Refine
Year of publication
Document Type
- ZIB-Report (12)
- Article (10)
- In Proceedings (5)
- Other (2)
- Doctoral Thesis (1)
- In Collection (1)
Is part of the Bibliography
- no (31)
Keywords
- integer programming (2)
- telecommunications (2)
- Biobjective Optimization (1)
- Branch and Bound (1)
- Bundesliga (1)
- Connected Facility Location (1)
- Connected Facility Location, Branch-and-Cut, FTTx Deployment (1)
- Dynamic Traffic (1)
- FTTx, FTTH, FTTB, FTTC, FTTN, telecommunications, access networks, passive optical networks, network design, routing, energy efficiency (1)
- Hypervolume (1)
Institute
FTTx-PLAN
(2010)
Demonstrating energy-efficiency improvements in load-adaptive dynamic multilayer optical networks
(2014)
The discussion about sustainability and climate change as well as the energy cost perspective of network operators gives increasing attention to the energy efficiency of telecommunication networks. A promising way to improve the energy efficiency of such networks is the load-adaptive operation in which the network capacity is adjusted to the actual timevarying traffic transport needs. In this paper the concept of load-adaptive operation in the core network is explained, with the respective underlying optical network and the associated mathematical optimization. Within the DESI project a demonstrator has been realized with a commercially available WDM/OTN system. As results, concrete proven power and energy savings and the projected savings for a nationwide multilayer core network are reported.
We introduce a new variant of the connected facility location problem that allows for modeling mixed deployment strategies (FTTC/FTTB/FTTH) in the design of local access telecommunication networks. Several mixed integer programming models and valid inequalities are presented. Computational studies on realistic instances from three towns in Germany are provided.
In this paper we study the cost-optimal deployment of optical access networks considering variants of the problem such as fiber to the home (FTTH), fiber to the building (FTTB), fiber to the curb (FTTC), or fiber to the neighborhood (FTTN). We identify the combinatorial structures of the most important sub-problems arising in this area and model these, e.g., as capacitated facility location, concentrator location, or Steiner tree problems. We discuss modeling alternatives as well. We finally construct a “unified” integer programming model that combines all sub-models and provides a global view of all these FTTx problems. We also summarize computational studies of various special cases.
ILP heuristics and a new exact method for bi-objective 0/1 ILPs: Application to FTTx-network design
(2016)
We present two algorithms to solve a 3-objective optimization problem arising in telecommunications access network planning, the k-Architecture Connected Facility Location Problem. The methods can also be used to solve any 3-objective integer linear programming model and can be extended to the multiobjective case. We give some exemplary computations using small and medium-sized instances for our problem.