Abstract: A method and device for transmitting data are disclosed, the method comprising: mapping the data to an ODUS, and mapping the ODUS into an OTUS, wherein the rate of the ODUS and the OTUS are M*100 Gb/s, M is a positive integer greater than or equal to 2, and the tributary slot size of the ODUS and the OTUS are 100 Gb/s; distributing the OTUS into M groups of electric channel signals, wherein each group of electric channel signals corresponds to N electric layer channels, N is a positive integer; and mapping all the data distributed into the electric channel signals by the OTUS into the same OChS for transmission, wherein the rate of the OChS is M*100 Gb/s, the M groups of electric channel signals are carried by a single frequency sequence or multiple non-continuous frequency sequences, each frequency sequence carries m groups of electric channel signals, 1?m?M, m is an integer. The disclosure improves optical fibber utilization efficiency as well as system flexibility and compatibility.

Abstract: A channel establishment method and device are provided. The method includes: establishing a media channel between a first node and a second node; establishing a signal channel between a third node and a fourth node after the media channel is established, the signal channel passes a frequency slot matrix of one or more intermediate nodes between the third node and the fourth node and a traffic engineering link between any two nodes; and allocating frequency spectrum to the signal channel from available frequency spectrum of the traffic engineering link, wherein the frequency spectrum allocated includes multiple split 50 GHz frequency spectrums which bear one optical channel and each of which only includes single optical carrier. The solution addresses the problem of how to effectively plan and manage frequency spectrum for an introduced flexible grid technology, improves waveband spectrum efficiency and achieves the compatibility to 50 GHz transmission technology of existing DWDM systems.

Abstract: A method for establishing an end-to-end service is provided in the present invention, which includes: acquiring link information in a network and multi-stage multiplexing capability constraint information supported by gateway network elements; when an end-to-end path computation request is received, according to the link information and the multi-stage multiplexing capability constraint information, performing an end-to-end routing computation to acquire an end-to-end routing, and selecting a multi-stage multiplexing capability used on a gateway network element passed by the end-to-end routing; and configuring the end-to-end service, and configuring the selected multi-stage multiplexing capability on the gateway network element passed by the end-to-end routing. A system for establishing the end-to-end service, an optical transport network and a signal transmission method thereof are also provided in the present invention, which can all implement the interconnection between new networks and old networks.

Abstract: A route control method is disclosed in the present document. The method includes: a path computing apparatus acquiring a latency value of each node and a latency value of a link between each node and each adjacent node thereof; and when receiving a route computing request, according to each latency value acquired, the path computing apparatus computing an end-to-end path satisfying a latency requirement of a service corresponding to the route computing request. A path computing apparatus and a route control system are also disclosed in the present document. With the present document, a route control computed by the latency provides a solution for a latency Service Level Agreement (SLA) of operators.

Abstract: A channel establishment method and device are provided. The method includes: establishing a media channel between a first node and a second node, wherein the first node is the source node of the media channel, the second node is the destination node of the media channel, and the media channel passes the frequency slot matrix of the one or more intermediate nodes between the first node and the second node and the optical fiber between any two nodes; and allocating frequency spectrum to the media channel from the available frequency spectrum of the optical fiber, wherein the media channel supports at least one single signal frequency slot. The solution can address the problem of how to effectively plan and manage frequency spectrum for an introduced flexible grid technology.

Abstract: A signaling control method for service establishment based on G.709 is provided in the present invention, including: a control plane obtaining routing information of an end-to-end service to be established, information of a gateway network element passed by end-to-end service routing and a multi stage multiplexing capability selected for the gateway network element, initiating an end-to-end connection establishment process, and sending an end-to-end connection establishment signaling to nodes passed by the end-to-end service routing, wherein, the end-to-end connection establishment signaling contains the multi stage multiplexing capability selected for the gateway network element passed by the end-to-end service routing, and a corresponding multi stage multiplexing capability is configured on the gateway network element. A signaling control system for service establishment based on G.709 is also provided in the present invention.

Abstract: A method for controlling area boundary, and a method and system for establishing connection in a multilayer network are provided. With a Path Computation Element (PCE) computing a network path and sending response message carrying layer boundary information to a Path Computation Client (PCC), in the present invention, a multilayer network connection can be established rapidly, thereby reducing the time for establishing the multilayer network connection.

Abstract: A G.709 based multi-stage multiplexing routing control method and a gateway network element. The method comprises: a gateway network element broadcasting multi-stage multiplexing capability of the gateway network element to a routing domain where the gateway network element is located or a path calculation entity through an extended routing protocol, so as to implement multi-stage multiplexing configuration and management of an optical transport network through the gateway network element; the multi-stage multiplexing capability comprises information of multiplexing hierarchy supported by a port of a link connected to the gateway network element and adaptation ability.

Abstract: A signaling control method for service establishment based on G.709 is provided in the present invention, including: a control plane obtaining routing information of an end-to-end service to be established, information of a gateway network element passed by end-to-end service routing and a multi stage multiplexing capability selected for the gateway network element, initiating an end-to-end connection establishment process, and sending an end-to-end connection establishment signaling to nodes passed by the end-to-end service routing, wherein, the end-to-end connection establishment signaling contains the multi stage multiplexing capability selected for the gateway network element passed by the end-to-end service routing, and a corresponding multi stage multiplexing capability is configured on the gateway network element. A signaling control system for service establishment based on G.709 is also provided in the present invention.

Abstract: A route control method is disclosed in the present document. The method includes: a path computing apparatus acquiring a latency value of each node and a latency value of a link between each node and each adjacent node thereof; and when receiving a route computing request, according to each latency value acquired, the path computing apparatus computing an end-to-end path satisfying a latency requirement of a service corresponding to the route computing request. A path computing apparatus and a route control system are also disclosed in the present document. With the present document, a route control computed by the latency provides a solution for a latency Service Level Agreement (SLA) of operators.

Abstract: A G.709 based multi-stage multiplexing routing control method is provided in the present invention, which includes that: the multi-stage multiplexing capability of the gateway network element is carried in a link state advertisement data packet, and the multi-stage multiplexing capability of the gateway network element is advertised to a routing domain in which the gateway network element is located or a path computation entity through a routing protocol. A gateway network element is also provided in the present invention, the gateway network element is configured to: carry the multi-stage multiplexing capability of the gateway network element in the link state advertisement data packet, and advertise the multi-stage multiplexing capability of the gateway network element to the routing domain in which the gateway network element is located or the path computation entity through the routing protocol. With the above G.

Abstract: A method for establishing an end-to-end service is provided in the present invention, which includes: acquiring link information in a network and multi-stage multiplexing capability constraint information supported by gateway network elements; when an end-to-end path computation request is received, according to the link information and the multi-stage multiplexing capability constraint information, performing an end-to-end routing computation to acquire an end-to-end routing, and selecting a multi-stage multiplexing capability used on a gateway network element passed by the end-to-end routing; and configuring the end-to-end service, and configuring the selected multi-stage multiplexing capability on the gateway network element passed by the end-to-end routing. A system for establishing the end-to-end service, an optical transport network and a signal transmission method thereof are also provided in the present invention, which can all implement the interconnection between new networks and old networks.

Abstract: A method for controlling area boundary, and a method and system for establishing connection in a multilayer network are provided. With a Path Computation Element (PCE) computing a network path and sending response message carrying layer boundary information to a Path Computation Client (PCC), in the present invention, a multilayer network connection can be established rapidly, thereby reducing the time for establishing the multilayer network connection.