| US 7,493,043 B2 | ||
| ONU management method and optical line termination | ||
| Toshiyuki Saito, Yokohama (Japan); Takahiro Yoshida, Tokyo (Japan); Yasunari Shinohara, Fujisawa (Japan); and Junya Shimofusa, Fujisawa (Japan) | ||
| Assigned to Hitachi Communication Technologies, Ltd., Tokyo (Japan) | ||
| Filed on Mar. 03, 2006, as Appl. No. 11/366,838. | ||
| Claims priority of application No. 2005-326955 (JP), filed on Nov. 11, 2005. | ||
| Prior Publication US 2007/0110441 A1, May 17, 2007 | ||
| Int. Cl. H04J 14/00 (2006.01) | ||
| U.S. Cl. 398—71 | 5 Claims |
| 1. An optical line termination in a passive optical network system in which each of one or plural first optical network units
at user side and the optical line termination at station side are connected to each other through an optical fiber and a splitter,
and communication is performed in accordance with an identifier assigned to each of the first optical network units connected
to the optical line termination, the optical line termination comprising:
a first storage area in which unique numbers of the first optical network units and individual setting information concerning
communication and/or users of the first optical network units are stored correspondingly to the identifier of the first optical
network unit;
a second storage area in which the unique number of the first optical network unit which is specified as a replacement object
from among the first optical network units is stored correspondingly to the identifier; and
a processing unit to perform a processing to replace one of the connected first optical network units by a second optical
network unit,
wherein the processing unit
receives a replacement instruction including the identifier of the first optical network unit specified as the replacement
object from an operation system,
acquires the unique number of the first optical network unit corresponding to the specified identifier from the first storage
area, and stores the acquired unique number of the first optical network unit into the second storage area correspondingly
to the specified identifier,
deletes the unique number corresponding to the specified identifier from the first storage area,
acquires the unique number of the first optical network unit or a unique number of the second optical network unit newly connected
instead of the first optical network unit,
judges whether the acquired unique number is stored in the second storage area,
stores, in a case where the unique number of the second optical network unit is acquired thereby being judged that the acquired
unique number is not stored in the second storage area, the acquired unique number into the first storage area correspondingly
to the specified identifier; and
repeats, in a case where the unique number of the first optical network unit is acquired thereby being judged that the acquired
unique number is stored in the second storage area, the acquiring the unique number of the first or the second optical network
unit, the judging and the storing into the first storage area.
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