call from subscriber 1 is connected via subscriber circuit 2 to multi-connected concentrator circuit 3-0.3-1. Concentrator circuit 3-0.3-1
performs the same line concentration and is connected to the 0-system communication path device i5 and the 1-system communication path device 6, respectively.

The same connection is made in the communication path devices 5 and 6 as well. Further, the communication route highway selection circuit 7-0.7-1 selects the active communication route highway, and selects the standby system in the event of a failure.

When switching from duplex to single-duplex system, half of calls from multiple subscribers are concentrated by line concentrator 3-0, and the remaining half are concentrated by line concentrator 3-1. Furthermore, line concentrator 3-0
The calls concentrated at
is output to. Similarly.

The calls concentrated by the concentrator 3-1 are output to the highway 9 via the communications path device 6 by the communications highway selection circuit 7-1.

In this way, it is possible to switch the system from a duplex system to a single duplex system when calls are concentrated.

Note that in the second embodiment and the third embodiment, the sequence with the opposing TS station is the same as in the first embodiment.

Further, in the above-described embodiment, calls are divided into halves, but there is no particular need to divide the calls into halves.

The above-mentioned embodiment is an example in which duplexing is switched to two single-layering systems when calls at the LS station are concentrated and the width becomes narrow.

Next, an example in which the incoming calls to the LS station are concentrated and the width becomes narrow will be described with reference to FIGS. 8 and 9.

FIG. 8 is a block diagram showing the configuration of an LS station and a TS station to which this embodiment is applied.

As shown in FIG. 8, the TS station has a spare equipment 415 that performs the transmission function for l/n stations, and the LS station has a selection circuit 7-2 for switching to this spare equipment 15. Just do it like this.

An LS station having such a configuration can be realized by easily applying the configuration of the above embodiment.

Under normal conditions, the LS station selection circuit 7-
2 selects the communication route highway that normally faces the TS station and connects it to communication route devices 5 and 6.

When switching from duplex to single duplex, spare equipment 15
Select the communication route highway and connect to the communication route device 6. Therefore, the communication path highway facing the TS station is normally connected to the communication path device 5 and the selected backup equipment 15
The communication path highway is connected to the communication path device 6.

The sequence at this time is shown in FIG.

As shown in FIG. 9, when the number of incoming calls to a certain LS station reaches a preset narrow value, the TS station sends a call to the corresponding LS station.
Send narrow information to the station.

The LS station that received the narrow width information determines that the width is narrow and transmits 1
After switching to type 2 duplexing, a switching completion signal is transmitted to the TS station.

When the TS station receives the switching completion signal, it starts a call using the communication route highway of the backup equipment 15.

When the number of incoming calls falls below the convergence setting value, the standby equipment 15 terminates the call using the communication route highway and transmits non-congestion information to the LS station.

The LS station that has received the non-narrow width information determines that the LS station is non-narrow, switches to duplexing, and then transmits a switching completion signal to the TS station.

In this way, even if incoming calls at the LS station become concentrated and congested, it is possible to switch from duplex to single duplex.

Note that in this case, transmission of signals such as ring information can be performed in the same manner as described above.

Furthermore, the above-described embodiment and this embodiment can be combined, and in this way, even if calls to the LS station are concentrated and the width is narrow, even if calls to the LS station are concentrated and the width is narrow, However, by switching from duplex to single-duplex, it is possible to increase the number of subscribers who can make calls.

Furthermore, when the width narrowness is resolved, the system switches from a single system with two systems to a dual system, which is optimal for dealing with a temporary concentration of calls.

[Effects of the Invention] As described above, according to the present invention, the system configuration can be changed so that a duplexed communication path is converted into two single-duplexed communication paths.

Therefore, by switching to single duplexing when the line width is narrow, and switching to duplexing when the line width is low, it is possible to increase the number of lines per line and increase the number of subscribers who can make calls during times when calls are concentrated. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an LS station to which the system configuration switching control method of the first embodiment of the present invention is applied, and FIG. 2 is a block diagram showing the configuration of an LS station to which the system configuration switching control method of the second embodiment of the present invention is applied. Figure 3 is a block diagram showing the configuration of an LS station to which the system configuration switching control method of the third embodiment of the present invention is applied. Figures 4 and 5 are An explanatory diagram for explaining an example of information transmission, FIG. 6 is a block diagram showing the configuration of a TS station facing the LS station of the first embodiment, and FIG. 7 is a diagram of the LS station and TS station of the first embodiment. FIG. 8 is a block diagram showing the configuration of an LS station to which the system configuration switching control method of the fourth embodiment of the present invention is applied and a TS station facing it, and FIG. Sequence diagram between the LS station and the TS station in Example 4, No. 10
The figure is an explanatory diagram for explaining software management. 1...Subscriber, 2...Subscriber circuit, 3,3~0.3
-1... Concentrator, 4.4-1 to 4-n... Concentration highway selection circuit, 5... 0 system communication path device, 6...
1 system communication path device, 7-0° 7-1... communication path highway selection circuit, 7-2... communication path highway, 8.9... communication path highway, 10, 11... concentration highway, 1
2...0 series communication route highway, 13...1 series communication route highway, 14...width information, 15...backup equipment.

Claims (1)

[Scope of Claims] A system configuration switching control system characterized by having a function of switching from one duplex communication path to two single communication paths. 2. It is characterized by having a function of dividing each duplexed communication path into a plurality of blocks, and switching at least one corresponding block among the blocks to two single-duplex systems. System configuration switching control method. 3. In a subscriber accommodating exchange having first and second channel devices, output calls from multiple subscribers to the first and second channel devices, or output calls from multiple subscribers to the first and second channel devices. a distribution means for outputting a part of the call to a first communication path device and outputting the remaining call to a second communication path; comprising first and second selection means for selecting a call, and first and second transmission means for transmitting a call selected by the first and second selection means to a next station; When a call from one of the first and second communication path devices is output to the first and second communication path devices, the first and second selection means select the call output from one of the first and second communication path devices. The above-mentioned distribution means sends a portion of calls from multiple subscribers to the first
when the remaining calls are output to the second communication path device, the first selection means selects the call output from the first communication path device, and outputs the remaining calls to the second communication path device. A subscriber accommodating exchange characterized in that the second selection means selects the call output from the second communication path device. 4. Comparing means for comparing the number of calls made by multiple subscribers and a predetermined congestion value;
If the number of calls from multiple subscribers does not exceed a predetermined congestion value, the calls from multiple subscribers are output to the first and second communication path devices, and as a result of the comparison by the comparison means, the number of calls from multiple subscribers is When the number of calls from subscribers exceeds a predetermined congestion value, a portion of the calls from multiple subscribers are output to the first channel device, and the remaining calls are sent to the second channel. 4. The subscriber accommodating switching center according to claim 3, wherein the subscriber accommodating switching center outputs the output to a device. 5. In a switching network comprising a plurality of subscriber accommodating exchanges having first and second communication path devices and a relay exchange opposite to the plurality of subscriber accommodating exchanges, the subscriber accommodating The switching center has a duplex state in which the same call is connected to the first and second channel devices, and a single duplex state in which different calls are connected to the first and second channel devices. If the number of calls from multiple subscribers does not exceed a predetermined congestion value, the duplex state is set, and if the number of calls from multiple subscribers exceeds the predetermined congestion value, A system configuration switching control method characterized by having a function of setting the system to a dual state. 6. The subscriber accommodating switching center outputs calls from multiple subscribers to the first and second communication path devices, or outputs a portion of calls from multiple subscribers to the first communication path. a distribution means for outputting the call to the device and outputting the remaining call to the second communication path device; and first and second means for selecting one of the calls output from the first and second communication path devices; a selection means; and first and second transmission means for transmitting calls selected by the first and second selection means to the next station; The first and second selection means select the call output from one of the first and second communication path devices. In the single-layer dual-system state, the distribution means outputs a portion of calls from multiple subscribers to the first channel device, and outputs the remaining calls to the second channel device. , the first selection means selects the call output from the first communication path device;
6. The system configuration switching control system according to claim 5, wherein said second selection means selects a call output from a second communication path device. 7. The above subscriber accommodating switching center changes from the duplex state to the single duplex state.
7. The system configuration switching control system according to claim 5, further comprising means for notifying the effect of switching to the system state and the effect of switching from the single-duplex state to the duplex state. 8. In a switching network comprising a plurality of subscriber accommodating exchanges having first and second communication path devices and a relay exchange facing the plurality of subscriber accommodating exchanges, the subscriber accommodating The switching center has a duplex state in which the same call is connected to the first and second channel devices, and a single duplex state in which different calls are connected to the first and second channel devices. If the number of incoming calls to one's own station does not exceed a predetermined congestion value, the duplex state is established, and if the number of calls to one's own station exceeds a predetermined congestion value, the duplex state is set to two. A system configuration switching control method characterized by having a function of setting a state. 9. The above-mentioned relay exchange is configured to, when the number of incoming calls to at least one subscriber-accommodating exchange out of the plurality of subscriber-accommodating exchanges exceeds a predetermined congestion value, , and if the number of incoming calls to the subscriber accommodating exchange does not exceed a predetermined congestion value, the subscriber accommodating exchange 9. The system configuration switching control method according to claim 8, further comprising means for notifying the user of switching from the single-duplex state to the duplex state. 10. When at least one subscriber accommodating exchange among the plurality of subscriber accommodating exchanges enters the single-layer 2-type state, the relay switching center enters the single-layer 2-type state. Claims 5 and 6 characterized in that it has a switching capacity used for exchanging calls transmitted between the subscriber accommodating switching center and the subscriber accommodating switching center.
, 7, 8 or 9.