Method for dynamically establishing logical link in PON systems and an optical network unit for the method

• US 20060083245A1
• Filed: 10/13/2005
• Published: 04/20/2006
• Est. Priority Date: 10/14/2004
• Status: Active Grant

• Current Assignee: KDDI Corporation
• Original Assignee: KDDI Corporation
• Inventors: Tanaka, Keiji, Edagawa, Noboru
• Granted Patent: US 7,558,482 B2
• Time in Patent Office: Days
• US Class Current: 370/395.200
• CPC Class Codes: H04L 12/12 Arrangements for remote connection or disconnection of substations or of equipment thereof
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

The invention is applied to a PON system including an optical line terminal (OLT) at a center station, a plurality of optical network units (ONUs) at subscribers'"'"' sites, and an optical transmission line shared by the plurality ONUs to optically connect between the OLT and the plurality of ONUs. Each of the ONUs requests the OLT to assign a logical link according to start-up of an application.

Claims

1. In a PON system including an optical line terminal (OLT) at a center station, a plurality of optical network units (ONUs) at subscribers'"'"' sites, and an optical transmission line shared by the plurality ONUs to optically connect between the OLT and the plurality of ONUs, method for dynamically establishing logical link characterized in that each of the ONUs requests the OLT to assign a logical link according to start-up of an application.

2. The method of claim 1 characterized in that each of the ONUs breaks the assigned logical link according to end of the application.

3. The method of claim 1 characterized in that the start-up of the application means power-on of a device on which the application operates.

4. The method of claim 1 characterized in that the end of the application means power-off of the device on which the application operates.

5. An ONU disposed at each subscriber'"'"'s site in a PON system comprising:

first means to request an OLT of the PON system to assign its own logical link in response to a predetermined inquiry message received after the ONU is powered on;

a start-up detector to detect a start-up of a communication device connected to the ONU; and

second means to request the OLT to assign a logical link for the communication device according to the start-up of the communication device.

6. The ONU of claim 5 further comprising third means to break the assigned logical link according to the end of the communication device, wherein the start-up detector has a function to detect end of the communication device.

7. The ONU of claim 6 characterized in that the start-up of the communication device means the power-on of the communication device.

8. The ONU of claim 5 characterized in that the end of the communication device means the power-off of the communication device.