The New Generation Carrier Network…
Adding intelligence to carrier networks With the introduction of the concept of Generalized Multiprotocol Label Wwitching (GMPLS), today’s network control system has also incurred a huge evolution, changing from the traditional centralized TMN or SNMP system to a more general distributed control system. GMPLS technique is versatile enough to support almost all the network layers using a common set of network control protocols. The techniques are mainly realized based on a generalized concept called generalized label, which is modelled to cover various types of capacity unit ranging from a single MPLS label, to a SDH/SONET time, to a wavelength, to a wavelength band, or even to an entire fibre. Such a generalized technique also makes the network control so easy to allow different network layers to communicate with each other so as to achieve better network capacity utilization and serve some traffic engineering purpose. Moreover, the GMPLS control technique brings much intelligence to today’s networks, which are mainly reflected in the aspects such as crossing-layer traffic engineering, crossing-layer network recovery, etc. In addition, the distribution of the network control system also enables the control system more robust to survive the failure of a bottleneck central controller in the old day's control system. Summary In contrast to the past voice-oriented network implementation, today’s networks can efficiently support IP services while providing a huge amount of capacity in the most scalable and flexible way. They are also much intelligent to handle end-to-end service provisioning, quality of service, and network failure recovery.Pages: 1 2 3 [4] 5
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