Optical communication card and optical transmission device

• US 8,626,001 B2
• Filed: 09/23/2011
• Issued: 01/07/2014
• Est. Priority Date: 10/22/2010
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kamakura, Masafumi, Takatori, Koji, Fukashiro, Yasuyuki, Uda, Tetsuya, Narita, Hidemasa
• Primary Examiner(s): Bello, Agustin
• Application Number:
  US13/243,982
• Publication Number:
  US 20120099871A1
• Time in Patent Office: 837 Days
• Field of Search: 398158-161, 398/208
• US Class Current: 398/208
• CPC Class Codes: H04B 10/40 Transceivers
• CPC Class Codes: H04B 10/516 Details of coding or modulation

Abstract

There arises a problem that power consumption increases along with an increasing throughout of an FEC function effective in speeding up of a transmission speed. FEC function information necessary for a system is prepared, and multiple FEC functions are properly used according to a selected transmission line, etc.

Claims

1. An optical transmission device comprising:

multiple optical communication cards;

a control card configured to control the optical communication cards; and

a switch card connected to the multiple optical communication cards, wherein

each of the optical communication cards comprises;

a signal transmission/reception unit configured to perform optical-electrical signal conversion for a signal received from outside;

a first FEC processing unit configured to perform FEC processing for a signal from the signal transmission/reception unit;

a first function selection unit configured to select a type of the FEC processing and to control the first FEC processing unit; and

a first control unit configured to transmit/receive a signal to/from the control card,

the switch card comprises;

a second FEC processing unit configured to perform FEC processing for a signal from one of the optical communication cards; and

a second control unit configured to select a type of the FEC processing and to control the second FEC processing unit and configured to transmit/receive a signal to/from the control card, and

the control card comprises;

a data table that associates a transmission line with multiple different types of FEC functions applicable to the transmission line and that stores them; and

a retrieval processing unit configured to retrieve information to be transmitted to at least one of the first control unit and the second control unit from the data table.

2. The optical transmission device according to claim 1, wherein:

the first FEC processing unit is configured to store multiple different types of FEC functions; and

the first function selection unit is configured to select one of the multiple different types of FEC functions.

3. The optical transmission device according to claim 1, wherein:

the retrieval processing unit is configured to retrieve an FEC function corresponding to the transmission line and transmission speed corresponding to path setting information received from outside; and

the first control unit is configured to control the first selection unit based on a retrieval result of the FEC function by the retrieval processing unit received from the control card.

4. The optical transmission device according to claim 3, wherein the control card is configured to transmit first mounting information received from the one of the optical communication cards to outside, and to receive the path setting information determined based on the first mounting information from outside.

5. The optical transmission device according to claim 3, wherein the control card is configured to transmit second mounting information received from the switch card to outside, and to receive the path setting information determined based on the second mounting information from outside.