conference publications

2022

1. C-21

   Multivariate Spatio-temporal Cellular Traffic Prediction with Handover Based Clustering

   Evren Tuna, and Alkan Soysal

   In Conference on Information Sciences and Systems (CISS), Mar 2022

   Abs Bib PDF   ·   NextG     ·   ML  

   We consider an RNN-based traffic volume prediction, which is a critical problem for network slice management and resource allocation in slicing-enabled next generation cellular networks. We propose to use a novel cost function that takes SLA violations into account. Our approach is multivariate and spatio-temporal in three aspects. First, we consider the effects of several other RAN features in a cell besides the traffic volume. Second, we introduce feature vectors based on peak hours of the day and days of the week. Third, we introduce feature vectors based on incoming handover statistics from the neighboring cells. Our results show about 60% improvement over MAE-based univariate LSTM models and about 20% improvement over SLA-based univariate models.

   @inproceedings{Tuna2022,
     author = {Tuna, Evren and Soysal, Alkan},
     booktitle = {Conference on Information Sciences and Systems (CISS)},
     title = {Multivariate Spatio-temporal Cellular Traffic Prediction with Handover Based Clustering},
     year = {2022},
     month = mar,
     pages = {55--59},
     doi = {10.1109/CISS53076.2022.9751165},
   }

   ---

2019

1. C-20

   Age of Information Scaling in Large Networks with Hierarchical Cooperation

   Baturalp Buyukates, Alkan Soysal, and Sennur. Ulukus

   In IEEE Global Communications Conference (Globecom), Dec 2019

   Bib   ·   AoI  

   @inproceedings{Buyukates19d,
     author = {Buyukates, Baturalp and Soysal, Alkan and Ulukus, Sennur.},
     title = {Age of Information Scaling in Large Networks with Hierarchical Cooperation},
     year = {2019},
     month = dec,
     booktitle = {IEEE Global Communications Conference (Globecom)},
   }

   ---

2. C-19

   Age of Information in Multicast Networks with Multiple Update Streams

   Baturalp Buyukates, Alkan Soysal, and Sennur Ulukus

   In Asilomar Conference on Signals, Systems and Computers, Nov 2019

   Bib   ·   AoI  

   @inproceedings{Buyukates19c,
     author = {Buyukates, Baturalp and Soysal, Alkan and Ulukus, Sennur},
     title = {Age of Information in Multicast Networks with Multiple Update Streams},
     year = {2019},
     month = nov,
     booktitle = {Asilomar Conference on Signals, Systems and Computers},
   }

   ---

3. C-18

   Age of Information in G/G/1/1 Systems

   Alkan Soysal, and Sennur Ulukus

   In Asilomar Conference on Signals, Systems and Computers, Nov 2019

   Bib   ·   NextG     ·   AoI  

   @inproceedings{Soysal18,
     author = {Soysal, Alkan and Ulukus, Sennur},
     booktitle = {Asilomar Conference on Signals, Systems and Computers},
     title = {Age of Information in G/G/1/1 Systems},
     year = {2019},
     month = nov,
   }

   ---

4. C-17

   Age of Information Scaling in Large Networks

   Baturalp Buyukates, Alkan Soysal, and Sennur Ulukus

   In IEEE International Conference on Communications (ICC), May 2019

   Bib   ·   AoI  

   @inproceedings{Buyukates19a,
     author = {Buyukates, Baturalp and Soysal, Alkan and Ulukus, Sennur},
     booktitle = {IEEE International Conference on Communications (ICC)},
     title = {Age of Information Scaling in Large Networks},
     year = {2019},
     month = may,
   }

   ---

2018

1. C-16

   Age of Information in Two-Hop Multicast Networks

   Baturalp Buyukates, Alkan Soysal, and Sennur Ulukus

   In Asilomar Conference on Signals, Systems and Computers, Nov 2018

   Bib   ·   AoI  

   @inproceedings{Buyukates18,
     author = {Buyukates, Baturalp and Soysal, Alkan and Ulukus, Sennur},
     booktitle = {Asilomar Conference on Signals, Systems and Computers},
     title = {Age of Information in Two-Hop Multicast Networks},
     year = {2018},
     month = nov,
   }

   ---

2017

1. C-15

   Energy Efficiency Optimization for Non-Overlay Planning of Heterogeneous Cellular Networks

   Mahmut Demirtas, and Alkan Soysal

   In International conference on Wireless Communications & Mobile Computing (IWCMC), Jun 2017

   Bib   ·   NextG  

   @inproceedings{Demirtas2017b,
     author = {Demirtas, Mahmut and Soysal, Alkan},
     booktitle = {International conference on Wireless Communications & Mobile Computing (IWCMC)},
     title = {Energy Efficiency Optimization for Non-Overlay Planning of Heterogeneous Cellular Networks},
     year = {2017},
     month = jun,
     note = {ISSN: 2376-6506},
     pages = {1251--1255},
     doi = {10.1109/IWCMC.2017.7986464},
   }

   ---

2015

1. C-14

   Energy and Spectral Efficient Microcell Deployment in Heterogeneous Cellular Networks

   Mahmut Demirtas, and Alkan Soysal

   In IEEE Vehicular Technology Conference (VTC), May 2015

   Bib   ·   NextG  

   @inproceedings{Demirtas2015,
     author = {Demirtas, Mahmut and Soysal, Alkan},
     booktitle = {IEEE Vehicular Technology Conference (VTC)},
     title = {Energy and Spectral Efficient Microcell Deployment in Heterogeneous Cellular Networks},
     year = {2015},
     month = may,
     note = {ISSN: 1550-2252},
     pages = {1--5},
     doi = {10.1109/VTCSpring.2015.7145803},
   }

   ---

2014

1. C-13

   Optimality of Beamforming in Fading MIMO with Noisy Channel Estimation

   Alkan Soysal

   In IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Sep 2014

   Bib   ·   MIMO  

   @inproceedings{Soysal2014,
     author = {Soysal, Alkan},
     booktitle = {IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)},
     title = {Optimality of Beamforming in Fading MIMO with Noisy Channel Estimation},
     year = {2014},
     month = sep,
     note = {ISSN: 2166-9589},
     pages = {423--427},
     doi = {10.1109/PIMRC.2014.7136202},
   }

   ---

2013

1. C-12

   Short Paper: Performance Analysis of MIMO-based Decode-and-Forward Relaying VANETs

   Bengi Aygün, Alkan Soysal, and Alexander M. Wyglinski

   In IEEE Vehicular Networking Conference (VNC), Dec 2013

   Bib   ·   MIMO  

   @inproceedings{Aygun2014,
     author = {Aygün, Bengi and Soysal, Alkan and Wyglinski, Alexander M.},
     booktitle = {IEEE Vehicular Networking Conference (VNC)},
     year = {2013},
     month = dec,
     note = {ISSN: 2157-9865},
     pages = {222--225},
     doi = {10.1109/VNC.2013.6737618},
   }

   ---

2. C-11

   Fading MIMO Relay Channels with Channel Estimation Error

   Bengi Aygün, and Alkan Soysal

   In IEEE International Conference on Communications (ICC), Jun 2013

   Bib   ·   MIMO  

   @inproceedings{Aygun2013b,
     author = {Aygün, Bengi and Soysal, Alkan},
     booktitle = {IEEE International Conference on Communications (ICC)},
     title = {Fading MIMO Relay Channels with Channel Estimation Error},
     year = {2013},
     month = jun,
     note = {ISSN: 1938-1883},
     pages = {5522--5526},
     doi = {10.1109/ICC.2013.6655470},
   }

   ---

2012

1. C-10

   Fading MIMO Relay Channels with Covariance Feedback

   Bengi Aygun, and Alkan Soysal

   In IEEE Wireless Communications and Networking Conference (WCNC), Apr 2012

   Bib   ·   MIMO  

   @inproceedings{Aygun2012,
     author = {Aygun, Bengi and Soysal, Alkan},
     booktitle = {IEEE Wireless Communications and Networking Conference (WCNC)},
     title = {Fading MIMO Relay Channels with Covariance Feedback},
     year = {2012},
     month = apr,
     note = {ISSN: 1558-2612},
     pages = {70--74},
     doi = {10.1109/WCNC.2012.6214463},
   }

   ---

2011

1. C-9

   A Method for Optimizing Matrix Valued Functions and its Applications to Capacity of MIMO Systems

   Alkan Soysal

   In Telecommunications Forum (TELFOR), Nov 2011

   Bib   ·   MIMO  

   @inproceedings{Soysal2011,
     author = {Soysal, Alkan},
     booktitle = {Telecommunications Forum (TELFOR)},
     title = {A Method for Optimizing Matrix Valued Functions and its Applications to Capacity of MIMO Systems},
     year = {2011},
     month = nov,
     pages = {285--288},
     doi = {10.1109/TELFOR.2011.6143546},
   }

   ---

2. C-8

   Achieving the Lower Bound of Fading MIMO Relay Channels with Covariance Feedback at the Transmitters

   Bengi Aygün, and Alkan Soysal

   In International conference on Wireless Communications & Mobile Computing (IWCMC), Jul 2011

   Bib   ·   MIMO  

   @inproceedings{Aygun2011,
     author = {Aygün, Bengi and Soysal, Alkan},
     booktitle = {International conference on Wireless Communications & Mobile Computing (IWCMC)},
     title = {Achieving the Lower Bound of Fading MIMO Relay Channels with Covariance Feedback at the Transmitters},
     year = {2011},
     month = jul,
     note = {ISSN: 2376-6506},
     pages = {900--905},
     doi = {10.1109/IWCMC.2011.5982666},
   }

   ---

2010

1. C-7

   Tightness of Capacity Bounds in Correlated MIMO Systems with Channel Estimation Error

   Alkan Soysal

   In IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Sep 2010

   Bib   ·   MIMO  

   @inproceedings{Soysal2010c,
     author = {Soysal, Alkan},
     booktitle = {IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)},
     title = {Tightness of Capacity Bounds in Correlated MIMO Systems with Channel Estimation Error},
     year = {2010},
     month = sep,
     note = {ISSN: 2166-9589},
     pages = {667--671},
     doi = {10.1109/PIMRC.2010.5671679},
   }

   ---

2008

1. C-6

   MIMO Multiple Access Channels with Noisy Channel Estimation and Partial CSI Feedback

   Alkan Soysal, and Sennur Ulukus

   In IEEE Global Communications Conference (Globecom), Nov 2008

   Bib   ·   MIMO  

   @inproceedings{Soysal2008,
     author = {Soysal, Alkan and Ulukus, Sennur},
     booktitle = {IEEE Global Communications Conference (Globecom)},
     title = {MIMO Multiple Access Channels with Noisy Channel Estimation and Partial CSI Feedback},
     year = {2008},
     month = nov,
     note = {ISSN: 1930-529X},
     pages = {1--5},
     doi = {10.1109/GLOCOM.2008.ECP.855},
   }

   ---

2. C-5

   Channel Estimation and Adaptive M-QAM in Cognitive Radio Links

   Alkan Soysal, Sennur Ulukus, and Charles Clancy

   In IEEE International Conference on Communications (ICC), May 2008

   Bib   ·   MIMO     ·   NextG  

   @inproceedings{Soysal2008b,
     author = {Soysal, Alkan and Ulukus, Sennur and Clancy, Charles},
     booktitle = {IEEE International Conference on Communications (ICC)},
     title = {Channel Estimation and Adaptive M-QAM in Cognitive Radio Links},
     year = {2008},
     month = may,
     note = {ISSN: 1938-1883},
     pages = {4043--4047},
     doi = {10.1109/ICC.2008.759},
   }

   ---

3. C-4

   Optimizing the Rate of a Correlated MIMO Link Jointly over Channel Estimation and Data Transmission Parameters

   Alkan Soysal, and Sennur Ulukus

   In Conference on Information Sciences and Systems (CISS), Mar 2008

   Bib   ·   MIMO  

   @inproceedings{Soysal2008c,
     author = {Soysal, Alkan and Ulukus, Sennur},
     booktitle = {Conference on Information Sciences and Systems (CISS)},
     title = {Optimizing the Rate of a Correlated MIMO Link Jointly over Channel Estimation and Data Transmission Parameters},
     year = {2008},
     month = mar,
     pages = {74--79},
     doi = {10.1109/CISS.2008.4558498},
   }

   ---

2006

1. C-3

   Optimum Power Allocation in Fading MIMO Multiple Access Channels with Partial CSI at the Transmitters

   Alkan Soysal, and Sennur Ulukus

   In Asilomar Conference on Signals, Systems and Computers, Oct 2006

   Bib   ·   MIMO  

   @inproceedings{Soysal2006,
     author = {Soysal, Alkan and Ulukus, Sennur},
     booktitle = {Asilomar Conference on Signals, Systems and Computers},
     title = {Optimum Power Allocation in Fading MIMO Multiple Access Channels with Partial CSI at the Transmitters},
     year = {2006},
     month = oct,
     note = {ISSN: 1058-6393},
     pages = {1526--1530},
     doi = {10.1109/ACSSC.2006.355013},
   }

   ---

2005

1. C-2

   Asymptotic Optimality of Beamforming in Multi-User MIMO-MAC with No or Partial CSI at the Transmitters

   Alkan Soysal, and Sennur Ulukus

   In IEEE Vehicular Technology Conference (VTC), May 2005

   Bib   ·   MIMO  

   @inproceedings{Soysal2005,
     author = {Soysal, Alkan and Ulukus, Sennur},
     booktitle = {IEEE Vehicular Technology Conference (VTC)},
     title = {Asymptotic Optimality of Beamforming in Multi-User MIMO-MAC with No or Partial CSI at the Transmitters},
     year = {2005},
     month = may,
     note = {ISSN: 1550-2252},
     pages = {1619--1623 Vol. 3},
     volume = {3},
     doi = {10.1109/VETECS.2005.1543594},
   }

   ---

2. C-1

   Transmit Directions and Optimality of Beamforming in MIMO-MAC with Partial CSI at the Transmitters

   Alkan Soysal, and Sennur Ulukus

   In Conference on Information Sciences and Systems (CISS), Mar 2005

   Bib   ·   MIMO  

   @inproceedings{Soysal2005b,
     author = {Soysal, Alkan and Ulukus, Sennur},
     booktitle = {Conference on Information Sciences and Systems (CISS)},
     title = {Transmit Directions and Optimality of Beamforming in MIMO-MAC with Partial CSI at the Transmitters},
     year = {2005},
     month = mar,
   }

   ---