Maintenance link system and method

• US 6,581,121 B1
• Filed: 02/22/2001
• Issued: 06/17/2003
• Est. Priority Date: 02/25/2000
• Status: Expired due to Term

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Telica, Inc. (Nokia Corporation)
• Inventors: Kittlitz, Edward N., Caldara, Stephen A., Manning, Thomas A., Garcen, Sean
• Primary Examiner(s): Picard, Leo
• Assistant Examiner(s): Masinick, Michael D
• Application Number:
  US09/790,836
• Time in Patent Office: 845 Days
• Field of Search: 710/300, 710/302, 455/181.1, 361/728, 361/729, 361/784, 361/788, 370/248, 370/217, 370/463
• US Class Current: 710/300
• CPC Class Codes: H04Q 2213/13166 Fault prevention
• CPC Class Codes: H04Q 2213/13167 Redundant apparatus
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/1332 Logic circuits
• CPC Class Codes: H04Q 3/54558 Redundancy, stand-by

Abstract

A system and method for monitoring and maintaining a plurality of modules are described. Each module of the plurality of modules includes at least one link slave device, and a link controller is connected to link slave devices via a plurality of individual serial, bidirectional connections. The link slave devices and the link controller include protocol logic for communication according to a bidirectional protocol. At predefined time segments and predefined periodicity, the link slave devices drive the corresponding bidirectional link to the controller to provider maintenance information to the controller. At other predefined time segments, the controller drives the bidirectional link to issue commands to the link slave devices. The link slave devices and the link controller include protocol logic for communicating according to a protocol in which all slave devices communicate to the link controller at substantially the same period of time so that the latency for collecting information from the slave devices is independent of the number of such devices.

Claims

1. A system for monitoring and maintaining a plurality of modules, comprising:

a plurality of link slave devices, in which each module of the plurality of modules includes at least one link slave device;

a link controller;

a plurality of individual serial, bidirectional connections, each connecting the controller to a corresponding link slave device;

wherein the link slave devices and the link controller include protocol logic for communicating according to a bidirectional protocol in which at predefined time segments and predefined periodicity the link slave devices can drive the corresponding bidirectional link to the controller to provide maintenance information to the controller, and in which at other predefined time segments the controller can drive the bidirectional link to issue commands to the link slave devices.

4. The system of claim 1, further comprising a second link controller, wherein the slave devices are connected to the second link controller with independent connections and wherein the slave devices communicate to both the first and second controllers simultaneously.

7. The system of claim 1 wherein the protocol includes fault detection logic.

8. The system of claim 1 wherein the protocol includes framing error logic.

9. The system of claim 1 wherein the link slave devices drive the corresponding bi-directional link to the controller without requirement of a polling command from the controller.

2. A system for monitoring and maintaining a plurality of modules, comprising:

a plurality of link slave devices, in which each module of the plurality of modules includes at least one link slave device;

a link controller;

a plurality of bidirectional connections, each connecting the controller to a corresponding link slave device;

wherein the link slave devices and the link controller include protocol logic for communicating according to a protocol in which all slave devices communicate to the link controller at substantially the same period of time so that the latency for collecting information from the slave devices is independent of the number of such devices.

10. The system of claim 2 wherein the protocol includes fault detection logic.

11. The system of claim 2 wherein the protocol includes framing error logic.

12. The system of claim 2 wherein the link slave devices drive the corresponding bi-directional connection to the controller without requirement of a polling command from the controller.

3. A system for monitoring and maintaining a plurality of modules, comprising:

a plurality of link slave devices, in which each module of the plurality of modules includes at least one link slave device;

a link controller;

a plurality of connections, each connecting the controller to a corresponding link slave device;

wherein the link slave devices and the link controller include protocol logic for communicating according to a protocol in which all slave devices communicate status and interrupt information to the link controller and the link controller communicates command operations to the slave device.

13. The system of claim 3 wherein the protocol includes fault detection logic.

14. The system of claim 3 wherein the protocol includes framing error logic.

15. The system of claim 3 wherein the link slave devices drive the corresponding connection to the controller without requirement of a polling command from the controller.

5. A method of monitoring and maintaining a plurality of modules, comprising the acts of:

establishing individual serial, bidirectional connections between a link controller and a plurality of link slave devices, in which each module of the plurality of modules includes at least one link slave device;

at predefined time segments and predefined periodicity, the link slave devices driving the corresponding bidirectional link to the controller to provide maintenance information to the controller, and

at other predefined time segments, the controller driving the bidirectional link to issue commands to the link slave devices.

6. A method of monitoring and maintaining a plurality of modules, comprising the acts of:

establishing individual serial, bidirectional connections between a link controller and a plurality of link slave devices, in which each module of the plurality of modules includes at least one link slave device;

all slave devices communicating to the link controller at substantially the same period of time so that the latency for collecting information from the slave devices is independent of the number of such devices.