JPH0744484A - Optical channel device - Google Patents

Abstract

PURPOSE:To improve the reliability by adding channel number information to each frame of transfer data on an optical interface and using one optical interface with plural channels in common so as to utilize the performance of the optical interface. CONSTITUTION:A local channel 2 (remote channel 3) has channel basic sections 22-25 (31-34) controlling data transfer, optical interface module sections 280-282 (310-312) converting an electric signal into an optical signal, an optical module selection section 26(36) adding channel number information to transfer data and selecting an optical interface module, a channel basic section selection section 27(35) selecting a channel basic section based on added channel number information and an optical fault report section 29(38) informing a fault of the optical interface module, and the local channel 2 has a request control signal 21 making transmission reception of data by arbitrating a request, and the remote channel 3 has input output control sections 370-373 making data transfer control with the input output device 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical channel device for controlling an optical interface in an input / output data transfer system.

[0002]

2. Description of the Related Art In FIG. 2 of Japanese Patent Laid-Open No. 1-140257, a channel 2C connected to a CPU 1, an optical channel device connected to this channel 2C, and an optical interface connected to this optical channel device 3 are shown. A cable 4, and a remote channel device 5 connected to this optical interface cable 4 are shown. Such a system has one optical interface for one channel.

[0003]

Depending on the system configuration, the transfer capacity of the optical interface may have an excessive capacity as compared with the actual transfer rate, and there is a drawback that the performance of the optical interface cannot be fully utilized.

Further, when a module related to the optical interface fails, the failed channel bus becomes unusable, which causes a problem in the operation of the system.

[0005]

The device of the present invention is an optical channel device having a local channel connected to an input / output processing device and a remote channel connected to the local channel, wherein the local channel And the remote channel, an optical interface module unit for mutually converting electrical parallel data and optical serial data for transmitting and receiving optical serial data between the local channel and the remote channel.
A channel basic unit for controlling data transfer and temporarily storing the transferred data, and an optical interface which refers to the optical module selection information from the input / output processing device by adding a channel number to the frame data from the channel basic unit An optical module selection unit that determines whether frame data is transmitted via the module unit, and determines whether the optical interface module unit transmits frame data with a channel number to one of the channel basic units based on the channel number. And a channel base selection unit.

[0006]

An embodiment of the present invention will now be described in detail with reference to the drawings.

Referring to FIG. 1, an optical channel device according to an embodiment of the present invention includes an input / output processing device 1 and an input / output device 4.
It is placed between and. One embodiment of the present invention comprises a local channel 2 and a remote channel 3, both of which are connected by a plurality of optical interfaces 51, 52 and 53.

The local channel 2 converts electrical parallel byte data into optical serial data and sends it to the optical interfaces 51-53, and at the same time, converts the optical serial data received from the optical interfaces 51-53 into electrical parallel byte data. The optical interface module units 280, 281 and 282 to be converted and the frame number-added frame data received from the optical interface units 51-53 via the optical interface module units 280, 281, and 282 are converted into the channel numbers added to the frame data. On the basis of the above, a channel basic unit selecting unit 27 for deciding to which channel basic unit 22-25 the frame data is transmitted is provided. In addition to this, the local channel 2 has a transfer control unit for controlling data transfer of each optical channel device and a data buffer for temporarily storing transfer data, and a channel basic unit (for each port of the optical channel) ( Port # 0) 22, (Port # 1) 23, (Port # 2) 24 and (Port #
3) 25, optical module selection information from the optical module selection changing unit 11 of the input / output processing device 1 by adding information consisting of channel numbers to the frame data sent from these channel basic units 22-25 to the optical interfaces 51-53 Refer to which optical interface module part 2
Data transfer requests from the optical module selection unit 26, which determines whether to send frame data via 80-282, and the channel basic unit 22-25 of each port, and data transfer with the input / output processing device 1 Request control unit 21 and each interface module unit 280-2
Optical failure reporting unit 2 that reports the failure of 82 to the input / output processing device 1
Including 9.

The remote channel 3 includes a plurality of optical interface module sections 310-312, which are the same elements as the constituent elements of the local channel 2, and a channel basic selection section 3.
5, optical module selection unit 36, channel basic unit (port # 0) 31, (port # 1) 32, (port # 2) 33
And (port # 3) 34 and optical failure reporting unit 38. The remote channel 3 also has port-corresponding input / output control units 370-373 which control data transfer with the input / output devices 41-44. Since this embodiment has four ports of optical channels, each of the local channel 2 and the remote channel 3 has four basic channel portions. The number of optical interface module units is arbitrary and may be larger than the number of ports of the optical channel.

The input / output processing device 1 includes an optical module selection changing unit 11 for changing the setting of the optical module selection information in the optical module selecting units 26 and 36 based on the failure report detected by the optical failure reporting units 29 and 38. Have.

Next, the detailed configuration of the optical module selection units 26 and 36 used in one embodiment of the present invention will be described in detail with reference to FIG.

Referring to FIGS. 1 and 2, the optical module selectors 26 and 36 receive the data from the respective channel bases 22-25 or 31-34 through which optical interface module 280-282 or 310-312. The optical module selection information register 265, which stores the information for determining whether to be transferred by the optical module selection changing unit 11 of the input / output processing device 1;
Channel number assigning circuit 26 for assigning respective channel numbers to the frame data from 25 or 31-34
0, request unit 2 of this channel number assigning circuit 260
An arbitration circuit 266 that arbitrates an optical interface module section use request from 64 with selection information from the optical module selection information register 265 and generates selection information. A frame selector 267 for selecting frame data with number CHN is provided.

The channel number assigning circuit 260 in the optical module selecting units 26, 36 is an input register 261 for temporarily holding the data from the channel basic unit 22-25 or 31-34, and frame data to which channel numbers are assigned. Output register 263 that temporarily holds the value, cyclic redundancy check CR with channel number assignment
It includes a check code recreating circuit 262 that recreates a check code such as C, and a request unit 264 that issues a request to use the optical interface module unit 280-282 or 310-312.

Referring to FIG. 3, the channel base 27,
35 is an optical interface module section 280-28.
2 or 310-312, an input register 270 that temporarily holds the data, and each channel basic part (port) 22-25 or 31 based on the channel number CHN given to the frame data from this input raster 270.
Channel base selector 2 for determining data to −34
71, the check code recreating circuit 274 for recreating a check code such as CRC from the data in which the channel number CHN is excluded from the data selected by the channel basic unit selector 271, and the channel basic unit selector 271 An output register 273 that temporarily holds the frame data including a header (Header) and data (Data) and the check code from the check code recreating circuit 274 is included.

Next, the operation of the embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1, 2 and 3, this embodiment is a 4-channel optical channel device, and there are 3 paths of optical interfaces. The input / output processing device 1 uses the optical module selection information for determining which optical channel device (channel basic unit) uses which interface module unit based on the transfer rate of each optical channel device. The optical module selection information register 265 in the selection unit (26, 36) is initialized. In this embodiment, the channel ports # 0 and # 1 (channel basic unit 2
2 and 31, 23 and 32) use optical interface # 0 (optical interface module units 280 and 310), and channel port # 2 (channel basic units 24 and 33).
Uses optical interface # 1 (optical interface module units 281 and 311), and uses channel port # 3
(Channel bases 25 and 34) are optical interfaces #
2 (optical interface module parts 182 and 312)
Set to use. The data (transfer data and communication command) frame transferred between the local channel 2 and the remote channel 3 is transferred via a predetermined optical interface module unit based on the optical module selection information. In the data frame received from the optical interface module unit, the optical module selection unit (2
Since the channel number information is added by (6, 36), it is possible to judge which channel the frame belongs to. The channel basic section selecting section (27, 35) transfers the data frame received from the optical interface module section to a predetermined channel basic section based on the channel number information. In this way, by adding channel number information to the data frame transferred by the optical interface, it is possible for a plurality of optical channels to share the optical interface and the optical interface unit. Therefore, it is possible to effectively use the performance of the optical interface by sharing the optical interface and to reduce the number of the optical interfaces.

When the optical failure reporting unit (291, 381) detects a failure in the optical interface and the optical interface module units (280-282), (310-312), it reports the failure information to the input / output processing unit 1. The optical module selection changing unit 11 in the input / output processing device 1 uses the optical module selection information register 26 in the optical module selection unit (26, 36) so as not to use the failed optical interface and the optical interface module unit.
Change the contents of 5. In the present embodiment, it is assumed that the optical interface # 2 (optical interface module unit 182
And 312), a failure report is issued by the optical failure reporting unit (29, 38).
Be transmitted to. In the input / output processing device 1, in consideration of load information such as the transfer rates of the healthy optical interfaces # 0 and # 1, the optical module selection change unit 11 is used to register in the optical module selection unit (26, 36). The optical module selection information of 265 is changed. In this embodiment, it is assumed that the optical module selection information is changed so that the transfer of the optical interface # 2 is switched to the optical interface # 1. As a result, the transfer performed between the channel basic units 25 and 34 performed in the optical interface # 2 is switched to the optical interface # 1 (optical interface module units 281 and 311), and the optical interface Also, even if a failure occurs in the optical interface module section, the function is replaced by another interface, so that extremely high reliability can be achieved.

[0018]

According to the present invention, since the data frame from a channel device (channel basic part) can be identified by the channel number information added to the frame, it is possible to identify the optical frame used by each channel device. The interface module unit can be freely set, for example, duplicated. Therefore, the performance of the optical interface can be fully utilized by allowing the optical interface having sufficient performance to perform data transfer of a plurality of channels. In addition, when a failure occurs in the optical interface module, the failed optical interface is not used, and the optical module selection information is reconfigured so as to substitute data transfer to another optical interface. A high optical interface system can be built.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a detailed configuration of optical module selection units 26 and 36 in FIG.

FIG. 3 is a diagram showing the basic channel selection units 27 and 35 in FIG.
It is a figure which shows the detailed structure of.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input / output processing device 11 Optical module selection change part 2 Local channel 21 Request control part 22-25 Channel basic part 26 Optical module selection part 27 Channel basic part selection part 280-282 Optical interface module part 29 Optical failure report part 3 Remote channel 310-312 optical interface module part 35 channel basic part selection part 36 optical module selection part 31-34 channel basic part 370-373 input / output control part 38 optical failure reporting part 4 input / output device 41-44 input / output device

Claims (3)

[Claims] 1. An optical channel device comprising a local channel connected to an input / output processing device and a remote channel connected to the local channel, wherein the local channel and the remote channel are the local channel and An optical interface module unit for mutually converting electrical parallel data and optical serial data for transmitting and receiving optical serial data between the remote channels, and controlling data transfer and temporarily storing transfer data. A channel basic unit and a channel number is added to the frame data from the channel basic unit, and the frame data is transmitted through any of the optical interface module units with reference to the optical module selection information from the input / output processing device. An optical module selection unit for determining whether Optical channel device which comprises a channel base portion selecting unit that determines and sends to one of the channel basic unit on the basis of the channel number of the channel numbered frame data from the interface module unit. 2. The local channel and the remote channel are provided with an optical failure report portion for notifying the input / output processing device of a failure of the optical interface module section, and the input / output processing apparatus is provided with an optical failure report section. 2. The optical channel device according to claim 1, further comprising: an optical module selection changing unit that changes the optical module selection information given to the optical module selection unit in response to the notification. 3. The local channel includes a request control unit that arbitrates data transfer requests from a plurality of channel basic units and transfers data to and from the input / output processing device. Optical channel equipment.