LTE-A üzerinden Katmanlararası Optimize Edilmiş Çoklu Video Gönderimi

3. nesil ortaklık projesi, ileri seviyede geliştirilmiş uzun vadeli evrim (LTE-A) ağları üzerinden geliştirilmişçoklu multimedia servisleri için (eMBMS) uygulama katmanlı ileri hata düzeltme kodlarının (AL-FEC)kullanılmasını belirtmiştir. 3GPP, eMBMS’in veri iletimi için sabit bir modülasyon ve kodlama şeklinin (MCS)seçildiği tek frekanslı ağ (MBSFN) üzerinden kullanımını standardize etti. Spektral verimliliği artırmak için3GPP tarafından tek hücreli noktadan çok noktaya (SC-PTM) iletim yöntemi tanımlandı. Bu nedenle, bumakalede LTE-A SC-PTM üzerinden AL-FEC’e dayanan çoklu video gönderimi önerilmektedir. Önerilensistemin performansının analiz edilmesi için katmanlararası LTE-A simülatörü geliştirilmiştir. Simülasyonsonuçları önerilen sistemin LTE-A tarafından önerilen sisteme göre daha fazla kapsama alanı sağladığını (SinyalParazit Gürültü Oranında 4 dB gelişme sağlamaktadır) ve daha az radyo ve ağ kaynağı kullandığını (%48,7 dahafazla spektral verimlilik sağladığını) göstermektedir. MBSFN'den farklı olarak SC-PTM modu, kullanıcılardangeri bildirim alarak her bir gelişen düğümB'de (eNB) MCS gibi sistem parametrelerinin dinamik olarakseçilmesine izin verir

Cross-Layer Optimised Video Multicasting over LTE-A

3rd Generation Partnership Project (3GPP) specified the use of Application Layer Forward Error Correction (AL-FEC) to improve the evolved Multimedia Broadcast Multicast Services (eMBMS) over Long Term Evolution-Advanced (LTE-A) networks. 3GPP standardised the use of eMBMS over a Single Frequency Network (MBSFN) in which a fixed Modulation and Coding Scheme (MCS) is selected for the data transmission. In order to improve the spectral efficiency, a Single-Cell Point-to-Multipoint (SC-PTM) transmission scheme was introduced by 3GPP. Unlike MBSFN, SC-PTM mode allows dynamic selection of the system parameters such as MCS in each evolved NodeB (eNB) by getting feedback from users. Therefore, in this paper an AL-FEC based video multicasting for LTE-A SC-PTM is proposed. A cross-layer LTE-A simulator is developed to analyse the performance of the proposed system. Simulation results show that the proposed system provides higher service coverage, i.e., 4 dB improvement in Signal to Interference Noise Ratio (SINR) and uses less radio and networks resources (i.e., provide up to 48,7% higher spectral efficiency) compared to the legacy LTE-A system.

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