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US 2018/0005518 A1Published application
Optical network unit, pon system, and method of controlling optical network unit
AssigneeSumitomo Electric Industries, Ltd.
InventorsYasuhiro TAKIZAWA, Shuitsu YUDA
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Abstract
An optical network unit according to one manner of the present invention includes an optical transceiver configured to be connected to an optical communication line, a plurality of media access control (MAC) processing units, a plurality of user network interface (UNI) ports each connected to one MAC processing unit of the plurality of MAC processing units, and an integration unit integrating a plurality of communication paths connected to the plurality of MAC processing units, respectively, and connected to the optical transceiver.
Claims18
1:
- An optical network unit comprising:
- an optical transceiver configured to be connected to an optical communication line;
- a plurality of media access control (MAC) processing units;
- a plurality of user network interface (UNI) ports each connected to one MAC processing unit of the plurality of MAC processing units;
- and
- an integration unit integrating a plurality of communication paths connected to the plurality of MAC processing units, respectively, and connected to the optical transceiver.
3 more elements
2:
- The optical network unit according to claim 1, wherein
- the integration unit sets a communication path for transmitting an upstream signal from among the plurality of communication paths in response to a transmission permission instruction.
3:
- The optical network unit according to claim 1, the optical network unit further comprising a distribution unit distributing, when the optical transceiver receives a downstream signal, the downstream signal to the plurality of MAC processing units.
4:
- The optical network unit according to claim 1, wherein
- the optical transceiver is activated after the integration unit is activated, and
- the integration unit is deactivated when the optical transceiver is deactivated.
5:
- The optical network unit according to claim 1, wherein
- the plurality of MAC processing units include a spare MAC processing unit,
- the optical network unit further comprises a path switching unit for switching a path for communication between the plurality of UNI ports and the plurality of MAC processing units, and
- when a MAC processing unit connected to any of the plurality of UNI ports fails, the path switching unit makes switching from the failed MAC processing unit to the spare MAC processing unit.
1 more element
6:
- The optical network unit according to claim 1, the optical network unit further comprising a spare optical transceiver configured to be connected to the optical communication line together with the optical transceiver.
7:
- The optical network unit according to claim 2, the optical network unit being configured to monitor collision of the transmission permission instructions.
8:
- The optical network unit according to claim 2, wherein
- the plurality of MAC processing units include a stand-by MAC processing unit, and
- the optical network unit further comprises a communication path selection unit arranged between the optical transceiver and the integration unit, the communication path selection unit being configured to connect one of the integration unit and the stand-by MAC processing unit to the optical transceiver.
9:
- The optical network unit according to claim 8, the optical network unit further comprising an instruction unit, wherein
- the instruction unit is configured to output a logical disjunction of the transmission permission instructions to the optical transceiver and to send to the communication path selection unit, an instruction for the communication path selection unit to connect the one of the integration unit and the stand-by MAC processing unit to the optical transceiver.
10:
- The optical network unit according to claim 9, the optical network unit further comprising:
- a first power supply supplying electric power to the plurality of MAC processing units other than the stand-by MAC processing unit;
- and
- a second power supply supplying electric power to the optical transceiver, the stand-by MAC processing unit, the communication path selection unit, and the instruction unit, wherein
- the second power supply is lower in speed of falling than the first power supply.
2 more elements
11:
- The optical network unit according to claim 6, wherein
- the plurality of MAC processing units include a stand-by MAC processing unit,
- the optical network unit further comprises a communication path selection unit connected to the optical transceiver and the spare optical transceiver, and
- the communication path selection unit is configured to select one of a first communication path through which the optical transceiver and the spare optical transceiver are connected to the integration unit and a second communication path through which the optical transceiver and the spare optical transceiver are connected to the stand-by MAC processing unit.
1 more element
12:
- The optical network unit according to claim 11, the optical network unit further comprising an instruction unit, wherein
- the instruction unit is configured to output any one of a logical disjunction of the transmission permission instructions and the transmission permission instruction from the stand-by MAC processing unit to the optical transceiver and the spare optical transceiver and to send to the communication path selection unit, an instruction for the communication path selection unit to select the one of the first communication path and the second communication path.
13:
- The optical network unit according to claim 12, the optical network unit further comprising:
- a first power supply supplying electric power to the plurality of MAC processing units other than the stand-by MAC processing unit;
- and
- a second power supply supplying electric power to the optical transceiver, the spare optical transceiver, the stand-by MAC processing unit, the communication path selection unit, and the instruction unit, wherein
- the second power supply is lower in speed of falling than the first power supply.
2 more elements
14:
- The optical network unit according to claim 7, wherein
- when a first transmission permission instruction and a second transmission permission instruction which is generated subsequent to the first transmission permission instruction collide against each other, the optical network unit gives a transmission permission for transmission of the upstream signal to a MAC processing unit which has issued the first transmission permission instruction.
15:
- The optical network unit according to claim 8, wherein
- when a first transmission permission instruction issued from a MAC processing unit other than the stand-by MAC processing unit and a third transmission permission instruction issued from the stand-by MAC processing unit collide against each other, the optical network unit gives a transmission permission for transmission of the upstream signal to the stand-by MAC processing unit.
16:
- The optical network unit according to claim 8, wherein
- when a first transmission permission instruction issued from a MAC processing unit other than the stand-by MAC processing unit and a third transmission permission instruction issued from the stand-by MAC processing unit collide against each other, the optical network unit selects one of the first transmission permission instruction and the third transmission permission instruction in accordance with priority set in advance.
17:
- A passive optical network (PON) system comprising:
- an optical communication line;
- an optical line terminal connected to the optical communication line;
- and
- an optical network unit connected to the optical communication line,
- the optical network unit including
- an optical transceiver configured to be connected to the optical communication line,
- a plurality of media access control (MAC) processing units,
- a plurality of user network interface (UNI) ports each connected to one MAC processing unit of the plurality of MAC processing units, and
- an integration unit integrating a plurality of communication paths connected to the plurality of MAC processing units, respectively, and connected to the optical transceiver.
7 more elements
18:
- A method of controlling an optical network unit, the optical network unit including an optical transceiver configured to be connected to an optical communication line, a plurality of media access control (MAC) processing units, a plurality of user network interface (UNI) ports each connected to one MAC processing unit of the plurality of MAC processing units, and an integration unit integrating a plurality of communication paths connected to the plurality of MAC processing units, respectively, and connected to the optical transceiver, the method comprising;
- generating a transmission permission instruction by one MAC processing unit of the plurality of MAC processing units;
- and
- setting a communication path for transmitting an upstream signal from among the plurality of communication paths in response to the transmission permission instruction.
1 more element