Impact of Retransmissions on the Quality of Experience with Realistic Channel Model

Garip D. U. U., Calik O., Karabulut Kurt G. Z.

International Symposium on Wireless Communication Systems (ISWCS), Bologna, İtalya, 28 - 31 Ağustos 2017, ss.299-302 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Bologna
  • Basıldığı Ülke: İtalya
  • Sayfa Sayıları: ss.299-302
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

Communication system design becomes more complicated due to excessive increase of number of users. Systems need to address this load, while providing acceptable levels of Quality of Service (QoS). Additionally, user expectations, quantified via Quality of Experience (QoE), need to be addressed. QoE is calculated on the application layer, where end users interact with the system. As well as user expectations, network performance is another factor that affects QoE levels. Network performance depends on time delays and packet losses. To provide reliable transmission, protocols such as Automatic Repeat Request (ARQ) are applied at the transport layer. Although packet loss decreases with retransmission of packets, the overall delay increases. In this work, we examined QoE change using a measurement based channel model that determines retransmission numbers according to the channel quality. As QoE calculation method ITU-T's E-Model is selected.