KR100464499B1 - Apparatus for data communication channel in optical transmission equipment - Google Patents

Abstract

The present invention provides a data communication channel device of an optical transmission device, comprising: a switch buffer connected to an optical unit to switch between a relay section and a multiplexing section; By including an HDLC controller that performs HDLC processing of the input signal switched in the switch buffer, the operator can freely select and accept a channel out of the method of using a fixed relay section.

Description

Apparatus for data communication channel in optical transmission equipment

The present invention relates to a data communication channel (DCC) device of an optical transmission device, and more particularly to an optical transmission device that is suitable for an operator to arbitrarily select and accept a channel, instead of using a fixed relay section. A data communication channel device is provided.

In general, SDH (Synchronous Digital Hierarchy) is a standard technology for synchronous data transmission on optical media, which is equivalent to the international Synchronous Optical Network (SONET). Both technologies are faster and less expensive to access networks than traditional PDH (Plesiochronous Digital Hierarchy) devices. SDH uses the following STM series and speeds: These include Synchronous Transport Module level 1 (STM-1) at 155 Mbps, STM-4 at 622 Mbps, STM-16 at 2.5 Gbps, and STM-64 at 10 Gbps.

1 is a conceptual diagram showing the structure of such a general SDH frame.

Data communication channel (DCC) is a channel used for network operation of SDH optical transmission equipment.

2 is a block diagram of a data communication channel device and an optical unit of a conventional optical transmission device.

Here, reference numerals 10 and 30 denote optical units on the west side and the east side, and 20 denotes a switching unit which performs data switching between the optical unit 10 on the west side and the optical unit 30 on the east side. to be.

Further, reference numeral 40 denotes a data communication unit (DCU) for forming a data communication channel between the optical units 10 and 30. In the DCU 40, reference numeral 41 is a high-level data link control (HDLC) controller, 42 is a central processing unit (CPU), and 43 is a dynamic random access memory (DRAM).

As described above, the DCC channel is accommodated in various ways according to the network configuration of the optical transmission equipment system.

And it is configured to receive and process DCC serial line from optical unit using HDLC series Link Access Procedure for D Channel (LAPD) controller for DCC processing.

In addition, only the relay section (RS section) among the relay section (RS section) and the multiplexing section (MS section) is fixedly used.

Referring to the operation of the prior art in more detail as follows.

First, in the ASIC (Applicable Specific Integrated Circuit) or commercial chip in the optical unit 10 receiving the optical signal, the demultiplexing process is performed according to the set signal level of the SDH frame. Signal state information and error information are extracted by extracting the overhead of the relay section (RS section) and the multiple section (MS section).

At this time, information about the DCC channel can also be obtained. These information are connected to the board in charge of data communication through the motherboard via the connector of the optical unit 10.

This line is connected to the HDLC controller 41. The HDLC controller 41 then performs processing by the HDLC series LAPD controller, records the packet in the DRAM 43 area through the CPU 42 and DMA (Direct Memory Access), and receives the packet from the system software. It will be processed as a higher layer.

In the reverse process, the data is generated by the system software, and is composed of LAPD packets at the data link layer and transmitted to the optical unit via the motherboard. It is then multiplexed back into the SDH frame and transmitted over the optical fiber.

However, such a conventional technology has a limitation that an operator cannot selectively use a relay section and a multiplexing section.

In addition, the relay section has a transmission rate of 8000 frames * (3 * 8 bits) = 192 Kbps per second, while the multiplexing section has a transmission rate of 8000 frames * (9 * 8 bits) = 576 Kbps per second. Because of the design by, only the relay section has been fixed, resulting in an inefficient problem in terms of transmission speed.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to use a data of optical transmission equipment that can be arbitrarily selected and accommodated by an operator out of the method of using only a relay section. The present invention provides a communication channel device.

In order to achieve the above object, a data communication channel device of an optical transmission device according to an embodiment of the present invention,

A switch buffer connected to the optical unit to switch the relay section and the multiplexing section; It is characterized in that it comprises an HDLC controller for performing the HDLC processing of the input signal switched in the switch buffer.

1 is a conceptual diagram showing the structure of a typical SDH frame,

2 is a block diagram of a data communication channel device and an optical unit of a conventional optical transmission device;

3 is a block diagram of a data communication channel device of an optical transmission device according to the present invention;

FIG. 4 is a block diagram of a data communication channel device and an optical unit of the optical transmission device of FIG. 3.

Explanation of symbols on the main parts of the drawings

10: optical unit (WEST) 20: switching unit

30: optical unit (EAST) 40: DCU

41: HDLC Controller 42: CPU

43: DRAM 50: DCU

51: switch buffer 52: FPGA

53: HDLC Controller 54: PCI-Q Bus Bridge

55: SDRAM 56: CPU

61: first multiplexer 62: second multiplexer

Hereinafter, an embodiment according to the present invention configured as described above, the technical spirit of the data communication channel device of the optical transmission equipment will be described in detail with reference to the drawings.

3 is a block diagram of a data communication channel device of an optical transmission device according to the present invention, Figure 4 is a block diagram of a data communication channel device and an optical unit of the optical transmission device of FIG.

As shown therein, the switch buffer 51 is connected to the optical unit 10 and 30 to perform switching between the relay section and the multiplexing section; And an HDLC controller 53 which is switched in the switch buffer 51 and performs HDLC processing of the input signal.

The data communication channel device of the optical transmission device, PCI-Q bus bridge 54 is connected to the HDLC controller 53 and the PCI bus to perform a bridge function; An SDRAM 55 connected to the PCI-Q bus bridge 54 and a local bus to store data; And a CPU 56 connected to the PCI-Q bus bridge 54 by a local bus to control data communication channels.

The data communication channel device of the optical transmission device is connected to the switch buffer 51, the field programmable gate array (FPGA) 52 for controlling the selection of the relay section (RS section) and multiplexing section (MS section) It is further configured to include.

The switch buffer 51 is a relay section of the relay section DCC signal WEST_RSDCC of the optical unit 10 on the west side and the optical unit 30 on the east side according to the selection signal SELECT1 of the FPGA 52. A first multiplexer 61 which receives a DCC signal EAST_RSDCC and multiplexes it and outputs the multiplexed signal to the HDLC controller 53; The multiplexing section DCC signal WEST_MSDCC of the optical unit 10 on the west side and the multiplexing section DCC signal EAST_MSDCC of the optical unit 30 on the east side are multiplexed according to the selection signal SELECT2 of the FPGA 52. And a second multiplexer 62 for outputting to the HDLC controller 53.

Here, reference numeral 50 is a DCU.

The operation of the data communication channel apparatus of the optical transmission device according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First of all, for optical transmission equipment, DCC processing is essential. After constructing a network through optical signals, nothing will be as effective for large-scale communication as DCC. Therefore, the present invention implements the DCC line of the relay section and the multiplexing section connected to the serial line in the conventional optical unit 10, 30 by using the switch buffer 51 as shown in FIG.

This switch buffer 51 allows the data line to be selected as desired.

In this case, a control signal for selection may be generated using the FPGA 542, and includes a register area that may be directly read or written by software.

The detailed operation of the present invention will be described in more detail with reference to FIG. 4 as follows.

First, signals of the relay section and the multiplexing section coming from the optical units 10 and 30 are connected to the switch buffer 51. The relay section and the multiplexing section can be identified by the overhead of the RS section and the MS section overhead in the SDH frame structure of FIG. 1.

After connecting to the switch buffer 51 as described above, a signal for controlling the switch buffer 51 is generated using the FPGA 52.

In particular, this is made possible by constructing a register map from which data communication system software which manages a Telecommunication Management Network (TMN) can select it.

The register map value of the FPGA 52 may be configured as shown in Table 1 below.

6 7 West side light unit East Side Light Unit 0 0 MS interval MS interval 0 One MS interval RS section One 0 RS section MS interval One One RS section RS section

When configured as shown in Table 1, the operator can set the section arbitrarily.

In this case, the signals selected in the relay section and the multiplexing section are connected to the HDLC controller 53.

In addition, since the HDLC controller 53 and the CPU 54 are connected through the PCI-Q bus bridge 54 instead of the local bus for DCC processing, the bus utilization efficiency may be improved.

As described above, the present invention is to allow the operator to arbitrarily select and accept a channel out of the method of using only the relay section.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the data communication channel device of the optical transmission device according to the present invention is designed so that an operator can select and use a relay section and a multiplexing section at a point when a TMN function for managing a system using a communication network is greatly highlighted. As a result, the DCC channel can be used more efficiently.

In addition, considering that the transmission speed of the conventional relay section is 192Kbps, the transmission speed of the multiplexing section is 576Kbps, so that the relay section and the multiplexing section can be selectively used to improve the transmission speed. do.

Claims (4)

A switch buffer connected to the optical unit to switch the relay section and the multiplexing section; An HDLC controller switched in the switch buffer to perform HDLC processing of the input signal; A PCI-Q bus bridge connected to the HDLC controller by a PCI bus and performing a bridge function; An SDRAM connected to the PCI-Q bus bridge and a local bus to store data; And a CPU connected to the PCI-Q bus bridge and a local bus to control a data communication channel. delete The data communication channel apparatus of claim 1, wherein And an FPGA connected to the switch buffer to control selection of a relay section (RS section) and a multiplexing section (MS section). The method of claim 3, wherein the switch buffer, A first multiplexer for receiving the multiplexing section DCC signal of the optical unit on the west side and the relay section DCC signal of the optical unit on the east side according to the FPGA selection signal and outputting the multiplexing unit to the HDLC controller; And a second multiplexer configured to receive and multiplex the multiplexed section DCC signal of the optical unit on the west side and the multiplexed section DCC signal of the optical unit on the east side according to the selection signal of the FPGA, and output the multiplexed section DCC signal to the HDLC controller. Data communication channel device of optical transmission equipment.