Adaptive modulation for completion time minimization in wireless broadcast networks

YÜKSEL TURGUT A. M., Genc Y.

AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, cilt.72, ss.72-78, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 72
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.aeue.2016.11.019
  • Dergi Adı: AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.72-78
  • Anahtar Kelimeler: Adaptive modulation, Broadcast channel, Completion time, Hierarchical modulation, UNEQUAL ERROR PROTECTION, MULTILEVEL CODED MODULATION, HIERARCHICAL MODULATION, CONSTELLATIONS, TRANSMISSION, SYSTEMS, VIDEO, DELAY, QAM
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

In this work we study the effect of hierarchical modulation on completion time minimization in wireless broadcast channels. Time needed to transmit all bits intended for a particular user is defined as its completion time. In this work we investigate minimizing the maximum completion time over all users in a broadcast channel using hierarchical modulation. We compare time division, opportunistic scheduling, and three different adaptive modulation schemes: rate adaptive hierarchical modulation assisted transmission (HA), modified HA (MHA) and optimal HA (OHA). While HA aims at maximizing total throughput, OHA minimizes the maximum completion time, and MHA provides an intermediate solution. It is observed that OHA always chooses the best superposition order and the constellation size to minimize the maximum completion time. (C) 2016 Elsevier GmbH. All rights reserved.