Method and device for hybrid access and transmission of packet switching and optical transport network services

Abstract

The present invention provides a mixed access and sending method and device for packet switching and optical transport network services, through which the received packet switching service data is mapped into an ODUflex data frame structure without a fixed rate by the mixed service receiving module, or Map the received optical transport network service data to the corresponding optical channel data unit ODUk data frame structure; cross-schedule the ODUflex data frame or ODUk data frame mapped by the mixed service receiving module to the corresponding optical transport network interface module by the cross-connect module; The optical transport network interface module maps the received ODUflex data frame or ODUk data frame into an optical transport network data frame meeting the first preset requirement, and sends the mapped optical transport network data frame. Therefore, in the same device, the mixed input and transmission of the packet switching service and the optical transport network service can be realized, so the cost of networking and maintenance of the network using the packet switching technology and the optical transport network technology can be reduced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for mixed access and transmission of packet switching and optical transport network services. Background technique [0002] Optical Transport Network (OTN: Optical Transport Network), based on Wavelength Division Multiplexing (WDM: Wavelength Division Multiplexing) technology, organizes the transport network at the optical layer. It is the next-generation backbone transport network with large-capacity cross-connect configuration The characteristics of transmission provide mapping and transparent transmission of various service signals, provide large-grained service scheduling and multiple protection recovery modes, provide perfect performance and fault detection capabilities, and have flexible multiple networking methods, electrical layer and optical At present, OTN technology is the first choice for bottom layer transmission. [0003] However, with th...

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Problems solved by technology

[0005] However, the existing PTN+OTN networking technology requires both OTN equipment and PTN equipment, such as figure 1 Indicated by the dotted line ( figure 1 Among them, NE is a network element and WDM is a wavelength division multiplexing device), which requires a large number of optical fiber connections and requires separate management of two sets of networks, which not only increases the complexity of networking and maintenance, but also increases the operating costs of operators.

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