KR100425985B1 - Apparatus For D-Channel Packet Data Processing In Switching System - Google Patents

Abstract

The present invention relates to an apparatus for processing D-channel packet data transmitted through a V5.2 protocol. The D-channel packet data included in an ISDN message transmitted from an access network to a V5.2 protocol is processed separately from voice data and signaling data. The present invention relates to a dechannel packet data processing apparatus in a switching system to provide efficiency in dechannel data processing.

The present invention is configured to interface V5.2 signaling data, D-channel data, and D-channel packet data through different serial buses between a line board that matches an E1 link and a control board that controls call processing control. .

Therefore, it provides efficiency and speed in the transmission of the de-channel packet data, and provides efficiency in the packet processing of the de-channel by using an independent bus, thereby providing stability and efficiency in the operation of the system for the increased data transmission.

Description

Apparatus For D-Channel Packet Data Processing In Switching System

The present invention relates to an apparatus for processing D-channel packet data transmitted through a V5.2 protocol, and more particularly, to an ISDN message transmitted from an access network through a V5.2 protocol. The present invention relates to a dechannel packet data processing apparatus in a switching system for providing efficiency in dechannel data processing by processing the dechannel packet data separately from voice data and V5.2 signaling data.

In general, the V5.2 protocols provided by international standards (ESTI 300 324-1, ETSI 300 347-1, ITU-T G.964, ITU-T G.965) are analog telephones and public telephones, Recommendation ITU. -T G.960 and I.430 compliant Integrated Services Digital Network (BRA) Basic Rate Access (BRA) access, and ISDN Primary Rate Access (PRA) compliant with Recommendations ITU-T G.962 and I.431 And providing a service for an analog or digital leased line connection, as shown in FIG. 1, as an interface between an access network and a local exchange system via an PSTN protocol and a BCC protocol. Provide various services.

In the above, the PSTN protocol is responsible for the call processing function of passing the analog state information to the protocol entity of the local switching system through the V5.2 interface without the access network controlling the call progress, and the BCC protocol is accessed under the control of the local switching system. It is responsible for requesting the access network to establish and release a call connection in a unit of call between a specific user port of a network and a specific V5.2 interface time slot.

In the above-mentioned message, the PSTN protocol is used for call processing. The message (ESTABLISH) notifying off-hook to the local switching system in the access network and the off-transmission transmitted from the local switching system to the access network in response to the reception of the off-hook message. A response message (ESTABLISH ACK) for a hook, a message (SIGNAL) for notifying an on-hook to a local switching system from an access network, a message (DISCONNECT) for notifying a call termination to an access network from a local switching system, and an access network It is composed of a message (DISCONNECT COMPLETE) informing the local switching system of the completion of the call.

In addition, the message of the BCC protocol used for call processing includes a message (ALLOCATION) informing the access network of the local switching system in the local switching system, and a resource allocated to the local switching system in the access network according to the notification of the resource allocation. An ALLOCATION COMPLETE message indicating completion of occupancy, a DEALLOCATION message notifying release of resources allocated to the access network side in the local switching system, and a release message of the allocated channel to the local switching system side in the access network. It consists of a DEALLOCATION COMPLETE of the allocated resources to be transmitted.

A conventional apparatus for processing D-channel packet data among ISDN messages transmitted from an access network to a local switching system through a V5.2 protocol having a message as described above can be seen in FIG. Voice signal in the ISDN message, which is connected through the E1 link and transmits and receives the ISDN message with the access network, and is connected to the T-switch and the upper processor in the local switching system and received from the lineboard 10 as a serial stream. After extracting the W-channel signal data and the D-channel packet data, the control board transmits a T-switch to the packet processor by performing a Layer 2 Link Access Procedure on the D channel (LAPD) processing on the D-channel packet data. )

In the above, the line board 10 and the control board 20 are matched through the SA-BUS for transmitting and receiving the V5.2 data to maintain the interface of the data.

In addition, the line board 10 analyzes the ISDN message frame of the V5.2 protocol received through the E1 link matched with the access network, and separates the voice data, the de-channel signaling data and the de-channel packet data, respectively. The frame separation / compositing unit 11 for synthesizing the voice data transmitted to the access network, the de-channel signaling data, and the de-channel packet data, and the signal and the de-channel packet data of the de-channel separated from the high level data link (HDLC) Control Procedure) HDLC processing unit 12 formed in the format and the separated voice data and the D-channel signal and the D-channel packet data formed in the HDLC format is formalized into a serial stream (Serial Stream) and transmitted to the control board 20 side. The SA-BUS matching unit 13 receives a standardized serial stream applied from the control board 20.

In addition, the control board 20 analyzes the standardized serial stream applied from the line board 10 to extract the voice data and the D-channel signal and the D-channel packet data, and then extract the D-channel signal data related to the call processing control. For the SA-BUS matching unit 21 which applies to the upper processor side and the voice signal transmitted to the call connected subscriber and the de-channel packet data to the LAPD processing unit 22 side, and the voice signal transmitted to the call connected subscriber It is composed of a LAPD processing unit 22 which transmits to the subscriber through the T-switch connecting the subscriber link, performs LAPD processing on the D-channel packet data, and then transmits the packet through the T-switch.

The operation of processing ISDN D-channel packet data in a conventional switching system having the function as described above is as follows.

When the ISDN frame message of the V5.2 protocol is applied to the frame separation / synthesis unit 11 of the line board 10 from the access network through the E1 link, the frame separation / synthesis unit 11 receives the ISDN of the V5.2 protocol. The frame message is analyzed according to a set algorithm, and the voice data transmitted to the connected subscriber is separated from the de-channel signal for call processing control and the de-channel packet data for data transmission. 13) and to the HDLC processor 12 for the de-channel signal and the de-channel packet data.

At this time, the HDLC processing unit 12 processes the de-channel signal and the de-channel packet data in the HDLC format and then applies the SA-BUS matching unit 13 to the system clock (not shown). Accordingly, the channel data and the channel data formed in the HDLC format of the voice data are formatted into a serial stream and transmitted to the control board 20 through SA-BUS.

The SA-BUS matching unit 21 of the control board 20 that receives the formatted serial stream through the SA-BUS from the line board 10 analyzes the received serial stream and transmits voice data and texts transmitted to the connected subscribers. Alternatively, the D-channel packet data for transmitting data for other services and the D-channel signal for call processing control are extracted, and the D-channel signal for call processing control is transmitted to the upper processor side in the switching system to perform an operation for call processing. The voice data is transmitted to the subscriber linked through the T-switch.

In addition, the D-channel packet data for data service is processed by the LAPD protocol of Layer 2 through the LAPD processor 22 and transmitted to the packet processor through the T-switch.

On the contrary, the signal requesting voice data and data service transmitted from the subscriber connected through the T-switch to the access network proceeds in the reverse order of the above operation.

As described above, in the conventional switching system for processing ISDN messages transmitted through the V5.2 protocol, since the voice data, the de-channel signal, and the de-channel packet data are formed into one serial stream and transmitted through the serial bus, the de-channel packet is transmitted. If the amount of data is large or large, there is a problem that the normal service cannot be provided due to the limitation of the transmission characteristics of the serial bus and data loss or service delay occurs.

In addition, there is a problem that does not meet the trend of the communication service that requires the provision of rapid data services and large data transfer.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described general problems, and an object thereof is to interface V5.2 signaling data, de-channel data, and de-channel packet data between a line board matching with an access network and a control board matching with an upper processor. By independently implementing the serial interface, each data between the line board and the control board performs an independent interface so that stable communication can be performed without load for high-speed data communication and large data communication.

1 is a general configuration diagram showing V5.2 protocol interface matching between a local exchange system and an access network.

2 is a block diagram of a de-channel packet data processing apparatus in a conventional local exchange system.

3 is a block diagram of a de-channel packet data processing apparatus in a switching system according to the present invention;

4 is a flowchart illustrating a process of processing D-channel packet data in the present invention.

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

100: line board 200: control board

The present invention for achieving the object as described above, in the de-channel packet data processing apparatus in the switching system, V5.2 signaling data between the line board for matching the E1 link and the control board for controlling the call processing, And the channel data and the de-channel packet data are configured to interface through different serial buses.

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

As can be seen in Figure 3 the present invention is a line board 100 connected through the access network and the E1 link and the control board 200 to match the upper processor that controls the overall operation for call processing control in the exchange system It is connected via SA-BUS to interface V5.2 signaling data for call processing control, SC-BUS to interface data for D channel, and SP-BUS to interface D channel packet data.

The line board 100 analyzes the ISDN message of the V5.2 protocol, which is connected to the T-switch and the access network and is applied through the access network, separates the data of the D-channel and the voice data and transmits the data to the access network in the switching system. V5.2 signaling data and D-channel for call processing control in the frame separation / combining unit 110 for synthesizing the voice data and the D-channel data, and the de-channel data separated by the frame separation / compositing unit 110. After separating the data, the HDLC processing unit 120 for shaping the data of the D channel in HDLC format, and matching the SA-BUS and shaping the V5.2 signaling data for call processing control into a serial stream, Accordingly, the SA-BUS matching unit 130 interfaced to the control board 200 and the SC-BUS are matched to form the data of the D-channel separated by the HDLC processing unit 120. SC-BUS matching unit 140 interfaced to the control board 200 according to the system clock, and the D-channel packet data that is processed and applied as LAPD from the control board 200 by matching with the SP-BUS It is then composed of the SP-BUS matching unit 150 to interface to the packet processor through a link to the T-switch.

The voice data received from the access network extracted by the frame separation / compositing unit 110 is transmitted to the subscriber side connected to the call through the link of the T-switch matching with its own board.

In addition, the control board 200 receives the V5.2 signaling data for call processing control interfaced with the line board 100 by matching the SA-BUS, and interfaces information on performing control to the line board 100. The SA-BUS matching unit 210 and the SC-BUS are matched to receive the D-channel data interfaced by the line board 100, and the D-channel data to be transmitted to the access network is lineboard 100 side. SP interface interface to the line board 100 in order to transmit the SC-BUS matching unit 220 and the D-channel packet data processed by the control board 200 to the packet processor matched by the T-switch. A bus matching unit 230 and a LAPD processing unit 240 for performing LAPD processing on the D-channel packet data interfaced by the line board 100.

The operation of processing the ISDN message of the V5.2 protocol in the device having the configuration as described above is as follows.

As can be seen in Figure 4, when the ISDN message of the V5.2 protocol is applied to the frame separation / synthesis unit 110 of the line board 100 through the E1 link from the access network, the frame separation / synthesis unit 110 is The ISDN message of the received V5.2 protocol is analyzed according to the set algorithm, and the voice data transmitted to the connected subscriber is separated from the D-channel data, and then the voice data is synchronized with the system clock to match the line board 100. It transmits through the link of T-switch to corresponding subscriber side connected to call.

In addition, the data of the de-channel is divided into V5.2 signaling data and the de-channel data necessary for call processing control through the HDLC processor 120, and then the SA-BUS matching unit 130 for the V5.2 signaling data. The control board 200 is transmitted to the control board 200, and the data of the D channel is formatted in HDLC format and then transmitted to the control board 200 through the SC-BUS matching unit 140.

At this time, the SA-BUS matching unit 210 in the control board 200 transmits V5.2 signaling data for call processing control interfaced through the SA-BUS from the line board 100 to the upper processor side through the upper processor interface. The corresponding control is performed by the transmission, and the SC-BUS matching unit 220 applies the de-channel data interfaced through the SC-BUS from the line board 100 to the LAPD processing unit 240 to process the layer 2 LAPD. After the process, the data is separated into the de channel information and the de channel packet data.

The separated D-channel information is reported to the upper processor through the upper processor interface, and the de-channel packet data is interfaced to the line board 100 through the SP-BUS matching unit 230.

At this time, the SP-BUS matching unit 150 in the line board 100 transmits the D-channel packet data interfaced via the SP-BUS in the control board 200 to the packet processor side through a link in which the T-switch is switching. do.

In addition, the process of transmitting the ISDN message of the V5.2 protocol to the access network is performed in the reverse order of the transmission path and data processing as described above, according to the request of the subscriber connected to the call, so the description thereof is omitted.

As described above, the present invention provides an interface between a line board and a control board through independent interface buses for voice data, D-channel data, and V5.2 signaling data separated from ISDN messages transmitted through the V5.2 protocol. Provides efficiency and speed in the transmission of D-channel packet data by performing the operation, and provides efficiency in packet processing in the D-channel by using an independent bus, thereby providing stability and efficiency in the operation of the system with an increased volume of data. .

Claims (4)

In the de-channel packet data processing apparatus in a switching system, And connect the V5.2 signaling data, the D channel data, and the D channel packet data through different serial buses between the line board matching the E1 link and the control board controlling the call processing control. De-channel packet data processing device in a switching system. The method of claim 1, wherein the line board, It is connected to the T-switch and the access network, and analyzes the ISDN message of the V5.2 protocol applied through the access network to separate the de-channel data and the voice data, and the voice data and the de-channel data transmitted to the access network. A frame separating / synthesizing portion to synthesize; The V channel signaling data and the D channel data for call processing control are separated from the D channel data separated by the frame separation / compositing unit, and the separated D channel data is in HDLC format in a high level Data Link Control Procedure (HDLC) format. An HDLC processing unit for shaping; An SA-BUS matching unit matching with the SA-BUS, which is a serial bus that interfaces the V5.2 signaling data, and formatting the V5.2 signaling data into a serial stream and interfacing to the control board according to a system clock; An SC-BUS matching unit that matches the SC-BUS which is a serial bus that interfaces the D-channel data, and forms the separated D-channel data to interface with the control board according to a system clock; An SP-BUS matching unit for matching the SP-BUS which is a serial bus for interfacing the D-channel packet data and interfacing the D-channel packet data applied from the control board to a packet processor through a link connected to the T-switch. De-channel packet data processing apparatus in the switching system, characterized in that made. The method of claim 2, wherein the line board, De-channel packet data processing apparatus in the switching system, characterized in that for transmitting the voice data separated by the frame separating / combining unit to the subscriber connected via the T-switch link. The method of claim 1 or 2, wherein the control board, An SA-BUS matching unit for receiving V5.2 signaling data that is interfaced with the SA-BUS and interfacing from the lineboard, and for interfacing information on performing control to the lineboard; An SC-BUS matching unit for receiving the D-channel data interfaced with the SC-BUS and interfacing from the line board and interfacing the D-channel data to be transmitted to the access network to the line board; An SP-BUS matching unit for interfacing D-channel packet data to the line board side for transmission to a packet processor that matches the T-switch; And a LAPD processing unit for processing the access channel on the D channel (LAPD) interfaced from the lineboard side.