Optical line terminal in gigabit passive optical network and method for transmitting broadcast frame using the same
AssigneeElectronics and Telecommunications Research Institute
InventorsKyeong-hwan Doo, Bin-yeong Yoon, Dong-soo Lee
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Abstract
Disclosed are an optical line terminal in a gigabit passive optical network and a method for transmitting a broadcast frame using the same. The optical line terminal allocates second port identifiers to optical network units such that a broadcast frame is prevented from being retransmitted to an optical network unit which has transmitted the broadcast frame to the optical line terminal.
Claims11
An optical line terminal for a gigabit-capable passive optical network, the optical line terminal comprising:
- an identifier table to store first port identifiers and second port identifiers which are allocated to a plurality of optical network units, in which the second port identifier prevents a broadcast frame from being retransmitted to an optical network unit which has transmitted the broadcast frame;
- and
- a controller to change, when receiving a broadcast frame from an optical network unit, a first port identifier of the broadcast frame into a second port identifier matching the first port identifier with reference to the identifier table to configure a broadcast frame including the second port identifier and transmit the broadcast frame including the second port identifier to the optical network unit.
A method of transmitting a broadcast frame in an optical line terminal for a gigabit-capable passive optical network, the method comprising:
- receiving a upstream frame from an optical network unit;
- changing a first port identifier of the upstream frame into a second port identifier matching the first port identifier with reference to an identifier table storing first port identifiers and second port identifiers that are allocated to optical network units to configure a frame including the second port identifier;
- and
- transmitting the frame including the second port identifier downstream,
- wherein the second port identifier is registered in the optical network unit to prevent the upstream frame from being retransmitted to the optical network unit which has transmitted the upstream frame.
An information storage medium storing a data structure of an optical line terminal for a gigabit-capable passive optical network, the information storage medium comprising port identifiers, which are allocated to the optical network units such that a broadcast frame is prevented from being retransmitted to an optical network unit, which has transmitted the broadcast frame to the optical line terminal.
Dependencies are inferred from the claim text.