Subchannel multiplexing scheme for mobile broadband wireless access services in AMC-based OFDMA system

Dong Hoi Kim, Chung Gu Kang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In the adaptive modulation and coding (AMC)-based orthogonal frequency division multiple access (OFDMA) system for broad-band wireless service, a large number of users with short packets cause a serious capacity mismatch problem, which incurs resource under-utilization when the data rate of subchannel increases with a better channel condition. To handle the capacity mismatch problem, we propose an AMC-based subchannel multiplexing (ASM) scheme, which allows for sharing the same subchannel among the different simultaneous flows of the same user. Along with the ASM scheme, we also consider multi-class scheduling scheme, which employs the different packet scheduling algorithm for the different service class, e.g., packet loss rate-based (PLR) scheduling algorithm for real-time (RT) service and modified minimum bit rate-based (MMBR) scheduling algorithm for non-real-time (NRT) service. In the typical integrated service scenario with voice, video, and data traffic, we have shown that the proposed schemes significantly improve the overall system capacity.

Original languageEnglish
Pages (from-to)2810-2818
Number of pages9
JournalIEICE Transactions on Communications
Issue number7
Publication statusPublished - 2005 Jul


  • AMC
  • AMC-based subchannel multiplexing
  • Multi-class service
  • OFDMA system
  • Packet scheduling

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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