Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği
Permanent URI for this collectionhttps://hdl.handle.net/11147/11
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Conference Object Citation - WoS: 1Citation - Scopus: 1Cell Load Based User Association for Tetra Trunk Systems(Institute of Electrical and Electronics Engineers Inc., 2018) Karataş, Azad; Özbek, Berna; Bardak, Erinç Deniz; Sönmez, İlkerIncreasing traffic in communication systems need efficient new cell selection algorithms to control the distribution of users. For better and seamless transmission, load balancing become critical factors for cell selection algorithms. Un-desired consequents in these situations may cause disasters specifically for the emergency cases in public safety services. In this paper, a cell selection algorithm is proposed for Terrestrial Trunked Radio (TETRA) based Professional Mobile Radio (PMR) systems. The proposed algorithm is designed to provide a fairer distribution of users among cells while keeping the number of received power measurement less. The performances of the proposed algorithm are obtained in urban and rural environment.Conference Object Citation - WoS: 3Citation - Scopus: 3Tetra Trunk için Hücre Seçim Algoritması Performansı(Institute of Electrical and Electronics Engineers Inc., 2016) Karataş, Azad; Özbek, Berna; Bardak, Erinç Deniz; Sönmez, İlkerBu makalede, telsiz haberleşme sistemi Tetra trunk standardı için, kullanıcıların hesapladığı C1 yol kaybı parametresi ve baz istasyonları tarafından yayınlanan baz istasyonunun yeterli kapasiteye sahip olduğu bilgisi kullanılarak, kullanıcıların en uygun baz istasyonunu ile haberleşmesini sağlayan hücre seçim algoritması önerilmiştir. Kullanıcıların hareketsiz olduğu ortamda, hücre içerisindeki farklı sayıda kullanıcılara göre benzetim sonuçları elde edilmiştir. Önerilen hücre seçim algoritmasının mesafe tabanlı hücre seçim algoritmasına göre kullanıcıların baz istasyonlarına daha adil bir şekilde dağılım sağladığı ve bağlanan kullanıcıların daha iyi sinyal karışım ve gürültü oranı değerlerine sahip oldukları gözlemlenmiştir.Conference Object Citation - WoS: 3Citation - Scopus: 3Load Based Cell Selection Algorithm for Digital Mobile Radio(Institute of Electrical and Electronics Engineers Inc., 2016) Yılmaz, Simay; Özbek, Berna; Taş, Murat; Bardak, Erinç DenizDigital mobile radio is one of a digital radio standard for Professional Mobile Radio and it is commonly used for emergency services. The cell selection is very important for digital mobile radio based systems to improve system performance in terms of delay and bit error rate. In this work, we propose an efficient cell selection algorithm for Digital Mobile Radio. In the proposed algorithm, each user selects the base station according to the proposed utility value determined based on both cell load and signal-to-interference-noise ratio. The goal of the proposed algorithm is to balance the distribution of the users among the cells to reduce the waiting time for connection while establishing reliable transmission link. We illustrate the performance results for different scenarios and applications in terms of cell load, signal-to-interference-noise ratio and bit error rate. © 2016 IEEE.