TY - GEN
A1 - Krumke, Sven
A1 - Poensgen, Diana
T1 - Online Call Admission in Optical Networks with Larger Wavelength Demands
N2 - In the problem of \emph{Online Call Admission in Optical Networks}, briefly called \textsc{oca}, we are given a graph $G=(V,E)$ together with a set of wavelengths~$W$ and a finite sequence $\sigma=r_1,r_2,\dots$ of calls which arrive in an online fashion. Each call~$r_j$ specifies a pair of nodes to be connected and an integral demand indicating the number of required lightpaths. A lightpath is a path in~$G$ together with a wavelength~$\lambda \in W$. Upon arrival of a call, an online algorithm must decide immediately and irrevocably whether to accept or to reject the call without any knowledge of calls which appear later in the sequence. If the call is accepted, the algorithm must provide the requested number of lightpaths to connect the specified nodes. The essential restriction is the wavelength conflict constraint: each wavelength is available only once per edge, which implies that two lightpaths sharing an edge must have different wavelengths. Each accepted call contributes a benefit equal to its demand to the overall profit. The objective in \textsc{oca} is to maximize the overall profit. Competitive algorithms for \textsc{oca} have been known for the special case where every call requests just a single lightpath. In this paper we present the first competitive online algorithms for the general case of larger demands.
T3 - ZIB-Report - 02-22
KW - Call Admission
KW - Routing and Wavelength Allocation
KW - Optical Networks
KW - Competitive Analysis
KW - Colorability
Y1 - 2002
UR - https://opus4.kobv.de/opus4-zib/frontdoor/index/index/docId/689
UR - https://nbn-resolving.org/urn:nbn:de:0297-zib-6890
ER -