Provided are a communication station, an optical communication system, a data transmission method, and a storage medium. The communication station is a first station including: a first reconfigurable optical add-drop multiplexing ROADM device, including a first port used to connect a cable in a first direction of a network; a second ROADM device connected to the first ROADM device and including a second port which may be used to connect a cable in a second direction of the network being different from the first direction; an optical protection device connected to each of the first and second ROADM devices and used to control the first station to transmit communication with a second station for a corresponding service in the first direction corresponding to the first ROADM device, or to transmit communication with the second station for a corresponding service in the second direction corresponding to the second ROADM device.

Methods and systems for adding optical signals, such as superchannels, to an optical transport network include using a spread tree wavelength allocation in order to reduce cross-phase modulation (XPM). The spread tree wavelength allocation may result in an overall reduction in operating costs for the optical transport network as compared to a first fit wavelength allocation, for example due to reduced equipment costs for a given level of network loading.

A line concentration optical communication device that communicates with a plurality of optical communication devices by free-space optical communication includes: an optical device control unit that controls an angle of a spatial optical device in each time slot on the basis of angle information and the time slot, the angle information being information indicating an angle at which each of the optical communication devices and the spatial optical device whose angle is controllable can communicate with each other, the time slot indicating a communicable time allocated to each of the optical communication devices; and an optical communication unit that performs communication with each of the optical communication devices via the spatial optical device.

The method includes a first encryption step of encrypting each of a plurality of data streams to obtain a respective encrypted data stream, a mapping step of mapping the plurality of encrypted data streams obtained in the first encryption step to a plurality of transmission streams for transmission via the optical transmission units, wherein the transmission streams and optical transmission units are in a one-to-one relationship, and wherein each transmission stream is mapped to by at least two of the plurality of encrypted data streams. The method further includes a second encryption step of encrypting each of the plurality of transmission streams to obtain a respective encrypted transmission stream, and a transmission step of transmitting each of the plurality of encrypted transmission streams obtained in the second encryption step via a respective optical transmission unit.

The present invention provides a fiber deployment method, storage medium, electronic device and system. The fiber deployment method includes the following steps: S10, traversing all single-mode fiber links and selecting a link for ultra-low loss fiber upgrade with the objective of minimizing the maximum number of frequency slots used in the whole network; and S20, when both an ultra-low loss fiber and a single-mode fiber satisfy the service demand, using preferentially spectrum resources in the single-mode fiber. The fiber deployment method of the present invention is simple and feasible. It allows a more efficient fiber upgrade strategy and more reasonable spectrum resource allocation and can make full use of the existing single-mode fibers in the elastic optical network, thereby allowing more efficient resource utilization.

A method includes receiving client data; extracting overhead data from the client data; mapping the client data into one or more frames, where each of the one or more frames has a frame payload section and a frame overhead section, where the client data is mapped into the one or more frames; inserting the overhead data into the frame overhead section of the one or more frames; transporting the one or more frames across a network by generating a plurality of optical subcarriers carrying the one or more frames; extracting the overhead data from the frame overhead section of the one or more frames; recovering the client data from the one or more frames; inserting the extracted overhead data into the recovered client data to create modified client data; and outputting the modified client data.

A device may receive optical network information associated with a first optical node and a second optical node. The first optical node may be associated with a first group of optical devices. The second optical node may be associated with a second group of optical devices. The device may identify a first mapping in which a first group of optical channels is associated with the first group of optical devices and a second mapping in which a second group of optical channels is associated with the second group of optical devices. The first group of optical channels may correspond to the first group of payloads, and the second group of optical channels may correspond to the second group of payloads. The device may provide information depicting the first mapping and information depicting the second mapping.

Systems and methods for optimization of spectrum sharing in optical line systems include, for at least one fiber having optical spectrum being shared by at least two users in an optical line system, assigning value to the optical spectrum; determining using a policy and the assigned value of the optical spectrum how to partition the optical spectrum between the at least two users; and causing implementation of the partition of the optical spectrum. The assigned value of the optical spectrum can be based on information carrying capacity in bandwidth per second. The assigned value of the optical spectrum accounts for performance versus frequency, such that, e.g., two or more of the at least two users have different amounts of the optical spectrum from one another.

In some implementations, a device may map active channels within a band spectrum into a first balanced tree data structure wherein each node of the first balanced tree data structure represents a respective channel. The device may identify spectrum gaps within the band spectrum based on the nodes of the first balanced tree data structure and mapping the spectrum gaps into a second balanced tree data structure wherein each node of the second balanced tree data structure represents a respective spectrum gap. The device may update the first balanced tree data structure and the second balanced tree data structure in response to a change detected in an active channel by adding, deleting, or modifying the nodes of the first and second balanced tree data structures to reflect the change in real-time occupancy of the band spectrum.

A plurality of optical signals are arranged on optical frequency grids having a frequency spacing of f, a wavelength multiplexing optical signal includes at least one specific arrangement signal group, and the specific arrangement signal group includes Q S signal(s) and R P signal(s), where Q is an integer of 1 or more and R is an integer of 1 or more. A frequency difference between any pair of S signals included in the specific arrangement signal group is different from frequency differences between all of other pairs of S signals and frequency differences between all pairs of P signals, and a frequency difference between any pair of P signals included in the specific arrangement signal group is different from frequency differences between all pairs of S signals and frequency differences between all of other pairs of P signals.