System and method for realizing electrical layer linear protection in POTN

Abstract

The invention relates to a system and method for realizing electrical layer linear protection in POTN, relating to the POTN field. A business mapping unit of a source end converts ODUk channel data into a group of cells through cell segmentation, a multicast ID is distributed, the cells are subjected to concurrence or selection at work and protection light channel units through a cell switching unit, and after the cells are received by the work and protection light channel units, the cells are selectively activated and are sent to the corresponding cell reception ports; after the work and protection light channel units of a destination end receive signals, the de-mapping and de-multiplexing of ODUk is completed, the cells are sent out via the corresponding channels, a system cross is established to point to the business mapping unit; and the signal failure, signal deterioration, and APS overhead information are detected, an APS control unit notifies the current needed light channel units to activate the cross and non-needed light channel units to block the cross. The ODUk electrical layer linear protection is realized under the unified cell exchange configuration of POTN, and the high effectiveness and the reliability are guaranteed.

Description

technical field [0001] The invention relates to the field of POTN (Packetenhanced Optical Transport Network, packet-enhanced optical transport network), in particular to a system and method for realizing electrical layer linear protection in POTN. Background technique [0002] Traditional OTN (Optical Transport Network, Optical Transport Network) equipment generally completes ODUk (including ODU0 / 1 / 2 / 2e / 3 / 4) scheduling based on time-division and space-division cross-connect units. On this basis, the ODUk electrical layer linear protection required by the OTN network uses the cross-connect unit to control time-division and space-division cross-connection to achieve concurrent or selective transmission and reception. [0003] The new-generation POTN is a packet-enhanced OTN device. In order to realize the unified scheduling of ODUk and packet services, the cell switching core is used to replace the traditional time-division and space-division crossover. The switching principl...

AI Technical Summary

Problems solved by technology

[0004] The original centralized switching architecture implements APS (Automatic Protection Switch, automatic protection switching) through the pure cross-connection unit control cross-connection mode. With the centralized processing method, the switching actions of multiple services need to be executed sequentially, which affects the switching time

However, the unified cell switching architecture of POTN is a distributed switching architecture, and in this switching architecture, the above method is no longer applicable

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