JPH1188367A - Communication method between devices - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a contact or the like of a maintenance work and so on between devices without using a special line by setting each ID in an ATM signal processing device, using an empty cell in an ATM main signal as a contact cell, storing an ID of a communicator or a communicated party in the contact cell and transmitting this together with data. SOLUTION: A contact cell detection part A have a header separate a main signal (a) to be inputted into signal (c) for indicating a position of contact communication cell and a main signal (b) and outputs them. A data detection part B inputs the main signal (b) and a position signal (c) and transmits contact communication reception data (e) and a main signal (d). An empty cell detection part C inputs the main signal (d) and transmits an empty cell detection signal (g) and a main signal (f). A data insertion part D inputs the main signal (f), the empty cell detection signal (g) and contact communication transmission data (q) and outputs a main signal (h) that multiplexes the contact communication transmission data. A contact cell detection part E inputs a main signal (I), has the header separate it into a signal (k) for indicating a position of the contact communication cell and a main signal (j) and outputs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-device communication system, and more particularly to an asynchronous transfer mode (Asynchronous transfer mode).
In a transmission line network in which a plurality of ATM signal processing devices based on s Transfer Mode (hereinafter, abbreviated as ATM) are connected, unused cells (empty cells) in a main signal unique to the ATM are used for communication between arbitrary devices. The present invention relates to an inter-device communication method in an ATM signal processing device that performs communication communication between devices using a part of a cell.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 07-050675 discloses a conventional technique of this kind. What is disclosed in this publication is an in-device monitoring circuit in an asynchronous transfer mode communication device, which adds a parity bit after inserting a random signal into an empty cell by using an empty cell in the device, and adds a parity bit to the next circuit. The parity check is performed in the units, and the connection state between the units is detected by the parity check.

[0003]

However, the prior art described in the above publication has the following problems. That is, the prior art described in the publication monitors the connection state between units by using the conduction / non-conduction of predetermined empty cells. For this reason, only specific connection monitoring within a specific device can be performed, and connection monitoring of the entire transmission path network and communication between arbitrary devices cannot be performed. Further, when the transmission line network is added or restored after the construction is completed, it cannot be confirmed whether or not the transmission line network is normally connected.

Accordingly, an object of the present invention is to provide an ATM signal processing apparatus, which uses unused cells (hereinafter referred to as empty cells) in a main signal to communicate between opposing apparatuses or between arbitrary apparatuses in a transmission line network. It is an object of the present invention to provide an inter-device communication system capable of smoothly performing communication for maintenance work and communication between devices without using a special line.

[0005]

In order to solve the above-mentioned problems, an inter-device communication system according to the present invention has the following characteristic configuration. (1) In a communication system between devices in a transmission line network in which a plurality of ATM signal processing devices are connected, an individual ID is set for each ATM signal processing device, and an empty cell in the ATM main signal is used as a communication cell. By storing the ID of the device of the communication source and the ID of the device of the communication destination in this contact cell and transmitting them together with the data, communication between arbitrary devices is enabled.

(2) In the inter-device communication method according to (1), an empty cell in the main signal is detected, and the ID of the communication source device and the ID of the communication destination device are written in the detected empty cell. Signal transmission.

(3) In the inter-device communication method according to (1), the ATM signal processing device includes at least a contact cell detecting unit, an empty cell detecting unit, and a communication data transmitting unit, and It is configured such that data for communication communication can be written / read to an empty cell in the main signal.

(4) In the inter-device communication system according to the above (1), each of the ATM signal processing devices receives an input main signal a
A contact cell detector that separates and outputs a signal c indicating the position of the contact communication cell and a main signal b by a header, and the main signal b and the position signal c, and receives the contact communication reception data e and A data detector for transmitting the main signal d, an empty cell detector for receiving the main signal d and transmitting an empty cell detection signal g and a main signal f, and communicating with the main signal f and the empty cell detection signal g Insertion unit for inputting transmission data q for use and outputting a main signal h obtained by multiplexing transmission data for contact communication in an empty cell, and a signal k for inputting a main signal i and indicating the position of the cell for communication using a header A communication cell detection unit that separates and outputs the main signal j and the main signal j; a data detection unit that receives the main signal j and the position signal k and transmits the communication communication reception data m and the main signal l; The signal l is input, and the empty cell detection signal o and the main signal n, an empty cell detecting unit for transmitting n, the main signal n, the empty cell detection signal o, and the communication communication transmission data r, and outputting a main signal p obtained by multiplexing the communication communication transmission data to the empty cell. An insertion unit, a first selector unit for inputting the communication communication signal s from outside and transmitting the communication communication data q and r, and inputting the communication communication reception data e and m and receiving the communication communication reception to the outside; A second selector for outputting the signal t.

(5) In the inter-device communication method according to (1), in the contact cell, the ID of the source device is written at the head of the data part, and the ID of the destination device is next. Is entered, and thereafter, data for communication is stored.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 is a block diagram showing a configuration of an inter-device communication system according to a first embodiment of the present invention. ATM
, An ATM signal processor 1 for processing a main signal by a cell includes a contact cell detector A, a data detector B, an empty cell detector C, a data inserter D, and a contact cell detector E.
, A data detecting unit F, an empty cell detecting unit G, a data inserting unit H, a selector 1 unit K, and a selector 2 unit J.

The contact cell detecting section A separates the input main signal a into a signal c indicating the position of the contact communication cell and a main signal b by a header and outputs the separated signals. The data detection unit B receives the main signal b and the position signal c and receives the communication communication reception data e.
And the main signal d. The empty cell detector C receives the main signal d and transmits an empty cell detection signal g and a main signal f. The data insertion unit D receives the main signal f, the empty cell detection signal g, and the communication data for transmission q, and outputs a main signal h obtained by multiplexing the communication data for communication with the empty cell.
The contact cell detector E receives the main signal i, separates it into a signal k indicating the position of the contact communication cell and a main signal j by a header, and outputs them. The data detection unit F receives the main signal j and the position signal k and receives the communication communication reception data m and the main signal l.
Send The empty cell detector G receives the main signal 1 and transmits an empty cell detection signal o and a main signal n. The data insertion unit H inputs the main signal n, the empty cell detection signal o, and the communication data for communication communication r, and outputs a main signal p obtained by multiplexing the communication data for communication with the empty cell. Selector l part K
Receives the communication communication signal s from outside and transmits the communication communication data q, r. The selector 2 receives the communication communication reception data e and m and outputs a communication communication reception signal t to the outside.

FIG. 2 shows an example of a transmission line network constituted by the ATM signal processing device 1 described above. This transmission path network receives main signals 101 and 203, and outputs main signals 102 and 204.
Signal processing device 11 for outputting the main signal 102
And an ATM signal processing device 21 for inputting the main signals 103 and 203 and an ATM signal processing device 31 for inputting the main signals 103 and 201 and outputting the main signals 104 and 202. Have been.

A device ID is set in each of the ATM signal processing devices 11 to 31. Now, a case where communication is performed between the ATM signal processing devices 11 and 31 will be described as an example. In the following description, for example, the part 31-B is
It indicates that the ATM signal processing device is 31 and the operation block in the device is B in FIG.

First, in the ATM signal processing device 11,
An idle cell, which is an unused cell in the main signal, is detected by the 11-C unit inside the main signal, and the communication signal input from the 11-s is multiplexed to the empty cell selected by the 11-D, so that communication is performed. Transmit as a cell. ATM signal processor 2
In No. 1, since the identification ID in the contact cell is different, the contact cell is passed as it is. The ATM signal processing device 31 detects the contact cell by means of the 31-A section inside the ATM signal processing device 31, and after confirming that the identification IDs match, the ATM cell processing device 31-B
Detected by the unit and transmitted to the outside as a received signal by the 31-J unit. Also, the contact cell detected in the section 31-B is:
After detecting the communication signal, it is transmitted to the subsequent stage as a normal empty cell. The signals 301, 303, 305 correspond to the communication signal s in FIG. 1, and the signals 302, 304, 306 correspond to those in FIG.
Of the communication communication reception signal t.

FIG. 3 shows the format of the contact cell. A
The cell format of the TM signal has a 53-byte configuration. The first 5 bytes are a header part for cell identification, and the latter 48 bytes are a data part (payload). At the top of this data section, the I
D is entered, followed by the ID of the device of the communication destination, followed by data for communication communication.

[0016]

As described above, according to the present invention,
It is possible to provide an inter-device communication system having the following effects. That is, conventionally, ATM devices did not have means for performing communication between devices, and thus could not connect to a transmission line network or perform communication between arbitrary devices.
According to the present invention, it is possible to perform communication between arbitrary devices by using an empty cell. In particular, in the system of the present invention, since communication between the devices can be accurately performed without having a special line in the ATM signal processing device, communication during maintenance work between the devices can be easily performed. it can. Therefore, it is possible to smoothly construct a transmission path network.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram illustrating a configuration of an inter-device communication system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a basic configuration example of a transmission line network using an inter-device communication system according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an example of a contact cell format of an inter-device communication system according to the first embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 ATM signal processing device A contact cell detecting section B data detecting section C empty cell detecting section D data inserting section E contact cell detecting section F data detecting section G empty cell detecting section H data inserting section K selector 1 section J selector 2 section 11 ~ 31 each ATM signal processing device

Claims (5)

[Claims] In an inter-device communication system for performing communication between devices in a transmission line network to which a plurality of ATM signal processing devices are connected, an individual ID is set for each ATM signal processing device.
An empty cell in the ATM main signal is used as a contact cell, and the ID of the communication source device and the ID of the communication destination device are stored in the contact cell and transmitted together with data, thereby enabling communication between arbitrary devices. A communication method between apparatuses, characterized in that: 2. The inter-device communication system according to claim 1, wherein an empty cell in the main signal is detected, and an ID of a communication source device and an ID of a communication destination device are written in the detected empty cell to transmit a signal. 3. An ATM signal processing apparatus comprising at least a contact cell detecting unit, an empty cell detecting unit, and a communication data transmitting unit, and transmits the communication communication data to an empty cell in the main signal in the transmission path. 2. The inter-device communication system according to claim 1, wherein the system is configured to be capable of writing / reading. 4. An ATM cell processing unit, comprising: a contact cell detector for separating an input main signal a into a signal c indicating a position of a communication cell and a main signal b by a header and outputting the separated signal; b and a position signal c, a data detector for transmitting the communication communication reception data e and the main signal d, and an empty cell for receiving the main signal d and transmitting an empty cell detection signal g and a main signal f. A data insertion unit that receives the main signal f, the empty cell detection signal g, and the communication communication transmission data q, and outputs a main signal h obtained by multiplexing the communication communication transmission data into the empty cell; i, a contact cell detector for separating and outputting a signal k indicating the position of the contact communication cell and a main signal j by a header, and the main signal j and the position signal k, Data detection for transmitting received data m and main signal l If, enter the main signal l, the empty cell detector for transmitting a main signal n and idle cell detection signal o,
A data insertion unit for inputting the main signal n, the empty cell detection signal o, and the communication communication transmission data r, and outputting a main signal p obtained by multiplexing the communication communication transmission data into the empty cell; And a second selector for inputting the communication communication data q and r and for inputting the communication communication reception data e and m and outputting a communication communication reception signal t to the outside. The inter-device communication system according to claim 1, comprising: 5. In the contact cell, the ID of the source device is entered at the head of the data portion, the ID of the destination device is entered next, and the contact communication data is stored thereafter. 2. The communication method between apparatuses according to claim 1, which has a special format.