ATM VP-based economical transport network architecture for multi-reliability and broadband integrated service infrastructure

The ATM virtual path (VP)-based transport network is a candidate for the future multi-reliability and broadband integrated service infrastructure. This paper compares the performance attributes of the VP transport network with those of the conventional SDH network and future optical path-based transport network. This paper shows that the VP-based network is superior in terms of path-grooming efficiency and connection capability, and will still play an important role when WDM technologies are introduced to carrier networks. This paper also describes the recently fabricated VP cross connect (VP-XC) system configuration and the VP automatic protection switching (APS) performance of the XC.