Huawei Technologies Co., Limited

Jianlin Zhou

Kun Li

Min Yan

Tao Cai

Shimin Zou

Xing Hu

Yang Cao

Zhiyun Chen

Shiyi Cao

Min Ye

Jun Cai

Yi Zhang

Xiaogeng Xu

Juan Chen

Songping Wang

Sheng Jin

Kin Li

Haosi Ran

A method, an apparatus, and a system for transmitting information in a passive optical network are provided. The method mainly includes: obtaining OAM information that an RE device needs to report to an OLT device, performing modulation processing, according to the OAM information, on a downlink optical signal sent by the OLT device, and returning the downlink optical signal after the modulation processing to the OLT device; or, obtaining OAM information that an OLT device needs to deliver to an RE device, performing modulation processing, according to the OAM information, on a downlink optical signal sent by the OLT device to the RE device, and sending the downlink optical signal after the modulation processing to the RE device.

Method, apparatus, and system for transmitting information in passive optical network

Embodiments of the present disclosure disclose a method for controlling data stream switch and a relevant equipment. The method includes: obtaining bandwidth demand information of a data stream; calculating a BWM according to the bandwidth demand information, the physical bandwidth of at least one ingress port and at least one egress port of the data stream, and TDM service bandwidth information; performing sequencing on entries of the BWM, to obtain a bandwidth sequencing information table; performing cell even sequencing processing on the data stream according to the bandwidth sequencing information table, to obtain a cell table; and controlling, sending of cells of the data stream according to the cell table. Through the solutions provided, processing complexity may be effectively reduced, the problem of scale limitation on a bufferless switch structure is solved, and meanwhile, a delay jitter during switch processing is also decreased.

Method for controlling data stream switch and relevant equipment

A method and an apparatus for transmitting multiple services are provided, and which belong to the field of optical transmission technologies. The method includes: receiving bandwidth information of TCONTs of all nodes; dividing a payload area of a GTH frame into a preset number n of arrays, where each array includes a specified number of timeslots and the interval between any two neighboring timeslots in each array is n and n is a natural number; calculating, according to the bandwidth information of the TCONTs of all the nodes, timeslot positions of arrays occupied by the TCONTs of each node in the payload area; interleaving, according to the timeslot positions of the arrays occupied by the TCONTs of a local node in the payload area, the TCONTs of the local node into corresponding timeslots starting from a specified frame, obtaining a GTH frame, and transmitting the GTH frame.

Method and apparatus for transmitting multiple services

The information transfer method includes: determining an indicator of a start bit in a protection time slot or a preamble time slot of a laser, and establishing a communication channel according to the indicator of the start bit; inserting Operation Administration and Maintenance (OAM) information of a Long Reach-Passive Optical Network (LR-PON) device into an upstream frame sent to an Optical Line Terminal (OLT) device by the LR-PON device at a position indicated by the indicator of the start bit, and transporting the upstream frame to the OLT device through the communication channel. Therefore, OAM functions of the LR-PON device are extended, so that the OAM information can be transported by the LR-PON device independently, and OAM characteristics of the LR-PON device are enhanced. For example, PON protection is better supported, and the speed and success ratio of protection switching of a PON system are increased.

Information transfer and receiving method, system, and device

A method and an apparatus for multi-service adaptation and carriage, comprising: mapping at the service adaptation layer different types of services into uniform enhanced Gigabit Passive Optical Network Encapsulation Method (E-GEM) frames; combining at the channel layer E-GEM frames encapsulating the same type of services into the same type of T-CONT frames; setting a priority for each type of T-CONT; guaranteeing bandwidth for T-CONT frames with high priority and preferentially sending it.

Method and apparatus for multi-service adaptation and carriage

A Passive Optical Network (PON) multicast management method includes: an Optical Line Terminal (OLT) performs multicast control according to multicast control information, and generates a corresponding multicast downstream command; the OLT sends the multicast downstream command to an Optical Network Unit (ONU); and the ONU resolves the multicast downstream command, and performs multicast control according to the multicast downstream command. Accordingly, a PON multicast communication system, an OLT, and an ONU are disclosed. Through the multicast control mechanism introduced into the PON system, the PON multicast functions are enhanced, and the same data destined for multiple ONUs is prevented from being sent repeatedly in the network, and thus the network bandwidth resources are saved.

PON multicast communication system, multicast management method, and corresponding devices

In the field of optical network communication technologies, a method, a device, and a system for transmitting a constant rate data stream are provided. The method for transmitting the constant rate data stream by the first network device includes: receiving a constant rate data stream; calculating an input rate of the constant rate data stream or a rate difference between the input rate and a standard rate of the constant rate data stream in each cycle of a reference clock; encapsulating the constant rate data stream into a Gigabit-Passive Optical Network (GPON) Encapsulation Method (GEM) frame by using a bit as a minimum encapsulation unit; and encapsulating the GEM frame into a GPON Transmission Convergence Layer (GTC) frame, and sending the GTC frame to the second network device through a GPON network. Therefore, the technical solutions may be widely applied to the GPON network.

Method, device, and system for transmitting constant rate data stream

A method, system and device for protecting a Long Reach Passive Optical Network (LR-PON) system are provided. The Electrical Relay (E-R) device receives the optical signal transmitted on two fiber transmission paths by the Optical Line Terminal (OLT) or Optical Network Unit (ONU) on one side, performs optical-to-electrical (O/E) conversion, signal regeneration, and electrical-to-optical (E/O) conversion for the optical signal, and sends the signal to the ONU or the OLT on the other side through the two fiber transmission paths. Through backup of the fiber transmission path, an LR-PON system protection method is provided to improve the reliability of the LR-PON system. The method, system, and device for protecting the LR-PON system under the present invention all support and are compatible with the existing functions of all devices in the existing LR-PON system.

Method, system and device for protecting long-reach passive optical network

A method, system and apparatus for managing alarms in a Long Reach Passive Optical Network (LR-PON) system are disclosed. The method includes: obtaining a PON signal from an Optical Line Terminal (OLT) or an Optical Network Unit (ONU) on one side; checking whether the obtained PON signal fails; and notifying the ONU or the OLT on the other side if the PON signal fails. The method, system and apparatus under the present invention monitor the LR-PON transmission quality and process various alarm indications raised in the LR-PON signal monitoring.

Method, system, and apparatus for managing alarms in long-reach passive optical network system

A method, a device, and a system for realizing data transmission extension in a passive optical network (PON) are provided. Between a burst-mode clock and data recovery (BCDR) module and an electrical-optical (E/O) amplification module, the device includes a delimiter matching module and a preamble buffering and compensating module. The delimiter matching module is adapted to receive a data frame sent by the BCDR module and determine a location of a delimiter in the data frame. An optical-electrical (O/E) amplification module performs O/E conversion, amplification, and shaping on the data frame. The BCDR module then performs clock and data recovery processing on the data frame. The preamble buffering and compensating module is adapted to receive and buffer the data frame output from the delimiter matching module, insert a compensation preamble in the data frame according to the location of the delimiter in the data frame determined by the delimiter matching module, and send the data frame to the E/O amplification module according to a retiming clock of a downstream direction. Therefore, the data transmission extension is realized in an optical-electrical-optical (OEO) manner.

Method, system and device for realizing data transmission extension in passive optical network

Two devices for preventing internal combustion of equipment from spreading outwards includes a sampling circuit, a detecting and monitoring circuit, and a low-voltage datum power supply. The sampling circuit includes two thermal detectors. The detecting and monitoring circuit includes a first monitoring output end and a second monitoring output end. When two thermal detectors are both normal, the first monitoring output is inactive and the second monitoring output is inactive. When one of the thermal detectors is abnormal, the first monitoring output is inactive and the second monitoring output is active. When the two thermal detectors are both abnormal, the first monitoring output is active and the second monitoring output is active. The first monitoring output is configured to turn off the power supply of a fan and the second monitoring output is configured to drive an alarm unit.

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Shenzhen, China

Jianlin Zhou