Abstract
With the recent prevalence of Internet protocol-based services, packet traffic is rapidly becoming the
mainstream of data traffic. This has increased the demand for transport network technology that can efficiently
accommodate the large capacity of both packet-based and circuit-based traffic while achieving high reliability,
sufficient operation, and maintenance capability comparable to that of traditional transport networks such as
synchronous digital hierarchy or optical transport networks. This study gives an overview of packet transport
technologies including Ethernet and multiprotocol label switching (MPLS), and provides details of MPLS-TP (transport
profile), recently developed as a promising next-generation packet transport technology. Its standardization in
International Telecommunication Union, Telecommunication Standardization Sector and Internet Engineering Task Force is
also described. Then, further perspectives are given on MPLS-TP applications including layer convergence of transport
networks for cost-effective and simple operation.
© 2013 IEEE
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