Method and apparatus for multi-protocol and multi-rate optical channel performance monitoring

• US 7,099,582 B2
• Filed: 05/31/2002
• Issued: 08/29/2006
• Est. Priority Date: 05/31/2002
• Status: Active Grant

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Levy, David S., Belhadj-Yahya, Chedley
• Primary Examiner(s): Payne, David C.
• Application Number:
  US10/160,596
• Publication Number:
  US 20030223746A1
• Time in Patent Office: 1,551 Days
• Field of Search: 359/128, 714/751, 714/47, 714/55, 714/57, 714/131, 398/27, 398/25, 398/154, 398/155, 370/333
• US Class Current: 398/27
• CPC Class Codes: H04B 10/07953 Monitoring or measuring OSNR, BER or Q
• CPC Class Codes: H04J 14/02 Wavelength-division multiplex systems

Abstract

A method and apparatus for optical performance monitoring that provides for multi-rate and multi-protocol monitoring includes, identifying a protocol associated with each of a plurality of communication signals using respective data rates extracted therefrom, determining, for each of the plurality of communication signals, a respective bit-error rate (BER), and generating an alarm indicative of BER excursions beyond a protocol appropriate BER threshold level.

Claims

1. A method, comprising:

identifying a protocol associated with each of a plurality of communication signals by comparing respective data rates extracted therefrom to a stored data rate within a protocol table;

determining, for each of the plurality of communication signals, a respective bit-error rate (BER);

generating an alarm indicative of BER excursions beyond a protocol appropriate BER threshold level associated with the identified protocol;

sampling each of the plurality of communication signals;

converting the plurality of communication signals to respective electrical signals;

amplifying each of the plurality of converted communication signals;

locking to the plurality of communication signals to extract thereby respective clock rates; and

converting serial high-speed data of the plurality of communication signals into lower speed parallel data prior to said identifying.

2. The method of claim 1, wherein said protocol table further defines said protocol appropriate BER threshold level.

3. The method of claim 1, wherein said alarm is adapted to alert at least one of a user and a service provider of a communication signal error.

4. The method of claim 1, wherein said alarm is adapted for use as a control signal to initiate corrective action in response to a communication signal error.

5. Apparatus for multi-protocol and multi-rate optical signal performance monitoring, comprising:

a plurality of multi-protocol processors (MPPs), for identifying a protocol associated with each of a plurality of communication signals using respective data rates extracted therefrom, and for determining, for each of the plurality of communication signals, a respective bit-error rate (BER);

a controller, for generating an alarm indicative of BER excursions beyond a protocol appropriate threshold level appropriate to the associated protocol;

a plurality of optical taps, for sampling each of said plurality of communication signals;

a plurality of photodetectors, for converting each of said plurality of tapped communication signals to electrical signals;

a plurality of combination transimpedance/limiting post amplifiers (TIA/PA), for amplifying each of said plurality of converted communication signals;

a plurality of multi-rate clock and data recovery (CDR) circuits, for locking to the incoming data rates of said plurality of communication signals to extract thereby the respective clock rates; and

a plurality of deserializers (DESER), for convening serial high-speed data of said plurality of communication signals from said plurality of CDR circuits into lower speed parallel data for use by said plurality of MPPs.

6. The apparatus of claim 5, wherein said alarm is adapted to alert at least one of a user and a service provider of a communication signal error.

7. The apparatus of claim 5, wherein said alarm is adapted for use as a control signal to initiate corrective action in response to a communication signal error.

8. Apparatus for multi-protocol and multi-rate optical signal performance monitoring, comprising:

means for identifying a protocol associated with each of a plurality of communication signals by comparing respective data rates extracted therefrom to a stored data rate within a protocol table;

means for determining, for each of the plurality of communication signals, a respective bit-error rate (BER);

means for generating an alarm indicative of BER excursions beyond a protocol appropriate BER threshold level associated with the identified protocol;

means for sampling said each of said plurality of communication signals;

means for converting each of said plurality of tapped communication signals to electrical signals;

means for amplifying each of said plurality of converted communication signals;

means for locking to the incoming data rates of said plurality of communication signals to extract thereby the respective clock rates; and

means for converting serial high-speed data of said plurality of communication signals into lower speed parallel data prior to said means for identifying.

9. The apparatus of claim 8, wherein said protocol table further defines said protocol appropriate BER threshold level.