KR100325060B1 - Full electronic switching system capable of accepting adsl subscribers - Google Patents

Abstract

The present invention relates to an electronic switch that can accommodate all the ADSL subscribers as well as the general telephone subscribers in one switch, and can handle each call in one system, ASS-T (Access Switching Subsystem-Trunk), ASS -Voice call processing area that handles voice calls to regular subscribers, including Access Switching Subsystem-Subscriber (S), Interconnection Network Subsystem (INS), and Central Control Subsystem (CCS); Digital Subscriber Line Interface (DSLI) that performs matching function with upper multiplexing block, Time Switch and Link (TSL) that performs voice call connection function in subsystem, Control data and call for control of ADSL subscriber Management Service Component Interface (MSCI), which provides a path for processing data, matching with multiplexed links of the ADSL subscribers themselves, and matching with ATM access networks Digital Subscriber Line Access Multiplexor (DMDI) Mux & Demux Interface Block (DMDI), and Message Processor / Telephony Processor (MP / TP), which controls the subsystem, to handle calls to ADSL subscribers. By further including ASS-A (Access Switching Subsystem-ADSL), the maintenance system of ADSL subscribers and landline subscribers can be integrated into one.

Description

FULL ELECTRONIC SWITCHING SYSTEM CAPABLE OF ACCEPTING ADSL SUBSCRIBERS}

The present invention relates to an electronic switchboard, and more particularly, to an electronic switchboard that can accommodate Asymmetric Digital Subscriber Line (ADSL) subscribers as well as voice call processing for general subscribers.

As is well known, ADSL is a technology that enables high-speed data communication as well as general voice calls through existing telephone lines. Although it varies depending on the transmission distance and the equipment, the downlink speed from the telephone station to the subscriber is 32 Kbps to It is 8Mbps and supports up to 32Kbps to 640Kbps from subscriber to telephone station.

On the other hand, in the related art, for example, a conventional general electronic switch, for example, the TDX-100, an access switching subsystem (ASS-S), a trunk matching subsystem (ASS-T: Access Switching Subsystem- It consists of Trunk, Interconnection Network Subsystem (INS) and Central Control Subsystem (CCS) to perform call processing and various additional functions for general telephone subscribers.

If the conventional general electronic switching center accommodates the ADSL subscriber and enables high-speed data communication as well as general telephone service in one exchange, the cost for implementing the conventional ADSL switching system can be reduced. This will improve the economics of the service provider.

Accordingly, the present invention has been made in view of the above-described point, and an object thereof is to provide an electronic switch that can handle each call by accommodating both the general telephone subscriber and the ADSL subscriber in one exchange.

The present invention according to an embodiment for achieving the above object, in the electronic switch that can accommodate the ADSL subscriber, the electronic switch, ASS-T (Access Switching Subsystem-Trunk), ASS-S (Access It handles voice calls for regular subscribers, including Switching Subsystem-Subscriber, Interconnection Network Subsystem (INS), and Central Control Subsystem (CCS), and DSLAM (DSLAM), which enables simultaneous voice and data calls to ADSL subscribers. In order to accommodate the Digital Subscriber Line Access Multiplexor, and to enable simultaneous processing of voice signals and ADSL data, a splitter is accommodated in a single subscriber board.

The present invention according to another embodiment for achieving the above object, in the electronic switch that can accommodate the ADSL subscriber, the electronic switch, ASS-T (Access Switching Subsystem-Trunk), ASS-S (Access It handles voice calls for regular subscribers, including Switching Subsystem-Subscriber, Interconnection Network Subsystem, and Central Control Subsystem (CCS), performs the matching function of ADSL subscribers, and performs the matching function with higher multiplexing blocks. Digital Subscriber Line Interface (DSLI), Time Switch and Link (TSL) that performs voice call linking function in the subsystem, and MSCI (Providing a path of control data and call processing data for controlling the ADSL subscriber) Digital Subscriber Line Access Multiplexor (DMDI) Mu that functions as a management service component interface (AMD), matching with the multiplexing link of the ADSL subscriber self, and matching with an ATM access network. and an Access Switching Subsystem-ADSL (ASS-A) configured to process a call to an ADSL subscriber, comprising an x & demux interface block (MP) and a message processor / telephony processor (MP / TP) serving as a control function in the subsystem. Provided is an electronic switchboard capable of handling ADSL subscribers.

1 is a block diagram illustrating a structure interworking with an ATM network to enable an electronic switch to accommodate an ADSL subscriber according to a preferred embodiment of the present invention;

2 is a view illustrating a data call processing process in the ASS-A shown in FIG. 1 to accommodate an ADSL subscriber according to the present invention;

3A to 3D are diagrams showing a structure and a self structure of the DSLI and the DMDI shown in FIG. 2, respectively.

<Description of the symbols for the main parts of the drawings>

110: Central Control Subsystem (CSS)

120: INS (Interconnection Network Subsystem)

130: ASS-T (Access Switching Subsystem-Trunk)

140: ASS-S (Access Switching Subsystem-Subscriber)

150: ASS-A (ASS-S: Access Switching Subsystem-ADSL)

Hereinafter, preferred embodiments of the present invention will be described in detail.

First, in order to process voice and data calls, as well as voice telephone service of a public public telephone network (PSTN), a conventional general electronic switchboard uses an analog subscriber line, a subsystem called ASS-A (Access Switching Subsystem-ADSL). Implement the Digital Subscriber Line Access Multiplexor (DSLAM) hardware in your organization and supplement some of the operational and maintenance software to manage it.

In addition, the above-described implementation of the DSLAM hardware provides a splitter function so that voice and data calls can be processed on one board to an ADSLB (ADSL Board) of a DSLI (Digital Subscriber Line Interface) that matches an ADSL indoor device of a subscriber. Echo canceling, filtering, and data interleaving must be implemented in order to remove the noise introduced when matching with the premises equipment, and according to the modem type of the subscriber premises equipment. Dynamic routing functions must be implemented in ASICs or FPGAs for variable operation in the form of ATM or TCP / IP.

In order to satisfy this function, it is designed to be controlled by hardware or application, and when a call received from a subscriber is a voice call, it is connected to a local time switch. An internal high-speed common bus (or cell bus) that can process data with the DS3 line termination board (D3LT) that performs multiplexing functions is implemented for call processing traffic.

Here, the D3LT board must satisfy the G.704 multiplexing level of SDH (Synchronous Digital Hierarchy) standard for matching with the D3NT (DS3 Network Termination), which is the higher-level multiplexing board, and the GFC (Generic) to control traffic during call processing. The function of Flow Control must be implemented, and HEC (Header Error Control) detection function must be implemented for link error detection.

In addition, the monitoring function of the Virtual Path Identifier / Virtual Channel Identifier (VPI / VCI) for virtual path setting is essential, and the adoption of On Board Controller (OCC) is inevitable to accommodate all these functions.

On the other hand, the implementation of DSLAM's adaptation technology for accepting ADSL subscribers in conventional electronic switchboards, for example, the TDX-100 system, is implemented by G.DMT-based domestic / international standardized modulation schemes. In preparation for the causes of various noises, the implementation of echo-cancellation and filtering functions must be implemented. The functions and actions of the multiplexing procedures are standardized recommendations (G.704, G.992.1, G.992.2) must be satisfied.

1 is a block diagram illustrating a structure interworking with an ATM network to enable an electronic switch to accommodate an ADSL subscriber in accordance with a preferred embodiment of the present invention, and the electronic switch 100 according to the present invention is CSS 110. , INS 120, ASS-T 130, ASS-S 140, and ASS-A 150.

Here, CSS (110), INS (120), ASS-T (130), ASS-S (140) performs the same function as the respective constituents provided in the conventional general electronic switch to the general telephone subscriber It is a means provided for providing call processing and various additional services, and ASS-A 150 is a configuration means separately added to accommodate an ADSL subscriber according to the present invention as described above.

In addition, the ASS-A 150 performs a matching function of a subscriber and performs a matching function with a higher multiplex block, a TSL performing a voice call connection function within a subsystem, and control data for controlling the switch. And a Management Service Component Interface (MSCI) providing a path for call processing data, a DMDI for matching subscriber self-multiplexing links and an ATM access network, and an MP / TP for controlling functions in the subsystem. (Message Processor / Telephony Processor) is configured to perform call processing for ADSL subscriber.

That is, the ASS-A 150 includes a DSLI block for processing voice data and ADSL data, and a DMDI block for adjusting 155M multiplexing and aggregation functions of an ADSL subscriber, and the ASS-A 150 includes conventional voice processing. The TSL block acts as a switch and the control processor block is matched.

FIG. 2 is a diagram illustrating a process of processing voice and data calls of the ASS-A 150 added by the electronic switch 100 of FIG. 1 to accommodate an ADSL subscriber according to the present invention. 3A is a diagram showing a self-structure of the DSLI shown in FIG. 2, FIG. 3B is a diagram showing a structure of a DSLI block, FIG. 3C is a self-structure of a DMDI, and FIG. 3D is a structure of a DMDI. Figure is shown.

Referring to each electronic device according to the present invention in detail with reference to the drawings as follows.

First, ADSLB (ADSLB # 0 to ADSLB15) configured in each DSLI (DSLI # 0 to DSLI # 3) shown in FIG. 2 is implemented to handle 8 subscribers per board, and a D3LT board is a DS3 link per sheet. One is accommodated and ADSL Device Control Board (ADBCB) which manages self-management is matched with TP (Telephony Processor) and Heat-Bus (Control Processor Board) related to state management and call processing with higher processor. Send and receive messages. Here, ADSLBB (ADSLBB) that accommodates DSLI can accommodate 128 subscribers and is designed to accommodate 16 ADSLBs, 2 ADCBs, and 2 D3LT boards.

In addition, ATM cells are multiplexed with 155M optical matching boards by matching with D3LTs of DSLI blocks, and in order to implement the aggregation function of the ADSL subscriber matching device of the host, the DMDI block can be changed efficiently according to the number of board mountings in the hardware design. It accommodates traffic-controlled backboard design and control, and enables applications to set up cell multiplexing routes by checking the hardware's link establishment capabilities according to traffic. In addition, since the exchange accommodates a large number of subscribers, the access link is designed with redundancy in consideration of link reliability.

In designing the DSLI block, the D3NT is designed to accommodate two links to ensure the reliability of the internal interface when interworking with a Synchronous Transfer Mode Interface Board (STMI), and STMI accommodates one 155M ATM mode matching port. This is also implemented by redundancy.

As a result, DSLI performs ADSLB, which performs line matching with ADSL subscriber, D3LT which generates DS3 multiplexed signal and matches DS3 board of upper DMDI through ATM cell multiplexing process, and self-control of each board. It consists of ADCB board that is in charge of function, and DMDI receives lower first multiplexing signal to perform second multiplexing function for matching with ATM access network.

In addition, DMDI receives DSLI's primary multiplexing signal and performs ST3 (DS3 Network Termination), which performs cell rearrangement and retrieval for secondary multiplexing, and STMI (high-speed cell bus). It consists of Synchronous Transfer Mode Interface (ADB) board and ADCB (ADSL Device Control Board) which is in charge of self-control.

Meanwhile, the D3NT in the DMDI block analyzes the data stream received from the D3LT, performs error control accordingly, and realigns the 155M ATM frame using an internal high speed cell bus and transmits the data to the ATM access network. Follow the reverse of this.

Here, in order to implement each of the above functions, it is effective to accommodate a common bus structure of Utopia, which is a common bus inside a DSLI block, and to implement a high speed cell bus to enable high-speed data processing of a DMDI block. It is essential. In addition, the internal high-speed cell bus implements Tx_DATA 16 bits, Rx_DATA 16 bits, and internal interrupt control data (Control_Data) about 8 bits to enable high-speed processing of internal control and cell multiplexing. The in-circuit configuration can reduce call processing delays inside the system to ensure minimum quality of service (QoS).

As a result, Figures 2 and 3A-3D show an all-electronic exchange system designed in an optimal state in accordance with the present invention in order to be able to implement each of these functions.

On the other hand, the capacity of the DSLI / DMI block in the system is determined according to the number of ports of the processor board, and can accommodate at least 6000 subscribers and currently cascades Hit-Bus. When configured in 4 self units, it can accommodate more than 24000 subscribers.

And, ADSL board can process voice and data call of at least 8 subscribers, and subscriber's call processing is connected to local switch of TSL block in case of voice call through filter at splitter of first subscriber matching stage. In this case, ATM cell processing is performed through the internal DSP chip. If there is no problem as a result of the error review, the connection is made through the DMDI block to the network. All state processing and results during this process are reported via HitBus to the TP via the ADCB control board.

As described above, according to the present invention, by constructing a separate DSLAM system for the service type of the conventional ADSL subscriber, it is possible to integrate the maintenance into one system by configuring the subsystem in the exchange. At the same time, it is possible to drastically improve the economics of the service provider by changing the disadvantages of the conventional system, which can only handle a small amount of subscribers, into a form capable of operating at least 6000 or 24000 subscribers.

Claims (6)

In an electronic switch that can accommodate an Asynchronous Digital Subscriber Line (ADSL) subscriber, The electronic switch includes a voice for a general subscriber including an access switching subsystem (Trunk), an access switching subsystem (ASS-S), an interconnection network subsystem (INS), and a central control subsystem (CCS). Handle calls, To accommodate the Digital Subscriber Line Access Multiplexor (DSLAM), which enables simultaneous processing of voice and data calls for ADSL subscribers, and to accommodate the splitter within one subscriber board to enable simultaneous processing of voice signals and ADSL data. An electronic switchboard that can accommodate ADSL subscribers. 2. The electro-electronics exchange according to claim 1, wherein the electro-electronics exchanger is a TDX-100 exchange. In an electronic switch that can accommodate an Asynchronous Digital Subscriber Line (ADSL) subscriber, The electronic switch includes a voice call to a general subscriber, including an access switching subsystem (Trunk), an access switching subsystem (ASS-S), an interconnection network subsystem (INS), and a central control subsystem (CCS). To process Digital Subscriber Line Interface (DSLI) that performs the matching function of ADSL subscribers and is responsible for the matching function with higher multiplexing blocks; A time switch and link (TSL) that performs voice call linkage within the subsystem; A management service component interface (MSCI) providing a path of control data and call processing data for controlling the ADSL subscriber; Digital Subscriber Line Access Multiplexor (DMLA) Mux 7 Demux Interface Block (DMDI) for matching the ADSL subscriber self with the multiplexed link and with the ATM access network; ADSL subscriber processing further comprising an Access Switching Subsystem-ADSL (ASS-A) configured to process a call for an ADSL subscriber, which is composed of a Message Processor / Telephony Processor (MP / TP) serving as a control function in the subsystem. Possible electronic exchanger. The method of claim 3, wherein The DSLI generates a DS3 multiplexed signal through an ADSLB (ADSL Board) that performs line matching with the ADSL subscriber and an ATM cell multiplexing process, and performs a function of matching a DS3 board of a higher DMDI with a DS3 line termination (D3LT). And, it consists of ADCB (ADSL Device Control Board) board that is responsible for the self-control function of each board, The DMDI is capable of accommodating an ADSL subscriber, characterized in that to perform a secondary multiplexing function for matching with an ATM access network by receiving a lower primary multiplexing signal. The method of claim 3, wherein the electron exchanger, The STDI receiving the first multiplexed signal of the DSLI and performing matching with an ATM access network via a DS3 Network Termination (D3NT) for performing a cell rearrangement and search function for a second multiplexing and a high-speed cell bus An electronic switch that can accommodate an ADSL subscriber, comprising a Synchronous Transfer Mode Interface (ADB) board and an ADCSL (ADSL Device Control Board) for self-control, and wherein the secondary multiplexing structure is a DMDI centralized structure. . 6. The electrical exchanger as claimed in claim 3, wherein the electrical exchanger is a TDX-100 exchanger.