US9270368B2 - Methods and apparatuses for improved Ethernet path selection using optical levels - Google Patents
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Definitions
- the present invention relates to a method and apparatus for providing enhanced Ethernet path selection using optical levels.
- Telcos or large carriers such as AT&T and Verizon, which can provide telecommunications and data communications services to customers throughout large geographic areas, are increasingly using Ethernet but still support significant SONET infrastructure. Telcos want to provide Carrier Ethernet with the same quality of service (QoS) as SONET QoS. Unlike service providers for Enterprise Ethernet networks (e.g., in buildings, and on campuses), these telcos or larger carriers are accustomed to using SONET metrics such as bit error rate (BER) of SONET payload for path degradation detection. Unlike SONET, however, Ethernet transmission has no meaningful BER metric. For example, Ethernet packets vary significantly and, as such, their degradation or loss does not correlate accurately to a BER, yet packet loss can be significant. Further, unlike Enterprise Ethernet providers, telcos are required to guarantee a level of QoS to customers for SONET as well as any Ethernet service they provide. A need therefore exists for convenient employment of a more accurate QoS metric for larger carrier Ethernet transport.
- telcos or large carriers providing Carrier Ethernet a need also exists for protection switching to occur as quickly as possible and with the lowest errors possible.
- many fiber optic Ethernet devices that support redundant or aggregated data paths employ Loss of Signal (LOS) to indicate a failing data path and, accordingly, a need to switch to alternate data path(s).
- LOS Loss of Signal
- Existing Ethernet devices are disadvantageous because excessive errors may occur on the failing data path before LOS occurs in the event of seriously degraded fiber optic performance.
- Ethernet path selection can occur, for example, in the context of Ethernet Automatic Protection Switching (APS) (e.g., as defined in Recommendation ITU-T G.8031 for linear 1:1 or 1+1 protection switching mechanism for VLAN-based Ethernet networks).
- APS Ethernet Automatic Protection Switching
- G.8031 supports 1:1 linear protection through implementation of point-to-point Ethernet Tunnels providing a working and protecting Ethernet circuit, where the path providing the protection is always available through health-monitoring.
- CCM Connectivity Check Messages
- a failure of a link or node affects the working or primary Ethernet tunnel path, the services will fail to receive the CCMs exchanged on that path or will receive a fault indication (e.g., LOS) from the link layer OAM module.
- a fault indication e.g., LOS
- Network equipment declares connectivity failure when a designated number of consecutive CCMs (e.g., three) are lost. For example, when a path has degraded but has not completely failed, one in four CCMs may be received, leaving 75% of the data being possibly in error and with no alarm message or declaration of path failure. Thus, degraded path conditions continue to occur.
- a LOS signal is not generated or asserted until a designated optical level (e.g., ⁇ x dbm) parameter or condition is met.
- a designated optical level e.g., ⁇ x dbm
- an optical path can be operating under degraded conditions long before received optical signal level meets the designated level for asserting LOS.
- an apparatus for and method of enhanced monitoring for optical signal level degradation obtains at least one diagnostic level from a small form-factor pluggable (SFP) transceiver connected to an optical path, the diagnostic level comprising at least the designated level for asserting loss of signal (LOS) by the SFP transceiver; determines at least one parameter corresponding to a low receive level threshold for an optical path having a value that is above the SFP LOS assertion level by a designated amount; receives Rx level for the optical path from the transceiver; determines if the received Rx level satisfies the low receive level threshold; and asserts an enhanced (ELOS) when the received Rx level reaches the low receive level threshold.
- SFP small form-factor pluggable
- the parameter is a margin designating a selected value above, at, or below a reference diagnostic level.
- the margin can be a selected value relative to an alarm level.
- the method and apparatus can generate a prompt via a user interface for the user to enter a user-settable value for the parameter and store the user-settable value.
- the apparatus and method can store a parameter corresponding to a recovery threshold for the optical path, the recovery threshold being a value that is greater than the low receive level threshold.
- the apparatus and method also de-assert the Loss of Signal or other fault indication due to the received Rx level reaching the low receive level threshold when the received Rx level satisfies the recovery threshold.
- the apparatus and method further perform a logical OR operation using the enhanced Loss of Signal (ELOS) generated when the received Rx level reaches the low receive level threshold, and a Loss of Signal provided by the SFP transceiver when the received Rx level reaches the SFP LOS assertion level.
- ELOS enhanced Loss of Signal
- the apparatus and method also transmit an output of the logical OR operation (e.g., an alarm or fault indication) to a network device in which the transceiver is deployed such that the network device can commence path selection to remove the degraded optical path.
- an output of the logical OR operation e.g., an alarm or fault indication
- FIG. 1 is a block diagram of an Ethernet network and network elements constructed in accordance with an illustrative embodiment of the present invention
- FIG. 2 is a block diagram of an enhanced Loss of Signal module in accordance with an illustrative embodiment of the present invention.
- FIG. 3 depicts a process flow for operation of an enhanced Loss of Signal module in accordance with an illustrative embodiment of the present invention.
- a system 8 for providing Ethernet services comprises network equipment (NE) comprising a far end (FE) device 12 and a near end (NE) device 10 connected to a fiber optic link indicated generally at 14 .
- the fiber optic link 14 comprises multiple paths for redundancy or aggregation.
- the fiber optic link 14 can extend, for example, between any of a remote terminal (RT), Hut, CEV, building telephone room, or central office, and any of a cell site suite, building rooftop, or customer premise, as well as between NEs used for campus or intrabuilding connections, with the NEs 10 , 12 deployed (e.g., as a card or Network Interface Device (NID)) at one of these illustrative locations on respective ends of the fiber optic link 14 .
- RT remote terminal
- Hut Hut
- CEV building telephone room
- central office any of a cell site suite, building rooftop, or customer premise
- NEs 10 , 12 deployed (e.g., as a card or Network Interface Device (NID)) at one of these illustrative locations on respective ends of the fiber optic link 14 .
- NID Network Interface Device
- the NEs 10 , 12 each employ at least two transceivers 16 , 18 such as small form-factor pluggables (SFPs) 16 a , 16 b at NE 12 and SFPs 18 a , 18 b at NE 10 .
- SFPs small form-factor pluggables
- ELOS enhanced Loss of Signal module
- the transceivers 16 , 18 are SFPs for illustrative purposes.
- a small form-factor pluggable (SFP) is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications.
- the form factor and electrical interface are specified by a multi-source agreement (MSA) and standardized by the SFF Committee (e.g., in the SFP specification INF-8074i available at ftp://ftp.seagate.com/sff/INF-8074.pdf), and is incorporated by reference herein in its entirety.
- An SFP is plugged into communication devices, such as switches and routers or similar network equipment (NE), to provide a media conversion, such as converting electrical signals to optical signals for transport over fiber optics.
- NE network equipment
- an SFP transceiver interfaces a network device motherboard (e.g., for a switch, router, media converter or similar network equipment) to a fiber optic or copper networking cable.
- SFP transceivers are designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards and have been used for data rates of 1 Gbit/s to 5 Gbit/s.
- the devices 10 , 12 can employ other commercially available form-factor pluggable transceivers which operate at higher rates or lower rates than SFPs.
- the form-factor pluggable transceivers 16 , 18 can be, but are not limited to, a gigabit interface converter (GBIC), SFP+, 10 gigabit (G) SFP (XFP), a Quad SFP (QSFP) supporting 10 G per channel (i.e., 40 G), a centum (C) or CFP transceiver (e.g., supports 10 ⁇ 10 Gbit/s and 4 ⁇ 25 Gbit/s variants of 100 Gbit/s interconnects), Xenpack module, or a dongle, among other transceiver devices.
- GBIC gigabit interface converter
- G gigabit
- XFP 10 gigabit
- QSFP Quad SFP
- C centum
- CFP transceiver e.g., supports 10 ⁇ 10 Gbit/s and 4 ⁇ 25 Gbit/s variants of 100 G
- the form-factor pluggable transceivers 16 , 18 have built-in diagnostic capabilities to determine and output receive (Rx) level information relating to optical input power to its host device 10 , 12 .
- Rx receive
- Provision of the Rx level information is specified, for example, by the above-mentioned multi-source agreement (MSA) and standardized by the SFF Committee. See, for example, the specification INF-8074i available at ftp://ftp.seagate.com/sff/INF-8074.pdf and the specification SFF-8472 available at ftp://ftp.seagate.com/sff/SFF-8472.PDF, and any other SFF Committee documents or similar specifications for SFPs or other types of transceivers.
- the MSA defines the presence, location, and format of the Rx level information, and then individual SFP manufacturers determine, for example, the values per SFP device that are provisioned or otherwise configured in the devices. For example, such values as Rx sensitivity level, Rx Alarm and Warning levels, and Rx LOS assert and de-assert levels can be designated by an SFP manufacturer based on performance characteristics of the SFP (e.g., rate, wavelength), and stored on the SFP. These SFP values can be read from the SFP by a host device.
- these values can be used to determine the appropriate Rx thresholds to assert or de-assert an enhanced LOS or otherwise provide an alarm or warning before conventional conditions that precipitate a conventional LOS occur.
- the NEs 10 and 12 are each provided with an enhanced loss of signal (ELOS) module 20 which may be implemented in hardware and/or software.
- software comprising an instruction set can be downloaded to a memory in the NE 10 , 12 , or a programmable gate array (e.g., an FPGA), programmable integrated circuit (IC) (e.g., a microprocessor, or microcontroller), or other processing device that cooperates with the NE's processor can be provided to the NE (e.g., as a pluggable unit to or otherwise mounted on the NE printed circuit board).
- a programmable gate array e.g., an FPGA
- IC programmable integrated circuit
- microprocessor e.g., a microprocessor, or microcontroller
- the ELOS module 20 comprises a memory or cooperates with a memory device of the NE processor to store parameters such as margins for deriving thresholds relative to optical input power (e.g., Rx level) conditions that contribute to the generation or assertion of a Loss of Signal (LOS) by the NE 10 , 12 or removal or de-assertion of LOS after recovery.
- a NE ELOS module 20 receives the Rx level information from a transceiver 16 , 18 in the NE 10 , 12 , analyzes the Rx level information using the stored parameters such as margins described below relating to optical input power conditions, and generates a system LOS if an optical input power condition is met. Accordingly, the ELOS module 20 operates to regenerate the LOS status from the transceiver (e.g., SFP module 16 , 18 ) such that an LOS can be forwarded to the NE 10 , 12 when either SFP LOS or designated Rx Low level condition exists.
- the present invention is advantageous because it allows forcing LOS on a low Rx level, thereby insuring a failing data path is removed before an undesirable amount of errors occur, and possibly before any errors occur.
- FIG. 2 depicts an ELOS module 20 in accordance with an illustrative embodiment of the present invention.
- the ELOS module 20 is deployed at an NE 10 , 12 (not shown) and comprises a serial link 32 to a transceiver (e.g., an SFP 16 or 18 ) from which it receives the Rx level information, as well as the receive alarm signal level and warning signal level for that SFP, for example, among any other diagnostic data.
- a transceiver e.g., an SFP 16 or 18
- the ELOS module 20 is configured with an Rx Level Alarm Monitor function 22 that analyzes the Rx level information (e.g., using the above-described stored margins relating to optical input power) to determine if conditions or thresholds are met and, if so, generate an Rx Low signal 24 that triggers a Loss of Signal (LOS).
- Rx Level Alarm Monitor function 22 analyzes the Rx level information (e.g., using the above-described stored margins relating to optical input power) to determine if conditions or thresholds are met and, if so, generate an Rx Low signal 24 that triggers a Loss of Signal (LOS).
- the ELOS module 20 can store (1) a selected margin (dB) with respect to the alarm level of an SFP, which can be used to derive the Rx Low indication threshold at which the Rx Low signal 24 is generated or asserted by the ELOS module 20 ; and (2) a selected margin (dB) with respect to the warning level of the SFP, which can be used to derive the Recovery threshold (e.g., at which the Rx Low signal 24 is removed or de-asserted).
- the ELOS module 20 can assert and de-assert the Rx Low signal 24 at other thresholds or levels, or relative to other diagnostic levels used as a reference (e.g., Alarm, Warning, or both).
- the ELOS module 20 can assert an early or enhanced LOS in response to detected deterioration of the received optical power before the deterioration reaches the conditions required (e.g., 13 dB below Rx sensitivity) for a conventional LOS to be asserted.
- the ELOS module 20 can de-assert an early or enhanced LOS even if the received optical power is still below the RX sensitivity level.
- the Rx Low indication threshold and the Recovery threshold can be relative (e.g., above, below or at) to one or more diagnostic levels used as a reference(s), but are different from the conventional LOS and RX sensitivity levels, respectively.
- the Rx Level Alarm Monitor function 22 compares the Rx level received from the SFP (e.g., via the serial link 32 ) with the Rx Low indication threshold and, if the Rx level has been determined to have degraded to the Rx Low indication threshold, the Rx Level Alarm Monitor function 22 generates a “Rx Low” output indicated at 24 .
- the Rx Level Alarm Monitor function 22 employs logic (e.g., an OR gate 26 ) to generate a System LOS 30 whenever it receives an Rx Low output 24 (e.g., an enhanced LOS in accordance with illustrative embodiments of the present invention) or an SFP LOS 28 .
- the ELOS module 20 allows NEs 10 , 12 to use SFP diagnostics (e.g., Rx Level via link 32 ) and a Rx Low indication threshold that is higher than the LOS level designated by the corresponding SFP to generate an Rx Low output upon detection of signal degradation and/or condition(s) contributing to signal degradation that occurs earlier than conditions meeting the LOS threshold of the SFP.
- SFP diagnostics e.g., Rx Level via link 32
- Rx Low indication threshold that is higher than the LOS level designated by the corresponding SFP to generate an Rx Low output upon detection of signal degradation and/or condition(s) contributing to signal degradation that occurs earlier than conditions meeting the LOS threshold of the SFP.
- the NEs 10 , 12 can therefore perform earlier and possibly pre-emptive Ethernet path selection to minimize errors when an optical path degrades.
- the ELOS module 20 is provided as a set of program instructions and parameters to a programmed processor (e.g., a ColdFire® microprocessor) in a NE 10 , 12 such as an Ethernet switching system.
- the ELOS module 20 is able to receive an SFP LOS 34 , and receive and interpret diagnostic data from the SFP (e.g., Rx Level via link 32 ) and, depending on the Rx Level relative to the Rx Low indication threshold, generate or assert a LOS indication 30 independently of that received from the physical circuit (e.g., SFP LOS 34 ).
- the NE 10 , 12 receives a fault output 30 (e.g., System LOS) from the ELOS module 20 .
- the ELOS module 20 is able to receive and interpret diagnostic data from the SFP (e.g., Rx Level via link 32 ) and, depending on the Rx Level relative to the Recovery threshold, de-assert the LOS indication 30 .
- the ELOS module 20 can also be configured, for example, as part of the programmed control of an Ethernet switch IC or be a separate electronic component that operates in conjunction with the Ethernet switch IC.
- the ELOS module 20 can also be configured as program code and parameters stored on a computer-readable memory accessed by the NE. Whatever the configuration, the ELOS module 20 operates in conjunction with a transceiver and NE 10 , 12 to monitor Rx level information and LOS from the transceiver and generate an indication of an alarm or fault condition that is derived from a Rx level when that Rx level meets the Rx Low indication threshold or when a SFP LOS 34 is received which can, in turn, result in the NE 10 , 12 commencing path selection operations such as switch protection.
- a processor can be a processor of an NE 10 , 12 programmed in accordance with the ELOS module 20 , or a separate processing device operating in conjunction with the NE processor.
- the above-described margins for deriving the Rx Low indication and Recovery thresholds for a given SFP can be designated by a user (block 50 ), such as by user-settable parameters on a Ethernet switch operating with an ELOS module 20 , or pre-configured in a memory associated with the ELOS module 20 .
- the processor receives an Rx level from the transceiver 16 , 18 (e.g., via the serial link 32 ), as indicated at 52 in FIG. 3 .
- the processor can derive the Rx Low indication and Recovery thresholds and compare the received Rx level to them.
- an Rx Low output 24 (e.g., an enhanced LOS in accordance with illustrative embodiments of the present invention) is generated as indicated at 60 .
- the processor continues monitor Rx level information received via the serial link 32 (e.g., if the Rx Low indication threshold is not met, as indicated by the negative branch of block 58 , and after an Rx Low output 24 is generated as indicated at 62 ).
- the Rx Low output 24 is removed or terminated as indicated at 66 .
- the Recovery threshold e.g., a selected margin (dB) below Rx sensitivity level such as at the Warning level for the SFP
- the Rx level can be continuously or periodically monitored. Further, the condition determination can be done essentially continuously or periodically at designated intervals. Further, it is to be understood that the margin for the Rx Low indication threshold can be selected such that the Rx Low indication threshold is an Rx level at some value other than the SFP Alarm level. Similarly, the margin for the Recovery threshold can be selected such that the Recovery threshold is an Rx level at some value other than the SFP Warning level and above the Rx Low indication threshold. As stated above, the margin can be a positive value, a negative value or zero, such that the parameter is above, below or at a designated level (e.g., a diagnostic level) for the SFP, and that different SFP diagnostic levels can be used as reference levels with respect to the margin.
- a designated level e.g., a diagnostic level
- the NE 10 , 12 with ELOS module 20 benefits from the diagnostic functionality of a small form factor pluggable (SFP) module or other transceiver that can provide a received optical signal level, which is a more valuable metric than BER for evaluating optical path degradation.
- SFP small form factor pluggable
- the use of an enhanced designated low level (e.g., as derived by a selected margin with respect to an alarm level of an SFP) by the ELOS module 20 to force an earlier LOS 30 allows earlier path degradation detection, earlier indication of LOS and therefore earlier switch protection to minimize errors due to optical path degradation.
- the ELOS module 20 can be provided to each of a near end NE 10 and a far end NE 12 that support at least two aggregated links (e.g., indicated generally at 14 ) to allow switching to one link when the other link is indicating signal degradation.
- the NE 10 , 12 can be, for example, Carrier Ethernet units such as cards (e.g., a SuperG card available from Pulse Communications, Inc., Herndon, Va.) or Network Interface Devices (NIDs).
- the advantages of the ELOS module are not limited to link aggregation.
- the system 8 can be part of a service provider network and may represent a single communication service provider or multiple communications services providers.
- the service provider network can be, for example, a metro Ethernet network utilizing any number of topologies and including various nodes, entities, switches, servers, UNIs, CPE devices, NIDs, and other communication elements. Communications within the service provider network may occur on any number of networks which may include wireless networks, data or packet networks, cable networks, satellite networks, private networks, publicly switched telephone networks (PSTN), or other types of communication networks.
- PSTN publicly switched telephone networks
- the service provider's network is understood to be an infrastructure for sending and receiving data, messages, packets, and signals according to one or more designated formats, standards, and protocols.
- the service provider may perform testing and management for a connection or link between the data network 8 and NE 10 , 12 .
- the service provider may perform testing as implemented through the SFP transceiver 16 , 18 or other conventional transceiver (e.g., XFP, QSFP, and so on) coupled to a NE.
- the service provider may measure frame loss, discarded traffic, throughput, and other traffic information between the transceiver, the NE and the link 14 .
- the NE 10 , 12 and/or ELOS module 20 may include any number of computing and telecommunications components, devices, or elements which may include busses, motherboards, circuits, ports, interfaces, cards, connections, converters, adapters, transceivers, displays, antennas, and other similar components.
- Illustrative embodiments of the present invention can be implemented, at least in part, in digital electronic circuitry, analog electronic circuitry, or in computer hardware, firmware, software, or in combinations of them.
- the components of the ELOS module 20 can be implemented as a computer program product, i.e., a computer program tangibly embodied in an information carrier, e.g., in a machine-readable storage device or in a propagated signal, for execution by, or to control the operation of, data processing apparatus, e.g., a programmable processor, a computer, or multiple computers.
- a computer program can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment.
- a computer program can be deployed to be executed on one computer or on multiple computers at one site or distributed across multiple sites and interconnected by a communication network.
- the present invention can also be embodied as computer-readable codes on a computer-readable recording medium.
- the computer-readable recording medium is any data storage device that can store data which can thereafter be read by a computer system. Examples of the computer-readable recording medium include, but are not limited to, read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, and optical data storage devices.
- ROM read-only memory
- RAM random-access memory
- CD-ROMs compact discs, digital versatile discs, digital versatile discs, and Blu-rays, and Blu-rays, etc.
- the computer-readable recording medium can also be distributed over network-coupled computer systems so that the computer-readable code is stored and executed in a distributed fashion.
- Method steps, processes or operations associated with an ELOS module 20 can be performed by one or more programmable processors executing a computer program to perform functions of the invention by operating on input data and generating an output. Method steps can also be performed by, and an apparatus according to illustrative embodiments of the present invention, can be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit).
- FPGA field programmable gate array
- ASIC application-specific integrated circuit
- processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer.
- a processor will receive instructions and data from a read-only memory or a random access memory or both.
- the essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data.
- a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical disks, or optical disks.
- Information carriers suitable for embodying computer program instructions and data include all forms of non-volatile memory, including by way of example, semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks.
- semiconductor memory devices e.g., EPROM, EEPROM, and flash memory devices
- magnetic disks e.g., internal hard disks or removable disks
- magneto-optical disks e.g., CD-ROM and DVD-ROM disks.
- the processor and the memory can be supplemented by, or incorporated in special purpose logic circuitry.
Abstract
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US15/049,607 US20160173197A1 (en) | 2013-03-14 | 2016-02-22 | Methods and apparatuses for improved ethernet path selection using optical levels |
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Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US9939597B2 (en) * | 2015-04-10 | 2018-04-10 | Embrionix Design Inc. | Standardized hot-pluggable transceiving unit with a chipset mechanically anchored and electrically connected to a board |
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Citations (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4893002A (en) * | 1986-12-22 | 1990-01-09 | Ag Communications Systems Corporation | Loss of optical input circuit |
US5185736A (en) | 1989-05-12 | 1993-02-09 | Alcatel Na Network Systems Corp. | Synchronous optical transmission system |
US5265096A (en) * | 1991-07-03 | 1993-11-23 | Transwitch Corporation | Sonet alarm indication signal transmission method and apparatus |
US6064501A (en) | 1996-03-28 | 2000-05-16 | Nortel Networks Corporation | Method of determining optical amplifier failures |
US6178025B1 (en) * | 1997-12-03 | 2001-01-23 | Nortel Networks Limited | Optical network loss-of-signal detection |
US6222668B1 (en) * | 1998-05-08 | 2001-04-24 | Nortel Networks Limited | Fast loss of signal (LOS) detection for bidirectional optical amplifiers |
US20020092972A1 (en) * | 2001-01-16 | 2002-07-18 | International Business Machines Corporation | Transimpedance amplifier with an in-situ optical power meter |
US20020149810A1 (en) * | 2001-02-09 | 2002-10-17 | International Business Machines Corporation | Laser safety method for DC coupled parallel optical link |
US6483806B1 (en) * | 1998-11-25 | 2002-11-19 | The Whitaker Corporation | Signal detect circuitry for a passive GBIC module |
US20030095303A1 (en) * | 2001-11-16 | 2003-05-22 | Cunningham David G. | Open fiber control for optical transceivers |
US6623185B1 (en) * | 2000-06-16 | 2003-09-23 | Lucent Technologies Inc. | Loss of signal detector for low-level optical signals |
US20040008996A1 (en) * | 2001-02-05 | 2004-01-15 | Aronson Lewis B. | Optical transceiver module with power integrated circuit |
US20040022543A1 (en) * | 2001-02-05 | 2004-02-05 | Hosking Stephen G. | Optoelectronic transceiver having dual access to onboard diagnostics |
US20040022544A1 (en) | 2002-08-02 | 2004-02-05 | Dan Case | Transceiver with programmable signal parameters |
US20040136421A1 (en) * | 2003-01-10 | 2004-07-15 | Robinson Michael A. | Loss of signal detection and programmable behavior after error detection |
US20050089027A1 (en) | 2002-06-18 | 2005-04-28 | Colton John R. | Intelligent optical data switching system |
US20050111845A1 (en) * | 2002-06-25 | 2005-05-26 | Stephen Nelson | Apparatus, system and methods for modifying operating characteristics of optoelectronic devices |
US6915076B1 (en) * | 2001-05-14 | 2005-07-05 | Ciena Corporation | System and method for adaptively selecting a signal threshold of an optical link |
US20060018664A1 (en) * | 2001-09-17 | 2006-01-26 | Levinson Frank H | Optoelectronic device capable of participating in in-band traffic |
US20060110157A1 (en) * | 2004-11-22 | 2006-05-25 | Infineon Technologies North America Corp. | Transceiver with interrupt unit |
US7058310B2 (en) | 2001-02-05 | 2006-06-06 | Finisar Corporation | System and method for protecting eye safety during operation of a fiber optic transceiver |
US20060147162A1 (en) * | 2004-12-30 | 2006-07-06 | Ekkizogloy Luke M | Microcode-driven programmable receive power levels in an optical transceiver |
US20060159460A1 (en) * | 2004-12-30 | 2006-07-20 | Stewart James W | Programmable loss of signal detect hardware and method |
US20060215545A1 (en) * | 2005-03-22 | 2006-09-28 | Nelson Stephen T | Controlling loss of signal thresholds in an optical receiver |
US20060269283A1 (en) * | 2005-05-16 | 2006-11-30 | Hirotake Iwadate | Optical transceiver with function for monitoring operating and ambient conditions |
US20070031153A1 (en) * | 2002-06-25 | 2007-02-08 | Finisar Corporation | Transceiver module and integrated circuit with dual eye openers |
US20070104494A1 (en) * | 2005-11-07 | 2007-05-10 | Sumitomo Electric Industries, Ltd. | Opitcal receiver reliably detectable loss-of-signal state |
US20070140688A1 (en) * | 2005-12-21 | 2007-06-21 | Nortel Networks Limited | Method and apparatus for detecting a fault on an optical fiber |
US20070147835A1 (en) | 2005-12-26 | 2007-06-28 | Samsung Electronics Co., Ltd | Device and method for controlling optical transmitters in WDM-PON system |
US20070201867A1 (en) * | 2006-02-28 | 2007-08-30 | Tellabs Petaluma, Inc. | Method, apparatus, system and computer program product for identifying failing or failed optical network terminal(s) on an optical distribution network |
US20070280684A1 (en) * | 2005-02-08 | 2007-12-06 | Fujitsu Limited | Loss-of-signal detecting device |
US7308006B1 (en) | 2000-02-11 | 2007-12-11 | Lucent Technologies Inc. | Propagation and detection of faults in a multiplexed communication system |
US20080049621A1 (en) | 2004-12-31 | 2008-02-28 | Mcguire Alan | Connection-Oriented Communications Scheme For Connection-Less Communications Traffic |
US7349450B2 (en) * | 2002-08-12 | 2008-03-25 | Broadcom Corporation | Multi-stage high speed bit stream demultiplexer chip set having switchable master/slave relationship |
US7463674B2 (en) | 2003-04-09 | 2008-12-09 | Avago Technologies Fiber Ip (Singapore) Pte. Ltd. | Tables for determining the signal strength of a received signal in a fibre optics transceiver |
US7532820B2 (en) | 2004-10-29 | 2009-05-12 | Finisar Corporation | Systems and methods for providing diagnostic information using EDC transceivers |
JP2009225338A (en) | 2008-03-18 | 2009-10-01 | Oki Electric Ind Co Ltd | Point-to-multipoint optical communication system |
US20090269076A1 (en) | 2008-04-29 | 2009-10-29 | Qingzhong Cai | Systems and methods for optical receiver decision threshold optimization |
US20090304396A1 (en) * | 2008-06-04 | 2009-12-10 | Masaaki Furukawa | Optical Receiver and Method of Detecting Loss of Optical Signal of the Optical Receiver |
US20100014858A1 (en) | 2008-07-15 | 2010-01-21 | Giovanni Barbarossa | Reduction Of Packet Loss Through Optical Layer Protection |
US20100150567A1 (en) * | 2008-12-15 | 2010-06-17 | Mitsubishi Electric Corporation | Optical transceiver |
US20100215359A1 (en) * | 2009-02-22 | 2010-08-26 | Wen Li | Smart optical transceiver having integrated optical dying gasp function |
US7794157B2 (en) | 2007-07-11 | 2010-09-14 | Emcore Corporation | Wireless tuning and reconfiguration of network units including optoelectronic components |
US20110170861A1 (en) | 2008-09-24 | 2011-07-14 | Huawei Technologies Co., Ltd. | Method and device for adjusting transmission of transport network data |
US8059959B2 (en) * | 2007-03-19 | 2011-11-15 | Fujitsu Limited | Loss-of-light detecting apparatus |
US20120014260A1 (en) | 2009-03-31 | 2012-01-19 | Naoki Enomoto | Communication device in communication network and communication control method |
US20120051362A1 (en) | 2004-01-20 | 2012-03-01 | Nortel Networks Limited | Metro ethernet service enhancements |
US8248954B2 (en) | 2009-08-31 | 2012-08-21 | Hubbell Incorporated | System and method for enhancement of Ethernet link loss forwarding |
US20120263457A1 (en) * | 2009-12-24 | 2012-10-18 | Uri Mahlab | Technique for monitoring optical networks |
US8412051B2 (en) * | 2006-10-13 | 2013-04-02 | Menara Networks, Inc. | 40G/100G optical transceivers with integrated framing and forward error correction |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10350628B4 (en) * | 2003-10-29 | 2017-12-14 | Texas Instruments Deutschland Gmbh | Integrated signal loss detection with large threshold range and precise hysteresis |
-
2013
- 2013-10-02 US US14/044,044 patent/US9270368B2/en not_active Expired - Fee Related
-
2014
- 2014-03-11 WO PCT/US2014/023726 patent/WO2014159451A2/en active Application Filing
-
2016
- 2016-02-22 US US15/049,607 patent/US20160173197A1/en not_active Abandoned
Patent Citations (56)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4893002A (en) * | 1986-12-22 | 1990-01-09 | Ag Communications Systems Corporation | Loss of optical input circuit |
US5185736A (en) | 1989-05-12 | 1993-02-09 | Alcatel Na Network Systems Corp. | Synchronous optical transmission system |
US5265096A (en) * | 1991-07-03 | 1993-11-23 | Transwitch Corporation | Sonet alarm indication signal transmission method and apparatus |
US6064501A (en) | 1996-03-28 | 2000-05-16 | Nortel Networks Corporation | Method of determining optical amplifier failures |
US6178025B1 (en) * | 1997-12-03 | 2001-01-23 | Nortel Networks Limited | Optical network loss-of-signal detection |
US6222668B1 (en) * | 1998-05-08 | 2001-04-24 | Nortel Networks Limited | Fast loss of signal (LOS) detection for bidirectional optical amplifiers |
US6483806B1 (en) * | 1998-11-25 | 2002-11-19 | The Whitaker Corporation | Signal detect circuitry for a passive GBIC module |
US7308006B1 (en) | 2000-02-11 | 2007-12-11 | Lucent Technologies Inc. | Propagation and detection of faults in a multiplexed communication system |
US6623185B1 (en) * | 2000-06-16 | 2003-09-23 | Lucent Technologies Inc. | Loss of signal detector for low-level optical signals |
US20020092972A1 (en) * | 2001-01-16 | 2002-07-18 | International Business Machines Corporation | Transimpedance amplifier with an in-situ optical power meter |
US7502564B2 (en) | 2001-02-05 | 2009-03-10 | Finisar Corporation | Integrated memory mapped controller circuit for fiber optics transceiver |
US7058310B2 (en) | 2001-02-05 | 2006-06-06 | Finisar Corporation | System and method for protecting eye safety during operation of a fiber optic transceiver |
US20040008996A1 (en) * | 2001-02-05 | 2004-01-15 | Aronson Lewis B. | Optical transceiver module with power integrated circuit |
US20040022543A1 (en) * | 2001-02-05 | 2004-02-05 | Hosking Stephen G. | Optoelectronic transceiver having dual access to onboard diagnostics |
US8086100B2 (en) | 2001-02-05 | 2011-12-27 | Finisar Corporation | Optoelectronic transceiver with digital diagnostics |
US20120093504A1 (en) | 2001-02-05 | 2012-04-19 | Aronson Lewis B | Optoelectronic Transceiver with Multiple Flag Values for a Respective Operating Condition |
US7184668B2 (en) | 2001-02-05 | 2007-02-27 | Finisar Corporation | System and method for protecting eye safety during operation of a fiber optic transceiver |
US7079775B2 (en) | 2001-02-05 | 2006-07-18 | Finisar Corporation | Integrated memory mapped controller circuit for fiber optics transceiver |
US20020149810A1 (en) * | 2001-02-09 | 2002-10-17 | International Business Machines Corporation | Laser safety method for DC coupled parallel optical link |
US6915076B1 (en) * | 2001-05-14 | 2005-07-05 | Ciena Corporation | System and method for adaptively selecting a signal threshold of an optical link |
US20060018664A1 (en) * | 2001-09-17 | 2006-01-26 | Levinson Frank H | Optoelectronic device capable of participating in in-band traffic |
US20030095303A1 (en) * | 2001-11-16 | 2003-05-22 | Cunningham David G. | Open fiber control for optical transceivers |
US20050089027A1 (en) | 2002-06-18 | 2005-04-28 | Colton John R. | Intelligent optical data switching system |
US20070031153A1 (en) * | 2002-06-25 | 2007-02-08 | Finisar Corporation | Transceiver module and integrated circuit with dual eye openers |
US20050111845A1 (en) * | 2002-06-25 | 2005-05-26 | Stephen Nelson | Apparatus, system and methods for modifying operating characteristics of optoelectronic devices |
US7567758B2 (en) | 2002-06-25 | 2009-07-28 | Finisar Corporation | Transceiver module and integrated circuit with multi-rate eye openers and bypass |
US20040022544A1 (en) | 2002-08-02 | 2004-02-05 | Dan Case | Transceiver with programmable signal parameters |
US7349450B2 (en) * | 2002-08-12 | 2008-03-25 | Broadcom Corporation | Multi-stage high speed bit stream demultiplexer chip set having switchable master/slave relationship |
US20040136421A1 (en) * | 2003-01-10 | 2004-07-15 | Robinson Michael A. | Loss of signal detection and programmable behavior after error detection |
US7463674B2 (en) | 2003-04-09 | 2008-12-09 | Avago Technologies Fiber Ip (Singapore) Pte. Ltd. | Tables for determining the signal strength of a received signal in a fibre optics transceiver |
US20120051362A1 (en) | 2004-01-20 | 2012-03-01 | Nortel Networks Limited | Metro ethernet service enhancements |
US7532820B2 (en) | 2004-10-29 | 2009-05-12 | Finisar Corporation | Systems and methods for providing diagnostic information using EDC transceivers |
US20060110157A1 (en) * | 2004-11-22 | 2006-05-25 | Infineon Technologies North America Corp. | Transceiver with interrupt unit |
US20060159460A1 (en) * | 2004-12-30 | 2006-07-20 | Stewart James W | Programmable loss of signal detect hardware and method |
US20060147162A1 (en) * | 2004-12-30 | 2006-07-06 | Ekkizogloy Luke M | Microcode-driven programmable receive power levels in an optical transceiver |
US20080049621A1 (en) | 2004-12-31 | 2008-02-28 | Mcguire Alan | Connection-Oriented Communications Scheme For Connection-Less Communications Traffic |
US20070280684A1 (en) * | 2005-02-08 | 2007-12-06 | Fujitsu Limited | Loss-of-signal detecting device |
US20060215545A1 (en) * | 2005-03-22 | 2006-09-28 | Nelson Stephen T | Controlling loss of signal thresholds in an optical receiver |
US20060269283A1 (en) * | 2005-05-16 | 2006-11-30 | Hirotake Iwadate | Optical transceiver with function for monitoring operating and ambient conditions |
US20070104494A1 (en) * | 2005-11-07 | 2007-05-10 | Sumitomo Electric Industries, Ltd. | Opitcal receiver reliably detectable loss-of-signal state |
US20070140688A1 (en) * | 2005-12-21 | 2007-06-21 | Nortel Networks Limited | Method and apparatus for detecting a fault on an optical fiber |
US20070147835A1 (en) | 2005-12-26 | 2007-06-28 | Samsung Electronics Co., Ltd | Device and method for controlling optical transmitters in WDM-PON system |
US20070201867A1 (en) * | 2006-02-28 | 2007-08-30 | Tellabs Petaluma, Inc. | Method, apparatus, system and computer program product for identifying failing or failed optical network terminal(s) on an optical distribution network |
US8412051B2 (en) * | 2006-10-13 | 2013-04-02 | Menara Networks, Inc. | 40G/100G optical transceivers with integrated framing and forward error correction |
US8059959B2 (en) * | 2007-03-19 | 2011-11-15 | Fujitsu Limited | Loss-of-light detecting apparatus |
US7794157B2 (en) | 2007-07-11 | 2010-09-14 | Emcore Corporation | Wireless tuning and reconfiguration of network units including optoelectronic components |
JP2009225338A (en) | 2008-03-18 | 2009-10-01 | Oki Electric Ind Co Ltd | Point-to-multipoint optical communication system |
US20090269076A1 (en) | 2008-04-29 | 2009-10-29 | Qingzhong Cai | Systems and methods for optical receiver decision threshold optimization |
US20090304396A1 (en) * | 2008-06-04 | 2009-12-10 | Masaaki Furukawa | Optical Receiver and Method of Detecting Loss of Optical Signal of the Optical Receiver |
US20100014858A1 (en) | 2008-07-15 | 2010-01-21 | Giovanni Barbarossa | Reduction Of Packet Loss Through Optical Layer Protection |
US20110170861A1 (en) | 2008-09-24 | 2011-07-14 | Huawei Technologies Co., Ltd. | Method and device for adjusting transmission of transport network data |
US20100150567A1 (en) * | 2008-12-15 | 2010-06-17 | Mitsubishi Electric Corporation | Optical transceiver |
US20100215359A1 (en) * | 2009-02-22 | 2010-08-26 | Wen Li | Smart optical transceiver having integrated optical dying gasp function |
US20120014260A1 (en) | 2009-03-31 | 2012-01-19 | Naoki Enomoto | Communication device in communication network and communication control method |
US8248954B2 (en) | 2009-08-31 | 2012-08-21 | Hubbell Incorporated | System and method for enhancement of Ethernet link loss forwarding |
US20120263457A1 (en) * | 2009-12-24 | 2012-10-18 | Uri Mahlab | Technique for monitoring optical networks |
Also Published As
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US20160173197A1 (en) | 2016-06-16 |
WO2014159451A2 (en) | 2014-10-02 |
US20140270755A1 (en) | 2014-09-18 |
WO2014159451A3 (en) | 2015-10-29 |
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