Path processing method, optical communication device and optical communication system for optical network

A processing method and optical network technology, which is applied in the field of optical communication, can solve problems such as unfixed bandwidth, inability to realize associated ODUflex calculations, and inability to determine associated ODUflex connection paths, etc.

Active Publication Date: 2011-04-20
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The bandwidth of the ODUflex signal type is not fixed, and can be used to carry client signals of various granularities. However, in the current existing technolo...

Method used

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  • Path processing method, optical communication device and optical communication system for optical network
  • Path processing method, optical communication device and optical communication system for optical network
  • Path processing method, optical communication device and optical communication system for optical network

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Embodiment 2

[0058] Embodiment 2 also has the beneficial effects of Embodiment 1, that is, the PCE obtains network topology information through the notification message sent by the node, and the network topology information includes parameters indicating the link type and total service bandwidth of the link, and indicating the remaining parameters of the link. Bandwidth parameters and parameters indicating whether the link supports ODUflex services, and the request message carries flow parameters for establishing a service connection, and the flow parameters include the signal type of the optical channel data unit ODUflex with flexible bandwidth, ODUflex service bandwidth; then, according to the traffic parameters in the request message and the network topology information collected by the PCE, the PCE determines the link in the network that supports the ODUflex service and has sufficient time slot resources for the requested ODUflex service, and according to the link The path calculation o...

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Abstract

The invention discloses a path processing method, an optical communication device and an optical communication system for an optical network. The method comprises the following steps that: a path computation element (PCE) acquires network topology information, wherein the network topology information comprises a parameter which indicates the link type and the total service bandwidth of a link, a parameter which indicates the residual bandwidth of the link and a parameter which indicates whether the link supports an optical channel data unit flexible (ODUflex) service or not; the PCE acquires a request message sent by a node, wherein the request message carries a flow parameter for establishing service connection and the flow parameter comprises the signal type of the ODUflex of an opticalchannel data unit (ODU) of which the signal type is a flexible bandwidth, and the service bandwidth of the ODUflex; and the PCE determines a link which supports the ODUflex service and meets a time slot resource needed by the ODUflex service in the network according to the flow parameter and the network topology information in the request message and determines a path which supports the ODUflex service according to the determined link. A path which is associated with ODUflex connection can be determined.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a path processing method in an optical network, an optical communication device and an optical communication system. Background technique [0002] Optical Transport Network (OTN, Optical Transport Network) technology is a new optical transport technology, which can realize flexible scheduling and management of large-capacity services, and has become the mainstream technology of the backbone transport network. [0003] Three signal types are defined in the existing OTN: Optical Channel Data Unit 1 (ODU1, OpticalChannel Data Unit 1), ODU2, and ODU3, which respectively include 1, 4, and 16 time slots, and the time slot types are 2.5Gb / s, and has a fixed bandwidth. Using the control plane technology, the automatic establishment of connections with different granularities in the network can be realized. In an existing network, generally, a centralized Path Computation ...

Claims

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Application Information

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IPC IPC(8): H04Q11/00H04B10/20H04L45/125H04B10/27
Inventor 资小兵林毅
Owner HUAWEI TECH CO LTD
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