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Multicast broadcast services support in OFDMA-based WiMAX systems

Research output: Contribution to journalJournal article

Published

  • Tao Jiang
  • Weidong Xiang
  • Hsiao-Hwa Chen
  • Qiang Ni
Journal publication date2007
JournalIEEE Communications Magazine
Journal number8
Volume45
Number of pages9
Pages78-86
Original languageEnglish

Abstract

Multimedia stream service provided by broadband wireless networks has emerged as an important technology and has attracted much attention recently. An all-IP network architecture with reliable high-throughput air interface makes orthogonal frequency division multiplexing access (OFDMA)-based mobile worldwide interoperability for microwave access (mobile WiMAX) a viable technology for wireless multimedia services, such as voice over IP (VoIP), mobile TV, and so on. One of the main features in a WiMAX MAC layer is that it can provide differentiated services among different traffic categories with individual QoS requirements. In this article, we first give an overview of the key aspects of WiMAX and describe multimedia broadcast multicast service (MBMS) architecture of the 3GPP. Then, we propose a multicast and broadcast service (MBS) architecture for WiMAX that is based on MBMS. Moreover, we enhance the MBS architecture for mobile WiMAX to overcome the shortcoming of limited video broadcast performance over the baseline MBS model. We also give examples to demonstrate that the proposed architecture can support better mobility and offer higher power efficiency.