A kind of wireless ATM air interface cell format was defined, and a cell protection field at transmissionconvergence sub layer of wireless physical layer was designed.
定义了一种无线at M空中接口信元格式，设计了无线at M物理层中传输会聚子层信元保护域。
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The Metro Ethernet Forum (MEF) put forward the concept of Carrier Ethernet (ce) to improve Ethernet technology and make it a transmissionconvergence layer solution for Next Generation Network (NGN).
Packet transport network (PTN) is a convergence network of SDH and IP. Under the background of full services operation, this technology represents the development trend of transmission network.