KR100283623B1 - Trunk Matching and Channel Switching Device and Its Method in Citi to Data Service Interworking System - Google Patents

Abstract

The present invention is to occupy the trunk of the E1 CEPT trunk line which is a communication path between the CT-2 switch and the CT-2 data service interworking device connected to the base station in the development of the CT-2 data service interlocking device for providing a stable data service in the CT-2 system; An object of the present invention is to provide a trunk matching and channel switching device and method in a CT-2 data service interworking system capable of performing channel assignment and channel switching functions.

According to the present invention, a framer for performing a signal synchronization function between the companion devices; Switching means for outputting a signal input from the framer, forming a path between stations E1 according to the input control signal, and switching service data through an assigned timeslot and outputting a modem control related information signal; The control signal for receiving the data from the switching means to form a control signal for forming a path between stations according to the input data, and outputs to the switching means, the control signal for separating the data and the modem control signal to assign a path; Trunk and switching control means for outputting to the switching means; Buffering means for temporarily storing and outputting a signal input from said switching means; And a synchronizing signal generating means for providing a synchronizing clock to the switching means and the buffering means.

Description

Trunk Matching and Channel Switching Device and Its Method in Citi to Data Service Interworking System

The present invention is to occupy the trunk of the E1 CEPT trunk line which is a communication path between the CT-2 switch and the CT-2 data service interworking device connected to the base station in the development of the CT-2 data service interlocking device for providing a stable data service in CT-2 system; An apparatus and method for trunk matching and channel switching in a CT-2 data service interworking system capable of performing channel assignment and channel switching functions.

In order to provide data service in the mobile communication system currently in service, TDMA method provides low speed data service of 9.6Kbps by processing speed matching and coded demodulation function that can process data packet in base station controller and mobile terminal. have.

In addition, the CT-2 data service method defined in the CT-2 standard ETSI standard is similar to the TDMA method in order to provide a synchronous and asynchronous communication service in a terminal and a base station, such as a rate adapter and a forward error controller. Function modules such as Forward Error Control, Link Access Protocol Radio, and Packet Assemble / Disassemble should be provided.

However, since the base station and the terminal provided in the country do not have a module for providing a data service, CT-2 to provide a high quality data service at a minimum cost to the subscribers and operators, because of the economic burden There is a need for providing a service using a shared modem built in a data service interworking device.

The present invention has been made to solve the problems of the prior art as described above, CT-2 exchanger and CT connected to the base station in the CT-2 data service interworking device for providing a stable data service in the CT-2 system -2 E1 CEPT trunk trunk occupancy, channel allocation and channel switching functions, which are communication paths between data service interworking devices, separate data and modem control signals from the exchange, and receive data through the assigned channel. A trunk matching and channel switching device and method in a CT-2 data service interworking system for transmitting a modem control signal and transmitting a modem control signal to a data packet processing device through an internal signaling bus so as to process a modem control function. The purpose is to provide.

1 is a block diagram of an E1 trunk matching and channel switching device of a CT-2 data service interworking apparatus according to an embodiment of the present invention;

2 is a flowchart of an E1 trunk matching and channel switching method of a CT-2 data service interworking apparatus according to an embodiment of the present invention.

♠ Explanation of symbols on the main parts of the drawing ♠

101: framer 102: switching module

103: trunk and switching control module

According to the present invention for achieving the object as described above, a framer for receiving the input data from the exchange to convert to a digital signal and extract the synchronization clock to perform a signal synchronization function between the interlocking device; Switching means for outputting a signal input from the framer, forming a path between stations E1 according to the input control signal, and switching service data through an assigned timeslot and outputting a modem control related information signal; The control signal for receiving the data from the switching means to form a control signal for forming a path between stations according to the input data, and outputs to the switching means, the control signal for separating the data and the modem control signal to assign a path; Trunk and switching control means for outputting to the switching means; Buffering means for temporarily storing and outputting a signal input from said switching means; And a synchronizing signal generating means for providing a synchronizing clock to the switching means and the buffering means.

In addition, according to the present invention, in the trunk matching and channel switching method applied to the trunk matching and channel switching device in the CT-2 data service interworking system, receiving a relay line occupancy request signal, occupies the relay line and assigns a time slot A first step of making; A second step of requesting data service through an internal signal bus by transmitting a connection response message after receiving a request signal for bidirectional communication connection using a modem through a set timeslot; A third step of providing a two-way data or internet service when a modem operation is requested to switch modem data to a called subscriber; And a fourth step of receiving the request signal for service termination or stop, releasing the assigned modem, releasing the channel set as the relay line matching device, and requesting the channel release to the exchange. Trunk matching and channel switching methods are provided.

In the following, with reference to the accompanying drawings, a preferred embodiment of the trunk matching and channel switching device and method in the CT-2 data service interworking system according to the present invention will be described in detail.

Interworking CT-2 data service with modem pool function so that general users can receive stable high speed data service through existing CT-2 base station by using application program installed in personal computer or information terminal without modem By developing a device and sharing and using a modem, convenience and economy can be provided.

The present invention detects, extracts and removes a predetermined preamble from a digital signal received through a trunk line trunk from a CT-2 switch in a CT-2 data service interworking device for providing such a service, and processes an encoding / decoding process and a digital packet. It handles the function of sending to the general switching network or CT-2 terminal in the form. It must also provide configuration management for signal protocol processing and operational maintenance via the system bus with external peripherals.

In the present invention, a device for providing E1 CEPT trunk matching and channel switching function in a CT-2 data service interworking device for providing a data service for CT-2, data from a base station in conjunction with a CT-2 switch or a general PSTN switch. It handles speed matching and channel switching.

1 is a block diagram of an E1 trunk matching and channel switching device of a CT-2 data service interworking device according to an embodiment of the present invention.

As shown in the figure, the E1 trunk matching and channel switching device of the CT-2 data service interworking apparatus according to an embodiment of the present invention, the framer 101, switching module 102, trunk and switching control module 103 ), A buffer 104 and a synchronization signal generating module 105.

Now, the operation of the E1 trunk matching and channel switching device of the CT-2 data service interworking apparatus according to an embodiment of the present invention will be described in detail.

First, the framer 101 matches the exchanger with the E1 CEPT, receives the E1 trunk input data received from the exchange, converts it into a digital signal, extracts a synchronous clock, and performs a signal synchronization function between the exchanger and the CT-2 data service interworking device. do.

The switching module 102 outputs a signal input from the framer 101 to the trunk and the switching control module 103, and forms a path between the E1 stations according to the control signal input from the trunk and the switching control module 103. And the modem control signal is separated, and the service data is switched through the assigned time slot, and the modem control related signal information is transmitted through the internal buffer of the CT-2 data service interworking device via the buffer 104 and the data packet processing device and the modem control signal. Replace it.

The buffer 102 performs a function of buffering and outputting a signal input from the switching module 103.

The synchronization signal generation module 105 supplies a clock to the switching module 102 and the buffer 104.

The trunk matching device, data packet processor, and CT-2 data service interworking device exchange information such as maintenance, resource setting, and traffic information with the VME matching module, the internal bus matching device.

2 is a flowchart of an E1 trunk matching and channel switching method of a CT-2 data service interworking apparatus according to an embodiment of the present invention.

As shown in the figure, the E1 trunk matching and channel switching method of the CT-2 data service interworking apparatus according to an embodiment of the present invention, first, requesting the data service, facsimile service or Internet service to the CT-2 exchange If the call setup request is requested, a relay line occupation (SEIZE) request is made to the E1 trunk matching and channel switching processor of the CT-2 data service interworking device (201). In this case, the CT-2 data service interworking device occupies the relay line with the switch and allocates a specific time slot of 64 Kbps (202).

When the exchange requests a bidirectional communication connection using a modem through the established timeslot (203), the trunk matching device sends a connection response message (204) and requests a data service to the data packet processor via the internal signal bus (205).

Subsequently, when the data packet processor performs modem operation and requests the modem data to be switched to the called subscriber (206), the channel switching module switches the calling terminal data to a set type slot to provide bidirectional data or Internet service. (207).

Next, when the calling subscriber requests to terminate or stop the service (208), the data packet processor releases the assigned modem, releases the channel set as the relay line matching device, and requests the channel to release the switch (209).

In order to perform the above procedure, the CT-2 data service interworking device performs the relay line occupancy and channel setting and release stop of the CT-2 exchange period, and then transitions to a state in which the next service can be provided.

As described in detail above, the trunk matching and channel switching device and method in the CT-2 data service interworking system of the present invention are occupied by E1 CEPT relay line through ABCD line signaling between the CT-2 switch and the CT-2 data service interworking device. The function of channel assignment and traffic data switching, and the function of passing the data received through the modem to the called party's subscriber station, and the modem negotiation signal and traffic data received from the power station, can be tested. In addition, there is an effect that it is possible to secure the reliability of the CT-2 data service interworking device by providing a maintenance function for modem control and system stability of the device and the data packet processor.

In the above description, the technical idea of the trunk matching and channel switching apparatus and method thereof in the CT-2 data service interworking system of the present invention has been described with the accompanying drawings. This is illustrative of the best embodiments of the present invention. It is not intended to limit. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (2)

A framer for receiving input data from the exchange, converting the signal into a digital signal, extracting a synchronous clock, and performing a signal synchronization function between interlocking devices; Switching means for outputting a signal input from the framer, forming a path between stations E1 according to the input control signal, and switching service data through an assigned timeslot and outputting a modem control related information signal; The control signal for receiving the data from the switching means to form a control signal for forming a path between stations according to the input data, and outputs to the switching means, the control signal for separating the data and the modem control signal to assign a path; Trunk and switching control means for outputting to the switching means; Buffering means for temporarily storing and outputting a signal input from said switching means; And Trunk matching and channel switching device in a CT-2 data service interworking system comprising a synchronization signal generating means for providing a synchronization clock to the switching means and the buffering means. A trunk matching and channel switching method applied to a trunk matching and channel switching device in a CT-2 data service interworking system, Receiving a relay line occupancy request signal, occupying the relay line and allocating timeslots; A second step of requesting data service through an internal signal bus by transmitting a connection response message after receiving a request signal for bidirectional communication connection using a modem through a set timeslot; A third step of providing a two-way data or internet service when a modem operation is requested to switch modem data to a called subscriber; And A trunk in the CT-2 data service interworking system comprising a fourth step of receiving a request signal for service termination or stop, releasing an assigned modem, releasing a channel set as a relay line matching device, and requesting a channel release to an exchange. Matching and channel switching method.