Comparision of Resource Allocation Algorithms on Multi-cell LTE-A Systems by Using FFR

Yıl 2019, Cilt: 24 Sayı: 2, 239 - 254, 30.08.2019

Ahmet Emir , Hakan Kaya

https://doi.org/10.17482/uumfd.446797

Öz

The purpose of resource allocation in LTE-A
(Long Term Evolution Advanced) systems is that the time frequency resource can
be used effectively by the users according to specific parameters. Scheduling
algorithms are used to efficiently allocate system resources among users. In
this study, when allocating frequency among cells in multi-cell LTE-A systems,
the Fractional Frequency Reuse (FFR) technique, a static ICIC (Intercell
Interference Coordination) technique, was first used for GPF (Generalized
Proportional Fair) and AMM (Arithmetic Mean Method) schedulers. BCQI (Best
Channel Quality Indicator, RR (Round Robin) and PF (Proportional Fair), AMM and
GPF schedulers were compared in terms of mean user throughput, edge user
throughput, peak user throughput and fairness. As a result of the simulations,
it was observed that GPF schedulers increased edge user throughputs and system
fairness compared to other schedulers in case of using FFR in multicellular
LTE-A systems.

Anahtar Kelimeler

Averaging Throughput Methods, Fairness, Mean User Throughput, Edge User Throughput, Peak User Throughput, FFR

FFR TEKNİĞİ KULLANILAN ÇOK HÜCRELİ LTE-A SİSTEMLERİNDE KAYNAK ATAMA ALGORİTMALARININ KARŞILAŞTIRILMASI

Öz

Gelişmiş Uzun Dönem Evrim (Long Term Evolution
Advanced – LTE-A) sistemlerinde kaynak atamadaki amaç mevcut zaman ve frekans
kaynağının kullanıcılar tarafından belirli ölçütlere göre etkin şekilde
kullanılabilmesidir. Sistem kaynaklarının kullanıcılar arasında etkin bir
biçimde paylaştırılması amacıyla çizelgeleme algoritmaları kullanılmaktadır. Bu
çalışmada, çok hücreli LTE-A sistemlerinde hücreler arası frekans ataması için
bir statik Hücreler Arası Girişim Uyumu (Intercell Interference Coordination-
ICIC) tekniği olan Kesirsel Frekans Tekrar Kullanımı (Fractional Frequency
Reuse-FFR) tekniği, ilk kez Genelleştirilmiş Oransal Adillik (Generalized
Proportional Fair-GPF) ve Aritmetik Ortalama Metodu (Arithmetic Mean
Method-AMM) çizelgeleyiciler için kullanılmıştır. En İyi Kanal Göstergeci (Best
Channel Quality Indicator-BCQI), RR (Round Robin) ve Oransal Adillik (Proportional
Fair-PF), AMM ve GPF Çizelgeleyicileri ortalama kullanıcı çıkış hızı, kenar
kullanıcı hızı, tepe kullanıcı hızı ve adillik açısından karşılaştırılmıştır.
Simülasyonlar sonucunda, çok hücreli LTE-A sistemlerinde FFR kullanılması
koşulunda, GPF çizelgeleyicilerin diğer çizelgeleyicilere göre kenar kullanıcı
hızlarını ve sistem adilliğini artırdığı gözlemlenmiştir.

Anahtar Kelimeler

Çıkış Hızı Ortalama Alma Metodları, Adillik, Ortalama Kullanıcı Çıkış Hızı, Kenar Kullanıcı Hızı, Tepe Kullanıcı Hızı, FFR

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