KR20020042147A - Interface System And Method For Voice and Data - Google Patents

Abstract

PURPOSE: A system and method for matching a voice and data is provided to decrease the load of premise wire and easily offer a voice service by a high-speed data subscriber unit, and save cost according to the purchase of a matching system by installing a system for performing a voice and data matching function in not custom premise but in-plant in common. CONSTITUTION: An embedded type IAD(Integrated Access Device)(20) is installed in an in-plant in which a DSLAM(Digital Subscriber Line Access Multiplexer)(40) is located in common, and provides a VoDSL(Voice over Digital Subscriber Line) matching function to a subscriber terminal for providing a voice and high-speed data service. A VoDSL gateway(50) is matched with a PSTN/ISDN(Public Switched Telephone Network/Integrated Services Digital Network) to a subscriber connected through the embedded type IAD(20) and the DSLAM(40) and provides a voice service matching function, or is matched with an IP(Internet Protocol) or ATM(Asynchronous Transfer Mode) network and provides a voice and high-speed data service matching function.

Description

Interface System And Method For Voice and Data

The present invention relates to a voice and data matching system and method, and more particularly, to install voice IAD for VoDSL matching in a premises rather than a subscriber's premises, and to provide voice and high-speed data service through a packet-based core network without installing a separate 5-class switch. It relates to a voice and data matching system and method to provide a.

Recently, services that integrate voice and high-speed data have been developed. For example, voice and voice services are provided to Plain Old Telephone Service (POTS) voice subscribers and x-type Digital Subscriber Line (xDSL) subscribers. An xDSL service is provided through voice and high-speed data matching by placing an integrated access device (IAD), which is an xDSL subscriber receiving terminal providing high-speed data service, in a subscriber's home. This conventional xDSL service system, as shown in Figure 1 attached to provide xDSL voice and high-speed data service, various subscriber terminals (PC, POTS, fax, modem, etc.) installed in the subscriber's home, splitter ( A Splitter 11 and an IAD 12, a Digital Subscriber Line Access Multiplexer (DSLAM) 13 installed in the premises, and a Voice over Digital Subscriber Line (VODSL) gateway 14 on the carrier side.

The splitter 11 is located between the subscriber station and the IAD 12 to separate voice and high-speed data transmitted from the subscriber station, and the IAD 12 is located in the subscriber's premises for xDSL for high-speed DSL subscriber matching. It provides a matching function, an ATM matching function for DSLAM 13 matching and a management port matching function for subscriber maintenance based on the voice processing unit of the POTS subscriber.

The DSLAM 13 matches the high-speed data separated by the IAD 12 installed in the subscriber's premises to the ATM access network and the VoDSL gateway 14, and the general voice is connected to the public switched telephone network (PSTN) / ISDN through the telephone line. It is matched with an Integrated Services Digital Network (VOID) network, and its VoDSL gateway 14 handles routing and authentication-related protocols for high-speed data traffic matched by the DSLAM 13, thereby providing Internet Protocol (IP) or Asynchronous Transfer (ATM) Mode) Match the network.

In the conventional xDSL service system configured as described above, the IAD 12 installed in the subscriber's premises is designed based on the xDSL / ATM matching function of a small office home office (SOHO) unit, which is a low pass filter (LPF) and a high pass (HPF). Filter) and receives the POTS voice subscriber and xDSL ultra-high speed data subscriber through the splitter 11, the LC filter located in front of the IAD 12, and then the POTS voice through the DSLAM 13 connected to the next stage of the IAD 12. In this case, the LPF in the DSLAM (13) is matched with the PSTN / ISDN network, which is a 5 class switch, to provide voice service, and the high-speed data is transmitted through the ATM access network and the VoDSL gateway (14) to the DS3 / STM1 / STM4 Ethernet. This is to match with IP or ATM network and provide the corresponding high speed data service.

As described above, conventionally, the subscriber capacity is limited to SOHO units by configuring the IAD 12 that provides the xDSL service subscriber matching function in the in-home wiring to provide voice and high-speed data service. When providing new subscribers, POTS voice and high-speed data were provided together, so there was a disadvantage that only voice services could be provided to xDSL subscribers providing existing high-speed data services.

As the IAD 12 providing the subscriber matching function of the xDSL service is configured in the subscriber's premises, the service provider has a burden of wiring in the home, and the subscriber has a burden of cost increase due to the purchase or lease of the IAD.

In addition, since the voice must be configured to be processed in the PSTN / ISDN network via the DSLAM 13, the communication service provider has a disadvantage in that a 5-class switch must be installed in order to accommodate the voice subscriber.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The object of the present invention is to install a system for performing voice and data matching functions in the premises rather than in the subscriber's premises, thereby reducing the burden of premises wiring and existing service. It is to facilitate the provision of high-speed data subscriber unit voice service, and the subscriber can obtain the cost savings by purchasing a matching system.

In addition, the present invention implements a built-in voice and data matching system commonly installed in the DSLAM and the premises, so that the service provider can accommodate a new voice subscriber through the ATM network without the installation of a five-class switch, etc. for voice service For that purpose.

1 is a diagram showing a structure for providing voice and high speed data services in a conventional xDSL service system.

2 is a diagram illustrating a structure for providing voice and high-speed data services through an embedded IAD implementation in an xDSL service system according to an embodiment of the present invention.

3 is a diagram showing a detailed configuration of the built-in IAD in FIG.

Explanation of symbols on the main parts of the drawings

20: built-in IAD 21: serial matching

22: subscriber test matching unit 23: ring generating unit

24: PSTN subscriber matching unit 25: ATM matching unit

26: xDSL subscriber matching unit 27: DSP matching unit

28: main processor matching unit 29: time switch matching unit

30: power matching unit 40: DSLAM

50: VoDSL Gateway

Features of the present invention for achieving the above object is a built-in IAD that is commonly installed in the premises where the DSLAM is located to provide VoDSL matching function to the subscriber terminal to provide voice and high-speed data service; Voice including VoDSL gateway that provides voice service matching function by matching with PSTN / ISDN network to subscribers connected through the embedded IAD and DSLAM, or by providing voice and high speed data service matching function by matching with IP or ATM network. And a data matching system.

In this case, the embedded IAD is connected to an ATM access network and VoDSL gateway to provide a broadband voice and data service to a subscriber by connecting to a PSTN / ISDN network using a packet-based ATM switching technology, or by connecting to an IP or ATM network. It features.

The embedded IAD includes a PSTN subscriber matching unit that performs a POTS telephone matching function for accommodating voice subscribers; A ring generator for generating and supplying a ring signal for a call to a POTS telephone in cooperation with the PSTN subscriber matching unit; A time switch matching unit for providing a convergence function and a PCM subhighway matching function for voice connected to the PSTN subscriber matching unit, and a clock and frame synchronization signal to another matching unit in the embedded IAD; A DSP matching unit for performing DTMF transmission and reception, various tone checking, network echo cancellation, and voice codec functions; A main processor matching unit performing redundancy and memory matching control functions, which are internal / external control functions of the entire embedded IAD, and subscriber signaling and protocol processing functions; An xDSL subscriber matching unit performing an xDSL subscriber matching function in the subscriber premises for high speed data service subscriber accommodation; The voice and data processed by the embedded IAD is configured as an ATM cell through IMA matching, and includes an ATM matching unit for interworking with an ATM access network and a VoDSL gateway via a DSLAM installed in the premises.

In another aspect, the present invention provides a method for performing convergence processing by connecting a received voice signal to a time switch matching unit when a voice signal is received from a subscriber station connected to a PSTN subscriber matching unit; After the converged voice signal is composed of ATM cells through IMA matching, it connects to PSTN / ISDN network through DSLAM and VoDSL gateway to provide circuit switched voice service, or connects to IP or ATM network for packet switched voice service. It is to provide a voice and data matching method comprising a providing process.

Still another aspect of the present invention provides a method for transmitting an ATM matching unit comprising: transmitting received data to an ATM matching unit when high speed data is received from a subscriber station connected to an xDSL subscriber matching unit; The present invention provides a voice and data matching method including providing a packet-type high-speed data service by configuring a received cell into an ATM cell through IMA matching and then connecting to an IP or ATM network through a DSLAM and VoDSL gateway.

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

In the voice and data matching system according to the present invention, the VoADL matching function is provided to provide xDSL voice and high-speed data service by installing the IAD in the premises rather than the subscriber's premises, but does not install an additional 5-class switch. It connects to the VoDSL gateway on the side and connects to PSTN / ISDN network using packet (ATM / IP) based ATM switching technology, or provides broadband voice and data integration service to subscribers by connecting to IP or ATM network. As an example, the configuration of the xDSL service system according to the present invention is as shown in the accompanying drawings, Figure 2, the various subscriber terminals are installed in the subscriber premises, the built-in IAD (20) and DSLAM that is the xDSL subscriber receiving device installed in the premises 40 and a VoDSL gateway 50 on the carrier side.

That is, in the xDSL service system according to an embodiment of the present invention, the VoDSL gateway 50 provides voice and high-speed data service to the subscriber terminal through the DSLAM 40 and the built-in IAD 20 in the premises, and to the network side. It provides a voice service matching function by matching with a PSTN / ISDN network, or by providing a voice and high speed data service matching function by matching with an IP or ATM network. The DSLAM 40 and the VoDSL gateway 50 are the same as in the related art. However, the built-in IAD 20 has a structure that is installed in the premises where the DSLAM 40 is installed, not the subscriber premises.

Here, the embedded IAD 20 is connected to the DSLAM 40 to provide VoDSL matching function to provide voice and high-speed data services through the VoDSL gateway 50, which is a core network.

In more detail, in the embodiment of the present invention, the built-in IAD 20, which is an xDSL subscriber receiving device for VoDSL matching, which provides voice and data matching, is shown in FIG. Matching unit 21, subscriber test matching unit 22, ring generation unit 23, PSTN subscriber matching unit 24, ATM matching unit 25, xDSL subscriber matching unit 26 ), A DSP (Digital Signal Processing) matching unit 27, a main processor matching unit 28, a time switch matching unit 29, and a power matching unit 30.

The serial matching unit 21 is a 9-pin DIN type connector of RS-232C type that matches the management port to operate, maintain, and monitor the embedded IAD 20 using a line driver / receiver. The subscriber test matching unit 22 interworks with the PSTN subscriber matching unit 24 and the xDSL subscriber matching unit 26 through the subscriber test bus to make a line test and call for the POTS voice subscriber and the xDSL high-speed data subscriber. The test function for the voice and data subscriber lines by driving a relay (switch) under the control of the main processor matching unit 28 (Out Test) to check the electrical abnormality of the subscriber terminal line. In-test is conducted to test the network for abnormality.

The ring generation unit 23 generates a 20 Hz ring signal and supplies it to the subscriber side in order to transmit a call signal to the POTS phone in cooperation with the PSTN subscriber matching unit 24, and the corresponding PSTN subscriber matching unit 24 is voiced. Perform POTS phone matching function to accommodate subscribers.

The ATM matching unit 25 configures the voice and data processed by the embedded IAD 20 into ATM cells through IMA (inverse multiplexer for ATM) matching, through the external network through the DSLAM 40, which is a common access node in the premises. And xDSL subscriber matching unit 26 performs an xDSL subscriber matching function in the subscriber premises for high-speed data service subscriber acceptance.

The DSP matching unit 27 performs DTMF (Dual Tone Multi-Frequency) transmission and reception, various tone (FAX, modem, etc.) check, network echo cancellation and voice coding (PCM, ADPCM, etc.) It detects DTMF signals and various tones, cancels echoes on the line and network during calls, and performs voice codec functions for PCM and ADPCM.

The main processor matching unit 28 performs internal / external control (redundancy control, memory matching control, etc.), subscriber signaling processing, and protocol processing functions of the entire embedded IAD 20, and the corresponding time switch matching unit 29. Provides a concentration function and PCM subhighway matching function for voice band signals connected to the PSTN subscriber matching unit 24, and a clock and frame synchronization signal to other matching units in the embedded IAD 20. .

The power matching unit 30 supplies driving power to the built-in IAD 20, but receives a DC 18V to supply a driving power required for each matching unit, and a power reset for resetting the supply of the driving power. Contains wealth.

The procedure for providing voice and high-speed data services through VoDSL matching using the built-in IAD 20 in the xDSL service system, which is a voice and data matching system according to an embodiment of the present invention configured as described above, is as follows.

First, when a signal of a voice band (300 to 3400 hz) is received from a subscriber terminal such as a POTS telephone, a fax, or a modem connected to the PSTN subscriber matching unit 24 inside the built-in IAD 20 installed in the premises, the corresponding PSTN subscriber matching unit The voice signal received at 24 is connected to the time switch matching unit 29 under the control of the main processor matching unit 28, collected and processed, and then transferred to the ATM matching unit 25.

Then, the ATM matching unit 25 configures the converged voice as an ATM cell through IMA matching and passes through the VoDSL gateway 50 via the DSLAM 40 installed in the premises through the PSTN / ISDN network, which is a 5 class switch. It provides a circuit switched voice service or provides a packet switched voice service through the VoDSL gateway 50 through an IP or ATM network.

Next, when ultra-fast data such as ADSL / SDSL / VDSL is received from a subscriber terminal such as a PC connected to the xDSL subscriber matching unit 26 inside the built-in IAD 20 installed in the premises, the corresponding xDSL subscriber matching unit 26 is received. The received data is transferred to the ATM matching unit 25 under the control of the main processor matching unit 28.

Accordingly, the ATM matching unit 25 configures high-speed data into ATM cells through IMA matching, and passes the VoDSL gateway 50 via the DSLAM 40 commonly installed in the premises through an IP or ATM network to form an ultra-high speed packet. Provide data services.

As described above, the present invention provides a voice and high-speed data service through the VoDSL gateway 50, which is a core network, by installing a built-in IAD 20 that performs voice and data matching functions in the premises where the DSLAM 40 is located. Thus, operators can accommodate xDSL series high-speed data service subscribers without changing the loop of PSTN / ISDN network through existing DSLAM and ATM switches, and provide subscribers with voice service as well as high-speed data service. By providing it, it is possible to reduce the cost during voice calls.

In addition, the embodiments according to the present invention are not limited to the above-described embodiments, and various voice and data matching systems may be modified and changed within the scope obvious to those skilled in the art. have.

As described above, according to the present invention, a system that performs a voice and data matching function is commonly installed in the premises rather than the subscriber's premises, so that a service provider can reduce the burden of wiring at the home and easily provide a voice service for each existing high-speed data subscriber unit. In addition, subscribers can save money by purchasing a matching system.

In addition, the present invention by implementing a built-in voice and data matching system commonly installed in the DSLAM and the premises, the service provider can accommodate a new voice subscriber through the ATM network without the installation of a five-class switch, etc. for voice services, As the exchange function, billing, statistics and management functions can be integrated, it is easy to provide on-hook transmission such as remote meter reading, additional services such as CID (Call ID), three-way call, specific ring, call waiting, and incoming transmission. The service can be provided using the Windows-based browser in the interface environment.

Claims (5)

A built-in IAD which is commonly installed in the premises where the DSLAM is located and provides VoDSL matching function to subscriber terminals to provide voice and high-speed data services; It includes a VoDSL gateway that provides a voice service matching function by matching with a PSTN / ISDN network for subscribers connected through the embedded IAD and DSLAM, or by providing a voice and high-speed data service matching function by matching with an IP or ATM network. A voice and data matching system. The method of claim 1, The built-in IAD, in conjunction with an ATM access network and VoDSL gateway, connects to a PSTN / ISDN network using packet-based ATM switching technology, or provides broadband voice and data services to subscribers by connecting to an IP or ATM network. Voice and data matching system. The method according to claim 1 or 2, The built-in IAD includes a PSTN subscriber matching unit that performs a POTS telephone matching function for accommodating voice subscribers; A ring generator for generating and supplying a ring signal for a call to a POTS telephone in cooperation with the PSTN subscriber matching unit; A time switch matching unit for providing a converging function and a PCM subhighway matching function for voice connected to the PSTN subscriber matching unit, and a clock and frame synchronization signal to another matching unit in the embedded IAD; A DSP matching unit for performing DTMF transmission and reception, various tone checking, network echo cancellation, and voice codec functions; A main processor matching unit performing redundancy and memory matching control functions, which are internal / external control functions of the entire embedded IAD, and subscriber signaling and protocol processing functions; An xDSL subscriber matching unit performing an xDSL subscriber matching function in the subscriber premises for high speed data service subscriber accommodation; Voice and data matching system, comprising an ATM matching unit for configuring voice and data processed by the embedded IAD into ATM cells through IMA matching and interworking with an ATM access network and VoDSL gateway via a common DSLAM in the premises . When the voice signal is received from the subscriber station connected to the PSTN subscriber matching unit, connecting the received voice signal to the time switch matching unit to perform a convergence process; After the converged voice signal is composed of ATM cells through IMA matching, it connects to PSTN / ISDN network through DSLAM and VoDSL gateway to provide circuit switched voice service, or connects to IP or ATM network for packet switched voice service. Speech and data matching method comprising the step of providing. transmitting the received data to the ATM matching unit when the high speed data is received from the subscriber station connected to the xDSL subscriber matching unit; A method of voice and data matching, comprising the steps of providing a packet-type high-speed data service by configuring received data into an ATM cell through IMA matching and then connecting to an IP or ATM network through a DSLAM and VoDSL gateway.