Title :
Demand assigned capacity management (DACM) in IP over optical (IPO) networks
Author :
Awduche, Daniel O. ; Jabbari, Bijan
Author_Institution :
Verizon Bus., Ashburn, VA
Abstract :
The demand assigned capacity management (DACM) problem in IP over optical (IPO) network aims at devising efficient bandwidth replenishment schedules from the optical domain conditioned upon traffic evolution processes in the IP domain. A replenishment schedule specifies the location, sizing, and sequencing of link capacity expansions to support the growth of Internet traffic demand in the IP network subject to economic considerations. A major distinction in the approach presented in this paper is the focus of attention on the economics of "excess bandwidth" in the IP domain, which can be viewed as an inventory system that is endowed with fixed and variable costs and depletes with increase in IP traffic demand requiring replenishment from the optical domain. We develop mathematical models to address the DACM problem in IPO networks based on a class of inventory management replenishment methods. We apply the technique to IPO networks that implement capacity adaptive routing in the IP domain and networks without capacity adaptive routing. We analyze the performance characteristics under both scenarios, in terms of minimizing cumulative replenishment cost over an interval of time. For the non-capacity adaptive routing scenario, we consider a shortest path approach in the IP domain, specifically OSPF. For the capacity adaptive scenario, we use an online constraint-based routing scheme. This study represents an application of integrated traffic engineering which concerns collaborative decision making targeted towards network performance improvement that takes into consideration traffic demands, control capabilities, and network assets at different levels in the network hierarchy
Keywords :
IP networks; Internet; bandwidth allocation; capacity management (computers); decision making; inventory management; optical fibre networks; telecommunication network routing; telecommunication traffic; DACM; IP over optical networks; IPO; Internet traffic demand; bandwidth replenishment schedules; capacity adaptive routing; collaborative decision making; cumulative replenishment; demand assigned capacity management; excess bandwidth economics; integrated traffic engineering; inventory management replenishment methods; inventory system; link capacity expansions; mathematical models; online constraint-based routing scheme; time interval; traffic evolution processes; Bandwidth; Communication system traffic control; Costs; IP networks; Inventory management; Mathematical model; Optical fiber networks; Routing; Telecommunication traffic; Traffic control; ASON; GMPLS; IP over optical networks; IPO; MPLS; bandwidth replenishment; capacity management; demand assigned capacity management; integrated traffic engineering; inventory management; network performance optimization; traffic engineering;
Journal_Title :
Networking, IEEE/ACM Transactions on
DOI :
10.1109/TNET.2006.879700