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在电信业务IP化趋势推动下,SDH传输网技术已不能很好地支撑数据IP业务的传送需求,基于OTN的智能光网络技术陆续得到广泛的开发与研究。然而,在现实中,传统的基于SDH多业务传送平台MSTP技术的传送网依然大量存在。SDH以其可靠的传送承载能力、灵活的分插复用技术、强大的保护恢复功能,特别在一些专网用户中,仍然有一定的生命力。对SDH传输的保护方式作了大体的综述与探讨。
Driven by the trend of telecom service IP, SDH transmission network technology can not support the transmission requirements of data IP services well. The OTN-based intelligent optical network technologies have been widely developed and researched. However, in reality, the traditional transport network based on MSTP technology of SDH multi-service delivery platform still exists in large numbers. SDH with its reliable transmission carrying capacity, flexible add-drop multiplex technology, powerful protection and recovery capabilities, especially in some private network users, there is still some vitality. The protection mode of SDH transmission is generally reviewed and discussed.