CONTROL OF ONU ACTIVATION IN HIGH BIT RATE PONs
AssigneeNokia Solutions and Networks Oy
InventorsDoutje Van Veen, Vincent Houtsma
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Abstract
A method and apparatus is proposed for performing the ONU activation process in a PON having a standard line rate of 50 G or higher. The method and apparatus are based upon having the OLT instruct any activating ONUs to transmit at a line rate that is less than 50 G, which allows for an OLT receiver without any particular equalization configuration to accurately recover the upstream burst-mode transmissions from the activating ONUs. Once the activation process is completed, the OLT may instruct the new ONUs to reset their transmitters to operate at the higher line rate of the PON. Alternatively, at the end of the activation process, the new ONUs may be configured to automatically reset their transmitters to higher line rate.
Claims20
An apparatus, for use by an optical line terminal (OLT) in a passive optical network (PON) and communicatively connected to one or more high-rate optical network units (ONUs) operating at a predefined high upstream line rate, the apparatus comprising:
- at least one memory including instructions;
- at least one processor configured to execute the instructions and cause the apparatus to perform an ONU activation process including:
- recovering burst-mode upstream activation messages from a new high-rate ONU, the activation messages transmitted at a reduced upstream line rate less than the predefined high upstream line rate;
- generating, in response to the recovered burst-mode activation messages n, specific ONU operating parameters;
- and
- transmitting the specific ONU operating parameters to the new high-rate ONU.
A method, for use by an optical line terminal (OLT) communicatively connected to a plurality of ONUs within a passive optical network (PON), with one or more high-rate ONUs operating at a predefined high upstream line rate, comprising:
- during an ONU activation process,
- recovering burst-mode upstream activation messages from a new high-rate ONU, the activation messages transmitted at a reduced upstream line rate less than the predefined high upstream line rate;
- generating, in response to the recovered burst-mode activation messages, specific ONU operating parameters;
- and
- transmitting the specific ONU operating parameters to the new high-rate ONU.
An apparatus, for use by an ONU operating at a predefined upstream line rate in a passive optical network (PON), the ONU communicatively connected to an OLT, the apparatus comprising:
- at least one memory including instructions;
- at least one processor configured to execute the instructions and cause the apparatus to perform an ONU activation process including:
- transmitting burst-mode upstream activation messages to the OLT at a reduced line rate less than the predefined upstream line rate;
- receiving specific ONU operating parameters from the OLT in response to the upstream activation messages;
- and
- upon completion of the activation process, switching the burst-mode upstream transmission rate to the predefined upstream line rate.
A method, for use by high-rate ONUs communicatively connected to an OLT in a PON, comprising:
- during an activation process at a new high-rate ONU,
- transmitting burst-mode upstream activation messages to the OLT at a reduced line rate less than a predefined upstream line rate associated with the high-rate ONUs;
- receiving specific ONU operating parameters from the OLT in response to the upstream activation messages;
- and
- upon completion of the activation process, switching the burst-mode upstream transmission rate to the predefined upstream line rate.
The method according to claim 817 wherein the predefined upstream line rate is at least 50 G and the reduced line rate is no greater than 25 G.
Dependencies are inferred from the claim text.