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» Approximate Flow-Aware Networking
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TIT
2011
131views more  TIT 2011»
14 years 4 months ago
On the Hardness of Approximating the Network Coding Capacity
Abstract—This work addresses the computational complexity of achieving the capacity of a general network coding instance. We focus on the linear capacity, namely the capacity of ...
Michael Langberg, Alexander Sprintson
OL
2008
82views more  OL 2008»
14 years 9 months ago
An approximation algorithm for network design problems with downwards-monotone demand functions
Building on an existing 2-approximate algorithm for the class of network design problems with downwards-monotone demand functions, many of which are NP-hard, we present an algorith...
Michael Laszlo, Sumitra Mukherjee
TCOM
2011
138views more  TCOM 2011»
14 years 4 months ago
Exact and Asymptotic Outage Probability Analysis for Decode-and-Forward Networks
Abstract—We consider decode-and-forward cooperative networks and we derive analytical expressions as well as tractable asymptotic approximations for the outage probability of a n...
Ioannis Chatzigeorgiou, Weisi Guo, Ian J. Wassell,...
CORR
2011
Springer
179views Education» more  CORR 2011»
14 years 1 months ago
Approximating minimum-power edge-multicovers
Given a graph with edge costs, the power of a node is the maximum cost of an edge incident to it, and the power of a graph is the sum of the powers of its nodes. Motivated by appli...
Nachshon Cohen, Zeev Nutov
SIAMCOMP
2010
125views more  SIAMCOMP 2010»
14 years 4 months ago
Approximating Steiner Networks with Node-Weights
The (undirected) Steiner Network problem is: given a graph = ( , ) with edge/node-weights and edge-connectivity requirements { ( , ) : , }, find a minimumweight subgraph of conta...
Zeev Nutov