61 results about "Alarm indication signal" patented technology

Connectivity fault notification is provided by generating an alarm indication signal at a device that is logically adjacent to the fault, and forwarding the alarm indication signal upward through various levels to at least one client level entity. The alarm indication signal may be suppressed at any level for a service instance if service is restored at that level, or if a protection path prevents disruption of the service instance at that level, or auto-suppressed at an originating node based on number of times transmitted or elapsed time. The alarm indication signal may include a point of failure indicator such as the MAC address of the device that generates the alarm indication signal, or a failed resource identity such as an IEEE 802.1AB LLDP MAC Service Access Point (“MSAP”). Further, the alarm indication signal may be employed to trigger use of the protection path.

The invention provides a vehicle control method and device based on a BSG motor and belongs to the field of automobile electronic control. The vehicle control method and device based on the BSG motoris used in an engine controller. The vehicle control method based on the BSG motor comprises the steps of receiving current vehicle information collected in real time, wherein the current vehicle information comprises a current engine state, a current gear, a current vehicle speed, a current first battery capacity, a current second battery capacity, a current BSG motor mode, a current acceleratorpedal opening, a current brake pedal opening and a current coolant temperature; according to the current vehicle information, determining a control strategy; according to the control strategy, transmitting a corresponding control signal; according to the current vehicle information, the control strategy and the corresponding control signal, judging the current fault mode; and according to the current fault mode, transmitting a corresponding alarm indication signal to an instrument panel. Therefore, the vehicle control strategy with 48-volt weak mixing system is integrated in the engine controller so that the vehicle is controlled by at a low cost on the basis of the BSG motor.

A system and method for forwarding fault information in an optical network is disclosed. Responsive to a fault being detected at a node, the fault information is forwarded to the destination node in the form of a loss-of-signal condition by turning off laser transmitters used to propagate the signal towards its destination. Thus, a node or other network element not capable of generating an alarm signal consistent with an established alarm signaling protocol, such as a SONET alarm indication signal (AIS) or an SDH multiplexer section alarm indication signal MS-AIS, may still forward the fault condition to a downstream element.

Provided is a method for propagating a maintenance signal that can notify an Ethernet layer as well as a VPWS, which is a multi-protocol label switching (MPLS) layer, that a defect has occurred when the defect occurs in a virtual private wire service (VPWS) network using synchronous digital hierarchy (SDH) / synchronous optical network (SONET) as a physical layer. The method includes the steps of: when a physical defect signal is detected from a physical layer, generating a physical layer alarm indication signal (AIS) and a physical layer remote defect indication (RDI) signal, and transmitting the physical layer RDI signal to a neighbor node in the backward direction of traffic; when the physical layer AIS is detected, generating and transmitting, at an MPLS layer, an MPLS backward defect indication (BDI) signal indicating a backward defect to an ingress node, and generating and transmitting, at an Ethernet layer, an Ethernet AIS to an Ethernet subscriber device connected to an egress node; and generating and transmitting, at the Ethernet subscriber device receiving the Ethernet AIS, an RDI signal indicating a backward Ethernet flow defect to an Ethernet subscriber device connected to the ingress node.

The embodiment of the invention discloses a protecting method for service transmission, comprising the following steps: alarm indication signals containing protective indicating identification is obtained and the protective indicating identification shows the protective state of a channel; the protective state of the channel in which faults occur is determined according to the obtained protectiveindicating identification; and if the protective state of the channel is determined to be that protection is not available, protection switching is carried out. The embodiment of the invention provides network equipment, which comprises an obtaining unit, an identification unit and a first processing unit; the obtaining unit is used for obtaining alarm indication signals containing protective indicating identification and the protective indicating identification shows the protective state of a channel; the identification unit is used for determining the protective state of the channel in which faults occur according to the obtained protective indicating identification; and the first processing unit is used for carrying out protection switching when the identification unit determines that the protective state of the channel is no available protection. The technical proposal of the embodiment of the invention can reduce service loss in the protection switching.

In an OTN (Optical Transport Network), an OTN interface of a network element may receive a BDI (Backwards Defect Indicator) signal from a far end network element to which OTN frames are being transmitted. A BDI signal indicates the occurrence of a unidirectional failure in the transmission of OTN frames to which the far end network element responds by switching its routing to the network element. The OTN interface generates an AIS (Alarm Indication Signal) for its network element so that the network element switches network communication channels to the far end network element to ensure bidirectional switching upon a unidirectional failure.

The invention relates to a channel protection method of a ring network, particularly to a channel protection method of a PTN forward compatible MSTP ring network system. When a ring network link goes wrong, facilities at both ends of a fault point respectively transmit AIS alarm indication signals to downstream facilities, the facilities receiving the AIS alarm indication signals then sequentially transparently transmit the signals to the downstream facilities, the AIS alarm indication signals are transmitted in the direction from an MSTP facility to a PTN facility at the joint of the PTN facility and the MSTP facility, the AIS channel alarm indication signals are inserted into a TMC layer of an NNI interface of the PTN facility, the AIS alarm indication signals are transmitted in the direction from the PTN facility to the MSTP facility, the AIS alarm indication signals of the TMC layer are inserted into a service channel of the MSTP facility, and a service initiating facility and a service finishing facility carry out concurrent selective receiving according to the received AIS alarm indication signals. The method provided by the invention effectively ensures the realization of channel protection when the PTN facility carries out forward compatibility for the MSTP facility.

A method of detecting signal degrade in an ATM network, and a network element using such method are disclosed. Signal degrade at the ATM layer of the network is detected by monitoring signal degrade at the physical layer of the network. In response, ATM cells indicative of the signal degrade may be generated at the ATM layer, and protection switching may be effected. Preferably, signal degrade at the physical layer may be monitored by determining a bit-error-rate at the physical layer. ATM alarm indication signal (“AIS”) cells or ATM protection switching coordination protocol (“CP”) cells may be generated to effect the protection switching.

The embodiment of the invention provides a method, a device and a system for precisely locating a fault position under a multi-protocol label switching environment. The method comprises the steps of: when a communication fault occurs, receiving an alarm indication signal (AIS) sent by a lower network server layer, by an upper network client layer, wherein the AIS carries the location information of a fault point; and acquiring the location information of the fault point by the client layer according to the received AIS. By means of the method, the client layer can immediately acquire the specific location of the fault point so as to rapidly locate the fault and increase operation and maintenance efficiency.

The invention discloses an alarm device of a hydraulic brake system and an alarm method. The alarm device comprises a pressure detector, a pressure data processor and an alarm, wherein the pressure detector is used for detecting the pressure loss of a pipeline of the hydraulic brake system; the pressure data processor is used for comparing the pressure loss which is detected by the pressure detector with the preset safe value, when the loss is larger than the safe value, the alarm indication signal is output; and the alarm is used for alarming in an indication way according to the alarm indication signal. Through detecting the pressure loss of the pipeline of the hydraulic brake system and comparing the pressure loss with the safe value, the hydraulic brake system is judged whether brake liquid seepage or leakage and other faults exist, the delayed alarm problem that the alarm only works when the liquid level descends to a certain scale limit in the prior art is solved, so a driver can judge the fault position within the shortest time, and the safety factor of braking for the integral vehicle is improved.

An optical wavelength division coupler 11 wavelength-divides a wavelength multiplexed light to respective wavelength lights each of which is dropped to an optical gate switch 15-i (i=1˜n) and a light receiver 13-i by an optical coupler 12-i and supplied to an optical light fault monitor 14 through the light receiver 13-i. When the optical signal deterioration monitor 14 detects an optical loss of wavelength (OLOW), an optical loss of signal (OLOS) or an optical signal degrade (OSD) in wavelength lights processed by the optical coupler 12-i as a fault detection signal in an optical layer, a controller 19 controls the optical gate switch 15-i to cut off wavelength light passing therethrough and sends an optical alarm indication signal (AIS-O) to a downstream side. Therefore, when a loss of signal is detected by the light receiver 13-i, the optical signal deterioration monitor 14 can know the alarm indication signal (AIS) from the upstream side, removing the necessity of special hardware therefor.

The invention provides an imaging case chip, an imaging case, and an alarming treatment method of recording material remaining quantity. The imaging case chip includes an information storage unit, a delay alarming unit and a simulation sensor, wherein the information storage unit is used for sending an alarming indication signal to the delay alarming unit when the recording material remaining quantity is lower than a pre-arranged threshold value; the delay alarming unit is used for prolonging the effective time of the alarming indication signal, and the effective time of the alarming indication signal is longer than the power supply interval time of the imaging device to the information storage unit and the simulation sensor; and the simulation sensor is used for issuing alarming information when the alarming indication signal kept on the delay alarming unit is detected, or issuing recording material sufficient information when the alarming indication signal kept on the delay alarming unit is not detected. The invention can solve the problem that as the power supply time of the imaging device to the information storage unit and the simulation sensor of the imaging case chip is asynchronous, the imaging case chip cannot provide alarming information accurately.

An embodiment of the invention discloses a controlling method for a WiFi protected setup and equipment thereof, which are used for ensuring high safety in accessing the WPS. The controlling method for the WiFi protected setup according to an embodiment of the invention comprises the steps of: acquiring a WPS accessing request of first user equipment, wherein the WPS accessing request carries a personal identification number PIN; according to the WPS accessing request, outputting an alarm indication signal to second user equipment so that the second user equipment transmits a first instruction or a second instruction according to the alarm indication signal; if the first instruction which is transmitted by the second user equipment is acquired, receiving the WPS accessing request and stopping the alarm indication signal; and if the second instruction which is transmitted by the second user equipment is acquired, refusing the WPS accessing request and stopping the alarm indication signal.

The invention provides a three-phase alternating voltage phase sequence monitoring system, including: a step-down filtering and shaping circuit; a comparator circuit which compares a three-phase alternating voltage processed by the step-down filtering and shaping circuit with a reference voltage and outputs a three-channel comparison result; a logic circuit which detects a phase sequence of the three-phase alternating voltage according to the three-channel comparison result and outputs a judgment signal; a driving protection circuit which drives a relay according to the judgment signal; and a relay which generates an indication signal according to an output signal of the driving protection circuit, outputs a phase sequence correct indication signal when the phase sequence of the three-phase alternating voltage is correct, and outputs an alarm indication signal when the phase sequence of the three-phase alternating voltage is in disorder or a phase loss occurs. The three-phase alternating voltage phase sequence monitoring system provided by the invention detects the phase sequence of the three-phase alternating voltage, thereby driving the relay, and protecting safety of electric equipment, and effectively avoiding unnecessary loss brought by the problems of phase sequence disorder and phase loss; and at the same time, since the three-phase alternating voltage phase sequence monitoring system is integrated in a circuit module of a chip, the system is small in size, and the system is convenient to operate and high in detection precision.

The invention provides a thermocouple welding detection device which comprises a signal selection circuit, a first comparison circuit, a second comparison circuit, a switching circuit and an alarm indication circuit. The signal selection circuit is electrically connected with a thermocouple. The signal selection circuit receives a selection signal and outputs a first direct current voltage to the first comparison circuit or outputs a second direct current voltage to the second comparison circuit according to the selection signal. The first comparison circuit compares the first direct current voltage with a first reference voltage and then outputs a first control signal. The second comparison circuit compares the second direct current voltage with a second reference voltage and then outputs a second control signal. The switching circuit receives the first control signal and the second control signal and outputs an alarm indication signal according to the first control signal and the second control signal. The alarm indication circuit receives the alarm indication signal and indicates the welding conditions of thermocouple wires of the thermocouple according to the alarm indication signal.

The invention relates to a system and a method for detecting reset signals of watchdogs. The system comprises a maximum register, a minimum register, a statistic module and an alarm indication module, wherein the statistic module detects and acquires the pulse width of a watchdog signal, and compares the pulse width with a maximum pulse width value and a minimum pulse width value; the alarm indication module sends out an alarm indication signal under the circumstance that the pulse width is more than the maximum pulse width value or less than the minimum pulse width value. The method comprises the following steps of acquiring the pulse width in a watchdog reset signal, comparing the pulse width with the preset maximum pulse width value and the minimum pulse width, sending out the alarm indication signal under the circumstance that the pulse width is more than the maximum pulse width value or less than the minimum pulse width value. The method ensures that the system can detect the reset signals of all watchdogs, and greatly simplifies the operation of detecting the reset signals of all watchdogs.

A method for channel protection switching of an optical network device, an Optical Transport Network (OTN) device, and a Passive Optical Network (PON) device is provided. The method includes detecting, by the PON device, whether an OTN alarm indication signal is received after discovering a fault. If the OTN alarm indication signal is received, the alarm generated by the PON device is screened so that the PON device does not perform channel protection switching. The PON device detects whether an OTN alarm indication signal is received, and screens off the alarm generated by the PON device so that the PON does not generate futile alarms or lead to futile switching when the OTN fails but the PON works normally.

The present invention provides a light source for use in a fixed warning or indicating annunciator, such as a track annunciator. The light source has: a lighting device for emitting light to be output by the light source; circuitry associated with the lighting device; and communication circuitry for communicating information from the light source to an external monitoring system. The communication circuitry is configured to electrically isolate the lighting device and circuitry associated with the lighting device from an external monitoring system when the light source is in use. The external monitoring system can be a condition monitoring system.

A bidirectional line switched ring network which enables high-speed operation with improved reliability because of a reduced software processing load is disclosed, and the network includes a plurality of optical transmission equipment sets connected in a ring form, wherein optical transmission equipment provided in a node on the transmission side performs transmission to each lower-order channel by attaching a transmission-side node ID, and, optical transmission equipment provided in a node on the reception side collates the received transmission-side node ID with an expected value of the transmission-side node ID having been set in advance, and when the collation does not match, the optical transmission equipment in the node on the reception side prevents a misconnection in the event of a failure by inserting an alarm indication signal.

The invention discloses a method and device for transferring an error code status, belonging to the field of communications. The method and the device are used for solving the problem that the realization of error code status transfer is complex. The method for transferring error code status provided by the invention comprises the following steps of: detecting a continuity check (CC) / connectivity verification (CV) message; if no CC / CV message is detected, reporting a signal fail (SF) alarm message to the network side; when the CC / CV message is detected, further detecting a forward defect indication (FDI) message or an alarm indication signal (AIS) message; and determining whether to report a signal degradation (SD) alarm message according to the detection result of the FDI message or the AIS message. The method and the device provided by the invention are applicable to the field of communications and are used for transferring the error code status.

The invention provides a search and rescue transmitter with a distress type message transmitting function and a message transmitting method thereof. The search and rescue transmitter comprises a shell and a circuit board, wherein the circuit board is provided with an information processing module, a satellite navigation positioning device, an AIS (Alarm Indication Signal) transmitting module and an antenna thereof, wherein the search and rescue transmitter further comprises a distress type switch at least representing two different distress types; the input end of the information processing module is connected with the distress type switch; and the output end of the information processing module is connected with the AIS transmitting module and is used for transmitting an AIS message of adistress type selected by an operator. Due to the adoption of the search and rescue transmitter with the distress type message transmitting function and the message transmitting method thereof, provided by the invention, the function of transmitting an AIS message including the distress type can be realized reliably by setting the distress type switch and transmitting the distress type represented by the switch.

The invention provides a method and device for transmitting messages. An aggregated link trunk is set between a first device and a second device. A state machine of a maintenance association end point(MEP) of the first device is currently located on a first single board of the first device. The level of the MEP of the first device is different from that of the MEP of the second device. The methodcomprises the steps that when the state machine of the MEP of the first device is migrated from the first single board to a second single board of the first device, the first device suppresses faultalarm and sends an alarm indication signal (AIS) to the second device according to a preset frequency; and when the state machine of the MEP of the first device is migrated completely from the first single board to the second single board of the first device, the first device recovers the fault alarm and stops sending the AIS. The false alarm resulting from state machine migration timeout is effectively suppressed through utilization of the alarm indication signal (AIS). The method and the device are simple and feasible. Interconnection is not influenced.

The invention provides an AXI streaming data frame bus combining device, which relates to the technical field of digital communication and comprises a multi-stage register, a data indicator, a preparation signal generator, a multiplexer and a data transmission indicator; the multiplexer is used for acquiring a first indication signal and to-be-transmitted data sent by any one main device, and writing the acquired indication signal and the to-be-transmitted data into the multi-level register; the multi-level register is used for storing the first indication signal and the data to be transmittedsent by any master device, and sending the first indication signal and the data to be transmitted to the slave device; the data indicator is used for generating a second indication signal; the data transmission indicator is used for generating a third indication signal; and the preparation signal generator is used for generating preparation signals of the master devices and obtaining the preparation signals sent by the slave devices. The technical problem that an existing AXI streaming data frame bus combining device is low in efficiency when a plurality of master devices transmit data to slave devices is solved.

The invention discloses a method for preventing the defect transparent transmission of a section layer of synchronous digital hierarchy equipment, which relates to the technical field of synchronous digital transmission. The method comprises the following steps of: detecting a main service data frame of a service data interface, jointed with a crossing unit, on the optical interface unit system side of the synchronous digital hierarchy (SDH) equipment in real time, and judging the main service data frame gives an out of frame (OOF) alarm or not; when the main service data frame is judged to give the OOF alarm, inserting an administrative unit-alarm indication signal (AU-AIS) in the direction of the optical interface unit line side of the SDH equipment; and when the AU-AIS passes through the optical interface unit line side of the SDH equipment, performing scrambler processing and downwards transmitting the processed AU-AIS. By the method, clock abnormities can be prevented from causing the defects of error codes, alarm and the like of the section layer comprising a regenerator section and / or a multiplexing section at each downstream site, so the security of services of sites non-adjacent to a failing site is greatly improved.