JP3076284B2 - Optical interface transmission method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing system such as a multi-node configuration, in which a plurality of inter-node connecting devices connected to each node via an optical transmission line are connected in multiple stages using a node connecting port, and optical transmission is performed. The present invention relates to an optical interface transmission system adapted to a system for performing data transmission.

[0002]

2. Description of the Related Art Conventionally, when data transmission is performed by optical transmission, as shown in Japanese Patent Application Laid-Open No. 60-173939,
Prior to data transmission, a transmission link must be established.

To establish an optical transmission line, a plurality of nodes (arithmetic processing units) 0, 1, 2, as shown in FIG.
In the configuration of the multi-node system in which the communication node 3 is connected by a dedicated inter-node connection network via an intra-node connection device prepared at each node, first, a sink signal for establishing a transmission link is transmitted from the node side to the inter-node connection device. 9, the inter-node connection device 9 detects the sync signal, transits to the transmission link establishment operation, and outputs the sync signal to the node side.

[0004] On the node side, the response to the self-output sync signal is determined based on the sync signal transmitted by the inter-node connecting device 9, and the establishment of the optical transmission link is recognized. In this manner, both devices that constitute a node that transmits a sync signal in advance, and the inter-node connection device 9 whose transmission link establishment operation is started in accordance with an instruction from the master device, are set as slave devices. Synchronization in the optical transmission path between the devices is established, and data transfer becomes possible.

[0005]

However, in the method for establishing synchronization as described above, the inter-node connecting device located as the slave side is connected in multiple stages using the node connecting port of the inter-node connecting device, and the number of connected nodes is increased. When the transmission link is established, the relationship between the master and the slave is broken in the establishment of the transmission link, and the transmission link cannot be established between the inter-node connecting devices in the slave side, and the data transfer cannot be performed, and the number of nodes is increased. It is not suitable as a means.

An object of the present invention is to make it possible to establish a transmission link regardless of the positions of a master and a slave, so that a node-to-node connection device located as a slave can be connected by an optical interface. It is an object of the present invention to provide means for enabling data transfer and enabling multi-stage connection of an inter-node connecting device as a means for adding a node.

[0007]

An optical interface transmission system according to the present invention comprises first and second inter-node connection devices connected via an optical transmission line. And a plurality of nodes connected to each of the second node connecting devices via an optical transmission line by switching control, and prior to data transfer of the first node connecting device, In response to a preset trigger signal, the first node connection device sends a transmission link establishment signal (hereinafter, referred to as a sync signal) to the second node connection device, The second no
The inter-node connection device receives the transmitted sync signal, transmits its own sync signal, and transmits a response signal to the first node.
To the node-to-node connecting device to establish a transmission link of an optical transmission path between the first and second node-to-node connecting devices ,
Between the node-to-node connection device and the second node-to-node connection device;
A connection port for connecting the first and second nodes;
And the plurality of nodes are respectively connected by optical transmission lines.
Port - is characterized in that was collected and the same, the Bruno - each between de connecting device, the initialization unit for performing initialization of the apparatus, the transmission link establishment signal is connected to the initialization processing unit A sync signal generating unit for generating and sending the generated signal to a partner device;
An optical data transmitting unit for transmitting an electric signal from the sync signal generating unit as an optical signal; and an optical data receiving unit for receiving an optical signal from the partner device and converting the optical signal into an electric signal. It is characterized by.

Further, the optical interface transmission system of the present invention has first and second node connecting devices connected via an optical transmission line, and the first and second nodes are connected to each other. Each of the node-to-node connecting devices has a plurality of nodes connected via an optical transmission line by switching control, and a preset trigger is set prior to data transfer of the first node-to-node connecting device. -In response to the signal, the first node connecting device sends a sync signal to the second node connecting device, and holds a sending history of the sync signal; The inter-node connecting device receives the transmitted sync signal, and transmits its own sync signal to the first inter-node connecting device and holds the transmission history of the self-sync signal; Receiving the sync signal sent from the node-to-node connecting device and After the transmission of the signal, the transmission of the self-sync signal is stopped, and a response signal to the sync signal transmitted from the first inter-node connection device is transmitted again. The transmission link of the optical transmission line of the first and second node connecting devices is established from the transmission history of the sync signal and the own sync signal transmitted from the device.
Between the first node connecting device and the second node.
The connection port between the first and second connection devices is
Optical transmission is performed between the node connecting device and the plurality of nodes.
It is the same as the port connected by the transmission line ,
Each of the node-to-node connection devices includes an initialization processing unit for initializing the device itself, and a sync signal generation unit connected to the initialization processing unit for generating the transmission link establishment signal and transmitting the signal to the partner device. An optical data transmission unit for transmitting an electric signal from the sync signal generation unit as an optical signal; and a history connected to the sync signal generation unit and the initialization processing unit for holding a transmission history of the sync signal. It is characterized by comprising a holding unit and means for stopping the transmitted sync signal.

Furthermore, the light Intafe of the present invention - scan transmission system, triggering the set in advance - is characterized in that the signal is a power-on ON signal.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a block diagram showing a system configuration (a block diagram showing a system configuration between node connection devices) showing a first embodiment of an optical interface transmission system according to the present invention, and FIG. FIG. 2 is a system configuration diagram of a node connection according to the present invention (the same components as those in FIG. 1 are denoted by the same reference numerals).
Yes) Note that arrows in FIG. 1 indicate signal transmission / reception directions.

Referring to FIG. 2, an arithmetic processor having an inter-node connection mechanism for controlling an interface with another node is defined as one node, and each of the nodes 0, 1, 2, 3, 4, 5
(Here, a maximum of four nodes can be connected to one inter-node connection device), a plurality of nodes are connected by an optical transmission path via inter-node connection devices 11 and 21,
Transfer between nodes is performed as a multi-node system.

The inter-node connection devices 11 and 12 are connected to each other using ports to which the nodes are originally connected.
Up to nodes are configured.

Referring to FIG. 1, an inter-node connecting device 1
Reference numerals 1 and 21 denote initialization processing units 60 and 70 for performing initialization and operation management of the node-to-node connecting devices 11 and 21, sync signal generation units 61 and 71 for generating and transmitting a sync signal, and an electric signal. The signal is converted into an optical signal and the other node-to-node connection device 21
And optical data receiving sections 63 and 73 for receiving optical signals from the other node-to-node connecting devices 21 and 11 and converting the optical signals into electric signals. When the power is turned on, initialization processing in the node connection devices 11 and 21 is performed, and after the initialization processing is completed, a sink signal for establishing a transmission link is transmitted to the partner node connection devices 21 and 11. . Further, the other node-to-node connection device 21,
11 has a function of receiving the sync signal transmitted from the receiver 11 and transmitting specific data (all “1” data in this embodiment) from the own transmit sync signal and the transmit sync signal from the other party.

The operation of the optical interface transmission system of the present invention configured as shown in FIGS. 1 and 2 will be described in detail with reference to FIGS.

Referring to FIG. 1 and FIG. 2, the node connection ports of the node connection devices 11 and 21 are connected to face each other. First, the power supply of the node connection device 11 is turned on. The operation in this case will be described.

When the power supply of the inter-node connection device 11 is turned on, the initialization processing unit 60 initializes the power supply when the power is turned on. After the initialization is completed, the initialization processing unit 60 establishes a transmission link with the opposing node-to-node connection device 21.
The sync signal generation unit 61 issues a sync signal transmission start instruction 6a to the sync signal generation unit 61, and upon receiving the instruction, transmits the sync signal to the inter-node connection device 21 via the optical data transmission unit 62. The sync signal (A) is converted from an electric signal to an optical signal by the optical data transmitting section 62 and sent to the node connecting device 21.

Next, when the power supply of the inter-node connecting device 21 is turned on, the initialization processing unit 7 is operated similarly to the inter-node connecting device 11.
0, and after completion of the initialization, a sync signal transmission start instruction 7a is issued to the sync signal generation unit 71, and
And transmits the sync signal (B) to the indirect connection device 11 via the optical data transmission unit 72, and
1 transmits the sync signal (A) transmitted from the optical data receiving unit 7
Receive by 3. Similarly, the inter-node connecting device 11 receives the sync signal (B) transmitted from the inter-node connecting device 21 by the optical data receiving unit 63.

The optical data receiving unit 63 in the inter-node connecting device 11 which has received the sync signal (B) receives the sync signal (B).
Is converted into an electric symbol, and the initialization processing unit 60 is notified 6b of the reception of the sync signal (B). Initialization processing unit 6
0, if the own sync signal (A) is transmitted and the sync signal (B) is received from the inter-node connecting device 21,
A specific data pattern (all “1” data in this case) signal (C) specified in advance is transmitted to the optical data transmission unit 62 using the normal data transfer path 6c. The optical data transmitting unit 62 converts the transmitted data into an optical signal,
A specific data pattern signal (C) is transmitted to the inter-node connecting device 21.

The transmitted data pattern signal (C) is
After being received by the optical data receiving unit 73 in the inter-node connecting device 21 and converted into an electric signal, the initialization processing unit 70 is notified 7
d. As a result, the inter-node connecting device 21 successfully establishes a transmission path link with the inter-node connecting device 11,
It recognizes that the optical transmission line has been opened. The node-to-node connecting device 21 sends specific data to the node-to-node connecting device 11 on the condition that the self-transmitting sync signal (B) and the partner-transmitting sync signal (A) are transmitted and received, similarly to the node-to-node connecting device 11. A pattern (in this case, all "1" data) signal (D) is transmitted. The node indirect device 11 is an inter-node connection device 2
As in the case of No. 1, the specific data pattern signal (D) is received, the transmission link is successfully established, and it is recognized that the optical transmission path is opened.

Next, a second embodiment of the optical interface transmission system of the present invention will be described with reference to FIG. Note that arrows in FIG. 3 indicate signal transmission / reception directions.

In FIG. 3, an inter-node connection device 100,
Reference numeral 200 denotes initialization processing units 160 and 270 for performing initialization and operation management of the node-to-node connection devices 100 and 200, and sync signal generation units 161 and 2 for generating and transmitting sync signals.
71, an optical data transmitting unit 162 for converting an electric signal into an optical signal and sending it to the other node-to-node connecting device 200, 100;
272, optical data receiving units 163 and 273 for receiving optical signals from the other node-to-node connecting devices 200 and 100, and converting them into electric signals, and history holding units 164 and 274 for holding sync signal transmission history. , Self-transmitting sync signal stopping means, and after the initialization is completed,
100, a sync signal transmission history is held, and a sync signal transmission history is held.
0, the received sync signal is received, the self-transmitted sync signal is stopped on condition that the received signal is transmitted and the self-transmitted sync signal is transmitted.
It has a function of sending a sync signal to 0 and 100.

With the above function, even if the node-to-node connection devices 100 and 200 are located on the slave side, the transmission link can be established without discriminating which of the nodes belongs to the master side or the slave side. Node connection device 10
A multi-node is formed by multi-stage connections of 0 and 200.

The operation of the optical interface transmission system shown in FIG. 3 will be described below.

When the power supply of the inter-node connection device 100 is turned on, the initialization processing unit 160 initializes the power supply on the signal. After the initialization is completed, the initialization processing unit 160 issues a sync signal transmission start instruction 16a to the sync signal generation unit 16l to establish a transmission link with the inter-node connection device 200, and the sync signal generation unit 161 receiving the instruction. Is transmitted via the optical data transmission unit 162 and
0, the transmission of the sync signal (A) and the notification 1 that the sync signal (A) has been transmitted to the history holding unit 164.
6e. The sync signal (A) is converted from an electric signal to an optical signal by the optical data transmission unit 162 and sent to the partner device.

Next, when the power is applied to the inter-node connection device 200, the initialization is performed by the initialization processing unit 270 in the same manner as in the inter-node connection device 100, and after completion, the transmission of the sync signal to the sync signal generation unit 271 is started. An instruction 27a is performed. Like the sync signal generation unit 161, the sync signal generation unit 271 notifies the history holding unit 274 that the sync signal (B) has been transmitted 27e, and transmits the sync signal (B) to the inter-node connection device 100 by optical data transmission. The data is transmitted via the unit 272. Also, the optical data receiving unit 273 receives the sync signal (A) transmitted from the inter-node connection device 100. Similarly, the inter-node connecting device 100 receives the sync signal (B) transmitted from the inter-node connecting device 200 by the optical data receiving unit 163.

After receiving the sync signal (B), the optical data receiving unit 163 in the inter-node connecting device 100 converts the sync signal (B) into an electric signal, and then receives the sync signal (B) at the initialization processing unit 160. 16b, and the initialization processing unit 160 sends its own sync signal (A), and
When the sync signal (B) is received from the other node connection device 200, the sync signal (A) stop instruction 16c is issued to the sync signal generator 161 to stop the transmission of the sync signal (A). After the stop of the sync signal (A), the initialization processing unit 160 again issues a sync signal (A) transmission start instruction 16a to the sync signal generation unit 161 and sends the sync signal (A) transmission instruction 162 to the inter-node connection device 200 via the optical data transmission unit 162. The sync signal (E) is transmitted in response to the sync signal (B) transmitted from the inter-node connection device 200.

The transmitted sync signal (E) is received by the optical data receiving unit 273 in the node-to-node connection device 200, converted into an electric signal, and notified to the initialization processing unit 270.
d. At this time, the inter-node connection device 200 similarly has its own transmission sync signal (B) and the other party's transmission sync signal (A).
In some cases, a response process of the sync signal (A) to the inter-node connection device 100 is being performed on condition that the sync signal (B) is stopped. That is, since the self-transmitted sync signal (B) is uncertain, it is determined 27f by the history holding unit 274 that the sync signal (B) has been transmitted after the power is turned on. The inter-connection device 200 recognizes that the transmission link has been successfully established with the inter-node connection device 100 and the optical transmission line has been opened. The inter-node connecting device 100 also receives the sync signal (F) transmitted from the inter-node connecting device 200 in the same manner, and the history keeping unit 164 sends the sync signal (F) to the inter-node connecting device 200 after the initialization process. It determines 16f that the signal (A) has been transmitted, and recognizes that the transmission link has been successfully established and the optical transmission path has been opened.

As is apparent from the above description of the operation, the optical interface transmission system of the present invention employs the
1, 21 and 100, 200, a transmission link can be established, data transfer is performed, and multi-stage connection is possible.

[0030]

As described above, according to the present invention, the transmission link can be established even in the node-to-node connection device located at the slave side position in the transmission link establishment operation. Can be connected in multiple stages using the inter-node connection port.

Therefore, even when the number of nodes is equal to or larger than the number of node connection ports, the number of nodes can be easily increased.

[Brief description of the drawings]

FIG. 1 is a system block diagram showing a first embodiment of an optical interface transmission system according to the present invention.

FIG. 2 is a system configuration diagram of connection between nodes according to the optical interface transmission system of the present invention.

FIG. 3 is a system configuration block diagram showing a second embodiment of the optical interface transmission system of the present invention.

FIG. 4 is a system configuration diagram of a conventional connection between nodes.

[Explanation of symbols]

0, 1, 2, 3, 4, 5 nodes 11, 21, 100, 200 Inter-node connection device 60, 70, 160, 270 Initialization processing unit 61, 71, 161, 271 Sink signal generation unit 62, 72, 162 , 272 Optical data transmitting section 63, 73, 163, 273 Optical data receiving section 164, 274 History holding section (A), (B), (E), (F) Sync signal (C), (D) Data pattern (E), (F) Sync signal 6a, 7a, 16a, 27a Sync signal transmission start instruction 6b, 7b, 16b, 27b Sync signal reception notification 6c, 7c, 16c, 27c Normal data transfer path 6d, 7d, 16d, 27d Electric signal notification 6e, 7e, 16e, 27e Sync signal transmission notification 6f, 7f, 16f, 27f Sync signal transmission determination

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁷ Identification code FI H04B 10/26

Claims (5)

(57) [Claims] A first and second node connecting device connected via an optical transmission line, wherein said first and second nodes are connected to each other;
Each of the node-to-node connecting devices has a plurality of nodes connected via an optical transmission line by switching control, and a preset trigger is set prior to data transfer of the first node-to-node connecting device. The first node connecting device sends a transmission link establishment signal (hereinafter referred to as a sync signal) to the second node connecting device in response to the signal, The interconnecting device receives the transmitted sync signal and transmits its own sync signal to send a response signal to the first node.
To the node-to-node connecting device to establish a transmission link of an optical transmission path between the first and second node-to-node connecting devices ,
Between the node-to-node connection device and the second node-to-node connection device;
A connection port for connecting the first and second nodes;
And the plurality of nodes are respectively connected by optical transmission lines.
An optical interface transmission system characterized by being the same as a port. 2. An inter-node connection device, comprising: an initialization processing unit for initializing its own device; and a transmission link establishment signal connected to the initialization processing unit and generated and transmitted to a partner device. A sync signal generator, an optical data transmitter for transmitting an electrical signal from the sync signal generator as an optical signal, and an optical data receiver for receiving an optical signal from the partner device and converting the optical signal into an electrical signal. 2. The optical interface transmission method according to claim 1, further comprising: 3. An apparatus according to claim 1, further comprising a first and second node connecting device connected via an optical transmission line, wherein said first and second nodes are connected to each other.
Each of the node-to-node connecting devices has a plurality of nodes connected via an optical transmission line by switching control, and a preset trigger is set prior to data transfer of the first node-to-node connecting device. -In response to the signal, the first node connecting device sends a sync signal to the second node connecting device, and holds a sending history of the sync signal; The inter-node connecting device receives the transmitted sync signal, and transmits its own sync signal to the first inter-node connecting device and holds the transmission history of the self-sync signal; The transmission of the self-sync signal is stopped from the reception of the sync signal transmitted from the inter-node connection device and the transmission of the self-sync signal, and the transmission is again performed from the first inter-node connection device. Sends a response signal to the sync signal First Roh - from the delivery history of de between the sink signal and the own sync signal sent from the connected device, said first and second Roh - to establish a transmission link of an optical transmission path between de connecting device, wherein A first node connection device and the second node connection device;
The connection ports to the node-to-node connection device are
And a second internode connection device and the plurality of nodes.
An optical interface transmission system, wherein each port is the same as a port connected by an optical transmission line . 4. Each of the node-to-node connection devices includes an initialization processing unit for initializing the device, and a transmission link establishment signal which is connected to the initialization processing unit and is transmitted to a partner device. A sync signal generating section, an optical data transmitting section for transmitting an electric signal from the sync signal generating section as an optical signal, and a transmitting of the sync signal connected to the sync signal generating section and the initialization processing section. 4. The optical interface transmission system according to claim 3, further comprising: a history holding unit for holding a history; and means for stopping the transmitted sync signal. 5. The optical interface transmission system according to claim 1, wherein the preset trigger signal is a power-on signal.