Layer 1 virtual private networks: service concepts, architecture requirements, and related advances in standardization
T. Takeda, I. Inoue, R. Aubin, Marco Carugi · IEEE Communications Magazine · 2004
This article describes service concepts, service requirements, and high-level network architecture requirements for layer 1 virtual private network service. It takes in consideration progress achieved in standardization, mainly inside ITU-T SG 13, which has been very active in this area.