Disclosed are an apparatus and testing methods for performing testing operations over multiple types of links and through multiple potential points of failure to segment sources of problems, which may relate to reported or actual instances of service disruption in a network communication environment. The apparatus may perform service layer testing directly via an optical link, in addition to via Ethernet service layer testing. The apparatus may further conduct tests on other layers as well, including the physical layer, the network layer, and the link layer. To facilitate efficient testing, the apparatus may integrate programmable workflow profiles that specify tests to be conducted, and may interface with a cloud platform for sharing results of the tests, providing end-to-end testing of various components and types of links (whether optical or electrical, including wired and wireless links). Results of the tests may provide guidance to resolve detected problems.

Aspects of the subject disclosure may include, for example, receiving a first optical signal from a first optical network via a first port of the wavelength converter, receiving a second optical signal from a second optical network via a second port of the wavelength converter, modulating the first optical signal with the second light signal to generate a third optical signal, eliminating the first light signal from the third optical signal to generate a fourth optical signal, and transmitting the fourth optical signal through the second optical network. The first optical signal can include a first digital signal modulated onto a first light signal of a first wavelength, the second optical signal can include a second light signal can include a second wavelength different from the first wavelength, and the fourth optical signal can include the first digital signal modulated onto the second light signal. Other embodiments are disclosed.

This application discloses a bandwidth allocation method, an optical line terminal (OLT), an optical network unit (ONU), and a system, where the method includes receiving a bandwidth request from each ONU, where the ONU includes an ONU1, generating a bandwidth map (BWMap) message according to bandwidth requested by the ONU and bandwidth configured for the ONU, where the BWMap message includes a first allocation identifier (Alloc-ID1), a first time corresponding to the Alloc-ID1, a second allocation identifier (Alloc-ID2), and a second time corresponding to the Alloc-ID2, and both the Alloc-ID1 and the Alloc-ID2 are allocated to the ONU1 for use, and sending the BWMap message to each ONU. Therefore, a problem that a transmission delay does not satisfy a requirement when a passive optical network (PON) system is applied to mobile backhaul is resolved, a data transmission rate and data transmission efficiency are improved, and user satisfaction is improved.

A data transmission method includes an optical line terminal (OLT) for obtaining a data template. The OLT then obtains corresponding optical network terminal (ONT) data based on one or more data types defined in the data template. The OLT then encodes the ONT data according to an external data representation (XDR) format and sends encoded ONT data to a management server. Further, the management server stores and manages the ONT data. The OLT collects the corresponding ONT data based on the data template, encodes and reports the ONT data according to the uniform XDR format. The embodiments define a unified statistics collecting and reporting manner of ONT data and uses standardly defined ONT data to help the management server store and manage the ONT data.

The present disclosure relates to information transmission methods in a passive optical network (PON) system. One example method includes sending, by an optical line terminal (OLT), a first power range and time indication to an unregistered optical network unit (ONU), where the first power range and the time indication indicate the ONU to send a serial number of the ONU to the OLT at a time indicated by the time indication in case a downlink receive power of the ONU is within the first power range, and receiving, by the OLT, the serial number of the ONU.

An optical routing system for free space optical communication is disclosed. The system has a transmitter and a receiver that use free space optical communication, and includes an optical path based on waveguide where an optical signal is routed from the proximity of the transmitter to the proximity of the destination. This system has advantages in terms of mitigating line-of-sight issues, as well as potentially reducing the overall coupling loss that would be otherwise incurred due to beam divergence of free space propagation for long distance.

An optical apparatus includes a front optics section and a spectrometer section. The front optics section includes a spot de-multiplexer configured to receive a plurality of multi-mode optical signals each having a plurality of modal components, and to output in a linear array of a corresponding plurality of optical beams for each multimode optical signal. The spectrometer section includes a wavelength steering element configured to separate each of the optical beams into a plurality of wavelength channels. A fiber steering element is configured to steer the wavelength channels between the optical beams.

A service switching system and a service switching method, where the system includes at least two service processing subracks and at least one optical cross-connect subrack. Each service processing subrack is connected to each optical cross-connect subrack using an optical fiber. Each service processing subrack is configured to perform service switching for an externally inputted service data electrical signal, and then convert it into an optical signal, and send to one or more optical cross-connect subracks, or vice versa. Each optical cross-connect subrack is configured to receive a service data optical signal from one or more service processing subracks and perform optical cross-connection for the service data optical signal, and then output the service data optical signal to the one or more service processing subracks, which reduce interconnection costs of the service switching system.

The system includes an optical line terminal, a cloud server and an optical network terminal, wherein, the optical line terminal includes a part of management entities supported by the OMCI protocol, the part of management entities is associated with device information of the optical line terminal, the cloud server supports virtual OMCI, and the cloud server includes another part of management entities supported by the OMCI protocol. According to the scheme of the disclosure, by retaining a part of MEs supported by the OMCI protocol which is associated with the device information of OLT in OLT, and deploying another part of MEs supported by the OMCI protocol in the cloud server, it can reduce or avoid the dependency of the vOMCI on the OLT device while the vOMCI is realized to reduce the complexity of the OLT device and improve the flexibility of deploying the OMCI protocol stack of different service providers.

A transmission method and system for an optical burst transport network are disclosed in the present document. The method includes: acquiring a topology of a mesh OBTN network, and generating one or more logical sub-networks according to the topology of the mesh OBTN network; a predetermined master node in the mesh OBTN network updating bandwidth maps for all logical sub-networks; the predetermined master node is a node, which all control channels pass through, in all the nodes of the mesh OBTN network.