KR100404564B1 - Subscriber Interface Apparatus of AG System - Google Patents

Abstract

The present invention relates to a subscriber matching device of an AG system that enables a large capacity subscriber accommodation.

Conventionally, since the subscriber control unit and the subscriber line card are directly matched, the connection between the subscriber control unit and the subscriber line card should be made for each subscriber line card. Accordingly, an edge pin required for registration with a subscriber line card in the subscriber controller increases in proportion to the subscriber line card used, and thus a large capacity configuration is impossible due to the limitation of the edge pin.

According to the present invention, a subscriber control unit and a subscriber matching unit are directly matched by a high speed serial matching method, thereby accommodating a large capacity of subscribers.

Description

Subscriber Interface Apparatus of AG System

The present invention relates to a subscriber matching device of an access gateway (AG) system, and more particularly, to a subscriber matching device of an AG system for enabling a large capacity subscriber accommodation.

In general, a gateway refers to an interworking device between a network and a network. In voice over IP (VoIP), a gateway is a media gateway, that is, a voice packet input from an IP network or converting voice data for a PSTN into data for an IP network. Converts data into PSTN voice.

In the above-mentioned VoIP, gateways include Residential GateWay (RGW), Access Gateway (AG), and TG (Trunking Gateway). AG is a system that is connected to a Private Automatic Branch Exchange (PABX) and installed in a subscriber network.

1 illustrates a road, a subscriber matching unit 10, a subscriber control unit 20, a voice processing unit 30, a CN (core network) matching unit 40, and a configuration of an AG system according to an exemplary embodiment. The control unit 50 is composed of one shelf and is a small capacity AG accommodating about 1k to 2k subscribers.

In this configuration, the subscriber matching unit 10 accommodates the subscriber and performs a BORSCHT (Battery feed, Overvoltage protection, Ringing, Supervision, Coder / decoder, Hybrid, Testing) function.

The subscriber controller 20 is responsible for the control of the subscriber matching unit 10 and controls the BORSCHT function of the subscriber matching unit 10.

The voice processing unit 30 is responsible for a voice processing function required in the next generation network (NGN), that is, packetization, echo cancellation (EC), and voice resource control.

The CN matching unit 40 matches an ATM (Asynchronous Transfer Mode) or IP (Internet Protocol) network, which is a CN of the NGN, and is divided into a data matching unit and a control matching unit logically or physically.

The controller 50 is in charge of controlling the AG system under the control of a softswitch, which is a control element of the NGN.

Figure 2 is a road showing the configuration of the AG system according to another embodiment, similar to the configuration of the AG system according to the conventional embodiment shown in Figure 1, the same reference numerals for each component is used, and Detailed description will be omitted.

However, in the AG system according to another embodiment, by configuring the subscriber matching unit 10 as an independent self, it is possible to configure a large-capacity AG system.

As described above, in the AG system implemented to accommodate a large number of subscribers, when the AG system transmits a hook-off of the AG subscriber to the soft switch, the soft switch allocates the corresponding resource to the AG system. Done.

Thereafter, when the AG system transmits the incoming digit to the soft switch, the soft switch analyzes the incoming digit to control the CN and the called party. When the called party and the CN are connected under the control of the soft switch, a normal call path is established. .

In an AG system implemented to accommodate a large number of subscribers operating as described above, the subscriber matching unit 10 configured to receive a subscriber and perform a BORSCHT function is composed of a plurality of subscriber line cards. Each subscriber line card has a capacity of typically up to 32 subscribers.

Thus, in general, up to 32 subscriber line cards can be mounted per shelf, so one subscriber matching section 10 usually has a maximum capacity of 1k.

Since the subscriber matching unit 10 is made of only the subscriber line card described above, the subscriber control unit 20 has a one-to-one connection relationship with each subscriber line card, as shown in FIG. Each subscriber line card 15 generates subscriber voice data (TxData) in the CN direction, subscriber voice data (RxData) in the CN direction to the subscriber, and the subscriber matching unit 10, as shown in FIG. Subscriber signal TxControl such as hook-on / hook-off, subscriber control signal RxControl generated by subscriber controller 20, and clock signal (2MHz or 4MHz) for transmitting / receiving data / control signal ( Clock) and six matching signals such as a frame synchronization signal (8 ms) for data / control signal synchronization.

As described above, in the related art, as shown in FIG. 4, since the subscriber controller 20 and the subscriber line card 15 are directly matched, the connection between the subscriber controller 20 and the subscriber line card 15 is connected to each subscriber. It must be done for each line card 15. Therefore, an edge pin necessary for registration with the subscriber line card 15 in the subscriber control unit 20 increases in proportion to the subscriber line card 15 used, so that a large capacity is not possible due to the limitation of the edge pin. There is a problem.

For example, in order to accommodate 2k subscribers, the number of 384 edge pins (= 6x2048 / 32) required by the subscriber controller 20 to match the subscriber line card 15 is required. Accordingly, in order to accommodate 2k subscribers, the subscriber controller 20 should have 384 edge pins. If the 384 edge pins are not provided, the subscriber controller 20 cannot accommodate 2k subscribers.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and provides a subscriber matching device of an AG system that eliminates edge pin constraints of a subscriber control unit by directly matching the subscriber control unit and the subscriber matching unit by a high speed serial matching method. The purpose is.

1 is a view showing the configuration of an AG system according to a conventional embodiment.

2 is a view showing the configuration of an AG system according to another embodiment.

3 is a diagram illustrating a connection relationship between a subscriber matching unit and a subscriber control unit;

4 is a diagram illustrating an actual connection relationship between a subscriber control unit and each subscriber line card.

5 is a diagram illustrating a configuration of a subscriber matching device of an AG system according to the present invention.

Figure 6 is a view showing the configuration of a mapper / demapper applied to the present invention.

7 is an exemplary view showing the configuration of a 155.52MHz STM-1 signal applied to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

100. subscriber matching unit, 110. subscriber line card,

120, 220. mapper / demapper, 130. transmission data storage and multiplexer,

140. Transmission control data storage and multiplexer,

150. Mapper section, 160. Clock supply section,

170. Receive data storage and demultiplexer,

180. Receive control data storage and demultiplexer,

190. Demapper unit, 200, 210. Subscriber control unit

The subscriber matching device of the AG system according to the present invention for achieving the above object is provided in the subscriber matching unit multiplexes the voice and control data received from a plurality of line cards, and then mapped and transmitted to the frame signal, and received A first mapper / demapper for demapping and demultiplexing the received frame and transferring the received frame to a corresponding line card; It is provided in the subscriber control unit for controlling the subscriber matching unit to demap and demultiplex the frame received from the subscriber matching unit to transmit to the CN side, multiplexing the voice and control data received from the CN side and then mapped to the frame signal And a second mapper / demapper to be transmitted to the first mapper / demapper.

The first mapper / demapper may include: a voice multiplexer for multiplexing voice data signals received from a plurality of line cards; A control signal multiplexer for multiplexing control data signals from a plurality of line cards; A mapper unit for mapping the voice data signal and the control data signal received from the voice multiplexer and the control signal multiplexer to a frame signal and transmitting the same to the subscriber controller; A demapper unit for analyzing a frame signal received from the subscriber control unit, separating a voice data signal and a control data signal, and extracting a reference clock from the frame signal; A voice demultiplexer for demultiplexing the voice data signal received from the demapper and transmitting the demultiplexer to a corresponding line card; A control signal demultiplexer which demultiplexes the control data signal received from the demapper and transmits the demultiplexed control data signal to a corresponding line card; And a clock supply unit for generating and supplying a clock required by the subscriber matching unit based on the reference clock input from the demapper unit.

The second mapper / demapper may include: a voice multiplexer for multiplexing a plurality of voice data signals; A control signal multiplexer which multiplexes a plurality of control data signals; A mapper unit for mapping the voice data signal and the control data signal received from the voice multiplexer and the control signal multiplexer to a frame signal and transmitting the same to the subscriber matching unit; A demapper unit for analyzing a frame signal received from the subscriber matching unit and separating a voice data signal and a control data signal; A voice demultiplexer which demultiplexes the voice data signal received from the demapper; A control signal demultiplexer for demultiplexing the control data signal received from the demapper; And a clock supply unit for generating and supplying a clock required by the subscriber control unit based on a reference clock provided from a network synchronization device in charge of network synchronization of the entire AG system.

Hereinafter, with reference to the accompanying drawings will be described in detail the subscriber registration device of the AG system according to a preferred embodiment of the present invention.

5 is a road showing the configuration of the subscriber registration device of the AG system according to the present invention, the subscriber matching unit 100 and the subscriber control unit 200 is further provided with a mapper / demapper (120, 220), respectively. It is done by

In such a configuration, one side of the mapper / demapper 120 provided in the subscriber matching section 100 has a transmission data signal TxData, a reception data signal RxData, and transmission control data as shown in FIG. One-to-one connection with 32 subscriber line cards 110 through signal TxControl, reception control data signal RxControl, clock signal, and FS signal, and the other side is one of multiplexing 32 bidirectional channels The serial link (or optical link) is connected to the mapper / demapper 220 provided in the subscriber control unit 200.

On the other hand, one side of the mapper / demapper 220 provided in the subscriber control unit 200 is connected to the mapper / demapper 120 of the subscriber matching unit 100 by one serial link (or optical link), the other side is It is connected to the subscriber control unit 200 through demultiplexed matching signals (TxData, RxData, TxControl, RxControl, Clock, FS) into 32 bidirectional channels.

Here, the serial link connecting between the mapper / demapper 120 of the subscriber matching unit 100 and the mapper demapper 220 of the subscriber control unit 200 is 155.52 MHz Synchronous Transfer Mode-1 (STM-1) frequency. Can be used.

In general, the subscriber matching unit 100 is composed of 32 subscriber line cards 110, and each of the subscriber line cards 110 accommodates 32 subscribers, so that the subscriber capacity of one serial link is 1k.

Therefore, in order to accommodate a 1k subscriber, a bandwidth of 131.072Mbps, such as 65.656Mbps (64Kbps x 1024) for voice data and 65.536Mbps for control data, is required.

That is, the mapper / demapper 120 of the subscriber matching unit 100 and the mapper / demapper 220 of the subscriber control unit 200 connect 32 bidirectional data channels and 32 bidirectional data channels to a 155.52MHz STM-1 link. Multiplex / Demultiplex.

In addition, the mapper / demapper 120 and 220 cannot directly transmit a clock / FS signal, which is a synchronization signal, among the matching signals of the subscriber line card 110 on the 155.52MHz STM-1 link, so that the clock / FS signal is a synchronization signal. It has a function to extract / restore / play.

6 is a view showing the configuration of the mapper / demapper 120 implemented in the subscriber matching unit 100, the road showing the configuration of the mapper / demapper applied to the present invention.

As shown in Fig. 6, the mapper / demapper includes a transmission data storage and multiplexer 130, a transmission control data storage and multiplexer 140, a mapper 150, a clock supply unit 160, The demapper unit 190, a reception data storage and demultiplexer 170, and a reception control data storage and demultiplexer 180 are provided.

In this configuration, the transmission data storage and multiplexer 130 stores and multiplexes 32 transmission data signals TxData each having a transmission rate of 2 Mbps. Accordingly, the output of the transmission data storage and multiplexer 130 is 65.536 Mbps.

The transmission control data storage and multiplexer 140 stores and multiplexes 32 transmission control data signals TxControl each having a transmission rate of 2 Mbps. Accordingly, the output of the transmission control data storage and multiplexer 140 becomes 65.536 Mbps.

The mapper 150 maps the output 65.536 Mbps of the transmission data storage and multiplexing unit 130 and the output 65.536 Mbps of the transmission control data storage and multiplexing unit 140 to a 155.52 MHz STM-1 frame.

The demapper unit 190 separates two 65.536 Mbps signals by analyzing signals received from the mapper unit of the subscriber controller 200 through the serial link (or optical link) at 155.52 MHz STM-1, and separates the separated signals. The data is transmitted to the reception data storage and demultiplexer 170 or the reception control data storage and demultiplexer 180. The demapper unit 190 extracts an 8-kHz synchronization signal from the signal received by the 155.52 MHz STM-1 and transfers the reference clock to the clock supply unit 160.

The received data storage and demultiplexer 170 receives a 65.536 Mbps voice signal from the demapper 190 and demultiplexes the signal into 32 2.048 Mbps signals to each subscriber line card 110.

The reception control data storage and demultiplexer 180 receives the 65.536 Mbps control signals from the demapper 190 and demultiplexes the signals into 32 2.048 Mbps signals to each subscriber line card 110.

The clock supply unit 160 includes a transmission data storage and multiplexer 130, a transmission control data storage and multiplexer 140, a mapper 150, based on an 8 kHz reference clock received from the demapper 190. The demapper unit 190, the reception data storage and demultiplexer 170, and the reception control data storage and demultiplexer 180 regenerate and supply a clock and an FS signal. Here, the reference for reproducing the clock is an 8 kHz reference clock received from the demapper unit 190, and using this reference clock, 8 ㎑ / 155.52 MHz (used as the demapper unit write clock and mapper unit read clock), 8㎑ / 65.536MHz (Demapper's weather clock, receive data storage and demultiplexer write clock, receive control data store and demultiplexer write clock, transmit data store and multiplexer read clock, transmit control data store and multiplexer read Clock, used as mapper section write clock), 82.0 / 2.048MHz (receive data storage and demultiplexer read clock, receive control data storage and demultiplexer read clock, FS / clock 1 ~ 32, transmit data storage and multiplexer Generated using three types of clock generators (PLL; Phase Locked Loop), write clock, transmit control data storage and multiplexer write clock). The allocation for groups.

In the above, each component of the mapper / demapper 120 implemented in the subscriber matching unit 100 will be described. The configuration and operation of the mapper / demapper 220 implemented in the subscriber control unit 200 will be described. Since it is similar to the configuration and operation of the mapper / demapper 120 implemented in the subscriber matching unit 100, description thereof will be omitted.

However, in the mapper / demapper 220 implemented in the subscriber control unit 200, the mapper / demapper of the subscriber matching unit 100, which receives the reference clock of the clock supply unit 160 from the demapper unit 190, Unlike 120, it is provided from a network synchronizer (a device responsible for network synchronization and system synchronization of the entire AG system).

FIG. 7 is a view illustrating a configuration of a 155.52MHz STM-1 signal applied to the present invention. The 155.52MHz STM-1 signal uses 5.18 Mbps for overhead and 150.336 Mbps for payload. Can be used.

The 150.336 Mbps payload of STM-1, divided by 2.048 Mbps each, is composed of at least 64 bands (32 for voice data and 32 for control data), and 32 voice data and 32 control in each band. Allocate data.

The remaining bands are reserved and can be used for future maintenance.

Hereinafter, the operation of the subscriber matching device of the AG system according to the present invention will be described with reference to FIG.

First, a description will be given of a process of transmitting voice / control data from the subscriber to the CN direction.

The analog voice signal generated from the subscriber passes through the BORSCHT function at the subscriber line card 110 and is then loaded on the 2.048 Mbps transmission data channel and input to the transmission data storage and multiplexer 130.

As described above, in the transmission data storage and multiplexer 130 receiving 32 transmission data from the 32 subscriber line cards 110, the received 32 transmission data are multiplexed into a 65.536 Mbps signal, and the configured 65.536 Mbps. The signal is input to the mapper unit 150.

On the other hand, a voice control signal such as a hook-on / hook-off generated from the subscriber is detected by the subscriber line card 110 and loaded on the corresponding 2.048 Mbps transmission control data channel and input to the transmission control data storage and multiplexer 140. .

As described above, the transmission control data storage and multiplexer 140 receiving the 32 transmission control data from the 32 subscriber line cards 110 is configured to multiplex the received 32 transmission control data into a 65.536 Mbps signal, The configured 65.536 Mbps signal is input to the mapper unit 150.

As described above, the mapper unit 150 receiving the 65.536 Mbps signal from the transmission data storage and multiplexing unit 130 and the transmission control data storage and multiplexing unit 140 respectively transmits the transmission data storage and multiplexing unit 130. The 65.536 Mbps signals received from the control data storage and multiplexer 140 are mapped to the corresponding regions of the 155.52 MHz STM-1 frame to form a 155.52 Mbps signal, and the configured 155.52 Mbps signals are connected through a serial link (or an optical link). It transmits to a demapper unit (not shown) of the subscriber control unit 200.

In the demapper unit (not shown) of the subscriber control unit 200 that receives the STM-1 frame from the mapper unit 150 of the subscriber matching unit 100 through a serial link (or an optical link), The STM-1 frame received from the mapper unit 150 is analyzed to generate a 65.536 Mbps voice data signal and a 65.536 Mbps control data signal, and the received 65.536 Mbps voice data signal is stored in the received data and demultiplexer. Input a control data signal of 65.536 Mbps to a reception control data storage and demultiplexer (not shown).

Received data storage and demultiplexer receiving 65.536Mbps voice data from demapper unit (not shown) demultiplexes 65.536Mbps audio data received from demapper unit (not shown) into 32 2.048Mbps signals Input to a voice processing unit (not shown).

As described above, the voice data input to the voice processing unit (not shown) is transmitted to the CN via the CN matching unit (not shown).

Meanwhile, the reception control data storage and demultiplexer (not shown) receiving 65.536 Mbps control data from the demapper unit (not shown) receives 32 2.048 Mbps signals of 65.6536 Mbps control data received from the demapper unit (not shown). Demultiplexed to and input to the controller (not shown).

Meanwhile, a process of transmitting voice / control data from the CN to the subscriber will be described below.

The digital voice signal generated in the CN is input to the subscriber controller 200 through the CN matching unit (not shown) and the voice processing unit (not shown) of the AG system.

On the other hand, the subscriber control signal generated from the soft switch in the NGN is input to the control unit (not shown) through the CN matching unit (not shown), the control unit (not shown) can control the subscriber according to the command of the soft switch A subscriber control signal (ringing, CID transmission, etc.) is generated and input to the subscriber controller 200.

As described above, the voice and control data input to the subscriber controller 200 are loaded on the corresponding channel and input to the transmission data storage and multiplexer (not shown) and the transmission control data storage and multiplexer (not shown).

As described above, the transmission data storage and multiplexing unit (not shown) and the transmission control data storage and multiplexing unit (not shown), which have received voice and control data from the subscriber control unit 200, are 65.536 Mbps. A signal is configured, and the configured 65.536 Mbps signal is input to a mapper unit (not shown).

As described above, the mapper unit (not shown) which receives the 65.536 Mbps signal from the transmission data storage and multiplexer (not shown) and the transmission control data storage and multiplexer (not shown), respectively, transmits the data storage and multiplexer (not shown). And 65.536 Mbps signals received from the transmission control data storage and multiplexer (not shown), respectively, to the corresponding region of the 155.52 MHz STM-1 frame to form a 155.52 Mbps signal, and the configured 155.52 Mbps signal is serial-linked (or Optical link) to the demapper unit 190 of the subscriber matching unit 100.

The demapper unit 190 of the subscriber matching unit 100 receiving the STM-1 frame from the mapper unit (not shown) of the subscriber control unit 200 through a serial link (or an optical link) is a mapper of the subscriber control unit 200. Analyzing the STM-1 frame received from the secondary (not shown) to generate a 65.536 Mbps voice data signal and 65.536 Mbps control data signal, and receives the generated 65.536 Mbps voice data signal storage data and demultiplexer 170 ) And a control data signal of 65.536 Mbps to the reception control data storage and demultiplexer 180.

Received data storage and demultiplexer 170 receiving 65.536 Mbps voice data from the demapper unit 190 demultiplexes the 65.536 Mbps voice data received from the demapper unit 190 into 32 2.048 Mbps signals. Input to line card 110.

Meanwhile, the reception control data storage and demultiplexing unit 180 receiving 65.536 Mbps control data from the demapper unit 190 demultiplexes the 65.6536 Mbps control data received from the demapper unit 190 into 32 2.048 Mbps signals. Input to the subscriber line card 110.

As described above, the subscriber line card 110, which has received 2.048 Mbps of voice data and control data from the reception data storage and demultiplexer 170 and the reception control data storage and demultiplexer 180, receives the received voice data. And control data to the subscriber.

As described above, when the subscriber control unit 200 and the subscriber matching unit 100 are directly matched, unlike when the subscriber control unit 200 requires 384 edge pins when accommodating 2k subscribers, In the present invention, only four edge pins are required (= 2 x 2; when a differential signal is used for each direction).

The subscriber matching device of the AG system of the present invention is not limited to the above-described embodiment, and can be implemented in various modifications within the range allowed by the technical idea of the present invention.

According to the subscriber matching device of the AG system of the present invention as described above, the subscriber control unit and the subscriber matching unit are directly matched by the high speed serial matching method, thereby accommodating a large capacity of subscribers.

Claims (5)

In an AG system in which the subscriber matching unit is configured as an independent shelf, A first mapper provided in the subscriber matching unit for multiplexing voice and control data input from a plurality of line cards, mapping and transmitting the received signal to a frame signal, and demapping and demultiplexing the received frame and transmitting the same to a corresponding line card; A demapper; It is provided in the subscriber control unit for controlling the subscriber matching unit to demap and demultiplex the frame received from the subscriber matching unit to transmit to the CN side, multiplexing the voice and control data received from the CN side and then mapped to the frame signal And a second mapper / demapper for transmitting to the first mapper / demapper. The method of claim 1, wherein the first mapper / demapper, A voice multiplexer for multiplexing voice data signals received from a plurality of line cards; A control signal multiplexer for multiplexing control data signals from a plurality of line cards; A mapper unit for mapping the voice data signal and the control data signal received from the voice multiplexer and the control signal multiplexer to a frame signal and transmitting the same to the subscriber controller; A demapper unit for analyzing a frame signal received from the subscriber control unit, separating a voice data signal and a control data signal, and extracting a reference clock from the frame signal; A voice demultiplexer for demultiplexing the voice data signal received from the demapper and transmitting the demultiplexer to a corresponding line card; A control signal demultiplexer which demultiplexes the control data signal received from the demapper and transmits the demultiplexed control data signal to a corresponding line card; And a clock supply unit for generating and supplying a clock required by the subscriber matching unit based on a reference clock input from the demapper unit. The method of claim 1, wherein the second mapper / demapper, A voice multiplexer for multiplexing a plurality of voice data signals; A control signal multiplexer which multiplexes a plurality of control data signals; A mapper unit for mapping the voice data signal and the control data signal received from the voice multiplexer and the control signal multiplexer to a frame signal and transmitting the same to the subscriber matching unit; A demapper unit for analyzing a frame signal received from the subscriber matching unit and separating a voice data signal and a control data signal; A voice demultiplexer which demultiplexes the voice data signal received from the demapper; A control signal demultiplexer for demultiplexing the control data signal received from the demapper; And a clock supply unit for generating and supplying a clock required by the subscriber control unit based on a reference clock provided from a network synchronization device in charge of network synchronization of an entire AG system. The method of claim 1, wherein the second mapper / demapper, Subscriber matching device of the age system, characterized in that the one-to-one correspondence with the number of subscriber matching unit is installed. The method of claim 1, wherein the first mapper / demapper and the second mapper / demapper, Subscriber matching device of an age system, characterized in that connected by a 155.52MHz STM-1 link.