Probabilistic bandwidth control in a passive optical network (PON)
AssigneeBroadcom Corporation
InventorsGlen Kramer, Lowell D. Lamb
Life of this patent
Estimating the term…
Abstract
Embodiments provide systems and methods for a probabilistic reporting mode, where an Optical Network Unit (ONU) sends a REPORT message only when it has data to transmit. The absence of a REPORT message from an ONU is treated by the Optical Line Terminal (OLT) as indicating absence of data to transmit at the ONU. In another aspect, embodiments include systems and methods for an unsolicited burst mode, where an ONU can be configured to transmit data in the upstream in an unsolicited manner. The unsolicited burst mode includes mechanisms to ensure that no data is lost due to potential collisions between ONUs.
Claims20
An Optical Network Unit (ONU), comprising:
- a memory that stores logic instructions;
- and
- processor circuitry configured, by executing the logic instructions, to:
- receive a GATE message from an Optical Line Terminal (OLT);
- determine whether the GATE message includes a broadcast Logical Link Identifier (LLID) or a multicast LLID;
- and
- if the GATE message includes the broadcast LLID or the multicast LLID,
- transmit a REPORT message to the OLT, in response to the GATE message, when a probabilistic reporting (PR) mode is enabled and data is available for upstream transmission at the ONU,
- wherein the processor circuitry is further configured to set the PR mode at the ONU responsive to the GATE message.
An Optical Network Unit (ONU), comprising:
- a memory that stores logic instructions;
- and
- processor circuitry configured, by executing the logic instructions, to:
- receive a GATE message from an Optical Line Terminal (OLT);
- determine whether the GATE message includes a broadcast Logical Link Identifier (LLID) or a multicast LLID;
- and
- if the GATE message includes the broadcast LLID or the multicast LLID,
- transmit a REPORT message to the OLT, in response to the GATE message, when a probabilistic reporting (PR) mode is enabled and data is available for upstream transmission at the ONU,
- wherein the processor circuitry is further configured to set the PR mode at the ONU independent of the OLT.
An Optical Line Terminal (OLT) connected to a plurality of Optical Network Units (ONUs) by a shared optical medium, comprising:
- a memory that stores logic instructions;
- and
- processor circuitry configured, by executing the instructions, to:
- detect a first unsolicited data burst from a first ONU of the plurality of ONUs;
- broadcast a TX REFRAIN message in response to detecting the first unsolicited data burst, the TX REFRAIN message instructing other ONUs of the plurality of ONUs to refrain from transmission;
- broadcast a TX RESUME message when the unsolicited data burst ends;
- detect an idle state over the shared optical medium;
- and
- suspend transmission of GATE messages over the shared optical medium in response to the idle state.
A Optical Line Terminal (OLT) connected to a plurality of Optical Network Units (ONUs) by a shared optical medium, comprising:
- a memory that stores logic instructions;
- and
- processor circuitry configured, by executing the logic instructions, to:
- determine an upstream activity level of a first ONU of the plurality of ONUs;
- and
- transmit a first unicast GATE message to the first ONU, the first unicast GATE message configured to set a reporting mode of the first ONU in response to the determined upstream activity level of the first ONU.
Dependencies are inferred from the claim text.