PON SYSTEM, OPTICAL NETWORK UNIT USED THEREIN, AND TRANSMISSION CONTROL METHOD THEREFOR
First Claim
1. An optical network unit in a PON system, the optical network unit being capable of performing bidirectional optical communication with an optical line terminal through a passive light splitting node, and performing upstream transmission of a FEC frame including a variable length frame to the optical line terminal, and comprising:
- a grant processing unit that determines whether an amount of allocation specified in a grant is one unit amount of data of the FEC frame, the grant being a report request; and
a frame transmitting unit that transmits only a report to the optical line terminal if a result of the determination is affirmative.
1 Assignment
0 Petitions
Accused Products
Abstract
An object of the present invention is to improve the accuracy of bandwidth control by an optical line terminal 1 by preventing an optical network unit 2 from performing upstream transmission of an amount of data that is not expected by the optical line terminal 1. The optical network unit 2 of the present invention is an optical network unit in a PON system, which is capable of performing bidirectional optical communication with the optical line terminal 1 through a passive light-splitting node 6, and which performs upstream transmission of a FEC frame including a variable length frame to the optical line terminal 1. The optical network unit 2 includes a grant processing unit 207 that determines whether an amount of allocation specified in a grant G1 which is a report request is one unit amount of data (one FCW) of the FEC frame; and a frame transmitting unit 206 that transmits only a report R to the optical line terminal 1 if a result of the determination is affirmative.
15 Citations
6 Claims
-
1. An optical network unit in a PON system, the optical network unit being capable of performing bidirectional optical communication with an optical line terminal through a passive light splitting node, and performing upstream transmission of a FEC frame including a variable length frame to the optical line terminal, and comprising:
-
a grant processing unit that determines whether an amount of allocation specified in a grant is one unit amount of data of the FEC frame, the grant being a report request; and a frame transmitting unit that transmits only a report to the optical line terminal if a result of the determination is affirmative. - View Dependent Claims (2, 3, 4)
-
-
5. A PON system comprising:
- an optical line terminal; and
a plurality of optical network units performing bidirectional optical communication with the optical line terminal through a passive light-splitting node, the optical network units each performing upstream transmission of a FEC frame including a variable length frame to the optical line terminal, whereinwhen any of the optical network units receives a grant and an amount of allocation specified in the grant is one unit amount of data of the FEC frame, the optical network unit transmits only a report to the optical line terminal, the grant being a report request.
- an optical line terminal; and
-
6. A transmission control method for an optical network unit performed when the optical network unit performing bidirectional optical communication with an optical line terminal through a passive light-splitting node performs upstream transmission of a FEC frame including a variable length frame, based on a grant received from the optical line terminal, the transmission control method comprising:
allowing the optical network unit to transmit only a report when an amount of allocation specified in the grant is one unit amount of data of the FEC frame, the grant being a report request.
Specification