Alcatel Lucent

Other

Nokia Solutions and Networks Oy

Alcaltel Lucent

Michael Straub

Harald Schmuck

Jörg Hehmann

Thomas Pfeiffer

Joerg Hehmann

Rene Bonk

Nagaraj Prasanth Anthapadmanabhan

Patrick Iannone

Stijn Meersman

Edward Harstead

Rudi Vankeirsbilck

Yannick Clybouw

Lothar Jentsch

Bonk René

Rudl Vankeirsbilck

A PON system comprising multiple PONs, each having a respective intelligent splitter monitor (ISM). In addition to having a passive optical splitter therein, an ISM also has several remotely powered active components configured to monitor the presence of uplink light signals on the ports of the splitter and communicate with the central office using out-of-band optical signals. These ISM functionalities enable the network operator, e.g., to automatically map PON connectivity, pairing each port on the splitter with a distinct optical network unit. The PON system further comprises an optical module connected to the multiple PONs through an optical switch in a manner that supports shared access to said module by the corresponding multiple ISMs. In an example embodiment, the optical module comprises an optical transceiver capable of communicating with the ISM transceivers and one or more lasers configured to provide high-intensity light for remotely charging the ISM batteries.

Monitoring multiple passive optical networks

Delays in the transmission of ULL traffic are avoided or substantially reduced by the initiation of opportunistic and probability-based in-band, traffic-free time period windows that do not correspond to time periods of ULL traffic transmissions.

Systems and methods for avoiding delays for ULL traffic

The invention relates to a method for performing network functions for a subscriber-sided (CPE) network access unit (ONT) in a telecommunication's access network with a central unit (CO, OLT), a distribution network (AN), and a multiple of network-sided network termination units (DPD) with subscriber-sided network access units (ONT) connected or connectable thereto, in which network a bidirectional communication path () is present between the central unit (CO) and that network-sided network termination unit (DPD), to which the subscriber-sided network access unit (ONT) under consideration is connected, in which for performing network functions a further bidirectional communication path () between the subscriber-sided network access unit (ONT) under consideration and the corresponding network-sided network termination unit (DPD) is used in connection with the bidirectional communication path () between the central unit (CO, OLT) and that network-sided network termination unit (DPD), as well as to a telecommunication's access network (FIG.), a central unit (CO, OLT), a network-sided network termination unit (DPD), and a subscriber-sided network access unit (ONT).

Method and apparatuses for performing network functions in a passive optical network

A method, apparatus, and system for network monitoring, and more specifically for correlating downstream devices in an optical network with downstream ports of an optical splitter through which they are communicating with a central office. The downstream devices operational on the network are indentified and listed in a correlation table. Selected subsets of these devices are then monitored, preferably by an ISM under the direction of a management node, in a series of monitoring cycles until a satisfactory correlation may be achieved. The correlation cycle may be performed at startup, as needed, or on a periodic basis.

Apparatus and method for optical-network monitoring

Proposed is an optical data transmission device for an optical access network that comprises a laser transmission unit, which generates an optical transmission signal, and a driving unit, which controls the laser transmission unit for modulating the transmission signal. The device comprises an optical reception unit that converts the received optical signal into an electrical measurement signal. For this, the reception unit contains a photo-diode and an electrical amplifier. The optical reception unit is separate from the laser transmission unit. A control unit controls the laser transmission unit, such that the optical transmission signal is modulated in dependence on a measurement signal. The control unit measures multiple electrical measurement signals during a measurement interval and determines an averaged received electrical measurement signal. Even furthermore, the control unit controls the electrical amplifier, such that the electrical amplifier is turned off during a time interval prior to the measurement interval.

Optical data transmission device

The invention relates to a method for monitoring a passive optical network having a tree-like structure with a main line and a plurality of branches. The method includes transmitting a wake-up signal from an optical line termination (OLT) arranged in the main line to a plurality of monitoring units arranged in the branches. The method also includes detecting the wake-up signal and listening to information requests from the OLT in the monitoring units during a listening time interval after the detection of the wake-up signal. The method further includes transmitting an information request to be received in the listening time interval from the OLT to the monitoring units. The method additionally includes receiving the information request in the monitoring units during the listening time interval, one of the monitoring units which is addressed by the information request transmitting a response message back to the OLT.

Monitoring method for a passive optical network

A method for monitoring a passive optical network (), PON, having a tree-like structure with a main line () and at least two branches (to), comprising: transmitting a wake-up signal () from the main line () to at least two monitoring units (DPMto DPM) arranged in the at least two branches (to), in each of the monitoring units (DPMto DPM), detecting the wake-up signal () and transmitting a response signal (A, B, C) back to the main line (), each of the monitoring units (DPMto DPM) generating a pre-defined time delay (&#x394;tto &#x394;t) between the detection of the wake-up signal () and the start of the transmission of the response signal (A, B, C), and receiving the response signals (A, B, C) at the main line (), the receiving times (Rto R) of the response signals (A, B, C) being different from each other, the difference between the receiving times (Rto R) being adjusted by the pre-defined time delays (&#x394;tto &#x394;t) of the monitoring units (DPMto DPM).

Method for monitoring a passive optical network using monitoring units

An optical network having a tree-like structure with a main line and a plurality of branches, at least two of the branches comprising a monitoring unit for upstream signalling to the main line, wherein each of the monitoring units comprises a signal generation unit with a light source for generation of a pre-defined optical signal, and the monitoring units are construed to generate pre-defined optical signals which are different from each other, as well as a monitoring unit for generating a periodic upstream signal in such an optical network and a method for monitoring such an optical network.

Growing community of inventors

Maulbronn, Germany

Michael Straub