JPS6248149A - On-line test method for line switching data - Google Patents

Abstract

PURPOSE:To prevent the delay in finding out a line fault by checking whether or not a parity error takes place in a data with an odd number parity sent from a line terminal interface section while keeping on-line state and informing the result of check to a central station equipment. CONSTITUTION:A data sent from a node TA4 is divided into 6-bit by a data transmission exchange section DATAs13, added by one bit of 6-bit check odd number parity bit by a parity bit composition section Pas12 and added by one bit of RS signal bit from the node TA4 to be formed into a data format and the result is sent to a line control section LCU8. When the opposite data reaches from the line control section LCU8, the 6-bit is received by a data reception DATAR16, the data in 6-bit is subject to parity check by a parity check section Pa R15 and the Rs bit sent from the opposite side is sent to the node TA4 as a CD signal by CD control section CD R17. In this case, the decision information of the party check of data is informed to the central station equipment via a line terminal control section CTL 10 to find out earlier the fault of line.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a line-switched data online testing method, particularly a central station II that monitors and controls the entire optical ring communication network, and a terminal line connected to this optical communication network. The present invention relates to a circuit-switched data online testing method in a circuit-switched circular communication network in which a plurality of terminal devices for monitoring and control are distributed.

[Conventional technology]

Conventionally, in this type of communication network, once the line control channel set up under control from the central office equipment goes online, data is sent and received via the line terminal interface section of the central office equipment and the terminal equipment. ,
In line switching, data received at the terminal line speed is divided into 8 bits of high-speed data (6 bits = data, 2 bits = R8/CD, RL) at the line terminal interface and sent out to the other line terminal interface. One bit of the control signal was used as a CD signal, and the other bit was used for return offline testing.

[Problem that the invention seeks to solve]

The above-mentioned circuit switching in the conventional communication network has the drawback that line data in an online state cannot be monitored, so there is a delay in detecting line failures, and most of the discoveries are reported by terminal users.

[Failure to solve the problem]

According to the present invention, the present invention comprises a central station device that monitors and controls the entire optical communication network, and a plurality of distributed terminal devices that monitor and control the accommodation terminal lines connected to this optical communication network,
The central office equipment controls the channel setting to the time division switch of the terminal equipment necessary for circuit switching, and central monitoring and control means for the terminal line interface part that the terminal equipment monitors and controls. It is equipped with a time division switch means that can set a channel for each accommodated terminal line by station equipment control, and a line terminal interface unit for each accommodated terminal line, and data with terminal line speed received from a certain terminal is sent to the line terminal interface unit as a control signal 2. The received data from the terminal is converted into a total of 8 bits of high-speed data (6 bits) and optical communication is carried out to the terminal equipment where the destination terminal is accommodated via the channel in the time division switch allocated by line switching. In a system in which the data is transmitted over the network and reaches the line terminal ink interface section of the other side via a channel in the time division switch of the other side, when the line terminal interface section divides data from outside the terminal into 6 bits and sends it out. Using 1 bit of control signal, 6-bit check odd parity bit is added and sent, and the line terminal interface section checks the sent data with odd parity to determine whether a parity error has occurred and switch the line. A line-switched data online testing method is obtained, which is characterized in that data is checked online and the check result is notified to a central office device.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 illustrates an embodiment of the present invention, which includes a central station device that monitors and controls the entire optical ring communication network, and a plurality of end station devices that are connected to this optical communication network and monitor and control accommodated terminal lines. The block diagram of the entire distributed arrangement is shown. In the figure, 1 is the central office equipment (C8), 2゜2' is the distributed terminal equipment (TDS), and ' is the central office equipment 1 and the terminal equipment 2. .2' is connected by the optical ring transmission line 3 and is connected to the terminal station device (TDS) 2.
Terminal A (TA) 4 is connected to terminal A (TA) 4, and terminal B (TB) 4' is connected to terminal equipment (TB 8) 2/.

Figure 2 is a detailed configuration diagram of the terminal equipment (TB8) 2.2'.
The terminal station equipment (TDS) 2, 2' includes an optical control section (OPT) 5, a drop insert circuit section (D/I) 6, a time division switch (TDSW) 7, a line control section (LCU) 8. It consists of a line terminal interface section (LtJT) 9. For example, low-speed data sent from a terminal (TA) 4 is processed at the line terminal interface section (LUT) 9 into a total of 8 bits, consisting of 2 bits of control signal and 6 bits of data received from the terminal. The data is converted to high-speed data (1,544 Mbps) and sent via the line control unit (LCU) 8 to the central office equipment (C8) via line switching.
) 1, the time division switch (TDS)
W) 7 to the terminal station where the destination terminal is accommodated, the data input/output section (D/I) 6 reaches the optical control section (OPT) 5, and the optical control section (OFT)
5, the electrical signal is converted into an optical signal and transmitted through an optical communication path. In the terminal equipment [2/ in which the destination terminal (TB) 4' is accommodated, when data is received by the optical control unit (OPT) s, the optical signal is converted into an electrical signal, and the data is sent to the data input/output unit CD/ I) 8-bit high-speed data (1,544M) is transferred to a CD through the line control unit (LCU) s through the channel in the time division switch (TDSW) 7 and at the line terminal interface unit (LUT) 9. Signal and Parit
y (high IJ) signal and 6 bits of data, and the 6 bits of data are converted into terminal speed data and sent to terminal B (Tn) 4 after checking.

FIG. 3 shows a detailed configuration diagram of an example of the line terminal interface unit (LUT) 9, in which the data transmitted from the (TA) 4 is divided into 6 bits by the data transmission exchange unit (DATAs) 13, and the parity pit is divided into 6 bits. The assembler (Pas) 12 adds 6 bits, 1 bit of odd parity bit, and 1 bit of the S signal bit from (TA) 4, resulting in a data format as shown in 18 in Figure 4. and is sent to the line control unit (LCU) s.

When data from the other party arrives from the line control unit (LCU) s, the data receiving unit (DATAR) 16 receives 6 bits, and the parity check unit (Pa-R) 15 checks the parity of the 6 bits of data. The RS bit received from the other party is sent to ('i'A) 4 as a CD signal by the CD control unit (CD-几) 17.

At this time, judgment information for the data parity check is notified to the central office equipment via the line terminal control unit (C'rL) 10, allowing early detection of line abnormalities. Also, regarding the ordinary L bit that has been used up until now, the central office equipment can be connected to the roof' control unit (
(L) This is done by software instructions to 11.

〔Effect of the invention〕

As described above, the present invention has the advantage that by using parity pits as control bits during data transfer, circuit exchange data can be checked while online, and the status can be quickly notified to the real device.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an example of the present invention, FIG. 2 is a detailed configuration diagram of an example of the terminal equipment, FIG. 3 is a detailed configuration diagram of the line terminal interface section of FIG. 1, and FIG. 4 shows a configuration diagram of an example of a transmission code. l...Central office equipment (C8), z, 2'...
...Terminal equipment k (TDS), 3... Optical ring transmission line, 4... Group terminal ('1'A), 4'... Terminal (TB), 5... ...Light control section (Op'r), 6.
...Drop insert circuit section (L)/1), 7
...Time division switch (TDSW), 8...
...Line control unit (LClJ), 9...Line terminal interface unit (LtJT), 1o...Line terminal control unit (CTL), 11...Loop control unit ( RL), 12...° Parity pit assembly section (
Pas), 13...Data transmission converter (DAT
As), 14...R8 sending section (几S・s), 1
5...Parity check unit (Pa-u),
16... Data receiving section, 17... CD
Control unit (CI) 4), 18... Cheetah format. Agent Patent Attorney Uchihara Oto r〜゛1゛ku1,−
′ Liang / Tago Figure 2 q′

Claims (1)

[Claims] It consists of a central station device that monitors and controls the entire optical ring communication network, and a plurality of distributed end station devices that monitor and control the accommodation terminal circuits connected to this optical communication network.The central station device is necessary for circuit switching. Channel setting control for the time-division switch of the terminal equipment and centralized monitoring and control means for the terminal line interface part that is monitored and controlled by the terminal equipment, and the terminal equipment is controlled by the central office equipment for each accommodated terminal line. A time division switch means that can set a channel and a line terminal interface unit are provided for each accommodated terminal line, and data with the terminal line speed received from a certain terminal is processed by the line terminal interface unit as a control signal of 2 bits and data received from the terminal 6. The data is converted into high-speed data with a total of 8 bits, and is transmitted via an optical communication path to the end station equipment where the destination terminal is accommodated via a channel in the time division switch allocated by circuit switching. In a system that reaches a line terminal interface unit on the other side via a channel in a division switch, when the line terminal interface unit divides data from a terminal into 6 bits and sends them out, it uses 1 bit of a control signal to divide the data into 6 bits. Send with check odd parity bit The other party's line terminal interface checks the sent zeta with odd parity, determines whether a parity error has occurred, and checks the line switching data while online. A circuit-switched data online testing method characterized by notifying the check result to a central office device.