@article{seth_yuksel_vosoughi_2024, title={Beamsteering Optimization for Line-of-Sight Millimeter-Wave Radios for D2D Communication}, url={https://doi.org/10.36227/techrxiv.173385606.64934673/v1}, DOI={10.36227/techrxiv.173385606.64934673/v1}, abstractNote={5G wireless networks harness the extensive spectrum available in the millimeter-wave (mmWave) frequency bands which set them apart from current wireless systems in terms of directivity, propagation loss, and susceptibility to blockages. Sub-6 GHz systems can attain omni-directional coverage, displaying limited sensitivity to physical obstacles. Still, they are incapable of achieving the same level of service quality as systems outfitted with electronically steerable directional antennas offering reduced propagation loss and higher gains due to the beam directionality. In our framework, we investigate the utilization of directional, steerable device-to-device (D2D) mmWave antennas as integral components. The nodes communicate by manipulating the orientation of their antennas, i.e., steering their beams. To minimize dependence on a base station, the D2D nodes are categorized into primary and secondary ones and they communicate in three phases: Uplink, Downlink, and PAPA. We delve into the impact of optimal steering of the main lobe beams transmitted by these D2D antennas as well as optimizing the time sharing among three phases. Within each phase, we assume that the nodes follow a random transmission scheduling scheme and derive the achievable rates accordingly. Through meticulous design of polynomial-time heuristics, we maximize the overall network capacity.}, author={Seth, Sayanta and Yuksel, Murat and Vosoughi, Azadeh}, year={2024}, month={Dec} }
 @article{seth_roy_yuksel_2024, title={Cognisseum: Cognitive radios on Colosseum facing adversaries}, volume={254}, ISSN={1389-1286}, url={http://dx.doi.org/10.1016/j.comnet.2024.110818}, DOI={10.1016/j.comnet.2024.110818}, journal={Computer Networks}, publisher={Elsevier BV}, author={Seth, Sayanta and Roy, Debashri and Yuksel, Murat}, year={2024}, month={Dec}, pages={110818} }
 @misc{seth_yuksel_vosoughi_2023, title={Ad-hoc Coalition Set Formation among Directional Radios}, url={http://dx.doi.org/10.1109/mass58611.2023.00010}, DOI={10.1109/mass58611.2023.00010}, abstractNote={The vast amount of spectrum in the millimeter wave (mmWave) and Terahertz bands are exploited by Fifth Generation (5G)-and-beyond mobile networks in order to attain more wireless capacity. The fundamental differentiating factor of mmWave/Terahertz radios from existing wireless systems is in terms of directivity, propagation loss, and blockage sensitivity. With the dramatic increase in adoption of mmWave/Terahertz directional antennas/nodes within the mainstream wireless networks, efficient, effective and decentralized forming of coalitions from such nodes is of interest for the goal of improving the throughput of a wireless network. In this work, we form sets of coalitions in a decentralized manner using a novel heuristic framework by categorizing directional radio nodes and placing them into coalitions. We explore heuristic designs that guarantee placement of all nodes in a coalition as well as focus on maximizing the sum rate of the coalition set at the expense of isolating some nodes. We perform simulations to gain insight into the design of these ad-hoc coalition set formation heuristics.}, journal={2023 IEEE 20th International Conference on Mobile Ad Hoc and Smart Systems (MASS)}, publisher={IEEE}, author={Seth, Sayanta and Yuksel, Murat and Vosoughi, Azadeh}, year={2023}, month={Sep}, pages={10–18} }
 @misc{seth_yuksel_vosoughi_2022, title={Forming Coalition Sets from Directional Radios}, url={http://dx.doi.org/10.1109/MILCOM55135.2022.10017951}, DOI={10.1109/MILCOM55135.2022.10017951}, abstractNote={Fifth Generation (5G) mobile networks aim to exploit the vast amount of spectrum in the millimeter wave (mmWave) and Terahertz bands for more capacity. mmWave/Terahertz radios fundamentally differ from existing wireless systems in terms of directivity, propagation loss, and blockage sensitivity. As these mmWave/Terahertz directional antennas/nodes are becoming part of mainstream wireless networks, effective and efficient forming of coalitions from such nodes is of interest for the goal of increasing the sum rate of a wireless network. We design a novel heuristic framework to form sets of coalitions by categorizing directional radio nodes and distributing them into coalitions while assuring that no node is isolated, and show that polynomial-time heuristics can perform well in forming coalition sets out of directional radios.}, journal={MILCOM 2022 - 2022 IEEE Military Communications Conference (MILCOM)}, publisher={IEEE}, author={Seth, Sayanta and Yuksel, Murat and Vosoughi, Azadeh}, year={2022}, month={Nov}, pages={507–514} }
 @misc{yazdani_seth_vosoughi_yuksel_2022, title={Throughput-Optimal D2D mmWave Communication: Joint Coalition Formation, Power, and Beam Optimization}, url={http://dx.doi.org/10.1109/WCNC51071.2022.9771608}, DOI={10.1109/WCNC51071.2022.9771608}, abstractNote={In this paper, we consider a device-to-device (D2D) millimeter Wave (mmWave) network that allocates a spectrum band with bandwidth B<inf>c</inf> Hz exclusively to support communication of N cooperative D2D pairs over Rayleigh fading channels. The available bandwidth is divided into N<inf>c</inf> non-overlapping sub-bands. Each node is equipped with a directional antenna that is capable of steering its beam within its field of view. Also, each transmitter can adjust its transmit power. Aiming at maximizing the network throughput, the cooperative D2D pairs form N<inf>c</inf> disjoint coalitions, where the D2D pairs in a particular coalition share the same sub-band for communication and hence cause co-channel interference. We address this question: What is the best coalition among the D2D pairs, the optimal beams steering angles of directional antennas of the D2D pairs within each coalition, and the optimal transmit powers such that the network throughput is maximized? We formulate the network throughput maximization problem, subject to certain constraints, and we propose an iterative method, based on the block coordinate descent (BCD) algorithm, to solve the constrained optimization problem. Specially, we propose a coalitional game approach for coalition formation among the D2D pairs. We numerically investigate the effects of different system parameters (e.g., N, N<inf>c</inf>, the antenna gain, the maximum allowed total transmit power), as well as the impact of optimizing coalition formation only, and optimizing transmit power only, on the network throughput maximization.}, journal={2022 IEEE Wireless Communications and Networking Conference (WCNC)}, publisher={IEEE}, author={Yazdani, Hassan and Seth, Sayanta and Vosoughi, Azadeh and Yuksel, Murat}, year={2022}, month={Apr}, pages={1539–1544} }
 @misc{mustafa_seth_yuksel_rahman_2021, title={Cellular Service with Settlement-Free Peering}, url={http://dx.doi.org/10.1109/DySPAN53946.2021.9677342}, DOI={10.1109/DySPAN53946.2021.9677342}, abstractNote={Despite several iconic innovations in wireless networks, cellular service still remains largely unreliable with regards to non-urban network coverage. Cellular providers often need to make roaming agreements among each other for serving their customers with basic connectivity in areas where they do not have coverage. Considering all the technical limitations of domestic roaming, we present a "wireless peering" model for settlement-free spectrum sharing. It allows providers to extend their coverage to "off-network" regions without any hardware modifications. Its software-defined nature makes the model highly scalable, easy to deploy and cost-effective. Simulation results show a significant improvement in off-network wireless speed, data allowance, and network coverage as well as increase in provider revenue when compared to roaming.}, journal={2021 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)}, publisher={IEEE}, author={Mustafa, Shahzeb and Seth, Sayanta and Yuksel, Murat and Rahman, Mostafizur}, year={2021}, month={Dec}, pages={153–162} }
 @misc{seth_yazdani_yuksel_vosoughi_2021, title={Rate-Optimizing Beamsteering for Line-of-Sight Directional Radios with Random Scheduling}, url={http://dx.doi.org/10.1109/DySPAN53946.2021.9677321}, DOI={10.1109/DySPAN53946.2021.9677321}, abstractNote={Fifth Generation (5G) mobile networks aim to exploit the huge amount of spectrum in the millimeter wave (mmWave) or Terahertz bands to increase communication capacity. mmWave and Terahertz radios fundamentally differ from existing wireless systems in terms of directivity, propagation loss, and blockage sensitivity. Traditional sub-6 GHz radios are not as sensitive to physical obstruction or blockage since they are equipped with omni-directional antennas; however, they cannot attain the service quality provided by systems equipped with directional antennas with high directive gains and low directional propagation loss. We explore high frequency mmWave/Terahertz antennas as part of a network, where nodes/antennas communicate with each other by steering their beams, following a random communication schedule. We systematically structure the random scheduling of nodes and design the corresponding throughput expressions. We investigate the result of optimally steering main lobe beams of these antennas, and its effect on the network capacity.}, journal={2021 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)}, publisher={IEEE}, author={Seth, Sayanta and Yazdani, Hassan and Yuksel, Murat and Vosoughi, Azadeh}, year={2021}, month={Dec}, pages={53–60} }
 @inbook{seth_roy_yuksel_2021, title={Spectrum Sharing Secondary Users in Presence of Multiple Adversaries}, ISBN={9783030874728 9783030874735}, ISSN={1865-0929 1865-0937}, url={http://dx.doi.org/10.1007/978-3-030-87473-5_12}, DOI={10.1007/978-3-030-87473-5_12}, booktitle={Communications in Computer and Information Science}, publisher={Springer International Publishing}, author={Seth, Sayanta and Roy, Debashri and Yuksel, Murat}, year={2021}, pages={125–135} }