@misc{GiovanidisBrueckD'Andreagiovannietal., author = {Giovanidis, Anastasios and Brueck, Stefan and D'Andreagiovanni, Fabio and Krolikowski, Jonatan and Hartanto Tanzil, Vicky}, title = {A 0-1 Program for Minimum Clustering in Downlink Base Station Cooperation}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-12776}, number = {11-19}, abstract = {Base station cooperation in the downlink of cellular systems has been recently suggested as a promising concept towards a better exploitation of the communication system physical resources. It may offer a high gain in capacity through interference mitigation. This however, comes at a cost of high information exchange between cooperating entities and a high computational burden. Clustering of base stations into subgroups is an alternative to guarantee such cooperation benefits in a lower scale. The optimal definition of clusters, however, and a systematic way to find a solution to such problem is not yet available. In this work, we highlight the combinatorial nature of the problem, exploit this to describe the system of users and base stations as a graph and formulate a pure 0-1 program. Its solution suggests a cost optimal way to form clusters and assign user subsets to them.}, language = {en} } @misc{GiovanidisPulaj, author = {Giovanidis, Anastasios and Pulaj, Jonad}, title = {The Multiperiod Network Design Problem: Lagrangian-based Solution Approaches}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-13367}, number = {11-31}, abstract = {We present and prove a theorem which gives the optimal dual vector for which a Lagrangian dual problem in the Single Period Design Problem (SPDP) is maximized. Furthermore we give a straightforward generalization to the Multi-Period Design Problem (MPDP). Based on the optimal dual values derived we compute the solution of the Lagrangian relaxation and compare it with the linear relaxation and optimal IP values.}, language = {en} } @article{GiovanidisWunderBoche2007, author = {Giovanidis, Anastasios and Wunder, Gerhard and Boche, Holger}, title = {An Optimal Stopping Approach to ARQ Protocols with Variable Success Probabilities per Retransmission}, series = {45th Ann. Allerton Conf.}, journal = {45th Ann. Allerton Conf.}, year = {2007}, language = {en} } @article{GiovanidisWunderBocheetal.2008, author = {Giovanidis, Anastasios and Wunder, Gerhard and Boche, Holger and Stefanov, Stoycho}, title = {Optimal Control of Transmission Errors with Power Allocation and Stability in ARQ Downlink}, series = {CISS'08, Princeton, USA}, journal = {CISS'08, Princeton, USA}, year = {2008}, language = {en} } @article{GiovanidisWunderBuehler2009, author = {Giovanidis, Anastasios and Wunder, Gerhard and Buehler, J{\"o}rg}, title = {Optimal Control of a Single Queue with Retransmissions}, series = {IEEE Trans. on Wireless Communications}, volume = {8, no. 7}, journal = {IEEE Trans. on Wireless Communications}, pages = {3736 -- 3746}, year = {2009}, language = {en} } @article{WieseGiovanidisWunder2008, author = {Wiese, M. and Giovanidis, Anastasios and Wunder, Gerhard}, title = {Optimal Power Allocation Policies for the Reliable Transmission of a Single Packet via ARQ Protocols}, series = {Asilomar Conf. on Sign. Sys. and Comp.}, journal = {Asilomar Conf. on Sign. Sys. and Comp.}, year = {2008}, language = {en} } @book{Giovanidis2010, author = {Giovanidis, Anastasios}, title = {ARQ protocols in wireless communications}, publisher = {SVH Verlag}, isbn = {978-3-8381-2055-3}, year = {2010}, language = {en} } @inproceedings{GiovanidisHausteinHadisusantoetal.2006, author = {Giovanidis, Anastasios and Haustein, T. and Hadisusanto, Y. and Sezgin, A. and Kim, D.}, title = {Multiuser Scheduling using Equal Power in Allocated Subcarriers for OFDM Uplink}, series = {40th Annual Asilomar Conference on Signals, Systems and Computers, Monterey, USA}, booktitle = {40th Annual Asilomar Conference on Signals, Systems and Computers, Monterey, USA}, year = {2006}, language = {en} } @inproceedings{GiovanidisHausteinJorswiecketal.2007, author = {Giovanidis, Anastasios and Haustein, T. and Jorswieck, E. and Kim, D.}, title = {Maximization of the Single User Rate in OFDMA Assuming Equal Power on Allocated Subcarriers}, series = {IEEE 65th Vehicular Technology Conference VTC2007-Spring, Dublin, Ireland}, booktitle = {IEEE 65th Vehicular Technology Conference VTC2007-Spring, Dublin, Ireland}, year = {2007}, language = {en} } @inproceedings{GiovanidisSezginMoenichetal.2007, author = {Giovanidis, Anastasios and Sezgin, A. and M{\"o}nich, U. and Kim, D.}, title = {Dynamic User Grouping and Shared Frequency Resource Assignment Strategies for OFDMA}, series = {IEEE 65th Vehicular Technology Conference VTC2007-Spring, Dublin, Ireland}, booktitle = {IEEE 65th Vehicular Technology Conference VTC2007-Spring, Dublin, Ireland}, year = {2007}, language = {en} } @inproceedings{GiovanidisStanczak2009, author = {Giovanidis, Anastasios and Stanczak, Slawomir}, title = {Conditions for the Stability of Wireless ARQ Protocols and Reliable Communications}, series = {15th European Wireless Conference, Aalborg, Denmark}, booktitle = {15th European Wireless Conference, Aalborg, Denmark}, year = {2009}, language = {en} } @article{GiovanidisStanczak2009, author = {Giovanidis, Anastasios and Stanczak, Slawomir}, title = {Retransmission Aware Congestion Control and Distributed Power Allocation in MANETs}, series = {Proc. 5th Int. Workshop on Resource Allocation, Cooperation and Competition in Wireless Networks (RAWNET/WNC3), Seoul, Korea}, journal = {Proc. 5th Int. Workshop on Resource Allocation, Cooperation and Competition in Wireless Networks (RAWNET/WNC3), Seoul, Korea}, year = {2009}, language = {en} } @article{GiovanidisStanczak2011, author = {Giovanidis, Anastasios and Stanczak, Slawomir}, title = {Stability and Distributed Power Control in MANETs with per Hop Retransmissions}, series = {IEEE Trans. on Communications}, journal = {IEEE Trans. on Communications}, year = {2011}, language = {en} } @article{GiovanidisWunderBoche2008, author = {Giovanidis, Anastasios and Wunder, Gerhard and Boche, Holger}, title = {A short-term throughput measure for communications using ARQ protocols}, series = {Proc. 7th ITG Conf. on SCC}, journal = {Proc. 7th ITG Conf. on SCC}, year = {2008}, language = {en} } @misc{GiovanidisLiaoStanczak, author = {Giovanidis, Anastasios and Liao, Qi and Stanczak, Slawomir}, title = {Measurement Based Self-Optimization in Random Access Communications}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-12764}, number = {11-18}, abstract = {The current work considers random access communications within a single cell and provides an algorithmic suggestion for the almost optimal coordination of user actions. In the scenario considered, an access effort is successful if (a) the signal is detected at the receiver and (b) no collision occurs. The first event is controlled by the user transmission power and the second by the choice of access (back-off) probability. These constitute the user action pair. The algorithm aims at exploiting information from measurements and user reports, in order to estimate current values of the system situation. Based on these, two optimization problems can be formulated and solved for the so called contention level and transmission power level at the base station side. The methodology to find the optimal values is based on minimization of a drift function. The two values are broadcast in order to help the users update their actions ``almost optimally``. In this way the wireless cell can achieve self-optimization, without outside coordination, by relying on such intelligent information exchange and parameter estimation. Numerical results illustrate the great benefits of the suggested algorithm, compared to scenarios where the actions remain fixed, at a very low or even zero cost in power expenditure and delay.}, language = {en} }