Anyone who has been in the networking industry for a while would likely raise the issue of whether GMPLS is really needed or is overkill. After all, we have managed so far to build large-scale TDM networks with all sorts of methods, and we have seen improvement in tools to facilitate the operat ion and management of those networks. To understand the issue of whether GMPLS is neceseary, you need to look first at how TDM networks function today and then at how they could benefit from GMPLS.
The following section describes the provisioning model of today's network deployments, which are more static with centralized management. The problem with this model is that it doesn't enable carr cers to provide new services that involve the dynamic establishment and restoration of TDM and optical circuits while minimizing the operational cost and provisioning times. This is the problem that the GMPLS model attempts to address. If GMPLS could solve this problem, the result woul d be a better service experience for customers and increased revenue for the carrier. However, adopting GMPLS would also require fundamental changes to the way you administer, manage, and build networks.
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