Title:
CHANNEL PROTECTION METHOD BETWEEN BOARDS IN WAVE DIVISION MULTIPLEX SYSTEM
Document Type and Number:
WIPO Patent Application WO/2005/064829
Kind Code:
A1
Abstract:
The invention discloses a channel protection method between boards in wave division multiplex system. In the transmitting terminal, signals from client are divided into two signal via coupler, then transmitting to two single boards respectively, the two signals transmitted from two boards transmit to receiving terminal through different path; in receiving terminal, two optical signal communicate between two boards after being transmitted to two single boards respectively, signal quality detected by optical signal quality detector was transmitted to the main single board from the standby single board. According to the judgement, the invert control unit in the main single board transmits order to the standby single board for switching laser in client, so one of the client laser implements of main single board and standby single board is on, and the other is off. The virtue is: it can be protected when single board or main chips on single board is invalid, even when main control board is invalid, invert can be protected either; and transmission of the invert condition and invert order directly between two boards is faster than it communicates with the main controller through maibox.
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| JPH1127184 | DATA TRANSMITTER |
Inventors:
CHEN HONG (CN)
HOU CHUNFAN (CN)
FU WEI (CN)
YAN JUN (CN)
HOU CHUNFAN (CN)
FU WEI (CN)
YAN JUN (CN)
Application Number:
PCT/CN2004/000332
Publication Date:
July 14, 2005
Filing Date:
April 09, 2004
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
CHEN HONG (CN)
HOU CHUNFAN (CN)
FU WEI (CN)
YAN JUN (CN)
CHEN HONG (CN)
HOU CHUNFAN (CN)
FU WEI (CN)
YAN JUN (CN)
International Classes:
H04B1/74; H04B10/08; H04J1/00; H04J14/02; H04L1/20; H04L1/22; (IPC1-7): H04J1/00
Foreign References:
| CN1321004A | 2001-11-07 | |||
| JPH07143105A | 1995-06-02 |
Other References:
See also references of EP 1612978A4
Attorney, Agent or Firm:
DEQI INTELLECTUAL PROPERTY LAW CORPORATION (No.1 Zhichun Road Haidian District, Beijing 3, CN)
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