KR20070108678A - Alarm recognition system troubling e1 circuit and thereof method - Google Patents

Abstract

A system for detecting a fault section of a transmission line in an E1 unit and a method thereof are provided to trace a correct fault position of a section when a fault occurs in a specific section, thereby quickly performing the operation and maintenance of the transmission line and minimizing a service interruption time. A method for detecting a fault section of a transmission line in an E1 unit comprises the following steps of: allowing a home exchanger to transmit hop count 1 to a device in a section(S100); allowing each device by section to add one to the received hop count and transmit the hop count to a next device(S110); and allowing a foreign exchanger to detect a fault section by using the number of the received hop count(S120).

Description

Alarm recognition system troubling E1 circuit and algorithm method for E1 unit transmission path

1 is a schematic configuration diagram of a system for identifying a failure in a transmission section when a failure occurs in an E1 unit transmission path according to the present invention.

2 is a flow chart for identifying the failure of the transmission section when the E1 unit transmission failure occurs in accordance with the present invention.

3 is a schematic configuration diagram of a system showing an embodiment of a case where a transmission line failure occurs in the present invention.

<Description of the code | symbol about the main code of the drawing>

100: mark exchanger 200: mux

300: light station station 400: light station station

500: MUX 600: Power Exchange

700: transmission line 1000: mark

2000: Power

In the present invention, in the wired / wireless communication using the E 1 unit transmission line, when the E 1 line failure occurs as a transmission line, only the alarm details (that is, a failure) can be known, and the fault location is not known. It relates to the invention to grasp.

Examples of technologies include Publication No. 2003-0097258 (Long Range Optical Surveillance System) and Publication No. 10-2005-0119015 (Real Time Optical Cable Surveillance System). The prior art has been to monitor the failure of long-distance optical paths between optical stations.

However, this invention only monitors the failures between the optical end stations, but only detects the failure of all E1 lines connecting between the transmitting part consisting of the transmitting exchange, transmitting mux, transmitting optical end station and the receiving part consisting of the receiving exchange, receiving mux, and receiving optical end station. There was a problem that could not be.

In addition, the current mobile communication or wired communication can only know the alarm details (that is, the occurrence of a failure) when a line failure occurs, it is not possible to know the location of the failure, so the quick trouble shooting is performed due to the hassle of performing the test one by one at several points. There was a delay.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to introduce a concept of a hop count when an E1 unit transmission failure occurs so that the circuit failure section can be predicted at a time, thereby accurately identifying the failure section. .

As a technical idea for achieving the object of the present invention, in the present invention, in the failure section detection method of the E1 unit transmission path having a plurality of devices between the local exchange and the exchange exchange, the apparatus of the section in the local exchange Transmitting a hop count 1 to the apparatus, transmitting a hop count 1 to the next apparatus by adding 1 to the hop count received at each apparatus for each section, and detecting a fault interval as the number of hop counts received at the exchange. The invention is presented.

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment of the present invention will be described in detail.

1 is a system configuration diagram for identifying a fault section by adding a HOP count when an E1 unit transmission path failure according to the present invention.

As shown in Figure 1, the present invention, the mobile switching center (MSC) (100, 600), mux (Mux, multiflexer) (200, 500), optical end station (300, 400), transmission path 700 It is configured to include. That is, the present invention relates to a station 1000 including a local exchange and each segment device MUX, a light-end station, and a large station 2000 including a country exchange device for receiving information or a signal, and a mux and light-end station each section device, and It is composed of a transmission path (700).

In the present invention, in the fault section detection system of the E1 unit transmission path having a plurality of devices between the local exchange and the exchange, the fault section is detected as the number of hop counts received by transmitting hop count 1 to the devices in the section. An exchanger; A mux, which binds a plurality of transmission lines of the exchanger to one of the optical end stations and adds 1 to a hop count received from a device in a section and sends the result to the next device in the section; The invention relates to a fault section detection system of an E1 unit transmission path, which is connected to the MUX and comprises an optical end station which is added to a hop count received from a device in a section and sent to the next device of a large station.

The switching center (MSC) (100, 600) is provided with a visitor location register (VLR), and works in conjunction with the home location register to handle mobile communication subscriber calls. In addition, the exchange 400 connects to the base station controller to perform a call setup and release function of the mobile communication terminal, and performs various functions related to call processing and additional service.

Visitor Locator (VLR) is a database that temporarily stores subscriber information related to a mobile communication terminal while the mobile communication terminal is in an area controlled by the visitor location register (VLR). The information of the mobile communication terminal and subscriber is taken from the home location register, temporarily stored, and mounted in the switching center.

In general, the exchange includes call processing and additional service processing of mobile subscribers, personal communication application protocol processing, handover control between base station controllers, handover control of personal communication switching periods, interworking between different mobile networks, network synchronization, self Responsible for operational maintenance, visiting subscriber registration, location update, billing, management and allocation of wired channels.

The multiplexers 200 and 500 are also referred to as muxes as multiplexing devices in digital communication. The mux is a data selection logic circuit that performs a function of selecting one input signal among signals input from a plurality of circuits and loading the same into an output circuit, and also means a communication device employing the same. Mux (Multixer) allows multiple devices to share a single dedicated line.

For example, when several terminals are connected to the main computer, connecting them to each communication line is expensive and difficult to manage. Therefore, each terminal connection terminal is bundled and connected to the communication line.

In the main computer, the transmission line is connected to the MUX by the number of connected terminals and from there, only one line is connected to the transmission line through the modulation / demodulation device (modem). On the other hand, one transmission line is connected to the terminal side mux through a modem, and then branched as many lines as the number of terminals to be connected to each terminal.

MUX is a communication equipment used when using a telephone line as a communication medium with a modem, which simplifies network configuration and management and greatly reduces communication costs. Generally, STDM (statistical time division method) or TDM (time division method) is used to share a communication channel and is installed between a modem and a terminal.

In the past, STDM mux, which supports data transmission from 19.2kbps to 56kbps, can be used.However, due to the drawback of not being able to implement voice and data together, it has recently secured high-speed transmission sections as well as telephone, fax and video conferencing systems. T1 class mux, which combines various communication networks with data communication networks, is a generalized trend.

 At the point where the optical cable and the coaxial cable are in contact with each other, there should be a device that converts the optical cable and the coaxial cable into interconnectable signals. This point is called an optical network unit (ONU) (300,400).

The line connecting the exchanger, the mux, and the optical end station is called a dedicated line, an E line, a transmission line, or a transmission line according to a physical meaning or an ideological meaning to those skilled in the art. The transmission line 700 may be a physical coaxial cable or an optical cable. The transmission line is one of E 1 or T 1 as a standard for information transmission.

The E-1 is a European digital transmission standard devised by ITU-T and named by the European Postal and Communication Operations Conference (CEPT), which corresponds to the T-1 format of North America. E-2 through E-5 are transmission media that increase in multiples of the E-1 format.

The E-1 signal format accepts 32 channels at 64 Kbps, enabling data transmission at 2.048 Mbps. E-1 has a slightly higher data rate than T-1 because, unlike T-1, all 8 bits of each channel are used to encode the signal. E-1 and T-1 can be interconnected for international use.

 Class-T line systems were introduced by Bell Systems in the 1960s and were the first successful systems to support digital voice transmission. T-1 lines, originally at 1.544 Mbps, are commonly used today for Internet access by Internet service providers, and T-3 lines that support 44.736 Mbps in different grades are also widely used by Internet service providers. Used. Among other services is a fragmentary T-1 line, which borrows some of the 24 channels of the T-1 line and does not use the remaining channels.

Class T circuit systems are fully digital circuits using digital code code modulation and time division multiplexing (TDM). The system uses four strands, which provide full duplex capability by assigning two strands to receive and two strands to transmit. The T-1 digital stream is multiplexed with 24 64 Kbps channels (the standardized 64 Kbps channel is based on the bandwidth required for voice telephony). The four wires were originally twisted with a pair of copper wires, but now coax, optical, digital microwave and other media can all be used. Many variations are possible depending on the number or use of channels.

The present invention is an invention to identify the fault interval by adding the HOP count when the E 1 unit transmission line failure in the wired and wireless communication using the E 1 line. The present invention can be used equally in class T lines.

2 is a flow chart for identifying the failure of the transmission section when the E1 unit transmission failure occurs in accordance with the present invention.

First, the home exchange transmits hop count 1 to the device in the section (S100). 1 is added to the hop count received at each device of each section of the own country and transmitted to the next device (S110). The failure section is detected as the number of hop counts received from the power exchange (S120).

If no failure occurs in the present invention, that is, if the E1 line is normally connected, the local exchange sends HOP COUNT 1 to the next device of the section mux and adds 1 to the optical station, the next device of the section. The optical end station of the station 1000 adds 1 to the optical end station of the large station 2000. If you add one by one like this, the exchange will eventually receive HOP COUNT 5.

Figure 3 is an embodiment of the case of a failure in the transmission line in the present invention. If (B) failure occurs in the section transmission, the optical station 300 does not receive normal HOP COUNT 2 and receives only the LOCAL alarm. Therefore, 0 + 1 is set to the optical station 400 of the large station 2000 and HIS COUNT 1 is AIS. Together with the other end of the group. In this case, HOP COUNT 3 is received at the final exchange, so it can be seen that a failure has occurred at (B).

At this time, the exchange will display a remote alarm to the local exchange. At this time, the received HOP COUNT 3 will be sent together with the REMOTE alarm. have. As the fault section can be immediately known, it is possible to grasp the fault section of the transmission line without performing the LOOP for each section.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. Therefore, the exemplary embodiments described above are exemplary in all respects and are not intended to be limiting.

As described above, the present invention is to speed up the preservation operation of the transmission path by grasping the exact location of the failure when a specific section failure occurs in the long transmission section of the local exchange ~ mux ~ optical end station ~ optical end station ~ mux ~ power exchange It provides the effect of minimizing downtime.

Claims (10)

In the failure section detection method of the E1 unit transmission path having a plurality of devices between the local exchange and the local exchange, Transmitting hop count 1 from the local exchange to a device in a section; Transmitting 1 to the next device by adding 1 to the hop count received from each device for each section; and And detecting a fault section as the number of hop counts received by the exchange. The method according to claim 1, The E1 unit transmission path failure section detection method of the E1 unit transmission path, characterized in that at least one of the optical cable or coaxial cable. The method according to claim 1, And the switch is at least one of a wired switch or a mobile switch. The method according to claim 1, And wherein the E1 unit transmission path is at least one of a circuit network cable and a packet network cable. The method according to claim 1, The mux is any one of the STDM (statistical time division method) or TDM (time division method) characterized in that the failure interval detection method of the E1 unit transmission path. In the failure section detection system of the E1 unit transmission path having a plurality of devices between the local exchange and the local exchange, A switch for transmitting a hop count 1 to a device in the section and detecting a fault section as the number of received hop counts; A mux, which binds a plurality of transmission lines of the exchanger to one of the optical end stations and adds 1 to a hop count received from a device in a section and sends the result to the next device in the section; And an optical end station connected to the mux and configured to add 1 to a hop count received from a device in a section, and to send it to the next device of a large power station. The method according to claim 6, The E1 line is at least one of the optical cable or coaxial cable fault section detection system of the E1 transmission line. The method according to claim 6, The switch is a failure interval detection system of the E1 unit transmission line, characterized in that at least one of the switch of the wired communication or the switch of the mobile communication. The method according to claim 6, The E1 line is at least one of a circuit network cable or a packet network cable fault section detection system of the E1 transmission line. The method according to claim 6, The mux is any one of the STDM (statistical time division method) or TDM (time division method) fault section detection system of the E1 unit transmission path.

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