KR100400929B1 - Apparatus and method for termination of subscriber units in data communication system - Google Patents

Abstract

The present invention provides a subscriber unit multiple switching device and a method of a communication system in which a signal selected by a subscriber interface unit is connected to a spare unit along a common line when N: 1 switching of subscriber equipment of a communication system is performed. The apparatus includes a plurality of subscriber interface units for interfacing to subscriber lines; A plurality of subscriber unit units for processing subscriber signals interfaced by the subscriber interface unit; A first spare unit having a configuration equivalent to that of the subscriber unit, for processing the subscriber signal selected by each subscriber interface under control of the control unit when the subscriber unit is switched; A switching unit unit for connecting a subscriber line to connect the subscriber signal to the second spare unit unit, and for controlling the control unit to connect the subscriber signal selected at each subscriber interface unit to the second spare unit unit; A second spare unit unit for processing the subscriber signal connected by the switching unit unit; It includes a control unit that monitors the operation status of each subscriber unit unit and controls subscriber signal selection of each subscriber interface unit and transfer unit unit when switching is required, and can reduce the number of components for signal selection and the number of connectors for signal line connection. Spare units can be mounted anywhere to allow N: 1 switching.

Description

Subscriber multi-switching device of communication system and method thereof {Apparatus and method for termination of subscriber units in data communication system}

The present invention relates to a subscriber unit multiple switching of a communication system, and more particularly, to a subscriber unit multiple switching device of a communication system and a method thereof so as to be suitable for N: 1 switching when switching a subscriber equipment of a communication system. .

In general, the subscriber equipment of the communication system is connected to the subscriber line to manage data communication between the central station and the subscriber. Such subscriber equipment includes telephone switching equipment, Asynchronous Digital Subscriber Line (ADSL) equipment, and T1 / E1 equipment.

In subscriber equipment in which a plurality of subscriber lines are concentrated, a spare unit is provided for switching due to a malfunction of the operating subscriber unit. Unit switching is provided with a spare unit having a configuration and function equivalent to that of the subscriber unit currently in operation, and if necessary, the spare unit replaces the function of the subscriber unit.

If one spare unit is provided for N subscriber units, N: 1 switching is possible.

Figure 1 shows a subscriber unit multiple switching device of a communication system according to the prior art.

As shown in FIG. 1, the interface to the subscriber line is in charge of the subscriber interface unit 110, and the function of processing the subscriber signal interfaced by the subscriber interface unit 110 is performed by the subscriber unit unit 130. do. Subscriber unit 130 is provided with a plurality. The spare unit 150 has a configuration equivalent to that of the subscriber unit 130 and processes the subscriber signal when the unit is switched.

The subscriber interface 110 includes a transceiver 111 for transmitting and receiving subscriber signals and a signal selector 112 for selecting a subscriber signal when switching and varying a signal transmission path between the spare unit and the subscriber unit.

The unit selector 140 is responsible for selecting each subscriber signal with respect to the spare unit 150. That is, the unit selector 140 selects a signal selected by each subscriber interface unit 110 and connects the spare unit 150 to the spare unit 150. When the subscriber signal is selected and the spare unit is connected, unit switching is performed, and the signal selection operation of the signal selecting unit 112 and the unit selecting unit 140 is controlled by a controller (not shown) or the like in connection with the unit switching.

Unit switching operation according to such a configuration will be described.

The T1 / E1 line is used as a method of selecting a subscriber's signal in an optical transmission device such as a subscriber optical transmission device (FLC, or Fiber Loop Carrier). Accordingly, the subscriber signal transmitted through the T1 / E1 line is transmitted to the subscriber interface unit 110. Here, a plurality of subscriber interface unit 110 is provided, the subscriber unit 130 is the same number.

In the case of the subscriber interface unit 110, the subscriber signal is transmitted to the signal selector 112 via the transceiver 111.

Regarding the subscriber signal transmitted to the signal selector 112, it is determined whether to be connected to the subscriber unit 130 or the spare unit 150. This determination depends on whether the switching of the subscriber unit 130 is necessary. The switching unit 130 generates a switching control signal to control the signal selection unit 112 or the state of each subscriber unit in a separate control unit. It is possible to determine whether to switch by monitoring and generating a switching control signal if necessary to control the signal selector 112.

For example, when the subscriber unit unit 130 is normal, the signal selector 112 sends the subscriber signal to the corresponding subscriber unit unit 130. Then, the subscriber unit 130 processes the corresponding subscriber signal.

On the contrary, if the subscriber unit unit 130 is abnormal, the signal selector 112 connects the subscriber signal to the unit selector 140. The signal selected by the signal selector 112 is transmitted to the unit selector 140 through the motherboard pattern.

The subscriber signals selected by the signal selector 112 of each subscriber interface 110 are all connected to the unit selector 140. For example, if the subscriber signal of the subscriber interface 110 is 4 pairs and the number of the subscriber unit 130 is 16, the number of signals connected to the unit selector 140 is 4 * 16 = 64.

The unit selector 140 selects a signal selected from each subscriber interface unit 110 and connects the selected unit to the spare unit 150. That is, when the unit selection unit 140 configures a path for receiving signals from the 16 subscriber interface units 110 and needs to switch subscriber signals of any one of them. The subscriber signal is connected to the spare unit 150 at. When the transfer is made, the spare unit 150 processes the subscriber signal. Therefore, when there are 16 subscriber units 130 and one spare unit 150, 16: 1 switching is possible.

At this time, the unit selection unit 140 and the spare unit 150 is fixed in the slot position to be mounted in the self. That is, the unit selection unit 140 and the spare unit 150 can function only when they are mounted in the designated slots, which is a pattern connection between the subscriber interface unit 110 and the unit selection unit 140 and unit selection. This is because the pattern connection between the unit 140 and the spare unit 150 is fixed.

However, in the related art described above, a large number of components (e.g., relays) for selecting signals at the signal selector and the unit selector of the subscriber interface unit are required, and a plurality of connection patterns are included in the unit selector. This is complicated and in some cases additional connectors need to be added.

In addition, since the mounting positions of the spare unit and the unit selector are fixed, it is difficult to variably operate the slots in the self, and when there is an error in the slot in which these units are mounted, there is a problem in that the normal switching operation of the subscriber signal cannot be performed.

SUMMARY OF THE INVENTION The present invention has been created to solve the above conventional problem, and an object of the present invention is to mount a signal selected by a subscriber interface unit at a specific position along a common line when switching unit N: 1 of a subscriber equipment of a communication system. In the case where the spare unit is connected to the spare unit, and the spare unit is mounted at the other position, the present invention provides a subscriber unit multiple switching device and a method thereof in which a switching unit connects a subscriber signal to the corresponding spare unit.

The subscriber unit multiple switching device of the communication system of the present invention for achieving the above object comprises a plurality of subscriber interface units for the interface to the subscriber line; A plurality of subscriber unit units for processing subscriber signals interfaced by the subscriber interface unit; A first spare unit unit having a configuration equivalent to that of the subscriber unit unit, for processing a subscriber signal selected by each subscriber interface unit under control of a control unit when the subscriber unit is switched; A switching unit unit for interfacing the subscriber lines to connect subscriber signals to a second spare unit unit and to connect a subscriber signal selected at each subscriber interface unit to a second spare unit unit under control of a controller; A second spare unit section for processing subscriber signals connected by said switching unit section; And a control unit for monitoring the operation state of each subscriber unit unit and controlling subscriber signal selection of each subscriber interface unit and transfer unit unit when transfer is required.

In order to achieve the above object, a subscriber unit multiple switching method of the communication system of the present invention includes the steps of: mounting a spare unit in a first spare unit and a subscriber unit in a second spare unit; Controlling the signal selection unit of the switching unit unit to connect the subscriber signal of the transceiver unit to the second spare unit unit; A control unit monitoring each subscriber unit unit to determine whether unit switching is necessary; If switching of the subscriber unit is unnecessary, controlling the signal selection unit of each subscriber interface unit to connect the subscriber signal of the transceiver unit to the corresponding subscriber unit unit; When switching of the subscriber unit is necessary, the control unit controls the subscriber interface unit which has connected the subscriber signal to the corresponding subscriber unit unit so that the subscriber signal is transmitted through the common line, and the subscriber signal connected to the common line is transferred to the first spare unit unit. Characterized in that it comprises a step of being processed by the spare unit.

1 is a block diagram of a subscriber unit multiple switching device of a communication system according to the prior art;

2 is a block diagram of a subscriber unit multiple switching device of a communication system according to an embodiment of the present invention;

3 is a flowchart of a multiple switching method of a subscriber unit of a communication system according to an embodiment of the present invention.

4 is a flowchart of a multiple switching method of a subscriber unit of a communication system according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

210: subscriber interface unit 220: switching unit unit

230: subscriber unit portion 240: second spare unit portion

250: first spare unit 270: control unit

211, 221: transceiver unit 212, 222: signal selector

213, 223: control conversion unit

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram of a subscriber unit multiple switching device of a communication system according to an embodiment of the present invention, and FIG. 3 is a flowchart of a multiple switching method of subscriber unit of a communication system according to an embodiment of the present invention, and FIG. A flowchart of a multiple switching method of a subscriber unit of a communication system according to another embodiment of the present invention.

The present embodiment is applicable to N: 1 multiplexing of subscriber units connected to the T1 / E1 line of subscriber optical transmission equipment, and enables unit switching while operating one spare unit for N subscriber units. .

As shown in Fig. 2, the present embodiment provides a plurality of subscriber interface units 230 for processing subscriber signals interfaced by the subscriber interface unit 210 and the subscriber interface unit 210 for the interface to the subscriber line. The first preliminary unit unit 250 for processing the subscriber signal selected by each subscriber interface unit 210 when the subscriber unit unit 230 is switched, and the subscriber line A switching unit unit 220 and a switching unit for connecting the subscriber signal to the second spare unit and connecting the subscriber signal selected by each subscriber interface unit 210 to the second spare unit unit 240 when the switching control signal is generated. The second preliminary unit unit 240 for processing the subscriber signal connected by the unit 220, the operating state of each subscriber unit unit 230 is monitored to transfer When generating a switching control signal comprises a control unit 270 for controlling the subscriber select signal of each subscriber interface unit 210 and switching unit 220. At this time, the subscriber signal connected between each subscriber interface unit 210, the switching unit unit 220, and the first preliminary unit unit 250 is transmitted through a common line implemented by a motherboard pattern.

The subscriber interface unit 210 and the subscriber unit unit 230, which may be provided in plural numbers, are the same. In addition, one spare unit is sufficient, and the description is divided into a first spare unit 250 and a second spare unit 240 to indicate that the spare unit can be selectively mounted at these two positions. will be. That is, when the spare unit is mounted on the first spare unit unit 250, the second spare unit unit 240 may be equipped with a subscriber unit to operate the subscriber signal, and conversely, the second spare unit unit 240 may be operated. In the case where the spare unit is installed, the first preliminary unit unit 250 may be equipped with a subscriber unit to operate a subscriber signal.

The subscriber interface 210 includes a transceiver 211 for transmitting and receiving subscriber signals and a signal selector 212 for changing a signal transmission path between a common line and a subscriber unit connection line by selecting a subscriber signal according to a switching control signal. And a control converter 213 for appropriately changing the voltage level of the transfer control signal transmitted from the controller 270 to a level required by the signal selector 212. The signal selector 212 selects one of two paths and connects it with the subscriber signal of the transceiver 211.

In addition, the switching unit unit 220 may perform an interface to the subscriber line, and may also perform a switching operation of connecting the subscriber signal selected by each subscriber interface unit 210 to the second preliminary unit unit 240. The transfer unit 220 selects a subscriber line connected to the common line or the transceiver line 221 according to the transfer control signal to the subscriber signal connected to the transceiver unit 221 and the second preliminary unit unit 240 for the subscriber signal transmission and reception. And a control converter 223 for appropriately changing the voltage level of the transfer control signal transmitted from the controller 270 to a level required by the signal selector 222. It is made to include. The signal selector 222 selects one of the subscriber signal and the common line of the transceiver 221 and connects it to the second spare unit 240.

As such, the subscriber interface unit 210 and the transfer unit unit 220 perform the interface of the subscriber line. The signal selector 212 of the subscriber interface unit 210 performs the subscriber signal of the transceiver unit 211 in the default connection state. Is connected directly to the subscriber unit 230, the signal selector 222 of the switching unit 220 is the subscriber signal of the transceiver unit 221 is blocked in the default connection state and transmitted through the common line The subscriber signal is adapted to connect the second spare unit directly. The signal connection unit 212 of the subscriber interface unit 210 indicates a case in which the subscriber unit 230 that processes the corresponding subscriber signal does not receive a transfer control signal due to normal operation. The transfer unit unit 220 In the signal selection unit 222, the subscriber signal selected by each subscriber interface unit 210 is directly connected to the second spare unit unit 240.

The control unit 270 controls the subscriber signal selection operation of each subscriber interface unit 210 using the transfer control signal, and controls the subscriber signal selection operation of the transfer unit unit 220 using another transfer control signal.

Next, an embodiment of a multiple switching method applied to the apparatus described above will be described. Embodiments of this apparatus can be divided into three, the first corresponds to the case in which the spare unit is mounted and operated in the first spare unit unit 250, the second is to the second spare unit unit 240 This is the case when the spare unit is mounted and operated, and the third is when the subscriber unit is mounted and operated as a spare unit in a specific predetermined location.

Referring to the first embodiment of the present invention, as shown in FIG. 3, first, if the corresponding units are mounted in each of the subscriber interface 210, the subscriber unit 230, and the transfer unit 220, the first preliminary The spare unit is mounted on the unit unit 250 (S310).

Since one spare unit is sufficient, the second spare unit unit 240 mounts a subscriber unit. At this time, rather than having a functional difference between the spare unit and the subscriber unit is divided according to the mounting position in relation to the unit switching (S320).

The controller 270 controls the signal selector 222 of the switching unit 220 to connect the subscriber signal of the transmitter / receiver 221 to the second spare unit 240. Then, assuming that there are 16 subscriber units including the second spare unit 240, subscriber signal processing for 15 subscriber interface units 210 and 1 switching unit unit 220 is possible. In this case, subscriber signal transfer operations of the switching unit unit 220 and the subscriber interface unit 210 are performed in the same manner (S330).

The control unit 270 monitors each subscriber unit unit 230 to determine whether unit switching is necessary. The condition under which the transfer is performed is well known, such as a malfunction of the subscriber unit, and may be arbitrarily set by the operator (S340).

When switching of the subscriber unit is unnecessary, the signal selector 212 of each subscriber interface unit 210 connects the subscriber signal by default. The default connection state of the subscriber interface 210 is to connect the subscriber signal of the transceiver 211 to the corresponding subscriber unit 230 (S350).

Thus, if it is determined that the switching of the subscriber unit is necessary, the control unit 270 generates the transfer control signal and controls the subscriber interface unit 210 which has connected the subscriber signal to the corresponding subscriber unit unit 230 so that the subscriber signal has a common line. To be sent to. In the process of connecting the subscriber signal to the common line, the transfer control signal is level-converted by the control converter 213 and then controls the signal selector 212 so that the transmission path of the subscriber signal is switched (S360).

The subscriber signal connected to the common line according to the switching control signal is transferred to the first spare unit 250 and processed by the spare unit. At this time, since the transmission path of the subscriber signal connected through the common line is limited to the first preliminary unit unit 250, N: 1 switching is performed (S370).

As a result, the required unit switching operation is performed, and then the control unit 270 monitors each subscriber unit unit 230 and checks whether the transfer is required. After the unit switching is normally performed, the operator repairs the unit and returns to the normal state, and then transfers it from the spare unit to the corresponding unit again. Since this operation is performed in the same system as the previously described switching operation, the detailed description thereof is omitted. .

Meanwhile, referring to the second embodiment of the multiple switching method, as shown in FIG. 4, after the corresponding units are mounted in each of the subscriber interface unit 210, the subscriber unit unit 230, and the transfer unit unit 220. The spare unit is mounted on the second spare unit unit 240 and the subscriber unit is mounted on the first spare unit unit 250. The position of the second spare unit 240 may be arbitrarily selected from among the subscriber unit 230 in which the subscriber units are mounted. In this case, the signal line connection between the switching unit 220 and the corresponding second unit 240 may be prevented. It should be done. Since the subscriber unit can be mounted in the first spare unit unit 250, for example, the first spare unit unit 250 can process the T1 / E1 signal while other subscriber unit unit 230 processes the ADSL subscriber signal. Can be processed. Thus securing the variability of the operation method will improve the availability of subscriber equipment (S410 ~ S420).

The control unit 270 controls the signal selection unit 222 of the switching unit unit 220 to connect the subscriber signal transmitted through the common line to the second spare unit unit 240, which corresponds to a default connection state. . Then, the first preliminary unit unit 250 performs another type of subscriber service, and if there are 15 subscriber units, subscriber signal processing for 15 subscriber interface units 210 is possible. In this case, the switching unit unit 220 does not transmit the subscriber signal through the subscriber line connected to itself, but only connects the subscriber signal of the other subscriber interface unit 210 to the second spare unit unit 240 when switching. To perform. Accordingly, one spare unit switching, that is, 15: 1 switching, is possible for 15 subscriber units (S430).

The control unit 270 monitors each subscriber unit unit 230 and determines whether unit switching is necessary (S440).

When switching of the subscriber unit is unnecessary, the signal selector 212 of each subscriber interface unit 210 connects the subscriber signal by default so that the subscriber signal of the transceiver unit 211 is connected to the corresponding subscriber unit unit 230. (S450).

If it is determined that switching of the subscriber unit is necessary, the control unit 270 generates a transfer control signal and controls the subscriber interface unit 210 which has connected the subscriber signal to the corresponding subscriber unit unit 230 so that the subscriber signal has a common line. To be sent to. In the process of connecting the subscriber signal to the common line, the transfer control signal is level-converted by the control converter 213 and then controls the signal selector 212 so that the transmission path of the subscriber signal is switched (S460).

The subscriber signal connected to the common line according to the switching control signal is transferred to the switching unit unit 220 and is transferred to the second spare unit unit 240 through the default connection of the signal selection unit 222 and processed by the spare unit. At this time, if a unit providing another type of subscriber service is mounted in the first spare unit unit 250 and the common line connection to the corresponding unit is released, the transmission path of the subscriber signal connected through the common line is the second spare unit. Since it is limited to the unit 240 only, the N: 1 switching is performed as expected (S470).

Subsequent operations are as described above.

Subsequently, a third embodiment will be described. First, a unit fixing mounting part (not shown) is implemented at a specific position. This unit fixed mounting unit is for operating a spare unit for a subscriber unit mounted at a corresponding position, and a common line implemented in a motherboard pattern is connected thereto. When the subscriber unit is mounted in the unit fixing mounting unit, the transfer unit unit 220 is not necessary and the first preliminary unit unit 250 may provide any subscriber service as in the second embodiment described above. 2 The preliminary unit unit 240 may be equipped with a subscriber unit to process the subscriber signal connected by the subscriber interface unit 210. The changeover according to the transfer control signal of the controller 270 is performed in a manner in which subscriber signals selected by each subscriber interface unit 210 and connected by common lines are connected to and processed by the unit fixing mounting unit.

As described above, in the present exemplary embodiments, the subscriber signal selected by each subscriber interface unit is transmitted by the common line, thereby reducing the number of signal lines. For example, if there are 16 subscriber interface units in the equipment and each subscriber signal is four pairs, only four pairs of common signal lines are needed in this embodiment, compared to 64 signal lines required to connect to the conventional unit selector. .

The embodiments described above are within the scope of various changes, modifications, and equivalents of the present invention. Therefore, the present invention is not limited to the description of the examples.

According to the subscriber unit multiple switching apparatus and the method of the communication system of the present invention have the following advantages.

First, it is possible to reduce the number of parts such as relays for signal selection used in the signal selection unit and the unit selection unit. Since the number of signal lines connected between the control unit and the switching unit is smaller than in the related art, the number of connectors can be reduced. It is possible to increase the efficiency of the miniaturization and space design and to realize low cost.

In addition, the present invention can be operated by mounting the spare unit anywhere in the subscriber unit unit, it is possible to variably mount the switching unit unit according to the mounting position of the spare unit.

In addition, when the subscriber unit is mounted in a specific unit fixing mounting unit and operated as a spare unit, N: 1 switching is possible even when the switching unit unit is not mounted.

Claims (8)

A plurality of subscriber interface units for interfaces to subscriber lines; A plurality of subscriber unit units for processing subscriber signals interfaced by the subscriber interface unit; A first spare unit unit having a configuration equivalent to that of the subscriber unit unit, for processing a subscriber signal selected by each subscriber interface unit under control of a control unit when the subscriber unit is switched; A switching unit unit for interfacing the subscriber lines to connect subscriber signals to a second spare unit unit and to connect a subscriber signal selected at each subscriber interface unit to a second spare unit unit under control of a controller; A second spare unit section for processing subscriber signals connected by said switching unit section; And a control unit which monitors an operation state of each subscriber unit unit and controls subscriber signal selection of each subscriber interface unit and transfer unit unit when transfer is required. The method of claim 1, Subscriber unit multiple switching device of the communication system, characterized in that the subscriber signal connected between each subscriber interface unit and the switching unit unit and the first spare unit unit is transmitted through a common line. The method of claim 1, wherein the subscriber interface unit, A transceiver for transmitting and receiving subscriber signals through the subscriber line; And a signal selector for selectively switching a signal transmission path between a common line and a subscriber unit connection line by selecting a subscriber signal according to a control signal of the control unit. The method of claim 1, wherein the switching unit unit, A transceiver for transmitting and receiving subscriber signals through the subscriber line; And a signal selector for selectively connecting a subscriber signal connected to the second spare unit to a common line or a transceiver according to a control signal of the controller. The method according to claim 3 or 4, And a control converting unit suitable for changing the voltage level of the control signal transmitted from the control unit to a level required by each signal selecting unit. Mounting a spare unit to the first spare unit and a subscriber unit to the second spare unit; Controlling the signal selection unit of the switching unit unit to connect the subscriber signal of the transceiver unit to the second spare unit unit; A control unit monitoring each subscriber unit unit to determine whether unit switching is necessary; If switching of the subscriber unit is unnecessary, controlling the signal selection unit of each subscriber interface unit to connect the subscriber signal of the transceiver unit to the corresponding subscriber unit unit; When switching of the subscriber unit is necessary, the control unit controls the subscriber interface unit which has connected the subscriber signal to the corresponding subscriber unit unit so that the subscriber signal is transmitted through the common line, and the subscriber signal connected to the common line is transferred to the first spare unit unit. And multiplexing the subscriber unit in a communication system, characterized in that it is processed by the spare unit. The method of claim 6, Mounting a subscriber unit in a first spare unit part and mounting a spare unit in a second spare unit part; Controlling the signal selection unit of the switching unit unit to perform signal selection so that the subscriber signal transmitted on the common line is connected to the second spare unit unit; When switching of the subscriber unit is necessary, the control unit controls the subscriber interface unit which has connected the subscriber signal to the corresponding subscriber unit unit so that the subscriber signal is transmitted through the common line. 2. The method of claim 1, further comprising the step of being delivered to the spare unit to be processed by the spare unit. The method of claim 7, wherein And a subscriber unit mounted in the first spare unit and a subscriber unit mounted in each of the subscriber unit units provide different kinds of subscriber services.