Name
Title | ||
|---|---|---|
Increasing sum-rate in large-scale cognitive radio networks by centralized power and spectrum allocation. |
Abstract | ||
|---|---|---|
Abstract We revisit the widely investigated problem of maximizing the centralized sum-rate capacity in a cognitive radio network. We consider an interference-limited multi-user multi-channel environment, with a transmit sum-power constraint over all channels as well as an aggregate average interference constraint towards multiple primary users. Until very recently only sub-optimal algorithms were proposed due to the inherent non-convexity of the problem. Yet, the problem at hand has been neglected in the large-scale setting (i.e., number of nodes and channels) as usually encountered in practical scenarios. To tackle this issue, we first propose an exact mathematical adaptation of the well-known successive convex geometric programming with condensation approximations (SCVX) to better cope with large systems while keeping the convergence proof intact. Alternatively, we also propose a novel efficient low-complexity heuristic algorithm, ELCI. ELCI is an iterative approach, where the constraints are handled alternately based on the special property of the optimal solution, with a particular power update formulation based on the KKT conditions of the problem. In order to demonstrate ELCI’s efficiency we compare it to two state-of-the-art algorithms, SCVX, and the recently proposed global optimum approach, MARL. The salient highlight of ELCI is the relatively fast and very good sub-optimal performance in large-scale CR systems. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1186/1687-1499-2012-362 | EURASIP J. Wireless Comm. and Networking |
Field | DocType | Volume |
Convergence (routing),Mathematical optimization,Heuristic (computer science),Computer science,Computer network,Communication channel,Interference (wave propagation),Frequency allocation,Geometric programming,Karush–Kuhn–Tucker conditions,Cognitive radio | Journal | 2012 |
Issue | ISSN | Citations |
362 | 1687-1499 | 14 |
PageRank | References | Authors |
0.37 | 23 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Luxmiram Vijayandran | 1 | 41 | 1.83 |
| Sang-Seon Byun | 2 | 106 | 10.23 |
| Geir E. Øien | 3 | 381 | 43.38 |
| torbjorn ekman | 4 | 460 | 33.17 |