In a typical multicast scenario the tree members (users attached to the tree) change all the time... more In a typical multicast scenario the tree members (users attached to the tree) change all the time. New users join the tree, while some existing users leave it. Here we consider these dynamically changing multicast trees in two-layer, grooming- capable, optical networks. The continuous changing of the tree members (users) causes the degradation of the tree. Therefore a huge amount
2010 14th International Telecommunications Network Strategy and Planning Symposium (NETWORKS), 2010
ABSTRACT The difference between dedicated and shared protection is well known. In this paper we i... more ABSTRACT The difference between dedicated and shared protection is well known. In this paper we investigate these ideas applied to sharing power budgets of links. When defining protection paths not as a â??hot stand-byâ?? but rather as a â??cold stand-byâ?? the power needed for protection will be lower; therefore the routeable distance of certain connections should be longer, that increases the number of routeable demands. In this paper we present simulation results to show that in reality with the introduction of shared protection for Physical Impairment Constrained Routing (PICR) in large or saturated networks the number of routeable demands is lowered.
ABSTRACT In this paper, we investigate the problem of survivable all-optical routing in WDM netwo... more ABSTRACT In this paper, we investigate the problem of survivable all-optical routing in WDM networks with physical impairments. One of the recent key issues in survivable optical network design refers to maximization of the ratio of routeable demands while keeping the overall network cost low. In WDM networks, this goal can be achieved by routing as many demands in all-optical way as possible. Based on the latest technical trends driven by deployment costs, technical constraints, and backward compatibility, this will not mean that all demands will be routed in all-optical way in the near future. Nowadays, operators are mostly willing to dedicate only a given ratio of their power budget to all-optical routing. This in turn implies a new problem to be solved: operators have to find a way to select demands that should be routed in all-optical way and which should not. The problem gets even more complicated, if we add demand protection issues. In this paper, we introduce and evaluate methods able to maximize the number of demands routed with protection in all-optical way in capacity-constrained networks with limitations on path lengths according to physical impairments.
Networks 2008 - The 13th International Telecommunications Network Strategy and Planning Symposium, 2008
... libor Cinkler, P"ter Soproni, Marcell Perenyi. Janos Tapolcai, Peter... more ... libor Cinkler, P"ter Soproni, Marcell Perenyi. Janos Tapolcai, Peter Fodor, Andra's Gulyds, Gyula Sallai Department of TlEecomrmunications and Media inforniatics Budapest University of Technology and Economics E-mail: {cinkier, soproni, perenyim, tapolcai. ...
In a typical multicast scenario the tree members (users attached to the tree) change all the time... more In a typical multicast scenario the tree members (users attached to the tree) change all the time. New users join the tree, while some existing users leave it. Here we consider these dynamically changing multicast trees in two-layer, grooming- capable, optical networks. The continuous changing of the tree members (users) causes the degradation of the tree. Therefore a huge amount
2010 14th International Telecommunications Network Strategy and Planning Symposium (NETWORKS), 2010
ABSTRACT The difference between dedicated and shared protection is well known. In this paper we i... more ABSTRACT The difference between dedicated and shared protection is well known. In this paper we investigate these ideas applied to sharing power budgets of links. When defining protection paths not as a â??hot stand-byâ?? but rather as a â??cold stand-byâ?? the power needed for protection will be lower; therefore the routeable distance of certain connections should be longer, that increases the number of routeable demands. In this paper we present simulation results to show that in reality with the introduction of shared protection for Physical Impairment Constrained Routing (PICR) in large or saturated networks the number of routeable demands is lowered.
ABSTRACT In this paper, we investigate the problem of survivable all-optical routing in WDM netwo... more ABSTRACT In this paper, we investigate the problem of survivable all-optical routing in WDM networks with physical impairments. One of the recent key issues in survivable optical network design refers to maximization of the ratio of routeable demands while keeping the overall network cost low. In WDM networks, this goal can be achieved by routing as many demands in all-optical way as possible. Based on the latest technical trends driven by deployment costs, technical constraints, and backward compatibility, this will not mean that all demands will be routed in all-optical way in the near future. Nowadays, operators are mostly willing to dedicate only a given ratio of their power budget to all-optical routing. This in turn implies a new problem to be solved: operators have to find a way to select demands that should be routed in all-optical way and which should not. The problem gets even more complicated, if we add demand protection issues. In this paper, we introduce and evaluate methods able to maximize the number of demands routed with protection in all-optical way in capacity-constrained networks with limitations on path lengths according to physical impairments.
Networks 2008 - The 13th International Telecommunications Network Strategy and Planning Symposium, 2008
... libor Cinkler, P"ter Soproni, Marcell Perenyi. Janos Tapolcai, Peter... more ... libor Cinkler, P"ter Soproni, Marcell Perenyi. Janos Tapolcai, Peter Fodor, Andra's Gulyds, Gyula Sallai Department of TlEecomrmunications and Media inforniatics Budapest University of Technology and Economics E-mail: {cinkier, soproni, perenyim, tapolcai. ...
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